JP3261167B2 - Electric dust filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric dust filter, and more particularly to a technique of an indoor air purifier which applies electric charges to dust contained in indoor air and collects the dust with the dust filter.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 21, this kind of electric dust filter has a pre-filter 1, an ionizing electrode 21 ', a dust collecting electrode 3, a deodorizing filter 4 along a blowing direction A.
And the fan 5 are arranged in this order. The polluted air of the atmosphere is first guided to the pre-filter 1 to remove large dust, and the small dust is positively charged by the ionization electrode 21 '. . That is, the ionization electrode 21 ′ is composed of the discharge wire E and the counter electrode plate 2 a opposed thereto.
And a high voltage (for example, 6 KV) is applied to the discharge line E.
Is applied and the return electrode plate 2a is grounded, thereby generating corona discharge and generating positive ions.
Therefore, the small dust that has passed through the pre-filter 1 is positively charged between the electrode portions 2a, 2a, and
Dust is collected. Thereafter, the odor of air is deodorized by the deodorizing filter 4, and clean air is supplied through the fan 5.

[0003] However, the dust collecting electrode 3 has a drawback that it is heavy because it is composed of a large number of aluminum plates. Therefore, in order to reduce the weight of the dust collecting electrode 3, recently, as shown in FIG. 19, a film-like electrode 20 wound spirally and housed in a housing 83 has been proposed. As shown in FIG. 20, the film-shaped electrode 20 includes a band-shaped positive electrode 18 obtained by sandwiching and laminating a band-shaped electric insulating layer 16 and a band-shaped electric conductive layer 17 such as an aluminum foil having a slightly smaller width. Uneven spacer 1
9a and 19b are composed of a flexible negative electrode 19 which is bent in a waveform and is flexible.
In a state where the cathode electrode 19 and the strip-shaped negative electrode 19 are superimposed, a large number of air passages a shown in FIG. 19 are formed between the electrodes 18 and 19 by the spacers 19 a and 19 b of the strip-shaped negative electrode 19. Then, the connection end 18 of the belt-like positive electrode 18
a is connected to the anode side via one terminal 80,
By connecting the connection end portion 19a 'of the band-shaped negative electrode 19 to the cathode side via the other terminal 80, the dust positively charged in the ionization electrode 2 (FIG. 21) was led to the above-mentioned many air passages a. At this time, the negative electrode 19 is collected by the band-shaped negative electrode 19.

[0004]

However, FIG.
And a large number of spacers 19a and 19b as shown in FIG.
In the strip-shaped negative electrode 19 in which the electric field intensity is weakened in the respective inner regions of the spacers 19a and 19b, the positively charged dust is captured in the regions where the electric field intensity of the spacers 19a and 19b is weak. Collection becomes impossible and dust collection performance becomes poor. In addition, when the film-shaped electrode 20 is spirally wound, the strip-shaped negative electrode 1 bent in a waveform is used.
When a tensile force is applied to 9, the strip-shaped negative electrode 19 is elongated, and the spacers 19a and 19b are easily crushed. For this reason,
The interval of the air passage a between the strip-shaped negative electrode 19 and the strip-shaped positive electrode 18 becomes unstable, and the collecting performance is further deteriorated.
Also, by bending the strip-shaped negative electrode 19 into a waveform, the entire length of the strip-shaped negative electrode 19 becomes longer by the amount of bending, the material cost increases, and the space occupied by the spacers 19a and 19b in the air passage a increases. As a result, there have been various problems such as an increase in pressure loss and a decrease in operating efficiency.

[0005] The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide an excellent dust collection performance.
An object of the present invention is to provide an electrostatic precipitating filter that can reduce material costs and has high operating efficiency.

[0006]

In order to solve the above-mentioned problems, the invention according to the first aspect of the present invention relates to a method of forming an electric conductive layer 17 on the front and back surfaces.
Each is a band-shaped electric insulation wider than the electric conductive layer 17.
A film-shaped electrode 20 is formed by laminating a band-shaped positive electrode 18 covered with the layer 16 and a band-shaped negative electrode 19 formed of a band-shaped electric conductive layer 17, and the film-shaped electrode 20 is spirally wound. An air passage a is provided between the belt-shaped positive electrode 18 and the band-shaped negative electrode 19 in the middle of the air passage, and the strip-shaped negative electrode 19 has a plurality of thin plate-shaped cut-and-raised pieces 50 in contact with the band-shaped positive electrode 18. Are cut and raised, and a portion 50a of the cut and raised piece 50 that is in contact with the belt-shaped positive electrode 18 is formed into a curved surface.
The air passage a between 8, 19 is maintained at a constant interval.

The cut-and-raised piece 50 may have the following aspects. That is, the transmission in the cut-and-raised piece 50
Both ends 50b and 50c in the wind direction A are cut off from the strip-shaped negative electrode 19 and cut off in a squeezed shape, respectively, or both ends 50b and 50c in the blowing direction A of the cut and raised piece 50 are cut off from the strip-shaped negative electrode 19. Fragment 50 with
A portion of one end in a direction intersecting with the blowing direction A is separated from the strip-shaped negative electrode 19 and is in contact with the strip-shaped positive electrode 18.
The portion from 50a to this one end is located on the strip-shaped negative electrode 19 side.
Those formed as a folded piece portion 51 toward, or, feed
The shape as viewed in the wind direction A is cut and raised into a mountain shape or a ∧ shape , or the strip-shaped positive electrode 1 of the cut and raised piece 50.
A projection 50 provided on a portion 50a in contact with the base 8, or a reinforcement 50 provided on a skirt 50e of the cut-and-raised piece 50 rising from the strip-shaped negative electrode 19; or
The reinforcing member 56 extends from a skirt portion 50e of the cut-and-raised piece 50 to a portion 50a in contact with the belt-shaped positive electrode 18, or both ends 50b and 50c of the cut-and-raised piece 50 in the blowing direction A are strip-shaped negative electrodes. 19 and a direction intersecting with the blowing direction A in the cut-and-raised piece 50
b, one end of which is cut off from the strip-shaped negative electrode 19 and the tip of a folded piece 51 bent toward the strip-shaped negative electrode 19 is locked by a locking portion 52 provided on the strip-shaped negative electrode 19; Alternatively, the second cut-and-raised piece 50 ′ is turned from the folded piece portion 51 of the cut-and-raised piece 50 toward the inside of the cut-and-raised piece 50.
And the tip of the cut-and-raised piece 50 'is brought into contact with the base 50d of the cut-and-raised piece 50 facing the folded piece portion 51, or the outside of the cut-and-raised piece 50 from the base 50d of the cut-and-raised piece 50 The third cut-and-raised piece 50 ″ is cut and raised, and the tip of the cut-and-raised piece 50 ″ is
Or the cut-and-raised piece 50 is cut and raised in both directions of the strip-shaped negative electrode 19, or the cut-and-raised piece 50 is adjacent to the strip-shaped negative electrode 19. The strip-shaped negative electrode 19 that is alternately cut and raised in both directions, or the strip-shaped negative electrode 19 is formed wider than the strip-shaped positive electrode 18, and both end portions 19 of the strip-shaped negative electrode 19 in the width direction c.
a, Holes 5 for forming cut-and-raised pieces 50 in 19b
3 may be perforated.

[0008] The invention according to claim 14 is an electric conductive device.
Each of the front and back surfaces of the layer 17 is wider than the electrically conductive layer 17.
Positive electrode 18 covered with a band-like electric insulating layer 16
And a strip-shaped negative electrode 19 formed of a strip-shaped electrically conductive layer 17 to form a film-shaped electrode 20. The film-shaped electrode 20 is spirally wound and arranged in the middle of a ventilation passage, and Air between the electrode 18 and the strip-shaped negative electrode 19
A passage a is formed, and the band-shaped negative electrode 19 is connected to the band-shaped positive electrode 18.
, And a plurality of thin pieces 54 whose longitudinal directions coincide with the blowing direction A are erected, and portions 54a of the thin pieces 54 that are in contact with the band-shaped positive electrode 18 are formed in a curved surface shape. Thus, the air passage a between the electrodes 18 and 19 is maintained at a constant interval.

The thin plate piece 54 may be formed integrally with the strip-shaped negative electrode 19, or may be made of a metal material.

[0010]

According to the present invention, a plurality of thin plate-shaped cut-and-raised pieces 50 (or thin plate pieces 54) are cut and raised from the strip-shaped negative electrode 19, and come into contact with the strip-shaped positive electrode 18 of the cut-and-raised piece 50.
The portion 50a is formed in a curved shape, and the strip-shaped negative electrode 19 is formed.
Electrode 20 formed by laminating a positive electrode 18 and a belt-like positive electrode 18
When spirally wound, the air passage a formed between the electrodes 18 and 19 is maintained at a constant interval by the cut-and-raised pieces 50. Unlike the case where the band-like negative electrode 19 is bent in a waveform, a region where the electric field intensity is weakened does not occur in the strip-shaped negative electrode 19, so that the performance for collecting dust can be kept good. In addition, even if a tensile force is applied to the strip-shaped negative electrode 19 when the film-shaped electrode 20 is spirally wound, unlike the conventional corrugated spacer, the cut-and-raised piece 50 is hard to be crushed. The distance between the air passages a can be accurately and stably maintained. Further, by making the cut-and-raised pieces 50 function as spacers, it is not necessary to bend the band-shaped negative electrode 19 into a waveform as in the related art, and the total length of the band-shaped negative electrode 19 can be shortened to save material costs as much as possible. Become. Furthermore, by forming the cut-and-raised piece 50 in a thin plate shape, the space occupied by the cut-and-raised piece 50 in the air passage a can be reduced, and the pressure loss can be reduced.

[0011]

Embodiment (Embodiment 1) The electrostatic precipitating filter used in this embodiment is shown in FIG.
As shown in (c), the operation panel A1 for controlling the operation of the air purifier, the display panel B for displaying the operation state, and the thin box-shaped purifier body 10 equipped with a control circuit and the like (not shown) are housed. In addition, a suction port 11 is provided on a lower surface portion of the purifier main body 10, and a discharge port 12 is provided on an upper front portion of the purifier main body 10. This purifier body 10
In the inside, a pre-filter 1, an ionization electrode 2, a dust collection electrode 13, a deodorizing filter 4, and a cross-flow fan 1 are arranged along a blowing direction A from the suction port 11 to the discharge port 12.
5 are arranged in this order. The cross flow fan 15 is arranged inside the discharge port 12. When the cross flow fan 15 is driven to rotate by the motor 14, dirty air is sucked from the suction port 11, and large dust is removed in the pre-filter 1. The small dust is positively charged by the ionization electrode 2 and the dust collection electrode 13
, The odor of air is deodorized by the deodorizing filter 4, and clean air is supplied through the cross flow fan 15.

[0012] As shown in FIG.
Upper and lower ends 83a. Housings 8 each having an opening 83b
3 and a film-like electrode 20 which is wound and housed in the housing 83. The plurality of engaging members 85 shown in FIG.
Are individually attached, and the engagement claws 86 provided on each engagement member 85 are provided.
Is engaged with an engaging portion 87 provided on the outer surface of the housing 83, so that the film-shaped electrode 20 can be stored and held in the housing 83 by the engaging member 85. On the other hand, the film-shaped electrode 20 is as shown in FIG.
As shown in (b), the belt-like positive electrode 1 made of a laminated film obtained by sandwiching and laminating the belt-like electric insulating layer 16 and the band-like electric conductive layer 17 slightly narrower than this.
And a flexible strip-shaped negative electrode 19 formed by cutting and raising a plurality of thin plate-shaped cut-and-raised pieces 50. The laminated electrical insulating layer 16 is made of, for example, a polyester film, and the electrical conductive layer 17 is made of, for example, an aluminum foil. On both front and back surfaces of the strip-shaped negative electrode 19, a large number of thin plate-shaped cut-and-raised pieces 50 are formed by being cut and raised.
Each cut-and-raised piece 50 forms a large number of air passages a parallel to the blowing direction A between the electrodes 18 and 19. Connecting terminals 80 are joined to both ends of the film-shaped electrode 20 in the longitudinal direction by eyelets 40 (see FIG. 4). The film-shaped electrode 20 is spirally wound and housed and held in the housing 21. In this state, the connection terminals 80 are engaged with terminal engagement grooves 84 (see FIG. 4) formed in the housing 83 and are exposed outside the housing 83. Then, the connection terminal 80 on the side of the band-shaped positive electrode 18 is connected to the anode (for example, DC + 2.5 KV) side, and the connection terminal 80 on the side of the band-shaped negative electrode 19 is connected to the cathode side. In ()), the positively charged dust is guided to a large number of air passages a in the dust collecting electrode 13 and sucked by the belt-shaped negative electrode 19 to be collected.

Next, various aspects of the cut-and-raised piece 50 for keeping the interval of the air passage a constant will be described.

[0014] First, the cut and raised piece 50 shown in FIG. 5, both end portions 50b extending in the blowing direction A, 50c is band-shaped negative electrode 19
And cut into a mountain shape or a に shape in the shape of an aperture. In this manner, the cut-and-raised piece 50 is shaped like a mountain or
Since the pressure loss can be reduced and the strength of the cut-and-raised piece 50 itself can be increased by cutting and raising in the shape of a thin plate, the gap of the air passage a between the band-shaped negative electrode 19 and the band-shaped positive electrode 18 can be increased. Can be kept constant with high accuracy, and the trapping performance can be improved.

The cut-and-raised piece 50 shown in FIG. 6 has two end portions 50b and 50c extending in the air blowing direction A.
Air from the cut-and-raised pieces 50
One end in the direction b intersecting with the direction A is cut off from the strip-shaped negative electrode 19, and further separated from the portion in contact with the strip-shaped positive electrode 18.
Is folded toward the strip-shaped negative electrode 19 side
It is formed as a strip. By providing such a folded piece portion 51, the shape of the mountain-shaped or 山 -shaped cut and drawn shape shown in FIG. 5 can be formed unless the material elongation is large or the cut-and-raised height is low. Although not possible, this embodiment has the advantage that the tall cut-and-raised piece 50 can be cut and raised easily without increasing the elongation of the material.

The cut-and-raised piece 50 shown in FIGS. 7A and 7B has a small projection 55 projecting from the center of a portion 50a in contact with the positive electrode 18 in a strip shape. The reason why the projection 55 is provided is, for example, when a minute end projection such as burrs is formed at a cut portion of the strip-shaped negative electrode 19 made of a thin aluminum plate, a strip-shaped positive electrode made of a laminate film. There is a possibility that the film may be damaged or the film may be broken at a contact portion with the film,
Department of the cut and raised piece 50 a projection 55 of small as in this embodiment
By protruding the portion 50a,
By keeping the portion 50a and the belt-shaped positive electrode 18 out of contact, it becomes possible to eliminate the problem of the belt-shaped positive electrode 18 being damaged or broken.

The cut-and-raised piece 50 shown in FIGS. 8A and 8B is formed by raising a reinforcing projection (reinforcing body) 56 at the center of a skirt 50 e rising from the strip-shaped negative electrode 19.
9 (a) and 9 (b). On the other hand, the cut-and-raised piece 50 shown in FIGS. 9 (a) and 9 (b) cuts and raises the reinforcing projection 56 from the center of the skirt 50e of the piece 50. The raised portion is formed so as to reach the center of the portion 50a in contact with the electrode 18, so that the strength against crushing can be improved.

The cut-and-raised piece 50 shown in FIG. 10 has two end portions 50b and 50c extending in the air blowing direction A.
With disconnected in a triangular shape from 9, the cut and raised piece 50
One end of the direction b intersecting the blowing direction A in is disconnected from the strip negative electrode 19, and contact with the strip anode 18
The part from this part to this one end is directed toward the strip-shaped negative electrode 19 side.
The tip of the folded piece portion 51 is locked by a locking portion 52 projecting from the strip-shaped negative electrode 19, while the cut-and-raised piece 50 shown in FIG. The cut-and-raised piece 50 is held in a mountain shape or a ∧ shape in any case so that it can exhibit strength against crushing. Become.

The cut-and-raised piece 50 shown in FIGS. 12 (a) and 12 (b) includes a second cut-and-raised piece from the folded piece portion 51 of the cut-and-raised piece 50 in addition to the locking structure by the locking portion 52. 5
0 'is cut and raised toward the inside of the piece 50,
The tip of the cut-and-raised piece 50 'is brought into contact with the base 50d of the cut-and-raised piece 50 facing the folded piece portion 51. On the other hand, the cut-and-raised piece 50 shown in FIGS.
In addition to the structure shown in FIGS. 12A and 12B, a third cut-and-raised piece 50 ″ is cut and raised toward the outside of the cut-and-raised piece 50 at the base 50d of the cut-and-raised piece 50. The tip of the raised piece 50 ″ is brought into contact with the surface of the strip-shaped negative electrode 19. In each case, the cut and raised piece 50 has a mountain shape.
By maintaining the shape of the cut-and-raised piece 50 in the direction b intersecting with the blowing direction A, the strength can be improved, while the strength against crushing can be improved.

The cut-and-raised piece 50 shown in FIG. 14 has a reinforcing projection 56 raised from the skirt 50e to a portion 50a in contact with the belt-shaped positive electrode 18, and the tip of the folded piece 51 is formed. It is locked to the locking portion 52 protruding from the strip-shaped negative electrode 19, that is, by further combining the structures shown in FIGS. 9A, 9B and 10 to further improve the strength. Can be.

The cut-and-raised pieces 50 shown in FIGS. 15 and 16 are obtained by cutting and raising adjacent cut-and-raised pieces 50 alternately in both directions of the strip-shaped negative electrode 19. Numerals 19 are formed wider than the band-shaped positive electrode 18 and both end portions 19 of the band-shaped negative electrode 19 in the width direction c.
A plurality of feed holes (pilot holes) 53 are formed in a and 19b. In this manner, the feed holes 53 necessary for manufacturing the strip-shaped negative electrode 19 are formed at both ends 19a and 19b in the width direction c of the strip-shaped negative electrode 19, that is, the non-collected non-electric field areas 19a and 19b deviating from the collected electric field area. Thus, the feed holes 53 can be formed without deteriorating the trapping performance of the strip-shaped negative electrode 19. Embodiment 2 Instead of the cut-and-raised piece 50 described with reference to FIGS. 1 to 16, in this embodiment, FIGS. 17A and 17B and FIG.
(A) As shown in (b), thin strips 54 made of synthetic resin are erected on both sides of the strip-shaped negative electrode 19, and the curved front end portion 54a of the strip-shaped piece 54 is connected to the strip-shaped positive electrode. 18
Is to be brought into contact with. The thin plate piece 54 can be formed by integral molding with the strip-shaped negative electrode 19, or by heat caulking (indicated by a broken line "A") with the strip-shaped negative electrode 19, and the like. By forming the portion 54a in a curved shape, the belt-shaped positive electrode 18 is prevented from being damaged or broken. Moreover, the pressure loss can be reduced by arranging the thin plate pieces 54 in parallel with the blowing direction A. Further, the thin plate piece 54 may be made of a metal material to reduce both the pressure loss and the strength.

In the above configuration, when assembling the dust collecting electrode 13, the strip-shaped negative electrode 1 shown in FIGS.
9, a thin plate-like cut-and-raised piece 50 is cut and raised in, for example, a triangular shape, and this band-like negative electrode 19 is laminated with a band-like positive electrode 18 made of a laminated film to form a film-like electrode 2.
Then, the film-shaped electrode 20 is spirally wound, housed in the housing 21, and held by the engaging member 85. At this time, the air passage a formed between the electrodes 18 and 19 is held at a constant interval by the cut-and-raised pieces 50, so that unlike the conventional case where the band-shaped negative electrode is bent into a waveform, the band-shaped negative electrode is bent. There is no region where the electric field intensity is weakened in the electrode 19, and the trapping performance can be kept good. In addition, even if a tensile force is applied to the strip-shaped negative electrode 19 when the film-shaped electrode 20 is spirally wound, unlike the conventional corrugated spacer, the cut-and-raised piece 50 is hard to be crushed. Air passage a between
Can be accurately and stably maintained. In addition, by making the cut-and-raised pieces 50 function as spacers, it is not necessary to bend the band-shaped negative electrode 19 into a waveform as in the conventional case, and the overall length of the band-shaped negative electrode 19 is shortened by that amount to reduce material cost. Can be planned. Further, since the cut-and-raised pieces 50 and 54 are formed in a thin plate-like triangle or upright shape, the cut-and-raised pieces 50 and 54 in the air passage a are formed.
Occupied space can be reduced, and accordingly, pressure loss can be reduced and operation efficiency can be improved.

Further, in this embodiment, the film-shaped electrode 20 can be stored and held only by mounting the engaging member 85 from the lower opening end 83b of the housing 83, so that there is an advantage that the assembling work can be easily performed. is there.

[0024]

As described above, according to the first aspect of the invention, the strip-shaped cut-and-raised piece in contact with the belt-shaped positive electrode is cut and raised by the strip-shaped negative electrode, and the cut-and-raised piece comes into contact with the strip-shaped positive electrode.
The portion is formed in a curved surface, and when the film-shaped electrode is spirally wound, the air passage formed between the two electrodes is held at a predetermined interval by the cut-and-raised pieces. It is possible to make the electrode easy to collect dust by preventing the area where the electric field strength is weakened.Moreover, when the film-shaped electrode is spirally wound, the cut-and-raised piece is hard to collapse, and the strength of the cut-and-raised piece is reduced. And the distance between the air passages between the two electrodes can be accurately and stably maintained. In addition, by making the thin plate-shaped cut-and-raised pieces function as spacers, the electrode material can be saved, and the space occupied by the cut-and-raised pieces in the air passage can be reduced to reduce pressure loss. As a result, it is possible to obtain an electric dust filter having excellent dust collecting performance, low cost, and high operating efficiency.

According to the second aspect of the present invention, the cut-and-raised piece is cut off from both ends of the cut-and-raised piece in the blowing direction from the strip-shaped negative electrode in a squeezed shape, so that the pressure loss can be reduced. The gap with the belt-like positive electrode can be accurately and uniformly formed, and the performance for collecting dust is further improved.

According to the invention of claim 3, wherein said switching Oko
Both ends in the blowing direction of the strip are separated from the strip-shaped negative electrode and intersect with the blowing direction of the cut-and-raised piece.
One end of the direction is disconnected from the strip negative electrode and strip electropositive
The part from the part in contact with the pole to this one end is a strip-shaped negative electrode
Because it was formed as a folded piece toward the side ,
Even if the extension of the electrode material is small, it is possible to form a tall cut-and-raised piece.

According to the fourth aspect of the present invention, the cut-and-raised piece has a mountain shape or a square shape when viewed in the blowing direction.
Since it is cut and raised to have a shape, it is possible to improve the strength against crushing.

According to the fifth aspect of the present invention, since the minute projections are provided at the portions of the cut-and-raised pieces that are in contact with the band-shaped positive electrodes, the cut-and-raised pieces and the belt-shaped positive electrodes are kept in non-contact by the projections. Therefore, it is possible to take all possible measures to prevent the strip-shaped positive electrode from being damaged or broken by the cut and raised piece.

According to the sixth and seventh aspects of the present invention, a reinforcing member is provided at a skirt portion of the cut-and-raised piece rising from the band-shaped negative electrode, or the reinforcing member is cut from the skirt portion of the cut-and-raised piece to the belt-shaped positive electrode. Since the portion is extended to the contact portion, the strength of the cut-and-raised piece is improved, so that the cut-and-raised piece is more difficult to be crushed when the film-shaped electrode is wound.

According to the eighth aspect of the present invention, both ends of the cut-and-raised piece in the blowing direction are separated from the strip-shaped negative electrode, and a direction intersecting with the blowing direction of the cut-and-raised piece is provided.
One end detached from the strip negative electrode, and because the strip-shaped negative electrode of folded folded piece portion toward the side tip was set to be locked to a locking portion provided on the strip negative electrode, collapse pressing the cut and raised piece And the strength in the direction intersecting the blowing direction of the cut-and-raised pieces can be improved.

According to the ninth aspect of the present invention, a second cut-and-raised piece is formed in the folded-up piece portion of the eighth aspect, and a tip of the second cut-and-raised piece is cut and raised so as to face the folded-up piece portion. According to the tenth aspect of the present invention, a third cut-and-raised piece is formed at the base of the cut-and-raised piece, and the tip of the third cut-and-raised piece is band-shaped. Since it is made to abut on the surface of the cathode, the strength against crushing of the cut-and-raised piece is further increased, and the strength of the cut-and-raised piece provided along the blowing direction, particularly in the direction intersecting with the blowing direction, is further increased. Can be improved.

According to the eleventh aspect of the present invention, the cut-and-raised piece is cut and raised in both directions of the strip-shaped negative electrode, and according to the twelfth aspect of the present invention, the cut-and-raised piece is adjacent to the strip-shaped negative electrode. Since the cut-and-raised pieces are alternately cut and raised in both directions of the strip-shaped negative electrode, the accuracy of the interval of the air passage formed between the two electrodes is further stabilized, and the trapping performance is improved.

According to the thirteenth aspect of the present invention, the strip-shaped negative electrode is formed wider than the strip-shaped positive electrode, and the strip-shaped negative electrode is formed at both ends in the width direction of the strip-shaped negative electrode. Since the holes are formed, the feed holes required for the production of the strip-shaped negative electrode are formed at both ends in the width direction of the strip-shaped negative electrode, that is, in the non-electric field region where the collection is not performed. The feed hole can be formed without deteriorating performance.

According to the fourteenth aspect of the present invention, instead of the cut and raised piece, the strip contacts and is in contact with the positive electrode in the longitudinal direction.
A plurality of thin plate pieces standing in the air blowing direction are erected, and the curved front ends of the thin plate pieces are brought into contact with the belt-shaped positive electrode so as to keep the interval between the air passages constant. According to the invention described in Item 15, since the thin plate piece is formed integrally with the strip-shaped negative electrode, the pressure loss can be reduced, and the cut-and-raised piece is integrally formed with the strip-shaped negative electrode, or the strip-shaped negative electrode is formed. According to the sixteenth aspect of the present invention, since the thin plate is made of a metal material, the pressure loss can be reduced, and the strength of the thin plate can be improved. Can be

[Brief description of the drawings]

FIGS. 1A and 1B show a film-like electrode used in a first embodiment of the present invention, wherein FIG. 1A is a schematic plan view showing a state where the film-like electrode is housed in a housing, and FIG. 1B is an exploded perspective view of the film-like electrode. It is.

FIGS. 2A and 2B show the dust collecting electrode filter according to the first embodiment, wherein FIG. 2A is a front view, FIG. 2B is a side view, and FIG.

3A and 3B show a housing for accommodating the same film-like electrode, wherein FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a side view.

FIG. 4 is an exploded perspective view of the film-shaped electrode and the housing in the same.

FIG. 5 is a perspective view showing an embodiment of the cut and raised piece according to the embodiment.

FIG. 6 is a perspective view showing a modified example of the cut-and-raised piece of the above.

FIG. 7 shows another modified example of the cut-and-raised piece of the above, and (a)
Is a perspective view, and (b) is a cross-sectional view taken along line BB of (a).

FIG. 8 shows still another modified example of the cut-and-raised piece,
(A) is a perspective view, (b) is CC sectional view taken on the line of (a).

FIG. 9 shows still another modified example of the cut-and-raised piece of the above,
(A) is a perspective view, (b) is the DD sectional view taken on the line (a).

FIG. 10 is a perspective view showing still another modified example of the cut and raised piece of the above.

FIG. 11 is a perspective view showing still another modified example of the cut and raised piece of the above.

FIGS. 12A and 12B show still another modified example of the cut-and-raised piece, in which FIG. 12A is a perspective view and FIG. 12B is a sectional view taken along line EE of FIG.

13A and 13B show still another modified example of the cut-and-raised piece, in which FIG. 13A is a perspective view and FIG. 13B is a sectional view taken along line GG of FIG. 13A.

FIG. 14 is a perspective view showing still another modified example of the cut and raised piece of the above.

FIG. 15 is an exploded perspective view of a strip-shaped negative electrode and a strip-shaped positive electrode having still another modified example of the cut-and-raised piece.

FIG. 16 is an enlarged perspective view of the cut and raised piece of FIG.

17 (a) and 17 (b) show a strip-shaped negative electrode having a thin plate piece used in the second embodiment of the present invention. FIG. 17 (a) is a perspective view and FIG. 17 (b) is a sectional view.

18A and 18B show another modified example of the above-mentioned thin plate piece, wherein FIG. 18A is a perspective view and FIG. 18B is a sectional view.

FIG. 19 is a plan view showing a reference example of a dust collecting electrode.

20 is an exploded perspective view of the dust collecting electrode of FIG.

FIG. 21 is a schematic configuration diagram showing a conventional dust collecting electrode.

[Explanation of symbols]

16 Electrical insulation layer 17 Electrically conductive layer 18 Strip-shaped positive electrode 19 Strip-shaped negative electrode 20 Film-shaped electrode 50, 50 ', 50''Cut-and-raised piece 50a Part in contact with strip-shaped positive electrode 50b, 50c Both ends 50d Base 50e Bottom 51 Folded piece Part 52 Locking part 54 Thin plate piece 55 Projection 56 Reinforcement A A Blowing direction a Air passage b Cross direction

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-317748 (JP, A) JP-A-4-110055 (JP, A) JP-A-55-18264 (JP, A) JP-A-54-1979 108072 (JP, A) JP-A-5-146714 (JP, A) JP-A-3-80952 (JP, A) JP-A 62-187648 (JP, U) JP-A 49-137176 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B03C 3/00-3/88

Claims (16)

(57) [Claims] 1. An electric conductive layer comprising :
A film-shaped electrode is formed by laminating a band-shaped positive electrode covered with a band-shaped electric insulating layer wider than the conductive layer and a band-shaped negative electrode formed of the band-shaped electric conductive layer, and the film-shaped electrode is formed into a spiral shape. It is wound and arranged in the middle of the ventilation passage, an air passage is formed between the belt-shaped positive electrode and the band-shaped negative electrode, and a plurality of thin plate-shaped cut-and-raised pieces in contact with the band-shaped positive electrode are cut and raised in the band-shaped negative electrode. And a portion of the cut-and-raised piece in contact with the band-shaped positive electrode is formed in a curved surface, and the cut-and-raised piece holds an air passage between the two electrodes at a constant interval. . 2. The electrostatic precipitating filter according to claim 1 , wherein both ends of the cut-and-raised piece in the air blowing direction are cut from the strip-shaped negative electrode and cut off in a squeezing shape, respectively. 3. The cut-and-raised piece is cut off from the strip-shaped negative electrode at both ends in the air blowing direction, and
One end in the direction intersecting with the air blowing direction is cut off from the strip-shaped negative electrode , and this end is cut from a portion in contact with the strip-shaped positive electrode.
The part reaching the end is a folded piece that goes to the strip-shaped negative electrode side.
Electrostatic precipitator filter according to claim 1, characterized in that it is formed Te. 4. The cut-and-raised piece is viewed in a blowing direction.
2. The electrostatic precipitating filter according to claim 1, wherein said shape is cut and raised into a mountain shape or a ∧ shape . 5. The electrostatic precipitating filter according to claim 1, wherein the cut-and-raised piece has a small projection protruding from a portion in contact with the belt-shaped positive electrode. 6. The electrostatic precipitating filter according to claim 1, wherein a reinforcing member is provided on a skirt portion of the cut-and-raised piece rising from the strip-shaped negative electrode. 7. The electric dust filter according to claim 6, wherein the reinforcing member of the cut-and-raised piece extends from a skirt portion of the cut-and-raised piece to a portion in contact with the belt-shaped positive electrode. 8. Both ends of the cut-and-raised piece in the blowing direction are cut off from the strip-shaped negative electrode, and
One end in a direction intersecting with the air blowing direction is cut off from the strip-shaped negative electrode, and the end of a folded piece folded toward the strip-shaped negative electrode is locked by a locking portion provided on the strip-shaped negative electrode. The electric dust filter according to claim 1, wherein: 9. A cut-and-raised piece is cut and raised from a folded piece portion of the cut-and-raised piece toward the inside of the cut and raised piece, and a tip of the second cut and raised piece is cut to face the folded piece portion. The electric dust filter according to claim 1, wherein the filter is in contact with a base of the raising piece. 10. A third cut and raised piece is cut and raised from the base of the cut and raised piece toward the outside of the cut and raised piece, and the tip of the third cut and raised piece is brought into contact with the surface of the strip-shaped negative electrode. The electric dust filter according to claim 1, wherein: 11. The electric dust filter according to claim 1, wherein the cut-and-raised pieces are cut and raised in both directions of the strip-shaped negative electrode. 12. The electrostatic precipitating filter according to claim 1, wherein the cut-and-raised pieces are formed by alternately cutting and raising adjacent cut-and-raised pieces in both directions of the strip-shaped negative electrode. 13. The strip-shaped negative electrode is formed wider than the strip-shaped positive electrode, and a feed hole for forming cut-and-raised pieces is formed at both ends in the width direction of the strip-shaped negative electrode. The electric dust filter according to claim 1, wherein: 14. An electric conductive layer, comprising :
A film-shaped electrode is formed by laminating a band-shaped positive electrode covered with a band-shaped electric insulating layer wider than the air-conductive layer and a band-shaped negative electrode formed of the band-shaped electric conductive layer, and the film-shaped electrode is formed in a spiral shape. wound turn placed in the middle of the air passage, is between the strip positive electrode and the strip negative electrode is an air passage, the said strip negative electrode in contact with the strip positive electrode and the longitudinal direction of feed
A plurality of thin plate pieces corresponding to the wind direction are erected, and portions of the thin plate pieces that are in contact with the band-shaped positive electrode are formed in a curved surface, and the air passages between the two electrodes are held at a constant interval by each of the thin plate pieces. An electric dust filter characterized by the following. 15. The electrostatic precipitating filter according to claim 14, wherein said thin plate piece is formed integrally with a strip-shaped negative electrode. 16. The electrostatic precipitating filter according to claim 14, wherein said thin plate is made of a metal material.