JP3270981B2 - Dust collection electrode and air purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting electrode for an air purifier or the like for collecting dust by charging dust.

[0002]

2. Description of the Related Art Conventionally, this kind of dust collecting electrode has a structure as shown in FIG. That is, in FIG. 2, a first insulating thin film 12 is formed on one surface of a conductor 11 and a second insulating thin film 13 is formed on the other surface to form a first electrode 14, and a gap is formed with respect to the first electrode 14. The second electrode 15 was disposed via T to form a dust collecting electrode.

As the first insulating thin film 12 and the second insulating thin film 13, a polypropylene film, a polyester film, a polyvinyl chloride film or the like is used, respectively, and the thickness is generally 100 μm to 300 μm. On the other hand, a metal foil such as an aluminum foil is used as the conductor 11 and has a thickness of 10 μm to 100 μm.
m was common. In order to collect dust with the dust collecting electrode having such a configuration, a positive high voltage is applied to the conductor 11 of the first electrode 14 and the second electrode 15 is set to the ground potential.
Positively charged dust from one of the dust collection electrodes adheres to the surface of the second electrode 15 at the earth potential and is collected by the Coulomb force caused by the electric field when passing through the gap T.

Since a high positive voltage is applied between the conductor 11 of the first electrode 14 and the second electrode 15, an electric insulation is provided between the first conductor 11 and the second electrode 15. Performance is required.

For this reason, at the end 16 of the first insulating thin film 12 and the second insulating thin film 13, the first insulating thin film 1
Both the second insulating thin film 13 and the second insulating thin film 13 were heated to a high temperature and thermally fused, or were closely adhered by an adhesive.

[0006]

However, the conditions of heat fusion for maintaining the dielectric strength are difficult and it is difficult to achieve a sufficient adhesion state, and dielectric breakdown may occur at the end portion 16. Also, when the first and second insulating thin films 12 and 13 are brought into close contact with an adhesive, dielectric breakdown may occur at the end 16 when the amount of the applied adhesive is not uniform. . Therefore, the present invention provides a first electrode which has a small dielectric breakdown at the end portion in the related art and has good adhesion between the first and second insulating thin films and is difficult to be provided.
An object of the present invention is to provide a dust collecting electrode excellent in flammability .

[0007]

According to the dust collecting electrode of the present invention, a first insulating film is provided on both sides of a conductor , and
Electrode provided with a second insulating film outside the insulating film
And a second electrode provided with a gap between the first electrode and the first electrode.
A dust collecting electrode having the first electrode and the first electrode.
The first insulator provided on both surfaces of the conductor to be constituted.
Edge coating, this close contact at the end of the first electrode, a material of the flame-retardant in direct contact with the surface of the conductor and
In addition, the softening point is lower than that of the second insulating film, and the adhesive strength is lower.
A strong material is used .

[0008] The invention according to claim 2 is based on claim 1.
In addition to the invention according to the description, the insulating thin film that directly contacts the surface of the conductor in the first electrode is a flame-retardant insulating thin film.

[0009]

According to the above construction, the insulating thin film applied to the first electrode is adhered to each other at the end by the insulating thin films having a low softening point and a strong adhesive force, and has good adhesion performance.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 is a sectional view of a dust collecting electrode according to an embodiment of the present invention. In FIG. 1, 1 is a conductor made of an aluminum metal foil, 2 is a second electrode made of an aluminum metal foil, and 3 and 4 are outer insulating thin films made of a polypropylene film having a high dielectric strength and a thickness of 200 μm. Note that these 3 and 4 may be, for example, a polyester film other than the polypropylene film.

Next, reference numerals 5 and 6 respectively denote an inner insulating thin film which is directly bonded to the conductor 1, and which has a lower softening point than the outer insulating thin films 3 and 4 and has a strong adhesive force. The thickness of the film is 50 μm. The inner insulating thin films 5 and 6 are mutually fused at the end 7 by heat, and are in close contact with each other. Therefore , the conductor 1
The insulating thin film formed on both sides of the insulating thin film is a two-layer insulating thin film of an outer insulating thin film 3, 4 made of a polypropylene film and an inner insulating thin film 5, 6 made of an ethylene-ethyl-acrylate copolymer film. It is coated. Note that T is a space provided between the first electrode 8 and the second electrode 2 and air containing dust flows therethrough.
Also the in which the dust is adsorbed on.

In the above, the insulating thin films 5 and 6 made of an ethylene-ethyl-acrylate copolymer film have ends 7.
And a first electrode having excellent electrical insulation performance and withstand voltage performance.

In the embodiment of the present invention , the insulating thin film 5 is used instead of the ethylene-ethyl-acrylate copolymer film.
No. 6 uses a flame-retardant polyolefin-based plastics film , and as a first electrode, flame retardancy can be secured, and a flame-retardant dust collecting electrode can be realized.

[0015]

As described above, according to the present invention, the insulating thin films formed on both surfaces of the conductor each have an insulating thin film having a large dielectric strength and a softening point lower than that of the insulating thin film and have a large adhesive strength. Since it has a multiple configuration with an insulating thin film, the insulating films having a low softening point and strong adhesive strength adhere to each other to secure the adhesion at the end portion, and the electric insulation performance and the withstand voltage performance are improved.
Insulating thin films that are in direct contact with the conductor surface
Since a flame-retardant insulating thin film is used, a dust-collecting electrode having good flame retardancy can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a dust collecting electrode according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional dust collecting electrode.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Conductor 2 2nd electrode 3,4 Insulating thin film made of a polypropylene film 5,6 Insulating thin film made of an ethylene-ethyl-acrylate copolymer film 7 End 8 1st electrode T void

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B03C 3/00-3/88

Claims (2)

(57) [Claims] A first insulating film is provided on each side of a conductor.
And a second insulating film is provided outside the first insulating film.
A first electrode digits, a dust collecting electrode and a second electrode which is disposed to provide a gap between said first electrode, on both sides of the conductor constituting the first electrode Each given
The first insulating film adheres to the end of the first electrode and has a flame-retardant property that directly contacts the surface of the conductor .
A material having a softening point higher than that of the second insulating film.
Dust collection electrode using low adhesive material . 2. A first insulating film is provided on both sides of a conductor.
And a second insulating film is provided outside the first insulating film.
A gap is provided between the first electrode and the first electrode.
Having a dust collecting electrode having a second electrode
An air purifier, comprising: a conductive material forming the first electrode;
The first insulating film applied to both surfaces, respectively,
Close contact at the end of one electrode and directly on the surface of the conductor
A flame-retardant material that comes into contact with
Collection using materials with lower softening point and stronger adhesive force
Air cleaner with dust electrode.