KR20190098616A - Electric Dust Collection Device - Google Patents

Abstract

An electric precipitator according to an embodiment of the present invention comprises: a high voltage electrode to which high voltage is applied; a ground electrode grounded to form an electric field with the high voltage electrode; and a high voltage connection terminal for applying high voltage to the high voltage electrode. The high voltage electrode comprises: a plurality of high voltage plates each formed in a plate shape and arranged in parallel; and high voltage ribs connecting the plurality of high voltage plates. The high voltage connection terminal is located inside the high voltage rib.

Description

Electric Dust Collection Device {

The present invention relates to an electrostatic precipitator including a dust collecting unit for collecting charged dust particles.

In general, an electrostatic precipitator is a device installed in an air conditioner such as an air cleaner or a cooler or a heater to charge and collect dust particles contained in the air.

The electrostatic precipitator includes a charging unit that largely forms an electric field, and a dust collecting unit in which dust particles charged by the charging unit are collected. While the air passes through the dust collecting unit after passing through the charging unit, dust in the air is collected in the dust collecting unit.

The dust collecting unit is grounded with a high voltage electrode to which a high voltage is applied, and the ground electrodes forming a high voltage electrode and an electric field are arranged in parallel with each other in a plate shape.

The high voltage electrode of the prior art is composed of a high voltage plate arranged in parallel with each other and a rib connecting the high voltage plates to each other. Terminals for supplying power for applying external power to the plurality of high voltage plates are attached to the outer surface of the ribs.

The high voltage plate, ribs and terminals are made of different materials. In particular, the terminal includes a metal, but when the terminal is exposed to the outside of the rib, there is a problem that the electric field becomes uneven and sparks are generated near the terminal.

Such sparks cause a fire and reduce the reliability of the electrostatic precipitator.

The problem to be solved by the present invention is to provide an electrostatic precipitator that effectively reduces dust particles, reduces the risk of sparking, and reduces the risk of fire.

Another problem to be solved by the present invention is to provide a charging unit and an electrostatic precipitator while effectively charging the dust particles in the air through corona discharge, while increasing energy efficiency and reducing ozone.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the electrostatic precipitator according to the embodiment of the present invention is characterized in that a high voltage connection terminal for supplying a high voltage to the high voltage electrode is disposed inside the high voltage rib.

In addition, the embodiment includes a high voltage electrode to which a high voltage is applied, a ground electrode that is grounded to form an electric field with the high voltage electrode, and a high voltage connection terminal that applies a high voltage to the high voltage electrode, wherein the high voltage electrode is formed in a plate shape. And a high voltage rib connecting the plurality of high voltage plates and the plurality of high voltage plates arranged in parallel.

The high voltage rib is disposed to surround the high voltage connection terminal on a cross section that crosses the longitudinal direction of the high voltage connection terminal.

The high voltage connection terminal may include a metal, and the high voltage rib may include a semi-insulating resin.

The embodiment may further include a high voltage exposure terminal connected to one end of the high voltage connection terminal and at least partially exposed to the outside of the high voltage rib.

The housing includes a receiving groove accommodating the high voltage exposed terminal exposed to the outside of the high voltage rib, and a housing terminal disposed in the accommodating groove and in contact with the high voltage exposed terminal received in the accommodating groove. Can be.

The embodiment may further include a positioning unit disposed to surround the high voltage connection terminal and determining a position of the high voltage connection terminal inside the high voltage rib.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the charging unit and the electrostatic precipitating device of the present invention has one or more of the following effects.

First, since the high-voltage connector of the rapid material for supplying the high voltage is buried in the high voltage rib, the electric field distribution in the surroundings becomes uniform, thereby reducing the occurrence of spark in the high voltage electrode and improving the reliability of the dust collector.

Second, the high voltage connection terminal and the high voltage rib is manufactured by insert injection molding, there is an advantage to reduce the manufacturing process.

Third, since the high voltage exposure terminal connected to the high voltage connection terminal is exposed to the outside of the high voltage rib and is received and coupled to the housing groove of the housing, the high voltage exposure terminal is prevented from being exposed to the outside through the housing to reduce the occurrence of sparks and high voltage. There is an advantage that the exposed terminal can be easily connected to an external power source.

Fourth, having a predetermined width of the counter electrode, the lower portion of the counter electrode gradually decreases in width on a cross-section parallel to the air flow direction as it proceeds in the downstream direction of the air flow direction, so that the flow rate of air flowing into the charging space is In addition, since the distance between the discharge electrode and the charging surface is reduced, the charging probability of dust particles in the air is increased, and the air discharged from the charging unit forms an axial flow, thereby improving dust collection efficiency.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing an electrostatic precipitator according to an embodiment of the present invention.
2 is a cross-sectional view showing an electrostatic precipitator according to an embodiment of the present invention.
3 is a perspective view illustrating a frame to which the counter electrode illustrated in FIG. 1 is fixed.
4 is a partial cross-sectional view showing the structure of the charging unit shown in FIG.
5 is a conceptual diagram of a dust collecting unit according to an embodiment of the present invention.
6 is an exploded perspective view of a dust collecting unit according to an embodiment of the present invention.
FIG. 7 is a perspective view of the high voltage electrode shown in FIG. 6.
FIG. 8 is a cross-sectional view taken along line AA of FIG. 7.
9 is a diagram showing an electric field distribution of a comparative example.
10 is a diagram showing the electric field distribution of the embodiment.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size and area of each component does not necessarily reflect the actual size or area.

In addition, the angle and direction mentioned in the process of describing a structure in the Example are based on what was described in drawing. In the description of the structure of the display device in the specification, if the reference point and the positional relationship with respect to the angle is not clearly mentioned, refer to the related drawings.

The electrostatic precipitator of the present invention can be used as a partial device in an air conditioner, an air cleaner or a vacuum cleaner. Hereinafter, an embodiment used as an independent electrostatic precipitator will be described, but it is not necessarily limited thereto.

Referring to the reference direction expressed throughout the description and drawings as follows. The U direction means the upward direction or the upstream direction, the D direction means the downward direction or the downstream direction, the X axis direction means the longitudinal direction, and the Y axis direction means the width direction.

In the present embodiment, the X-axis direction and the Y-axis direction are described as being perpendicular to the up-down direction (U, D), but the X-axis direction or the Y-axis direction is inclined at an angle other than the vertical direction (U, D). Can lose. However, it is preferable that the X-axis direction and the Y-axis direction are perpendicular to each other.

The X-axis direction and the Y-axis direction can be comprehensively defined in the horizontal direction, and the plane formed by the X-axis and the Y-axis can be defined in the horizontal plane.

The potential represented by the following means electrical potential energy. 'Voltage' expressed below means a numerical value representing the difference between the potentials of two points.

Hereinafter, an electrostatic precipitator according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is a cross-sectional conceptual view showing an electrostatic precipitator according to an embodiment of the present invention.

Electrostatic precipitator according to an embodiment of the present invention, the case 10 to form the appearance of the electrostatic precipitator, the charging unit 20 for charging the dust particles in the air, and the dust particles charged in the charging unit 20 The dust collecting unit 40 includes a dust collecting unit.

The case 10 may include a charging case 11 for forming a space for accommodating the charging unit 20 therein, and a housing for forming a space for accommodating the dust collecting unit 40 therein. The space accommodating the charging unit 20 and the space accommodating the dust collecting unit 40 are formed to be connected to each other.

In the present embodiment, the charging case 11 is disposed at the upper side and the housing is disposed at the lower side, the charging unit 20 is disposed at the upper side, and the dust collecting unit 40 is disposed at the lower side of the charging unit 20. It is not limited to this.

In the case 10, an air inlet 15 through which air containing dust particles flows is formed, and an air outlet 17 through which air inside the case 10 flows out is formed. The air inlet 15 and the air outlet 17 may be formed in plural numbers. In this embodiment, the air inlet 15 is formed on the upper surface of the charging case 11, the air outlet 17 is formed on the lower surface of the dust collecting case 12, but is not necessarily limited thereto.

Looking at the overall air flow direction (A) is as follows. Air is introduced into the case 10 through the air inlet 15. The air introduced into the inner space of the case 10 through the air inlet 15 is sequentially passed through the charging unit 20 and the dust collecting unit 40, and then flows out through the air outlet 17. In another embodiment, the arrangement of the charging unit 20 and the dust collecting unit 40 may be reversed, and the charging unit 20 and the dust collecting unit 40 may be arranged vertically, in which case the air is charged. 20 is set to be the direction toward the dust collecting unit 40.

Specifically, the air flow direction (A) is in the up and down direction, the charging unit 20 is disposed upstream of the air flow direction (A) than the dust collecting unit (40). The charging unit 20 and the dust collecting unit 40 are arranged to define a surface intersecting with the air flow direction (A).

2 is a perspective view showing the structure of the charging unit 20 shown in Figure 1, Figure 3 is an exploded perspective view showing the structure of the charging unit 20 shown in Figure 1, Figure 4 is a charging unit ( 20 is a partial cross-sectional view showing the structure of 20).

2 to 4, the charging unit 20 according to an embodiment of the present invention is spaced apart from the counter electrode 222 and the counter electrode 222, and generates a corona discharge between the counter electrode 222. And a discharge electrode 240 for charging dust in the air.

The counter electrode 222 generates a corona discharge between the discharge electrode 240 and the discharge electrode 240. The material of the discharge electrode 240 may include at least one of a conductive metal, a conductive resin containing an appropriate amount of conductive material in the polymer resin, and a plating resin plating the surface of the polymer resin.

The counter electrode 222 is disposed in parallel with the air flow direction to efficiently charge the dust in the air while passing the air containing the dust therein, and the discharge electrode 240 is disposed on an arbitrary horizontal plane intersecting the air flow direction. It is arranged to wrap. The closed space formed in the horizontal plane of the counter electrode 222 is defined as the charging space 221.

That is, the counter electrode 222 has an open shape in the vertical direction, which is the air flow direction (A). In detail, in the horizontal cross section, the counter electrode 222 may have a polygonal or circular structure. Preferably, the counter electrode 222 in the horizontal cross section preferably has a hexagonal to 12-sided structure. This is to prevent the charging efficiency from being lowered by forming a space between the adjacent charging spaces 221 while forming a plurality of charging spaces 221 on the surface intersecting the air flow direction (A).

In detail, the plurality of counter electrodes 222 defines one counter electrode assembly 220. The counter electrode assembly 220 has a structure in which a plurality of counter electrodes 222 are connected to form a plurality of charging spaces 221. The counter electrode assembly 220 facilitates coupling the plurality of counter electrodes 222 with other configurations and arrangements.

For example, in the horizontal cross section, the counter electrode assembly 220 may have a counter electrode 222 in a honeycomb form to form a plurality of charging spaces 221. In this case, the counter electrodes 222 adjacent to each other may be contacted or coupled to one surface of each other, but at least one surface may be shared with each other in order to reduce manufacturing costs. When the counter electrode 222 is formed in a circular shape, a gap is generated between the counter electrodes 222 adjacent to each other. Therefore, as described above, the counter electrode 222 preferably has a hexagonal structure to a hexagonal structure.

A high voltage is applied to the discharge electrode 240. The high voltage is such that the voltage between the discharge electrode 240 and the counter electrode 222 is very high, so that discharge occurs in the discharge electrode 240. The discharge electrode 240 may be arranged in plurality. In detail, the number of discharge electrodes 240 corresponds to the number of charging spaces 221 of the counter electrode 222.

Preferably, the plurality of discharge electrodes 240 may be spaced apart from each other at regular intervals on the horizontal plane (X-Y) intersecting the air flow direction (A).

The material of the discharge electrode 240 may include at least one of a conductive metal, a conductive resin containing an appropriate amount of conductive material in the polymer resin, and a plating resin plating the surface of the polymer resin.

When a voltage is applied to the discharge electrode 240, corona discharge is generated in the charging space 221 between the discharge electrode 240 and the counter electrode 222. Dust particles in the air are charged while passing through the charging unit 20.

The discharge electrode 240 has a wire shape extending in a direction parallel to the air flow direction A in order to form an optimal electric field in the charging space 221 and induce stable ion generation. When the discharge electrode 240 has a wire shape, the distance from the counter electrode 222 which is formed to be close to the circular shape is maintained almost constant on some surface, thereby inducing a stable corona discharge.

As the thickness of the wire-shaped discharge electrode 240 is thinner, corona discharge is more likely to occur. Structurally, when the thickness of the discharge electrode 240 is very thin, the rigidity is weak, and the relative position with the counter electrode 222 is deformed. Corona discharge may not occur.

In order to solve the above-described problem, the discharge electrode 240 of the embodiment has a needle shape in which one end of the cross-sectional area is gradually reduced. Therefore, a portion except one end of the discharge electrode 240 constrains the position of the discharge electrode 240 by the power supply and rigidity, and one end of the discharge electrode 240 causes efficient corona discharge.

Specifically, the lower end of the discharge electrode 240 is reduced in cross-sectional area as it proceeds in the downstream direction of the air flow direction (A). In particular, when the lower end of the discharge electrode 240 is directed in the downstream direction of the air flow direction A, the lower end of the discharge electrode 240 at the time of assembling with the frame 210 and the counter electrode 222 which will be described later is the counter electrode 222. ) Is located in the interior (charge space 221), there is an advantage that the lower end of the discharge electrode 240 or the lower position of the discharge electrode 240 is prevented from being deformed by an external impact.

For example, the discharge electrode 240 includes a body portion 241 and a head portion 242 having a reduced cross-sectional area.

The body 241 is connected to an external power source. The body 241 is connected to the head 242 to supply external power to the head 242. The body portion 241 extends in parallel with the air flow direction (A).

The body 241 may have various shapes. Preferably, the horizontal cross-sectional shape of the body portion 241 may have a circular or polygonal shape. More preferably, the horizontal cross-sectional shape of the body portion 241 may have a circular or polygonal shape corresponding to the cross-sectional shape of the counter electrode 222. Therefore, the distance between the outer surface of the body portion 241 and the counter electrode 222 can be kept constant anywhere in the body portion 241. The horizontal section of the body 241 is constant.

The body 241 may be a conductive material as a whole. As another example, the body 241 may include a core made of a conductive material and an insulation coating layer disposed to surround the core. In this case, the core is electrically connected to the head 242 and an external power source.

One end of the head portion 242 is connected to the body portion 241. Head portion 242 has a smaller horizontal cross-sectional area than body portion 241. As the head portion 242 moves away from the body portion 241, the cross-sectional area decreases. The head portion 242 has a needle shape, and an end of the head portion 242 forms a vertex 242a of the discharge electrode 240. The lower end of the discharge electrode 240 narrowly refers to the vertex 242a of the discharge electrode 240.

Hereinafter, a relative position between the discharge electrode 240 and the counter electrode 222 for efficient corona discharge and suppressing the generation of ozone will be described.

The lower end of the discharge electrode 240 is disposed in the center of the charging space 221. In detail, the vertex 242a of the discharge electrode 240 is disposed at the center of the charging space 221. Here, the center of the charging space 221 means a space located within a predetermined error range from the center of the three-dimensional charging space 221. For example, the center of the charging space 221 coincides with the center of the mathematical charging space 221 or includes a range having an error of 0 to 5%.

When the apex 242a of the discharge electrode 240 is disposed at the center of the charging space 221, a gap between the apex 242a of the discharge electrode 240 and one point of the counter electrode 222 which is likely to cause a corona discharge is generated. The distance is constant. Accordingly, there is an advantage that the corona discharge is efficiently generated between the vertex 242a of the discharge electrode 240 and the counter electrode 222.

In detail, as illustrated in FIG. 4, the lower end of the discharge electrode 240 overlaps the center portion C2 of the counter electrode 222 in the horizontal direction. In detail, the discharge electrode 240 overlaps the upper portion d1 of the counter electrode 222 divided in the vertical direction and does not overlap the lower portion d2 of the counter electrode 222. The vertex 242a of the discharge electrode 240 overlaps the boundary between the upper portion d1 of the counter electrode 222 and the lower portion d2 of the counter electrode 222. The height h1 of the counter electrode 222 is usually 7 mm to 15 mm.

The frame 210 accommodates the counter electrode assembly 220 therein and constrains the plurality of discharge electrodes 240 and the connection electrodes 230. The frame 210 is defined of the accommodation space 211a therein. Specifically, the frame 210 has a form that is open in the vertical direction.

The frame 210 is formed of a synthetic resin material which is an insulating material so as to restrain the counter electrode assembly 220 and the discharge electrode 240 by having a constant rigidity, and to suppress the discharge and other components than the discharge electrode 240.

For example, the frame 210 may be coupled to the upper frame 212 and the lower frame 211 to define an accommodation space 211a therein. The lower frame 211 is opened in the vertical direction and has a flange 211b supporting the edge of the counter electrode assembly 220.

The upper frame 212 is coupled to the lower frame 211 to define an accommodating space 211a therein and restrains the counter electrode assembly 220 positioned therein. In detail, the upper frame 212 may include a first upper frame 213 having an open center, and a second upper frame 215 having both ends connected to surfaces facing each other of the first upper frame 213. ).

The second upper frame 215 constrains the positions of the discharge electrode 240 and the connection electrode 230, and insulates the discharge electrode 240 and the other portion from the counter electrode 222. The second upper frame 215 has a line shape that connects central portions of the charging space 221.

The second upper frame 215 fixes the position of the discharge electrode 240. In detail, the discharge electrode 240 penetrates through the second upper frame 215 and is exposed to the accommodation space 211a. Specifically, the lower ends of the plurality of discharge electrodes 240 and the counter electrode assembly 220 are disposed in the receiving space 211a in the frame 210, and the upper ends of the connection electrodes 230 and the plurality of discharge electrodes 240 are formed. It is disposed outside the accommodation space 211a.

The upper ends of the plurality of discharge electrodes 240 are disposed outside the accommodating space 211a, and are electrically connected to the connection electrodes 230 disposed outside the accommodating space 211a.

The connection electrode 230 is electrically connected to the plurality of discharge electrodes 240. The connection electrode 230 is connected to an external power source to supply a high voltage to the plurality of discharge electrodes 240. The connection electrode 230 is electrically connected to the plurality of discharge electrodes 240 and must be insulated from the counter electrode assembly 220. Therefore, an insulator disposed between the counter electrode assembly 220 and the connection electrode 230 may be disposed. In this embodiment, a portion of the frame 210, which is an insulating material, replaces the role of the insulator without disposing an insulator.

The connection electrode 230 may include a plurality of branch portions 231 in which the plurality of discharge electrodes 240 are positioned, and a connection portion 232 connecting the plurality of branch portions 231 to each other.

The connection electrode 230 may be disposed on the upper frame 212. Specifically, a portion of the frame 210 is disposed between the connection electrode 230 and the counter electrode 222 to insulate the connection electrode 230 and the counter electrode 222.

For example, the connection electrode 230 may be disposed on the outer surface of the frame 210. Branch portions 231 of the connecting electrode 230 are positioned in the electrode groove 215a formed on the upper surface of the second upper frame 215, and the connecting portion 232 is disposed on the upper surface of the first upper frame 213. It may be located in the groove formed.

For another example, the connection electrode 230 may include a conductive paste coated on the outer surface of the frame 210. The connection electrode 230 may include a conductive paste coated on the upper surface of the upper frame 212.

The dust collecting unit 40 forms an electric field to collect charged foreign matter. The dust collecting unit 40 collects the foreign matter charged by the electrostatic force by applying a voltage. The dust collecting unit 40 is disposed inside the case 10. The dust collecting unit 40 is coupled to the inside of the case 10.

The dust collecting unit 40 is disposed on the downstream side of the charging unit based on the air flow in the case 10. The dust collecting unit 40 is connected to a high voltage power supply unit for applying a high voltage and a ground part to be grounded.

5 is a conceptual diagram of a dust collecting unit 40 according to an embodiment of the present invention, Figure 6 is an exploded perspective view of a dust collecting unit 40 according to an embodiment of the present invention.

5 and 6, the dust collecting unit 40 according to an embodiment of the present invention includes a high voltage electrode 410 to which a high voltage is applied, and a ground electrode to be grounded to form the high voltage electrode 410 and an electric field. 420 and a high voltage connecting terminal 415 for applying a high voltage to the high voltage electrode 410.

The high voltage electrode 410 is composed of a plurality of high voltage plates 413 formed in a plate shape and arranged in parallel, and a high voltage rib 411 connecting the plurality of high voltage plates 413. The plurality of high voltage plates 413 and the high voltage ribs 411 are integrally formed. The high voltage electrodes 410 and the high voltage rib 411 extend in a direction crossing each other.

The ground electrode 420 is composed of a plurality of ground plates 423 formed in a plate shape and arranged in parallel, and ground ribs 421 connecting the plurality of ground plates 423. The ground plates 423 and the ground ribs 421 are integrally formed.

The high voltage connection terminal 415 is formed of a metal material and is electrically connected to an external high voltage power source. When the high voltage connection terminal 415 is made of a metal material and is coupled to the outside of the high voltage rib 411 of the high voltage electrode 410, sparks are generated around the high voltage connection terminal 415, resulting in a fire. This reduces the reliability of the dust collector.

The arrangement of the high voltage connection terminal 415 of the present invention to reduce sparks generated around the high voltage connection terminal 415 will be described later with reference to FIGS. 7 and 8.

Each of the plurality of high voltage plates 413 is disposed between each of the plurality of ground plates 423. The plurality of high voltage plates 413 of the high voltage electrode 410 and the plurality of ground plates 423 of the ground electrode 420 are alternately arranged at equal intervals. Each of the plurality of high voltage plates 413 forms an electric field with each of the plurality of ground electrodes 420 disposed therebetween.

In this embodiment, the high voltage electrode 410 is a semiconductive polymer (semi-insulating resin) having a surface resistance of 10 ⁹ / sq to 10 ¹² / sq, and has both hygroscopicity and conductivity. The high voltage electrode 410 is formed by mixing an antistatic polymer with a thermoplastic polymer. The high voltage electrode 410 controls the type and compounding amount of the antistatic polymer so that the surface resistance is in the range of 10 ⁹ / sq to 10 ¹² / sq.

The thermoplastic polymer may be ABS (Acrylonitrile butadiene styrene), polyethylene-based, polystyrene-based, or polyvinyl chloride-based. In the present embodiment, the thermoplastic polymer is preferably ABS having excellent heat resistance and impact resistance, easy molding, and good compatibility with the antistatic polymer.

The antistatic polymer is mixed with the thermoplastic polymer to impart hygroscopicity and conductivity and to control surface resistance. In general, the antistatic agent is used to control the surface resistance in order to prevent the static electricity generated in the polymer, such as plastic. In the present embodiment, using the antistatic polymer of the polymer type antistatic agent of the antistatic agent to increase the compatibility, to prevent the degradation of the physical properties to secure the mechanical strength, to ensure hygroscopicity and conductivity, to prevent sparks and to control the surface resistance. As the antistatic polymer, polyamide 6 (PA6), polypropylene or ABS may be used.

The dust collecting electrode and the high voltage electrode 410 may be accommodated in the housing 430. Of course, it may be directly coupled to or accommodated in the case 10 without a separate housing 430.

Hereinafter, the structure of the dust collector according to an embodiment of the present invention for reducing the spark generated around the high voltage connection terminal 415 will be described.

FIG. 7 is a perspective view of the high voltage electrode 410 shown in FIG. 6, and FIG. 8 is a cross-sectional view taken along the line A-A of FIG. 7.

7 and 8, the high voltage connection terminal 415 is positioned inside the high voltage rib 411. The high voltage connection terminal 415 extends in parallel with the high voltage rib 411. When the high voltage connection terminal 415 is positioned inside the high voltage rib 411, the high voltage connection terminal 415 is not exposed to the outside, so that no spark is generated and the electric field distribution in the surroundings is uniform.

Here, since the high voltage rib 411 is a semi-conductive resin, it is possible to alleviate the spark generated from the high voltage connection terminal 415 which is a metal material having excellent conductivity.

The high voltage connection terminal 415 extends in the longitudinal direction of the high voltage rib 411. Preferably, the inside of the high voltage connection terminal 415 has a length similar to or smaller than the length of the high voltage connection terminal 415. Therefore, a high voltage is applied to the high voltage rib 411 in contact with the high voltage connection terminal 415.

Specifically, the high voltage rib 411 is disposed to surround the high voltage connection terminal 415 on the cross section that crosses the longitudinal direction of the high voltage connection terminal 415. It is preferable that the cross-sectional shape of the high voltage rib 411 is square, and the cross section of the high voltage connection terminal 415 is circular.

Further, in the cross section perpendicular to the longitudinal direction of the high voltage connection terminal 415, the center of the high voltage connection terminal 415 may be located at the center of the high voltage rib 411. When the high voltage connection terminal 415 is disposed at the center of the high voltage rib 411, the high voltage supplied from the high voltage connection terminal 415 may be evenly transmitted to the high voltage rib 411.

There are no limitations on the method of forming the high voltage electrode 410 and the high voltage connection terminal 415, but the high voltage connection terminal 415 and the high voltage rib 411 may be formed by insert injection. That is, when the high voltage connection terminal 415, the high voltage rib 411, and the high voltage plate 413 are formed together by insert injection, a manufacturing cost and a manufacturing step can be reduced.

When the high voltage connection terminal 415, the high voltage rib 411, and the high voltage plate 413 are manufactured for insert injection, the position of the high voltage connection terminal 415 is changed or bent due to the pressure of the resins of the high voltage rib 411. Problems may arise.

In order to prevent misalignment caused when the high voltage connecting terminal 415, the high voltage rib 411 and the high voltage plate 413 are inserted into the insert, the position of the high voltage connecting terminal 415 is fixed within the high voltage rib 411. The positioning unit 414 may further include.

The positioning unit 414 surrounds the high voltage connection terminal 415 and determines the position of the high voltage connection terminal 415 inside the high voltage rib 411. The positioning unit 414 has a smaller length than the high voltage connecting terminal 415 and the high voltage rib 411. A portion of the outer surface of the positioning unit 414 may be located at the same height as the outer surface of the high voltage rib 411. Accordingly, the positioning unit 414 is fixed to the frame in which the high voltage rib 411 is formed.

When the positioning unit 414 is formed of the same material as the high voltage rib 411, sparks may occur due to the spacing of double injection, and thus the positioning unit 414 has a low melting point lower than that of the high voltage rib 411. It is preferable that it is resin.

When an external power source is connected to the high voltage connection terminal 415, it may be connected by an electric wire. It may further include a high voltage exposure terminal 419 for supplying a high voltage of the power source.

The high voltage exposure terminal 419 is connected to one end of the high voltage terminal and penetrates the high voltage rib 411 to expose at least a portion of the high voltage rib 411 to the outside. Specifically, the high voltage exposure terminal 419 extends in the longitudinal direction of the high voltage rib 411 at one end in the longitudinal direction of the high voltage rib 411.

The high voltage exposure terminal 419 may be connected to an external power source by the housing terminal 440 formed in the housing 430 or the case 10. The external power source applies a high voltage to the high voltage connection terminal 415 through the housing terminal 440 and the high voltage exposure terminal 419.

For example, the housing 430 is disposed in the accommodating groove 430a for accommodating the high voltage exposed terminal 419 exposed to the outside of the high voltage rib 411 and in the accommodating groove 430a. And a housing terminal 440 in contact with the high voltage exposure terminal 419 accommodated in the accommodation groove 430a.

The receiving groove 430a has a shape corresponding to the high voltage exposure terminal 419 exposed to the outside of the high voltage rib 411. An inner surface of the accommodation groove 430a and one surface of the high voltage rib 411 around the fixed pressure exposure terminal may define a closed space accommodating the high voltage exposure terminal 419 therein. That is, one surface of the housing 430 around the receiving groove 430a and one surface of the high voltage rib 411 around the high voltage exposure terminal 419 are in contact with each other to isolate the high voltage exposure terminal 419 from the outside.

The housing terminal 440 is connected to an external power source and is in contact with the high voltage exposure terminal 419. The housing terminal 440 is formed in a ring shape surrounding the high voltage exposure terminal 419 at a surface intersecting in the longitudinal direction of the high voltage exposure terminal 419. The high voltage exposure terminal is coupled to the housing terminal 440 by an interference fit method.

When the high voltage exposure terminal 419 is accommodated in the receiving groove 430a of the housing 430 and is in contact with the housing terminal 440 to receive external power, the high voltage is applied to the high voltage connecting terminal 415 while being made of a metallic material. The terminals of are not exposed to the outside, there is an advantage that the spark generation is reduced.

Of course, the above-described receiving groove 430a is formed in the case 10 and the housing 430 may be omitted.

Meanwhile, in order to reduce sparking in one region of the high voltage plate 413 adjacent to the high voltage rib 411, the connection portion 413b connected to the high voltage rib 411 may have a smaller width than the other portion 413a. .

9 is a view showing the electric field distribution of the comparative example, Figure 10 is a view showing the electric field distribution of the embodiment.

9 and 10 are experiments performed in the same state except for the position of the high voltage connection terminal 415.

Referring to FIG. 9, in the comparative example, the high voltage connection terminal is exposed to the outside of the high voltage rib. In the comparative example, the electric field distribution is concentrated around the high voltage connection terminal, and sparks are very likely to occur.

Referring to FIG. 10, in the embodiment, the high voltage connection terminal 415 is in the high voltage rib 411. In the embodiment, since the electric field distribution is not concentrated around the high voltage connection terminal 415 and uniformly distributed, the possibility of sparking is very low.

Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

10: case 11: charging case
12: dust collecting case 15: air inlet 17: air outlet 20: charging unit
40: dust collecting unit

Claims (10)

A plurality of high voltage plates to which a high voltage is applied and arranged in parallel, respectively;
A high voltage electrode connecting a plurality of high voltage plates and including a high voltage rib extending in a direction crossing the plurality of high voltage ribs;
Grounded to form an electric field with the high voltage electrode, each of which is disposed in parallel, and includes a plurality of ground plates disposed between the plurality of high voltage plates, and ground ribs connecting the plurality of ground plates (a ground electrode; And
A high voltage is applied to the high voltage electrode, and includes a high voltage connecting terminal extending in parallel with the high voltage rib.
And the high voltage connection terminal is located inside the high voltage rib. The method of claim 1,
And the high voltage connecting terminal and the high voltage rib are formed by insert injection. The method of claim 1,
And the high voltage rib is disposed to surround the high voltage connecting terminal on a cross section that crosses the longitudinal direction of the high voltage connecting terminal. The method of claim 1,
The high voltage connection terminal comprises a metal,
The high voltage rib is an electrostatic precipitator including a semi-insulating resin. The method of claim 1,
And a high voltage exposure terminal connected to one end of the high voltage connecting terminal and at least partially exposed to the outside of the high voltage rib. The method of claim 5,
Further comprising a housing for receiving the high voltage electrode and the ground electrode,
The housing,
An accommodation groove accommodating the high voltage exposure terminal exposed to the outside of the high voltage rib;
And a housing terminal disposed in the accommodating groove and contacting the high voltage exposure terminal accommodated in the accommodating groove. The method of claim 1,
The high voltage plate,
An electrostatic precipitator having a smaller width than the other portion of the connection portion connected to the high voltage rib. The method of claim 1,
And a positioning unit disposed to surround the high voltage connecting terminal and determining a position of the high voltage connecting terminal inside the high voltage rib. The method of claim 8,
And the positioning unit comprises a low melting point resin having a lower melting point than the high voltage rib. The method of claim 1,
A plurality of counter electrodes disposed to face each other; And
And a charging unit spaced apart from the counter electrodes and disposed between the counter electrodes, the charging unit including a discharge electrode which generates a corona discharge between the counter electrodes and charges dust in the air.

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