JPH04310249A - Air conditioners and air purifiers equipped with electric air filters - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to equipment equipped with a thin and highly safe electric air filter.

0002

[Prior Art] In recent years, in order to create a comfortable environment, not only dedicated air purifiers but also air filters have been installed to remove cigarette smoke and dust that are released into the air. As various types of equipment are increasingly being used, there is an increasing demand for longer life and safety of air filters.

[0003] An air purifier equipped with a conventional electric air filter will be described below. As shown in FIG. 5, the dust in the air taken in by the blower 32 from the suction port 30 provided in the case 29 is collected by the ground electrode plate 36 made of iron or the like of the ionizer 35 and the high voltage wire 37 made of tungsten wire.
By passing through the electret material 34, which is itself charged among the electrostatic filter materials disposed in the dust collection filter 33, dust is removed by interference and Coulomb force, resulting in a clean Air was discharged from the discharge port 31 in the flow shown by the arrow. The air purifier is controlled by the control unit 28, and the high voltage power supply 27 is
A high voltage of kV is supplied to the high voltage line 26, and a ground potential is supplied to the ground electrode plate 36.

0004

[Problems to be Solved by the Invention] However, in the above-mentioned conventional configuration, the 6kV high voltage line is a bare wire, and there is a risk that people or objects will come into direct contact with the high voltage line through the inlet of the case during use, or that objects may leak electricity. At that time, there were problems such as secondary electric shock to people and destruction of equipment. Furthermore, since it is composed of an ionizer and a dust collection filter, it is difficult to realize a thin device, it is difficult to attach it to various devices, and it is expensive.

[0005] In order to avoid these problems, if only a dust collection filter using electret material is used,
The problem is that the life of the filter is short because the charge on the part to which the charged particles are attached is neutralized.

The present invention solves the above-mentioned conventional problems, and aims to provide equipment equipped with an electric air filter that is highly safe, does not cause damage to the installed equipment, is inexpensive, and has a long life. .

[0007]

[Means for Solving the Problems] In order to achieve this object, a device equipped with the electric air filter of the present invention includes a flat high voltage electrode provided with a large number of ventilation holes, and a high voltage electrode arranged parallel to the high voltage electrode. A flat low-voltage electrode with many ventilation holes,
A configuration in which the high voltage electrode of an electric air filter is provided on the blower side of the device, which includes an electrostatic filter material placed between a high voltage electrode and a low voltage electrode, and a high voltage power supply connected to the high voltage electrode and the low voltage electrode; , the high-voltage electrode of the electric air filter is arranged on the heat exchanger side of the air conditioner.

[0008]

[Operation] With this configuration, the high voltage electrode of the electric air filter is surrounded by earth potential, thereby increasing safety.

[0009]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, a flat plate with many ventilation holes 1 made of wire, wire mesh, or lath plate made of copper, aluminum, iron, etc., or a conductive net made of polypropylene resin mixed with carbon, etc. A low voltage electrode 4 is attached to the lid case 2 and electrically connected to the low voltage contact 8. A flat high voltage electrode 5 made of the same material as the low voltage electrode 4 and provided with a large number of ventilation holes is attached to the container case 3 in parallel with the low voltage electrode 4 and connected to the high voltage contact 7. Electret material itself is electrically charged, or dielectric filter material (made of nonwoven fabric made of polymers such as polyurethane, polyester, or urethane) has properties similar to those that polarize and become electrically charged when placed in an external electric field. ) is disposed between the low voltage electrode 4 and the high voltage electrode 5. This electrostatic filter material 6 is
Since the charge of the attached charged particles is transferred to the high-voltage power supply 10 through the electrode, the electric field is less likely to be relaxed and the life can be extended. When a blower 13 such as a cross flow fan or a sirocco fan blows air from the inlet 11 provided in the container case 3 to the outlet 12 as shown by the arrow, the electric air filter 14 is connected to the high voltage power supply 10 and the inlet The low voltage electrode 4 with earth potential is on the 11 side, and the DC 2.5 electrode is on the blower 13 side.
A high voltage electrode 5 with a potential of kV is arranged, and a blower 13
Since the conductive shielding material for noise suppression inside the frame part and container case 3 is at ground potential, the high-voltage electrode 5 is placed surrounded by ground potential, and when in use, it is not directly exposed to people from the inlet 11 or outlet 12. It is possible to eliminate the risk of objects or objects coming into contact with the high-voltage electrode 5, thereby increasing safety.

(Embodiment 2) A second embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 4, a blower 15 blows air from an inlet 17 provided in an air conditioner case 16 to an outlet 18 as shown by an arrow.
The electric air filter 19 has a high voltage electrode 21 disposed on the side of the heat exchanger 20 which is in the ventilation path and has a ground potential.
A low voltage electrode 22 which is at ground potential is arranged on the 7 side, and the high voltage electrode 21 has a safe structure surrounded by ground potential.
Moreover, it can be made suitable for a thin air conditioner.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 5, a pleated electret material 23 made of a nonwoven fabric such as polypropylene that is electrically charged is usually made by attaching small electret fibers 25 to a base net 24 made of the same material as the electret material. , which is pleated and has a lower pressure drop due to the increased air passage surface compared to non-pleated ones, and the conductive material that enters the flat low-voltage electrode (not shown) vertically through the inlet. The wires and the like overlap each other, making it difficult for them to pass through, thereby preventing short circuits and the like, further increasing safety.

[0012] Electret material 2 is used for the high voltage electrode and the low voltage electrode.
If No. 3 is used, manufacturing can be facilitated and costs can be reduced by cutting the electrode into a shape that matches the shape of each electrode and fixing it to the air filter case by ultrasonic welding, adhesive, or the like. In particular, carbon-containing resin electret materials are inexpensive in material cost and easy to handle.

[0013]

As is clear from the above description of the embodiments, the present invention provides a safe structure in which the high voltage electrode of the electric air filter is surrounded by earth potential by arranging the high voltage electrode on the blower side. Can be done. Furthermore, in air conditioners equipped with a heat exchanger, a thin electric air filter is required due to the space required for the equipment, but the present invention is suitable because the distance from the inlet to the electric air filter is short. Become. Further, by using pleated electret material as the electrostatic filter material, it is possible to improve the dust collection performance with low pressure loss, and to make it difficult for external objects to penetrate the electrostatic filter material.

The present invention makes it possible to realize equipment equipped with an excellent electric air filter having the above-mentioned effects.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of an air cleaner equipped with an electric air filter according to a first embodiment of the present invention.

[Fig. 2] Schematic front view of the electric air filter of the first embodiment

[Figure 3] A-A sectional view in Figure 2

FIG. 4 is a schematic cross-sectional view of an air conditioner equipped with an electric air filter according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram of the slope of the pleated electret material of the electric air filter according to the third embodiment of the present invention.

[Figure 6]
Cross-sectional diagram of an air purifier equipped with a conventional electric air filter

[Explanation of symbols]

4 Low voltage electrode 5 High voltage electrode 6 Electrostatic filter material 10 High voltage power supply 13　Blower

Claims (3)

[Claims] 1. A flat high-voltage electrode provided with a large number of ventilation holes; a flat low-voltage electrode provided with a large number of ventilation holes arranged parallel to the high-voltage electrode; and the high-voltage electrode and the low-voltage electrode. An electric air filter comprising an electrostatic filter material disposed between the two, and a high voltage power supply connected to the high voltage electrode and the low voltage electrode, the high voltage electrode of the electric air filter being disposed on the blower side of the device. equipment equipped with an electric air filter. 2. A device equipped with an electric air filter according to claim 1, wherein a high-voltage electrode of the electric air filter is disposed on the heat exchanger side of the air conditioner. 3. A device equipped with an electric air filter according to claim 1 or 2, wherein pleated electret material is used as the electrostatic filter material.