JPH11228111A - Ozone generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a need of care such as maintenance and inspection over a long period of time by providing only plural discharge electrodes and using the electrodes while switching in turn by detecting discharge failure. SOLUTION: A discharge current value is monitored to judge whether it will less than a set value by detecting a discharge current made to flow by an electrical discharge between the discharge electrode 8 and a dielectric electrode 9 with a discharge failure detecting circuit 12, and in the case when the discharge current value is less than the set value, a discharge electrode selecting circuit 13 is subjected to switching operation so that high frequency high voltage may be impressed to other discharge electrode 8, and a discharge function is made to continue by an unused discharge electrode 8 by recognizing that the electrode reaches the discharge failure state as a result that the electrical discharge is executed over a long period of time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone generator provided with a plurality of discharge electrodes alone and having a function of detecting a discharge failure and sequentially switching to use.

[0002]

2. Description of the Related Art The sterilizing, deodorizing and decolorizing effects of ozone gas have been known for a long time, and water treatment devices, air cleaning devices and the like utilizing these effects have been commercialized. For example, a discharge type ozone generator using air as a raw material is currently most frequently used because of its simplicity.

[0003]

However, in such a discharge type ozone generating apparatus, pure air or dry clean air is not used as a raw material, but ordinary air is used as a raw material. This leads to surface contamination of the discharge part, and the life is shortened to about 8000 hours. The present invention has been proposed in order to improve such a point, by providing a plurality of discharge electrodes only, detecting a discharge failure, by sequentially switching and using, for a long time,
An object of the present invention is to provide an ozone generator which does not require labor such as maintenance points.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides an ozone generator for generating ozone by discharge by taking in the atmosphere, and a discharge power supply for applying a discharge voltage to the ozone generator. The ozone generating section has a discharge box that takes in the atmosphere and secures a discharge space, and a plurality of discharge electrodes are arranged in this discharge box via an insulating plate, while the induction electrode is connected to the discharge electrode. The discharge power supply unit switches between a high-frequency high voltage application circuit that applies a high-frequency high voltage to a discharge electrode in the ozone generation unit and a high-frequency voltage applied to the discharge electrode. And a discharge failure detection circuit that detects a discharge current flowing due to discharge between the discharge electrode and the induction electrode and determines that a discharge failure occurs when the discharge current value becomes equal to or less than a set value. , When the discharge current value is equal to or less than the set value, the discharge electrode selection circuit, and to switch the application of high-frequency high voltage from the high frequency high voltage application circuit sequentially to other discharge electrodes. Further, the present invention includes an ozone generation unit that generates ozone by discharge by taking in the atmosphere, and a discharge power supply unit that applies a discharge voltage to the ozone generation unit, and the ozone generation unit secures a discharge space by taking in the air. A plurality of discharge electrodes are disposed on the discharge box via an insulating plate, and an induction electrode is arranged to form a discharge between the discharge electrode and the discharge electrode. Is a high-frequency high-voltage application circuit that applies a high-frequency high voltage to the discharge electrode in the ozone generator, a discharge electrode selection circuit that switches the high-frequency voltage applied to the discharge electrode, and a circuit between the discharge electrode and the induction electrode. A discharge failure detection circuit that detects light emission caused by discharge and determines that a discharge failure occurs when the light emission amount falls below a set value, and a discharge electrode selection circuit when the light emission amount falls below the set value. By The application of high-frequency high voltage from the high frequency high voltage application circuit was successively switched to other discharge electrodes. Further, the present invention includes an ozone generation unit that generates ozone by discharge by taking in the atmosphere, and a discharge power supply unit that applies a discharge voltage to the ozone generation unit, and the ozone generation unit secures a discharge space by taking in the air. A plurality of discharge electrodes are disposed on the discharge box via an insulating plate, and an induction electrode is arranged to form a discharge between the discharge electrode and the discharge electrode. Is a high-frequency high-voltage application circuit that applies a high-frequency high voltage to the discharge electrode in the ozone generator, a discharge electrode selection circuit that switches the high-frequency voltage applied to the discharge electrode, and a circuit between the discharge electrode and the induction electrode. A discharge failure detection circuit that detects heat generated by the discharge and determines that a discharge failure occurs when the amount of generated heat is equal to or less than a set value; By The application of high-frequency high voltage from the high frequency high voltage application circuit was successively switched to other discharge electrodes. In the configuration described above, a plurality of discharge electrodes can be arranged on one insulating plate in parallel with each other at predetermined intervals. Further, the plurality of discharge electrodes may be respectively arranged on a plurality of insulating plates arranged in parallel or in series with each other. Further, the plurality of discharge electrodes may be formed on an inner surface of one cylindrical insulating tube.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an ozone generator according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an ozone generator 1. The ozone generator 1 includes an ozone generation unit 3 on a housing 2 that discharges the air as a raw material and discharges the air into the air to generate ozone by a discharge unit described below. A discharge power supply unit (described later) is mounted on the housing 2 so as to apply a high voltage to a discharge unit. The ozone generator 3 has a discharge box 4 for taking in air to secure a discharge space. The discharge box 4 has an inlet 5 for air and a discharge port 6 for ozone generated by discharge in the box. Is provided. In the discharge box 4, a plurality of discharge electrodes 8 are disposed in parallel with each other at appropriate intervals via an insulating plate 7 as shown in FIG.

Next, the discharge power supply unit 10 mounted on the housing 2
Will be described with reference to FIG. The discharge power supply unit 10 includes a high-frequency high-voltage application circuit 11 for applying a high-frequency high voltage to the discharge electrode 8 in the ozone generator 3, a discharge failure detection circuit 12, and a discharge electrode selection circuit 13. That is, the discharge power supply unit 10 constitutes a circuit from the high-frequency high voltage application circuit 11 to the discharge electrode selection circuit 13, the discharge electrode 8, the induction electrode 9, and the high-frequency high voltage application circuit 11 in the ozone generation unit 3, The induction electrode 9 and the high-frequency high-voltage application circuit 11 are in communication with each other via a discharge failure detection circuit 12. The high-frequency high-voltage application circuit 11, the discharge failure detection circuit 12, and the discharge electrode selection circuit 13 may each have a known configuration, and a specific circuit configuration and a detailed description thereof will be given here. Is omitted. In such a discharge power supply unit 10,
A high-frequency high voltage is applied to one of the discharge electrodes 8 via the discharge electrode selection circuit 13, and a discharge current flowing due to discharge between the discharge electrode 8 and the induction electrode 9 is detected by the discharge failure detection circuit 12. Like that. The discharge current detected by the discharge failure detection circuit 12 is monitored, and when the discharge current value becomes equal to or less than a set value, the discharge failure is determined by the discharge electrode selection circuit 13 from the high frequency high voltage application circuit 11. The current supply path to the discharge electrode 8 can be switched so that the application of the high-frequency high voltage from the high-frequency high-voltage application circuit 11 is sequentially switched to another discharge electrode 8.

In the above-mentioned ozone generator 1,
The discharge electrode selection circuit 13 is switched in advance so as to be electrically connected to any one of the discharge electrodes 8 in the ozone generation unit 3, and the high-frequency high voltage from the high-frequency high-voltage application circuit 11 is switched to the discharge electrode thus switched. 8 is applied. Thereby, the discharge electrode 8 and the induction electrode 9
A discharge is generated between the discharge port 4 and the oxygen in the air introduced from the intake port 5 of the discharge box 4 into ozone, which can be released from the discharge port 6 as ozone gas. Here, the discharge current flowing by the discharge between the discharge electrode 8 and the induction electrode 9 is detected by the discharge failure detection circuit 12, and the discharge current value is monitored to determine whether the discharge current is equal to or less than a set value. When the value becomes equal to or less than the set value, the discharge is performed for a long time, and as a result, it is determined that a discharge failure has occurred, so that a high-frequency high voltage is applied to the other discharge electrodes 8. 13 can be switched.

As described above, the discharge failure detection circuit 12
As a result, a discharge failure can be detected and automatically switched to an unused discharge electrode 8, so that the discharge operation can be continued by the number of discharge electrodes 8, and it is more stable than a device having only one discharge electrode. Ozone can be generated, and labor for long-term maintenance and inspection can be reduced.

Although the embodiment of the ozone generator according to the present invention has been shown and described above, in the discharge failure detection circuit 12, for example, an optical sensor is connected to the ozone generator 3
And a discharge failure may be detected from the amount of light emitted by the discharge between the discharge electrode 8 and the induction electrode 9. Further, by disposing a temperature sensor in the ozone generating section 3, it is possible to detect a discharge failure from the amount of heat generated by the discharge between the discharge electrode 8 and the induction electrode 9.

[0010] In addition, as an arrangement structure of a plurality of discharge electrodes,
Although not shown, they may be arranged on a plurality of insulating plates arranged in parallel or in series with each other. Further, the plurality of discharge electrodes may be formed on the inner surface of one cylindrical insulating tube.

[0011]

According to the present invention, a discharge failure can be detected by the discharge failure detection circuit and automatically switched to an unused discharge electrode, and the discharge operation can be continued by the number of discharge electrodes. Ozone can be generated more stably as compared with a device having only one discharge electrode, and the labor for long-term maintenance and inspection can be reduced.

[0012]

[Brief description of the drawings]

FIG. 1 is an external perspective view illustrating an embodiment of an ozone generator according to the present invention.

FIG. 2 is a schematic configuration explanatory view showing a configuration of an ozone generator in the ozone generator shown in FIG.

FIG. 3 is a block diagram showing a configuration of a discharge power supply unit in the ozone generator according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ozone generator 2 Case 3 Ozone generator 4 Discharge box 5 Inlet 6 Discharge port 7 Insulating plate 8 Discharge electrode 9 Induction electrode 10 Discharge power supply 11 High frequency high voltage application circuit 12 Discharge failure detection circuit 13 Discharge electrode selection circuit

Claims (6)

[Claims] 1. An ozone generator for generating ozone by discharge by taking in air and a discharge power supply for applying a discharge voltage to the ozone generator, wherein the ozone generator takes in air to secure a discharge space. A plurality of discharge electrodes are disposed on the discharge box via an insulating plate, and an induction electrode is arranged to form a discharge between the discharge electrode and the discharge electrode. Is a high-frequency high-voltage application circuit that applies a high-frequency high voltage to the discharge electrode in the ozone generator, a discharge electrode selection circuit that switches the high-frequency voltage applied to the discharge electrode, and a circuit between the discharge electrode and the induction electrode. A discharge failure detection circuit that detects a discharge current flowing by the discharge, and determines that a discharge failure occurs when the discharge current value falls below a set value, and discharges the discharge electrode when the discharge current value falls below the set value. Selection circuit Wherein the application of the high frequency high voltage from the high frequency high voltage application circuit is sequentially switched to another discharge electrode. 2. An ozone generator for generating ozone by discharge by taking in the atmosphere, and a discharge power supply for applying a discharge voltage to the ozone generator, wherein the ozone generator secures a discharge space by taking in the air. A plurality of discharge electrodes are disposed on the discharge box via an insulating plate, and an induction electrode is arranged to form a discharge between the discharge electrode and the discharge electrode. Is a high-frequency high-voltage application circuit that applies a high-frequency high voltage to the discharge electrode in the ozone generator, a discharge electrode selection circuit that switches the high-frequency voltage applied to the discharge electrode, and a circuit between the discharge electrode and the induction electrode. A discharge failure detection circuit that detects light emission caused by discharge and determines that a discharge failure occurs when the light emission amount falls below a set value, and a discharge electrode selection circuit when the light emission amount falls below the set value. By An ozone generator characterized in that application of a high-frequency high voltage from a high-frequency high-voltage application circuit is sequentially switched to another discharge electrode. 3. An ozone generator for generating ozone by discharge by taking in the atmosphere, and a discharge power source for applying a discharge voltage to the ozone generator, wherein the ozone generator secures a discharge space by taking in the air. A plurality of discharge electrodes are disposed on the discharge box via an insulating plate, and an induction electrode is arranged to form a discharge between the discharge electrode and the discharge electrode. Is a high-frequency high-voltage application circuit that applies a high-frequency high voltage to the discharge electrode in the ozone generator, a discharge electrode selection circuit that switches the high-frequency voltage applied to the discharge electrode, and a circuit between the discharge electrode and the induction electrode. A discharge failure detection circuit that detects heat generated by the discharge and determines that a discharge failure occurs when the amount of generated heat is equal to or less than a set value; By An ozone generator characterized in that application of a high-frequency high voltage from a high-frequency high-voltage application circuit is sequentially switched to another discharge electrode. 4. The apparatus according to claim 1, wherein the plurality of discharge electrodes are arranged on a single insulating plate in parallel with each other at predetermined intervals. Ozone generator according to any one of the above. 5. A structure according to claim 1, wherein said plurality of discharge electrodes are respectively arranged on a plurality of insulating plates arranged in parallel or in series with each other. An ozone generator according to any one of the above. 6. The ozone generator according to claim 1, wherein the plurality of discharge electrodes are formed on an inner surface of a single cylindrical insulating tube.