JPH06154649A - Air filter - Google Patents

Abstract

PURPOSE:To provide an air filter which is safe and where a space in equipment is effectively utilized and the dust collecting performance of an electrostatic filter medium is improved and the long service life is aimed at. CONSTITUTION:The 1st low-voltage electrode 2 in the form of a flat plate where a lot of ventilation holes are made, the 2nd low-voltage electrode 3 opposite to the 1st low-voltage electrode 2 parallel to each where a lot of ventilation holes are made, a high-voltage electrode 4 installed between the 1st and 2nd low-voltage electrodes 2, 3 a lot of ventilation holes are made and electrostatic filter media 5 arranged between the 1st low-voltage electrode 2 and the high- voltage electrode 4 and between 2nd low-voltage electrode 3 and high-voltage electrode 4 are provided to constitute an air filter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter such as an air cleaner.

[0002]

2. Description of the Related Art In recent years, there has been an increasing tendency to demand a comfortable living environment, and the demand for air purifiers incorporating an air filter has increased and the performance thereof has been improved.

Regarding an air filter of a conventional air purifier or the like, Japanese Patent Laid-Open No. 3-154658 discloses a high voltage electrode of one of a pair of wire mesh electrodes to which a DC high voltage power source is applied, which sandwiches a charging filter. An air cleaner is disclosed which is provided so as to be exposed in one of the spaces on the suction port side or the air discharge port side. A conventional technique will be described below with reference to FIG.

The conventional air filter 31 has a flat plate-shaped high-voltage electrode 32 having a large number of ventilation holes, a flat-plate low-voltage electrode 33 having a large number of ventilation holes facing the high-voltage electrode 32 in parallel, and a high voltage. The high voltage electrode 32 and the low voltage electrode 33 are provided with an electrostatic filter material 34 disposed between the electrode 32 and the low voltage electrode 33.
A high voltage power supply 35 is connected between them. With this structure, an external electric field is applied to the electrostatic filter material 34, and the dust collection performance and the life of the electrostatic filter material 34 can be improved. Further, by disposing the high-voltage electrode 32 side on the blower 38 side that blows air to the discharge port 37 of the attached device 36 and the low-voltage electrode 33 side on the suction port 39 side, only the high-voltage electrode 32 is directly touched from the outside of the device 36. The number of cases was extremely small and the structure was designed to enhance safety.

[0005]

However, in the above-mentioned conventional structure, the high-voltage electrode 32 side is arranged on the blower 38 side of the device 36 to be mounted, so that the high-voltage electrode 32 is disposed.
Therefore, a certain space 40 is required for insulation between the electric conductor such as the blower 38 inside the device 36 and the electric conductor. That is, as a device having an air cleaning function, there is a problem that a constant space 40 having no air cleaning function is required inside.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an air filter which is safe, has a long life, and effectively utilizes the space inside the equipment.

[0007]

In order to achieve the above object, the air filter of the present invention comprises a flat plate-shaped first low-voltage electrode provided with a large number of ventilation holes and a first low-voltage electrode plate which is opposed to the first low-voltage electrode plate in parallel. A flat plate-shaped second low-voltage electrode having a large number of ventilation holes,
A flat plate-shaped high-voltage electrode provided with a large number of ventilation holes between the first and second low-voltage electrodes, and a space between the first low-voltage electrode and the high-voltage electrode and between a second low-voltage electrode and the high-voltage electrode. An electrostatic filter material is provided, and a high voltage power source is connected between the first low voltage electrode and the high voltage electrode and between the second low voltage electrode and the high voltage electrode.

[0008]

With the above structure, the first or second low-voltage electrode is arranged on the blower side of the equipment to which the air filter is attached, and the distance between the air filter and the conductive material such as the blower inside the equipment is reduced. Can be minimal.

[0009]

【Example】

(Embodiment 1) An air filter according to Embodiment 1 of the present invention will be described below with reference to FIG.

The air filter 1 is composed of a wire made of tungsten, copper, aluminum, iron or the like, a wire net, a lath plate or a conductive net made of polypropylene resin mixed with carbon, and the first and second low voltage electrodes 2. ，
3, high voltage electrode 4 made of the same material, electrostatic filter material 5, cases 6, 7 for attaching these electrodes 2, 3, 4
8 and contacts 9, 10 connected to the electrodes 2, 3, 4. Since the air filter 1 applies an external electric field to the electrostatic filter material 5, it is possible to improve the dust collecting performance and prolong the service life. Especially, when the electrostatic filter material 5 is processed into a pleated shape. In addition, the dust collection performance is high and the charge of the charged dust particles can be removed by the high voltage power source, so that the life can be extended.

(Embodiment 2) In FIG. 2, a device 22 to which an air filter 21 is attached is ventilated from a suction port 24 provided in the device 22 by a blower 23 such as a cross flow fan or a sirocco fan to a discharge port 25 as shown by an arrow. However, the air filter 1 holds the electrostatic filter material 29 in two spaces formed between the first low voltage electrode 26 and the high voltage electrode 27 and between the high voltage electrode 27 and the second low voltage electrode 28. That is, the first and second low-voltage electrodes 26 and 28 of earth potential are provided on the suction port 24 side and the discharge port 25 side, and the high-voltage electrode 27 of CD 2.5 kV potential is provided on the central portion, which are connected to the high-voltage power source 30. Therefore, it is possible to form a safe structure in which the high voltage electrode 27 is surrounded by the first and second low voltage electrodes 26 and 28 having the ground potential.

[0012]

As is apparent from the above description, in the air filter of the present invention, a flat plate-shaped first low-voltage electrode provided with a large number of ventilation holes and a large number of parallel-opposed first low-voltage electrodes. A flat plate-shaped second low-voltage electrode provided with a ventilation hole;
And a flat plate-shaped high-voltage electrode provided with a large number of ventilation holes between the low-voltage electrodes, and electrostatic filter materials arranged between the first low-voltage electrode and the high-voltage electrode and between the second low-voltage electrode and the high-voltage electrode. By providing the air filter, it is possible to minimize the distance between the air filter and the conductor such as the blower inside the device, the space inside the device to which the air filter is attached can be effectively used, and the electrostatic filter material can be used. Since an external electric field is applied, it is possible to improve the dust collection performance and extend the life of the electrostatic filter material.

[Brief description of drawings]

FIG. 1 is a sectional view of an air filter according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of an air cleaner of a second embodiment using the air filter of the first embodiment of the present invention.

FIG. 3 is a sectional view of an air cleaner using a conventional air filter.

[Explanation of symbols]

 1,21 Air filter 2,26 First low voltage electrode 3,28 Second low voltage electrode 4,27 High voltage electrode 5,29 Electrostatic filter material 30 High voltage power supply

Claims (1)

[Claims] 1. A flat-plate-shaped first low-voltage electrode having a large number of ventilation holes, and a flat-plate-shaped second low-voltage electrode having a large number of ventilation holes facing each other in parallel with the first low-voltage electrode. A flat plate-shaped high-voltage electrode having a large number of ventilation holes between the first and second low-voltage electrodes, between the first low-voltage electrode and the high-voltage electrode, and a second
An electrostatic filter material disposed between the low-voltage electrode and the high-voltage electrode, and between the first low-voltage electrode and the high-voltage electrode and the second low-voltage electrode.
Air filter with a high-voltage power supply connected between the low-voltage electrode and the high-voltage electrode.