JP2010058061A - Electrostatic precipitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic precipitator which keeps the insulation performance thereof even in a dusty environment to prevent degradation in the dust collection performance thereof. <P>SOLUTION: The electrostatic precipitator includes: an insulating material-made housing 1; an electrification part 100 in which a fine particle in the air is electrified by using a discharge wire 10, the support region 10A of which except for the discharge region 10B thereof is supported by the housing, and a counter ground electrode 50; and a dust collection part 200 in which an electric field is formed by using a high voltage electrode 60 supported by the housing and a low voltage electrode 70 and the electrified fine particle is made to pass through the formed electric field to attract/collect the electrified fine particle by electrostatic force. In the electrostatic precipitator, a discharge wire-supported portion (the periphery of a discharge wire support part 24 or that of a power feeding terminal 25 of the discharge wire) on the housing for supporting the support region of the discharge wire except for the discharge region thereof is covered with insulation covers 91, 92 which are arranged separately from the housing and used for preventing the intrusion of a wind from the outside. A power feeding member 65 is fit to a connection bar 62 of the high voltage electrode from the outside and an insulation cover 93 is arranged on the outside of the power feeding member, so that the high voltage electrode is supported by the housing while interposing the insulation cover and the power feeding member between them. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrostatic electrostatic precipitator.

Conventionally, a housing made of an insulating material that forms an air flow path, a charged portion that gives electric charge to fine particles (such as dust) in the air flowing inside the housing by a discharge line, and a charge that is given by the charged portion For example, Patent Document 1 discloses an electrostatic electrostatic precipitator including a dust collecting unit that attracts and collects fine particles between a high voltage electrode and a low voltage electrode by electrostatic force.
Japanese Patent No. 3688878

  By the way, in the conventional electrostatic precipitator, since the insulation performance between the part having a high voltage potential and the casing having the ground potential is not always sufficient, the part where the dust becomes a high voltage potential when used in a dusty place and the ground When it adheres between the part which becomes an electric potential, current leak generate | occur | produced through dust, and there existed a problem that the dust collection performance fell because of it.

  In consideration of the above circumstances, the present invention can sufficiently maintain the insulation performance even when used in a dusty environment, thereby preventing a decrease in the dust collection performance and extending the life. An object is to provide an electric dust collector.

  According to the first aspect of the present invention, a housing made of an insulating material, a discharge line in which a support region outside the discharge region is supported by the housing, and a counter earth electrode provided corresponding to the discharge wire are used in the air. An electric field is generated by a charging unit that charges the fine particles and a high-voltage electrode and a low-voltage electrode supported by the housing, and the charged fine particles pass through the electric field, so that the fine particles are adsorbed and captured by electrostatic force. An electrostatic precipitator having a dust collecting unit for collecting the discharge line supporting portion on the casing that supports a support area outside the discharge area of the discharge line, provided separately from the casing, It is characterized by being covered with an insulating cover that prevents the invasion of wind.

  The invention of claim 2 is the electrostatic precipitator according to claim 1, wherein both of the electric dust collectors are provided on a wall surface between the discharge line supporting part on the casing and a part on the casing having a ground potential. A recess for increasing the creeping distance between the parts or a hole for breaking the creeping surface is provided, and air flows into the recess or the hole in front of the flow direction of the air flow in the recess or the hole. An overhanging shielding wall for avoiding the above is provided.

  According to a third aspect of the present invention, there is provided an air supply comprising a casing made of an insulating material, a discharge line in which a support area outside the discharge area of the casing is supported, and a counter earth electrode provided corresponding to the discharge line. An electric field is generated by a charging portion that gives electric charge to the fine particles therein, and a high-voltage electrode and a low-voltage electrode supported by the casing, and the charged fine particles pass through the electric field, thereby In the electrostatic precipitator provided with a dust collection unit for adsorption and collection, each of the high-voltage electrodes is extended in the arrangement direction of the electrode plates, and a plurality of electrode plates arranged in parallel to each other at regular intervals. A connecting bar for connecting the end portions of the resin, and is formed as an integrally molded block of resin, and a power supply member for supplying power to each electrode plate through the connection bar is attached to the connection bar from the outside, Insulate the power supply member from the outside Chromatography is mounted, the high voltage electrode through the power supply member which is mounted on the insulating cover is characterized in that it is supported on the housing.

  A fourth aspect of the present invention is the electrostatic precipitator according to the third aspect, wherein a pair of the connecting bars are arranged in parallel to each other, and both ends of the electrode plates are coupled to the connecting bars. A plate and a connection bar are integrated, and the power supply member is mounted on each of the connection bars on both sides, and power is supplied to the electrode plate through both power supply members.

  A fifth aspect of the present invention is the electrostatic precipitator according to the third or fourth aspect, wherein at least one of the contact surfaces of the insulating cover and the casing has a rib for reducing a contact area between the insulating cover and the casing. The high-voltage electrode is supported by the housing through the insulating cover in a state where the other contact surface is in contact with the tip of the rib.

  The invention of claim 6 is the electrostatic precipitator according to any one of claims 3 to 5, wherein an unnecessary space inside the housing prevents air from flowing into a space around the power feeding member. It is characterized by being filled with spacers.

  The invention of claim 7 is the electrostatic precipitator according to any one of claims 3 to 6, wherein an insulating filler is filled between the power feeding member and the insulating cover. Features.

  According to the first aspect of the invention, the discharge cover can be prevented from being exposed to the outside by the function of the insulating cover, so that the discharge line support can be used even in a dusty environment. It becomes difficult to get dust on. Therefore, current leakage from the discharge line support site through the dust to the ground potential side can be prevented, dust collection performance can be prevented from being lowered, and the life of the apparatus can be extended.

  According to the invention of claim 2, a recess or creepage for increasing the creepage distance between the two parts is provided on the wall surface between the discharge line supporting part on the casing and the part on the casing that is grounded. Since the hole for discontinuation is provided, current leakage from the high potential side to the ground potential side can be reduced. In addition, air flow into these recesses and holes is prevented by overhanging shielding walls, so that dust adheres to the recesses and holes due to the air flow, and the creeping surface is short-circuited through the dust, causing current to flow. Leakage can be prevented from occurring. In addition, since the shielding wall is provided in an overhang shape, there is no problem of shortening the creepage distance through the shielding wall.

  According to the invention of claim 3, since the power supply member is covered with the insulating cover, even when used in a dusty environment, it is difficult for dust to adhere to the periphery of the power supply member. Current leakage from the high-voltage potential side to the ground potential side can be prevented, dust collection performance can be prevented from being lowered, and the life of the apparatus can be extended.

  According to the invention of claim 4, since the high voltage electrode is supported by the casing via the power supply members on both sides, the high voltage electrode and the casing do not directly contact each other, and the ground potential side (the casing) The direct current leakage to the body side) can be prevented, and the voltage drop of the high voltage electrode can be prevented. In addition, since power is supplied from both sides of each electrode plate, it is possible to supply power with a substantially uniform voltage to the end portions and the central portion of each electrode plate.

  According to the fifth aspect of the present invention, since the contact area between the casing and the insulating cover is provided with a rib, the contact area between the two can be reduced, so that the high-voltage potential component (high-voltage electrode, power supply member, insulating cover) is grounded. The current leakage path to the casing that becomes a potential can be limited to a small size, and even if dirt such as dust adheres to the peripheral portion, current leakage is less likely to occur.

  According to the invention of claim 6, since the spacer prevents the air from flowing into the space around the power supply member that supplies power to the high-voltage electrode, it is possible to prevent dust from adhering to the periphery of the power supply member. Current leakage through dust can be prevented.

  According to the invention of claim 7, since the outer surface of the power supply member is completely covered with the insulating filler without any gap, no dust is attached to the periphery of the power supply member, whereby the high-voltage potential side through the dust Current leakage to the ground potential side can be reliably prevented. Further, since the power feeding member can be completely shielded from the outside, the insulation can be further improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view of an electrostatic precipitator according to an embodiment of the present invention, FIG. 2 is a perspective view showing an assembled state before attaching covers of the electrostatic precipitator, and FIG. 3A is an electrostatic precipitator in the state of FIG. 3B is a cross-sectional view taken along the arrow IIIb-IIIb of FIG. 3A, FIG. 3C is a cross-sectional view taken along the arrow IIIb-IIIb according to the modification of FIG. 4A, and FIG. FIG. 5 is a perspective view showing a state in which an insulating cover is put on the discharge line supporting portion of the electrostatic precipitator in a state, FIG. 5 is a cross-sectional view of the electric precipitator in an assembled state, FIG. 6 is a diagram showing a main part of FIG. FIG. 8A is a perspective view showing an example of the cross-sectional shape of the rib shown in FIG. 6.

  This electric dust collector is used alone or mounted inside an air conditioner or the like to clean air. This electrostatic precipitator has a housing 1 that forms an air flow path. The housing 1 includes a main frame 2 and a subframe 3 coupled to the main frame 2, as shown in FIG. The upper cover 4 is attached to the subframe 3. The main frame 2, the sub frame 3, and the upper cover 4 are each formed of a molded product of insulating resin. The upper cover 4 of the present embodiment is used when the electric dust collector is used alone.

  In this electric dust collector, the charging unit 100 is provided on the upstream side in the air flow direction of the casing 1 composed of the main frame 2, the sub frame 3, and the upper cover 4 as described above, and the dust collecting unit is provided on the downstream side thereof. 200 is provided.

  The charging unit 100 includes a discharge line 10 and a counter earth electrode 50 provided in parallel to the discharge line 10, and is charged in the air by corona discharge generated by the discharge line 10 and the counter earth electrode 50. It fulfills the function of giving electric charge to fine particles.

  The dust collection unit 200 includes a high-voltage electrode 60 and a low-voltage electrode 70, generates an electric field by the high-voltage electrode 60 and the low-voltage electrode 70, and allows the charged fine particles to pass through the electric field. It functions to be adsorbed and collected by the low-voltage electrode 70 having the ground potential. In this case, the opposing ground electrode 50 and the low-voltage electrode 70 are configured as an integral ground electrode 80.

  The main frame 2 has a rectangular frame shape including a pair of long vertical frame portions 21 and a pair of short horizontal frame portions 22, and the subframe 3 is formed on the outer surface of the vertical frame portion 21 and the outer surface of the horizontal frame portion 22. An engagement protrusion 23 that fits into the engagement hole 33 is provided.

  Similar to the main frame 2, the sub frame 3 has a rectangular frame shape including a pair of long vertical frame portions 31 and a pair of short horizontal frame portions 32, and the vertical frame portion 31 and the horizontal frame portion 32 are respectively configured. An engaging hole 33 that fits into the engaging protrusion 23 of the main frame 2 is provided in the wall plate. Further, a spacer 36 for filling an unnecessary space to be described later is attached to the inner surface side of the vertical frame portion 31 integrally or separately from the vertical frame portion 31.

  The upper cover 4 has a lattice plate shape in which a large number of rectangular holes 41 through which air flows are formed, and is fixed to the upper end of the subframe 3.

  As shown in FIGS. 1 to 3, discharge line support portions 24 for supporting the discharge lines 10 are provided on the upper surfaces of both horizontal frame portions 22 of the main frame 2, and these discharge line support portions 24. The discharge line 10 is stretched between the one and the other horizontal frame portion 22 by spanning the discharge line 10 while supporting it. Further, both ends of the discharge wire 10 are fixed to the discharge wire support 24 on the one horizontal frame portion 22 via the spring 11, and the discharge wire 10 is stretched without slack by these springs 11. .

  One end of the discharge line 10 fixed on one horizontal frame portion 22 is connected to a discharge line power supply terminal 25 provided at one end on the horizontal frame portion 22, and this discharge line power supply terminal 25. The discharge line 10 receives power from the outside.

  Further, as shown in FIG. 2, a high voltage power supply terminal 26 for supplying power to the high voltage electrode 60 is provided at the other end of the same horizontal frame portion 22, and a ground electrode 80 is provided at the other horizontal frame portion 22. A grounding terminal 27 connected to is provided.

  As shown in FIG. 1, the discharge line 10 includes a support area 10 </ b> A supported by the discharge line support part 24 on the horizontal frame part 22 and a discharge area 10 </ b> B stretched in the air between the horizontal frame parts 22. It is divided into and. The support region 10A is a portion that is not directly involved in giving a charge to the fine particles in the air. If the support region 10A is exposed to the outside, dust is attached to the support region 10A, which is not preferable.

  Therefore, as shown in FIG. 4, the horizontal frame including the discharge line support portion 24 on the main frame 2 supporting the support region 10 </ b> A of the discharge line 10, the discharge line power supply terminal 25 that supplies power to the discharge line 10, and the like. A part on the portion 22 (hereinafter, referred to as a discharge line support part) is covered with insulating covers 91 and 92 prepared separately from the housing 1 so as to prevent as much external wind as possible from entering the part. The insulating covers 91 and 92 are formed in such a size that the high-voltage power supply terminal 26 on one horizontal frame portion 22 and the ground terminal 27 on the other horizontal frame portion 22 are not covered.

  Further, as shown in FIG. 3B, the discharge line support part (the periphery of the discharge line support part 24) on the horizontal frame part 22 of the main frame 2 and the part (the ground terminal 26) on the main frame 2 that becomes the ground potential. A hole 122 for breaking the creeping surface for increasing the creeping distance between the two parts is provided on the wall surface between the hole 122 and the air flow direction (arrow A). An overhanging shielding wall 123 is provided on the front side of the direction) to avoid air flowing into the hole 122. The hole 122 is located above the lower end of the shielding wall 123. As shown in FIG. 3C, as a modification of this embodiment, a recess 122 a may be provided instead of the hole 122.

  Further, as shown in FIG. 1, the main frame 2 has a step portion 28 for placing the high voltage electrode 60 on the inner surface of the vertical frame portion 21 and a ground electrode 50 for supporting the ground electrode 50 on the inner surface of the horizontal frame portion 22. A receiving portion 29 is provided.

  As shown in FIG. 1, the high-voltage electrode 60 includes a plurality of electrode plates 61 arranged in parallel to each other at regular intervals in the extending direction of the vertical frame portion 21 of the main frame 2, and the arrangement direction of the plurality of electrode plates 61. Are formed as a semi-insulating resin integral molding block having a connecting bar 62 that extends to the end of each electrode plate 61 and connects both ends of each electrode plate 61, and a conductive film is formed thereon. It is formed in a size that can be accommodated inside.

  A pair of connecting bars 62 are arranged on both sides of the electrode plate 61 in parallel with each other. By connecting both ends of each electrode plate 61 to the connecting bar 62, the electrode plate 61 and the connecting bar 62 are integrated. ing. As shown in FIGS. 5 and 6, power supply members 65 are respectively attached to the connecting bars 62 on both sides over the entire length. Both power supply members 65 are electrically connected to the high voltage power supply terminal 26, and are supplied with power uniformly from both sides of each electrode plate 61 via both power supply members 65.

  The high-voltage electrode 60 is supported by the main frame 2 by placing the connecting bars 62 on both sides on the step portion 28 on the inner surface of the vertical frame portion 21 of the main frame 2 via the power supply member 65. Note that the connecting bar 62 has a hat-shaped cross-sectional shape with protruding flanges on both upper and lower sides, and a feeding member 65 having a U-shaped cross-section is fitted to a rectangular cross-section portion in front of the flange. That is, if the power supply member 65 has a U-shaped cross section, the power supply member 65 and the electrode plate 71 of the low-voltage electrode 70 described later may approach and spark, but the connecting bar 62 of the high-voltage electrode 60 has a hat shape. In order to prevent sparks.

  Thus, by forming the power supply member 65 in a U-shaped cross section and forming the connecting bar 62 in a hat-shaped cross section having a flange, it is possible to prevent spark without increasing the interval between the low voltage electrodes 70, Unpleasant crackling noise can be prevented. Therefore, the overall size of the apparatus can be reduced while increasing the dust collection area of the low-voltage electrode 70.

  Further, outside each power supply member 65, an insulating cover 93 having a U-shaped cross section is provided so as to be interposed between the power supply member 65 and the main frame 2 and cover the power supply member 65. The connecting bar 62 of the high-voltage electrode 60 is placed on the step portion 28 of the main frame 2 via the power supply member 65 and the insulating cover 93. In this state, the insulating cover 93 contacts the upper surface of the step portion 28 of the main frame 2 and also contacts the inner wall surface of the vertical frame portion 21 of the main frame 2. If the contact area in that case is large, a leakage current tends to flow from the high voltage side (power supply member 65, high voltage electrode 60, etc.) to the main frame 2 side that is at the ground potential.

  Therefore, as shown in an enlarged view in FIG. 6, ribs 28 a and 28 b for reducing the contact area between the insulating cover 93 and the main frame 2 are projected from at least one of the contact surfaces of the insulating cover 93 and the main frame 2. The high voltage electrode 60 is supported by the main frame 2 via the insulating cover 93 and the power supply member 65 in a state where the other contact surface is in contact with the tips of the ribs 28a and 28b.

  In the case of this embodiment, as shown in FIG. 8, the ribs 28 a and 28 b are provided on the contact surface side of the main frame 2. Further, the ribs 28a and 28b have a triangular cross-section as shown in FIG. 8 (a), or FIG. 8 (a) so that the contact area of the ribs 28a and 28b to the insulating cover 93 is made as small as possible. It is formed in a semicircular shape as shown in b).

  Further, as shown in FIG. 1, the ground electrode 80 is formed of a resin so that the low-voltage electrode 70 constituting the dust collecting unit 200 and the counter earth electrode 50 constituting the charging unit 100 are integrated back to back. The surface is plated to make a conductor. Note that the ground electrode 80 may be made of a conductive resin (including a hygroscopic conductive resin) or a conductor, that is, a metal from the beginning.

  Of the portions constituting the ground electrode 80 as a whole, the low voltage electrode 70 is a lower half portion in which a large number of electrode plates 71 are arranged in parallel at the same pitch along the arrangement direction of the electrode plates 61 of the high voltage electrode 60. The counter ground electrode 50 is an upper half portion in which a plurality of electrode plates 51 are arranged in parallel at a constant pitch in a direction orthogonal to the lower low-voltage electrode 70.

  The electrode plate 71 of the outermost low-voltage electrode 70 also serves as the end face plate 81 of the ground electrode 80, and the ground electrode 80 is disposed on the outer surface of the end face plate 81 on the inner surface side of the horizontal frame portion 22 of the main frame 2. A convex portion 89 for mounting on the receiving portion 29 is provided. One end face plate 81 is provided with a bracket 86 (shown in FIG. 2 and the like) for connection to the ground terminal 27 on the main frame 2.

  The ground electrode 80 is attached to the main frame 2 by placing the convex portion 89 provided on the end face plate 81 on the receiving portion 29 of the main frame 2 and connecting the bracket 86 to the ground terminal 27.

  The above parts are attached in the following order. First, the high voltage electrode 60 is set in the main frame 2, and then the ground electrode 80 is set. Next, the discharge line 10 is set, and the insulating covers 91 and 92 are set thereon, and then the subframe 3 and the upper cover 4 are attached. As described above, the electric dust collector of the embodiment can be completed.

  In the assembled state, as shown in FIG. 3B, the electrode plates 61 of the high voltage electrode 60 and the electrode plates 71 of the low voltage electrode 70 are alternately arranged at a constant pitch. In addition, as shown in FIGS. 2 to 5, the discharge line 10 is positioned in the middle of the electrode plate 51 of the counter earth electrode 50.

  As shown in FIG. 5, a spacer 36 is embedded in the unnecessary space inside the housing 1 to prevent air from flowing into the space around the power supply member 65 that supplies power to the high-voltage electrode 60.

  According to the electrostatic precipitator having the above configuration, the insulating cover 91, 92 covers the periphery of the discharge wire support 24 and the discharge wire power supply terminal 25 (corresponding to the discharge wire support portion) on the main frame 2. , 92 can prevent external wind from being applied to the discharge line supporting portion. Therefore, even when used in an adverse environment with a lot of dust, it is difficult for dust to adhere to the discharge line support part, and current leakage from the discharge line support part to the ground potential side through the dust can be prevented. A decrease in performance can be prevented, and the life of the apparatus can be extended.

  Moreover, according to the electric dust collector of this embodiment, as shown in FIG.3 (b), the discharge line support site | part (the periphery of the discharge line support part 24 or the discharge line electric power feeding terminal 25) on the main frame 2, ground potential, Since the hole 122 for interrupting the creeping surface is provided on the wall surface between the part on the main frame 2 (part close to the ground terminal 26), current leakage from the high potential side to the ground potential side is reduced. be able to. In addition, since air is prevented from flowing into the hole 122 by the overhanging shielding wall 123, dust adheres to the hole 122 by riding on the air flow, and the creeping surface is short-circuited through the dust, causing current leakage. Can be prevented. In addition, since the shielding wall 123 is provided in an overhang shape, the problem of shortening the creeping distance through the shielding wall 123 does not occur.

  Further, as shown in FIG. 3 (c), the discharge line support part (the periphery of the discharge line support part 24 and the discharge line power supply terminal 25) on the main frame 2 and the part (the ground terminal) on the main frame 2 that becomes the ground potential. Even when a concave portion 122a for increasing the creepage distance between the two parts is provided on the wall surface between the part and the part close to 26, current leakage from the high potential side to the ground potential side can be reduced. Moreover, since the air flow into the concave portion 122a is prevented by the overhanging shielding wall 123, dust adheres to the concave portion 122a by riding on the air flow, and the creeping surface is short-circuited through the dust, causing current leakage. Can be prevented as much as possible.

  Further, according to the electric dust collector of the present embodiment, since each power supply member 65 is covered with the insulating cover 93, even when used in a dusty environment, dust does not easily adhere to the periphery of the power supply member 65. As a result, current leakage from the high-voltage potential side to the ground potential side through dust can be prevented, the deterioration of dust collection performance can be prevented, and the life of the apparatus can be extended.

  Further, as shown in FIG. 5, since the high voltage electrode 60 is supported by the main frame 2 via the power supply members 65 on both sides, the main frame 2 and the high voltage electrode 60 are not in direct contact with each other. The direct current leakage from the side to the ground potential side (the housing 1 side) can be prevented, and the voltage drop of the electrode plate 61 of the high voltage electrode 60 can be prevented. In addition, since power is supplied from both sides of each electrode plate 61, power can be supplied with a substantially uniform voltage to the end portion and the central portion of each electrode plate 61.

  Further, as shown in FIG. 6, since the contact area between the main frame 2 and the insulating cover 93 is reduced due to the ribs 28a and 28b, the high voltage potential components (the high voltage electrode 60, the power feeding member) can be reduced. 65, the current leakage path from the insulating cover 93) to the housing 1 at the ground potential can be limited to a small size, and even if dirt such as dust adheres to the peripheral portion, current leakage is less likely to occur.

  Further, as shown in FIG. 5, the spacer 36 prevents air from flowing into the space around the power supply member 65 that supplies power to the high-voltage electrode 60, so that dust adheres to the periphery of the power supply member 65. It is possible to prevent current leakage through dust.

  Further, as shown in FIG. 7, an insulating cover 94 that is slightly larger than the connecting bar 62 and the power supply member 65 is placed on the outside of the power supply member 65, so that a gap between the power supply member 65 or the connection bar 62 and the insulating cover 94 is formed. You may make it fill with the insulating filler 95 (Preferably, resin, such as urethane, an epoxy, a silicon | silicone, Especially preferably, it is the San-Yuresin urethane compound resin UF-705 by San-Yurec Co., Ltd.). Since the outer surface of the power supply member 65 is completely covered with the insulating filler 95 without any gap, no dust is attached to the periphery of the power supply member 65, so that the high-voltage potential side through the dust moves to the ground potential side. Current leakage can be reliably prevented. Further, since the power supply member 65 and the connecting bar 62 can be completely shielded from the outside, the insulation can be further improved.

It is a disassembled perspective view of the electric dust collector of embodiment of this invention. It is a perspective view which shows the assembly state before attaching the covers of the electric dust collector. (A) is a plan view of the electrostatic precipitator in the state of FIG. 2, (b) is a cross-sectional view taken along the arrow IIIb-IIIb in (a), and (c) is a cross-sectional view taken along the arrow IIIb-IIIb according to the modification of (a). It is. It is a perspective view which shows the state which covered the discharge wire support site | part of the electric dust collector of the state of FIG. 2 with the insulating cover. It is a cross-sectional view of the electric dust collector in an assembled state. It is a figure which takes out and shows the principal part of FIG. It is a figure which shows the modification of FIG. (A), (b) is a perspective view which shows the example of the cross-sectional shape of the rib shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 10 Discharge line 10A Support area | region 10B Discharge area | region 24 Discharge line support part (discharge line support site)
25 Discharge wire feed terminal (discharge wire support part)
28a, 28b Rib 36 Spacer 50 Opposite ground electrode 60 High voltage electrode 61 Electrode plate 62 Connection bar 65 Power supply member 70 Low voltage electrode 91, 92 Insulation cover 93, 94 Insulation cover 95 Insulating filler 100 Charging part 200 Dust collection part 122 Hole part 122a Concavity 123 Shielding wall

Claims (7)

Charge that gives electric charge to fine particles in the air by a casing made of an insulating material, a discharge line that supports a support area outside the discharge area of the casing, and a counter earth electrode provided corresponding to the discharge line A dust collecting unit that generates an electric field by a high-voltage electrode and a low-voltage electrode supported by the housing, and the charged fine particles pass through the electric field so that the fine particles are adsorbed and collected by electrostatic force; In the electric dust collector equipped with
The discharge line supporting portion on the casing that supports the supporting area outside the discharge area of the discharge line is provided separately from the casing and covered with an insulating cover that prevents intrusion of wind from the outside. Electric dust collector. The electric dust collector according to claim 1,
On the wall surface between the discharge line support part on the casing and the part on the casing that is grounded, a recess for increasing the creeping distance between the two parts or a hole for breaking the creeping surface And an overhanging shielding wall for avoiding the flow of air into the recess or hole is provided on the front side of the air flow direction of the recess or hole. Electric dust collector. Charges are applied to fine particles in the air by a casing made of an insulating material, a discharge line on which the support area outside the discharge area is supported by the casing, and a counter earth electrode provided corresponding to the discharge line. A dust collecting unit that generates an electric field with a charging unit, a high-voltage electrode and a low-voltage electrode supported by the casing, and adsorbs and collects the particles by electrostatic force when the charged particles pass through the electric field. In an electric dust collector comprising:
Integrated resin molding comprising a plurality of electrode plates in which the high-voltage electrodes are arranged in parallel with each other at regular intervals, and a connecting bar that extends in the arrangement direction of the electrode plates and connects the ends of the electrode plates. Configured as a block,
A power supply member for supplying power to each electrode plate via the connection bar is attached to the connection bar from the outside, an insulation cover is attached to the power supply member from the outside, and the power supply member attached to the insulation cover An electric dust collector, wherein the high-voltage electrode is supported by the casing through a wall. The electric dust collector according to claim 3,
The connection bars are arranged in parallel with each other, and both ends of the electrode plates are coupled to the connection bars, so that the electrode plates and the connection bars are integrated. An electrostatic precipitator equipped with a power supply member and supplying power to the electrode plate through both power supply members. The electric dust collector according to claim 3 or 4,
At least one of the contact surfaces of the insulating cover and the housing is provided with a rib for reducing the contact area between the insulating cover and the housing, and the other contact surface is in contact with the tip of the rib. The electrostatic precipitator is characterized in that the high-voltage electrode is supported by the casing through the insulating cover. An electric dust collector according to any one of claims 3 to 5,
An electric dust collector, wherein an unnecessary space inside the housing is filled with a spacer that prevents air from flowing into a space around the power supply member. The electric dust collector according to any one of claims 3 to 6,
An electric dust collector, wherein an insulating filler is filled between the power supply member and the insulating cover.

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