CN110944499A

CN110944499A - Converter heat abstractor

Info

Publication number: CN110944499A
Application number: CN201911337366.7A
Authority: CN
Inventors: 刘钰; 蒋世用; 姜颖异
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-03-31

Abstract

The invention provides a converter heat dissipation device, relates to the technical field of converters, and solves the technical problems that at least two converter heat dissipation devices in the prior art are required to meet the heat dissipation requirement, and the heat dissipation effect of the heat dissipation device on a capacitor side is poor. The converter heat dissipation device comprises a rear back plate, a guide rail and a heat dissipation backpack; the rear back plate is positioned at the rear part of the electronic component of the converter, and the guide rail is arranged on the rear back plate; the number of the heat dissipation backpack is one, and the heat dissipation backpack can circularly dissipate heat of the electronic component along the guide rail in a reciprocating motion mode. According to the invention, when one heat dissipation backpack reciprocates along the guide rail, the converter is circularly dissipated, so that the cost is reduced; meanwhile, the cold source coverage of all capacitors can be realized by bending the capacitor side guide rail of the electronic component for multiple times, so that the heat dissipation effect of the heat dissipation backpack on the capacitor side is improved, and the heat dissipation effect on the converter is improved.

Description

Converter heat abstractor

Technical Field

The invention relates to the technical field of converters, in particular to a converter heat dissipation device.

Background

The high-power converter comprises electric elements such as a reactor, a circuit breaker, an IGBT module and a capacitor. In the operation process, each electric component can emit a large amount of heat, so that a heat radiation fan needs to be added behind the converter for heat radiation, and the heat radiation effect of the heat radiation fan is limited, so that the heat radiation fan and an evaporator need to be matched together to form a heat radiation device, and the temperature of the system can be reduced to an ideal effect.

The heat sink is usually fixed, which creates two problems: firstly, heat dissipation devices need to be added on the side of the reactor and the side of the capacitor, so that the cost is high; secondly, when the heat dissipation device is fixed, the coverage area of cold air blown out by the heat dissipation fan is very small, and only circulation heat dissipation can be performed on individual capacitors by using a fluid principle, so that the temperature of part of capacitors is proper, but the temperature of the capacitors at the places where the cold air cannot reach is still very high, and a good heat dissipation effect cannot be achieved.

The applicant has found that the prior art has at least the following technical problems:

the existing converter heat dissipation devices can meet the heat dissipation requirement only by at least two heat dissipation devices, and meanwhile, the heat dissipation effect of the heat dissipation device on the capacitor side is poor.

Disclosure of Invention

The invention aims to provide a converter heat dissipation device, which aims to solve the technical problems that at least two converter heat dissipation devices in the prior art are required to meet the heat dissipation requirement, and the heat dissipation effect of the heat dissipation device on the capacitor side is poor. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a converter heat dissipation device, which comprises a rear back plate, a guide rail and a heat dissipation backpack, wherein the rear back plate is provided with a plurality of guide rails; the rear back plate is positioned at the rear part of the electronic component of the converter, and the guide rail is arranged on the rear back plate; the number of the heat dissipation backpack is one, and the heat dissipation backpack can circularly dissipate heat of the electronic component along the guide rail in a reciprocating motion mode.

Optionally, the heat dissipation backpack includes a housing, a fixing frame, and rollers; the fixed frame and the roller are fixed on the shell.

Optionally, the fixing frame can fix the heat dissipation backpack and the back plate; the roller is capable of moving along the guide rail.

Optionally, the heat dissipation backpack further includes a fan and an evaporator, and the fan and the evaporator are respectively disposed at two ends inside the housing.

Optionally, a controller is arranged on the fixing frame, and the controller can control the position and the speed of the movement of the roller.

Optionally, the shape of the guide rail is curved.

Optionally, the converter heat dissipation device further comprises a box body, and the electronic component and the back plate are both arranged in the box body.

Optionally, the inside of the box body comprises a first accommodating cavity and a second accommodating cavity; the electronic component arranged in the first accommodating cavity comprises a capacitor, and the electronic component arranged in the second accommodating cavity comprises a reactor.

Optionally, one or more temperature sensors are disposed in each of the first accommodating cavity and the second accommodating cavity.

Optionally, the temperature sensor is disposed at the top of the first accommodating cavity and/or the second accommodating cavity or near the electronic component.

Optionally, the guide rail passes through the first accommodating cavity and the second accommodating cavity at corresponding positions of the backboard.

Optionally, the guide rail passes through the first accommodating cavity at least once at a corresponding position of the backboard.

Any technical scheme can at least produce the following technical effects:

the number of the radiating backpacks is changed from two or more to one, and when one radiating backpack reciprocates along the guide rail, the circulating radiation of the converter is realized, so that the same or similar radiating effect of a plurality of radiating backpacks which are fixedly arranged originally is achieved, and the cost is reduced; meanwhile, the shape of the guide rail can be set as required, particularly, the guide rail at the side of the capacitor of the electronic component can be covered with cold sources of all capacitors in a multi-bending mode and the like, so that the heat dissipation effect of the heat dissipation backpack at the side of the capacitor is improved, the temperature of each capacitor is balanced, and the heat dissipation effect of the converter is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a heat sink for a current transformer;

FIG. 2 is a front view of a heat dissipating backpack;

fig. 3 is a side view of a heat dissipating backpack.

In figure 1, a backplate; 2. a guide rail; 3. a heat dissipation backpack; 31. a housing; 32. a fixed mount; 33. a roller; 34. a fan; 35. an evaporator; 4. a box body; 41. a first accommodating cavity; 42. a second receiving cavity; 5. an electronic component; 51. a capacitor; 52. a reactor; 6. a temperature sensor; 7. a circuit breaker.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention provides a converter heat dissipation device, which comprises a backboard 1, a guide rail 2 and a heat dissipation backpack 3, as shown in figure 1. The backboard 1 is located at the rear part of the electronic component 5 of the converter, the backboard 1 is fixed with the circuit board of the electronic component 5, the fixing mode of the backboard 1 in the converter is the same as that in the prior art, namely, a plurality of column sleeves are arranged on the backboard 1, each column sleeve is provided with a threaded hole, a plurality of screws penetrate through the circuit board of the electronic component 5 and are locked into the threaded holes of the column sleeves, and therefore the backboard 1 is fixed at the other side of the circuit board for fixing the electronic component 5. Guide rail 2 sets up on backplate 1, and guide rail 2 accessible cementing, mode such as welding are fixed on backplate 1, and guide rail 2's shape can be selected as required to the cold source that realizes that heat dissipation knapsack 3 produces is suitable to electronic components 5's even cover. The quantity of heat dissipation knapsack 3 is one, can follow 2 reciprocating motion of guide rail to 5 circulation heat dissipations of electronic components, and heat dissipation knapsack 3 dispels the heat in the in-process of motion to the region that closes on in step, and the radiating mode can be for water-cooling or forced air cooling, and guide rail 2 has played the guide effect to heat dissipation knapsack 3's motion, and the position change through guide rail 2 has just realized heat dissipation knapsack 3's position change, has also realized the change in heat dissipation region. The number of the radiating backpacks 3 is changed from two or more to one, when one radiating backpack 3 reciprocates along the guide rail 2, the circulating radiation of the converter is realized, the same or similar radiating effect of a plurality of radiating backpacks 3 which are fixedly arranged originally is achieved, and the cost is reduced; meanwhile, the shape of the guide rail 2 can be set as required, and particularly, the guide rail 2 on the side of the capacitor of the electronic component 5 can be covered with cold sources of all capacitors in a multi-bending mode and the like, so that the heat dissipation effect of the heat dissipation backpack on the side of the capacitor is improved, the temperature of each capacitor is balanced, and the heat dissipation effect of the converter is improved.

As an alternative embodiment, as shown in fig. 2-3, the heat dissipating backpack 3 includes a housing 31, a fixing frame 32, and rollers 33. The fixing frame 32 and the roller 33 are both fixed on the shell 31, the fixing frame 32 is located above the roller 33 and connected with the shell 31 through screws, and the fixing frame 32 can be a roller fixing frame in the prior art, so that the roller 33 can be fixed and limited, and the roller 33 and the shell 31 are connected. The fixing bracket 32 can mount the heat dissipation backpack 3 to the backboard 1. The roller 33 can move along the guide rail 2, and can adopt the common modes such as groove or ridge cooperation between the roller 33 and the guide rail 2 in the prior art, namely the guide rail 2 is provided with a groove, and the roller 33 is provided with a ridge matched with the groove, so that the movement of the roller on the guide rail 2 is realized, and the roller 33 can be prevented from sliding out of the track by the matching mode. The heat dissipation backpack 3 further includes a fan 34 and an evaporator 35, the fan 34 and the evaporator 35 are respectively disposed at two ends of the interior of the housing 31, and the evaporator 35 and the fan 34 can be fixed to the housing 31 by bolts. The evaporator 35 is connected with the cooling medium through an external hose, and the hose can be bent and moved freely along with the heat dissipation backpack 3. The evaporator 35 absorbs heat emitted by the electronic component 5 and converts the heat into cold air, the fan 34 blows out the cold air, and the cold air blown out by the fan 34 can reach any position inside the converter when moving along with the guide rail 2, and all positions can blow the cold air, so that the inside of the converter can reach the temperature equalization and achieve the good heat dissipation effect. The fixed frame 32 is provided with a controller (not shown) which can control the position and speed of the movement of the roller 33. The heat dissipation backpack 3 further includes a motor (not shown in the figures), the motor can be connected to the housing 31 through screws and located on two sides of the roller 33, the motor is in transmission connection with the roller 33, the motor is preferably a miniature speed reduction motor, and the motor drives the roller 33 to rotate to realize the movement of the whole heat dissipation backpack 3 on the guide rail 2. The motor is connected with the controller electricity, and the controller can send control signal to the motor to the slew velocity of control motor realizes the fast and slow switching of heat dissipation knapsack 3 motion, and the controller also can control the shut down motor, will dispel the heat knapsack 3 and stop in a certain position, and the switching of motor rotation direction can also be realized to the controller, realizes gyro wheel 33 reciprocating motion. The control of the motor by the controller belongs to the mature technology in the prior art, and the prior art is directly adopted here, and the detailed description is omitted here.

As an alternative embodiment, as shown in fig. 1, the shape of the guide rail 2 is a curve, and the curve of the guide rail 2 can facilitate uniform coverage of the electronic component 5, and at the same time, the curve shape can also facilitate steering of the guide rail 2, so as to achieve steering of the heat dissipation backpack 3. The shape of preferred guide rail 2 is "S type" curve to set up less camber in turning to the position, realize the steady of heat dissipation knapsack 3 motion and turn to, gyro wheel 33 carries out smooth motion, ensures that heat dissipation knapsack 3 can carry out continuous motion, and heat dissipation knapsack 3 can all stop twice in a motion cycle in electric capacity side and reactor side simultaneously.

As an optional implementation manner, as shown in fig. 1, the converter heat dissipation device further includes a box 4, the electronic component 5 and the back plate 1 are both disposed in the box 4, and the box 4 is used for accommodating the electronic component 5 and the corresponding circuit board of the converter, the back plate 1, the guide rail 2 connected to the back plate 1, the heat dissipation backpack 3, and the like. The interior of the box 4 includes a first accommodating cavity 41 and a second accommodating cavity 42, and the electronic components 5 include a capacitor 51 and a reactor 52, and other types of electronic components in the converter, such as an IGBT device (not shown), a circuit breaker 7, and the like. The electronic component arranged in the first accommodation cavity 41 includes a capacitor 51, and the capacitor 51 is arranged in two divisions in the vertical direction. The electronic components arranged in the second accommodating cavity comprise a reactor 52, and a circuit breaker 7 is further arranged above the reactor 52 and used for controlling the current on-off of the converter.

As an optional implementation manner, as shown in fig. 1, one or more temperature sensors 6 are disposed in the first accommodating cavity 41 and the second accommodating cavity 42, the temperature sensors 6 may be fixed to the inner side of the box 4, and collect and convert temperature signals in the first accommodating cavity 41 and the second accommodating cavity 42 into electrical signals, the temperature sensors 6 are electrically connected to the controller, and after the temperature electrical signals of the temperature sensors 6 are transmitted to the controller, the controller can control the rotation of the motor to drive the roller 33 to move according to the corresponding temperature. When the working temperature of the capacitor 51 is relatively high, and the temperature signal acquired by the temperature sensor 6 in the first accommodating cavity 41 exceeds a set value (a specific value is set as required), the controller controls the roller 33 to move the heat dissipation backpack 3 to the position of the back plate 1 corresponding to the first accommodating cavity 41 (i.e., the position of the back plate 1 corresponding to the capacitor 51 right behind the circuit board position), so as to realize continuous heat dissipation of the capacitor 51. Similarly, when the operating temperature of the reactor 52 is higher, the controller controls the roller 33 to move the heat dissipation backpack 3 to the position of the back plate 1 corresponding to the second accommodating cavity 42 (i.e. the position of the back plate 1 corresponding to the reactor 52 right behind the circuit board position), so as to realize continuous heat dissipation of the reactor 52. The number of the temperature sensors 6 can be set to be one or more according to needs, corresponding temperature information can be collected more accurately when the temperature sensors are set to be multiple, the temperature information at multiple positions can be collected conveniently, and partial temperature information can be collected when one of the temperature sensors 6 is damaged. Temperature sensor 6 sets up at the first top that holds cavity 41 and/or second and hold cavity 42, because the density of hot-air is less, can hold cavity 41, the inside that cavity 42 was held to the second in the first portion of holding continuously rises, temperature sensor 6 sets up and is convenient for gather first temperature information that holds cavity 41, the second holds cavity 42 more accurate at the top, is favorable to the controller to send more accurate control operation, realizes the better heat dissipation to the converter. The temperature sensor 6 can also be arranged close to the electronic component 5, the electronic component 5 is a heating source of the converter heat dissipation device, and the temperature sensor 6 is arranged near the capacitor 51 and/or the reactor 52 and the like to acquire corresponding temperature information, so that the control operation of a subsequent controller is facilitated. The specific position of temperature sensor 6 can be selected according to the space conditions in first accommodation cavity 41 and second accommodation cavity 42 at this moment, and temperature sensor 6 can be fixed on the circuit board by gluing, clamping and the like.

As an alternative embodiment, as shown in fig. 1, the guide rail 2 passes through the corresponding positions of the first and second receiving

cavities

41 and 42 on the back panel 1 (i.e. the positions of the back panel 1 opposite to the positions of the circuit boards of the first and second receiving cavities 41 and 42). One end of the guide rail 2 is located on the capacitor side corresponding to the first housing chamber 41, and the other end is located on the reactor 52 side corresponding to the second housing chamber 42. The initial position of the heat dissipation backpack 3 is the heat dissipation backpack 3 marked by the solid line in the figure, the terminal position is the heat dissipation backpack 3 marked by the dotted line in the figure, the heat dissipation backpack 3 moves on the guide rail 2 from the initial position to the terminal position, and then returns to the initial position from the terminal position, and the process is repeated. Guide rail 2 passes the first corresponding position that holds cavity 41 at the backplate 1 at least once, the electric capacity side volume that general first holding cavity 41 corresponds is bigger, therefore, if guide rail 2 only once passes the first corresponding position that holds cavity 41 at backplate 1, can not realize the good heat dissipation to electric capacity 51, guide rail 2 passes electric capacity 51 side back at least twice, heat dissipation knapsack 3 moves along guide rail 2 and just can realize better heat dissipation to electric capacity, the number of times that specifically passes can be set up according to the relative volume size of heat dissipation knapsack 3 and first holding cavity 41 especially the height that first holds cavity 41.

The working process of the invention is as follows: when the converter operates, the fan 34 of the heat dissipation backpack 3 is started, and the controller installed on the heat dissipation backpack 3 controls the roller to rotate by controlling the motor to rotate, so that the heat dissipation backpack 3 reciprocates along the track of the guide rail 2, and the electronic components 5 are uniformly cooled in the converter. When the temperature of the capacitor 51 side corresponding to the first accommodating cavity 41 is higher, the temperature sensor 6 installed on the capacitor 51 side transmits a temperature signal to the controller on the heat dissipation backpack 3, and controls the heat dissipation backpack to move to the capacitor 51 side for heat dissipation. Similarly, when the temperature of the reactor 52 side corresponding to the second accommodating cavity 42 is high, the temperature sensor 6 of the reactor 52 transmits a temperature signal to the controller, and the heat dissipation backpack 3 moves to the circuit breaker 7 and the reactor 52 side to dissipate heat. The reciprocating movement enables the temperature of all parts in the converter to be balanced. When the converter stops operating, the heat dissipation backpack 3 is controlled by the controller to return to the initial position.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A heat dissipation device of a converter is characterized by comprising a rear back plate, a guide rail and a heat dissipation backpack; the rear back plate is positioned at the rear part of the electronic component of the converter, and the guide rail is arranged on the rear back plate; the number of the heat dissipation backpack is one, and the heat dissipation backpack can circularly dissipate heat of the electronic component along the guide rail in a reciprocating motion mode.

2. The converter heat sink of claim 1, wherein said heat sink backpack comprises a housing, a mounting bracket, and rollers; the fixed frame and the roller are fixed on the shell.

3. The converter heat sink of claim 2, wherein said mounting bracket is capable of mounting said heat sink backpack to said backplate; the roller is capable of moving along the guide rail.

4. The converter heat sink of claim 2, wherein said heat sink backpack further comprises a fan and an evaporator, said fan and said evaporator being disposed at two ends of said housing.

5. The converter heat sink of claim 2, wherein a controller is disposed on said mounting bracket, said controller being capable of controlling the position and speed of movement of said roller.

6. The converter heat sink of claim 1, wherein said rails are curvilinear in shape.

7. The converter heat dissipation device of any one of claims 1 to 6, further comprising a box, wherein the electronic component and the back plate are disposed in the box.

8. The converter heat sink of claim 7, wherein the interior of said case comprises a first receiving cavity and a second receiving cavity; the electronic component arranged in the first accommodating cavity comprises a capacitor, and the electronic component arranged in the second accommodating cavity comprises a reactor.

9. The converter heat sink of claim 8, wherein one or more temperature sensors are disposed in each of the first and second receiving cavities.

10. The converter heat sink of claim 9, wherein the temperature sensor is disposed at the top of the first and/or second receiving cavity or near the electronic component.

11. The converter heat sink of claim 8, wherein the guide rail passes through the first and second receiving cavities at corresponding locations on the backplate.

12. The converter heat sink of claim 8 wherein said rails are inserted at least once through said first receiving cavity at corresponding locations on said backplate.