JPH09173900A - Structure of ionizing electrode for air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the extremely excellent structure of the ionizing electrode of an air cleaner capable of keeping highly stable and efficient dust collection operation of fine particles without generating an electron avalanche phenomenon at all and receiving specific restriction in the structure of a dust collecting electrode. SOLUTION: An ionizing electrode consists of a negatively charged needle electrode 2 and the dust collecting electrode 3 opposed to the needle electrode and having at least one air guiding and discharge hole passage 6 provided thereto along the tip direction of the needle electrode 2. The dust collecting electrode main body 3a is constituted of a positive electrode part 4 of which the surface opposed to the needle electrode 2 is charged positively and the dust collection part 5 integrated with the positive electrode part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention positively and efficiently utilizes electric wind and electrostatic attraction, which are electrochemical phenomena, to provide a more stable operation and a higher dust collection efficiency than before. The present invention relates to a structure of an ionization electrode for a gas cleaning device, which can improve the deodorizing efficiency and particularly the deodorizing efficiency.

[0002]

2. Description of the Related Art Conventionally, as a gas cleaning device using an ionization electrode, there is one disclosed in Japanese Patent Laid-Open No. 63-59963.

That is, as shown in FIG. 3, the gas purifying apparatus disclosed in the above-mentioned publication discloses a pair of positive and negative ionizing electrodes 11 and a ground 1.
And a platinum-impregnated honeycomb-shaped ceramic is used as the negative electrode 11a of the ionization electrode 11,
The positive electrode 11b has a configuration using a comb-shaped electrode.

The ionization electrode 11a having the above structure
When a high DC voltage 14 is applied to the pair of positive and negative ionization electrodes 11, the gas cleaning apparatus 13 having a corona discharge generates a corona discharge between the pair of positive and negative ionization electrodes 11, and the gas near the ionization electrodes 11 is ionized. It will be.

Further, the gas ionized as described above is:
Move as an ion stream toward the negative electrode 11a (arrow A)
Gas convection is induced via the ion flow,
In addition, a gas flow passes through the inside of the negative electrode 11a, and fine particles such as fine dust and odor contained in the gas flow are charged to positive electricity by the electric field of the positive electrode 11b. Then, the negative electrode 11a is attracted to the negative electrode 11a by the negative electric force.

Therefore, by repeating the above series, the gas containing fine particles such as fine dust and odor is filtered and discharged (arrow B) while passing through the negative electrode 11a to be cleaned. It will be.

[0007]

However, the gas cleaning device using the ionization electrode having the above-mentioned structure has the following problems.

That is, the ionization electrode 11 of the gas cleaning apparatus having the above-mentioned structure applies a negative voltage to the dust collecting electrode in order to adsorb fine particles such as fine dust and odor in the gas, and A positive voltage is applied to the electrodes for corona discharge for generating electric wind.

Therefore, a large amount of secondary electrons are emitted due to collision of ion particles, electrons and the like with the positive electrode for discharge having a high current density, so that a so-called avalanche phenomenon is likely to occur.

Therefore, the pair of positive and negative ionization electrodes 11 are provided.
In addition to the unstable corona discharge that occurs between them, spark discharge is likely to occur, making it difficult not only to increase the electric field strength of each electrode unit to improve dust collection efficiency, but also to be affected by electron flow and the like. Some of the fine particles are difficult to be adsorbed because the dust collecting electrode is applied with a negative voltage, and the dust collecting efficiency of the dust collecting electrode is also reduced.

Therefore, in order to improve the dust collection efficiency of the fine particles in the gas, it is necessary to reduce the size of the through hole 15 such as the honeycomb portion through which the gas flow of the dust collecting electrode passes. Therefore, when the ionization electrode 11 has the above-mentioned configuration, there is a very serious problem that it is difficult to maintain a highly stable and highly efficient dust collection operation due to various electrical and structural restrictions. It was happening.

Therefore, the present invention solves all of the above problems, and it is highly stable and high without causing any electron avalanche phenomenon and the structure of the electrode for collecting dust is not limited to a particular restriction. It is an object of the present invention to provide an extremely excellent structure of an ionization electrode of a gas purifying apparatus capable of maintaining an efficient fine particle collecting operation.

[0013]

That is, according to the present invention, a needle-shaped electrode 2 to which an ionization electrode is negatively applied, a needle-shaped electrode 2 that faces the needle-shaped electrode 2, and a tip direction of the needle-shaped electrode 2 is provided. And a dust collecting electrode 3 provided with at least one gas guiding and discharging hole 6, and the dust collecting electrode body 3a is positively applied to the surface facing the needle electrode 2. The needle-shaped electrode 2 and the dust collecting electrode body 3 have a structure composed of the electrode portion 4 and the dust collecting portion 5 integrated with the positive electrode portion 4.
the electron flow and the ion flow generated between a and the same direction,
Further, by using the needle-shaped electrode 2 on the electron emission side, which is the negative electrode, the current density at the tip can be sufficiently increased, so that not only a stable and strong electric field can be created, but also the stable, strong and wide area can be obtained. Depending on the electric field range, there is an advantage that dust, such as fine particles such as dust and odor, can be collected through the dust collecting electrode body 3a without using a special dust collecting filter or the like.

Further, the dust collecting electrode wooden body 3 having the above structure
When the facing area of the positive electrode portion 4 facing the needle electrode 2 of a is increased, it becomes possible to widen the receiving area of the electron flow and reduce the electron rush density, and thus the electron avalanche phenomenon does not occur. It has the advantage that a stable corona discharge can be maintained.

Further, since the dust collecting electrode main body 3a for attracting electric wind and adsorbing fine particles such as dust and odor is positively applied, fine particles such as dust and odor which are influenced by the electron flow. Will be more strongly adsorbed to the dust collecting electrode wooden body 3a. For example, when a zeolite, activated carbon or a dust collecting body containing the activated carbon is used in the dust collecting section 5, it has a particularly bad smell. It has an advantage that fine particles having a strong deodorization property can be deodorized more strongly through the chemical properties of the dust collector.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> An embodiment in which zeolite is used for the dust collecting portion and the dust collecting surface of the ionization electrode of the gas purifying apparatus of the present invention will be described below with reference to the drawings.

First, in FIG. 1, reference numeral 1 denotes a gas cleaning device formed in a substantially rectangular shape through a molding material such as synthetic resin, and 1a denotes a gas cleaning device main body.

Reference numeral 2 denotes a needle-like electrode which is provided in the vicinity of the gas inlet 1b formed in the main body 1a of the gas purifier and has a sharp tip and constitutes one of the ionization electrodes.

The needle-shaped electrode 2 is erected on a negative electrode surface body 9a which is negatively applied with a high voltage, and the negative electrode surface body 9a.
Is provided integrally on at least one side of a dust collecting surface body 9b formed of zeolite mainly composed of silicic acid and aluminum oxide, and furthermore, the negative electrode surface body 9a near the needle electrode 2 and the dust collecting surface body 9b. Each of the face bodies 9b is provided with a through-hole 10 for gas introduction penetrating therethrough to form a dust collection negative electrode 9.

Reference numeral 3 denotes the needle-shaped electrode 2, and four gas-guiding and discharging holes 6 are provided along the tip direction of the needle-shaped electrode 2, and the dust collecting member constituting the other of the ionization electrodes. The electrode for use is shown and is positioned in advance with a predetermined distance from the needle electrode 2 so as to have the best electric field range (arrow C) with the needle electrode 2.

Incidentally, the dust collecting electrode body 3 of the dust collecting electrode 3
a is integrally formed by a positive electrode portion 4 positively applied to the surface facing the needle-shaped electrode 2 and a dust collecting portion 5 made of the zeolite so as to have the positive electrode portion 4. Moreover, the positive electrode portion 4 and the dust collecting portion 5 are alternately and integrally joined to form the dust collecting electrode main body 3a, and
It is removably attached to the gas purifying apparatus main body 1a through a predetermined attaching means (not shown).

Numeral 8 is provided in the vicinity of the opening of the gas guide and discharge hole 6 of the dust collecting electrode body 3a which does not face the needle electrode 2, and through the gas guide and discharge hole 6 A positive electrode surface body that guides the discharged gas to a gas discharge port 1c provided at the upper end of the gas cleaning device 1 and is positively applied to the surface facing the gas guide / discharge hole 6 8a and a dust collecting surface body 8b formed of zeolite having the positive electrode surface body 8a, which are formed integrally with each other, and the gas discharged from each of the upper and lower two-stage gas guide / discharge hole paths 6 is 2 shows a dust collecting electrode plate for guiding exhaust gas, which is vertically inclined to be received separately and has an angle of about 45 degrees.

The gas purifying apparatus having the ionizing electrode according to the first embodiment of the present invention has the above-described structure. Next, the case of using the gas purifying apparatus having the ionizing electrode will be described.

First, as shown in FIG. 1, in the gas cleaning apparatus having the ionizing electrode having the above-mentioned structure, the needle electrode 2 constituting one of the ionizing electrodes is negatively applied and the dust collecting electrode body is also applied. 3a is integrally formed by a positive electrode part 4 positively applied to the surface facing the needle electrode 2 and a dust collecting part 5 made of zeolite having the positive electrode part 4. From the needle electrode 2 and the dust collecting electrode body 3
the electron flow and the ion flow generated between a and the same direction,
Further, by making the electron-emitting side, which is the negative electrode, the needle-shaped electrode 2, the current density at the tip can be sufficiently increased, so that not only a stable strong and wide electric field region can be created but also the stable strong and wide electric field can be obtained. Depending on the electric field range, it is possible to collect dust such as fine particles such as dust and odor through the dust collecting electrode body 3a without using any special dust collecting filter, and the dust collecting electrode. Even when the main body 3a is soiled with dust, the dust collecting electrode wooden body 3a is instantly removed from the gas purifier main body 1a to remove the dust, and the dust collector is attached again to the gas purifier main body 1a for repeated use. There is an advantage that can be done.

Further, by enlarging the area of the positive electrode portion 4 facing the needle-shaped electrode 2 of the dust collecting electrode body 3a, it is possible to widen the area for receiving the electron flow and lower the electron rush density. Therefore, there is an advantage that a stable corona discharge can be maintained without causing an electron avalanche phenomenon.

Further, since the dust collecting electrode main body 3a for attracting electric wind and adsorbing fine particles such as dust and odor is positively applied, dust, odor and the like which are influenced by the electron flow The fine particles are more strongly adsorbed on the dust collecting electrode body 3a, and particularly the odorous fine particles can be more strongly deodorized through the chemical property of zeolite.

In the above embodiment, the needle-shaped electrode is erected on the negative electrode surface body to which a high voltage is negatively applied, and the negative electrode surface body is made of zeolite mainly containing silicic acid and aluminum oxide. The negative electrode surface body and the dust collecting surface body, which are integrally provided on at least one surface side of the collected dust collecting surface body, and which penetrate each other through the negative electrode surface body and the dust collecting surface body. By constructing the dust collecting negative electrode by puncturing the holes, not only fine dust in the gas, but particularly odorous fine particles can be captured through the dust collecting face formed from zeolite, The elastic body is not necessarily limited to zeolite, and may be formed of activated carbon or a dust collector containing the activated carbon, and may be a rubber-like or foam-like elastic body containing the activated carbon. Contains carbon May be, but specific material, shape, thickness of the needle-like electrode is applied to the negative, distribution 設箇 plants, it is not limited in any way be the quantity or the like.

Further, in the above embodiment, the dust collecting electrode facing the needle electrode and provided with four gas guiding and discharging holes along the tip direction of the needle electrode, The dust collecting electrode body of the dust collecting electrode is preliminarily positioned with a predetermined distance from the needle electrode so as to have the best electric field range with the needle electrode. The positive electrode portion positively applied to the facing surface and the dust collecting portion having the positive electrode portion are integrally formed, and the positive electrode portion and the dust collecting portion are alternately and integrally joined. The needle cleaning device is detachably provided in the main body of the gas purifying device. However, as long as it can have the best electric field range with the needle electrode, for example, as shown in FIG. -Layer of positive electrode part positively applied to the surface facing the electrode and the dust collecting part having the positive electrode part The dust collecting electrode body may be formed and only one gas guide and discharge hole may be provided. Further, the gas guide and discharge hole is collected as shown in FIG. It may be a rectangular grid provided on the dust electrode body, and the shape, number, and location of the gas guiding and discharging holes in the dust collecting electrode body are by no means limited. As shown in FIG. 3C, a part 4a of the positive electrode 4 is provided along a guide through hole 7 formed in the dust collecting electrode body 3a,
It may be configured to be inserted into the dust collecting part 5, and in this case, a greater electrostatic effect can be obtained.
The dust collecting part does not necessarily have to be formed of zeolite, and may be formed of activated carbon or a dust collector containing the activated carbon, and the dust collecting part may be a rubber-like or foam-like substance containing activated carbon. Needless to say, it may be an elastic body and the presence or absence of carbon is not limited.

Further, in the above embodiment, the gas guide / discharge hole is provided near the opening of the gas guide / discharge hole of the dust collecting electrode body not facing the needle electrode. The exhausted gas can be guided to the gas exhaust port at the upper end portion of the dust collecting electrode body, and the positive electrode surface body and the positive electrode surface body are positively applied to the surface facing the through hole. The exhaust gas guiding dust collecting electrode plate integrally formed with the dust collecting surface made of zeolite is provided, but the dust collecting surface is activated carbon or a dust collecting body containing the activated carbon. Needless to say, the dust collecting surface may be a rubber-like or foam-like elastic body containing activated carbon, and the presence or absence of carbon is by no means limited. The dust electrode plate corresponds to each of the gas guide and discharge holes. The positive electrode face body and the dust collecting face body which compose the exhaust gas guiding dust collecting electrode plate may be alternately joined to form a plurality of layers. It goes without saying that the shape, the number of arrangement, and the presence or absence of inclination of the dust collecting electrode plate for use in the present invention are not limited, and the presence or absence of the dust collecting electrode plate for guiding the exhaust gas is not necessarily an essential requirement in the present invention. Yes.

However, the structure of the drive circuit which constitutes the gas cleaning apparatus having the ionization electrode according to the present invention, the device used, the type, the function, and the type of the power source for driving each circuit are also battery or rechargeable. Also, it is not limited to a specific type, material or shape of each electrode other than acicular electrodes, such as alternating current, direct current, etc., and not necessarily a solid such as a metal. For example, a liquid containing a conductive material may be used. Also, the bonding of the electrodes to the dust collecting portion or the dust collecting surface may be any of vapor deposition, baking, coating, etc., and other gas introduction ports and gas discharge ports provided in the gas cleaning device. The design of the location, the quantity, the shape, and the specific configuration of the gas purifier, etc., can be changed freely within the scope of the present invention.

[0031]

As described above, according to the present invention, an ionization electrode for a gas cleaning device is a negatively applied needle electrode, faces the needle electrode, and extends in the tip direction of the needle electrode. A positive electrode having a dust collecting electrode provided with at least one gas guiding and discharging hole along the same, and the dust collecting electrode body is positively applied to the surface facing the needle electrode. Since it has a structure composed of a portion and a dust collecting portion integrated with the positive electrode portion, the electron flow and the ion flow generated between the needle electrode and the dust collecting electrode body are the same. Direction, and by using a needle-shaped electrode on the electron emission side, which is the negative electrode, the current density at the tip can be sufficiently increased, so that not only a stable and powerful electric field can be created, but also the stable A strong and wide electric field area enables fine particles of dust, odor, etc. to be used without using any special dust collection filter. The dust collecting of equal through the dust collecting electrode body has an effect capable of collecting dust.

Further, when the dust collecting electrode main body is detachably attached to the gas cleaning device, even if the dust collecting electrode main body is contaminated with a dust collecting object, the dust collecting electrode main body is instantly Is removed from the main body of the gas purifying device to remove dusts, and then attached to the main body of the gas purifying device again to be used repeatedly.

Further, when the facing area of the positive electrode portion facing the needle electrode of the dust collecting electrode body having the above structure is increased, the receiving area of the electron flow can be widened to lower the electron rush density. Therefore, there is an effect that a stable corona discharge can be maintained without causing an electron avalanche phenomenon.

Further, since the dust collecting electrode body for attracting the electric wind and adsorbing the fine particles such as dust and odor is positively applied, the fine particles such as dust and odor affected by the electron flow are , Will be more strongly adsorbed to the dust collecting electrode body, for example, when using a zeolite, activated carbon or a dust collector containing the activated carbon in the dust collecting portion, particularly strong odor fine particles, It has the effect of being able to deodorize more strongly through the chemical properties of the dust collector.

Therefore, since the electron avalanche phenomenon is not caused at all, and the structure of the dust collecting electrode is not restricted by a particular condition, the highly stable and highly efficient dust collecting operation of fine particles can be maintained. In addition, it has a special effect that it is possible to provide an extremely excellent structure of the ionization electrode of the gas cleaning device, which can improve the dust collection efficiency by a more stable operation than before and can particularly improve the deodorization efficiency extremely. Came to.

[Brief description of the drawings]

FIG. 1 shows a gas cleaning device provided with an ionization electrode according to a first embodiment of the present invention, in which FIG.
The figure (b) is a cross-sectional view of the main part of the figure (a).

FIG. 2 shows another embodiment of the ionizing electrode of the present invention,
The figures (a) and (b) are perspective views, and the figure (c) is a sectional view.

FIG. 3 is a schematic explanatory view of a conventional gas cleaning device provided with an ionization electrode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Gas purifying device 1a ... Gas purifying device main body 2 ... Needle-shaped electrode 3 ... Dust collecting electrode 4 ... Positive electrode part 5 ... Dust collecting part 6 ... Gas guide and discharge hole 7 ... Guide through hole 8 ... Exhaust gas Guide dust collecting electrode 9 ... Negative dust collecting electrode

Claims (1)

[Claims] 1. A needle electrode (2) having a structure of an ionization electrode for a gas cleaning device, wherein the ionization electrode is negatively applied.
And facing the needle-shaped electrode (2), and the needle-shaped electrode (2)
A dust collecting electrode (3) provided with at least one gas guide and discharge hole (6) along the tip direction of
Moreover, the dust collecting electrode body (3a) is replaced by the needle electrode (2).
A positive electrode part (4) positively applied to the surface facing the positive electrode part and a dust collecting part (5) integrated with the positive electrode part (4). Structure of ionization electrode.