JP2008296127A - Electrostatic precipitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic precipitator provided with an airtightness and an electrode plate supporting means which narrows a distance between electrode plates, prevents an arc discharge and short circuit, and can apply a high voltage. <P>SOLUTION: The electrostatic precipitator (100) having an ionizer part (P) and a collector part (Q) is provided with first and second end racks (10, 20) of both ends and one or more intermediate racks (30, 40) therebetween. End slit forming parts (16, 26) of each end rack have plural end slits for positive electrodes (13, 23) and a plurality of end slits for negative electrode (14, 24), the end slits for positive electrode allowing end pieces of a positive plate (1f, 1i) to pass to support, and a plurality of end slits for negative electrode allowing end pieces of a plurality of negative plates (2f, 2i) to pass to support. Intermediate slit forming parts (30, 40) of the intermediate racks have a plurality of intermediate slits (31, 41), and the plurality of intermediate slits allow a strip part of the positive plate and the negative plate to pass to support. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electrostatic precipitator that electrically captures dust floating in the air.

  The electric dust collector may be used as a single device or may be used as part of an air cleaner unitized with an ozone generator. As a general configuration in an electrostatic precipitator, dust in the air aspirated by a fan or the like is charged by high-voltage discharge, and the charged dust is attracted and attached to an electrode to which a high voltage is applied, and then the dust is removed. What exhausts air is known (patent documents 1 to 3). A section for charging dust may be referred to as an ionizer section, and a section for attaching dust to an electrode may be referred to as a collector section or a dust collection section.

In the collector part, in order to adhere dust efficiently, a configuration is known in which the electrode shape is a flat plate or strip having a large area and a large number of electrode plates are arranged. In such a plurality of electrode plates, positive plates to which a high voltage is supplied and negative plates to be grounded are alternately arranged with a predetermined interval. The electrode plate on which the dust has accumulated needs to be periodically cleaned to remove the dust and dried. One of the problems of this configuration is that the dust collecting effect is reduced because the electrode plate is bent due to repeated washing and drying, resulting in non-uniform or narrow electrode spacing. In Patent Document 1, deformation of the electrode plate is prevented by arranging strong spacers in a predetermined direction at a plurality of predetermined positions between the stacked positive electrode plate and negative electrode plate.
Public Open Heisei 7-13448 JP-A-6-142549 JP 2001-205135 A

  However, providing a plurality of spacers between the electrode plates as in Patent Document 1 increases the manufacturing cost. Therefore, a means for supporting the plurality of electrode plates in a flat state with an inexpensive and simple configuration is required. ing.

  In the collector section, the narrower the gap between the positive electrode plate and the negative electrode plate, the stronger the electric field strength and the greater the dust collection effect because a large number of electrode plates can be arranged, but arc discharge is likely to occur if the distance between the electrode plates is reduced. Become. When arc discharge occurs, the electrode plate is damaged, and at the same time, an unpleasant discharge sound is generated, and the trapped dust may be ignited.

Further, when the distance between the electrode plates becomes narrow, there is a possibility that a short circuit may occur due to the oscillation of the electrode plates that occurs when a high voltage is applied. When short-circuited, the applied voltage is lowered, the Coulomb force is lowered, and the dust collection performance is significantly lowered.
Due to such circumstances, in the conventional electrode plate supporting means, the distance between the electrode plates is about 4 mm as a minimum.

  Further, the electrostatic precipitator adopting the two-stage charging method having the ionizer part and the collector part as described above can theoretically capture 90% or more of 0.3 μm fine particles. However, in the case of electrostatic precipitators installed in air cleaners for smoke and general use, which are particularly widespread, the airtightness (excluding the intake and exhaust surfaces) of the housing that contains them is fully considered. There are many things that are not done. As a result, the dust in the intake air may be re-released as it is from the gap between the casings.

  In view of the above situation, the present invention achieves a narrower distance between the electrode plates than in the past and ensures a high voltage without fear of arc discharge or short circuit in an electrostatic precipitator having a collector portion in which a plurality of electrode plates are stacked. It is an object to realize an electrode plate supporting means that can be applied to the substrate. Another object of the present invention is to provide an electrostatic precipitator that ensures airtightness.

In order to achieve the above object, the present invention provides the following configurations.
The electrostatic precipitator of the present invention includes, as a basic configuration, an ionizer that charges dust by high-voltage discharge, and a plurality of strip-like positive plates that are installed horizontally with the direction perpendicular to the dust flow as the longitudinal direction. A plurality of negative electrode plates are alternately arranged in the vertical direction at a predetermined interval, and a collector portion to which the charged dust is attached by applying a high voltage is provided.
A first end rack and a second end rack are provided upright at both ends of the collector section. Each of the first and second end racks includes a flat end slit forming portion, and is erected so that the end slit forming portions face each other. The first and second end racks are made of an electrically insulating material.
Further, one or more intermediate racks are erected between the first and second end racks. Each intermediate rack includes a flat intermediate slit forming portion parallel to the end slit forming portion in each end rack. The intermediate rack is made of an electrically insulating material.
Still further, the end slit forming portion in the end rack includes a plurality of positive end slits and a plurality of negative end slits that are respectively drilled in the horizontal direction. The plurality of positive electrode end slits are arranged in the vertical direction so as to allow the end piece of each of the plurality of positive electrode plates to be inserted and to support the respective end piece of the positive electrode plate. On the other hand, the plurality of negative electrode end slits are arranged in the vertical direction so as to insert the end pieces of the plurality of negative electrode plates and support the end pieces of the negative electrode plates, respectively.
Still further, the intermediate slit forming portion in the intermediate rack includes a plurality of intermediate slits each drilled in the horizontal direction. The plurality of intermediate slits are arranged in the vertical direction so as to pass through the belt-like portions of each of the plurality of positive electrode plates and the plurality of negative electrode plates and support the belt-like portions, respectively.

  In one embodiment of the present invention, the end piece of the positive electrode plate and the end piece of the negative electrode plate are provided so as to protrude from part of the side edges at both ends in the longitudinal direction of the positive electrode plate and the negative electrode plate, respectively. And the end piece of a positive electrode plate and the end piece of a negative electrode plate protrude so that it may not mutually overlap by planar view.

  In one embodiment of the present invention, the housing of the electrostatic precipitator is a substantially rectangular parallelepiped.

  In one aspect of the present invention, the first end rack includes a first rack side plate that forms one side surface perpendicular to the intake surface and the exhaust surface of the housing of the electrostatic precipitator. Similarly, the second end rack comprises a second rack side plate forming the other side.

  In one embodiment of the present invention, a sealing material is provided at a joint portion between members that form a housing of an electric dust collector.

  In one aspect of the present invention, in at least one of the first and second end racks, a plurality of power feeding clips for sandwiching each end piece of the plurality of positive plates, and an end of each of the plurality of negative plates A plurality of ground clips for holding the pieces are provided. The plurality of power supply clips and the plurality of ground clips are each arranged in the vertical direction and fixed to the end rack.

  In one embodiment of the present invention, each of the plurality of power feeding clips is fixed by a conductive adhesive, and the resistance value of the conductive adhesive used for the power feeding clip varies depending on the position in the vertical direction.

  In one aspect of the present invention, each end piece of the plurality of positive plates and each end piece of the plurality of negative plates are formed in a bifurcated shape. In at least one of the first and second end racks, a feed rod extending in the vertical direction and having a cross-sectional shape that can be fitted into a bifurcated shape of an end piece of the positive plate, and an end of the negative plate A grounding rod extending in the vertical direction and having a cross-sectional shape that can be fitted in a bifurcated shape. Furthermore, the power supply rod and the grounding rod each have a cross-sectional shape that can be pushed into the bifurcated portion of the end piece of the positive electrode plate and the end piece of the negative electrode plate, and a pair of electrically insulating materials that extend in the vertical direction. A push-in fixing rod.

  In one embodiment of the present invention, a diffusion net made of an electrically insulating material is provided at the boundary between the ionizer portion and the collector portion.

  In one embodiment of the present invention, the positive electrode plate is formed from a metal flat plate and a conductive resin film covering the periphery of the metal flat plate.

  In the electric dust collector of the present invention, the first and second end racks are erected at both ends of the collector part, and one or more intermediate racks are erected at an intermediate position therebetween. The end rack is provided with an end slit for inserting and supporting the end pieces of the electrode plates (the positive electrode plate and the negative electrode plate), and the intermediate rack has an intermediate slit for inserting and supporting the upper portion of the electrode plate. Is provided. The plurality of end slits and the plurality of intermediate slits are all arranged in the vertical direction. With this configuration, each of the plurality of electrode plates is supported one by one by the first and second end racks, and the intermediate portion is supported by the intermediate rack. As a result, since the entire electrode plate is stably supported, it is possible to prevent the electrode plate from being bent and to prevent oscillation even when a high voltage is applied. In particular, since the intermediate slit provided in the intermediate rack supports the entire width of the belt-like portion of the electrode plate, these effects can be reliably obtained by installing one or a plurality of intermediate racks as required ( Claim 1).

  In this way, in the present invention, the flatness of the electrode plates can be maintained by the pair of end racks and one or a plurality of intermediate racks, so that the distance between the electrode plates can always be properly maintained. Therefore, the distance between the electrode plates can be reduced as compared with the conventional electrode plate supporting means. In the example, the distance between the electrode plates could be about 3 mm. As a result, the dust collection effect can be improved by increasing the electric field strength when the same high voltage is applied compared to the conventional case and increasing the number of electrode plates arranged in the same size space. (Claim 1).

  The pair of end racks and one or a plurality of intermediate racks are provided with slits that are approximately the same size as the end pieces and strips of each electrode plate. Can be assembled into. In addition, disassembling work at the time of cleaning and parts replacement is easy (claim 1).

  Furthermore, the end piece of the positive electrode plate and the end piece of the negative electrode plate protrude so as not to overlap each other in plan view. As a result, the end pieces of the plurality of positive electrode plates are arranged in a row in the vertical direction, while the end pieces of the plurality of negative electrode plates are arranged in another row in the vertical direction. As a result, the configuration of the connecting portion for power feeding and grounding is simplified without complication, and assembly and disassembly operations are facilitated.

  Furthermore, the housing of the electric dust collector of the present invention is a substantially rectangular parallelepiped. Therefore, there is no undulation on the outer surface except for the intake surface and the exhaust surface. Therefore, when this device is combined with another device to form a unit, it is possible to ensure airtightness with the chamber, which is a frame body that houses this device, and to reliably guide the intake air to the intake surface. (Claim 3).

  Furthermore, in the present invention, the first rack side plate provided in the first end rack forms one side surface of the housing of the electrostatic precipitator, and the second end plate provided in the second end rack. The rack side plate forms the other side surface of the casing of the electrostatic precipitator. Further, the first and second end racks and the intermediate rack can support the housing upper surface plate and the housing lower surface plate. Thereby, the number of parts of a housing | casing can be reduced (Claim 4).

  Furthermore, in this invention, a sealing material is provided in the junction part of the members which form the housing | casing of an electrostatic precipitator. Accordingly, accumulated dust can be prevented from leaking from the gap, and intake air containing dust can be prevented from being released from the gap.

  Furthermore, in the present invention, in at least one of the first and second end racks, a plurality of power supply clips that sandwich each end piece of the plurality of positive plates, and each end piece of the plurality of negative plates. And a plurality of grounding clips for sandwiching. As a result, the end piece of the electrode plate can be fed or grounded simply by sandwiching it between the feeding clip or the grounding clip, and can be removed by simply pulling out the electrode plate from these clips. Is easy (claim 6).

  Further, in the present invention, each of the plurality of power feeding clips is fixed by the conductive adhesive, and the resistance value of the conductive adhesive used for the power feeding clip varies depending on the position in the vertical direction. When the number of electrode plates increases, the electric field strength between the electrode plates may vary between the central portion of the stack and the upper and lower ends of the stack. For example, the electric field strength tends to be strong at the center near the external power feeding portion, and the electric field strength tends to be weak at both end portions. In this case, the electric field strength can be adjusted to be uniform by increasing the resistance value of the conductive adhesive to which the power feeding clip is attached at the center and decreasing the resistance at both ends. .

  Furthermore, in another configuration in which power is supplied to the electrode plate and the electrode plate is grounded, each end piece of the plurality of positive plates and each end piece of the plurality of negative plates are formed in a bifurcated shape. In at least one of the first and second end racks, a feed rod extending in the vertical direction and having a cross-sectional shape that can be fitted into a bifurcated shape of an end piece of the positive plate, and an end of the negative plate A grounding rod extending in the vertical direction and having a cross-sectional shape that can be fitted in a bifurcated shape. Furthermore, the power supply rod and the grounding rod each have a cross-sectional shape that can be pushed into the bifurcated portion of the end piece of the positive electrode plate and the end piece of the negative electrode plate, and a pair of electrically insulating materials that extend in the vertical direction. A push-in fixing rod. By using such power supply rods, ground rods and push rods that are long in the vertical direction, connection and removal for power supply and grounding for a large number of electrode plates are performed once for all electrode plates, not for each electrode plate. It can carry out easily by operation of (Claim 8).

  Furthermore, in the present invention, a diffusion net made of an electrically insulating material is provided at the boundary between the ionizer portion and the collector portion. As a result, the air flowing from the ionizer section to the collector section collides with the diffusion net to generate turbulent flow, and the flow velocity decreases in the vicinity thereof. As a result, the contact time between the ozone generated in the ionizer and air is increased, and the amount of charge in the ionizer is increased. Moreover, the turbulent flow generated by the collision with the diffusion net is further disturbed by colliding with the front edge of the electrode plate of the collector part, and this also increases the contact time with ozone. By increasing the contact time between air and ozone, the effect of killing viruses contained in the air is improved (claim 9).

  Furthermore, in this invention, the positive electrode plate is formed from the metal flat plate and the conductive resin film which coat | covered the circumference | surroundings of the metal flat plate. When the distance between the electrode plates is reduced, arc discharge is likely to occur. However, by covering the surface of the positive electrode plate with a conductive resin film, it is possible to prevent discharge that occurs between the negative electrode plate and the electrode plate. This is because the conductive resin film has a higher surface resistivity than a metal flat plate. This is also effective as a countermeasure against the extension of the charging decay time caused by the increase in the number of electrode plates. Moreover, it is effective in preventing an electric shock (claim 10).

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
FIG. 1 is a cross-sectional view seen from the side schematically showing the basic configuration of an electrostatic precipitator to which the present invention is applied. In the figure, white arrows indicate the direction of air flow, that is, dust flow (the same applies to the following drawings). In FIG. 1, the air is sucked from the left side of the paper and is exhausted to the right side through the device. Such an air flow is formed by an appropriate fan or the like (not shown).

  The electrostatic precipitator 100 is accommodated in an appropriate casing (not shown in FIG. 1) that surrounds the entire outer periphery, and an intake port is formed in the casing front plate 50. . Air flows into the device from the air intake. In the apparatus, a section for the ionizer portion P is provided on the upstream side, and a section for the collector portion Q is provided on the downstream side. In the ionizer portion P, ionizer wires 4a made of a plurality of conductor wires are installed in the horizontal direction, and an ionizer ground plate 4e made of a conductor plate is provided between the ionizer wires 4a. Each ionizer ground plate 4e extends in the depth direction of the drawing. In the illustrated embodiment, each ionizer ground plate 4 e is provided so as to protrude from the back surface of the housing front plate 50. The front housing plate 50 is also a conductor and has a ground potential. A high voltage V1 (for example, 8 kV) is externally applied to each ionizer line 4a. Application of the high voltage V1 causes corona discharge in the ionizer P, thereby charging dust in the intake air. Ozone is also generated (for example, the atmospheric concentration is about 1.2 to 1.0 ppm). Some floating microorganisms and viruses are dissolved or inactivated by contact with ozone.

  A diffusion net 5a made of an electrically insulating material is provided over the entire interface between the ionizer P and the collector Q. As a result of the turbulent flow caused by the collision of air with the diffusion net 5a, the time during which dust stays in the ionizer part P becomes longer and is sufficiently charged. Moreover, the bactericidal action by the ozone which generate | occur | produces in the ionizer part P will fully be performed. At a general flow rate (about 1.0 m / s) when the diffusion net 5a is not provided, there is a possibility of flowing into the collector part Q with insufficient contact of ozone with microorganisms or viruses to be processed. The mesh size of the diffusion net 5a is set so as not to cause significant pressure loss.

  In the collector part Q, a plurality of strip-shaped electrode plates are arranged. The plurality of electrode plates includes a plurality of positive electrode plates 1 and a plurality of negative electrode plates 2. Each of the strip-shaped electrode plates 1 and 2 is arranged with the direction perpendicular to the dust flow (the depth direction in the drawing) as the longitudinal direction and the flat surface horizontal. The positive electrode plate 1 and the negative electrode plate 2 are alternately arranged in the vertical direction at a predetermined interval. A high voltage V2 (for example, 4 kV) is applied to each positive electrode plate 1 from the outside. Each negative electrode plate 2 is set to ground potential. When dust charged by the ionizer P flows into the collector Q, it is attracted to the electrode plate by the Coulomb force and adsorbed on the surface. The particles charged to a positive potential are adsorbed on the negative electrode plate that is at the ground potential. Except for the positively charged particles, they are adsorbed on the positive electrode plate. Thereby, dust is removed from the air. Moreover, since the electric field in the collector part Q is very strong, there is also an effect of decomposing, killing, or inactivating microorganisms, viruses, and the like that have passed through the ionizer part P as they are.

  The air that has passed through the collector part Q is exhausted from the housing back plate 60. An exhaust port is formed in the housing back plate 60. The case back plate 60 is also a conductor and has a ground potential. The surplus ozone generated in the ionizer part is exhausted through the collector part Q, but is reduced by providing an ozone decomposition filter further downstream of the exhaust port. In addition, when dirt adheres to the inside of the apparatus 100 or abnormal discharge or the like occurs due to the accumulation of foreign matter, the apparatus 100 is disassembled and each component is cleaned with an alkaline cleaning liquid. There is almost no deterioration of the parts that affect the performance of the device by washing.

  FIG. 2 is a six-sided view showing the appearance of the electrostatic precipitator 100 according to the present invention. (a) is a front view and shows an intake surface. An intake port 51 is formed in the housing front plate 50. (b) is a rear view showing an exhaust surface. An exhaust port 61 is formed in the housing back plate 60. (c) is a left side view, and a flat surface which is a part of an end rack 10 described later is a left side surface of the apparatus 100 as it is. On the left side surface, an ionizer external power supply unit 11 that is a terminal for supplying power to the ionizer unit in the apparatus and a collector external power supply unit 12 that is a terminal for supplying power to the collector unit are provided. These external power feeding units may be provided on the right side surface. (d) is a right side view, and a flat surface which is a part of an end rack 20 described later is the right side surface of the apparatus 100 as it is. (e) is a plan view, and the housing upper surface plate 70 forms the upper surface of the apparatus 100. In the illustrated example, a recess 71 is formed in the central portion of the housing upper surface plate 70, and a handle 72 is provided so as to fit within the recess 71. As shown in the side views of (c) and (d), there is a case lower surface plate 73 having the same outline shape as the case upper surface plate 70 on the bottom surface side.

  Referring to the left and right side views of FIGS. 2C and 2D and the plan view of FIG. 2E, a front frame 52 that is a frame portion of the casing front plate 50 and a rear frame that is a frame portion of the casing rear plate. A part of 62 is visible. As shown in (c) and (d), the housing upper surface plate 70 and the housing lower surface plate 73 which are conductors are fitted between the front frame 52 and the rear frame 62 which are conductors.

  As shown in FIG. 2, the outer shape of the electrostatic precipitator 100 is a substantially rectangular parallelepiped, and there is no portion protruding outward from the outer peripheral surface of the rectangular parallelepiped. Thereby, when the apparatus 100 is assembled or installed in the chamber, an inadvertent gap is not generated around. This has the effect of sucking air from the intake port, allowing it to pass through the apparatus without leaking, and exhausting it from the exhaust port. Furthermore, it is preferable that an appropriate sealing material (not shown) is provided at a joint portion of each component constituting the housing of the apparatus 100 to ensure airtightness. Examples of the sealing material include a type that covers the edge of each component and a type that is filled and solidified.

  In the present invention, by removing unnecessary irregularities in the outer shape of the device 100 to form a substantially rectangular parallelepiped, a handle is placed in the recess of the housing upper surface plate 70 so as not to cause inconvenience in handling during installation and removal of the device. Provided. As another embodiment, a handle may be provided by forming a recess on the right side surface having no external power feeding unit. When the external power feeding unit is provided on the right side, the handle is provided on the left side.

  FIG. 3 is an exploded perspective view of the electrostatic precipitator 100 according to the present invention. Note that illustration of some components is omitted. A first end rack 10 and a second end rack 20 are provided upright at both ends of the apparatus 100. The first end rack 10 and the second end rack 20 have a substantially symmetrical shape. A flat end slit forming portion 26 is provided inside the second end rack 20, and a plurality of positive end slits 23 and a plurality of negative end slits 24 are arranged in two rows in the vertical direction. It is arranged. Each of the slits 23 and 24 is formed so as to penetrate the end slit forming portion 26 in the horizontal direction. Although not visible in FIG. 3, the first end rack 10 also has the same end slit forming portion as the second end rack 20. The end slit forming part 26 is provided in the section of the collector part Q shown in FIG.

  Two intermediate racks 30 and 40 are erected between the first end rack 10 and the second end rack 20. These are installed in the section of the collector part Q in FIG. The intermediate racks 30 and 40 include flat intermediate slit forming portions 36 and 46 at the center of the frame. The intermediate slit forming portions 36 and 46 are installed in parallel with the end slit forming portions 26 of the first and second end slits 10 and 20. In the intermediate slit forming portions 36 and 46, a plurality of intermediate slits 31 and 41 are arranged in the vertical direction, respectively. Although not specifically illustrated in FIG. 3, the intermediate slits 31 and 41 are formed so as to penetrate the intermediate slit forming portions 36 and 46 in the horizontal direction.

  As shown in FIG. 3, the upper surface of the housing projects from the lower surface of the rear frame 62 of the rear housing plate 60 and the upper surface plate support portion 53 a that projects from the lower surface of the front frame 52 of the front housing plate 50. Both edges along the longitudinal direction of the upper surface plate 70 are supported by the upper surface plate support portion 63a (the handle in the recess 71 of the upper surface plate 70 is not shown). Further, both ends of the upper surface plate 70 in the longitudinal direction are supported by the upper surfaces of the first end rack 10 and the second end rack 20.

  In addition, on the bottom surface of the housing, a lower surface plate support portion 53 b that projects from the upper surface of the front frame 52 of the front housing plate 50 and a lower surface plate support portion 63 b that projects from the upper surface of the back frame 62 of the rear housing plate 60. Thus, both edges along the longitudinal direction of the lower surface plate 73 are supported. Further, both ends in the longitudinal direction of the lower surface plate 73 are supported by the lower surfaces of the first end rack 10 and the second end rack 20.

  Further, the upper and lower surfaces of the intermediate racks 30 and 40 are also in contact with and supported by the upper surface plate 70 and the lower surface plate 73, respectively. As will be described later, the main role of the first and second end racks 10 and 20 and the intermediate racks 30 and 40 is to support a plurality of electrode plates of the collector part. It also serves to support the housing. Thereby, the number of parts can be reduced.

  When assembling the apparatus, the components shown in FIG. 3 are assembled with each other, and fixed to a screw hole provided at a proper position by applying a fixing tool such as a bolt or a nut.

  4 is a perspective view showing in detail the first end rack 10 and the second end rack 20 and the two intermediate racks 30 and 40 shown in FIG. These rack parts are all formed from an electrically insulating material. However, FIG. 3 is a perspective view as seen from the intake surface side, but FIG. 4 is a perspective view as seen from the exhaust surface side (see white arrows showing the flow of air).

  The first end rack 10 and the second end rack 20 are erected so as to face each other and have a substantially bilaterally symmetric shape. The difference is that the first end rack 10 is provided with the ionizer external power supply and the collector external power supply (shown in FIG. 4) shown in FIG. It is a point that cannot be provided.

  The first end rack 10 mainly includes a rack side plate 15a forming one side surface of the housing, a rack upper plate 15b extending inward from the upper end of the rack side plate 15a, and a rack lower plate 15c extending inward from the lower end. It is a rack as a framework. Further, a flat end slit forming portion 16 is provided between the rack upper plate 15b and the rack lower plate 15c. The end slit forming portion 16 is erected in parallel with the rack side plate 15 a with a space therebetween, and is connected to the rack side plate 15 a by the electrode separation plate 17. The electrode separation plate 17 divides the inside of the rack into a space s1 and a space s2.

  A plurality of positive end slits 13 and a plurality of negative end slits 14 are formed in the end slit forming portion 16 of the first end rack 10 and arranged in two rows in the vertical direction. Each end slit 13, 14 penetrates the end slit forming portion 16 in the horizontal direction. The opening shape and the longitudinal cross-sectional shape of each end slit 13 and 14 approximate the cross-sectional shape of the end piece of each electrode plate mentioned later. Each of the positive electrode end slits 13 and each of the negative electrode end slits 14 are not located at the same height, but are shifted in a staggered manner.

  The second end rack 20 mainly includes a rack side plate 25a that forms the other side surface of the housing, a rack upper plate 25b that extends inward from the upper end of the rack side plate 25a, and a rack lower plate 25c that extends inward from the lower end. It is a rack as a framework. Further, a flat end slit forming portion 26 is provided between the rack upper plate 25b and the rack lower plate 25c. The end slit forming portion 26 is erected in parallel with the rack side plate 25 a with a space therebetween, and is connected to the rack side plate 25 a by the electrode separation plate 27. The electrode separation plate 27 divides the inside of the rack into a space s3 and a space s4.

  In the end slit forming portion 26 of the second end rack 20, a plurality of positive end slits 23 and a plurality of negative end slits 24 are formed and arranged in two rows in the vertical direction. Each of the end slits 23 and 24 penetrates the end slit forming portion 26 in the horizontal direction. The opening shape and the longitudinal cross-sectional shape of each end slit 23 and 24 approximate the cross-sectional shape of the end piece of each electrode plate mentioned later. Each of the positive electrode end slits 23 and each of the negative electrode end slits 24 are not located at the same height, but are shifted in a staggered manner.

  The intermediate racks 30 and 40 have the same structure. The intermediate racks are erected as many as necessary to support the electrode plates according to the length in the longitudinal direction of the electrode plates described later. Therefore, the number of intermediate racks may be one or three or more.

The intermediate rack 30 is formed by upper, lower, left and right rack peripheral frames 35 and a flat intermediate slit forming portion 36 inside thereof. A plurality of intermediate slits 31 are formed in the intermediate slit forming portion 36 and arranged in a line in the vertical direction. Each intermediate slit 31 penetrates the intermediate slit forming part 36 in the horizontal direction. The opening shape and vertical cross-sectional shape of each intermediate slit 31 are approximate to the cross-sectional shape of the band-shaped portion of each electrode plate described later.
The intermediate rack 40 is the same as the intermediate rack 30.

  FIG. 5 shows the electrode plate in detail. FIG. 2A is a plan view of the positive electrode plate 1. FIG. 2B is a plan view of the negative electrode plate 2. (C) is a vertical sectional view of a part of a plurality of electrode plates along the longitudinal direction.

  As shown in FIG. 5A, the positive electrode plate 1 has a strip shape, and the width between the front edge 1a and the rear edge 1b in the strip portion is constant. A terminal base 1e protrudes from a part of one side edge 1c in the longitudinal direction, and an end piece 1f protrudes from a part thereof. A terminal base 1h protrudes from a part of the other side edge 1d in the longitudinal direction, and an end piece 1i protrudes from a part thereof. The end piece 1f is inserted through the positive end slit 13 shown in FIG. 4, and the end piece 1i is inserted through the positive end slit 23 shown in FIG. Since it is necessary to supply power to the end piece 1f, the length of the end piece penetrates the positive end slit 13 and further protrudes. On the other hand, since no power is supplied to the end piece 1i (it is sufficient to supply power only to one end of the positive electrode plate), the tip does not need to penetrate the positive end slit 23. Therefore, as shown in FIG. 5A, the end piece 1f is longer than the end piece 1i. However, the end piece 1i may have the same length as the end piece 1f, and the positive electrode plate 1 may have a bilaterally symmetric shape.

  As shown in FIG. 5B, the negative electrode plate 2 has a strip shape, and the width between the front edge 2a and the rear edge 2b in the strip portion is constant. A terminal base 2e protrudes from a part of one side edge 2c in the longitudinal direction, and an end piece 2f protrudes from a part thereof. A terminal base 2h protrudes from a part of the other side edge 2d in the longitudinal direction, and an end piece 2i protrudes from a part thereof. The end piece 2f is inserted through the negative electrode end slit 14 shown in FIG. 4, and the end piece 2i is inserted through the negative electrode end slit 24 shown in FIG. Since the end piece 2f needs to be grounded, the length of the end piece penetrates the negative end slit 14 and further protrudes. On the other hand, since the end piece 2i is not grounded (it is sufficient that only one end of the negative electrode plate is grounded), the tip thereof does not need to penetrate the positive end slit 24. Therefore, as shown in FIG. 5B, the end piece 2f is longer than the end piece 2i. However, the end piece 2i may have the same length as the end piece 2f, and the negative electrode plate 2 may have a bilaterally symmetric shape.

  5A and 5B, when the positive electrode plate 1 and the negative electrode plate 2 are overlapped, the end pieces 1f and 1i of the positive electrode plate 1 and the end pieces 2f and 2i of the negative electrode plate 2 are It can be seen that they are provided at positions that do not overlap each other in plan view.

  As shown in FIG.5 (c), in the suitable example, the positive electrode plate 1 is formed from the metal flat plate 1g and the electroconductive resin film 1j which coat | covered the circumference | surroundings of the metal flat plate 1g. Thereby, there is an effect of preventing arc discharge when the interval t between the positive electrode plate 1 and the negative electrode plate 2 becomes small. The negative electrode plate 2 is formed from a single metal flat plate. Accordingly, the positive electrode plate 1 is slightly thicker than the negative electrode plate 2 (in FIG. 5, the thickness of the conductive resin film 1j is exaggerated). As an example, the metal flat plate 1g and the negative electrode plate 2 of the positive electrode plate 1 are aluminum plates having a thickness of 0.5 mm, and the conductive resin film is 0.03 mm thick polyethylene with a conductive filler. Therefore, in practice, the thicknesses of the positive electrode plate 1 and the negative electrode plate 2 are almost the same.

  With reference to FIGS. 6-8, the structure which supports the some positive electrode plate 1 and the some negative electrode plate 2 in a collector part, and the structure of the electric power feeding part of the positive electrode plate 1, and the earthing | grounding part of the negative electrode plate 2 are demonstrated.

  6 is a developed plan view of the inside of the electrostatic precipitator 100 as viewed from above with the top plate 70 shown in FIG. 3 and the rack upper plates 15b and 25b shown in FIG. 4 removed. The housing front plate 50 and the housing back plate 60 are shown separated from the main body. 7 is a diagram schematically and schematically showing the A section in FIG. 6 and FIG. 8 is a diagram schematically showing the B section in FIG. 6 (the thickness of the electrode plate is shown exaggerated from the actual one). )

  An ionizer wire 4a is installed at a position closest to the intake port, and fixed portions 4b and 4c are provided at both ends thereof. One ionizer wire fixing portion 4b is connected to an ionizer external power feeding portion (not shown).

  A diffusion net 5a is stretched between the ionizer wire 4a and the electrode plate, and both end portions 5b and 5c are fixed by appropriate fixing means. The diffusion net 5a extends over the entire boundary surface between the ionizer portion and the collector portion with a planar extension.

  In FIG. 6, the uppermost electrode plate is the positive electrode plate 1. The belt-like portion of the positive electrode plate 1 passes through the uppermost intermediate slit provided in the intermediate racks 30 and 40. As shown in FIGS. 7 and 8, the intermediate racks 30 and 40 are provided with a number of intermediate slits, each including the positive electrode plate 1 and the negative electrode plate 2, at predetermined intervals. The distance between the slits defines the distance between the positive electrode plate 1 and the negative electrode plate 2. The cross-sectional shape of the slit may be substantially the same as the cross-sectional shape of the belt-like portions of the positive electrode plate 1 and the negative electrode plate 2, but it is preferable that a certain amount of margin is actually provided in order to facilitate the insertion operation. For example, when the thickness of the electrode plate is 0.5 to 0.6 mm, the longitudinal dimension of the intermediate slit is about 1.0 mm, and the gap between the slits is about 3 mm. Set to. 7 and 8, the thickness of the positive electrode plate 1 is exaggerated in order to distinguish the positive electrode plate 1 and the negative electrode plate 2, but since the actual thickness is almost the same, the vertical dimension of the intermediate slit is shown. Can all be the same.

  6 and 7, the end piece 1f on the power feeding side of the positive electrode plate 1 passes through the positive electrode end slit 13 of the first end rack 10 and its tip is exposed. The tip of the end piece 1f is sandwiched between power feeding clips 6a made of a conductive material. On the other hand, the end piece 1i on the opposite side of the positive electrode plate 1 is inserted into the positive end slit 23 of the second end rack 20, but the tip is not exposed.

  Referring to FIGS. 6 and 8, the end piece 2 f on the ground side of the negative electrode plate 2 penetrates the negative end slit 14 of the first end rack 10 to expose its tip, and the ground clip 6b. On the other hand, the end piece 2i on the opposite side of the negative electrode plate 2 is inserted into the negative end slit 24 of the second end rack 20, but the tip is not exposed.

  FIG. 9A is a cross-sectional view taken along the line C in FIG. 7, and is a cross-sectional view taken at the height of the ionizer external power supply unit 11 shown in FIG. The fixing portion 4b of the ionizer wire 4a is attached to the tip of an appropriate high voltage insulating member 7 fixed to the inner surface of the rack side plate 15a. The fixed part 4b and the ionizer external power supply part 11 are connected by an ionizer power supply conducting wire 4d. A plurality of ionizer wires 4a are arranged at a predetermined interval in the vertical direction. One end of each ionizer wire 4a is fed so that a high voltage (V1 in FIG. 1) is fed to any ionizer wire 4a. Commonly connected.

  Further, as shown in FIG. 9A, the negative electrode plate 2 positioned substantially near the center of the plurality of negative electrode plates 2 arranged in a line in the vertical direction and the housing back plate 60 are directly connected. . Specifically, the collector grounding conductor 2k is connected between the grounding clip 6b that sandwiches the tip of the end piece 2f of the negative electrode plate 2 shown in FIG. A plurality of the negative electrode plates 2 are arranged at predetermined intervals in the vertical direction, but since each grounding clip 6b sandwiching each end piece 2f is fixed so as to be electrically connected, any negative electrode plate is provided. 2 is also grounded.

  FIG. 9B is a cross-sectional view taken along the line D in FIG. 7, and is a cross-sectional view taken at the height of the collector external power feeding unit 12 shown in FIG. The positive electrode plate 1 positioned approximately in the vicinity of the center of the plurality of positive electrode plates 1 arranged in a line in the vertical direction and the collector external power supply unit 12 are directly connected. Specifically, the collector power supply lead 1k is connected between the power supply clip 6a sandwiching the tip of the end piece 1f of the positive electrode plate 1 shown in FIG. . A plurality of positive electrode plates 1 are arranged at a predetermined interval in the vertical direction. However, since all the feeding clips 6a sandwiching each end piece 1f are fixed to each other, any positive electrode plate is provided. 1 is also supplied with a high voltage (V2 in FIG. 1). In addition, you may insert the resistance for electric current suppression in the middle of the collector electric power feeding conductor 1k as needed. This also has the effect of preventing discharge between the electrodes.

FIG. 9C is a perspective view showing a method of attaching the grounding clip 6 b that holds the end piece 2 f of the negative electrode plate 2 to the rack side plate 15 a of the first end rack 10. The grounding clip 6b includes a flat back surface portion 6b1 and a pair of arm portions 6b2 and 6b3 that respectively extend from the upper and lower ends and elastically contact at the tip. The back surface portion 6 b 1 and the rack side plate 15 a are bonded and fixed by the conductive adhesive 8. FIG. 9C shows only one grounding clip 6 b, but the adjacent grounding clips 6 b are brought into contact with each other and conductive with the conductive adhesive 8. The tip of the end piece 2f of the negative electrode plate 2 is inserted between the pair of arm portions 6b2 and 6b3 and is elastically sandwiched.
Although not shown, the same applies to the positive electrode plate 1 and the power supply clip 6a.

  FIG. 10 shows another embodiment of the present invention, and is an exploded perspective view showing only the vicinity of the first end rack 10A on the power feeding side of the pair of end racks. FIG. 11 is an enlarged cross-sectional view of E in a state where the components shown in FIG. 10 are assembled. In this embodiment, the shape of the power supply side end piece 1fA of the positive electrode plate 1A, the shape of the ground side end piece 2fA of the negative electrode plate 2A, and the configurations of the power supply unit and the grounding unit for these end pieces are as described above. Different from the example. The configuration of the other end rack and the other end piece of each electrode plate may be the same as in the above-described embodiment.

  The end slit forming plate 16, the rack upper plate 15b, and the rack lower plate 15 of the first end rack 10A are the same as those in the above-described embodiment. In this embodiment, the ends of the end piece 1fA of the positive electrode plate 1A and the end piece 2fA of the negative electrode plate 2A are bifurcated. The bifurcated shape is a shape having a valley portion between a pair of protruding pieces.

  The first end rack 10A of the present embodiment includes a rack side plate 18 instead of the rack side plate 15a of the above-described embodiment. The rack side plate 18 is an electrically insulating material, and has two cutout holes 18a and 18b extending in the vertical direction from the vicinity of the upper end to the vicinity of the lower end. These cutout holes 18a, 18b have a T-shaped horizontal cross-sectional shape. Furthermore, a power supply rod 81a and a grounding rod 81b extending in the vertical direction and a pair of push-fixing rods 82a and 82b are provided. The power supply rod 81a and the grounding rod 81b have the same shape and are made of a conductor. The pair of push-in fixing rods 82a and 82b have the same shape and are made of an electrically insulating material.

  As shown in FIG. 11, the power supply rod 81a has a cross-sectional shape that can be fitted into a forked shape (particularly a valley portion) of the end piece 1fA of the positive electrode plate 1A, and the ground rod 81b is an end portion of the negative electrode plate 2A. It has a cross-sectional shape that can be fitted into a bifurcated shape (particularly a valley portion) of the piece 2fA. Furthermore, the cross-sectional shapes of the power supply rod 81a and the grounding rod 81b are shapes that can be fitted to the T-shaped cross-sectional shapes of the cutout holes 18a and 18b of the rack side plate 18. Further, the push-in fixing rods 82a and 82b each have a T-shaped cross-sectional shape that can push the feeding rod 81a and the grounding rod 81b into the valley portions of the end piece 1fA and the end piece 2fA, respectively. Therefore, when the push-in fixing rods 82a and 82b are completely pushed into the cutout holes 18a and 18b, the outer surface of the rack side plate 18 becomes a flat surface.

  Although not shown, a high voltage can be supplied to the end piece 1fA by connecting the power supply rod 81a to a collector external power supply section (not shown) by appropriate connecting means. Further, the end piece 2fA can be grounded by grounding the ground rod 81b by appropriate means (conducting with the casing).

  In each of the embodiments described above, the ionizer external power supply unit and the collector external power supply unit may be provided in either the first end rack or the second end rack. Moreover, the connection structure between the collector external power supply unit and the positive electrode plate is not limited to the above-described embodiment, and various modes are possible.

  FIG. 12 is a diagram showing an example of an installation method of the electric dust collector 100 of the present invention. FIG. 12A is a perspective view showing a state where the chamber guide frame 91 is attached to the intake surface side of the electrostatic precipitator 100 and the clamp hardware 92 is attached to the exhaust surface side. FIG.12 (b) is a schematic side view which shows the condition which assembled the electrostatic precipitator 100 and the ozonolysis filter 200 in the chamber. The upper and lower surfaces of the chamber guide frame 91 are fixed to the chamber bodies 93 and 94. The clamp hardware 92 is fixed to the back frame 95. The electrostatic precipitator 100 is pressed against the chamber guide frame 91 by the clamp hardware 92. The ozonolysis filter 200 is installed at a predetermined interval on the exhaust side of the electrostatic precipitator 100 and is fixed in the same manner as the electrostatic precipitator 100.

  In the present invention, since the electrostatic precipitator 100 has a substantially rectangular parallelepiped outer shape, it can be brought into close contact with the chamber that houses the apparatus, and airtightness can be ensured. Thereby, the air to be processed can be reliably introduced into the intake surface.

It is sectional drawing seen from the side surface which shows typically the basic composition of the electrostatic precipitator to which this invention is applied. It is an external appearance 6-plane view of the electrostatic precipitator 100 by this invention. (a) is a front view, (b) is a rear view, (c) is a left side view, (d) is a right side view, and (e) is a plan view. It is an expansion | deployment perspective view of the electrostatic precipitator by this invention. FIG. 4 is a perspective view showing in detail the first end rack and the second end rack shown in FIG. 3 and two intermediate racks. It is a figure which shows an electrode plate in detail. (A) is a top view of a positive electrode plate. (B) is a top view of a negative electrode plate. (C) is sectional drawing of the perpendicular direction along the longitudinal direction of some electrode plates. It is the expansion | deployment top view which looked at the inside except the upper surface board of the electric dust collector shown in FIG. It is the figure which showed the A cross section in FIG. 6 roughly and typically. It is the figure which showed the B cross section in FIG. 6 roughly and typically. (a) is C sectional drawing of FIG. 7, (b) is D sectional drawing of FIG. FIG. 6 is another exploded perspective view showing only the vicinity of the first end rack according to another embodiment of the present invention. It is E sectional expanded view of the state which assembled the component shown in FIG. (a) And (b) is a figure which shows an example of the installation method of the electrostatic precipitator of this invention.

Explanation of symbols

1, 1A: positive electrode plate 1a: front edge, 1b: rear edge, 1c: first side edge, 1d: first side edge, 1e, 1h: terminal base, 1g: metal flat plate, 1f, 1i: end piece, 1j: Conductive resin film, 1k: Collector power supply wire 2, 2A: Negative electrode plate 2a: Front edge, 2b: Rear edge, 2c: First side edge, 2d: First side edge, 2e, 2h: End piece base 2f, 2i: End piece 3: Conductive film 4a: Ionizer wire, 4b, 4c: Ionizer wire fixing part, 4d: Ionizer feeding lead wire, 4e: Ionizer grounding plate 5a: Diffusion net, 5b, 5c: Diffusion net fixing Part 6a: Feeding clip, 6b: Grounding clip 10, 10A: First end rack 11: Ionizer external feeding part 12: Collector external feeding part 13: Positive end slit 14: Negative end slit 15a: Rack side plate, 15b: Rack top plate 15c: Rack lower plate 16: End slit forming portion 17: Electrode separating plate 18: Rack side plate, 18a, 18b: Feeding conductor insertion vertical hole 20: Second end rack 23: Positive electrode end slit 24: Negative electrode End slit 25a: Rack side plate, 25b: Rack upper plate, 25c: Rack lower plate 26: End slit forming portion, 27: Electrode separation plate 30: First intermediate rack 31: Intermediate slit 35: Rack peripheral frame 36: Intermediate Slit forming portion 40: second intermediate rack 41: electrode plate slit 45: rack peripheral frame 46: intermediate slit forming portion 50: housing front plate 51: air inlet 52: front frame 53a: top plate supporting portion 60: back of housing Face plate 61: Exhaust port 62: Back frame 63a: Upper surface plate support portion, 63b: Lower surface plate support portion 70: Housing upper surface plate, 71: Housing upper surface recess, 72: Handle portion 73: Housing lower surface 81a: feed rod, 81b: ground rods 82a, 82b: pushing the fixation rod 91: chamber guide frame 92: Clamp hardware 93, 94: body chamber 95: the rear frame 100: electrostatic precipitator 200: Ozonolysis filter
P: Ionizer part Q: Collector part s1, s3: Rack first space, s2, s4: Rack second space V1: Ionizer voltage V2: Collector voltage

Claims (10)

An ionizer (P) for charging dust by high-voltage discharge, a plurality of strip-like positive plates (1) and a plurality of negative plates (2 In the electrostatic precipitator (100) provided with a collector part (Q) for adhering the charged dust by alternately arranging in a vertical direction at a predetermined interval and applying a high voltage,
A first end rack (10) and a second end portion made of an electrically insulating material, each having a flat plate-like end slit forming portion (16, 26) which is provided upright at both ends of the collector portion and faces each other. Rack (20),
One or a plurality of intermediates made of an electrically insulating material, which is provided between the first and second end racks and has a flat intermediate slit forming part (36, 46) parallel to the end slit forming part Racks (30, 40), and
The end slit forming portion (16, 26) includes a plurality of positive end slits (13, 23) and a plurality of negative end slits (14, 24) respectively drilled in the horizontal direction. The positive electrode end slits are arranged in the vertical direction so as to pass through the end pieces (1f, 1i) of the positive electrode plates and support the end pieces of the positive electrode plates, respectively. The end slits for use are arranged in the vertical direction so as to insert the end pieces (2f, 2i) of each of the negative electrode plates and support the end pieces of the negative electrode plates, and
The intermediate slit forming portion (30, 40) includes a plurality of intermediate slits (31, 41) each drilled in a horizontal direction, and the plurality of intermediate slits are the plurality of positive plates and the plurality of negative plates. An electrostatic precipitator that is arranged in a vertical direction so as to pass through each of the belt-like portions and support the belt-like portions.   The end pieces (1f, 1i) of the positive plate and the end pieces (2f, 2i) of the negative plate are respectively side edges (1c, 1d, 2c, 2d) of the positive plate and the negative plate in the longitudinal direction. And the end piece of the positive electrode plate and the end piece of the negative electrode plate protrude so as not to overlap each other in plan view. The electric dust collector as described.   The electrostatic precipitator according to claim 1 or 2, wherein the casing of the electrostatic precipitator is a substantially rectangular parallelepiped.   The first end rack (10) includes a first rack side plate (15a) that forms one side surface perpendicular to the intake surface and the exhaust surface of the housing of the electrostatic precipitator; and The electric dust collector according to claim 3, wherein the second end rack (20) includes a second rack side plate (25a) forming the other side surface.   The electrostatic precipitator according to claim 3 or 4, wherein a sealing material is provided at a joint portion between members forming a casing of the electrostatic precipitator.   At least one of the first and second end racks (10, 20), a plurality of power supply clips (6a) sandwiching each end piece (1f) of the plurality of positive electrode plates, and the plurality of negative electrodes 6. A plurality of grounding clips (6b) sandwiching each end piece (2f) of the plate are provided, and are arranged and fixed in the vertical direction, respectively. Electric dust collector.   Each of the plurality of power feeding clips (6a) is fixed by a conductive adhesive, and the resistance value of the conductive adhesive used for the power feeding clip varies depending on the position in the vertical direction. The electric dust collector as described. Each end piece (1fA) of each of the plurality of positive plates and each end piece (2fA) of the plurality of negative plates are formed in a bifurcated shape,
In at least one of the first and second end racks (10A, 20A), a feed rod (81a) having a cross-sectional shape that can be fitted into a bifurcated shape of the end piece of the positive electrode plate and extending in the vertical direction. ), A grounding rod (81b) having a cross-sectional shape that can be fitted in a bifurcated shape of the end piece of the negative electrode plate, and extending in the vertical direction, and the feeding rod and the grounding rod are connected to the ends of the positive electrode plate, respectively. A pair of push-in fixing rods (82a, 82b) made of an electrically insulating material having a cross-sectional shape that can be pushed into the bifurcated portion of the piece and the end piece of the negative electrode plate, and extending in the vertical direction. The electrostatic precipitator according to any one of claims 1 to 7.   The electrostatic precipitator according to any one of claims 1 to 8, wherein a diffusion net (5a) made of an electrically insulating material is provided at a boundary between the ionizer part and the collector part.   10. The electricity according to claim 1, wherein the positive electrode plate is formed of a metal flat plate (1 g) and a conductive resin film (1j) covering the periphery of the metal flat plate. Dust collector.

Images