JPH1143312A - Ozone generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozone generator capable of compensating corrosion of high pressure electrodes due to ozone and inexpensively and readily producing and making installation space small. SOLUTION: One ends of a discharge tube 12 having closed one end and a discharge tube 13 having opened both end are engaged into stepped parts 11a of a ring-like connecting tool 11 having stepped parts 11a on both sides to form a discharge tube component 14 having closed one end and the discharge tube component 14 is supported through a spacer to the internal circumference of the grounding electrode 2 and raw material gas is made to flow into discharge space between the discharge tubes 12 and 13 and grounding electrode 2 to produce ozone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an ozone generator.

[0002]

2. Description of the Related Art FIG. 11 is a longitudinal sectional front view of a conventional ozone generator, 1 is a cylindrical container, 2 is a stainless steel provided on the inner periphery of the container 1 via a pair of partition walls (or spacers) 3. A ground electrode 4 formed of a tube is a discharge tube formed of a glass tube whose one end is closed, and a high-voltage electrode 5 is provided on the inner periphery thereof. The discharge tube 4 is supported on the inner periphery of the ground electrode 2 via a spacer 6. Reference numeral 7 denotes a high-voltage AC power supply,
And the high voltage electrode 5 via a brushed conductor 9.

In the above configuration, a high-voltage alternating current is applied to the high-voltage electrode 5, the ground electrode 2 is grounded, and a silent discharge is generated in a discharge space between the discharge tube 4 and the ground electrode 2 as shown by an arrow. An ozone generating raw material gas O ₂ such as dry air or oxygen gas is passed through the discharge space from the left side of the drawing to obtain ozone O _3.
Is generated and derived from the right side. Further, cooling water flows between the partition walls 3 inside and outside the container 1.

Since the amount of ozone generated per discharge tube 4 is determined, the required amount of generated ozone can be obtained by placing the discharge tube 4 in the vessel 1 as shown in FIGS. 12 (a) and 12 (b). 4 are arranged in parallel, but in the case of a large-capacity ozone generator, a plurality of ground electrodes 1 arranged in parallel are connected in series to form one ground electrode 2. In this case, there are two methods. One is to insert and dispose a pair of discharge tubes 4 from both ends of the ground electrode 2 with their closed ends facing each other as shown in FIG. The source gas flows into the discharge space between the discharge tube 2 and each discharge tube 4 from one end of the ground electrode 2 and ozone flows out from the other end. This is called a series type. The other is that the two ground electrodes 2 are connected via a pipe 10 as shown in FIG. 14, and an ozone outlet 10a is provided in the pipe 10 so that the raw material gas is supplied to each ground electrode 2 as shown by an arrow. The ozone flows out from the end on the connection side and ozone is taken out from the ozone outlet 10a, which is called a facing type.

[0005] However, in the opposed type, the pipe 1 is located at the center.
Since 0 is required, the installation space becomes large, and since the raw material gas flows from both sides, the amount of the raw material gas flowing from both sides becomes unbalanced, and the ozone generation efficiency also decreases. Therefore, when increasing the capacity, the ground electrode 2 having a long length is used as shown in FIG.

[0006]

However, in the case of the ozone generator having the structure shown in FIG. 13, there is a problem that the high-voltage electrode 5 provided on the inner periphery of the discharge tube 4 on the ozone outflow side is corroded by ozone. . That is, the high-voltage electrode 5 is formed by spraying aluminum on the inner periphery of the discharge tube 4. When the high-voltage electrode 5 in the form of a film comes into contact with ozone, the film is peeled off due to corrosion. Becomes more serious as the concentration increases. As a solution to this problem, it is conceivable to form the high-voltage electrode 5 by sputtering stainless steel having higher durability than aluminum, but there is a problem that it becomes expensive. It has also been considered that the length of the discharge tube 4 is increased to increase the effective discharge area per one discharge tube. However, the discharge tube 4 is generally made of glass, and the long discharge tube 4 is difficult to manufacture. Production was difficult and mass production was not possible. In addition, since the discharge tube 4 which is closed at one end is disposed to face, there is a problem that an unnecessary space other than the effective discharge area is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can compensate for a decrease in the discharge area of a high-voltage electrode due to ozone, and is inexpensive, easy to manufacture, and requires little space. It is an object of the present invention to obtain an ozone generator capable of performing the following.

[0008]

According to a first aspect of the present invention, there is provided an ozone generating apparatus, wherein the inner periphery of each discharge tube is fitted to the step of a connector having a ring shape and having steps on both sides so as to be closed at one end. Is formed, and a raw material gas is caused to flow through a discharge space between each discharge tube and a ground electrode to generate ozone.

According to a second aspect of the present invention, there is provided an ozone generating apparatus, wherein the inner periphery of each discharge tube is fitted to a step of a ring-shaped connector having steps on both sides to form a discharge tube component having one end closed. The outer periphery of the connector is fitted with the ground electrode, and a gas flow section is provided between the step and the outer periphery of the connector, and the source gas flows into the discharge space between the discharge tube and the ground electrode to generate ozone. It is to let.

According to a third aspect of the present invention, in the ozone generator, the outer circumference of each discharge tube is fitted to a ring-shaped connecting member to form a discharge tube component having one end closed, and the discharge between each discharge tube and the ground electrode is formed. The material gas flows through the space to generate ozone.

In the ozone generator according to a fourth aspect of the present invention, the outer periphery of each discharge tube is fitted to a ring-shaped connecting member to form a discharge tube component which is closed at one end, and the outer periphery of the connecting device is fitted to a ground electrode. In addition, a gas flow portion is provided, and the raw material gas flows through a discharge space between the discharge tube and the ground electrode to generate ozone.

According to a fifth aspect of the present invention, in the ozone generator, the high-voltage electrodes of the respective discharge tubes are connected via a conductor having a pair of leaf spring portions which are expanded at both ends.

According to a sixth aspect of the present invention, in the ozone generator, the high voltage electrodes of the respective discharge tubes are connected via conductors having brush portions at both ends.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a main part of an ozone generator according to Embodiment 1, and FIGS. 2A and 2B are a side view and a front view of a connector. Reference numeral 11 denotes a ring-shaped connecting tool, which has stepped portions 11a on both sides to be fitted to the inner circumferences of the discharge tubes 12, 13. The discharge tube 12 is closed at one end and the discharge tube 13 is open at both ends, and the high-voltage electrode 5 is formed on the inner periphery of each of them. Then, the non-closed end side of the discharge tube 12 is fitted to the one step portion 11a, and one end of the discharge tube 13 is fitted to the other step portion 11a to form the discharge tube component 14 which is closed at one end. The outer circumference of the connector 11 has the same diameter as the outer circumferences of the discharge tubes 12 and 13, and the discharge tube component 14 is supported on the inner circumference of the ground electrode 2 via the spacer 6.

By the way, since the discharge tubes 12 and 13 are separate bodies, the high voltage electrodes 5 provided on the respective inner circumferences are also separate bodies and must be connected to the high voltage power supply 7.
Therefore, as shown in FIG. 3, a conductor 15 having a pair of leaf spring portions 15a expanded at both ends is prepared, and this conductor 15 is inserted into the discharge tubes 12 and 13, and the leaf spring portion 15a is And contact by spring pressure. The distance between the distal ends of the pair of expanded leaf spring portions 15a is larger than the inner diameters of the discharge tubes 12 and 13. The high-voltage electrode 5 of the discharge tube 13 on the source gas inflow side is connected to the high-voltage power supply 7 via the conductor 8 and the brushed conductor 9. Thereby, each high-voltage electrode 5 is connected to the high-voltage power supply 7.

In the above configuration, the ground electrode 2 and the discharge tube 1
The raw material gas is fed into the discharge space between the discharge space 2 and 13 as indicated by an arrow, and ozone is generated and transmitted as indicated by an arrow. The connector 11 does not hinder the flow of gas.

In the first embodiment, a plurality of discharge tubes 1
2 and 13 are connected by the connector 11, and corrosion of the high voltage electrode 5 due to ozone can be compensated by increasing the discharge area. In addition, stainless steel sputtering is not required, so that the cost is low, and it is not necessary to lengthen one discharge tube, so that it is easy to manufacture.
Since the closed ends 2 and 13 are not arranged opposite to each other, unnecessary space other than discharge can be reduced. Further, since the high voltage electrodes 5 are connected to each other by the conductors 15 having the leaf spring portions 15a at both ends, electrical connection is facilitated, and stable ozone generation can be performed without partial discharge or concentrated discharge.

Embodiment 2 FIG. 4 is a longitudinal sectional view of a main part of an ozone generator according to Embodiment 2, and FIGS. 5 (a) and 5 (b) are a side view and a front view of the connecting device, and 16 is a ring-shaped member. Discharge tube having a stepped portion 16a on both sides fitted to the inner circumferences of discharge tubes 12, 13 and fitted with one end of discharge tubes 12, 13 to this stepped portion 16a. Form component 17. Connector 16
Is fitted with the inner periphery of the ground electrode 2, and a plurality of gas flow portions 16b are formed by cutting from the outer periphery.
The high voltage electrodes 5 are electrically connected to each other by a conductor 15 having a pair of leaf spring portions 15a at both ends.

In the above configuration, the source gas is the ground electrode 2
Ozone is generated and flows out through the discharge space between the discharge tubes 12 and 13 and the gas flow portion 16b of the connector 16. Ozone also passes through the gas flow section 16b.

The second embodiment has the same effect as the first embodiment, and the connecting member 16 also serves as a spacer, so that the spacer 6 can be reduced or eliminated.

Embodiment 3 FIG. 6 is a longitudinal sectional view of a main part of an ozone generator according to Embodiment 3, and FIG.
Reference numeral 8 denotes a ring-shaped connecting tool fitted to the outer circumferences of the discharge tubes 12 and 13. One end of the discharge tubes 12 and 13 is fitted to the connecting tool 18 to form a discharge tube component 19 having one end closed. The outer periphery of the connector 18 projects to about half of the discharge space. Other configurations and effects are the same as those of the first embodiment. In addition, since the connection tool 18 may be simply formed in a cylindrical shape, manufacture is easy.

Embodiment 4 FIG. 8 is a longitudinal sectional view of an ozone generator according to Embodiment 4, FIGS. 9 (a) and 9 (b) show side and front views of the same connector, and 20 is discharge tubes 12 and 13. Is a ring-shaped connecting tool which is fitted to the outer periphery of the discharge tubes 12 and 13.
Are fitted to each other to form a discharge tube component 21 with one end closed. The outer periphery of the connector 20 is fitted with the inner periphery of the ground electrode 2, and a plurality of gas flow portions 20 a
Is formed. Other configurations are the same as those of the above embodiments.

In the above configuration, the source gas and ozone are passed through the gas flow section 20a. The effect is the same as that of the second embodiment, and the connector 20 does not need to be provided with a step, so that the manufacture is easy.

Fifth Embodiment FIG. 10 is a schematic front view of a conductor 22 having brush portions 22a at both ends in an ozone generator according to a fifth embodiment. The conductor 22 can be used instead of the conductor 15 shown in FIG. . In this case, each brush portion 22a contacts each high voltage electrode 5 with pressure, and electrically connects each high voltage electrode 5. Since the high-voltage electrodes 5 on the source gas inflow side are connected to the high-voltage power supply 7 through the conductors 9 with brushes, all the high-voltage electrodes 5 are connected to the high-voltage power supply 7. Accordingly, electrical connection between the high-voltage electrodes 5 is facilitated, partial discharge and concentrated discharge are eliminated, and stable ozone generation can be performed.

In each of the above-described embodiments, two discharge tubes 1 are connected by using one connection tool 11, 16, 18, and 20.
2 and 13 were connected, but two or more connectors 11, 16,
Three or more discharge tubes 12, 13 (however, only one discharge tube 12) may be connected by using 18, 20. In this case, the effect can be further enhanced.
In addition, it is necessary to slightly change the inner diameter and the outer diameter of each of the connecting tools 11, 16, 18, and 20 depending on the dimensional tolerance of the ground electrode 2 and the discharge tubes 12 and 13. However, the fluorine resin having elasticity and excellent ozone resistance is required. By using the above, it is possible to cope with the dimensional tolerance as described above.

[0026]

As described above, according to the first aspect of the present invention, a plurality of discharge tubes are connected by the connector, and the corrosion of the high-voltage electrode due to ozone can be compensated for by increasing the discharge area. In addition, since stainless steel is not required for sputtering, it is inexpensive, and it is not necessary to lengthen one discharge tube, so that it is easy to manufacture. In addition, since the closed end of the discharge tube is not arranged to face the space, the space can be reduced.

According to the second aspect, the same effects as those of the first aspect are obtained, and since the connecting tool is fitted to the inner periphery of the ground electrode, it also serves as a spacer, so that the spacer is reduced or eliminated. Can be.

The third aspect has the same effect as that of the first aspect, and since no step is provided, the manufacture becomes easy.

According to the fourth aspect, the same effects as those of the second aspect are obtained, and since the connecting tool has no stepped portion, it can be easily manufactured.

According to the fifth and sixth aspects, since the high voltage electrodes are connected via the conductor having the leaf spring portions or the brush portions expanded at both ends, this connection is easily and reliably performed, and stable ozone generation is achieved. It can be carried out.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part of an ozone generator according to Embodiment 1 of the present invention.

2A and 2B are a side view and a front view of the connecting device according to the first embodiment.

3A and 3B are a front view and a plan view of a conductor having a leaf spring portion at both ends according to the first embodiment.

FIG. 4 is a vertical sectional view of a main part of an ozone generator according to a second embodiment.

5A and 5B are a side view and a front view of a connection device according to a second embodiment.

FIG. 6 is a vertical sectional view of a main part of an ozone generator according to a third embodiment.

FIG. 7 is a side view and a front view of a connection tool according to a third embodiment.

FIG. 8 is a longitudinal sectional view of a main part of an ozone generator according to a fourth embodiment.

FIG. 9 is a side view and a front view of a connection tool according to a fourth embodiment.

FIG. 10 is a schematic front view of a conductor having brush portions at both ends according to a fifth embodiment.

FIG. 11 is a longitudinal sectional view of a conventional device.

FIG. 12 is a side view and a front view of a conventional ozone generator using a plurality of discharge tubes.

FIG. 13 is a vertical sectional view of a main part of an ozone generator when conventional discharge tubes are arranged in series.

FIG. 14 is a longitudinal sectional view of a main part of an ozone generator when conventional discharge tubes are arranged in series.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container 2 ... Ground electrode 5 ... High voltage electrode 6 ... Spacer 7 ... High voltage power supply 8, 15, 22 ... Conductor 9 ... Conductor with brush 11, 16, 18, 20 ... Connection tool 11a, 11b ... Step part 12, 13 ... Discharge tubes 14, 17, 19, 21: Discharge tube components 15a: Plate spring portions 16b, 20a: Gas flow portions 22a: Brush portions

Claims (6)

[Claims] 1. A discharge tube structure comprising a tubular ground electrode supported in a container and grounded, a discharge tube and a connector, and one end of which is supported on the inner periphery of the ground electrode via a spacer. And a high-voltage electrode provided on the inner periphery of the discharge tube and connected to a high-voltage power supply, and the connector has a ring-like shape and has a step portion fitted on both sides to the inner periphery of the discharge tube. An ozone generating apparatus, wherein a plurality of discharge tubes are connected to each other to generate ozone by flowing a source gas into a discharge space between the discharge tubes and a ground electrode. 2. A discharge tube comprising a tubular ground electrode supported in a container and grounded, comprising a discharge tube and a connector, and provided at one end of the ground electrode and closed at one end; A high-voltage electrode connected to a high-voltage power supply is provided on the inner periphery of the discharge tube, and the connector has a ring-shaped stepped portion on both sides to be fitted to the inner periphery of the discharge tube. The discharge tube is connected and the connector is fitted to the inner periphery of the ground electrode, and has a gas flow portion between the step and the outer periphery. An ozone generator characterized in that ozone is generated by flowing gas. 3. A discharge tube structure comprising a tubular ground electrode supported in a container and grounded, a discharge tube and a connector, and one end of which is supported on the inner periphery of the ground electrode via a spacer. And a high-voltage electrode provided on the inner periphery of the discharge tube and connected to a high-voltage power supply, and the connector has a ring shape that fits with the outer periphery of the discharge tube, and connects a plurality of discharge tubes via the connector. An ozone generator characterized in that ozone is generated by flowing a source gas into a discharge space between a discharge tube and a ground electrode. 4. A discharge tube comprising a tubular ground electrode supported in a container and grounded, comprising a discharge tube and a connector, and having a one-end closed discharge tube provided on the inner periphery of the ground electrode. A high-voltage electrode connected to a high-voltage power supply and connected to the outer periphery of the discharge tube in a ring shape. The plurality of discharge tubes are connected and connected via the connection device. The tool is fitted with the inner periphery of the ground electrode, has a gas flow portion, and flows the raw material gas into the discharge space between the discharge tube and the ground electrode to generate ozone. Ozone generator. 5. A pair of leaf springs, wherein a high voltage electrode formed on the inner periphery of one discharge tube and a high voltage power source are connected via a brushed conductor, and the high voltage electrodes of each discharge tube are expanded at both ends. The ozone generator according to any one of claims 1 to 4, wherein the ozone generator is connected via a conductor having a portion. 6. A high-voltage electrode formed on the inner periphery of one discharge tube and a high-voltage power supply are connected via a brushed conductor, and the high-voltage electrodes of each discharge tube are connected via a conductor having brush portions at both ends. The ozone generator according to any one of claims 1 to 4, wherein the ozone generator is connected to the ozone generator.