KR102378271B1 - Sub Module - Google Patents

Abstract

A sub-module is initiated. The sub-module according to an embodiment of the present invention includes a ground unit for discharging power energy stored in the capacitor element. The ground portion includes a ground protrusion energably connected to the capacitor element and a ground rod unit energably inserted and coupled to the ground protrusion. The ground rod unit is electrically connected to the resistor unit, so that power energy stored in the capacitor element may be discharged to the resistor unit. Accordingly, the capacitor element may be discharged only by inserting and coupling the ground rod unit to the ground protrusion.

Description

Sub Module

The present invention relates to a sub-module, and more particularly, to a sub-module having a structure capable of easily grounding a capacitor device in which power is stored.

A flexible transmission system or a new power transmission system (FACTS, Flexible AC Transmission System) is an operating technology that increases the flexibility of the power system by introducing power electronic control technology to the AC power system.

Specifically, the flexible power transmission system may control transmission power by using a power semiconductor switching device. Such a flexible transmission system can maximize the facility utilization rate of the transmission line, increase the transmission capacity, and minimize voltage fluctuations.

In a flexible power transmission system, storage and input/output of power are achieved by a capacitor element. The capacitor element may be controlled by a switching element. Specifically, the switching element may control input and output of current to the capacitor element.

Power may be stored in the capacitor element. In addition, the power stored in the capacitor element may be externally supplied when necessary.

However, depending on the driving environment of the flexible power transmission system, it may be necessary to discharge the capacitor element. For example, it is a case where the capacitor element constituting the flexible power transmission system needs to be moved for the purpose of maintenance.

In this case, when the capacitor element is in a state in which power is stored, there is a fear that a safety accident due to electric shock or the like may occur. In addition, since high voltage power is generally stored in the capacitor element, there is a risk that the capacitor element may be damaged or explode due to an external impact.

Therefore, before the operation of moving the capacitor element, it is necessary to discharge the power energy stored in the capacitor element.

International Patent Publication No. 2017-078238 discloses a capacitor discharge device in a sub-module of an MMC converter. Specifically, a capacitor discharging device including a second resistor for rapidly discharging a voltage stored in the capacitor and a switching unit for applying or releasing current between the capacitor and the second resistor is disclosed.

However, this type of capacitor discharge device requires a separate electric device to discharge the capacitor. That is, separate power and control signals must be applied to the capacitor discharge device.

Moreover, the switching section of the capacitor discharge device of the above type controls the conduction of the second resistor and the capacitor in an electronic manner. Accordingly, there is also a concern that the energization control of the switching unit is disturbed by electromagnetic interference.

Korean Patent Laid-Open Publication No. 10-1999-0049087 discloses an output capacitor discharge device of a power supply. Specifically, when the input voltage of the rectifier becomes less than a predetermined voltage, a discharge device capable of blocking an output to a load side and discharging residual energy of an output capacitor is disclosed.

However, this type of output capacitor discharging device also requires a separate electrical device for discharging the capacitor. In addition, since the output capacitor discharging device is also controlled in an electronic manner, there is a fear that operation reliability may be deteriorated due to electromagnetic interference.

International Patent Publication No. 2017-078238 (2017.05.11.) Korean Patent Laid-Open Patent Document No. 10-199-0049087 (July 5, 1999)

An object of the present invention is to provide a sub-module having a structure capable of solving the above-described problems.

First, an object of the present invention is to provide a sub-module having a structure capable of easily discharging a capacitor for storing power energy.

Another object of the present invention is to provide a sub-module having a structure that does not require a separate electric device to discharge the capacitor.

Another object of the present invention is to provide a sub-module having a structure capable of easily determining whether a connection between a member for discharging and a capacitor is coupled while a process for discharging the capacitor is performed.

Another object of the present invention is to provide a sub-module having a structure in which a member for discharging a capacitor can easily conduct electricity with the capacitor.

Another object of the present invention is to provide a sub-module having a structure capable of easily maintaining the coupled state when a member for discharging the capacitor is coupled to the capacitor to be energized.

Another object of the present invention is to provide a sub-module having a structure capable of discharging a capacitor without disconnecting the capacitor while the capacitor is coupled.

In order to achieve the above object, the present invention provides a capacitor housing for accommodating a capacitor element connected to the outside to be energized; a ground protrusion operably connected to the capacitor element and protruding from one side of the capacitor housing; and a grounding rod unit detachably inserted and coupled to the grounding protrusion so as to conduct electricity with the grounding protrusion, wherein the grounding rod unit is energably connected to a resistor, so that the grounding rod unit and the grounding protrusion are energably coupled to each other. , to provide a sub-module configured such that the capacitor element is grounded.

In addition, the ground rod unit of the sub-module includes a body portion extending in one direction and having a predetermined space therein extending in the one direction; a grounding conductor in the inner space of the body, located on one side facing the grounding protrusion, and in contact with the grounding protrusion so as to be energized; And in the inner space of the body portion, extending from the ground conductor portion toward the other side opposite to the one side, it may include a ground conductor connected to the ground conductor to be energized.

In addition, one side of the grounding conductor opposite to the grounding conductor of the sub-module may be electrically connected to the resistor.

The sub-module may include a capacitor connector energably connected to the capacitor element and protruding from one side of the capacitor housing, and the capacitor connector may be electrically connected to the ground protrusion.

In addition, the sub-module may include a ground connector that is electrically connected to the capacitor connector, and the ground protrusion is formed to protrude from the ground connector.

In addition, the sub-module may include a valve assembly positioned at one side of the capacitor housing to be electrically connected to the capacitor housing, and the ground protrusion may extend toward the valve assembly.

In addition, the sub-module includes a case unit coupled to the valve assembly and accommodating an IGBT (Insulated Gate Bipolar Transistor) energably coupled to the valve assembly, and at one side of the case unit, the capacitor housing A ground rod through hole formed through in the direction to which the ground rod unit is detachably coupled therethrough may be located.

Also, in the sub-module, the ground rod through-hole may be disposed such that a central axis thereof is the same as a central axis of the ground protrusion.

In addition, in the sub-module, a plurality of ground protrusions are provided, a plurality of ground protrusions are arranged to be spaced apart from each other, and a plurality of ground rod units are provided, and the plurality of ground rod units are respectively provided on the plurality of ground protrusions. It may be detachably inserted and coupled.

In addition, the present invention, a capacitor assembly for accommodating the capacitor element therein; a case unit accommodating an IGBT electrically connected to the capacitor assembly; and a ground rod unit electrically connected to the capacitor element and the resistor unit to ground the capacitor element, wherein the capacitor assembly is electrically connected to the capacitor element and protrudes toward the case unit. a ground connector including a capacitor connector, the upper side of the capacitor connector being electrically connected to the capacitor connector; and a ground protrusion protruding from the ground connector in a direction toward the case unit, and provided with a ground protrusion energably connected to the ground connector, wherein the ground rod unit provides a sub-module that is detachably inserted and coupled to the ground protrusion. do.

In addition, at an upper side of the case unit of the sub-module, one side facing the capacitor assembly and the other side opposite to the one side are respectively provided with protrusions protruding from the upper side of the case unit by a predetermined distance, the protrusions A ground rod through-hole that is formed to pass through in a direction toward the capacitor assembly may be provided inside each.

In addition, each of the ground rod through-holes of the sub-module is disposed such that a central axis thereof is the same as a central axis of the grounding protrusion, and the grounding rod unit has one side of the grounding rod through-hole opposite to the grounding protrusion, the grounding rod through-hole Each may be through-coupled.

According to the present invention, the following effects can be achieved.

First, the capacitor element is electrically connected to the ground protrusion. The ground protrusion is formed to protrude toward the valve assembly. A ground rod unit is inserted and coupled to the ground protrusion.

When the ground rod unit is inserted and coupled to the grounding protrusion, the grounding protrusion and the grounding rod unit are energably connected. Accordingly, the capacitor element and the ground rod unit may be electrically connected to each other. Accordingly, the power energy stored in the capacitor element is discharged to the resistor unit energably connected to the ground rod unit.

Accordingly, even when the ground rod unit is inserted into the ground protrusion, the power energy stored in the capacitor element can be easily discharged.

Further, the discharging process of the capacitor element is achieved by the energizable contact of the ground protrusion and the ground rod unit. That is, a switch, etc. for measuring the voltage of the capacitor element or the like for controlling energization according to the measured voltage is not required.

Accordingly, power energy stored in the capacitor element may be discharged only through a physical process of inserting the ground rod unit into the ground protrusion. Accordingly, since a separate electric device is not required, reliability of the discharging process may be improved.

In addition, the ground rod unit is inserted and coupled to the ground protrusion, so that the ground protrusion and the ground protrusion are energably contacted. That is, when the ground rod unit is not inserted and coupled to the ground protrusion, the ground rod unit and the ground protrusion are not energized.

Accordingly, the user can determine whether the ground rod unit is inserted and coupled to the ground protrusion, and can easily determine whether the capacitor element is connected to the grounding member using the result.

Further, the ground protrusion is formed extending toward the valve assembly energably connected to the capacitor element. A case unit having a ground rod through hole is coupled to the valve assembly.

The ground rod through hole is formed through the ground protrusion in the extending direction. In an embodiment, the ground rod through hole and the ground protrusion may be disposed to have the same central axis. After the ground rod unit is through-coupled to the ground rod through hole, it may be inserted and coupled to the ground protrusion.

Accordingly, when the ground rod unit is coupled through the ground rod through hole, the ground rod unit may be guided to proceed toward the ground protrusion. Accordingly, the ground rod unit can be easily coupled to the ground protrusion.

In addition, a plurality of ground rod through-holes are formed. The plurality of ground rod through-holes are disposed to be spaced apart from each other by a predetermined distance along the central axis of the ground protrusion. As the ground rod unit moves toward the ground protrusion, the ground rod unit is through-coupled to a plurality of ground rod through holes spaced apart from each other, respectively.

Accordingly, the ground rod unit inserted and coupled to the ground protrusion may be supported by the ground rod through hole. Accordingly, the coupling state between the ground protrusion and the ground rod unit may be stably maintained.

Also, the process proceeds from the valve assembly located on the front side of the capacitor assembly housing the capacitor element. That is, the ground rod unit is coupled to the ground protrusion after passing through the ground rod through hole provided in the case unit coupled to the valve assembly.

Accordingly, the user can discharge the capacitor element by inserting the ground rod unit from the easily accessible front side without removing the capacitor element or the capacitor assembly.

1 is a perspective view illustrating a modular multi-level converter including a sub-module according to an embodiment of the present invention.
2 is a perspective view illustrating a sub-module according to an embodiment of the present invention.
3 is a partially enlarged perspective view illustrating a connection relationship between the capacitor assembly and the valve assembly of the sub-module of FIG. 2 .
4 is a perspective view illustrating the sub-module of FIG. 2 from another angle;
5 is a partially enlarged perspective view illustrating a ground portion coupled to the capacitor assembly of the sub-module of FIG. 2 .
6 is a cross-sectional view showing an internal configuration of a ground rod unit connected to the ground of FIG. 5 so as to be energized.
7 is a perspective view illustrating a valve assembly provided in the sub-module of FIG. 2 .
FIG. 8 is a partially transparent perspective view illustrating electrical equipment and insulating members provided in the valve assembly of FIG. 7 .
9 is a partially enlarged perspective view illustrating a conductive wire for conducting electricity between a member for insulation and the rail assembly of FIG. 8 .
10 is a partially exploded perspective view illustrating a coupling relationship of an explosion-proof frame part provided in the valve assembly of FIG. 7 .
11 is an exploded perspective view from another angle illustrating a coupling relationship of an explosion-proof frame part provided in the valve assembly of FIG. 7 .
12 is a perspective view illustrating the case unit provided in FIGS. 10 and 11 .
13 is a front view illustrating a rail assembly provided in the sub-module of FIG. 2 .
14 is a perspective view illustrating the rail assembly and the separation preventing unit of FIG. 13 .
FIG. 15 is a side view showing a state in which the separation preventing part of FIG. 14 is inserted into the stop groove;
FIG. 16 is a side view illustrating a state in which the separation preventing unit of FIG. 14 is seated on a support.
17 is a perspective view illustrating a process in which the cart unit is drawn out using the installation/separation unit provided in the sub-module of FIG. 2 .
18 is a perspective view illustrating a process in which the cart unit is coupled using an installation/separation unit provided in the sub-module of FIG. 2 .
19 is a rear perspective view illustrating a short circuit adjusting unit provided in the modular multi-level converter of FIG. 1 .
20A is a perspective view illustrating a state before each sub-module is short-circuited with each other by the short circuit adjusting unit of FIG. 19 .
20B is a perspective view illustrating a state in which each sub-module is shorted to each other by the short circuit adjusting unit of FIG. 19 .
21 is a schematic diagram illustrating a process in which the short circuit adjusting lever of the indicator member provided in the short circuit adjusting unit of FIG. 19 is rotated.
22 is a perspective view illustrating a cooling passage provided in the sub-module of FIG. 2 .
FIG. 23 is a partially enlarged perspective view showing the main piping unit of the cooling passage of FIG. 22 from another angle;
Fig. 24 is a partially enlarged perspective view showing the main piping unit of Fig. 23 from another angle;
FIG. 25 is a partially enlarged perspective view showing a coupling relationship between the pipe connecting unit of the cooling passage of FIG. 22 and the valve connecting pipe; FIG.

Hereinafter, a sub-module according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the following description, in order to clarify the characteristics of the present invention, descriptions of some components may be omitted.

1. Definition of terms

The term “energized” used in the following description refers to a state in which an electrical signal such as a current is transmitted between one or more members. In an embodiment, the energized state may be formed by a conductive wire or the like.

The term “communication” used in the following description refers to a state in which one or more members are fluidly connected to each other. In an embodiment, the communication state may be achieved by a pipe or the like.

The term "cooling fluid" used in the following description means any fluid that can exchange heat with another member. In one embodiment, the cooling fluid may be provided as water.

The terms “front side”, “rear side”, “left”, “right”, “top” and “bottom” used in the following description will be understood with reference to the coordinate system shown in FIG. 1 . That is, in the following description, it is assumed that the valve assembly 200 is located on the front side of the capacitor assembly 100 .

2. Description of the configuration of the modular multilevel converter (1) according to an embodiment of the present invention

Referring to FIG. 1 , a modular multi-level converter 1 according to an embodiment of the present invention is illustrated. The modular multi-level converter 1 may function as a STATCOM (Static Synchronous Compensator).

That is, the modular multi-level converter 1 is a kind of stationary reactive power compensator, and functions to improve stability by supplementing the voltage lost during transmission and distribution of electricity or power.

The multi-level converter 1 according to an embodiment of the present invention includes a plurality of sub-modules 10 and a frame 20 .

The sub-module 10 substantially performs the function of the above-described modular multi-level converter 1 . A plurality of sub-modules 10 may be provided. According to the number of sub-modules 10 provided, the capacity of the modular multi-level converter 1 may be increased.

Each sub-module 10 is electrically connected to each other. In an embodiment, each sub-module 10 may be connected in series.

In the illustrated embodiment, a total of six sub-modules 10 are provided, and are arranged to be spaced apart from each other by a predetermined distance in the left-right direction. The number of provided sub-modules 10 may be changed.

The sub-module 10 is supported by the frame 20 . In the illustrated embodiment, the sub-module 10 is supported by a frame 20 forming one layer.

The frame 20 forms the framework of the modular multi-level converter 1 . The frame 20 supports the sub-module 10 from the upper side or the lower side.

A detailed description of the sub-module 10 will be described later.

The frame 20 may be formed of a material having high rigidity. In one embodiment, the frame 20 may be formed of a steel material. In addition, the shape of the frame 20 is provided in the form of an H-beam, so that the rigidity in the axial direction of the frame 20 can be further reinforced.

A plurality of frames 20 may be provided. The plurality of frames 20 may be stacked on each other. The sub-modules 10 supported by the frame 20 may also be arranged in a plurality of layers. Accordingly, the capacity of the modular multi-level converter 1 can be increased.

In the illustrated embodiment, the frame 20 includes a vertical frame 21 , a horizontal frame 22 and a support 23 . Further, referring further to FIG. 19 , the frame 20 further includes an insulating member 24 , and referring further to FIG. 22 , the frame 20 further includes a fixing frame 25 .

The vertical frame 21 forms a frame in the vertical direction of the frame 20 . The vertical frame 21 is formed to extend in the vertical direction. A coupling plate is provided at the upper and lower ends of the vertical frame 21 . The coupling plate is provided in a rectangular plate shape. The coupling plate is coupled to the ground, or coupled to the coupling plate of another frame (20) stacked vertically.

In the illustrated embodiment, the vertical frame 21 is provided on the left and right sides of the front and the left and right sides of the rear, respectively. Accordingly, a total of four vertical frames 21 are provided. The number of vertical frames 21 may be changed.

The vertical frame 21 is coupled to the horizontal frame 22 . With the horizontal frame 22 , the vertical frame 21 may maintain a preset angle.

The horizontal frame 22 forms a frame in the front-rear direction of the frame 20 . The horizontal frame 22 is formed to extend in the front-rear direction. The front side end of the horizontal frame 22 is coupled to a vertical frame 21 disposed on the front side. The rear side end of the horizontal frame 22 is coupled to a vertical frame 21 disposed on the rear side.

Accordingly, deformation in the front-rear direction of the vertical frame 21 and deformation in the vertical direction of the horizontal frame 22 may be minimized.

In the illustrated embodiment, the horizontal frame 22 is provided on the left and right sides, respectively. Further, on the left and right sides, the horizontal frame 22 is disposed to be spaced apart from each other in the vertical direction. Accordingly, a total of four horizontal frames 22 are provided, but the number may be changed.

A support 23 is coupled to the horizontal frame 22 . The horizontal frame 22 supports the left and right ends of the support 23 .

The support part 23 supports the sub-module 10 from the lower side. The support 23 is coupled to the horizontal frame 22 . Specifically, the left end of the support 23 is coupled to the horizontal frame 22 provided on the left. The right end of the support 23 is coupled to the horizontal frame 22 provided on the right.

The support 23 includes a plurality of beam members. Each beam member may be provided in the form of an H-Beam. A plurality of beam members are spaced apart from each other by a predetermined distance, and are continuously arranged in the front-rear direction.

The sub-module 10 is seated on the upper side of the support part 23 . As will be described later, the rail unit 540 of the rail assembly 500 is fixedly coupled to the upper side of the support 23 . In addition, the cart unit 510 of the sub-module 10 is slidably coupled to the rail unit 540 .

Referring further to FIG. 19 , among the plurality of beam members included in the support unit 23 , a short-circuit adjusting unit 800 may be provided in a beam member positioned at the rearmost side. A detailed description thereof will be provided later.

The fixed frame 25 extends at a predetermined angle with the horizontal frame 22 .

In an embodiment, the fixed frame 25 may extend from the left horizontal frame 22 to the right horizontal frame 22 . Also, in one embodiment, the fixed frame 25 may extend vertically with respect to the horizontal frame 22 .

3. Description of the configuration of the sub-module 10 according to an embodiment of the present invention

Referring to FIG. 1 , a modular multi-level converter 1 according to an embodiment of the present invention includes a sub-module 10 . The sub-module 10 is provided in a modular form, and may be added to or excluded from the modular multi-level converter 1 .

That is, the number of sub-modules 10 included in the modular multi-level converter 1 may be changed. Accordingly, the capacity of the modular multi-level converter 1 may be varied.

2 to 9 , the sub-module 10 according to the illustrated embodiment includes a capacitor assembly 100 and a valve assembly 200 . In addition, with further reference to FIGS. 19 and 22 , the grounding part 300 , the explosion-proof frame part 400 , the rail assembly 500 , the departure prevention part 600 , the installation separation part 700 , the short circuit adjustment part 800 . and a cooling passage part 900 .

Hereinafter, each configuration of the sub-module 10 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings, but the grounding part 300, the explosion-proof frame part 400, the rail assembly 500, and the separation prevention The unit 600 , the installation/separation unit 700 , the short circuit adjustment unit 800 , and the cooling flow path unit 900 will be described as separate sections.

(1) Description of the capacitor assembly 100

The capacitor assembly 100 includes a capacitor element (not shown) therein. The capacitor assembly 100 is electrically connected to the valve assembly 200 . A capacitor element (not shown) inside the capacitor assembly 100 may be charged or discharged by a switching operation of the valve assembly 200 .

Accordingly, the capacitor element (not shown) may store power energy input to the sub-module 10 . Power energy stored in the capacitor element (not shown) may be used as a power source for driving each component of the sub-module 10 . In addition, the power energy may be supplied as reactive power to an external power system to which the sub-module 10 is energably connected.

In the illustrated embodiment, the capacitor assembly 100 is connected to the rear side of the valve assembly 200 . This is due to the frequent occurrence of a situation in which the valve assembly 200 needs to be maintained rather than the capacitor assembly 100 . That is, as will be described later, this is to easily separate only the valve assembly 200 toward the front side.

Capacitor assembly 100 is supported by rail assembly 500 . Specifically, the capacitor assembly 100 is mounted on the capacitor cart unit 510a of the rail assembly 500 . In an embodiment, the capacitor assembly 100 may be fixedly coupled to the capacitor cart unit 510a.

As will be described later, the capacitor cart unit 510a may be slid to the front side or the rear side along the rail unit 540 . Accordingly, the capacitor assembly 100 may also slide to the front side or the rear side together with the capacitor cart unit 510a.

In the illustrated embodiment, the capacitor assembly 100 is formed to have a larger size than the valve assembly 200 . This is due to the size of the capacitor element (not shown) mounted inside the capacitor assembly 100 . That is, the size of the capacitor assembly 100 may be changed according to the size of the capacitor element (not shown).

The capacitor assembly 100 includes a capacitor housing 110 and a capacitor connector 120 .

The capacitor housing 110 forms the outer shape of the capacitor assembly 100 . A predetermined space is formed inside the capacitor housing 110 . A capacitor element (not shown) may be mounted in the space. The mounted capacitor element (not shown) is electrically connected to the valve assembly 200 by the capacitor connector 120 .

The capacitor housing 110 may be formed of a material having rigidity. This is in order not to affect the adjacent sub-module 10 and the valve assembly 200, etc. even when the capacitor element (not shown) accommodated therein explodes due to an unexpected cause.

A residual water collection unit 960 of a cooling flow passage 900 to be described later is coupled to the upper side of the capacitor housing 110 . In addition, the lower side of the capacitor housing 110 is coupled to the capacitor cart unit (510a).

The front side of the capacitor housing 110 is electrically connected to the valve assembly 200 by the capacitor connector 120 .

The capacitor connector 120 electrically connects the capacitor assembly 100 and the valve assembly 200 . The capacitor connector 120 is electrically connected to the capacitor element (not shown) and the valve connector 220 of the valve assembly 200 .

When the capacitor assembly 100 or the valve assembly 200 is slid toward each other, the capacitor connector 120 may be slid to the valve connector 220 to be inserted and coupled. Accordingly, an energized state between the capacitor connector 120 and the valve connector 220 is formed.

By the coupling method, an energized state between the capacitor assembly 100 and the valve assembly 200 may be easily formed or released.

In the illustrated embodiment, the capacitor connector 120 is formed on one side of the capacitor assembly 100 facing the valve assembly 200 , that is, on the front side. The capacitor connector 120 is provided in a plate shape protruding from the front side of the capacitor housing 110 by a predetermined distance.

The shape of the capacitor connector 120 may be any shape capable of being electrically coupled to the valve connector 220 .

A plurality of capacitor connectors 120 may be provided. In the illustrated embodiment, the capacitor connector 120 includes a first capacitor connector 121 provided on the left side and a second capacitor connector 122 provided on the right side.

The first capacitor connector 121 is slidably coupled to the valve connector 220 provided on the left side to be energized. In addition, the second capacitor connector 122 is slidably coupled to the valve connector 220 provided on the right side to be energized.

(2) Description of the valve assembly 200

The valve assembly 200 is a part in which the sub-module 10 is electrically connected to an external power source or load. In addition, the valve assembly 200 may be electrically connected to the capacitor assembly 100 so that power energy may be input or output.

The valve assembly 200 may include a plurality of switching modules therein. In an embodiment, the switching module may be provided as an insulated gate bipolar transistor (IGBT) 440 .

Also, the valve assembly 200 may include a control board for controlling the switching module therein. In one embodiment, the control board may be provided as a printed circuit board (PCB, Printed Circuit Board) (280).

The sub-module 10 according to an embodiment of the present invention can prevent damage to another IGBT 440 and other components of the sub-module 10 due to the explosion of one IGBT 440 . The IGBT 440 and a configuration for achieving the above object will be described as a separate clause in the "Explosion-proof frame part 400".

In the illustrated embodiment, the valve assembly 200 is located on the front side of the capacitor assembly 100 . This is due to the fact that the maintenance of the valve assembly 200 is performed more frequently than the maintenance of the capacitor assembly 100 .

The valve assembly 200 may be easily coupled to or separated from the capacitor assembly 100 by the installation and separation unit 700 . A detailed description thereof will be provided later.

The valve assembly 200 is supported by a rail assembly 500 . Specifically, the valve assembly 200 is seated on the valve cart unit 510b of the rail assembly 500 . In one embodiment, the valve assembly 200 may be fixedly coupled to the valve cart unit (510b).

As will be described later, the valve cart unit 510b may be slid to the front side or the rear side along the rail unit 540 . Accordingly, the valve assembly 200 may also be slid to the front side or the rear side together with the valve cart unit (510b).

In the illustrated embodiment, the valve assembly 200 includes a valve cover part 210 , a valve connector 220 , an input busbar 230 , a bypass switch 240 , an output busbar 250 , and an insulating housing 260 . ), an insulating layer 270 and a printed circuit board 280 .

The valve cover portion 210 forms part of the outer shape of the valve assembly 200 . Specifically, the valve cover part 210 forms the left and right outer surfaces of the valve assembly 200 .

The valve cover part 210 is configured to cover the insulating housing 260 . The printed circuit board 280 mounted inside the insulating housing 260 is not arbitrarily exposed to the outside by the valve cover part 210 .

The valve cover part 210 may be fixedly coupled to the insulating housing 260 through a fastening member such as a screw member.

The valve cover part 210 is configured to shield an electromagnetic noise component generated from the printed circuit board 280 or the IGBT 440 . In an embodiment, the valve cover part 210 may be formed of an aluminum (Al) material.

A plurality of through-holes are formed in the valve cover part 210 . The through hole may communicate with the inner space of the insulating housing 260 and the outside. Air may be introduced through the through hole to cool the printed circuit board 280 or the IGBT 440 .

The valve cover part 210 is electrically connected to the cart unit 510 of the rail assembly 500 . The connection may be achieved by the ground conductor 340 . Accordingly, the valve cover part 210 may be grounded so that unnecessary energization may not occur.

A direction from the valve cover 210 toward the explosion-proof frame 400 may be defined as an “inward direction”. In addition, a direction from the explosion-proof frame 400 toward the valve cover 210 may be defined as an “outer direction”.

An insulating housing 260 is positioned in the inner direction of the valve cover part 210 .

The valve connector 220 electrically connects the valve assembly 200 and the capacitor assembly 100 . The valve connector 220 is located on one side of the valve assembly 200 facing the capacitor assembly 100 , the rear side in the illustrated embodiment.

The valve connector 220 is formed to extend in one direction, the front-rear direction in the illustrated embodiment.

One side of the valve connector 220 , in the illustrated embodiment, a front side, is energably connected to the output busbar 250 . In the illustrated embodiment, the one side of the valve connector 220 is screwed to the output busbar 250 .

The other side of the valve connector 220 , the rear side in the illustrated embodiment, is energably connected to the capacitor connector 120 .

The valve connector 220 may include a pair of plate members spaced apart from each other by a predetermined distance. That is, in the illustrated embodiment, each valve connector 220 is provided in the outward direction and the inward direction, respectively, and disposed to face each other.

The capacitor connector 120 may be slid into or ejected from the space formed by the pair of plate members being spaced apart from each other by the predetermined distance.

One end of the pair of plate members facing the capacitor assembly 100, in the illustrated embodiment, the rear end is formed to be rounded in the outward direction. Accordingly, the slide coupling and discharging can be easily performed.

Each of the pair of plate members may include a plurality of bar members. In the illustrated embodiment, the pair of plate members includes four bar members stacked in the vertical direction. The number may be changed.

A plurality of valve connectors 220 may be provided. In the illustrated embodiment, two valve connectors 220 are spaced apart from each other by a predetermined distance in the vertical direction. In addition, each of the two valve connectors 220 is provided on each of the two output busbars 250 , and a total of four valve connectors 220 are provided.

The number of valve connectors 220 may be changed to any number capable of forming an energized state of the valve assembly 200 and the capacitor assembly 100 .

An input busbar 230 connects the sub-module 10 to an external power source or a load so as to be energized.

In the illustrated embodiment, the input bus bar 230 is formed to protrude a predetermined distance toward the front side of the explosion-proof frame part 400 . The front side of the input bus bar 230 is electrically connected to an external power source or load. The front side of the input bus bar 230 is electrically connected to a bypass switch 240 .

In addition, the rear side of the input bus bar 230 is connected to the energized bus bar 420 to be energized.

A plurality of input busbars 230 may be provided. In the illustrated embodiment, the input busbar 230 includes a first input busbar 231 positioned on the upper side and a second input busbar 232 positioned on the lower side.

The first input bus bar 231 is electrically connected to the first energized bus bar 421 . Accordingly, the first input busbar 231 may be electrically connected to the first IGBT 441 .

The second input busbar 232 is electrically connected to the second energizing busbar 422 . Accordingly, the second input busbar 232 may be electrically connected to the second IGBT 442 .

The first input bus bar 231 and the second input bus bar 232 are respectively connected to an external power source or a load to be energized. In addition, the first input busbar 231 and the second input busbar 232 are electrically connected to the bypass switch 240 .

The bypass switch 240 is configured to exclude the sub-module 10 from the modular multi-level converter 1 when a problem occurs in any component of the sub-module 10 .

Specifically, the bypass switch 240 may electrically short-circuit the first input busbar 231 and the second input busbar 232 of the corresponding sub-module 10 . Accordingly, the current flowing into one of the first input busbar 231 and the second input busbar 232 of the corresponding sub-module 10 flows out through the other.

Accordingly, the sub-module 10 may function as a wire and may be electrically excluded from the modular multi-level converter 1 .

The bypass switch 240 is positioned between the first input busbar 231 and the second input busbar 232 on the front side of the explosion-proof frame part 400 . The bypass switch 240 is electrically connected to the first input bus bar 231 and the second input bus bar 232 .

The output busbar 250 electrically connects the IGBT 440 and the capacitor assembly 100 .

In the illustrated embodiment, the output busbar 250 is formed to protrude a predetermined distance in the direction toward the capacitor assembly 100 , that is, to the rear side. A valve connector 220 is energably coupled to the rear side of the output busbar 250 . In one embodiment, the valve connector 220 may be screwed to the output busbar 250 .

The front side of the output busbar 250 may be energically connected to the energized busbar 420 , which is energably connected to the IGBT 440 .

A plurality of output busbars 250 may be provided. In the illustrated embodiment, two output busbars 250 are provided and disposed to be spaced apart from each other by a predetermined distance. The predetermined distance may be the same as a distance between the first capacitor connector 121 and the second capacitor connector 122 .

The output busbar 250 may be coupled to the case unit 410 to cover the IGBT accommodating part 413 together with the energized busbar 420 . The output busbar 250 and the energizing busbar 420 are connected to be energized.

In the illustrated embodiment, the output busbar 250 is located on the rear side of the energized busbar 420 . Accordingly, the output busbar 250 is configured to cover the rear side of the IGBT receiving portion 413 .

The output busbar 250 is a first part covering the IGBT accommodating part 413, bent at a predetermined angle in the first part, and covers one side (the rear side in the illustrated embodiment) of the case unit 410 . and a third portion extending from the second portion and the second portion to which the valve connector 220 is coupled.

The insulating housing 260 accommodates the printed circuit board 280 therein. In addition, the insulating housing 260 is in energized contact with the energizing bus bar 420 to energize the printed circuit board 280 and the IGBT 440 . Accordingly, the IGBT 440 may be operated according to the control signal calculated by the printed circuit board 280 .

A plurality of insulating housings 260 are provided. In the illustrated embodiment, two insulating housings 260 are provided, respectively, on the left and right sides of the explosion-proof frame part 400 .

The outer direction of the insulating housing 260 , that is, a direction away from the explosion-proof frame part 400 , that is, one side of the direction opposite to the explosion-proof frame part 400 may be shielded by the valve cover part 210 . In the illustrated embodiment, the valve cover part 210 is provided on the left side of the insulating housing 260 positioned on the left and on the right side of the insulating housing 260 positioned on the right side, respectively.

The insulating housing 260 may shield electromagnetic noise generated from the printed circuit board 280 or the IGBT 440 . The insulating housing 260 may be formed of an aluminum material.

Accordingly, electromagnetic noise generated from the printed circuit board 280 or the IGBT 440 by the valve cover part 210 and the insulating housing 260 is not randomly leaked to the outside.

A predetermined space is formed inside the insulating housing 260 . An insulating layer 270 and a printed circuit board 280 are positioned in the space.

The insulating housing 260 includes a first wall 261 , a second wall 262 , a third wall 263 , and a fourth wall 264 .

The first wall 261 forms a front side wall of the insulating housing 260 . The second wall 262 forms the rear side wall of the insulating housing 260 . The first wall 261 and the second wall 262 are disposed to face each other.

The third wall 263 forms an upper wall of the insulating housing 260 . The fourth wall 264 forms the lower wall of the insulating housing 260 . The third wall 263 and the fourth wall 264 are disposed to face each other.

The inside of the first to fourth walls 261 , 262 , 263 , and 264 may be formed of a material capable of blocking electromagnetic noise. In an embodiment, the first to fourth walls 261 , 262 , 263 , and 264 may be formed of an aluminum material.

In addition, the bottom surface covered by the insulating layer 270 , that is, one side of the insulating housing 260 facing the valve cover part 210 may also be formed of an aluminum material.

Accordingly, the inner space of the insulating housing 260 may be electrically shielded by the valve cover part 210 and each surface of the insulating housing 260 . As a result, electromagnetic noise generated from the printed circuit board 280 or the IGBT 440 is not randomly leaked to the outside.

The insulating layer 270 and the printed circuit board 280 are accommodated in a space surrounded by the first to fourth walls 261 , 262 , 263 , and 264 .

The insulating layer 270 is configured to block electromagnetic noise generated from the IGBT 440 from flowing into the inner space of the insulating housing 260 . Also, the insulating layer 270 may block electromagnetic noise generated from the printed circuit board 280 from moving toward the IGBT 440 .

The insulating layer 270 is configured to cover the one side surface of the insulating housing 260 . That is, the insulating layer 270 is positioned between the one side of the insulating housing 260 facing the valve cover part 210 and the printed circuit board 280 .

Accordingly, one side of the space formed inside the insulating housing 260 toward the explosion-proof frame part 400 is surrounded by the insulating layer 270 .

The shape of the insulating layer 270 may be changed to correspond to the shape of the one surface of the insulating housing 260 .

The insulating layer 270 may be formed of any material capable of blocking electromagnetic noise. In an embodiment, the insulating layer 270 may be formed of a polyimide material.

The printed circuit board 280 is positioned on one side of the insulating layer 270 facing the valve cover part 210 , that is, in an outer direction.

The printed circuit board 280 calculates a control signal for controlling the IGBT 440 . Also, the printed circuit board 280 may transmit the calculated control signal to the IGBT 440 to control the driving of the sub-module 10 .

The printed circuit board 280 is electrically connected to the IGBT 440 . In addition, the printed circuit board 280 is electrically connected to the energized bus bar 420 . Accordingly, external power and control signals may be transmitted to the printed circuit board 280 .

The printed circuit board 280 is accommodated in the inner space of the insulating housing 260 . As described above, the insulating layer 270 is positioned between the printed circuit board 280 and the one surface of the insulating housing 260 .

Accordingly, the printed circuit board 280 may pass through the insulating layer 270 and the one side of the insulating housing 260 to be electrically connected to the energized busbar 420 .

A plurality of printed circuit boards 280 may be provided. In the illustrated embodiment, five printed circuit boards 280 are provided, but the number may be changed.

4. Description of the grounding unit 300 according to an embodiment of the present invention

The sub-module 10 according to an embodiment of the present invention includes a grounding unit 300 . The ground part 300 may be electrically connected to a capacitor element (not shown) provided in the capacitor assembly 100 . Accordingly, the power energy stored in the capacitor element (not shown) may be grounded and discharged.

Specifically, there may be a case in which the sub-module 10 needs to be moved for the purpose of maintenance or movement. At this time, if power energy remains in the capacitor element (not shown), there is a risk of explosion.

Accordingly, the sub-module 10 according to the embodiment of the present invention can easily discharge the power energy stored in the capacitor element (not shown) through the ground unit 300 .

In the illustrated embodiment, the grounding unit 300 includes a grounding rod unit 310 , a grounding connector 320 , a grounding protrusion 330 , and a grounding conductor 340 .

The ground rod unit 310 forms the body of the ground unit 300 . The ground rod unit 310 is formed to extend in one direction, in the front-rear direction in the illustrated embodiment.

The ground rod unit 310 may be inserted and coupled to the ground protrusion 330 connected to the capacitor connector 120 to be energized. Also, the ground rod unit 310 may be electrically connected to the ground protrusion 330 .

Accordingly, power energy stored in the capacitor element (not shown) may be grounded through the capacitor connector 120 and the ground rod unit 310 .

The ground rod unit 310 may be detachably inserted and coupled to the ground protrusion 330 . When grounding of the capacitor element (not shown) is not required, the ground rod unit 310 may move away from the capacitor assembly 100 , that is, in a direction opposite to the capacitor assembly 100 . Accordingly, the ground rod unit 310 may be separated from the ground protrusion 330 .

The ground rod unit 310 may be through-coupled to the ground rod through hole 412 of the explosion-proof frame unit 400 . The ground rod unit 310 may be guided to advance toward the ground protrusion 330 by the ground rod through hole 412 .

In the illustrated embodiment, the ground rod unit 310 has a cylindrical shape in which a hollow part is formed. The ground rod unit 310 may have any shape capable of being electrically coupled to the ground protrusion 330 . In this case, the shape of the ground rod unit 310 is preferably determined to correspond to the shape of the ground rod through hole 412 .

A plurality of ground rod units 310 may be provided. In the illustrated embodiment, the ground rod unit 310 includes a first ground rod unit 310a and a second ground rod unit 310b.

The first ground rod unit 310a is energably inserted and coupled to the first ground protrusion 331 . In addition, the second ground rod unit 310b is energably inserted and coupled to the second ground protrusion 332 .

The ground rod unit 310 includes a body part 311 , a coupling part 312 , a ground conductor part 313 , a ground conductor part 314 , a sealing part 315 , and a resistance part 316 .

The body portion 311 forms the body of the ground rod unit 310 . The body portion 311 is formed to extend in the longitudinal direction, in the illustrated embodiment, in the front-rear direction. The body part 311 has a cylindrical shape having a circular cross section, and a hollow part is formed therein. Various components for grounding are mounted in the hollow part.

The coupling part 312 is a part where the ground rod unit 310 is coupled to the ground protrusion 330 . The coupling part 312 is formed to extend a predetermined distance from one side toward the ground protrusion 330, from the rear end in the illustrated embodiment to the front side.

The coupling part 312 is located in a hollow formed inside the body part 311 . The outer surface of the coupling portion 312 may be in contact with the inner surface of the body portion 311 surrounding the hollow portion.

A hollow part is formed inside the coupling part 312 . The diameter of the hollow part may be formed to be less than or equal to the diameter of the ground protrusion 330 .

The coupling part 312 may be formed of an elastically deformable material. Accordingly, when the ground protrusion 330 is inserted into the hollow portion of the coupling part 312 , the coupling part 312 is deformed in shape and can store restoring force. By the restoring force, the coupling part 312 may stably hold the ground protrusion 330 .

In an embodiment, the coupling part 312 may be formed of a rubber material.

Accordingly, the ground protrusion 330 is fitted to the coupling part 312 , so that the coupling state between the ground rod unit 310 and the ground protrusion 330 may be stably maintained.

The ground conductor part 313 is electrically connected to the ground protrusion part 330 . Power energy stored in the capacitor element (not shown) may be transferred to the resistor unit 316 through the ground conductor unit 313 .

The ground conductor part 313 is formed to surround the coupling part 312 from the outside. That is, one side of the ground conductor part 313 facing the ground protrusion 330 , in the illustrated embodiment, the rear end portion forms the rear end end of the body portion 311 .

A hollow part is formed inside the ground conductor part 313 . A part of the hollow part, in the illustrated embodiment, the coupling part 312 is accommodated on the rear side. A portion in contact with the end of the ground protrusion 330 is formed on the remaining part of the hollow portion, in the illustrated embodiment, on the front side. The shape of the part may be determined to correspond to the shape of the ground protrusion 330 .

The ground conductor part 313 is formed to extend in a direction away from the coupling part 312 , that is, in a direction opposite to the coupling part 312 . The other side of the ground conductor part 313, the front end in the illustrated embodiment, is connected to the rear end of the ground conductor part 314 so as to be energized. In an embodiment, the front side of the ground conductor part 313 and the rear side of the ground conductor part 314 may be fastened by a screw member.

The ground conductor part 314 connects the ground conductor part 313 and the resistor part 316 to be energized. The ground conductor part 314 is electrically connected to the ground conductor part 313 and the resistor part 316 , respectively.

The ground conductor 314 extends in the longitudinal direction, in the illustrated embodiment, in the front-rear direction. The rear end of the grounding conductor 314 is electrically connected to the grounding conductor 313 . The front end of the grounding wire part 314 is electrically connected to the resistance part 316 .

The sealing part 315 is provided at one side of the body part 311 to which the ground conductor part 314 is exposed to the outside, and at the front end in the illustrated embodiment. The sealing part 315 holds the ground conductive wire part 314 . In addition, the sealing part 315 seals the space so that foreign substances such as dust do not flow into the space inside the body part 311 .

The sealing part 315 is configured to surround the grounding wire part 314 . Accordingly, the ground conductor 314 may move in the longitudinal direction or may not move in the radial direction.

The resistor unit 316 receives power energy stored in the capacitor element (not shown) and serves to discharge the capacitor element (not shown). The resistor unit 316 is electrically connected to the ground conductor unit 314 .

The resistor 316 may be provided in any form capable of receiving power energy and consuming it.

The ground connector 320 electrically connects the capacitor connector 120 and the ground protrusion 330 .

The ground connector 320 is electrically connected to the capacitor connector 120 . Accordingly, the ground connector 320 and the capacitor element (not shown) may be electrically connected.

The ground connector 320 is electrically connected to the ground protrusion 330 . Accordingly, the capacitor element (not shown) and the ground protrusion 330 may be electrically connected.

A plate member forming a predetermined angle with the front-rear direction may be provided on one side of the ground connector 320 facing the valve assembly 200 , that is, on the front side. The ground protrusion 330 may be formed to protrude from the plate member toward the front side in a direction toward the valve assembly 200 . In an embodiment, the predetermined angle may be a right angle.

In the illustrated embodiment, the ground connector 320 is located above the capacitor connector 120 . The ground connector 320 is formed to extend upward from the capacitor connector 120 by a predetermined distance. In one embodiment, the ground connector 320 may be screwed with the capacitor connector 120 .

A residual water collecting unit 960 of the cooling passage 900 may be provided above the ground connector 320 . The ground connector 320 may be configured to support the residual water collection unit 960 .

A plurality of ground connectors 320 may be provided. In the illustrated embodiment, the ground connector 320 includes a first ground connector 321 and a second ground connector 322 . The first ground connector 321 is electrically connected to the first capacitor connector 121 . The second ground connector 322 is electrically connected to the second capacitor connector 122 .

A ground rod unit 310 is inserted and coupled to the ground protrusion 330 . The ground protrusion 330 is formed to protrude a predetermined distance toward the front side in the direction toward the valve assembly 200, in the illustrated embodiment.

The protruding length of the grounding protrusion 330 is preferably determined to correspond to the length of the hollow formed in the grounding conductor 313 .

One side of the grounding protrusion 330 facing the grounding connector 320 , in the illustrated embodiment, the rear side is connected to the grounding connector 320 so as to be energized. In an embodiment, the ground protrusion 330 may protrude from the plate member of the ground connector 320 .

Therefore, when the ground rod unit 310 is inserted and coupled to the ground protrusion 330 , the capacitor element (not shown), the capacitor connector 120 , the ground connector 320 , the ground protrusion 330 , and the ground rod unit 310 are energized. possible to connect

Ground lead 340 ground each electrical device accommodated inside valve assembly 200 (best shown in FIGS. 7 and 8). The grounding wire part 340 electrically connects the respective electrical devices and the valve cart unit 510b of the rail assembly 500 to be energized.

The grounding wire unit 340 includes a PCB grounding wire 341 , a housing grounding wire 342 , and a busbar grounding wire 343 .

The PCB ground lead 341 connects the printed circuit board 280 and the valve cart unit 510b to be energized. The housing grounding wire 342 electrically connects the insulating housing 260 and the valve cart unit 510b. The busbar grounding wire 343 energably connects the output busbar 250 and the valve cart unit 510b.

Accordingly, each electrical device accommodated in the valve assembly 200 can be operated stably.

Hereinafter, a process in which the capacitor element (not shown) is discharged by the ground unit 300 will be described with reference to FIG. 4 again.

In the following description, the direction in which the ground rod unit 310 faces the capacitor assembly 100 is the rear side, and the direction in which the ground rod unit 310 moves away from the capacitor assembly 100, that is, the direction opposite to the capacitor assembly 100 is the front side. It is assumed to be side by side.

First, the ground rod unit 310 is moved to the front side, and passes through the ground rod through hole 412 of the explosion-proof frame part 400 . In this case, the ground rod through-holes 412 are respectively formed on the front side and the rear side, and may be disposed to have the same central axis.

When the ground rod unit 310 that has passed through the ground rod through holes 412 on the front side and the rear side, respectively, continues to move toward the front side, it is inserted and coupled to the ground protrusion 330 from the coupling part 312 . In this case, the ground protrusion 330 may be disposed to have the same central axis as the ground rod through hole 412 .

Accordingly, the shape of the ground rod unit 310 may be stably coupled to the ground protrusion 330 while maintaining a straight shape.

When the ground protrusion 330 is inserted, the coupling part 312 is deformed in shape and the stored restoring force is applied to the ground protrusion 330 . Accordingly, the coupling state between the ground protrusion 330 and the ground rod unit 310 may be stably maintained.

As the insertion of the grounding protrusion 330 proceeds, the front end of the grounding protrusion 330 comes into contact with the grounding conductor 313 . Accordingly, an energized state is formed between the capacitor element (not shown) and the resistor unit 316 , and power energy stored in the capacitor element (not shown) may be released.

5. Description of the explosion-proof frame unit 400 according to an embodiment of the present invention

The sub-module 10 according to an embodiment of the present invention includes an explosion-proof frame unit 400 . The explosion-proof frame unit 400 may accommodate a switching element such as the IGBT 440 therein.

In addition, the explosion-proof frame unit 400 according to the embodiment of the present invention can prevent damage to the adjacent IGBT 440 when the accommodated IGBT 440 explodes. Furthermore, the explosion-proof frame part 400 according to an embodiment of the present invention is formed so that the gas generated by the explosion can be easily discharged.

2 to 4 and 7 to 9 , the explosion-proof frame part 400 may be provided in the valve assembly 200 . This is because the IGBT 440 functioning as a switching element is provided in the valve assembly 200 .

Accordingly, it may be understood that the explosion-proof frame part 400 is included in the valve assembly 200 .

Hereinafter, an explosion-proof frame unit 400 according to an embodiment of the present invention will be described in detail with reference to FIGS. 10 to 12 .

In the illustrated embodiment, the explosion-proof frame unit 400 includes a case unit 410 , a energized busbar 420 , a cooling plate 430 , and an IGBT 440 .

The case unit 410 forms the outer shape of the explosion-proof frame part 400 . A energized bus bar 420 and a cooling plate 430 are coupled to the case unit 410 .

A predetermined space is formed inside the case unit 410 . The IGBT 440 may be accommodated in the space.

The insulating housing 260 may be coupled to one side of the case unit 410 in a direction away from the cooling plate 430 , that is, in a direction opposite to the cooling plate 430 .

A plurality of case units 410 may be provided. In the illustrated embodiment, two case units 410 are provided. Each case unit 410 may be formed in a shape symmetrical to each other. Hereinafter, one case unit 410 will be described, but it will be understood that the other case unit 410 also has the same structure.

Each case unit 410 is coupled to form a predetermined space therebetween. The cooling plate 430 and the IGBT 440 are positioned in the predetermined space.

The output busbar 250 and the energizing busbar 420 are coupled to the outside of the case unit 410 , that is, toward the valve cover 210 . The output busbar 250 and the energizing busbar 420 are positioned between the case unit 410 and the insulating housing 260 .

The cooling plate 430 is coupled to the inner direction of the case unit 410 , that is, the direction in which each case unit 410 faces each other. That is, the cooling plate 430 is positioned between each case unit 410 .

The IGBT 440 is positioned in the inner direction of the case unit 410 , that is, in the direction toward the cooling plate 430 . That is, the IGBT 440 is positioned between the case unit 410 and the cooling plate 430 .

A fastening member (not shown) may be provided for coupling the case unit 410 with the energized busbar 420 , the cooling plate 430 , and the IGBT 440 .

In addition, the case unit 410, the insulating housing 260, and the valve cover part 210 may also be coupled by a fastening member (not shown).

In an embodiment, the fastening member (not shown) may be provided as a screw member.

The case unit 410 may be formed of an insulating material. In addition, the case unit 410 may be formed of a material having heat resistance, pressure resistance, and wear resistance. In one embodiment, the case unit 410 may be formed of a synthetic resin material.

In the illustrated embodiment, the case unit 410 is formed to extend in the vertical direction. This is because, as will be described later, a plurality of IGBTs 440 are provided and disposed in the vertical direction.

The case unit 410 includes a protrusion 411 , a ground rod through hole 412 , an IGBT receiving portion 413 , an inner wall portion 414 , an outer wall portion 415 , an internal communication groove 416 , an external communication groove 417 ). , including a buffer space portion 418 and a corner portion 419 .

The protrusion 411 is formed to protrude from the upper side of the case unit 410 . A plurality of protrusions 411 may be formed. The plurality of protrusions 411 may be formed to be spaced apart from each other by a predetermined distance.

In the illustrated embodiment, the protrusion 411 is formed to protrude upward from the front and rear of the upper side of the case unit 410 . Each of the protrusions 411 may be positioned on the same line in the front-rear direction.

A ground rod through hole 412 is formed through the protrusion 411 .

The ground rod through hole 412 is coupled through the ground rod unit 310 . The ground rod through hole 412 is formed through the protrusion 411 . In the illustrated embodiment, the ground rod through hole 412 is formed through the front and rear directions.

The ground rod through hole 412 may be formed to correspond to the shape of the ground rod unit 310 . In the illustrated embodiment, since the ground rod unit 310 has a cylindrical shape, the ground rod through hole 412 may be formed to have a circular cross section.

As described above, the protrusion 411 may be formed on the front side and the rear side, respectively. The ground rod through hole 412 may be formed through each of the plurality of protrusions 411 .

The ground rod through-holes 412 formed in each protrusion 411 may be formed to have the same central axis. Also, the ground rod through hole 412 may be formed to have the same central axis as the ground protrusion 330 .

The IGBT accommodating unit 413 accommodates the IGBT 440 . The IGBT accommodating part 413 may be defined by a predetermined space formed inside the case unit 410 . The IGBT accommodating part 413 is recessed by a predetermined distance from one side of the case unit 410 facing the cooling plate 430 .

The IGBT accommodating part 413 may be covered by the output busbar 250 and the energizing busbar 420 . Specifically, the opening of one side of the IGBT accommodating part 413 facing the insulating housing 260 may be covered by the output busbar 250 and the energizing busbar 420 .

A plurality of IGBT accommodating units 413 may be formed. In the illustrated embodiment, the IGBT accommodating part 413 is a first IGBT accommodating part 413a formed on one side facing the protrusion 411 and away from the protrusion 411 (that is, the first IGBT accommodating part 413a and and a second IGBT receiving portion 413b formed on the other side (opposite to the protrusion 411 ).

This is due to the fact that two IGBTs 440 are provided, including the first IGBT 441 and the second IGBT 442 . That is, the first IGBT 441 is accommodated in the first IGBT accommodating part 413a, and the second IGBT 442 is accommodated in the second IGBT accommodating part 413b.

As described above, two case units 410 are provided and coupled to each other. It will be understood that two IGBT accommodating portions 413 are formed in one case unit 410 , and a total of four IGBTs 440 are accommodated in each explosion-proof frame portion 400 .

The shape of each IGBT accommodating part 413a, 413b may be determined to correspond to the shape of each IGBT 441 and 442 accommodated therein. In addition, the first IGBT accommodating part 413a and the second IGBT accommodating part 413b may be formed in shapes corresponding to each other.

A partition wall part 413c is formed between the first IGBT accommodating part 413a and the second IGBT accommodating part 413b. When the case unit 410 and the cooling plate 430 are coupled, one side of the partition wall portion 413c facing the cooling plate 430 comes into contact with the cooling plate 430 .

As a result, the partition wall part 413c physically partitions the first IGBT accommodating part 413a and the second IGBT accommodating part 413b from one side facing the cooling plate 430 . Accordingly, even if any one of the first IGBT 413a and the second IGBT 413b explodes, the other one is not affected.

One side of the IGBT accommodating part 413 away from the cooling plate 430 (ie, opposite to the cooling plate 430 ), that is, one side of the IGBT accommodating part 413 facing the energized busbar 420 is formed open. The IGBT 440 is exposed to the outside of the IGBT accommodating part 413 through the one side. The exposed portion of the IGBT 440 is in contact with the energized bus bar 420 .

Meanwhile, the IGBT accommodating portion 413 may be defined as a space surrounded by the partition wall portion 413c , the inner wall portion 414 , and the corner portion 419 .

That is, the first IGBT receiving portion 413a is a first inner wall portion 414a forming the front and rear side walls, a partition wall portion 413c forming a lower wall, and a corner portion 419 forming an upper wall. It can be defined as an enclosed space.

Similarly, the second IGBT receiving portion 413b includes a second inner wall portion 414b forming the front side and rear side walls, a partition wall portion 413c forming the upper wall, and a corner portion 419 forming the lower wall. It can be defined as a space surrounded by

The inner wall portion 414 partially surrounds the IGBT receiving portion 413 . In the illustrated embodiment, the inner wall portion 414 is formed to surround the front side and the rear side of the IGBT receiving portion (413). The inner wall portion 414 may be continuous with the partition wall portion 413c.

The inner wall portion 414 may be surrounded by the outer wall portion 415 . The inner wall portion 414 is spaced apart from the outer wall portion 415 by a predetermined distance. A space formed between the inner wall portion 414 and the outer wall portion 415 by the separation is defined as a buffer space portion 418 .

When the case unit 410 and the cooling plate 430 are coupled, one side of the inner wall portion 414 facing the cooling plate 430 comes into contact with the cooling plate 430 .

An internal communication groove 416 is formed in the inner wall portion 414 . The gas generated by the explosion of the IGBT 440 may be introduced into the buffer space 418 through the internal communication groove 416 .

The inner wall portion 414 includes a first inner wall portion 414a and a second inner wall portion 414b.

The first inner wall portion 414a partially surrounds the first IGBT receiving portion 413a. The first inner wall portion 414a is located on one side facing the protrusion 411, in the illustrated embodiment, on the upper side.

The second inner wall portion 414b partially surrounds the second IGBT receiving portion 413b. The second inner wall portion 414b is located on the other side away from the projection 411 (ie, as opposed to the projection 411 ), in the embodiment shown below.

The outer wall portion 415 partially surrounds the inner wall portion 414 . In the illustrated embodiment, the outer wall portion 415 is formed to surround the front side and the rear side of the inner wall portion 414 . The outer wall portion 415 may be continuous with the corner portion 419 .

The outer wall portion 415 is spaced apart from the inner wall portion 414 by a predetermined distance. A space formed between the outer wall portion 415 and the inner wall portion 414 by the separation is defined as a buffer space portion 418 .

When the case unit 410 and the cooling plate 430 are coupled, one side of the outer wall portion 415 facing the cooling plate 430 comes into contact with the cooling plate 430 .

An external communication groove 417 is formed in the outer wall portion 415 . The gas generated by the explosion of the IGBT 440 may pass through the buffer space 418 and be discharged to the outside of the explosion-proof frame 400 through the external communication groove 417 .

The outer wall portion 415 includes a first outer wall portion 415a and a second outer wall portion 415b.

The first outer wall portion 415a partially surrounds the first inner wall portion 414a and the first buffer space portion 418a. The first outer wall portion 415a is located on one side facing the protrusion 411 , in the illustrated embodiment, on the upper side.

The second outer wall portion 415b partially surrounds the second inner wall portion 414b and the second buffer space portion 418b. The second outer wall portion 415b is located on the other side away from the protrusion 411 (ie, as opposed to the protrusion 411 ) and, in the illustrated embodiment, on the lower side.

The internal communication groove 416 communicates with the IGBT accommodating part 413 and the buffer space part 418 . Gas generated by the explosion of the IGBT 440 may flow from the IGBT accommodating portion 413 to the buffer space 418 through the internal communication groove 416 .

The inner communication groove 416 is formed in the inner wall portion 414 . Specifically, the internal communication groove 416 is recessed by a predetermined distance from one side of the inner wall portion 414 facing the cooling plate 430 .

As described above, when the explosion-proof frame portion 400 is coupled, one side of the inner wall portion 414 facing the cooling plate 430 is in contact with the cooling plate 430 . Accordingly, the IGBT receiving portion 413 may communicate with the buffer space portion 418 only through the internal communication groove 416 .

In the illustrated embodiment, the internal communication groove 416 is formed as a groove having a rectangular cross section extending in the vertical direction, but the shape is deformable.

A plurality of internal communication grooves 416 may be formed. The plurality of internal communication grooves 416 are formed to be spaced apart from each other by a predetermined distance. In the illustrated embodiment, three internal communication grooves 416 are formed for each inner wall portion 414, and are disposed to be spaced apart from each other by a predetermined distance.

In one embodiment, the predetermined distance may be the same as the extension length of the external communication groove (417). Also, the number of internal communication grooves 416 may be changed.

The inner communication groove 416 is disposed to cross the outer communication groove 417 . That is, the imaginary surfaces extending from the inner communication groove 416 and the outer communication groove 417 do not overlap each other. Accordingly, the arc generated by the explosion of the IGBT 440 or the debris generated during the explosion is not discharged to the outside.

In addition, with the arrangement, the generated gas does not pass through the internal communication groove 416 and the external communication groove 417 at once.

The internal communication groove 416 includes a first internal communication groove 416a and a second internal communication groove 416b.

The first inner communication groove 416a is formed in the first inner wall portion 414a. In the illustrated embodiment, the first inner wall portion 414a is formed to surround the first IGBT receiving portion 413a from the front side and the rear side. Accordingly, the first internal communication groove 416a is also formed on the front side and the rear side of the first IGBT receiving portion 413a, respectively.

The second inner communication groove 416b is formed in the second inner wall portion 414b. In the illustrated embodiment, the second inner wall portion 414b is formed to surround the second IGBT receiving portion 413b from the front side and the rear side. Accordingly, the second internal communication groove 416b is also formed on the front side and the rear side of the second IGBT receiving portion 413b, respectively.

The external communication groove 417 communicates with the buffer space 418 and the external space. Gas generated by the explosion of the IGBT 440 may flow from the buffer space 418 to the external space through the external communication groove 417 .

The external communication groove 417 is formed in the outer wall portion 415 . Specifically, the external communication groove 417 is recessed by a predetermined distance from one side of the outer wall portion 415 facing the cooling plate 430 .

As described above, when the explosion-proof frame portion 400 is coupled, one side of the outer wall portion 415 facing the cooling plate 430 is in contact with the cooling plate 430 . Accordingly, the buffer space 418 may communicate with the external space only through the external communication groove 417 .

In the illustrated embodiment, the external communication groove 417 is formed as a groove having a rectangular cross-section formed extending in the vertical direction, but the shape is changeable.

A plurality of external communication grooves 417 may be formed. The plurality of external communication grooves 417 are formed to be spaced apart from each other by a predetermined distance. In the illustrated embodiment, four external communication grooves 417 are formed for each outer wall portion 415, and are arranged to be spaced apart from each other by a predetermined distance.

In an embodiment, the predetermined distance may be equal to the extension length of the internal communication groove 416 . Also, the number of external communication grooves 417 may be changed.

The outer communication groove 417 is disposed to cross the inner communication groove 416 . That is, the virtual surfaces extending from the external communication groove 417 and the internal communication groove 416 do not overlap each other. Accordingly, the arc generated by the explosion of the IGBT 440 or the debris generated during the explosion is not discharged to the outside.

In addition, with the arrangement, the generated gas does not pass through the internal communication groove 416 and the external communication groove 417 at once.

The external communication groove 417 includes a first external communication groove 417a and a second external communication groove 417b.

The first external communication groove 417a is formed in the first external wall portion 415a. In the illustrated embodiment, the first outer wall portion 415a is formed to surround the first inner wall portion 414a and the first buffer space portion 418a from the front side and the rear side. Accordingly, the first external communication groove 417a is also formed on the front side and the rear side of the first buffer space portion 418a, respectively.

The second outer communication groove 417b is formed in the second outer wall portion 415b. In the illustrated embodiment, the second outer wall portion 415b is formed to surround the second inner wall portion 414b and the second buffer space portion 418b from the front side and the rear side. Accordingly, the second external communication groove 417b is also formed on the front side and the rear side of the first buffer space portion 418b, respectively.

The buffer space 418 is a space for accommodating an arc or debris generated as the IGBT 440 explodes. Accordingly, the arc or debris is not discharged to the external space through the external communication groove (417).

In addition, the buffer space 418 is a space in which the gas introduced from the IGBT accommodating part 413 stays before being discharged to the outside. Accordingly, the gas can be discharged after the temperature and pressure are reduced.

The buffer space portion 418 is formed so that the inner wall portion 414 and the outer wall portion 415 are spaced apart from each other by a predetermined distance. The buffer space portion 418 is positioned between the inner wall portion 414 and the outer wall portion 415 . The buffer space 418 is recessed by a predetermined distance from one side of the case unit 410 facing the cooling plate 430 .

In the illustrated embodiment, the inner wall portion 414 and the outer wall portion 415 are respectively formed on the front side and the rear side of the IGBT receiving portion 413 . Accordingly, the buffer space portion 418 is also formed on the front side and the rear side of the IGBT receiving portion 413, respectively.

The front side and the rear side of the buffer space portion 418 are surrounded by the inner wall portion 414 and the outer wall portion 415 . In addition, upper and lower sides of the buffer space portion 418 are respectively surrounded by the fastening member coupling portion.

As described above, when the explosion-proof frame portion 400 is coupled, each side surface of the inner wall portion 414 and the outer wall portion 415 facing the cooling plate 430 is in contact with the cooling plate 430 . In addition, one side of each of the fastening member coupling portions facing the cooling plate 430 is also in contact with the cooling plate 430 .

Accordingly, the buffer space 418 is blocked from communicating with the outside, except for the internal communication groove 416 and the external communication groove 417 .

That is, the buffer space portion 418 is surrounded by the case unit 410 , the partition wall portion 413c , the inner wall portion 414 , the outer wall portion 415 , and the cooling plate 430 .

The buffer space 418 communicates with the IGBT accommodating part 413 . The communication is achieved by an internal communication groove 416 . The buffer space 418 communicates with the external space. The communication is achieved by an external communication groove 417 .

Accordingly, the gas generated in the IGBT accommodating part 413 may be discharged to the external space after the temperature and pressure are reduced in the buffer space part 418 .

The buffer space 418 includes a first buffer space 418a and a second buffer space 418b.

The first buffer space portion 418a is formed between the first inner wall portion 414a and the first outer wall portion 415a. The first buffer space portion 418a is formed on the front side and the rear side of the first inner wall portion 414a, respectively.

The second buffer space portion 418b is formed between the second inner wall portion 414b and the second outer wall portion 415b. The second buffer space portion 418b is formed on the front side and the rear side of the second inner wall portion 414b, respectively.

The corner portion 419 is configured to partially surround the IGBT receiving portion 413 .

Specifically, one side facing the protrusion 411, that is, the corner portion 419 formed on the upper side surrounds the upper side of the first IGBT receiving portion (413a). In addition, the other side away from the protrusion 411 (that is, the other side opposite to the protrusion 411), that is, the corner portion 419 formed on the lower side surrounds the lower side of the second IGBT receiving portion 413b.

The corner portion 419 is formed to protrude from one side of the case unit 410 facing the cooling plate 430 .

When the case unit 410 is coupled to the cooling plate 430 , one side of the corner portion 419 facing the cooling plate 430 comes into contact with the cooling plate 430 . Accordingly, the IGBT accommodating portion 413 may be sealed except for the above-described internal communication groove 416 .

A plurality of grooves recessed by a predetermined distance may be formed in the corner portion 419 . Due to the groove portion, the weight of the entire case unit 410 may be reduced. In addition, the rigidity of the case unit 410 may be reinforced by the groove portion.

A plurality of fastening holes are formed through the corner portion 419 . A fastening member (not shown) may be through-coupled to the fastening hole. Accordingly, each case unit 410 and the cooling plate 430 may be fastened.

The energized busbar 420 transfers the current transmitted to the valve assembly 200 to the capacitor assembly 100 . In addition, the energized bus bar 420 connects the printed circuit board 280 and the IGBT 440 to be energized.

The energizing bus bar 420 is connected to the input bus bar 230 to be energized. Power energy transferred to the input busbar 230 may be transferred to the energized busbar 420 .

The energizing bus bar 420 is connected to the output bus bar 250 to be energized. Power energy transferred to the energized busbar 420 is transferred to the output busbar 250 .

The energized busbar 420 is electrically connected to the printed circuit board 280 and the IGBT 440 , respectively. The control signal calculated by the printed circuit board 280 or the IGBT 440 may be transmitted to other components.

The energized busbar 420 may be coupled to the case unit 410 to cover the IGBT receiving portion 413 together with the output busbar 250 . The energizing bus bar 420 and the output bus bar 250 are connected to be energized.

In the illustrated embodiment, the energized busbar 420 is located on the front side of the output busbar 250 . Accordingly, the energized busbar 420 is configured to cover the front side of the IGBT accommodating portion 413 .

The energized bus bar 420 includes a first energized bus bar 421 and a second energized bus bar 422 .

The first energized busbar 421 is located above the second energized busbar 422 , and is energably connected to the first input busbar 231 and the output busbar 250 . The second energized busbar 422 is located below the first energized busbar 421 , and is energably connected to the second input busbar 232 and the output busbar 250 .

In the illustrated embodiment, the energized busbar 420 is positioned between the case unit 410 and the insulating housing 260 .

The energized bus bar 420 is formed to extend in one direction, in the front-rear direction in the illustrated embodiment. Both ends of the energized bus bar 420 in one direction, that is, a front end and a rear end are bent at a predetermined angle toward the case unit 410 . In an embodiment, the predetermined angle may be a right angle.

Accordingly, when the energized bus bar 420 is coupled to the case unit 410 , the energized bus bar 420 surrounds the front side, left or right side and rear side of the case unit 410 .

The conducting bus bar 420 may be formed of a conducting material. In addition, the energized bus bar 420 may be formed of a material having high rigidity. In an embodiment, the energized bus bar 420 may be formed of a material including iron.

Therefore, even when the IGBT 440 accommodated in the IGBT accommodating part 413 explodes, damage or shape deformation of the case unit 410 can be minimized by the energized busbar 420 surrounding the case unit 410 . .

In an embodiment, the case unit 410 , the energized bus bar 420 , the cooling plate 430 and the insulating housing 260 may be screwed together.

The cooling plate 430 is configured to cool the heat generated as the IGBT 440 is operated. That is, the cooling plate 430 cools the IGBT 440 by exchanging heat with the IGBT 440 .

In the illustrated embodiment, the cooling plate 430 is provided in a rectangular plate shape extending in the vertical direction. The shape of the cooling plate 430 may be any shape that can exchange heat with the IGBT 440 .

The cooling plate 430 is positioned between the two case units 410 . In addition, the cooling plate 430 is positioned between the IGBTs 440 accommodated in each case unit 410 .

In other words, when viewed from the front side, the case unit 410 , the IGBT 440 , the cooling plate 430 , the IGBT 440 and the case unit 410 in the left or right direction or the opposite direction. are placed sequentially.

The cooling plate 430 is in contact with the IGBTs 440 respectively located on the left and right sides, respectively. In one embodiment, the cooling plate 430 and each IGBT 440 may be in surface contact.

The cooling plate 430 communicates with the outside. Specifically, the cooling plate 430 communicates with a cooling flow path part 900 to be described later.

In addition, a predetermined space is formed inside the cooling plate 430 . The cooling fluid supplied from the outside circulates in the space inside the cooling plate 430 and may receive heat from the IGBT 440 . In addition, the cooling fluid to which the heat has been transferred may be discharged to the outside again.

The cooling plate 430 includes an inlet 431 and an outlet 432 .

The inlet 431 communicates with the valve inlet pipe 951 of the cooling flow passage 900 . The low-temperature cooling fluid may be introduced into the inner space of the cooling plate 430 through the inlet 431 .

The outlet 432 communicates with the valve outlet pipe 952 of the cooling flow passage 900 . The cooling fluid heat-exchanged with the IGBT 440 may be discharged from the internal space of the cooling plate 430 through the outlet 432 .

In the illustrated embodiment, the inlet 431 and the outlet 432 are formed through the upper side of the cooling plate 430 . Also, the inlet 431 is located on the rear side of the outlet 432 . The position may be changed.

The IGBT 440 controls the current flowing into or out of the sub-module 10 . In an embodiment, the IGBT 440 may function as a switching element.

The IGBT 440 is accommodated in the IGBT accommodating unit 413 . The IGBT 440 accommodated in the IGBT accommodating portion 413 is sealed by the partition wall portion 413c , the inner wall portion 414 , the corner portion 419 , and the cooling plate 430 .

The IGBT 440 may be in surface contact with the cooling plate 430 . Specifically, the respective surfaces of the cooling plate 430 and the IGBT 440 facing each other may be in contact with each other. Accordingly, heat generated in the IGBT 440 may be transferred to the cooling plate 430 to cool the IGBT 440 .

The IGBT 440 is electrically connected to the energized bus bar 420 . Power energy for operating the IGBT 440 may be transmitted through the energized busbar 420 .

The IGBT 440 is electrically connected to the printed circuit board 280 . The control signal calculated by the printed circuit board 280 may be transmitted to a capacitor element (not shown) or the like through the IGBT 440 .

In addition, the IGBT 440 is a switching operation, so that electricity between the printed circuit board 280 and a device such as a capacitor element (not shown) may be allowed or blocked.

A plurality of IGBTs 440 may be provided. In the illustrated embodiment, the IGBT 440 includes the first IGBT 440 disposed on the upper side in the direction toward the protrusion 411 and the direction away from the protrusion 411 (ie, the first IGBT 440 and the protrusion 411 ). ) and a second IGBT 440 disposed on the lower side).

As described above, two case units 410 may be provided. Accordingly, in the illustrated embodiment, two IGBTs 440 are provided in each case unit 410 on the left and right sides, respectively, and a total of four IGBTs 440 are provided.

As described above, the buffer space portion 418 is formed in the case unit 410 . Arc, gas and debris generated when the IGBT 440 explodes are introduced into the buffer space 418 through the internal communication groove 416 .

Accordingly, the high-temperature and high-pressure arc and gas may be discharged to the external space after the temperature and pressure are lowered.

The external communication groove 417 which communicates the buffer space 418 with the external space is disposed to cross the internal communication groove 416 .

Accordingly, the path from the IGBT accommodating part 413 to the external space through the internal communication groove 416, the buffer space 418 and the external communication groove 417 becomes longer. Accordingly, the arc and gas of high temperature and high pressure are not discharged to the external space immediately after the explosion.

In addition, debris that has passed through the internal communication groove 416 is blocked by the outer wall portion 415 surrounding the buffer space portion 418 . Accordingly, immediately after the explosion, the amount of debris discharged to the external space of the explosion-proof frame unit 400 can be minimized.

6. Description of the rail assembly 500 according to an embodiment of the present invention

The sub-module 10 according to an embodiment of the present invention includes a rail assembly 500 . The rail assembly 500 slidably supports the valve assembly 200 and the capacitor assembly 100 .

In addition, the rail assembly 500 according to the embodiment of the present invention is configured to prevent the valve assembly 200 and the capacitor assembly 100 from being arbitrarily separated.

19 , the rail unit 540 of the rail assembly 500 is coupled to the support 23 . Accordingly, the rail unit 540 may be viewed as a part of the frame 20 .

Hereinafter, a rail assembly 500 according to an embodiment of the present invention will be described in detail with reference to FIGS. 13 to 16 .

In the illustrated embodiment, the rail assembly 500 includes a cart unit 510 , a bracket unit 520 , a fastening unit 530 , and a rail unit 540 .

The cart unit 510 slidably supports the capacitor assembly 100 and the valve assembly 200 . The cart unit 510 supports the capacitor assembly 100 and the valve assembly 200 from the lower side.

The capacitor assembly 100 and the valve assembly 200 may be slid forward or rearward together with the cart unit 510 while seated on the cart unit 510 .

The capacitor assembly 100 and the valve assembly 200 may be respectively coupled to the cart unit 510 by a bracket unit 520 and a separate fastening member (not shown). In an embodiment, the capacitor assembly 100 and the valve assembly 200 may be screwed to the bracket unit 520 .

A plurality of cart units 510 may be provided. A cart unit 510 on which the capacitor assembly 100 is mounted among the plurality of cart units 510 may be referred to as a capacitor cart unit 510a. Also, the cart unit 510 on which the valve assembly 200 is seated may be referred to as a valve cart unit 510b.

The capacitor cart unit 510a and the valve cart unit 510b have similar overall structures and functions. Accordingly, in the following description, the capacitor cart unit 510a and the valve cart unit 510b will be collectively referred to as a cart unit 510 .

The cart unit 510 is slidably coupled to the rail unit 540 . The cart unit 510 may slide to the front side or the rear side along the rail unit 540 .

The cart unit 510 is formed to extend in the direction in which the capacitor assembly 100 and the valve assembly 200 are connected, that is, in the front-rear direction in the illustrated embodiment.

The extended length of the capacitor cart unit 510a may be determined according to the length of the capacitor assembly 100 in the front-rear direction. Likewise, the extended length of the valve cart unit 510b may be determined according to the longitudinal length of the valve assembly 200 . Accordingly, the extension lengths of the capacitor cart unit 510a and the valve cart unit 510b may be different from each other.

The cart unit 510 includes a cart body portion 511 , an extension portion 512 , a round portion 513 , and a wheel portion 514 .

The cart body 511 forms the body of the cart unit 510 . The cart unit 510 is formed to extend by a predetermined length in the front-rear direction. In addition, the cart unit 510 is formed to extend to have a predetermined width in the left and right direction.

In the illustrated embodiment, the cart body 511 is a rectangular plate shape extending in the front-rear direction. The shape of the cart body 511 may be any shape capable of supporting the capacitor assembly 100 or the valve assembly 200 .

13, the right side of the cart body portion 511 is provided with an elastic member coupling portion (511a). The elastic member coupling portion (511a) is formed to protrude by a predetermined distance from the lower surface of the cart body (511).

The cart connection part 631 of the elastic member 630 of the separation prevention part 600 is coupled to the elastic member coupling part 511a. In an embodiment, the elastic member coupling portion 511a may be provided as a screw member.

One side of the cart body portion 511 facing the rail unit 540, an extension portion 512 is provided on the lower side in the illustrated embodiment.

The extension 512 is configured to maintain a distance between the rail unit 540 and the cart body 511 . In addition, a round portion 513 coupled to the rail unit 540 from the extension portion 512 is formed to protrude.

The extension 512 is formed to protrude by a predetermined distance from one side of the cart body 511 facing the rail unit 540 . The extension 512 is formed to extend in the longitudinal direction of the cart body 511, in the illustrated embodiment, in the front-rear direction. The extension 512 may be formed to extend to the same length as the cart body 511 .

A plurality of extension parts 512 are provided. In the illustrated embodiment, the extension 512 is provided on the left and right sides, respectively. Each of the extensions 512 is disposed to be spaced apart from each other by a predetermined distance. The predetermined distance may be formed to be longer than a distance between each end of the rail curved portion 542 of the rail unit 540 .

A round part 513 is formed to protrude from the extension part 512 . In addition, a wheel part 514 is rotatably coupled to the extension part 512 .

The round portion 513 is a portion in which the cart unit 510 is coupled to the rail unit 540 . Specifically, the round portion 513 is inserted and coupled to the space surrounded by the rail curved portion 542 of the rail unit 540 . By the round part 513, the cart unit 510 and the rail unit 540 are not randomly separated.

The round part 513 is formed to protrude by a predetermined distance from one end of the extension 512 toward the rail unit 540, and the lower end in the illustrated embodiment. The round portion 513 is formed to protrude by a predetermined distance in the direction toward the inner, curved rail 542 in the illustrated embodiment. In other words, the round part 513 is formed to protrude by a predetermined distance in a direction away from the wheel part 514 (ie, in a direction opposite to the wheel part 514 ).

The round part 513 is formed to have a circular cross section as a whole. That is, except for the portion where the round portion 513 is connected to the extension portion 512 , the outer surface of the round portion 513 is formed to be rounded toward the rail curved portion 542 .

A plurality of round parts 513 may be formed. In the illustrated embodiment, the round part 513 is provided on the left and right sides, respectively. Each round portion 513 is formed to protrude from each extension portion 512 toward the rail curved portion 542 .

One side of the round part 513 facing the rail curved part 542 in the horizontal direction may contact the third rail curved part 542c of the rail curved part 524 . The distance between each side of each round part 513 may be formed to be longer than the length between the ends of each rail curved part 542 .

The round part 513 is formed to extend in the longitudinal direction of the cart body part 511, in the front-rear direction in the illustrated embodiment. The round part 513 may be formed to have the same length as the cart body part 511 and the extension part 512 .

A cart hollow part 513a is formed inside the round part 513 . Cart hollow portion (513a) is formed through in the longitudinal direction in which the round portion (513) is formed to extend. The blocking fastening member 641 of the separation prevention part 600 to be described later is inserted and fastened to the cart hollow part 513a.

The wheel part 514 is rotated as the cart unit 510 moves, so that the cart unit 510 slides along the rail unit 540 .

The wheel part 514 is rotatably coupled to the extension part 512 . Irrespective of rotation of the wheel portion 514 , the extension portion 512 may remain stationary. For the coupling, a bearing member (not shown) may be provided.

A plurality of wheel parts 514 may be provided. In the illustrated embodiment, two wheel parts 514 are positioned to be spaced apart from each other by a predetermined distance on the left and right sides.

In addition, a plurality of wheel parts 514 may be provided in the left and right directions of the lower end of the cart unit 510 .

Referring again to FIGS. 2 and 4 , the capacitor cart unit 510a is provided with three wheel parts 514 spaced apart from each other at a predetermined distance in the front and rear directions, respectively, in the left and right directions. In addition, the valve cart unit 510b is provided with two wheel parts 514 spaced apart from each other at a predetermined distance in the front-rear direction, respectively, in the left and right directions.

The number of wheel parts 514 provided in the capacitor cart unit 510a and the valve cart unit 510b may be changed.

In the illustrated embodiment, the wheel part 514 has a shape in which a plurality of cylinders having different diameters are continuously coupled. In addition, a hollow part is formed through the inside of the wheel part 514 . A wheel fastening member 532 may be coupled through the hollow portion.

The wheel part 514 includes a wheel body part 514a, a disk part 514b and a cart coupling part 514c.

The wheel body portion 514a forms the body of the wheel portion 514 . The outer peripheral surface of the wheel body portion 514a is seated on the support portion 545 of the rail unit 540 . Rotation of the wheel portion 514 is achieved by relative rotation between the wheel body portion 514a and the support portion 545 .

In the illustrated embodiment, the wheel body portion 514a has a circular cross-section and has a cylindrical shape having a predetermined height. The height of the wheel body 514a, that is, the length in the left-right direction, is preferably formed to be longer than the width of the support part 545, that is, the length in the left-right direction.

That is, when the wheel body part 514a is seated on the support part 545 , a part of the outside of the wheel body part 514a, that is, a direction away from the extension part 512 (ie, a direction opposite to the extension part 512 ). may be exposed to the outside of the rail unit 540 .

Accordingly, the wheel part 514 may be stably seated on the rail unit 540 .

A wheel fastening member 532 is coupled through the outside of the wheel body 514a, that is, on one side of the direction away from the extension 512 (ie, in a direction opposite to the extension 512 ). Accordingly, the wheel part 514 may be coupled to the extension part 512 .

In the illustrated embodiment, a rotation bearing member 620 is provided on one side of the wheel body portion 514a located on the right side. The rotation bearing member 620 enables the stopper member 610 to be rotated, which will be described later, regardless of the rotation of the wheel part 514 . A detailed description thereof will be provided later.

A disk portion 514b is formed on the inner side of the wheel body portion 514a, that is, one side facing the extension portion 512 . The disk portion 514b is formed to protrude from the wheel body portion 514a toward the extension portion 512 by a predetermined length.

The disk portion 514b has a circular cross section and is shaped like a disk having a predetermined height. The disk portion 514b is formed to have a larger diameter than the wheel body portion 514a. The disk portion 514b may be accommodated in the guide space portion 544a positioned below the upper end of the support portion 545 .

The disk portion 514b is formed to have a predetermined thickness in the width direction of the step portion 544 , that is, between the rail extension portion 543 and the support portion 545 . The thickness of the disk portion 514b may be smaller than the length of the width of the step portion 544 , that is, the distance between the respective surfaces of the rail extension portion 543 and the support portion 545 facing each other.

Accordingly, the movement of the wheel part 514 in the left-right direction, that is, in a direction away from the extension part 512 (ie, in a direction opposite to the extension part 512), is due to the contact between the disk part 514b and the support part 545. may be limited by Accordingly, the wheel part 514 is not separated from the rail unit 540 in a direction away from the extension part 512 (ie, in a direction opposite to the extension part 512 ).

The outer peripheral surface of the disk portion 514b may be spaced apart from the upper end of the step portion 544 by a predetermined distance.

A cart coupling portion 514c is formed on the inside of the disk portion 514b, that is, one side facing the extension portion 512 . The cart coupling portion 514c is formed to protrude from the disk portion 514b toward the extension portion 512 by a predetermined length.

The cart coupling portion 514c has a circular cross section and has a disk shape having a predetermined height. The cart coupling portion 514c is formed to have a smaller diameter than the wheel body portion 514a. One side of the cart coupling portion 514c facing the extension portion 512 may be in contact with the extension portion 512 .

The bracket unit 520 couples the capacitor assembly 100 and the valve assembly 200 to the cart unit 510 . The bracket unit 520 is coupled to the upper side of the cart body (511). Specifically, a bracket coupling portion extending in the longitudinal direction of the cart body 511 is formed in the center of the left-right direction on the upper side of the cart body portion 511 is recessed.

The bracket unit 520 is coupled to the cart body 511 through the bracket coupling part. The coupling may be a screw coupling or the like.

The bracket unit 520 includes a horizontal portion 521 and a vertical portion 522 . The horizontal part 521 forms a predetermined angle with the cart body part 511 and is formed to extend in the longitudinal direction of the cart body part 511 . In one embodiment, the horizontal portion 521 may be parallel to the cart body portion (511).

The vertical portion 522 forms a predetermined angle with the horizontal portion 521 and is formed to protrude from the horizontal portion 521 . In an embodiment, the predetermined angle may be a right angle.

A plurality of through-holes are formed in the vertical portion 522 (see FIG. 11 ). A fastening member (not shown) for fastening the case unit 410 is inserted and coupled to the through hole. Accordingly, the valve assembly 200 may be coupled to the valve cart unit 510b.

Although not shown, a fastening member (not shown) for fastening the capacitor housing 110 of the capacitor assembly 100 to the vertical portion 522 may be provided. Accordingly, the capacitor assembly 100 may be coupled to the capacitor cart unit 510a.

The fastening unit 530 fastens each component of the cart unit 510 to the cart body 511 . In one embodiment, the fastening unit 530 may be provided with a screw member.

The fastening unit 530 includes a lever fastening member 531 and a wheel fastening member 532 .

The lever fastening member 531 fastens the lever coupling member 720 of the installation separation unit 700 to the cart body unit 511 . In the illustrated embodiment, the lever fastening member 531 fastens the lever coupling member 720 positioned on the front side of the cart body 511 .

A plurality of lever fastening members 531 may be provided. The lever fastening members 531 may be disposed to be spaced apart from each other by a predetermined distance in the width direction of the lever coupling member 720 , that is, in the left and right directions.

The wheel fastening member 532 rotatably fastens the wheel part 514 to the extension part 512 . In the illustrated embodiment, the wheel fastening member 532 engages the extension 512 in an outward direction of the wheel portion 514 , that is, in a direction away from the extension 512 (ie, in a direction opposite to the extension 512 ). It is through-coupled to the wheel part 514 in the direction it faces. The inner side of the wheel fastening member 532 , that is, one end facing the extension 512 may be rotatably fastened to the extension 512 .

A plurality of wheel fastening members 532 may be provided. This is due to the plurality of wheel parts 514 being provided as described above.

The rail unit 540 is configured to guide the front-rear direction of the cart unit 510 . The cart unit 510 is slidably coupled to the rail unit 540 .

The rail unit 540 is formed to extend in one direction, the front-rear direction in the illustrated embodiment. This may correspond to the extension direction of the cart unit 510 .

The rail unit 540 is preferably formed of a material having sufficient rigidity to support the high-weight capacitor assembly 100 and the valve assembly 200 .

A plurality of rail units 540 may be provided. Referring back to FIG. 1 , six rail units 540 are provided on the support 23 . The plurality of rail units 540 are disposed to be spaced apart from each other by a predetermined distance in the left and right directions. The number of rail units 540 may be changed.

The blocking plate 640 of the separation preventing unit 600 may be coupled to both ends of the rail unit 540 in the longitudinal direction. The departure prevention unit 600 may limit the movement of the front side and the rear side of the cart unit 510 coupled to the rail unit 540 . Accordingly, a situation in which the cart unit 510 is arbitrarily separated from the rail unit 540 and is dropped can be prevented.

In the illustrated embodiment, the rail unit 540 includes a rail body portion 541 , a rail curved portion 542 , a rail extension portion 543 , a step portion 544 , and a support portion 545 .

The rail body portion 541 forms the body of the rail unit 540 . The rail body 541 is disposed to face the cart body 511 .

The rail body 541 may be disposed to form a predetermined angle with the cart body 511 . In one embodiment, the rail body portion 541 may be disposed parallel to the cart body portion (511).

The rail body 541 is formed to extend in one direction, in the front-rear direction in the illustrated embodiment. It is preferable that the extension length of the rail body 541 is longer than the sum of the extension lengths of the capacitor cart unit 510a and the valve cart unit 510b.

One side of the rail body portion 541, the front side in the illustrated embodiment, the lever insertion groove 730 is recessed is formed.

Outside of the rail body portion 541, the rail curved portion 542 at each end in the left and right direction in the illustrated embodiment is formed to protrude toward the cart body portion (511).

The rail curved portion 542 is a portion to which the round portion 513 is slidably coupled. The rail curved portion 542 is formed such that the round portion 513 partially covers one side facing the cart body portion 511, that is, the upper side. Accordingly, the round portion 513 coupled to the rail curved portion 542 is not removed in the upward direction.

That is, due to the shape of the rail curved portion 542 and the round portion 513 , the cart unit 510 must be slid from the front side or the rear side to be coupled to the rail unit 540 . Similarly, due to the shape of the rail curved portion 542 and the round portion 513, the cart unit 510 and the rail unit 540 are not arbitrarily separated.

Rail curved portion 542 is formed to extend in one direction, the front-rear direction in the illustrated embodiment. The extension length of the rail curved part 542 may be the same as the extension length of the rail body part 541 .

A plurality of rail curved portions 542 may be formed. The plurality of rail curved portions 542 are disposed to be spaced apart from each other by a predetermined distance. Each rail curve 542 is positioned adjacent to each round 513 .

Each rail curved portion 542 is located inside each round portion 513, in the illustrated embodiment, in a direction toward the center portion of the rail body portion 541 in which the lever insertion groove 730 is formed.

Each rail curved portion 542 is formed to be convex in the direction toward each other. In other words, each rail curved portion 542 is formed to be rounded in a direction away from the round portion 513 (ie, in a direction opposite to the round portion 513 ). In one embodiment, the rail curved portion 542 may have a “C” shape in which the cross-sections are formed to be convex toward each other.

It will be understood that the shape of the rail curved portion 542 corresponds to the shape of the round portion 513 .

Accordingly, the rail curved portion 542 is formed to surround the lower side, the inner side (that is, each side of the round portion 513 facing each other) and the upper side of the round portion 513.

Rail curve 542 includes a first rail curve 542a, a second rail curve 542b, a third rail curve 542c, a side limiter 542d, and a top surface limiter 542e.

The first rail curved portion 542a is formed to protrude from one end of the rail body portion 541 toward the cart body portion 511 . Specifically, the first rail curved portion 542a is formed to protrude from the end at which the rail body portion 541 and the rail extension portion 543 are connected.

The first rail curved portion 542a is formed to be convex toward the other first rail curved portion 542a. In other words, the first rail curved portion 542a is formed to be rounded in a direction away from the round portion 513 (ie, in a direction opposite to the round portion 513 ).

One end of the first rail curved portion 542a facing the cart body portion 511, the second rail curved portion 524b is formed to protrude from the upper end in the illustrated embodiment.

The second rail curved portion 542b is formed to be convex toward the other second rail curved portion 542b. In other words, the second rail curved portion 542b is formed to be rounded in a direction away from the round portion 513 (ie, in a direction opposite to the round portion 513 ). A degree to which the second rail curved portion 542b is curved may be determined according to a degree to which the first rail curved portion 542a is curved. In an embodiment, the second rail curved portion 542b may be curved with the same curvature as the first rail curved portion 542a.

A third rail curved portion 542c is formed protruding from one end of the second rail curved portion 542b facing the cart body 511, and the upper end in the illustrated embodiment.

The third rail curved portion 542c is formed to be convex toward the cart body portion 511 . In other words, the third rail curved portion 542c is formed to be rounded in a direction away from the round portion 513 (ie, in a direction opposite to the round portion 513 ).

In one embodiment, the third rail curved portion 542c may be formed to be convex toward the center portion of the cart body portion 511 in the left-right direction. In the above embodiment, the third rail curved portion 542c is convex toward the inner direction of the upper side (ie, the direction in which the different rail curved portions 542 face each other).

The third rail curved portion 542c may be formed to partially cover the upper side of the round portion 513 . In one embodiment, the third rail curved portion 542c may extend toward the extension portion 512 . That is, the end of the third rail curved portion 542c is positioned between the round portion 513 and the cart body portion 511 .

A side limiting portion 542d is formed to protrude in an outer direction of the second rail curved portion 542b, that is, in a direction toward the round portion 513 .

The side limiting portion 542d is formed to be rounded in an outward direction, in a direction toward the round portion 513 in the illustrated embodiment. That is, the side limiting portion 542d is formed to be convex in the opposite direction to the first or second rail curved portions 542a and 542b.

The side limiting portion 542d is a first portion extending toward the round portion 513, continuous with the first portion and contacting or spaced apart from the round portion 513, and forming a predetermined angle with the surface of the round portion 513, and a second portion that extends and a third portion that is continuous with the second portion and extends away from the round portion 513 (ie, opposite to the round portion 513 ).

In an embodiment, the second portion of the side limiting portion 542d may extend parallel to one side of the round portion 513 facing the rail curved portion 542 .

In another embodiment, the second portion of the side limiting part 542d, that is, one side of the side limiting part 542d facing the round part 513 is in the direction away from the round part 513 (ie, the round part). (direction opposite to 513) may be formed concavely. In addition, the round portion 513 may be formed to be convex toward the second portion of the side limiting portion 542d.

That is, the second portion of the side limiting portion 542d may be formed to be rounded in the same direction as the round portion 513 .

The second portion of the side limiting portion 542d may be in contact with one side of the round portion 513 facing the rail curved portion 542 . Accordingly, the distance at which the wheel part 514 moves toward the rail curved part 542 may be limited.

The upper surface limiting portion 542e is formed to protrude in an outer direction of the third rail curved portion 542c, that is, in a direction toward the round portion 513 . The upper limiting portion 542e is formed to be rounded in the outward direction.

That is, the upper surface limiting portion 542e is convex in a direction different from that of the third rail curved portion 542c.

In one embodiment, one side of the upper surface limiting portion 542e facing the round portion 513 is concave in a direction away from the round portion 513 (ie, opposite to the round portion 513). can be In addition, the round portion 513 may be formed to be convex toward the one side of the upper surface limiting portion 542e.

That is, the one side of the upper surface limiting part 542e may be formed to be rounded in the same direction as the round part 513 .

The upper surface limiting portion 542e may be in contact with or spaced apart from one side of the extended portion 512 or the round portion 513 facing the rail curved portion 542 . Accordingly, a distance at which the wheel part 514 moves upward in the rail unit 540 may be limited.

The rail extension portion 543 is formed to extend from both ends in the horizontal direction of each rail body portion 541, left or right end in the illustrated embodiment. The rail extension portion 543 is formed to extend at a predetermined angle with the rail body portion 541 . In one embodiment, the rail extension portion 543 may extend in parallel with the rail body portion 541 .

The rail extension portion 543 is extended so that an end in an outward direction, that is, a direction away from the rail body portion 541 (ie, a direction opposite to the rail body portion 541), is located directly below the extension portion 512 . can That is, the end of the rail extension portion 543 in the outward direction may be positioned more outward than the end of the third rail curved portion 542c.

The rail extension 543 is formed to have a predetermined thickness. It is preferable that the upper surface of the rail extension 543 , that is, one side facing the round portion 513 do not contact the round portion 513 . This is to prevent the rail extension 543 from being damaged by the movement of the cart unit 510 .

A fastening hole 543a is formed through the inside of the rail extension 543 . The fastening hole 543a is formed to penetrate in one direction in which the rail unit 540 extends, in the illustrated embodiment, in the front-rear direction.

The blocking fastening member 641 of the separation preventing part 600 is fastened to the fastening hole 543a. In one embodiment, the blocking fastening member 641 may be screwed to the fastening hole 543a.

The step portion 544 is formed to extend from one end of the outer end of the rail extension 543 , that is, in a direction away from the rail body 541 (ie, in a direction opposite to the rail body 541 ). The step portion 544 is formed to extend at a predetermined angle with the rail extension portion 543 . In an embodiment, the stepped portion 544 may extend parallel to the rail extension 543 .

The stepped portion 544 may extend to be positioned directly below the disk portion 514b of the wheel portion 514 . One side of the stepped portion 544 facing the disk portion 514b, in the illustrated embodiment, the upper surface is spaced apart from the outer peripheral surface of the disk portion 514b by a predetermined distance.

That is, when the wheel part 514 is rotated, the upper surface of the step part 544 does not come into contact with the disk part 514b. Accordingly, even when the wheel part 514 is rotated, the step part 544 is not damaged.

An end of the step portion 544 in an outer direction, that is, an end in a direction away from the rail extension portion 543 (ie, a direction opposite to the rail extension portion 543) extends to be located below the wheel body portion 514a. can be That is, the end of the stepped portion 544 is positioned further outward than the disk portion 514b, ie, farther away from the rail extension 543 (ie, farther away from the rail extension 543 ).

The step portion 544 is formed to have a lower height than the rail extension portion 543 . That is, the shortest distance between the upper surface of the step 544 and the cart body 511 is longer than the shortest distance between the upper surface of the rail extension 543 and the cart body 511 .

In other words, the shortest distance between the upper surface of the stepped portion 544 and the capacitor assembly 100 or the valve assembly 200 is the upper surface of the rail extension 543 and the capacitor assembly 100 or the valve assembly 200 . longer than the shortest distance between

In addition, the step portion 544 is formed to have a lower height than the support portion (545). That is, the shortest distance between the upper surface of the step 544 and the cart body 511 is longer than the shortest distance between the upper surface of the support 545 and the cart body 511 .

In other words, the shortest distance between the upper surface of the stepped portion 544 and the capacitor assembly 100 or the valve assembly 200 is between the upper surface of the support portion 545 and the capacitor assembly 100 or the valve assembly 200 . longer than the shortest distance.

Accordingly, a space is formed on the upper side of the step portion 544 , surrounded by the surfaces of the rail extension portion 543 and the support portion 545 facing each other. The space is defined by a guide space portion 544a.

The guide space portion 544a is a space into which the disk portion 514b of the wheel portion 514 is inserted. The guide space 544a limits the movement distance in the left and right directions of the disk part 514b so that the wheel part 514 can be rotated while seated on the support part 545 .

At this time, the length (left-right direction in the illustrated embodiment) of the guide space portion 544a in the width direction is formed to be greater than the thickness of the disk portion (514b). In other words, the length at which the step portion 544 extends between the rail extension portion 543 and the support portion 545 is formed to be longer than the width of the disk portion 514b.

Accordingly, the disk part 514b may be moved in a direction toward the rail extension part 543 or the support part 545 while being inserted into the guide space part 544a.

At this time, as described above, the guide space portion 544a is defined surrounded by the upper surface of the step portion 544 and the surface where the rail extension portion 543 and the support portion 545 face each other.

That is, the space in the inner direction of the guide space portion 544a, that is, the space in the direction toward the rail curved portion 542 is partitioned by the surface of the rail extension portion 543 in the outer direction, that is, in the direction toward the step portion 544 .

In addition, the outer direction of the guide space portion 544a, that is, the space in the direction toward the support portion 545 is partitioned by the inner direction of the support portion 545, that is, the surface in the direction toward the step portion 544.

Accordingly, the moving distance in the inward direction of the disk portion 514b inserted into the guide space 544a is limited by the outward surface of the rail extension 543 . In addition, the moving distance in the outward direction of the disk part 514b is limited by the inward surface of the support part 545 .

Accordingly, the wheel portion 514 does not deviate in the inner or outer direction of the rail unit 540 , that is, in the left and right direction in the illustrated embodiment.

The support portion 545 supports the wheel body portion 514a of the wheel portion 514 . The wheel body part 514a is seated on the support part 545 . The upper surface of the support part 545 may be in contact with the outer peripheral surface of the wheel body part 514a.

The support portion 545 is formed to extend from an end of the step portion 544 in an outer direction, that is, an end in a direction away from the rail extension portion 543 (ie, a direction opposite to the rail extension portion 543 ). The support part 545 may extend so that an end in the outward direction is positioned directly below the wheel body part 514a.

The upper surface of the support part 545 , that is, the surface in contact with the wheel body part 514a may be formed as a flat surface.

Accordingly, the support 545 can stably support the load of the cart unit 510 and the capacitor assembly 100 and the valve assembly 200 seated thereon. In addition, when the wheel part 514 rolls on the upper surface of the support part 545 and moves, it can move stably.

The support portion 545 is formed to have a higher height than the step portion 544 . That is, the shortest distance between the upper surface of the support 545 and the cart body 511 is shorter than the shortest distance between the upper surface of the step 544 and the cart body 511 .

In other words, the shortest distance between the upper surface of the stepped portion 544 and the capacitor assembly 100 or the valve assembly 200 is between the upper surface of the support portion 545 and the capacitor assembly 100 or the valve assembly 200 . longer than the shortest distance.

The difference between the height of the support part 545 and the height of the step part 544 may be determined according to the difference between the diameter of the wheel body part 514a and the diameter of the disk part 514b. That is, the difference between the height of the support part 545 and the height of the step part 544 may be determined to be greater than the difference between the diameter of the wheel body part 514a and the diameter of the disk part 514b.

Accordingly, even when the wheel body portion 514a is seated on the support portion 545 , the disk portion 514b does not come into contact with the step portion 544 .

The support 545 is formed to have a lower height than the rail extension 543 . That is, the shortest distance between the upper surface of the support 545 and the cart body 511 is longer than the shortest distance between the upper surface of the rail extension 543 and the cart body 511 .

In other words, the shortest distance between the upper surface of the support 545 and the capacitor assembly 100 or the valve assembly 200 is between the upper surface of the rail extension 543 and the capacitor assembly 100 or the valve assembly 200 . longer than the shortest distance of

As described above, the cart unit 510 has a round portion 513 is formed. When the cart unit 510 is slidably coupled to the rail unit 540, the round part 513 has its lower side, the inner side (the direction in which each round unit 513 faces each other) and the upper side of the rail unit 540. It is arranged to be wrapped around the rail curved portion 542 of the.

Accordingly, the cart unit 510 is not separated from the rail unit 540 in the upward direction.

In addition, the rail unit 540 is formed with a guide space portion 544a that is a space surrounded by the rail extension portion 543 , the step portion 544 , and the support portion 545 . The disk portion 514b of the wheel portion 514 is inserted into the guide space portion 544a.

Accordingly, a movement distance of the wheel portion 514 in a direction away from the rail curved portion 542 (ie, a direction opposite to the rail curved portion 542 ) or toward the rail curved portion 542 is limited. Accordingly, the cart unit 510 is not separated from the rail unit 540 in the left or right direction.

7. Description of the departure prevention unit 600 according to an embodiment of the present invention

The sub-module 10 according to an embodiment of the present invention includes a departure prevention unit 600 . The separation prevention unit 600 prevents the cart unit 510 slidably coupled to the rail unit 540 from being arbitrarily separated.

Hereinafter, the separation preventing unit 600 according to an embodiment of the present invention will be described in detail with reference to FIGS. 13 to 16 .

In the illustrated embodiment, the separation preventing unit 600 includes a stopper member 610 , a rotation bearing member 620 , an elastic member 630 , a blocking plate 640 , and a stop groove 650 .

The stopper member 610 limits the distance the cart unit 510 is moved to the front side. By the stopper member 610 , the cart unit 510 is not arbitrarily separated from the rail unit 540 through the front side of the rail unit 540 .

The stopper member 610 may be provided on any one or more of the left and right wheel parts 514 of the cart unit 510 . In the illustrated embodiment, the stopper member 610 is provided on the left wheel portion 514 of the cart unit 510 . Alternatively, the stopper member 610 may be provided on the right wheel portion 514 of the cart unit 510 .

Furthermore, a plurality of stopper members 610 may be provided, respectively, to the left and right wheel parts 514 .

The stopper member 610 is rotatably coupled to the wheel part 514 . The stopper member 610 may not rotate regardless of the rotation of the wheel part 514 . Similarly, the stopper member 610 may be rotated regardless of the stationary state of the wheel part 514 .

The stopper member 610 is inserted into the stop groove 650 formed in the rail unit 540 . One side of the inserted stopper member 610 , in the illustrated embodiment, the front side is in contact with the first surface 651 of the stop groove 650 . Accordingly, the stopper member 610 and the cart unit 510 to which the stopper member 610 is connected is no longer moved to the front side.

The stopper member 610 may be moved above the support 545 . Specifically, one side of the stopper member 610 facing the front side may be moved together with the cart unit 510 while in contact with the upper surface of the support 545 .

The stopper member 610 is connected to the elastic member 630 . The elastic member 630 provides an elastic force so that the one side of the stopper member 610 can be maintained in contact with the support part 545 . The stopper member 610 may be formed of a material having high rigidity. In an embodiment, the stopper member 610 may be formed of an iron (Fe) material.

The stopper member 610 includes a stopper body part 611 , a locking plate 612 , a wheel coupling part 613 , and an elastic member coupling hole 614 .

The stopper body 611 is formed to extend in one direction. In one embodiment, the stopper body portion 611 may be formed to extend in the same direction as the support portion (545).

One side of the stopper body portion 611, a locking plate 612 is formed on the front end in the illustrated embodiment. A wheel coupling part 613 is formed through the center of the stopper body 611 . In addition, an elastic member coupling hole 614 is formed through the other side of the stopper body 611, the rear side in the illustrated embodiment.

The stopper body 611 is disposed such that the front end faces downward and the rear end faces upward. This is due to the fact that the elastic member 630 coupled to the elastic member coupling hole 614 is pulling in a direction in which the rear end of the stopper body 611 is pulled, counterclockwise in the embodiment shown in FIG. 15 .

Accordingly, the front end of the stopper body 611 may be maintained in contact with the upper surface of the support 545 .

A locking plate 612 is provided at the front end of the stopper body 611 .

The locking plate 612 is a portion in which the stopper member 610 is in contact with each surface of the stop groove 650 . When the locking plate 612 comes into contact with the first surface 651 or the second surface 652 of the stop groove 650 , the cart unit 510 is no longer moved to the front side.

The locking plate 612 is formed to extend from the front end of the stopper body 611 . The locking plate 612 may be formed to extend at a predetermined angle with the stopper body 611 . In an embodiment, the locking plate 612 may extend vertically with respect to the stopper body 611 .

In the illustrated embodiment, the locking plate 612 is formed to protrude from the front end of the stopper body 611 in an inward direction, that is, a direction toward the round portion 513 by a predetermined distance. In an embodiment, the locking plate 612 may be formed to extend so that one end of the locking plate 612 facing in the inner direction is positioned above the stepped portion 544 .

When the stopper body 611 is inserted into the stop groove 650 , the locking plate 612 comes into contact with the first surface 651 or the second surface 652 . Accordingly, the cart unit 510 to which the stopper member 610 is rotatably coupled is no longer moved to the front side.

A wheel fastening member 532 is fastened to the wheel coupling part 613 . The stopper member 610 is rotatably coupled to the cart unit 510 by the wheel fastening member 532 .

The wheel coupling part 613 may be formed through the stopper body part 611 . The center of the wheel coupling part 613 may be formed coaxially with the center of the wheel part 514 .

The elastic member coupling hole 614 is located on one side of the rear side of the stopper body 611, a direction away from the stop groove 650 in the illustrated embodiment (ie, the direction opposite to the stop groove 650). . The elastic member coupling hole 614 may be biased toward the upper side of the stopper body 611 .

One end of the elastic member 630 is coupled to the elastic member coupling hole 614 . The one end of the elastic member 630 may be rotated while being inserted into the elastic member coupling hole 614 .

The rotation bearing member 620 couples the stopper member 610 to the wheel part 514 to maintain a stationary state or to be rotatable regardless of the rotation of the wheel part 514 . The rotating bearing member 620 is positioned between the stopper member 610 and the wheel part 514 .

The elastic member 630 applies an elastic force to the stopper member 610 . The elastic member 630 applies an elastic force in a direction toward the cart body 511 to the rear end of the stopper member 610 . In the illustrated embodiment, the elastic member 630 applies a counterclockwise elastic force to the stopper member 610 .

Accordingly, the rear end of the stopper member 610 can be maintained in a direction toward the cart body portion 511, pulled upward in the illustrated embodiment.

The elastic member 630 is deformed in shape and may be provided in any shape capable of storing restoring force. In an embodiment, the elastic member 630 may be provided as a coil spring.

The elastic member 630 includes a cart connection part 631 and a stopper connection part 632 . In one embodiment, the cart connection portion 631 and the stopper connection portion 632 may be provided in the form of a hook (hook).

The cart connection part 631 is located at the front side end of the elastic member 630 . The cart connection part 631 is connected to the elastic member coupling part 511a.

The stopper connection part 632 is located at the rear side end of the elastic member 630 . The stopper connection part 632 is rotatably coupled to the elastic member coupling hole 614 .

Accordingly, the elastic member 630 may be stretched or contracted between the elastic member coupling portion 511a and the elastic member coupling hole 614 .

By the elastic member 630, the stopper member 610 may be maintained in a state in which the front end is inclined downward and the rear end is inclined upward.

Also, when the stopper member 610 enters the stop groove 650 , the elastic member 630 applies a counterclockwise restoring force to the stopper member 610 . Accordingly, when the stopper member 610 is spaced apart from the stop groove 650 , the front end of the stopper member 610 may return to a state in contact with the upper surface of the support part 545 .

The blocking plate 640 closes the front side of the rail unit 540 . Also, the blocking plate 640 may close the rear side of the rail unit 540 (see FIGS. 20A and 20B ). The blocking plate 640 may be provided to prevent the cart unit 510 from being arbitrarily separated from the rail unit 540 when the sub-module 10 needs to be moved.

The blocking plate 640 may be coupled to the rail unit 540 to cover a portion of the rail body portion 541 , the rail extension portion 543 , and the step portion 544 . In addition, the blocking plate 640 may be coupled to the cart unit 510 to cover a portion of the round portion 513 .

The blocking plate 640 may be coupled to the cart unit 510 and the rail unit 540 by a blocking fastening member 641 . In one embodiment, the blocking fastening member 641 may be provided as a screw member.

A plurality of blocking fastening members 641 may be provided. In the illustrated embodiment, four blocking fastening members 641 are provided. The blocking fastening member 641 may be fastened to the cart hollow part 513a and the fastening hole 543a.

The front end of the stopper member 610 is inserted into the stop groove 650 . Specifically, the locking plate 612 and the front end of the stopper body 611 to which the locking plate 612 is connected are inserted into the stop groove 650 .

A stop groove 650 is formed in the support 545 . Specifically, the stop groove 650 is formed on the front side of the support 545 .

The position of the stop groove 650 is preferably formed at a position where the cart unit 510 may not be arbitrarily separated from the rail unit 540 when the front end of the stopper member 610 is inserted.

In one embodiment, the stop groove 650 is when the locking plate 612 and the first surface 651 of the stop groove 650 are in contact, the front end of the cart unit 510 and the rail unit 540 of The front side end may be formed at a position positioned on the same vertical line.

A plurality of stop grooves 650 may be formed. The plurality of stop grooves 650 are arranged to be spaced apart from each other by a predetermined distance in the front-rear direction, that is, along the direction in which the rail unit 540 is extended.

A stop groove 650 formed on the front side of the plurality of stop grooves 650 may limit the moving distance of the valve cart unit (510b). In addition, the stop groove 650 formed on the rear side of the plurality of stop grooves 650 may limit the moving distance of the capacitor cart unit (510a).

The stop groove 650 is recessed by a predetermined length from the upper surface of the support part 545 . The degree of depression of the stop groove 650 may be formed differently along the longitudinal direction of the support part 545 .

In the illustrated embodiment, the stop groove 650 is formed with a more gentle rear side slope than the front side slope. Accordingly, the stopper member 610 moving together with the cart unit 510 may enter the stop groove 650 along the rear inclination. In addition, the entered stopper member 610 can no longer be moved to the front side by the front side.

The stop groove 650 includes a first face 651 and a second face 652 .

The first surface 651 is a portion in contact with the locking plate 612 of the stopper member 610 inserted into the stop groove 650 . The first surface 651 may be defined as a front side surface of the stop groove 650 which is recessed in the upper surface of the support part 545 .

In other words, the first surface 651 is located adjacent to one side of the extending direction of the rail unit 540, the front end in the illustrated embodiment. The first surface 651 is formed to surround the one side of the stop groove 650 , the front side in the illustrated embodiment.

The first surface 651 is formed to extend at a predetermined angle with the upper surface of the support part 545 . The predetermined angle may be greater than an angle between the second surface 652 and the upper surface of the support part 545 . In an embodiment, the predetermined angle may be a right angle.

The rear side end of the first side 651 is continuous with the front side end of the second side 652 .

The second surface 652 is a portion through which the locking plate 612 of the stopper member 610 moves toward the first surface 651 . The locking plate 612 may be moved toward the first surface 651 while the lower end thereof is in contact with the second surface 652 .

The second surface 652 may be defined as a rear side surface of the stop groove 650 which is recessed in the upper surface of the support part 545 . The first surface 651 and the second surface 652 are continuous.

In other words, the second surface 652 extends in one side of the direction in which the rail unit 540 extends, in a direction away from the front end in the illustrated embodiment (ie, in a direction opposite to the front end). That is, the second surface 652 is disposed to be farther from the end of the one side (ie, the front side) of the rail unit 540 than the first surface 651 . That is, the second surface 652 is located on the rear side of the first surface 651 .

The second surface 652 is formed to extend at a predetermined angle with the upper surface of the support part 545 . The predetermined angle may be formed to be smaller than an angle between the first surface 651 and the upper surface of the support part 545 . In an embodiment, the predetermined angle may be an acute angle.

The rear end of the second surface 652 is formed to extend with the upper surface of the support 545 .

Accordingly, the locking plate 612 may be moved to the front side or the rear side along the second surface 652 . On the other hand, when the locking plate 612 is in contact with the first surface 651, the locking plate 612 is no longer moved to the front side.

Accordingly, the stopper member 610 and the stopper member 610 are rotatably connected to the front side movement distance of the cart unit 510 can be limited.

As described above, the front end of the stopper member 610 is moved to the front side or the rear side together with the cart unit 510 in a state in contact with the upper surface of the support portion (545). When the front end of the stopper member 610 reaches the stop groove 650 , the front end of the stopper member 610 is rotated and moved downward along the second surface 652 .

When the front end of the stopper member 610 comes into contact with the first surface 651 , the stopper member 610 is no longer moved to the front side due to the shape of the first surface 651 . Accordingly, the cart unit 510 connected to the stopper member 610 is also not moved to the front side. Accordingly, the moving distance of the front side of the cart unit 510 may be limited.

In this case, a case in which the sub-module 10 needs to be withdrawn from the frame 20 for the purpose of maintenance or the like may be considered. The capacitor assembly 100 and the valve assembly 200 constituting the sub-module 10 are mounted on the cart unit 510 . Therefore, the process in which the cart unit 510 is separated from the rail unit 540 should be preceded.

As described above, when the front end of the stopper member 610 comes into contact with the first surface 651 of the stop groove 650 , the stopper member 610 is no longer moved to the front side.

Accordingly, the stopper member 610 is rotated by being pressed and discharged from the stop groove 650 .

Specifically, an end of the end of the stopper member 610 that is not in contact with the first surface 651 , in the illustrated embodiment, an end of the rear side is pressed. Accordingly, the end of the stopper member 610 in contact with the first surface 651, that is, the front side end is in the direction away from the first surface 651 (ie, the direction opposite to the first surface 651), shown In the illustrated embodiment, it is rotated clockwise and discharged from the stop groove 650 .

Next, the cart unit 510 is slid toward one end of the rail unit 540 by an external force, the front end in the illustrated embodiment.

At this time, the end of the rail unit 540 is closed by the blocking plate (640). Accordingly, when the blocking fastening member 641 is released, the blocking plate 640 is separated from the rail unit 540 .

Then, the installation separation unit 700 to be described later may be utilized to separate the cart unit 510 from the rail unit 540 .

Accordingly, it is not arbitrarily separated from the rail unit 540 of the cart unit 510 . Accordingly, a safety accident due to any departure of the cart unit 510 can be prevented.

Conversely, when the stopper member 610 is moved to the rear side, the front end of the stopper member 610 is moved to the rear side while in contact with the second surface 652 . As described above, the second surface 652 may form an acute angle with the upper surface of the support part 545 . In addition, the rear side end of the second surface 652 is continuous with the upper surface of the support portion 545 .

Accordingly, when the stopper member 610 is moved to the rear side, it can be moved easily unlike when it is moved to the front side.

In addition, a blocking plate 640 may be provided at the front side end and the rear side end of the rail unit 540 . The blocking plate 640 is fastened to the cart unit 510 and the rail unit 540, respectively. Accordingly, the front side and the rear side of the cart unit 510 are blocked by the blocking plate (640).

Accordingly, the cart unit 510 by the blocking plate 640 is not arbitrarily separated from the rail unit (540). This may be utilized in a situation in which the sub-module 10 is moved or the movement of the cart unit 510 is to be restricted.

8. Description of the installation and separation unit 700 according to an embodiment of the present invention

The sub-module 10 according to an embodiment of the present invention includes an installation and separation unit 700 . By the installation and separation unit 700 , the cart unit 510 on which the capacitor assembly 100 or the valve assembly 200 is seated can be easily coupled to or removed from the rail unit 540 .

Hereinafter, the installation and separation unit 700 according to an embodiment of the present invention will be described in detail with reference to FIGS. 17 and 18 .

In the illustrated embodiment, the installation separation unit 700 includes a lever member 710 , a lever coupling member 720 , and a lever insertion groove 730 .

The lever member 710 is inserted and coupled to the lever coupling member 720 and the lever insertion groove 730 . A user can easily couple the cart unit 510 to the rail unit 540 using the lever member 710 . In addition, the user can easily remove the cart unit 510 from the rail unit 540 using the lever member 710 .

The lever member 710 may function as a lever. That is, the lever member 710 may use the lever insertion groove 730 as an axis to pull the lever coupling member 720 to the front side or push it to the rear side.

The lever member 710 may be provided together with the sub-module 10 . To this end, a member (not shown) for mounting the lever member 710 may be provided on the frame 20 .

The lever member 710 may be provided separately from the sub module 10 . When the sub-module 10 needs to be separated from the frame 20 , the user may separate the sub-module 10 by bringing the lever member 710 .

The lever member 710 includes an extension 711 and a handle 712 .

The extension 711 is a portion coupled to the lever coupling member 720 and the lever insertion groove 730 . The extension portion 711 is formed to extend from one end of the handle portion 712 .

The extension 711 may be formed of a material having high rigidity. In an embodiment, the extension 711 may be formed of an iron material.

The extension 711 includes a first extension 711a and a second extension 711b.

The first extension portion 711a is a portion directly coupled to the lever coupling member 720 and the lever insertion groove 730 . One end of the first extension 711a is connected to the second extension 711b.

The second extension portion 711b is positioned between the first extension portion 711a and the handle portion 712 . The second extension portion 711b is respectively connected to the first extension portion 711a and the handle portion 712 .

The second extension portion 711b is formed to extend at a predetermined angle with the first extension portion 711a. In an embodiment, the predetermined angle may be a right angle.

The second extension portion 711b is formed to extend at a predetermined angle with the handle portion 712 . In one embodiment, the second extension portion 711b may extend parallel to the handle portion 712 . In addition, a central axis in a direction in which the second extension portion 711b extends may be the same as a central axis in a direction in which the handle portion 712 extends.

The handle portion 712 is a portion where the user grips the lever member 710 . The handle portion 712 is formed to extend from one side of the second extension portion 711b in a direction away from the first extension portion 711a (ie, in a direction opposite to the first extension portion 711a). The handle portion 712 is continuous with the second extension portion 711b.

The handle portion 712 extends a predetermined distance in a direction away from the second extension portion 711b (ie, in a direction opposite to the second extension portion 711b). In an embodiment, the extended length of the handle portion 712 and the extended length of the second extended portion 711b may be the same.

A grip member may be provided on the outer circumferential surface of the handle portion 712 to facilitate the user. The grip member is configured to increase the frictional force between the handle portion 712 and the palm gripping the handle portion 712 . In an embodiment, the grip member may be formed of a rubber material.

A lever member 710 is coupled to the lever coupling member 720 . By pushing or pulling the lever member 710 , the user may move the cart unit 510 to which the lever coupling member 720 and the lever coupling member 720 are coupled to the front side or the rear side.

The lever coupling member 720 is coupled to the cart unit 510 . Specifically, the lever engaging member 720 is located on the lower side of the front side of the cart body (511). The lever coupling member 720 may be coupled to the cart body 511 by the lever coupling member 531 (see FIG. 13 ).

The lever coupling member 720 is formed to protrude a predetermined distance toward the front side in the direction away from the cart unit 510 (ie, the direction opposite to the cart unit 510), in the illustrated embodiment. By the protrusion, the user can easily identify the lever engaging member 720 .

The lever coupling member 720 may be formed of a material having high rigidity. In one embodiment, the lever coupling member 720 may be formed of an iron material. Accordingly, even when pressure is applied by the lever member 710 formed of a material having rigidity, deformation of the shape of the lever coupling member 720 may be minimized.

The lever coupling member 720 includes a lever insertion hole 721 .

The lever insertion hole 721 is formed through the inside of the lever coupling member 720 . The first extension portion 711a of the lever member 710 is inserted through the lever insertion hole 721 . The first extension 711a may pass through the lever insertion hole 721 and extend to the lever insertion groove 730 .

In the illustrated embodiment, the lever insertion hole 721 is formed to have a rectangular cross section. This is because the area in which the first extension 711a contacts the lever coupling member 720 is flat. The shape of the lever insertion hole 721 may be changed to correspond to the shape of the first extension 711a.

The length in the front-rear direction of the lever insertion hole 721 is preferably formed to be longer than the thickness of the first extension portion 711a. Accordingly, the first extension portion 711a may be inserted into the first lever insertion groove 731 or the second lever insertion groove 732 while being penetrated through the lever insertion hole 721 .

The center of the lever insertion hole 721 may be located on the same plane or on the same line as the centers of the first lever insertion groove 731 and the second lever insertion groove 732 .

The lever insertion groove 730 is a space into which the end of the first extension 711a passing through the lever insertion hole 721 is inserted. When the user pulls or pushes the handle 712 while the end of the first extension 711a is inserted into the lever insertion groove 730, the cart unit 510 may be moved to the front side or the rear side.

The lever insertion groove 730 is formed in the rail body 541 . Specifically, the lever insertion groove 730 is recessed by a predetermined distance from the front side of the upper surface of the rail body 541 .

A plurality of lever insertion grooves 730 may be formed. In the illustrated embodiment, two lever insertion grooves 730 are formed. Of the two lever insertion grooves 730, the lever insertion groove 730 formed on the front side is the first lever insertion groove 731, and the lever insertion groove 730 located on the rear side is the second lever insertion groove ( 732), respectively.

The first lever insertion groove 731 is located on the front side of the rail body 541 . Specifically, the first lever insertion groove 731 is located at the front end of the rail body 541 . That is, the first lever insertion groove 731 is formed by being depressed by a predetermined distance in the upper and front surfaces of the rail body 541 .

An end of the first extension portion 711a is inserted into the first lever insertion groove 731 . The end of the inserted first extension portion 711a is directed away from the rear side of the first lever insertion groove 731 , that is, from the open side of the rail body 541 (that is, the direction opposite to the open side) ) is in contact with the

In addition, an end of the inserted first extension portion 711a is also in contact with the lower surface of the first lever insertion groove 731 . The lever member 710 may function as a lever by using the above surfaces as “full points”.

The lever member 710 is inserted in the first lever insertion groove 731 in a counterclockwise direction, that is, the handle 712 moves away from the cart unit 510 (ie, the direction opposite to the cart unit 510). ) can be rotated. Accordingly, the first extension (711a) is in contact with the end of the lever coupling member 720 located on the rear side of the front side end of the cart unit 510 or the lever insertion hole (721).

The end of the cart unit 510 or the end of the lever engagement member 720 may serve as a “point of action”. That is, it is a point at which the force applied to the lever member 710 is applied. It will be appreciated that the handle portion 712 functions as a “force point”.

A second lever insertion groove 732 is formed on the rear side of the first lever insertion groove 731 .

The second lever insertion groove 732 is located on the front side of the rail body 541 . Specifically, the second lever insertion groove 732 is formed to be spaced apart from the first lever insertion groove 731 formed at the front end of the rail body 541 by a predetermined distance to the rear side. The second lever insertion groove 732 is formed by being depressed by a predetermined distance from the upper surface of the rail body 541 .

An end of the first extension 711a is inserted into the second lever insertion groove 732 . The end of the inserted first extension portion 711a is on the rear side of the second lever insertion groove 732 , that is, in a direction away from the first lever insertion groove 731 (ie, opposite to the first lever insertion groove 731 ). direction) is in contact.

In addition, an end of the inserted first extension portion 711a is also in contact with the lower surface of the second lever insertion groove 732 . The lever member 710 may function as a lever by using the above surfaces as “full points”.

The lever member 710 may press the cart unit 510 in a state coupled to the lever coupling member 720 and the lever insertion groove 730, respectively. That is, the lever member 710 presses the cart unit 510 toward one of the directions in which the rail unit 540 extends, that is, the other direction among the front side or the direction in which the rail unit 540 extends, that is, the rear side. can do.

Specifically, the lever member 710 may be rotated in a clockwise direction, that is, in a direction in which the handle portion 712 approaches the cart unit 510 in a state inserted into the second lever insertion groove 732 . Accordingly, the second extension portion 711b is in contact with the front end of the cart unit 510 or the end of the lever coupling member 720 disposed on the rear side of the lever insertion hole 721 .

The end of the cart unit 510 or the end of the lever engagement member 720 may serve as a “point of action”. That is, it is a point at which the force applied to the lever member 710 is applied. It will be appreciated that the handle portion 712 functions as a “force point”.

As described above, the extension 711 of the lever member 710 may be through-coupled to the lever insertion hole 721 of the lever coupling member 720 . In addition, an end of the first extension portion 711a may be inserted into the first lever insertion groove 731 or the second lever insertion groove 732 .

17 shows the cart unit 510 and the first lever insertion groove in which the lever member 710 is inserted in order to withdraw the capacitor assembly 100 or the valve assembly 200 seated in the cart unit 510 from the rail unit 540 . The state inserted at 731 is shown.

When the user rotates the handle 712 in a direction away from the cart unit 510 (ie, in a direction opposite to the cart unit 510), that is, counterclockwise, the front side of the first extension 711a presses the end positioned on the front side of the lever insertion hole 721 .

Accordingly, the cart unit 510 to which the lever coupling member 720 is connected is moved to the front side, and the cart unit 510 may be slid off the rail unit 540 . It will be understood that the stopper member 610 must be discharged from the stop groove 650 before the above process is performed.

18 shows the cart unit 510 and the second lever insertion groove in which the lever member 710 is inserted in order to couple the capacitor assembly 100 or the valve assembly 200 seated on the cart unit 510 to the rail unit 540 . The state inserted at 732 is shown.

When the user rotates the handle 712 in the direction approaching the cart unit 510, that is, clockwise, the rear side of the first extension 711a is an end located on the rear side of the lever insertion hole 721 pressurize

Accordingly, the cart unit 510 to which the lever coupling member 720 is connected is moved to the rear side, and the cart unit 510 may be slidably coupled to the rail unit 540 .

Accordingly, the coupling and separation process between the heavy cart unit 510 and the rail unit 540 can be easily performed.

9. Description of the short circuit adjusting unit 800 according to an embodiment of the present invention

The sub-module 10 according to an embodiment of the present invention includes a short circuit adjusting unit 800 . The short circuit adjusting unit 800 is configured to simultaneously short-circuit or ground each of the capacitor elements (not shown) accommodated in the plurality of capacitor assemblies 100 by a simple operation.

Hereinafter, the short circuit adjusting unit 800 according to an embodiment of the present invention will be described in detail with reference to FIGS. 19 to 21 . In the illustrated embodiment, the short-circuit adjustment unit 800 is installed on the frame 20 . Accordingly, it may be said that the short circuit adjusting unit 800 is included in the frame 20 .

However, since the function of the short circuit adjusting unit 800 is to short-circuit the plurality of sub-modules 10 , it is assumed that the short-circuit adjusting unit 800 is included in the sub-module 10 in the following description.

In the illustrated embodiment, the shorting adjustment unit 800 includes a moving member 810 , a shorting block 820 , a variable connector 830 , a link member 840 , and an indicator member 850 .

The moving member 810 is configured to simultaneously move the plurality of variable connectors 830 .

The moving member 810 is slidably coupled to the frame 20 . Specifically, the moving member 810 is slidably coupled to the rear side of the support 23 positioned at the rearmost side.

The moving member 810 is connected to the variable connector 830 . When the movable member 810 slides, the variable connector 830 may also slide along with the movable member 810 .

The moving member 810 is connected to the link member 840 . The moving member 810 may slide to the left or right according to the movement of the link member 840 .

The moving member 810 is formed to extend in one direction. In the illustrated embodiment, the moving member 810 is formed to extend in the left and right direction like the extending direction of the support portion (23). The extended length of the moving member 810 may be shorter than the extended length of the support part 23 .

The moving member 810 includes an extended body portion 811 and an end insertion groove 812 .

The extended body portion 811 forms the body of the moving member 810 . The extended body portion 811 is formed to extend in the longitudinal direction of the moving member 810 .

The extended body portion 811 may be inserted between the grooves formed in the shorting block 820 . That is, in the illustrated embodiment, the extended body portion 811 is inserted into a groove formed in the central portion of the shorting block 820 spaced apart from each other by a predetermined distance in the longitudinal direction.

Accordingly, the extended body portion 811 is positioned between the movable member support portions 822 of the shorting block 820 . Further, the extended body portion 811 is configured to cover the portion of the shorting block 820 positioned between the movable member supports 822 .

The extended body portion 811 may be moved in a left or right direction while being inserted into the groove. The movement is achieved by the movable member support 822 provided on the upper and lower sides of the shorting block 820 .

An end insertion groove 812 is formed through the extended body portion 811 . A fastening member is provided in the extended body portion 811 adjacent to the end of the end insertion groove 812 . The fastening member fastens the variable connector 830 to the extension body portion 811 .

Both ends of the variable connector 830 in the longitudinal direction are inserted into the end insertion groove 812 . The both ends of the variable connector 830 inserted into the end insertion groove 812 may pass through the end insertion groove 812 to contact the portion of the shorting block 820 .

According to the sliding movement of the moving member 810 , it may contact the shorting block 820 or may be spaced apart from the shorting block 820 .

The end insertion groove 812 is formed through the extended body portion 811 . The extended body portion 811 is formed to extend by a predetermined length in the extending direction.

The predetermined length of the end insertion groove 812 may be longer than the width direction length of the shorting block 820 , that is, the left and right direction length. Accordingly, the end of the variable connector 830 passing through the end insertion groove 812 may contact or be spaced apart from the shorting block 820 .

A plurality of end insertion grooves 812 may be formed. A plurality of end insertion grooves 812 are formed to be spaced apart from each other by a predetermined distance. The predetermined distance may be shorter than a distance at which the short blocks 820 are spaced apart from each other.

A variable connector 830 is partially penetrated through the end insertion groove 812 . Specifically, the first connector end 831 and the second connector end 832 of the variable connector 830 are respectively formed through the end insertion groove 812 .

In other words, the first connector end 831 and the second connector end 832 may pass through the end insertion groove 812 to contact or be spaced apart from the shorting block 820 .

The shorting block 820 is electrically contacted or spaced apart from the variable connector 830 .

When only one end of the variable connector 830 is in contact with the shorting block 820 , the voltage of each sub-module 10 may be maintained differently. When both ends of the variable connector 830 are in contact with the shorting block 820 , each sub-module 10 is short-circuited with each other, so that the voltage of each sub-module 10 may be changed in the same manner.

The shorting block 820 may be formed of a conductive material. In an embodiment, the shorting block 820 may be formed of an aluminum (Al) or iron (Fe) material.

The shorting block 820 is formed to extend in one direction. In the illustrated embodiment, the shorting block 820 is formed to extend in the vertical direction. That is, the shorting block 820 and the moving member 810 are extended to form a predetermined angle with each other.

A movable member support 822 is provided at upper and lower sides of the shorting block 820 . A space into which the extended body part 811 is inserted is formed between the movable member support parts 822 .

A contact portion 823 protruding in a direction away from the support portion 23 (ie, in a direction opposite to the support portion 23) is formed in the space.

A plurality of shorting blocks 820 are provided. The plurality of shorting blocks 820 are disposed to be spaced apart from each other by a predetermined distance. The predetermined distance may be formed to be longer than the distance at which the end insertion grooves 812 are spaced apart from each other.

The shorting block 820 is formed to extend in one direction, in the illustrated embodiment, in the vertical direction. The shorting block 820 may have a rectangular cross-section. That is, the shorting block 820 may be formed in a quadrangular prism shape.

In the illustrated embodiment, the cross section of the shorting block 820 has one corner coupled to the frame 20 as the base, and the other corner facing the one corner, that is, the other corner opposite to the frame 20 as the upper side. has a trapezoidal shape.

In other words, the length of the moving member 810 of one surface coupled to the frame 20 among the surfaces of the shorting block 820 in the extending direction (ie, the left-right direction) is the one surface of the shorting block 820 . The length of the moving member 810 of the other surface facing the extending direction (ie, the left-right direction) is longer than the length.

Each side of the shorting blocks 820 positioned adjacent to each other facing each other may be formed to be inclined. In an embodiment, each side may extend at an acute angle with respect to one side (ie, the front side) of the shorting block 820 to which each shorting block 820 is coupled to the frame 20 .

That is, each side of the adjacent shorting blocks 820 facing each other is formed to be inclined in a direction away from the frame 20 . In other words, the surfaces of the shorting blocks 820 adjacent to each other facing each other are inclined to move away from each other in a direction toward the moving member 810 .

That is, in the illustrated embodiment, the distance between the surfaces facing each other along the direction toward the rear side may increase as the distance from the frame 20 increases.

Due to the above shape of the shorting block 820 , the first connector end 831 and the second connector end 832 of the flexible connector 830 are in contact with the face (ie, the inclined face) of the shorting block 820 . and can easily come into contact with the shorting block 820 .

In addition, the first connector end 831 and the second connector end 832 of the variable connector 830 are the other side of the shorting block 820 along the side (ie, the inclined side) of the shorting block 820 . (that is, the surface that is spaced apart from the frame 20 and faces the frame 20) can be easily entered.

Accordingly, the shorting block 820 and the variable connector 830 may be in elastic contact without a separate elastic member. That is, the variable connector 830 comes into contact with the shorting block 820 while applying an elastic force in a direction toward the shorting frame 20 to the shorting block 820 . A detailed description thereof will be provided later.

The shorting block 820 includes a shorting conductor 821 , a moving member support 822 , and a contact 823 .

The shorting conductor 821 connects the blocking plate 640 and the variable connector 830 to be energized. One end of the shorting conductor 821 is electrically connected to the blocking plate 640 . The other end of the shorting conductor 821 is electrically connected to the variable connector 830 .

Accordingly, the rail unit 540 and the capacitor assembly 100 that are in energizable contact with the blocking plate 640 may be energized with the variable connector 830 .

That is, the variable connector 830 may be electrically connected to external electronic equipment.

Although the description has been made on the assumption that the external electronic device is the capacitor assembly 100 accommodating the capacitor element (not shown) therein, the short circuit adjusting unit 800 according to an embodiment of the present invention may be any electronic device requiring a short circuit. It will be understood that the device may be applied.

A plurality of shorting conductors 821 may be provided. Each of the plurality of shorting conductors 821 is electrically connected to the plurality of blocking plates 640 and the plurality of variable connectors 830 , respectively.

The movable member support 822 supports the movable member 810 to be slidably movable while the movable member 810 is inserted into the shorting block 820 .

The movable member support 822 may be rotatably coupled to the shorting block 820 . When the moving member 810 slides in the left or right direction, the moving member support 822 may also be rotated.

A plurality of movable member supporters 822 may be provided. In the illustrated embodiment, two movable member supporters 822 are provided, respectively, located above and below the shorting block 820 .

The movable member support 822 is continuous with the first portion 822a and the first portion 822a in contact with the shorting block 820 , and in a direction away from the shorting block 820 (ie, opposite to the shorting block 820 ). and a second portion 822b positioned in the direction of

A diameter of the first portion 822a may be smaller than a diameter of the second portion 822b. In addition, the first part 822a is formed to protrude by a predetermined length from one side of the shorting block 820 in a direction away from the support part 23 (ie, in a direction opposite to the support part 23 ). The length may be greater than or equal to the thickness of the movable member 810 .

Accordingly, a predetermined space is formed between the one side surface of the shorting block 820 and the second portion 822b. The upper and lower ends of the movable member 810 may be inserted into the predetermined spaces formed at the upper and lower sides, respectively.

The contact portion 823 is a portion to which the respective ends 831 and 832 of the variable connector 830 are in contact. The contact portion 823 is positioned between the plurality of movable member supports 822 .

The contact part 823 is formed to protrude by a predetermined length in a direction away from the support part 23 (ie, in a direction opposite to the support part 23 ). Accordingly, the respective ends 831 and 832 of the variable connector 830 may easily contact the contact portion 823 .

Each end of the contact portion 823 in the width direction, that is, in the left and right direction in the illustrated embodiment, may be inclined in a direction toward the support portion 23 . That is, the respective ends of the contact portion 823 may be configured such that the protruding length in the direction toward each other is increased.

Accordingly, each of the ends 831 and 832 of the variable connector 830 may easily enter the inside of the contact portion 823 . In addition, each of the ends 831 and 832 of the variable connector 830 may be easily detached to the outside of the contact portion 823 .

The variable connector 830 establishes or releases an energized state between the different shorting blocks 820 . The variable connector 830 is configured to be in contact with or spaced apart from any one or more of the plurality of shorting blocks 820 adjacent to each other.

The variable connector 830 may be formed of a conductive material. In an embodiment, the variable connector 830 may be formed of a copper (Cu) material.

The variable connector 830 may be provided in an elastic form. In an embodiment, the variable connector 830 may be provided in the form of a leaf spring.

Accordingly, the first connector end 831 and the second connector end 832 may be elastically deformed when in contact with the contact portion 823 . Accordingly, a contact state between the first connector end 831 and the second connector end 832 and the contact portion 823 may be stably maintained.

Also, when the first connector end 831 and the second connector end 832 are spaced apart from the contact portion 823 , they are elastically deformed and may return to their original shape by the stored restoring force.

Specifically, the first connector end 831 and the second connector end 832 store elastic force through a predetermined shape deformation when moving along the inclined surface of the shorting block 820 .

At this time, the shorting block 820 is formed in a trapezoidal shape. Therefore, as each connector end (831, 832) is moved toward the side facing the frame (20) (that is, the side between the sides inclined on both sides), the elastic force stored in each connector end (831, 832) size is increased

When each connector end (831, 832) is moved along the surface (ie, inclined surface) of the shorting block 820 and enters the other surface of the shorting block 820, each connector end (831, 832) and The shortest distance between short blocks 820 is further reduced. Accordingly, the magnitude of the elastic force stored in each of the connector ends 831 and 832 becomes the maximum.

Accordingly, the variable connector 830 is deformed in shape and comes into contact with the shorting block 820 in a state in which the elastic force is stored, and may be moved in one direction (ie, the left-right direction) in which the movable member 810 extends.

Accordingly, even if a separate elastic member is not provided, contact reliability between the variable connector 830 and the shorting block 820 may be improved.

The variable connector 830 is coupled to the moving member 810 . The variable connector 830 may slide in a left and right direction together with the moving member 810 .

The variable connector 830 may have any one of a first position in energably contacting any one or more of the shorting blocks 820 positioned adjacent to each other and a second position spaced apart from both of the shorting blocks 820 positioned adjacent to each other. can be located in

In other words, the variable connector 830 contacts all of the two shorting blocks 820 positioned adjacent to each other, only in contact with one of the shorting blocks 820 , or comes in contact with both of the two shorting blocks 820 . it may not be

The variable connector 830 is electrically connected to the shorting conductor 821 . Accordingly, the variable connector 830 is electrically connected to the blocking plate 640 .

The variable connector 830 is formed to extend by a predetermined length in the direction in which the movable member 810 extends, and in the left-right direction in the illustrated embodiment. The extended length of the variable connector 830 is preferably determined according to the distance at which the shorting blocks 820 are spaced apart.

Specifically, the extended length of the variable connector 830 is preferably formed to be greater than or equal to the distance between the ends of the contact portions 823 of the shorting blocks 820 adjacent to each other facing each other.

That is, in the embodiment shown in FIG. 20B , the extended length of the variable connector 830 is one end of the shorting block 820 to which the first connector end 831 of the variable connector 830 is in contact, and the second connector It is preferable that the end 832 is formed to be greater than or equal to the distance between the ends of one side of the shorting block 820 in contact.

Accordingly, when the moving member 810 slides, the first connector end 831 and the second connector end 832 of the variable connector 830 may be electrically connected to different shorting blocks 820 , respectively. Accordingly, different sub-modules 10 may be short-circuited at the same time.

The variable connector 830 includes a first connector end 831 and a second connector end 832 .

The first connector end 831 is defined as one end of the variable connector 830 in the longitudinal direction. In the illustrated embodiment, the first connector end 831 is located on the left side of the variable connector 830 . The first connector end 831 is bent toward the contact portion 823 .

The second connector end 832 is defined as the other end in the longitudinal direction of the variable connector 830 . In the illustrated embodiment, the second connector end 832 is located on the right side of the variable connector 830 . The second connector end 832 is located opposite the first connector end 831 . The second connector end 832 is bent toward the contact portion 823 .

The first connector end 831 and the second connector end 832 are positioned therebetween and are respectively continuous with portions extending in the one direction (ie, the left-right direction).

The first connector end 831 and the second connector end 832 may extend toward the frame 20 at an angle with respect to the portion. In an embodiment, the first connector end 831 and the second connector end 832 may extend at an obtuse angle with the portion.

Accordingly, in the illustrated embodiment, when viewed from above, the cross-section of the variable connector 830 has the first connector end 831 and the second connector end 832 as hypotenuse, and the portion of the variable connector 830 is defined as the hypotenuse. It is the shape of the part of the trapezoid used as the base.

The first connector end 831 and the second connector end 832 may be spaced apart from the frame 20 . Also, the first connector end 831 and the second connector end 832 may extend to contact the shorting block 820 .

In other words, the first connector end 831 and the second connector end 832 do not come into contact with the frame 20 , but may extend to such an extent that they can contact the shorting block 820 .

Accordingly, when the variable connector 830 is moved in the one direction (ie, the left-right direction), each of the connector ends 831 and 832 comes into contact with the inclined surface of the shorting block 820 and elastically deforms in the one direction. can be moved

Accordingly, when the variable connector 830 comes into contact with the shorting block 820 , the variable connector 830 is deformed in shape and moved while storing the elastic force. That is, the variable connector 830 and the shorting block 820 are in elastic contact.

In addition, one side of the first connector end 831 and the second connector end 832 facing the frame 20, in the illustrated embodiment, the front side may be formed to be rounded.

Accordingly, when the moving member 810 is moved in one direction (ie, the left-right direction), the first connector end 831 and the second connector end 832 are easily attached to the inclined surface of the shorting block 820 . will be able to enter.

As a result, a contact pressure greater than or equal to a certain level may be secured between the variable connector 830 and the shorting block 820 . Accordingly, the reliability of the contact between the variable connector 830 and the shorting block 820 may be guaranteed.

The first connector end 831 and the second connector end 832 may be respectively inserted through the end insertion groove 812 .

The first connector end 831 is inserted through any one of the end insertion grooves 812 , and is in contact with the contact portion 823 of any one shorting block 820 .

The second connector end 832 is inserted through the other end insertion groove 812 to be in contact with the contact portion 823 of the other shorting block 820 .

It will be understood that the one end insertion groove 812 and the other end insertion groove 812 into which the first connector end 831 and the second connector end 832 are respectively inserted are disposed adjacent to each other. will be.

Similarly, it is understood that the one shorting block 820 and the other shorting block 820 to which the first connector end 831 and the second connector end 832 are respectively in energably contact are also disposed adjacent to each other. will be

That is, the variable connector 830 slides between the shorting blocks 820 adjacent to each other, and may simultaneously energize at least one of the adjacent shorting blocks 820 .

In the embodiment shown in FIG. 20A , the variable connector 830 is in energized contact with only one of the shorting blocks 820 adjacent to each other. That is, the second connector end 832 is in contact with any one of the shorting blocks 820 , and the first connector end 831 does not contact the shorting block 820 .

In this state, the plurality of sub-modules 10 are not short-circuited with each other. Accordingly, the capacitor elements (not shown) provided in the plurality of sub-modules 10 may maintain different voltages.

In the embodiment shown in FIG. 20B , the variable connector 830 is electrically in contact with each of the shorting blocks 820 adjacent to each other. That is, the second connector end 832 maintains a state of being in contact with any one of the shorting blocks 820 , and the first connector end 831 is energably in contact with the other of the shorting blocks 820 adjacent to each other. do.

Although not shown, the variable connector 830 may be spaced apart from all of the shorting blocks 820 adjacent to each other as described above.

Accordingly, each shorting block 820 is energized through the variable connector 830 . Similarly, a capacitor element (not shown) of each sub-module 10 that is respectively energably connected to each short-circuit block 820 is also energized.

In this state, the plurality of sub-modules 10 and the plurality of sub-modules 10 are short-circuited to each other. Accordingly, the capacitor elements (not shown) provided in the plurality of sub-modules 10 may be changed to the same voltage. In an embodiment, the state may be a ground state.

The link member 840 is connected to the moving member 810 to convert the rotational motion of the short-circuit adjusting lever 854 into a linear motion of the moving member 810 . The link member 840 is respectively connected to the moving member 810 and the short-circuit adjusting lever 854 .

The link member 840 may be provided in any form capable of converting a rotational motion into a linear motion or converting a linear motion into a rotational motion. In an embodiment, the link member 840 may be provided as a 2-section link or a 3-section link.

The link member 840 includes a rotation shaft portion 841 , a first link 842 , and a second link 843 .

The rotation shaft portion 841 transmits the rotational movement of the short-circuit adjustment lever 854 to the first link 842 . The rotating shaft portion 841 is connected to the short-circuit adjustment lever 854 and the first link 842 . The rotation shaft portion 841 may be rotated together with the short-circuit adjustment lever 854 and the first link 842 .

In the illustrated embodiment, the rotating shaft portion 841 is disposed to be spaced apart from the vertical frame 21 by a predetermined distance. In one embodiment, the rotation shaft portion 841 may be formed to extend in the vertical direction, that is, perpendicular to the ground.

The rotation shaft portion 841 may be maintained perpendicular to the ground while being spaced apart from the vertical frame 21 by a predetermined distance by a supporting member.

An insulating member 24 may be provided below the rotation shaft portion 841 . The insulating member 24 may be configured to surround the outside of the rotation shaft portion 841 adjacent to the indicator member 850 . Accordingly, a safety accident due to high pressure that may occur when the user operates the indicator member 850 may be prevented.

The first link 842 transmits the rotational motion of the rotary shaft portion 841 to the second link 843 .

The first link 842 is formed to extend in one direction. One side of the first link 842 in the extending direction is connected to the rotation shaft portion 841 . In one embodiment, the first link 842 may be coupled through the rotation shaft portion (841). The first link 842 may be rotated together with the rotation shaft portion 841 .

The other side of the first link 842 is rotatably coupled to the second link 843 . When the first link 842 is rotated, the second link 843 may be linearly moved.

The second link 843 converts the rotational motion of the first link 842 into a linear motion and transmits it to the moving member 810 .

The second link 843 is formed to extend in one direction. In the illustrated embodiment, the second link 843 is formed to extend in the left-right direction.

One side of the second link 843 in the extending direction is rotatably coupled to the first link 842 . When the first link 842 is rotated, the second link 843 linearly moves in a direction toward the moving member 810 or away from the moving member 810 (ie, in a direction opposite to the moving member 810 ). can be

The other side in the extending direction of the second link 843 is coupled to the moving member 810 . When the second link 843 moves linearly, the moving member 810 also moves away from the second link 843 (ie, in a direction opposite to the second link 843 ) or in a direction toward the second link 843 . can be moved in a straight line.

The indicator member 850 is operated by a user. The user may operate the short-circuit adjustment lever 854 to short-circuit the plurality of sub-modules 10 to the same voltage or release the short-circuit state.

The indicator member 850 is positioned adjacent to the insulating member 24 provided below the rotation shaft portion 841 . Accordingly, an accident in which a user approaching the indicator member 850 is electrocuted may be prevented.

The indicator member 850 includes an indicator housing 851 , a first display portion 852 , a second display portion 853 , a short-circuit adjustment lever 854 , and a pin member 855 .

The indicator housing 851 forms the body of the indicator member 850 . In the illustrated embodiment, the indicator housing 851 has a central portion in the width direction recessed. That is, when viewed from above, the indicator housing 851 may have a “C” shape.

The indicator housing 851 may be disposed to be spaced apart from the sub-module 10 . Accordingly, even if the user does not approach the sub-module 10, the short-circuit adjustment lever 854 can be operated. Accordingly, a safety accident due to contact with the sub-module 10 may be prevented.

A first display unit 852 , a second display unit 853 , a short circuit adjusting lever 854 , and a pin member 855 are provided on the upper surface of the indicator housing 851 .

The first display unit 852 and the second display unit 853 display whether the plurality of sub-modules 10 are in a short-circuited state. The user may visually recognize whether a short circuit is present through the first display unit 852 and the second display unit 853 .

The first display unit 852 and the second display unit 853 are disposed to be spaced apart from each other by a predetermined distance. The predetermined distance may be determined according to the rotation radius and rotation angle of the short control lever 854 .

Specifically, the first display portion 852 may be positioned so as to be covered by the short-circuit adjustment lever 854 when the short-circuit adjustment lever 854 is rotated toward the first display portion 852 . In an embodiment, the first indicator 852 may be completely covered by the short-circuit adjustment lever 854 when the short-circuit adjustment lever 854 is rotated to the maximum.

Similarly, the second display portion 853 may be positioned to be obscured by the short-circuit adjustment lever 854 when the short-circuit adjustment lever 854 is rotated toward the second display portion 853 . In an embodiment, the second display portion 853 may be completely covered by the short-circuit adjustment lever 854 when the short-circuit adjustment lever 854 is rotated to the maximum.

The first display unit 852 may be covered when the plurality of sub-modules 10 are in any one of a short-circuited state and a non-shorted state. Also, the second display unit 853 may be covered when the plurality of sub-modules 10 are in the other one of a short-circuited state and a non-shorted state.

The first display unit 852 and the second display unit 853 may display a state different from a state formed by rotating the short-circuit adjustment lever 854 .

That is, when the short circuit adjustment lever 854 is rotated to cover the first display unit 852 , the state displayed on the second display unit 853 may be an energized state formed by the rotation of the short circuit adjustment lever 854 .

Similarly, when the short circuit adjustment lever 854 is rotated to cover the second display portion 853 , the state displayed on the first display portion 852 may be an energized state formed by the rotation of the short circuit adjustment lever 854 .

That is, the first display unit 852 and the second display unit 853 are alternately covered or exposed in each state. Accordingly, the user can determine whether each sub-module 10 is in a short-circuited state using whether the first display unit 852 and the second display unit 853 are exposed.

The short-circuit adjustment lever 854 is operated to short-circuit the plurality of sub-modules 10 at the same time, or to release the short-circuit state. The shorting adjustment lever 854 may be rotated automatically or manually.

The shorting adjustment lever 854 is rotatably coupled to the indicator housing 851 . The coupling is accomplished by a pin member 855 .

The short-circuit adjustment lever 854 is connected to the rotating shaft portion 841 . When the short-circuit adjustment lever 854 is rotated, the rotating shaft portion 841 may also be rotated. As described above, the rotation is transmitted to the moving member 810 through the first and second links 842 and 843 .

The short-circuit adjustment lever 854 is formed to extend to a predetermined length. In an embodiment, the short control lever 854 may extend longer than a distance between the pin member 855 and the first and second display units 852 and 853 .

Accordingly, the short circuit adjusting lever 854 is rotatably coupled to the indicator housing 851 by the pin member 855 to cover either the first display unit 852 or the second display unit 853 . can be rotated.

The pin member 855 rotatably couples the shorting adjustment lever 854 to the indicator housing 851 . The pin member 855 functions as a rotation shaft of the short-circuit adjustment lever 854 .

The pin member 855 may be located at one end of the direction in which the short circuit adjusting lever 854 extends. In an embodiment, the pin member 855 may be located at one end of the short circuit adjusting lever 854 in a direction away from the first and second display units 852 and 853 , that is, in an opposite direction.

Referring to FIG. 21A , a state in which the short circuit adjusting lever 854 is rotated clockwise to cover the first display unit 852 is illustrated. That is, the second display unit 853 is exposed.

Referring to FIG. 21B , a state in which the short circuit adjusting lever 854 is rotated counterclockwise to cover the second display unit 853 is illustrated. That is, the first display unit 852 is exposed.

In the embodiment shown in FIG. 21 , it will be understood that the illustration of the rotating shaft portion 841 is omitted.

As the short-circuit adjustment lever 854 is rotated, the rotating shaft portion 841 is also rotated. The rotation is transmitted to the moving member 810 through the first and second links 842 and 843, so that the moving member 810 slides left or right.

As described above, the variable connector 830 is in conductive contact with any one or more of the shorting blocks 820 adjacent to each other.

When the variable connector 830 is in contact with any one shorting block 820 , each sub-module 10 may be maintained at a different voltage. When the variable connectors 830 are in contact with all of the shorting blocks 820 adjacent to each other, each sub-module 10 may be short-circuited and change to the same voltage.

Movement of the variable connector 830 is achieved by a moving member 810 . The moving member 810 is slidably coupled to the support 23 . The variable connector 830 is coupled to the movable member 810 and slides together with the movable member 810 .

The movement of the moving member 810 is achieved by the rotational operation of the short-circuit adjusting lever 854 and the link member 840 . The rotational motion of the short control lever 854 is converted into a linear motion through the link member 840 to slide the moving member 810 .

The rotation operation of the short-circuit adjustment lever 854 is indicated by the first display portion 852 and the second display portion 853 . When any one of the first display portion 852 and the second display portion 853 is covered by the short-circuit adjustment lever 854 , a state according to the rotation operation of the short-circuit adjustment lever 854 can be displayed.

Accordingly, the plurality of sub-modules 10 can be easily short-circuited, and the user can easily understand the short-circuit state.

10. Description of the cooling passage part 900 according to an embodiment of the present invention

The sub-module 10 according to an embodiment of the present invention includes a cooling passage unit 900 . The cooling passage part 900 communicates with the cooling plate 430 of the explosion-proof frame part 400 . The cooling passage 900 transmits a low-temperature cooling fluid to the cooling plate 430 .

In addition, the cooling flow passage 900 flows inside the cooling plate 430 and receives the cooling fluid heat-exchanged with the IGBT 440 .

The cooling passage 900 is installed in the sub-module 10 and the frame 20 . Accordingly, the cooling passage 900 may be viewed as a configuration included in the frame 20 . In the following description, for convenience of explanation, it is assumed that the cooling passage part 900 is a configuration of the sub-module 10 .

The term “low temperature cooling fluid” used in the following description refers to a cooling fluid that is supplied from the outside and does not exchange heat with the IGBT 440 .

The term “high temperature cooling fluid” used in the following description refers to a cooling fluid that has exchanged heat with the IGBT 440 .

Hereinafter, the cooling passage part 900 according to an embodiment of the present invention will be described in detail with reference to FIGS. 22 to 25 .

Each of the pipes 911 , 912 , 921 , 922 , 931 , 932 , and 950 to be described below may be provided in any shape capable of forming a flow path therein. In an embodiment, the main piping unit 910 may be provided as a pipe member.

In the illustrated embodiment, the cooling passage unit 900 includes a main piping unit 910 , a sub piping unit 920 , a branch piping unit 930 , a piping connection unit 940 , a valve connection piping 950 , and residual water collection. unit 960 .

The main piping unit 910 communicates with an external cooling fluid circulation device (not shown). A low-temperature cooling fluid may flow from the cooling fluid circulation device (not shown) to the main piping unit 910 . In addition, a high-temperature cooling fluid from the main piping unit 910 may flow to the cooling fluid circulation device (not shown).

The main piping unit 910 communicates with the sub piping unit 920 . The low-temperature cooling fluid flowing to the main piping unit 910 may flow to the sub piping unit 920 . The high-temperature cooling fluid flowing to the sub piping unit 920 may flow to the main piping unit 910 .

The main piping unit 910 communicates with the branch piping unit 930 . The branch piping unit 930 communicates with the sub piping unit 920 . Accordingly, the main piping unit 910 and the sub piping unit 920 may communicate.

The main pipe unit 910 is formed to extend in one direction, in the left-right direction in the illustrated embodiment. Each end of the main pipe unit 910 in the extending direction is seated on the horizontal frame 22 .

A single main pipe unit 910 may be provided for each frame 20 . That is, as described above, a plurality of frames 20 may be provided and stacked. In this case, a single number of the main pipe unit 910 may be provided for each stacked frame 20 .

The main pipe unit 910 includes a main inlet pipe 911 , a main outlet pipe 912 , a main pipe fixing member 913 , a fastening member 914 , and a clearance space portion 915 .

A low-temperature cooling fluid flows into the main inlet pipe 911 from a cooling fluid circulation device (not shown). The main inlet pipe 911 communicates with a cooling fluid circulation device (not shown).

The low-temperature cooling fluid flowing into the main inlet pipe 911 flows to the sub inlet pipe 921 through the branch inlet pipe 931 . The main inlet pipe 911 communicates with the branch inlet pipe 931 and the sub inlet pipe 921 .

A main outlet pipe 912 is located adjacent to the main inlet pipe 911 .

A high-temperature cooling fluid flows into the main outlet pipe 912 from the sub outlet pipe 922 and the branch outlet pipe 932 . The main outlet pipe 912 communicates with the branch outlet pipe 932 and the sub outlet pipe 922 .

The high-temperature cooling fluid introduced into the main outlet pipe 912 flows to a cooling fluid circulation device (not shown). The main outlet pipe 912 communicates with a cooling fluid circulation device (not shown).

The main pipe fixing member 913 supports the main inlet pipe 911 and the main outlet pipe 912 to the horizontal frame 22 . The main pipe fixing member 913 is seated on the upper surface of the horizontal frame 22 .

A plurality of main pipe fixing members 913 may be provided. The plurality of main pipe fixing members 913 may be provided in the left horizontal frame 22 and the right horizontal frame 22 , respectively.

The main pipe fixing member 913 is formed to extend in one direction, in the front-rear direction in the illustrated embodiment. In addition, the width direction of the main pipe fixing member 913 , in the illustrated embodiment, the length in the left and right direction may be formed to be less than or equal to the width direction length of the horizontal frame 22 .

A through hole is formed in the main pipe fixing member 913 . One side of the main inlet pipe 911 and the main outlet pipe 912 in the longitudinal direction is through-coupled to the through hole, respectively.

The main pipe fixing member 913 includes a first portion directly coupled to the horizontal frame 22 and a second portion coupled to the first portion and positioned above the first portion. That is, the first portion is positioned between the second portion and the horizontal frame 22 .

The main pipe fixing member 913 includes a fastening through portion 913a. The fastening penetration portion 913a is positioned adjacent to both ends of the first portion and the second portion in the longitudinal direction. The fastening through portion 913a is formed to penetrate in the vertical direction at the above position.

A fastening member (not shown) is fastened to the fastening through portion 913a. Accordingly, the first part and the second part may be coupled.

Specifically, the first part is coupled to the horizontal frame 22 by the fastening member 914 , and the main inlet pipe 911 and the main outlet pipe 912 are through-coupled to the through hole. Next, after the second part is seated on the first part, the main inlet pipe 911 and the main outlet pipe 912 , a fastening member (not shown) may be fastened to the fastening through part 913a.

It will be understood that a portion of the through hole is formed in the first portion, and the other portion of the through hole is formed in the second portion.

The fastening member 914 fixes the main pipe fixing member 913 to the horizontal frame 22 . Specifically, the fastening member 914 is through-coupled to a fastening hole (not shown) formed through the first portion of the main pipe fixing member 913 .

A plurality of fastening members 914 may be provided. In the illustrated embodiment, two fastening members 914 are respectively formed on the front side and rear side of the main pipe fixing member 913, and a total of four are provided.

The clearance space part 915 is a space formed between the first part and the second part of the main pipe fixing member 913 . The clearance space part 915 is formed so that the surfaces of the first part and the second part facing each other are spaced apart by a predetermined distance. In a state in which the clearance space portion 915 is formed, a fastening member (not shown) is through-coupled to the fastening through-portion 913a.

The clearance space part 915 may compensate for an increase in volume that may be generated as the cooling fluid flows through the main inlet pipe 911 or the main outlet pipe 912 . In addition, the clearance space part 915 can prevent the main inlet pipe 911 or the main outlet pipe 912 from being damaged by the vibration by buffering vibrations generated when the sub-module 10 is operated. .

The sub piping unit 920 communicates with the main piping unit 910 and the piping connection unit 940 . The low-temperature cooling fluid introduced into the main piping unit 910 may flow through the sub piping unit 920 to the piping connection unit 940 . In addition, the high-temperature cooling fluid transferred from the pipe connection unit 940 may pass through the sub pipe unit 920 and flow to the main pipe unit 910 .

The sub piping unit 920 communicates with the main piping unit 910 . The communication is achieved by the branch piping unit 930 communicating with the main piping unit 910 and the sub piping unit 920, respectively. In addition, the sub pipe unit 920 communicates with the pipe connection unit 940 .

The sub-pipe unit 920 is formed to extend in one direction, in the front-rear direction in the illustrated embodiment. One side of the sub piping unit 920, the rear end in the illustrated embodiment is connected to the end of the branch piping unit (930). The other side of the sub-pipe unit 920 , in the illustrated embodiment, the front end is connected to the pipe connection unit 940 .

A plurality of sub piping units 920 may be provided. A plurality of sub-pipe units 920 may be provided for each sub-module 10 .

The sub pipe unit 920 includes a sub inlet pipe 921 and a sub outlet pipe 922 .

The sub inlet pipe 921 is a passage through which the low-temperature cooling fluid introduced from the main inlet pipe 911 passes. The low-temperature cooling fluid may flow through the sub-inlet pipe 921 to the pipe connection unit 940 .

The sub outlet pipe 922 is a passage through which the high-temperature cooling fluid introduced from the pipe connection unit 940 passes. The high-temperature cooling fluid may flow through the sub outlet pipe 922 to the main outlet pipe 912 .

A branch piping unit 930 is provided at a portion where the sub piping unit 920 and the main piping unit 910 communicate.

The branch piping unit 930 communicates with the main piping unit 910 and the sub piping unit 920 . The branch piping unit 930 communicates with the main piping unit 910 and the sub piping unit 920 , respectively.

The branch piping unit 930 may be formed in a joint structure. That is, the angle between the one end at which the branch pipe unit 930 is connected to the main pipe unit 910 and the other end at which the branch pipe unit 930 is connected to the sub pipe unit 920 may be changed.

In one embodiment, the angle between the one end and the other end of the branch pipe unit 930 may be a right angle.

Accordingly, the main piping unit 910 and the sub piping unit 920 may communicate with each other without deforming their respective shapes.

A plurality of branch pipe units 930 may be provided. A plurality of branch pipe units 930 may be provided for each sub-module 10 .

The branch pipe unit 930 includes a branch inlet pipe 931 and a branch outlet pipe 932 .

The branch inlet pipe 931 is a passage through which the low-temperature cooling fluid introduced into the main inlet pipe 911 flows to the sub inlet pipe 921 . The branch inlet pipe 931 communicates with the main inlet pipe 911 and the sub inlet pipe 921 , respectively.

The branch outlet pipe 932 is a passage through which the high-temperature cooling fluid introduced into the sub outlet pipe 922 flows to the main outlet pipe 912 . The branch outlet pipe 932 communicates with the main outlet pipe 912 and the sub outlet pipe 922 , respectively.

The pipe connection unit 940 communicates with the sub piping unit 920 and the valve connection pipe 950 . The pipe connection unit 940 communicates with the sub piping unit 920 and the valve connection pipe 950 , respectively.

In addition, the pipe connection unit 940 supports the sub pipe unit 920 and the valve connection pipe 950 . Accordingly, the coupling state between the sub-pipe unit 920 and the valve connection pipe 950 may be stably maintained.

A plurality of pipe connection units 940 may be provided. A plurality of pipe connection units 940 may be provided for each sub-module 10 .

The pipe connecting unit 940 includes an end connecting member 941 , a pipe supporting member 942 , and a pipe fixing member 943 .

The end connection member 941 couples the sub piping unit 920 and the valve connection piping 950 to each other so that the respective ends of the sub piping unit 920 and the valve connection piping 950 are in communication with each other. The end connection member 941 is positioned between the sub piping unit 920 and the valve connection pipe 950 .

The end connection member 941 communicates with the sub piping unit 920 and the valve connection pipe 950 , respectively. The cooling fluid may flow from the sub piping unit 920 toward the valve connection piping 950 through the end connection member 941 , or vice versa.

The end connecting member 941 includes a first end connecting member 941a and a second end connecting member 941b.

The first end connection member 941a is connected to an end of the sub piping unit 920 . The first end connection member 941a communicates with the sub piping unit 920 .

25 , a plurality of first end connection members 941a may be provided. The plurality of first end connection members 941a are respectively coupled to respective ends of the sub inlet pipe 921 and the sub outlet pipe 922 facing the valve connecting pipe 950 .

The second end connecting member 941b is connected to an end of the valve connecting pipe 950 . The second end connecting member 941b communicates with the valve connecting pipe 950 .

25 , a plurality of second end connection members 941b may be provided. The plurality of second end connection members 941b are respectively coupled to respective ends of the valve inlet pipe 951 and the valve outlet pipe 952 facing the sub pipe unit 920 .

Ends of the first end connecting member 941a and the second end connecting member 941b facing each other may be coupled to each other. The first end connecting member 941a and the second end connecting member 941b communicate with each other.

The pipe support member 942 is configured to support the sub pipe unit 920 and the valve connection pipe 950 . The pipe support member 942 is coupled to the sub pipe unit 920 and the valve connection pipe 950 , respectively.

As will be described later, the sub pipe unit 920 may be fixed by a pipe fixing member 943 coupled to the fixing frame 25 . The pipe support member 942 simultaneously supports the stably fixed sub pipe unit 920 and the valve connection pipe 950 .

Accordingly, the valve connecting pipe 950 is also stably supported, and the connection state between the sub pipe unit 920 and the valve connecting pipe 950 may be stably maintained.

In the illustrated embodiment, the pipe support member 942 is located below the sub pipe unit 920 and the valve connection pipe 950 . The position of the pipe support member 942 may be changed.

The pipe support member 942 is formed to extend in the direction in which the sub-pipe unit 920 is formed, in the illustrated embodiment, in the front-rear direction.

The pipe support member 942 may be formed of a material capable of a predetermined shape deformation. In one embodiment, the pipe support member 942 may be formed of a synthetic resin material. Accordingly, even if vibration is generated as the sub-module 10 is operated, the shape of the pipe support member 942 is deformed and the vibration may be buffered.

One side of the direction in which the pipe support member 942 is extended, in the illustrated embodiment, the front side extends to the sub pipe unit 920 . The front end of the pipe support member 942 is bent toward the sub pipe unit 920 .

A first clip portion 942a is provided at the bent portion. The first clip portion 942a includes a pair of curved surfaces facing each other. A predetermined space is formed between the curved surfaces. One side of the sub piping unit 920 facing the end connection member 941 is detachably inserted and coupled to the predetermined space.

The other side in the direction in which the pipe support member 942 extends, in the illustrated embodiment, the rear side extends to the valve connection pipe 950 . The rear end of the pipe support member 942 is bent toward the valve connecting pipe 950 .

A second clip portion 942b is provided at the bent portion. The second clip portion 942b includes a pair of curved surfaces facing each other. A predetermined space is formed between the curved surfaces. One side of the valve connection pipe 950 facing the end connection member 941 is detachably inserted and coupled to the predetermined space.

The pipe fixing member 943 fixes the sub pipe unit 920 . The pipe fixing member 943 is coupled to the sub pipe unit 920 .

The pipe fixing member 943 may be formed of a material capable of a predetermined shape deformation. In one embodiment, the pipe fixing member 943 may be formed of a synthetic resin material. Accordingly, even if vibration is generated as the sub-module 10 is operated, the shape of the pipe fixing member 943 is deformed and the vibration may be buffered.

The pipe fixing member 943 is coupled to the fixing frame 25 . Specifically, one side of the pipe fixing member 943 facing the capacitor assembly 100 is fastened to the fixing frame 25 .

The pipe fixing member 943 is formed to extend toward the sub pipe unit 920 from the one side. The pipe fixing member 943 may include a vertical portion and an inclined portion.

The vertical portion is a portion in which the pipe fixing member 943 is in contact with and coupled to the fixing frame 25 . The vertical portion may be formed to extend along one side of the fixing frame 25, the rear side in the illustrated embodiment.

The inclined portion is formed to extend toward the sub piping unit 920 from the upper end of the vertical portion. The inclined portion is formed to extend at a predetermined angle to the vertical portion. In an embodiment, the predetermined angle may be an obtuse angle.

A first fixing part 943a is formed on one side of the upper end of the inclined part. The first fixing part 943a includes a pair of curved surfaces facing each other. A predetermined space is formed between the curved surfaces. One side of the sub inlet pipe 921 facing the end connection member 941 is detachably inserted and coupled to the predetermined space.

A second fixing part 943b is formed on the other side of the upper end of the inclined part. The second fixing part 943b includes a pair of curved surfaces facing each other. A predetermined space is formed between the curved surfaces. One side of the sub outlet pipe 922 facing the end connection member 941 is detachably coupled to the predetermined space.

In summary, the sub pipe unit 920 and the valve connection pipe 950 are fixed and supported by the pipe connection unit 940 . Accordingly, the coupling state between the sub-pipe unit 920 and the valve connection pipe 950 may be stably maintained.

The valve connection pipe 950 communicates with the pipe connection unit 940 and the cooling plate 430 . The valve connection pipe 950 communicates with the pipe connection unit 940 and the cooling plate 430 , respectively.

A plurality of valve connection pipes 950 may be provided. The plurality of valve connecting pipes 950 communicate with the inlet 431 and the pipe connecting unit 940 , and the outlet 432 and the pipe connecting unit 940 , respectively.

The valve connecting pipe 950 extends between the cooling plates 430 in the pipe connecting unit 940 . A plurality of valve connection pipes 950 may be provided. A plurality of valve connection pipes 950 may be provided for each sub-module 10 .

The valve connection pipe 950 includes a valve inlet pipe 951 and a valve outlet pipe 952 .

The low-temperature refrigerant fluid introduced through the sub-inlet pipe 921 flows into the valve inlet pipe 951 . The valve inlet pipe 951 communicates with the inner space of the cooling plate 430 through the inlet 431 .

The introduced low-temperature cooling fluid flows into the inner space of the cooling plate 430 through the inlet 431 .

A valve outlet pipe 952 is located adjacent to the valve inlet pipe 951 .

A high-temperature cooling fluid that flows through the cooling plate 430 and heat-exchanged with the IGBT 440 is introduced into the valve outlet pipe 952 . The valve outlet pipe 952 communicates with the inner space of the cooling plate 430 through the outlet 432 .

The introduced high-temperature cooling fluid flows to the main outlet pipe 912 through the valve outlet pipe 952 .

The residual water collection unit 960 collects the residual water discharged from the pipe connection unit 940 . The residual water collection unit 960 may be located below a point where the first end connecting member 941a and the second end connecting member 941b are coupled.

The residual water collection unit 960 is coupled to the capacitor assembly 100 . Specifically, the residual water collection unit 960 is coupled to a bracket member provided on the upper surface of the capacitor assembly 100 .

The residual water collection unit 960 may be detachably coupled to the capacitor assembly 100 . When the residual water exceeding a predetermined capacity is collected by the residual water collecting unit 960 , the user may remove the residual water collecting unit 960 to discharge the collected residual water.

A plurality of residual water collecting units 960 may be provided. A plurality of residual water collecting units 960 may be provided for each sub-module 10 .

The residual water collecting unit 960 is formed to extend upwardly from the capacitor assembly 100 . Specifically, the residual water collection unit 960 includes a first portion extending parallel to the upper surface of the capacitor assembly 100 , a second portion extending upwardly at a predetermined angle from the first portion to the first portion, and a second portion extending upward from the first portion. and a third portion extending horizontally from the second portion.

The residual water collecting unit 960 includes a residual water collecting space 961 . The residual water collection space 961 is a space in which the residual water dropped from the pipe connection unit 940 is collected. The residual water collecting space 961 is recessed by a predetermined distance from the third part.

As described above, the cooling passage 900 circulates a cooling fluid for cooling the IGBT 440 . The low-temperature cooling fluid passes through the main inlet pipe 911, the branch inlet pipe 931, the sub inlet pipe 921, the pipe connection unit 940, and the valve inlet pipe 951 in the cooling fluid circulation device (not shown). to flow into the cooling plate 430 .

The low-temperature cooling fluid introduced into the cooling plate 430 flows through the inner space of the cooling plate 430 and exchanges heat with the IGBT 440 . The heat generated in the IGBT 440 is transferred to a low-temperature cooling fluid. Accordingly, the low-temperature cooling fluid is changed into a high-temperature cooling fluid.

The hot cooling fluid is discharged from the cooling plate 430 . The discharged high-temperature cooling fluid passes through the valve outlet pipe 952 , the pipe connection unit 940 , the sub outlet pipe 922 , the branch outlet pipe 932 , and the main outlet pipe 912 to a cooling fluid circulation device (not shown). ) to flow.

Accordingly, the heat generated in the IGBT 440 may be discharged by the cooling fluid. Accordingly, the IGBT 440 is maintained at an appropriate temperature, so that the operation reliability of the sub-module 10 may be improved.

In addition, the sub pipe unit 920 and the valve connection pipe 950 are supported by the pipe support member 942 . Furthermore, the sub pipe unit 920 is fixed by the pipe fixing member 943 .

Accordingly, the coupling of each component of the cooling passage part 900 is not released by vibration generated as the sub-module 10 is operated.

A residual water collection unit 960 is provided below the pipe connection unit 940 . The residual water collection unit 960 collects the residual water dropped from the pipe connection unit 940 . Accordingly, the dropped residual water does not flow into the capacitor assembly 100 or the valve assembly 200 .

Accordingly, the cooling fluid is not freely leaked and the components of the sub-module 10 are not damaged.

Although the above has been described with reference to the preferred embodiment of the present invention, those of ordinary skill in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that you can.

1: Modular Multilevel Converter
10: Sub Module
20: frame
21: vertical frame
22: horizontal frame
23: support
24: insulation member
25: fixed frame
100: capacitor assembly
110: capacitor housing
120: capacitor connector
121: first capacitor connector
122: second capacitor connector
200: valve assembly
210: valve cover part
220: valve connector
230: input busbar
231: first input busbar
232: second input bus bar
240: bypass switch
250: output busbar
260: insulated housing
261: first wall
262: second wall
263: third wall
264: fourth wall
270: insulating layer
280: printed circuit board
300: ground
310: ground rod unit
310a: first ground rod unit
310b: second ground rod unit
311: body part
312: coupling part
313: ground conductor part
314: ground conductor
315: sealing (sealing) part
316: resistance unit
320: ground connector
321: first ground connector
322: second ground connector
330: ground protrusion
331: first ground protrusion
332: second ground protrusion
340: ground conductor
341: PCB ground lead
342: housing ground lead
343: busbar grounding conductor
400: explosion-proof frame part
410: case unit
411: protrusion
412: ground rod through hole
413: IGBT receptacle
413a: first IGBT receiving unit
413b: second IGBT receiving unit
413c: bulkhead part
414: inner wall portion
414a: first inner wall portion
414b: second inner wall portion
415: outer wall portion
415a: first outer wall portion
415b: second outer wall portion
416: internal communication groove
416a: first internal communication groove
416b: second internal communication groove
417: external communication groove
417a: first external communication groove
417b: second external communication groove
418: buffer space portion
418a: first buffer space portion
418b: second buffer space portion
419: corner
420: energized bus bar
421: first energized bus bar
422: second energized bus bar
430: cooling plate
431: inlet
432: outlet
440: IGBT
441: first IGBT
442: second IGBT
500: rail assembly
510: cart unit
510a: capacitor cart unit
510b: valve cart unit
511: cart body
511a: elastic member coupling portion
512: extension
513: round part
513a: cart hollow part
514: wheel (wheel) part
514a: wheel body
514b: disk unit
514c: cart coupling part
520: bracket unit
521: horizontal part
522: vertical part
530: fastening unit
531: lever fastening member
532: wheel fastening member
540: rail (rail) unit
541: rail body portion
542: rail bend
542a: first rail bend
542b: second rail bend
542c: third rail bend
542d: side limits
542e: upper surface limiting part
543: rail extension
543a: fastener
544: step part
544a: guide space part
545: support
600: escape prevention unit
610: stopper member
611: stopper body portion
612: locking plate
613: wheel coupling part
614: elastic member coupling hole
620: rotating bearing member
630: elastic member
631: cart connection
632: stopper connection
640: blocking plate
641: blocking fastening member
650: stop groove
651: first side
652: second side
700: installation separation
710: lever member
711: extension
711a: first extension
711b: second extension
712: handle part
720: lever coupling member
721: lever insertion hole
730: lever insertion groove
731: first lever insertion groove
732: second lever insertion groove
800: short circuit adjustment unit
810: moving member
811: extended body portion
812: end insertion groove
820: paragraph block
821: short circuit conductor
822: moving member support
822a: first part
822b: second part
823: contact
830: variable connector
831: first connector end
832: second connector end
840: link missing
841: rotation shaft part
842: first link
843: second link
850: no indicator
851: indicator housing
852: first display unit
853: second display unit
854: short-circuit adjustment lever
855: no pin
900: cooling passage part
910: main piping unit
911: main inlet pipe
912: main outlet piping
913: main pipe fixing member
913a: fastening penetration
914: fastening member
915: space for clearance
920: sub piping unit
921: sub inlet pipe
922: sub outlet piping
930: branch piping unit
931: branch inlet piping
932: Branch Outflow Piping
940: pipe connection unit
941: end connecting member
941a: first end connecting member
941b: second end connecting member
942: pipe support member
942a: first clip part
942b: second clip part
943: pipe fixing member
943a: first fixing part
943b: second fixing part
950: valve connecting pipe
951: valve inlet piping
952: valve outlet piping
960: residual water collection unit
961: residual water collection space unit

Claims (12)

a capacitor assembly accommodating the capacitor element therein;
a case unit accommodating an IGBT electrically connected to the capacitor assembly; and
and a ground rod unit configured to be electrically connected to the capacitor element and the resistor unit to ground the capacitor element,
The capacitor assembly comprises:
and a capacitor connector energably connected to the capacitor element and protruding toward the case unit;
On the upper side of the capacitor connector,
a ground connector energably connected to the capacitor connector; and
A ground protrusion formed to protrude from the ground connector toward the case unit, and a ground protrusion connected to the ground connector to be energized,
The ground rod unit is detachably inserted and coupled to the ground protrusion,
sub module. According to claim 1,
The ground rod unit,
a body portion extending in one direction and having a predetermined space therein extending in the one direction;
a grounding conductor in the inner space of the body, located on one side facing the grounding protrusion, and in contact with the grounding protrusion so as to be energized; and
In the inner space of the body portion, extending from the grounding conductor portion toward the other side opposite to the one side, including a grounding conductor portion connected to the grounding conductor portion to be energized,
sub module. 3. The method of claim 2,
One side of the grounding conductor opposite to the grounding conductor is connected to the resistor so as to be energized,
sub module. According to claim 1,
The capacitor connector is electrically connected to the ground protrusion,
sub module. delete According to claim 1,
a valve assembly positioned at one side of the capacitor assembly and energably connected to the capacitor assembly;
the ground protrusion extends towards the valve assembly;
sub module. 7. The method of claim 6,
The case unit is
coupled to the valve assembly;
On one side of the case unit,
A ground rod through hole formed through in a direction toward the capacitor assembly and through which the ground rod unit is detachably coupled is positioned;
sub module. 8. The method of claim 7,
The ground rod through hole is disposed such that a central axis thereof is the same as a central axis of the ground protrusion,
sub module. According to claim 1,
A plurality of ground protrusions are provided, and the plurality of ground protrusions are disposed to be spaced apart from each other,
A plurality of ground rod units are provided, and the plurality of ground rod units are detachably inserted and coupled to the plurality of ground protrusions, respectively.
sub module. delete According to claim 1,
On the upper side of the case unit,
Protrusions positioned on one side facing the capacitor assembly and the other side opposite to the one side, respectively, are provided with protrusions protruding from an upper side of the case unit by a predetermined distance;
Inside each of the protrusions,
a ground rod through hole formed through the capacitor assembly in a direction toward the capacitor assembly;
sub module. 12. The method of claim 11,
Each of the ground rod through-holes is disposed such that a central axis thereof is the same as a central axis of the ground protrusion,
The ground rod unit,
At one side of the ground rod through hole opposite to the ground protrusion, it is through-coupled to each of the ground rod through holes,
sub module.

Images