JPH07313903A - Collector of air purifier - Google Patents

Abstract

PURPOSE:To provide a collector capable of sufficiently collecting not only small dust particles but also large dust particles. CONSTITUTION:In the collector of an air purifier equipped with a collector plate electrode attracting charged dust, the collector plate electrode 22 is formed by providing a conductive material 25 to the surface of an insulating material 23 and coating the same with an insulating coating layer 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement for improving the dust collecting power of a collector in, for example, an automobile air cleaner.

[0002]

2. Description of the Related Art Generally, there is known an air cleaner for adsorbing dust charged by an ionizer to a collector plate electrode of a collector to collect the dust (for example, Japanese Patent Laid-Open No. 3-2).
70744). A conventional collector plate electrode of this type is formed by using a resin insulating film as a base material and applying a conductive material to one surface of the insulating film. The dust charged by the ionizer is first adsorbed to the electrode of the conductive material by the Coulomb attraction, and is strongly adsorbed by the intermolecular force between the dust and the electrode before the charge of the particles moves to the electrode.

[0003]

SUMMARY OF THE INVENTION In such an air cleaner, as in the case of cigarette smoke or conductive dust such as carbon (exhaust gas) or dust having a small capacitance,
When the particle size of the dust particles is small (for example, 0.3 μm), the charge of the particles is strongly adsorbed by the intermolecular force before moving to the electrode, so that a sufficient collecting force can be obtained.

However, when the particle size of dust particles such as pollen is large (for example, 20 μm), even if they are adsorbed by Coulomb attraction, the intermolecular force between the dust and the electrode works before they are adsorbed. However, since the charge of the particles moves to the electrode, there is a problem that the dust is re-scattered by the inertial force of the particles and cannot be sufficiently collected.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to sufficiently collect not only small dust particles but also large dust particles. To provide a collector.

[0006]

In order to achieve the above object, a first invention is a collector of an air cleaner provided with a collector plate electrode for adsorbing charged dust.
The collector plate electrode is characterized in that a conductive material is provided on the surface of the insulating material and the conductive material is covered with an insulating material coating layer.

In the second invention, the insulating material coating layer is 7
It is characterized by having a thickness of 0 to 150 μm.

According to a third aspect of the present invention, in the collector of an air cleaner provided with a collector plate electrode for adsorbing charged dust, the collector plate electrode is provided with a conductive material on the surface of an insulating material, and the conductive material has an insulating property. It is characterized by being formed by coating with an oil layer.

[0009]

According to the first invention, the conductive material on the surface of the insulating material is
Since the particles are coated with the insulating material coating layer, the presence of the insulating material coating layer slows down the transfer speed of the electric charge of the particles. Since the intermolecular force between the electrode and the electrode works to firmly adsorb the dust, re-scattering of dust is prevented. Therefore, the collection rate is improved.

According to the second invention, the insulating material coating layer has a thickness of 70 to 150 μm, so that the thickness is 70.
The collection rate of particles having a large particle size can be improved as compared with the case of less than or equal to μm, and the life of the insulating material coating layer can be improved as compared with the case of 150 μm or more in thickness.

According to the third invention, since the conductive material on the surface of the insulating material is covered with the oil layer, the moving speed of the charge of the particles becomes slower due to the existence of the oil layer. Therefore, the same as the first invention. So even if the particles have a large particle size,
While the Coulomb attractive force is present, the intermolecular force between the dust and the electrode works to firmly adsorb the dust, thereby preventing the dust from re-scattering. Therefore, the collection rate is improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes an electric dust collector type air purifier. The air purifier 1 collects the ionizer 3 for charging the dust 100 to, for example, a positive pole and the charged dust 100. And a collector 5 for doing so.

The ionizer 3 comprises, for example, a linear discharge electrode 13 connected to a high voltage power source 11 of 6 KV and a plate-shaped counter electrode 15 grounded to ground. The dust 100 is positively charged by corona discharge between both electrodes. To charge.

Reference numeral 17 denotes a wire mesh float electrode 17, for example. An ion current is applied to the float electrode 17 from the discharge electrode 13 of the ionizer 3, whereby a bias voltage is automatically generated at the float electrode 17. Naturally, the float electrode 17 is insulated from the high voltage power supply 11 and the ground.

The collector 5 comprises a positive collector plate electrode 21 connected to the float electrode 17 and a grounded negative collector plate electrode 22. The dust 100 charged to the positive pole is the grounded negative collector plate electrode. It is adsorbed and collected on the surface 22 by the Coulomb attractive force.

According to this, the air A containing the dust 100 sent to the air purifier 1 is in a state where only the dust 100 of the dust A is removed and becomes the purified air B, which is the air purifier 1. Sent out from.

According to this embodiment, however, the dust 10
It is characterized by the structure of the grounded collector plate electrode 22 for collecting 0.

As shown in FIG. 2, the collector plate electrode 22 is formed by using an insulating film 23 made of polypropylene or the like as a base material and first applying a conductive material 25 to one surface 23a of the insulating film 23. It

The layer of the conductive material 25 is formed by screen-printing a coating material containing carbon, metal or the like on one surface 23a of the insulating film 23, or by directly sputtering a metal on the surface.

Next, on the conductive material 25, an acrylic type,
For example, the paint made of resin material such as silicon is 70μ
It is applied to a thickness of m to 150 μm, and an insulating material coating layer 27 is formed thereon.

It has been found that by using this collector plate electrode 22, dust particles having a large particle size such as pollen can be sufficiently collected on the electrode surface.

To explain the mechanism, first, the dust 100 is attracted to the electrode of the conductive material 25 by the Coulomb attractive force. In the conventional case where the insulating material coating layer 27 does not exist, even if the particles are adsorbed by the Coulomb attractive force, the electric charge of the particles moves to the electrode before being adsorbed by the intermolecular force between the dust 100 and the electrode 25. The dust 100 is scattered again due to the inertial force of the particles.

According to this embodiment, however, the presence of the insulating coating layer 27 slows down the charge transfer speed of the particles, so that the molecules between the dust 100 and the electrode 25 are generated while the Coulomb attractive force is present. Since the force is exerted to firmly adsorb the dust 100, the dust 100 is prevented from re-scattering.

Further, according to this, since the insulating material coating layer 27 can be washed with water, the charge on the electrode surface can be removed and the dust 100 can be easily removed, which facilitates maintenance.

As shown in FIG. 3, when the thickness of the insulating material coating layer 27 becomes smaller than about 70 μm, the collection rate of dust particles having a large particle size such as pollen (Ishimatsuko) decreases. I found out that When the thickness of the insulating material coating layer 27 is about 70 μm, even if the dust particles have a large particle diameter, a collection rate of close to 80% can be secured.
For example, it has been found that when the insulating material coating layer 27 is not present, only a 40% collection rate can be obtained. Further, as shown in FIG. 4, it has been found that when the thickness exceeds approximately 150 μm, the life (time until the dust collection rate is reduced to 1/2 of the initial value) is significantly reduced. By the way, in this test, the coating layer 27 is formed of acrylic resin. When the thickness of the coating layer 27 is 150 μm, the life of the coating layer 27 is about 850 hours, and when the thickness is 260 μm, the life of the coating layer 27 is about It was 150 hours. Therefore, according to this, when the collection rate (FIG. 3) and the life (FIG. 4) are compared and weighed, the thickness of the insulating material coating layer 27 is 50 to 300 μm, preferably 70 to
It was found to be 150 μm.

FIG. 5 shows another embodiment.

According to this, the collector plate electrode 22
Using the insulating film 23 as a base material, the conductive material 25 is applied to one surface 23a of the insulating film 23, and then, for example, silicon-based oil is applied thereto to form the oil layer 3
It is formed by providing 1. This oil layer 3
No. 1 is not decomposed by O ₃ generated by the above-mentioned ionizer 3, and has a non-volatile property such that high viscosity can be maintained even at high temperature so that it does not flow out from the surface of the collector plate electrode even at high temperature. An oil layer is desirable.

According to this, since the moving speed of the electric charge of the particles becomes slower due to the existence of the oil layer 31, even if the dust particles have a large particle size, the dust 100 and the electrode can be discharged while the Coulomb attractive force is present. Since the intermolecular force between the particles 25 acts to strongly adsorb the particles, re-scattering of the dust 100 is prevented.

Although the present invention has been described based on the embodiment, it is obvious that the present invention is not limited to this.

For example, the present invention can be applied to a case in which a conductive material is applied to both surfaces of an insulating film, and in that case, the conductive material on both surfaces thereof is coated with an insulating material coating layer or an oil layer. Is desirable. Further, although the float electrode has been described in the above embodiments, the present invention can also be applied to an air cleaner having no float electrode. Further, although the present invention has been described with respect to the collector of the air purifier for automobiles, the present invention can be applied not only to the collector of an electric dust collector type domestic air purifier.

[0032]

As is apparent from the above description, the first to
According to the third aspect of the present invention, dust particles having a large particle size such as pollen can be efficiently collected.

Further, according to the second invention, since the insulating material coating layer has a thickness of 70 to 150 μm, the collection rate of particles having a large particle size is improved as compared with the case where the thickness is 70 μm or less. The thickness is 150μ
The life of the insulating material coating layer can be improved as compared with the case of m or more.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a collector of an air cleaner according to the present invention.

FIG. 2 is a cross-sectional view showing a configuration example of a collector plate electrode.

FIG. 3 is a diagram showing the relationship between the thickness of the coating layer and the collection rate.

FIG. 4 is a diagram showing the relationship between the thickness of the coating layer and the life.

FIG. 5 is a cross-sectional view showing another configuration example of a collector plate electrode.

[Explanation of symbols]

 1 Air Purifier 3 Ionizer 5 Collector 13 Discharge Electrode 15 Counter Electrode 17 Float Electrode 21 Collector Plate Electrode 22 Collector Plate Electrode 23 Insulating Film (Insulating Material) 25 Conductive Material 27 Insulating Material Coating Layer 31 Oil Layer 100 Dust

Claims (3)

[Claims] 1. A collector of an air cleaner having a collector plate electrode for adsorbing charged dust, wherein the collector plate electrode is provided with a conductive material on a surface of an insulating material, and the conductive material is covered with an insulating material coating layer. The collector of the air cleaner characterized by being formed by. 2. The insulating coating layer is 70-15
An air purifier collector according to claim 1, characterized in that it has a thickness of 0 μm. 3. A collector of an air cleaner having a collector plate electrode for adsorbing charged dust, wherein the collector plate electrode is provided with a conductive material on a surface of an insulating material, and the conductive material is formed by an oil layer having an insulating property. An air purifier collector characterized by being formed by coating.