JP2004097263A - Air purifying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air purifying device which can easily generate an aerial discharge in a wide space, and also, in a vicinity of a catalyst. <P>SOLUTION: This air purifying device is equipped with paired electrodes 2 in an air passage 1a, generates discharge by applying a high voltage between the electrodes 2, and performs an air purification using the discharge. In the air purifying device, a fibrous dielectric member 3 is arranged between the electrodes 2, and air to be treated is made to pass therethrough. In this case, attention is paid to the fact that discharge is easily generated in a wide space by spatially arranging the dielectric member, and the dielectric member is formed into a fibrous member and is arranged in a space between the electrodes 2. Thus, a pressure loss is reduced, and in addition, discharge can be easily generated in the wide space. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to various indoor odors generated in a living environment, formaldehyde and volatile organic compounds (VOC) generated from building materials and furniture, and various odors generated in a vehicle cabin or flowing from outside air. The present invention relates to an air purification device for purifying gaseous pollutants contained in air such as exhaust gas, and more particularly, to a structure for using discharge energy effectively in a device using discharge energy.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is an air purification device that generates corona discharge or creeping discharge between electrodes, and decomposes and removes gaseous pollutants by the discharge energy. FIG. 2 is a schematic diagram showing a basic structure of a conventional air purification device using such discharge energy. In this device, a high voltage is applied between the electrodes 2 in the air passage 1a of the housing 1 to generate a discharge, and the excited plasma passes through the downstream catalyst 5 in the air flow to deodorize. I have.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned conventional method, there are problems that the energy of the discharge is not used efficiently and that the ozone generated by the discharge flows out into the air without being completely consumed. Even if the outflow of ozone does not reach the environmental standard, an increase in the concentration of ozone in the treated air has a bad effect on the human body. Therefore, in order to reduce the ozone concentration to a level that does not cause a problem, the energy of the discharge is reduced, but this is a contradictory problem that the deodorizing performance is reduced.
[0004]
The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an air purification device that can easily generate air discharge near a catalyst in a wide space. It is in.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the technical means described in claims 1 and 3 are adopted. That is, in the first aspect of the present invention, a pair of electrodes (2) is provided in the air passage (1a), a high voltage is applied between the electrodes (2) to generate a discharge, and the discharge is used. An air purifying apparatus for purifying air is characterized in that a fibrous dielectric member (3) is arranged between electrodes (2) to allow processing air to pass therethrough.
[0006]
This focuses on the fact that discharge is easily generated in a large space by spatially disposing the dielectric member. In the present invention, the dielectric material is disposed as a fibrous member in the space between the electrodes (2). I have. As a result, a low pressure loss can be achieved, and discharge can be easily generated in a wide space. In addition, it becomes easy to handle the product.
[0007]
The invention according to claim 2 is characterized in that the fibrous dielectric member (3) carries a catalyst that exhibits a catalytic action even at normal temperature and is activated by discharge energy. This is based on the idea of discharging directly to the catalyst portion, and the catalyst is carried on the fibrous dielectric member (3). As a result, the toxic gas and oxygen molecules are dissociated by the discharge energy in the vicinity of the catalyst, so that the gas can be effectively treated by the catalyst. In addition, by using a fibrous member, a wide catalyst surface area can be ensured.
[0008]
The invention according to claim 3 is characterized in that the electrode (2) is a porous metal net. Thereby, the air containing the gaseous pollutant can be circulated through the two electrodes (2) that are generating the electric discharge, and the two electrodes (2) can be efficiently purified. Note that the reference numerals in parentheses of the above means indicate the correspondence with specific means described in the embodiment described later.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a schematic diagram illustrating a basic structure of an air purification device according to an embodiment of the present invention, FIG. 1B is an enlarged schematic diagram of a purification unit, and FIG. 1C is a further enlarged schematic diagram of a fibrous dielectric. The charge distribution and discharge are schematically shown. This purifying section is disposed in the housing 1 having the air passage 1a inside. A pair of electrodes 2 is provided in the air passage 1a. A high voltage of several kV is applied between the electrodes 2 by a high voltage power supply 4 to generate a discharge, and an air purifying apparatus for purifying air using the discharge. It is.
[0010]
The electrodes 2 forming a pair are formed of a porous metal net such as a perforated metal or a metal mesh. The waveform of the high voltage applied for the discharge is a sawtooth wave, a pulse wave, a rectangular wave, an alternating current, and a pulsating flow. As a feature of this embodiment, the fibrous dielectric member 3 is arranged between the electrodes 2 to allow the processing air to pass therethrough, and at the same time, the fibers 3a of the fibrous dielectric member 3 exhibit a catalytic action even at normal temperature and discharge. The catalyst which is activated by the energy of is carried.
[0011]
The supported catalyst is a catalyst that exerts a catalytic action even at room temperature and is activated by the energy of discharge.Specifically, a mixture of manganese and titanium dioxide is used, but not limited thereto. Preferably, any one of iron (Fe), manganese (Mn), and aluminum (Al) oxides, and silver (Ag), cobalt (Co), and copper (Cu) with respect to iron (Fe) and manganese (Mn) A) a composite oxide combining any of aluminum (Al), nickel (Ni), and titanium (Ti), and a mixture of all of them mixed with titanium dioxide (TiO ₂ ) or gold (Au). May be used.
[0012]
The fibrous dielectric member 3 is formed of a material having a certain dielectric constant, such as barium titanate, strontium titanate, titanium dioxide, titania, etc., into a fibrous form, and the fibrous form is made of cotton, woven fabric, or nonwoven fabric. It is a substrate. Then, the fibrous dielectric member 3 as the base material is impregnated in a slurry obtained by mixing a catalyst of the above substance with a liquid, so that the catalyst is attached to each fiber 3a.
[0013]
When a high voltage is applied to the electrodes 2 via such a fibrous dielectric member 3, air discharge occurs in the entire space between the electrodes 2, and this discharge activates a nearby catalyst to oxidatively decompose odor components. . An example of the decomposition of acetaldehyde (CH ₃ CHO) is shown below as a typical reaction formula.
[0014]
Embedded image 2CH ₃ CHO + 5O ₂ → 4CO ₂ + 4H ₂ O
Next, features and effects of the present embodiment will be described. First, the fibrous dielectric member 3 is arranged between the electrodes 2 to allow the processing air to pass therethrough. This focuses on the fact that discharge is easily generated in a wide space by spatially disposing the dielectric member. In the present embodiment, the dielectric material is disposed as a fibrous member in the space between the electrodes 2. . As a result, a low pressure loss can be achieved, and discharge can be easily generated in a wide space. In addition, it becomes easy to handle the product.
[0015]
Further, the fibrous dielectric member 3 carries a catalyst that exhibits a catalytic action even at normal temperature and is activated by the energy of discharge. This is based on the idea that the catalyst portion is directly discharged, and a catalyst is carried on the fibrous dielectric member 3. As a result, the toxic gas and oxygen molecules are dissociated by the discharge energy in the vicinity of the catalyst, so that the gas can be effectively treated by the catalyst. In addition, by using a fibrous member, a wide catalyst surface area can be ensured.
[0016]
The electrode 2 is a porous metal net. Thus, the air containing the gaseous pollutant can be circulated through the two electrodes 2 that are generating the discharge, and the two electrodes 2 can be efficiently purified. The direction of the wind passing through the fibrous dielectric member 3 may be vertical or horizontal with respect to the surface of the electrode 2. Further, the electrode 2 and the fibrous dielectric member 3 may be in contact with each other or may be separated from each other.
[0017]
(Other embodiments)
In the above-described embodiment, the catalyst is supported on the fibrous dielectric member 3, but the catalyst may also be supported on the metal surfaces of the paired electrodes 2. In the above-described embodiment, since the basic configuration includes the electrode 2 and the fibrous dielectric member 3, a structure in which a plurality of pairs of electrodes 2 and a plurality of fibrous dielectric members 3 are naturally stacked may be employed.
[Brief description of the drawings]
1A is a schematic diagram showing a basic structure of an air purification device according to an embodiment of the present invention, FIG. 1B is an enlarged schematic diagram of a purification unit, and FIG. 1C is a further enlarged schematic diagram of a fibrous dielectric. It is a figure and shows a charge distribution and discharge schematically.
FIG. 2 is a schematic diagram illustrating a basic structure of a conventional air purification device.
[Explanation of symbols]
1a Air passage 2 Electrode 3 Fibrous dielectric member

Claims (3)

An air purifying apparatus comprising a pair of electrodes (2) in an air passage (1a), applying a high voltage between the electrodes (2) to generate a discharge, and purifying the air using the discharge.
An air purifying apparatus, wherein a fibrous dielectric member (3) is arranged between the electrodes (2) to allow processing air to pass therethrough. The air purification device according to claim 1, wherein the fibrous dielectric member (3) carries a catalyst that exhibits a catalytic action even at room temperature and is activated by discharge energy. The air purification device according to claim 1 or 2, wherein the electrode (2) is a porous metal net.

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