JPH08319102A - Ozonizer - Google Patents

Abstract

PURPOSE: To provide an ozonizer of a simple structure capable of being efficiently cooled. CONSTITUTION: This ozonizer is provided by laying dielectric material plates 22 between a high-voltage electrode 20 which has a cross-sectional shape formed into a comb shape and to which a high AC voltage is applied and an earth electrode 21 to form an ozone generating electrode cell 23 and arranging an air path so as to form flow channels Ua and Va in a space between both the electrodes 20 and 21 of the ozone generating electrode cell 23 and the dielectric material plate 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone generator, and more particularly to an ozone generator for converting raw material air into ozone by electric discharge.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional example of an ozone generator.

As shown in the figure, a discharge electrode 2 made of an oxidation resistant metal having a comb-shaped cross section is pressed against one surface (upper surface in the drawing) of a ceramic plate 1, and the space between the adjacent discharge electrodes 2 is a raw material. It is erected so as to form a flow path R for air. An insulating metal oxide film 3a is formed on the other surface (lower surface) of the ceramic plate 1.
The counter electrode 3 made of metal is pressure-contacted via. A water cooling container 6 for containing cooling water is provided in the mating electrode 3, and an output end of an AC high voltage power source 4 is connected to both electrodes 2, 3. The ceramic plate 1, the discharge electrode 2, the mating electrode 3, the water cooling container 6 and the AC high voltage power supply 4 constitute an ozone generator.

When this ozone generator operates, an alternating high voltage is applied between the discharge electrode 2 and the counter electrode 3, and a mountain-shaped discharge field is generated at the tip of each discharge electrode 2. Owing to this discharge field, the oxygen in the raw material air flowing in the flow path R (in the direction perpendicular to the paper surface) is ozoned (Japanese Patent Publication No. 4-15162).
Issue).

FIG. 7 shows another conventional ozone generator.

The ozone generator shown in FIG.
A cylindrical ground electrode 8 is provided on the outer periphery of the electrode, a high voltage electrode 9 is provided in the longitudinal direction of the inner wall of the dielectric tube 7 (direction perpendicular to the paper surface), and an AC high voltage power supply 10 is connected to both electrodes 8 and 9. It is a thing.

When this ozone generator operates, a discharge field is generated between the dielectric tube 7 and the high-voltage electrode 9, and oxygen in the raw material air flowing in the flow path S (in the direction perpendicular to the paper surface) is ozonized. It

[0008]

However, since the ozone generator shown in FIG. 6 is cooled by using water, a waterproof structure is required and the structure becomes complicated.

The ozone generator shown in FIG. 7 does not need a waterproof structure because it is cooled using air.
Since the air volume is as small as 5 liters / minute and the electrodes and the dielectric cannot be cooled efficiently, nitrogen oxides may be generated when heat is generated.

Therefore, an object of the present invention is to solve the above problems and provide an ozone generator capable of efficiently cooling with a simple structure.

[0011]

In order to achieve the above object, the present invention provides a high-voltage electrode having a comb-shaped cross section to which an AC high voltage is applied, and a comb-shaped or ladder-shaped cross section. An ozone generating electrode cell is formed by interposing a dielectric plate between the earth electrode and the ground electrode, and the air between the electrodes of the ozone generating electrode cell and the dielectric plate forms a flow path. It is arranged in the passage.

Further, according to the present invention, a pair of ground electrodes having a comb-shaped cross section and grounded are arranged such that their teeth are opposed to each other, and a high dielectric constant plate is sandwiched between the ground electrodes. An ozone-generating electrode cell was formed with a high-voltage electrode to which is applied, and was arranged in the air passage so that the space between both electrodes of this ozone-generating electrode cell and the dielectric plate formed a flow path. It is a thing.

[0013]

According to the above structure, the earth electrode having a comb-shaped or ladder-shaped cross-section and the high-voltage electrode having a comb-shaped cross-section are arranged in the air passage, so that the ozone raw material can be obtained. The air, which is used as the air, passes not only between the high-voltage electrode and the dielectric plate, but also through the space between the ground electrode and the dielectric.Therefore, when a creeping discharge occurs between the dielectric electrodes and ozone is generated, heat is generated. However, the dielectric is cooled from both sides.

Further, by sandwiching the high-voltage electrode through the dielectric with the ground electrode having a comb-shaped cross section, the dielectric material is used when the air as a raw material passes through the space between the dielectric and the ground electrode. The body is cooled from both sides.

[0015]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a diagram showing an embodiment of the ozone generator of the present invention, and FIG. 2 is a sectional view of the ozone generating electrode cell shown in FIG.

As shown in FIGS. 1 and 2, a dielectric is provided between a high-voltage electrode 20 having a comb-shaped cross section and to which an AC high voltage is applied, and a ground electrode 21 having a comb-shaped cross section and grounded. An ozone generating electrode cell 23 is formed with a body plate (glass, ceramic, etc.) 22 interposed therebetween.

Two sets of ozone generating electrode cells 23 are housed in a case 24 having a square-shaped cross section, with the electrodes of the same type, for example, the high voltage electrode 20 being joined so as to face each other.
It is pressure-welded with the pressure-bonding bolt 25. A wire mesh 26 for safety is provided on the front surface and the rear surface of the case 24.
Both electrodes 20 and 21 are made of, for example, aluminum, but it goes without saying that another metal may be used as long as it is an oxidation resistant metal such as titanium.

An AC high voltage power supply 27 is provided on both electrodes 20 and 21.
Are connected so that air flows in a direction perpendicular to the paper surface.

Next, the operation of the embodiment will be described.

When an AC high voltage is applied between the high voltage electrode 20 and the ground electrode 21, each of which has a comb-shaped cross section, the dielectric plate 22 between the high voltage electrode 20 and the ground electrode 21 is applied. A creeping discharge is generated on the surface to oxidize oxygen in the air to generate ozone and generate heat. However, since the air, which is a raw material for ozone, passes through the flow paths Ua and Va of both electrodes, the dielectric plate 22 is removed from both sides. Efficiently cooled.

Here, the interval P between the teeth of both electrodes 20 is about 5
mm, the length L is about 10 mm, the thickness t is about 1.2 mm, the voltage of the AC high-voltage power supply 27 is 4 to 5 KV, and the frequency is about 10.
The generation concentration of ozone was 10 to 30 ppm at KHz, but the numerical value is not limited.

In the ozone generator shown in the figure, since the size of the dielectric plate 22 is larger than that of the ground electrode 21 and the high voltage electrode 20, the ground electrode 21 and the dielectric plate 22 are included.
In addition, the creepage distance between the high voltage electrode 20 and the ground electrode 21 is longer than that in the case where the high voltage electrodes 20 have the same size, and the dielectric breakdown of the dielectric plate 22 due to the creeping discharge is prevented, and the long life and high reliability are achieved. Sex is obtained.

FIG. 3 is a diagram showing a modification of the ozone generating electrode cell, and FIG. 4 is a stack of ozone generating electrode cells in which the ozone generating electrode cell shown in FIG. 2 and the ozone generating electrode cell shown in FIG. 3 are combined. It is a body (hereinafter referred to as a “laminated body”).

As shown in FIG. 3, an ozone generating electrode cell 28
In this example, a dielectric plate 31 is interposed between a ground electrode 29 having a ladder-shaped cross section and a high voltage electrode 30 having a comb-shaped cross section.

In the laminate 32 shown in FIG. 4, ozone generating electrode cells 23 and 28 are laminated so that electrodes of the same kind contact each other. However, the earth electrode 29 of the ozone generating electrode cell 28 is a common earth electrode of the two ozone generating electrode cells 28.

The high voltage electrode 20 of such a laminate 32,
Even when an AC high voltage is applied between the electrode 30 and the ground electrodes 21 and 29, each electrode 20, 2 is also applied as in the embodiment shown in FIG.
Channels Ua, Va, Ub, V formed in 1, 29, 30
When air passes through the inside of b, ozone is generated by creeping discharge and the air cools the dielectric plates 22 and 31 from both sides.

FIG. 5 is a diagram showing another embodiment of the ozone generator of the present invention.

As shown in the figure, a pair of ground electrodes 33a, 33b, each having a comb-shaped cross section and grounded, are arranged so that their tooth portions face each other.
An ozone generating electrode cell 36 is formed between 3b with a high voltage electrode 35 interposed between a pair of dielectric plates 34a and 34b and to which an AC high voltage is applied. Reference numeral 37 is an AC high voltage power source.

A plurality of such ozone generating electrode cells 36 are laminated in layers, and the earth electrodes 33a and 33b and the dielectric plate 34a,
34b is arranged in the air passage so that a space formed between the ground electrodes 33a, 3b and 34b forms flow paths Wa, Wb.
By applying an alternating high voltage between 3b and the high-voltage electrode 35, the air that is the raw material of ozone is ozone-generated by the creeping discharge, and the dielectric plates 34a and 34b are cooled from both sides.

Since both sides of the ozone generating electrode cell 36 shown in the figure are ground electrodes 33a and 33b, it is possible to distinguish between the ground electrode and the high voltage electrode as in the ozone generating electrode cell shown in FIG. It is possible to carry out multi-stage lamination as it is without carrying out.

As described above, according to the present embodiment, electrodes having a comb-shaped or ladder-shaped cross section are arranged in the air passage, and an AC high voltage is applied between both electrodes, so that the ozone raw material can be obtained. Both of the electrodes are cooled by the air that becomes, and at the same time, ozone is formed by the creeping discharge generated between the high voltage electrode and the dielectric plate.

Needless to say, the number of teeth of both electrodes and the number of stacked layers are not limited to those shown in the figure.

[0034]

In summary, according to the present invention, the following excellent effects are exhibited.

Using a high voltage electrode formed in a comb shape, a ground electrode formed in a comb shape or a ladder shape, and a dielectric plate,
By disposing the flow path formed between both electrodes and the dielectric in the air passage, it is possible to efficiently cool with a simple structure.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an ozone generator of the present invention.

FIG. 2 is a sectional view of the ozone generating electrode cell shown in FIG.

FIG. 3 is a diagram showing a modified example of an ozone generating electrode cell.

4 is a laminated body in which the ozone generating electrode cell shown in FIG. 2 and the ozone generating electrode cell shown in FIG. 3 are combined.

FIG. 5 is a diagram showing another embodiment of the ozone generator of the present invention.

FIG. 6 is a conventional example of an ozone generator.

FIG. 7 is another conventional example of an ozone generator.

[Explanation of symbols]

 20 High Voltage Electrode (Electrode) 21 Earth Electrode (Electrode) 22 Dielectric Plate 23 Ozone Generating Electrode Cell 27 AC High Voltage Power Supply Ua, Va Flow Path

Front page continued (72) Inventor Kazuhiro Shitara 3-1-15-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Toji Technical Center (72) Inventor Shuichi Kawate 1-1-1 Ishishiba, Matsumoto-shi, Nagano Prefecture No. Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory (72) Inventor Yasuo Nakamura 1-1-1 Ishishiba, Matsumoto City, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory

Claims (2)

[Claims] 1. A dielectric plate is interposed between a high-voltage electrode having a comb-shaped cross section and to which an AC high voltage is applied, and a ground electrode having a comb-shaped or ladder-shaped cross section and grounded. An ozone generating device is characterized in that an ozone generating electrode cell is formed by using the ozone generating electrode cell, and the ozone generating electrode cell is arranged in an air passage so that a space between the electrode and the dielectric plate forms a flow path. 2. A pair of ground electrodes, each having a comb-shaped cross section and grounded, are arranged such that the tooth portions face each other,
An ozone generating electrode cell is formed by interposing a high voltage electrode, which is sandwiched between both ground electrodes with a dielectric plate and to which a high AC voltage is applied, between the two electrodes of this ozone generating electrode cell and the dielectric plate. An ozone generator, wherein the space is arranged in an air passage so as to form a flow path.