JP3257268B2 - Spacer protrusion of dust collecting electrode plate and electrode plate laminate having the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer projection provided on a dust collecting electrode plate of an electric dust collecting element and an electrode plate laminate provided with the spacer projection.

[0002]

2. Description of the Related Art In general, an electric dust collecting element charges dust contained in air to be cleaned to one polarity (for example, a positive polarity) in advance by an ionizing portion, and charges the dust by a dust collecting portion. The collected dust is collected. The dust collecting section has an application electrode plate and a dust collection electrode plate. Both electrode plates are alternately stacked,
They are wound or arranged in parallel to form an electrode plate laminate. The electrode plate laminate is housed in a predetermined casing, and is disposed downstream of the ionization section in an air flow path passing through the electrostatic precipitating element.

At least one of the two electrode plates is a coated electrode plate in which a conductive material is coated with a resin sheet. When the two electrode plates are stacked, a spacer projection projecting in the stacking direction is interposed between the electrode plates to allow air to flow between the adjacent electrode plates with a stacking interval. FIG. 7 schematically shows a cross-sectional view of a main part of a conventional electrode plate laminate E.

Referring to FIG. 7, reference numeral 1a denotes an applied electrode plate, and reference numeral 1b denotes a dust collecting electrode plate. These applied electrode plates 1a and dust collecting electrode plates 1b are alternately laminated to form an electrode plate. This constitutes a laminate E. In addition, the outline arrow
The direction of the air which flows through the said air flow path is shown. Spacer projections 2a, 2b,... For maintaining a distance from the application electrode plate 1a are provided on the dust collection electrode plate 1b. . . Are formed in large numbers. These spacer projections have a predetermined span S along the direction of the air flow path, and the spacer projections 2a move toward the upper application electrode plate 1a side, and the adjacent spacer projections 2b
Is applied to the lower applied electrode plate 1a side, and the applied electrode plates 1a
It protrudes alternately toward.

[0005]

As described above, each of the spacer protrusions 2a, 2b. . . Thus, the distance between the dust collecting electrode plate 1b and the application electrode plate 1a is kept constant. However, when the electrode plates 1a and 1b are actually laminated, the dust collecting electrode plate 1b A phenomenon called wave depression occurs between the electrode plates 1a. This is because, due to the large span S, the spacer protrusions 2a and 2c tend to move downward in the figure, and the spacer protrusions 2b and 2d tend to move upward in the figure. There is a dust collecting electrode plate 1b between each spacer protrusion.
Is considered to be deformed. When such a wobbling phenomenon occurs, there is a problem that a gap between the dust collecting electrode plate 1b and the applying electrode plate 1a becomes wide and narrow, and the dust collecting efficiency is reduced. In addition, when a portion where the distance between the dust collecting electrode plate 1b and the application electrode plate 1a is extremely narrow occurs, after the electrode plate laminate E is washed in this portion, water accumulates due to a capillary phenomenon. There is also.

In order to solve the above-mentioned problem, the number of spacer projections may be increased to maintain a constant distance between the dust collecting electrode plate 1b and the application electrode plate 1a. In addition, a new problem arises in that the pressure loss of the air flowing through the electrode plate laminate E (the air flowing in the direction of the white arrow) increases. Therefore, purpose of the invention is to provide a distance spacer protrusions of the dust-collecting electrode plate can be kept constant in a reliable manner of between the collection electrode plate and the applied electrode plate.

[0007]

Means and operation for solving the problems] To achieve the above first, the spacer protrusions dust collecting electrode plate according to claim 1, a planar application electrode plate that the conductive member is coated with a resin sheet The two electrodes interposed between the applied electrode plate and the plate-shaped dust collecting electrode plate parallel and alternately stacked, and provided on the dust collecting electrode plate to maintain a stacking interval between the two electrode plates. A spacer projection of a dust collecting electrode plate that rises and falls in the stacking direction of the plate, wherein the spacer projection includes a pair of cut and raised pieces each having a base end at an edge of one opening provided on the dust collecting electrode plate. One of the cut and raised pieces is cut and raised on the side of the applied electrode plate adjacent to one surface of the dust collecting electrode plate, and the other cut and raised piece is formed on the applied electrode plate adjacent to the other surface of the dust collecting electrode plate. It is cut and raised on the plate side, and a pair of opposing
The base of one cut and raised piece is provided at one of the edges.
And a base end of the other cut-and-raised piece is provided at the other edge .

[0008] According to the above structure, one of the cut and raised pieces prevents the dust collecting electrode plate from being displaced toward the applied electrode plate adjacent to the one surface at the position where the cut and raised piece is formed. Can be. Further, the other cut-and-raised piece can prevent the dust collecting electrode plate from being displaced toward the applied electrode plate adjacent to the other surface at the position where the cut-and-raised piece is formed. In addition, since both cut and raised pieces each have a base end at the edge of one opening provided in the dust collecting electrode plate, both cut and raised pieces can be formed at positions close to each other. Therefore, in a position where both cut-and-raised pieces are formed, a so-called strut is provided on both sides of the dust collecting electrode plate, and it is possible to prevent the dust collecting electrode plate from being displaced to the adjacent application electrode plate side. Can be. As a result, the distance between the dust collecting electrode plate and the application electrode plate can be reliably kept constant.

[0009] pressurized forte, in the case of mold forming a cut-and-raised pieces, one mold of a pair of molds, provided one core and the other cavity for the lug piece formed for cut-and-raised piece formed Along with the other mold, a cavity for forming the one cut and raised piece and a core for forming the other cut and raised piece are provided,
By moving the pair of molds in the mold clamping direction, the pair of cut-and-raised pieces can be easily formed without using a particularly complicated mold configuration.

[0010] To achieve the above first, the spacer protrusions dust collecting electrode plate according to claim 2, a conductive member to the resin sheet
A plate-like applied electrode plate which is more covered, and the applied electrode
Between the plate and the plate-shaped dust collecting electrode plate
Interposed between the two to maintain the stacking interval between the two electrode plates
Up and down in the stacking direction of both electrode plates
A spacer projection of the collecting electrode plate,
The protrusion is located on the edge of one opening provided in the dust collection electrode plate.
A pair of cut and raised pieces each having a proximal end,
Cut to the side of the applied electrode plate adjacent to one surface of the dust collection electrode plate.
And the other piece is on the other side of the dust collection electrode plate.
And the base ends of both cut-and-raised pieces are provided at one edge of the opening adjacent to each other. According to the above configuration, a pair of switching Okoshihen, since a state of being arranged in one edge of the opening can be formed in an extremely close positions both switching Okoshihen. Therefore, it is possible to more effectively suppress the dust collecting electrode plate from being displaced to any of the adjacent application electrode plates, and to more reliably maintain a constant distance between the dust collecting electrode plate and the applied electrode plate. be able to.

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a partially cutaway perspective view showing a dust collecting electrode plate on which spacer protrusions are formed according to an embodiment of the present invention and a main part of an electrode plate laminate including the same. FIG. It is an A- arrow view. FIG. 3 is a view schematically showing an electric dust collecting element provided with the electrode plate laminate of FIG.

Referring to FIG. 3, this electrostatic precipitating element EL includes a casing 10 for defining an air flow path PH of air to be cleaned inside. 20 and an electrode plate laminate 30 disposed downstream of the ionization section 20.
Then, air is flowed along the air flow path PH, and the dust and the like contained in the air are charged by the ionization unit 20, and the charged dust and the like are collected by the electrode plate laminate 30. ing.

The ionization section 20 is provided in the casing 10
And an ionization line 21 which is stretched in the vicinity of an air inlet (not shown) and to which a high voltage having a positive polarity (for example, 7 KV) is applied.
H-side counter electrode plate 22 facing in the direction orthogonal to H
And The electrode plate laminate 30 includes an application electrode plate 31 and a dust collection electrode plate 32, which are alternately laminated with a space through which air can flow, and both electrode plates 3
In order to maintain the laminating interval between the electrode plates 31 and 32, there are provided plate-shaped spacer protrusions 100 and 200 that are undulating in the laminating direction N of the electrode plates 31 and 32. . It should be noted that although simplified in FIG. 3, each of the electrode plates 31 and 32 is actually, for example, 1.8 mm apart from each other.
With a small lamination interval h, for example, 50 to 9
The layers are stacked in 0 stages.

The application electrode plate 31 is provided with the ionized radiation 2
An electrode plate including a conductive member 31a to which a high voltage (for example, 3 KV) having the same polarity as 1 is applied, and a covering member 31b that covers the conductive member 31a. More specifically, this application electrode plate 31 is, for example, a so-called mold in which a conductive resin is printed on a sheet material made of polyethylene terephthalate or the like, and a polyethylene terephthalate sheet material is laminated thereon. It is a type electrode plate, and the above-mentioned conductive resin constitutes the above-mentioned conductive member 31a, and a sheet material of polyethylene terephthalate constitutes the above-mentioned covering member 31b.

Referring also to FIG. 1, the dust collecting electrode plate 3
Numeral 2 is formed of a conductive member, and is connected to an electrode on the ground side. In this embodiment, the dust collecting electrode plate 32
Is made of, for example, spring steel having a thickness of 50 μm. Further, the dust collecting electrode plate 32 is formed with the spacer protrusions 100 and 200 formed integrally by cutting and raising.
have. These spacer projections 100 and 200
The spacer projections 100 are provided at four locations alternately along the direction of the air flow path PH. The spacer projections 100 are provided at two locations on both ends of the dust collecting electrode plate 32, and the spacer projections 200 are provided between the spacer projections 100. There are two locations.

The spacer projection 200 is formed by a cut-and-raised piece having a base end at the edge 32b of the opening 32a provided in the dust collecting electrode plate 32. This cut and raised piece uses a predetermined mold (for example, using a male mold having a core for forming a cut and raised piece, and a female mold having a cavity for forming a cut and raised piece into which the core can be inserted, The dust collecting electrode plate 32 is sandwiched between them.)
Thus, the dust collecting electrode plate 32 is cut and raised simultaneously with the formation of the opening 32a. These two spacer projections 200 are cut and raised in opposite directions. Further, the tip portion 201 of the cut and raised piece is formed in a substantially arc shape bent in a direction away from the applied electrode plate 31 with which the cut and raised piece is in contact, and does not damage the opposing applied electrode plate 31. It has become.

Referring to FIG. 1, a feature of the present embodiment lies in the shape of the spacer projection 100. That is, the spacer projection 100 includes a pair of cut and raised pieces 101 and 102 provided on the dust collecting electrode plate 32. And the base end of one of the cut-and-raised pieces 101 is the one opening 103
Of the pair of edges facing each other in a direction orthogonal to the direction of the air flow path PH, is provided at one edge 104, and the base end of the other cut-and-raised piece 102 is provided at the other edge 105. One of the cut and raised pieces 101 is cut and raised on the side of the application electrode plate 31 adjacent to the upper side of the dust collection electrode plate 32, and the other cut and raised piece 102 is formed on the lower side of the dust collection electrode plate 32. In that it is cut and raised on the side of the application electrode plate 31 adjacent to.

The tip portions of the cut and raised pieces 101 and 102, that is, the portions 101a and 102a that are in contact with the adjacent application electrode plates 31 are substantially circular like the tip portions 201 of the cut and raised pieces of the spacer projection 200. It is formed in an arc shape so as not to damage the opposing application electrode plate 31. According to this embodiment, the following operational effects can be obtained. That is, the cut and raised piece 101 can prevent the dust collecting electrode plate 32 from being displaced toward the application electrode plate 31 adjacent to the upper side at the position where the cut and raised piece 101 is formed. Further, the dust collecting electrode plate 3 is located at a position where the cut and raised piece 102 is formed.
2 can be prevented from displacing toward the application electrode plate 31 adjacent to the lower side. In addition, both cutting pieces 101, 10
2 has a base end at the edges 104 and 105 of one opening 103 provided in the dust collecting electrode plate 32,
01 and 102 can be formed at positions close to each other. Therefore, at the position where both the cut-and-raised pieces 101 and 102 are formed, so-called struts are provided on the upper and lower sides of the dust collecting electrode plate 32, and the dust collecting electrode plate 32 is located on the side of the application electrode plate 31 which is adjacent to which. Can also be suppressed from being displaced. As a result, the dust collecting electrode plate 32 and the applying electrode plate 31
Can reliably be kept constant.

Moreover, in this embodiment, each of the cut and raised pieces 101,
Since the respective base ends of the openings 102 are provided at the edges 104 and 105 of the one opening 103 facing each other in a direction orthogonal to the direction of the air flow path PH, as shown in FIG. The cut-and-raised pieces 101 and 102 can be arranged on a straight line in the stacking direction N. Accordingly, the displacement of the dust collecting electrode plate 32 to any of the adjacent application electrode plates 31 can be more effectively suppressed, and the distance between the dust collecting electrode plate 32 and the applied electrode plate 31 can be further increased. It can be reliably kept constant.

Further, as described above, each of the cut and raised pieces 101, 1
Since the base end of each of the cut-out pieces 101 and 102 is formed at the opposing edges 104 and 105 of the one opening 103, respectively, One mold is provided with a core for forming the cut and raised piece 101 and a cavity for forming the cut and raised piece 102, and the other mold is provided with a cavity for forming the cut and raised piece 101 and the cut and raised piece. By providing a core for forming the mold 102 and moving the pair of molds in the mold clamping direction, it is possible to easily form both the cut-and-raised pieces 101 and 102 without using a particularly complicated mold structure. There are advantages.

In this embodiment, each of the cut and raised pieces 101, 1
02 are provided on the edges 104 and 105 facing each other in a direction orthogonal to the direction of the air flow path PH, but are provided on the edges facing the direction along the direction of the air flow path PH. Is also good. Referring to FIG. 2, in electrode plate laminate 30 having dust collecting electrode plate 32 on which such spacer protrusions 100 are formed, both ends of dust collecting electrode plate 32 may be applied to adjacent one of application electrode plates 31. Since the dust collecting electrode plate 32 can be securely fixed so as not to be displaced to the side, it is possible to suppress the phenomenon that the dust collecting electrode plate 32 has a wave between adjacent application electrode plates 31. Therefore, the dust collecting electrode plate 32 and the applying electrode plate 31
Can be reliably maintained constant in the direction of the air flow path PH, and as a result, a reduction in the dust collection efficiency of the electrode plate laminate 30 can be prevented.

Moreover, since the lamination interval can be kept constant by the spacer projections 100, there is no need to increase the number of spacer projections as compared with the conventional one. Therefore, the pressure loss of the electrode plate laminate 30 can be suppressed low, which can contribute to the improvement of the performance of the electric dust collector. further,
Since the stacking interval can be kept constant, there is no portion where the stacking interval becomes extremely narrow. Thereby, even if maintenance such as cleaning is performed on the electrode plate laminate 30, drainage is very good, and there is an advantage that water does not accumulate in the electrode plate laminate 30.

In this embodiment, the spacer projection 200 is used.
Are formed at a predetermined interval, but if the interval is narrowed, the displacement of the dust collecting electrode plate 32 at the position where the spacer protrusion 200 is formed can be suppressed. As a result, the dust collecting electrode plate 32 The distance between the electrode and the application electrode plate 31 can be more reliably kept constant. Further, in the present embodiment, the spacer projections 100 are provided only on both end sides of the dust collecting electrode plate 32.
00 can also be formed.

Next, a modified example of the spacer projection 100 will be described. (1) First Modification Referring to FIG. 4, a spacer projection 300 according to this modification is shown.
However, the difference from the spacer projection 100 is that the base ends of both the cut and raised pieces 101 and 102 are adjacent to each other and the opening 3
01 is provided on one edge 302. The other configuration is the same as that of the spacer projection 100, and thus the description thereof is omitted.

According to the spacer projection 300 according to this modification, the following specific effects can be obtained. That is,
Since the pair of cut and raised pieces 101 and 102 are arranged side by side at one edge 302 of the opening 301,
102 can be formed in a very close position.
Accordingly, it is possible to effectively prevent the dust collecting electrode plate 32 from being displaced to any of the adjacent application electrode plates, and to more surely keep the distance between the dust collecting electrode plate 32 and the applied electrode plate constant. it can.

In particular, in this modification, the air passage PH
Are arranged side by side in the direction along, so that the distal end portions 101a, 1 of the cut and raised pieces 101, 102
The horizontal distance 02a in the direction orthogonal to the direction along the air flow path PH can also be extremely reduced. Therefore,
The deformation of the dust collecting electrode plate 32 in the direction orthogonal to the direction along the air flow path PH can also be suppressed, and the dust collecting electrode plate 32
The distance between the electrode and the application electrode plate can be more reliably kept constant.

The cut-and-raised pieces 101 and 102 may be juxtaposed in a direction orthogonal to a direction along the air flow path PH. (2) Second Modified Example Referring to FIG. 5, a spacer projection 400 according to this modified example will be described.
However, what is different from the spacer projection 100 is that the cut-and-raised piece 101 is formed of one of the adjacent openings 401 and 402 provided in the dust collecting electrode plate 32.
01 has a base end at one edge 403 thereof.
2 has a base end at one edge 404 of the other opening 402, and the base end of the cut-and-raised piece 101
1 is provided at an edge farther from the other opening 402;
The base end of the cut-and-raised piece 102 is connected to the other opening 402.
Is provided at the edge farther from one opening 401. The other configuration is the same as that of the spacer projection 100, and thus the description thereof is omitted.

According to the spacer projection 400 according to this modification, the following specific effects can be obtained. That is,
Since only one cut-and-raised piece 101, 102 is formed in each of the openings 401 and 402, the cut-and-raised piece can be formed more easily than when a plurality of cut-and-raised pieces are formed in one opening. it can. More specifically, when forming the cut-and-raised pieces, generally, one mold for holding the dust collecting electrode plate and another mold for moving and punching the dust collecting electrode plate are used. The cut and raised piece is formed simultaneously with the formation of the opening.In this manner, when forming a plurality of cut and raised pieces in one opening, the plurality of cut and raised pieces are simultaneously punched with the mold. Since it is necessary to separate and form the cut-and-raised pieces, a cut portion must be provided in advance. Because, if the notch is not provided, in order to separate into a plurality of cut and raised pieces at the same time as punching, it is necessary to tear this cut and raised piece into a plurality while forming one cut and raised piece. Because it is very difficult. On the other hand, in the present modified example, it is not necessary to provide the above-described cut portions, and the cut-and-raised pieces 101 and 102 can be formed easily with reduced man-hours.

In addition, a pair of adjacent openings 401 and 40
2, the bases of the cut and raised pieces 101 and 102 are provided at the edges 403 and 404 on the far side of each other.
Deformation and the like generated in the dust collecting electrode plate 32 when
It is unlikely to be an obstacle when cutting and raising the cutting piece 102. That is, since the cut-and-raised piece 102 is on the far side from the cut-and-raised piece 101, the cut-and-raised piece 102 is formed in an irregular shape due to deformation of the dust collecting electrode plate 32 generated when the cut-and-raised piece 101 is cut and raised. There is an advantage that the cut-and-raised piece as designed can be easily formed.

Further, as shown in FIG.
01 to the other opening 402 of one opening 401
Is provided on the edge portion 405 on the side close to
May be provided at the edge 406 of the other opening 402 on the side close to the one opening 401. In this way, the cut and raised pieces 101 and 102 are cut and raised in a state of being back to back with each other. Thereby, both cut-and-raised pieces 101 and 102 can be formed at positions extremely close to each other in both the direction of the air flow path PH and the direction orthogonal to this direction. Therefore, at the position where both the cut-up pieces 101 and 102 are formed, the displacement of the dust collecting electrode plate 32 to the adjacent application electrode plate side can be more effectively suppressed, and the dust collecting electrode The distance between the plate and the applied electrode plate can be more reliably kept constant.

[0039]

According to the invention of 請 Motomeko 1 according to the present invention, by a pair of cut-and-raised piece formed in close positions, in the position where the cut-and-raised pieces are formed, the dust collecting electrode plate, adjacent to either Displacement can also be suppressed to the applied electrode plate side, so that the distance between the dust collecting electrode plate and the applied electrode plate can be kept constant, and the electric field between both electrode plates is kept constant. can do.

The pressurized forte, the respective base ends of the switching Okoshihen, one of the openings provided in the dust collecting electrode plate, because provided respectively on opposite edges to each other, when the mold forming a pair of cut-and-raised pieces In particular, it is possible to easily form a pair of dies by moving the pair of dies in the mold clamping direction without using a complicated mold configuration.

[0041] According to the invention of 請 Motomeko 2, cut-and-raised piece one pair, because is arranged in close proximity to a position of one edge of the opening, the dust collecting electrode plate adjacent to one application Displacement to the electrode plate side can be suppressed more effectively, and the electric field between the dust collecting electrode plate and the applied electrode plate can be more reliably maintained constant.

[0042]

[0043]

[0044]

[0045]

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view illustrating a main part of a dust collecting electrode plate on which spacer protrusions are formed and an electrode plate laminate including the same according to one embodiment of the present invention.

FIG. 2 is a diagram viewed from an arrow A in FIG.

FIG. 3 is a diagram schematically showing an electric precipitating element provided with an electrode plate laminate according to one embodiment.

FIG. 4 is a perspective view of a main part showing a spacer projection according to a first modification.

FIG. 5 is a perspective view of a main part showing a spacer projection according to a second modification.

FIG. 6 is a perspective view of a main part showing a spacer protrusion according to a second modification.

FIG. 7 is a diagram schematically showing a cross section of a main part of a conventional electrode plate laminate.

[Explanation of symbols]

 Reference Signs List 30 electrode plate laminate 31 applied electrode plate 31a conductive member 31b covering member 32 dust collecting electrode plate 100 spacer projection 101 cut piece 102 cut piece 103 opening 104 edge 105 edge 300 spacer projection 301 opening 302 edge 400 spacer projection 401 opening 402 opening 403 edge 404 edge 405 edge 406 edge

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-31200 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B03C 3/00-3/88

Claims (2)

(57) [Claims] An electrically conductive member (31a) is formed on a resin sheet (31).
a plate-like applied electrode plate (31) covered by b)
And a plate-shaped dust collecting electrode plate (32), which is parallel and alternately stacked with the application electrode plate (31), and sets a stacking interval (h) between the two electrode plates (31, 32). Both electrode plates (3) provided on the dust collection electrode plate (32) for maintenance.
1, 32) in the stacking direction (N) of the dust collecting electrode plate (100 ) , wherein the spacer protrusion (100 ) is provided on one of the dust collecting electrode plates (32). The edge (104, 10 ) of the opening (103 )
5) A pair of cut and raised pieces (101, 1 ) each having a base end.
02), and one of the cut and raised pieces (101) is cut and raised on the side of the application electrode plate (31) adjacent to one surface of the dust collecting electrode plate (32), and the other cut and raised piece (102) is formed. ) Is cut and raised on the side of the application electrode plate (31) adjacent to the other surface of the dust collection electrode plate (32), and a pair of opposite edges (10) of the one opening (103).
4, 105), one edge (104)
A base end of the raised piece (101) is provided, and the other edge (10
5) is provided with a base end of the other cut-and-raised piece (102).
0). 2. The method according to claim 1, wherein the conductive member is formed of a resin sheet.
a plate-like applied electrode plate (31) covered by b)
And alternately and in parallel with the applied electrode plate (31).
Between the flat dust collecting electrode plate (32)
To maintain the interval (h) between the plates (31, 32).
The two electrode plates (3) provided on the dust collection electrode plate (32)
1, 32) of the dust collecting electrode plate that undulates in the stacking direction (N).
The spacer projection (300), which is a pacer projection (300), is provided on the dust collecting electrode plate (32).
It is located at the edge (302) of the opening (301) provided.
From a pair of cut and raised pieces (101, 102) each having a base end
Becomes, one cut-and-raised piece (101), the dust collecting electrode plates one of (32)
Cut and raised on the side of the applied electrode plate (31) adjacent to the surface .
And the other cut-and-raised piece (102) is provided on the dust collecting electrode plate (32).
Cut and raised on the side of the applied electrode plate (31) adjacent to the other surface
And a base end of each of the cut- and- raised pieces (101, 102) is provided adjacent to each other at one edge (302) of the opening (301). Projection (30
0).