JPH059003Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an ozone generator used in a deodorizing device or the like that oxidizes and decomposes malodorous components with ozone.

<Prior Art> An example of a conventional ozone generator will be described with reference to FIGS. 4 and 5.

As shown in FIGS. 4 and 5, a conventional ozone generator has a thin plate-like substrate 31 made of an insulating dielectric material such as ceramic, and a discharge electrode 32 on the non-grounded side formed by a tungsten frit on one surface of the thin plate substrate 31. (hereinafter referred to as non-grounded electrode 32), the thin plate-like substrate 31 and the non-grounded electrode 32 form a non-ground side electrode part 33, and one surface of a thin plate-like substrate 34 similar to the thin plate-like substrate 31. A tungsten frit is fired into a flat plate shape to form a ground side discharge electrode 35 (hereinafter referred to as the ground electrode 35).
The thin plate-like substrate 34 and the ground electrode 35 form a ground side electrode part 36, and the non-ground side electrode part 3
One surface of the thin plate substrate 34 of the non-ground electrode portion 36 is brought into contact with the other surface of the thin plate substrate 31 of No. 3, and the two are heated and pressed together to form an ozone generating electrode portion;
A cord (not shown) for applying a high voltage is connected to the non-grounded electrode 33 and the grounded electrode 35.

<Problems to be solved by the invention> In the ozone generator configured as described above, the non-grounded electrode of the non-grounded side electrode portion is formed in a linear shape to reduce the discharge area and facilitate discharge. However, since the discharge area of the non-grounded electrode is small, the discharge current density becomes high and the non-grounded electrode is easily deteriorated.The ozone generation performance decreases in a short period of time, and the replacement period of the electrode part is shortened. The drawback was that it took a lot of time to replace.

An object of the present invention is to provide an ozone generator that can eliminate the above-mentioned drawbacks.

<Means for solving the problem> In order to achieve the above object, this invention has a linear discharge electrode on the non-grounded side that generates discharge by applying a high voltage to the front side of a thin plate made of an insulating dielectric material such as ceramic. The provided non-grounded side electrode part and the flat grounded discharge electrode are provided on the front side of another insulating dielectric thin plate, and the flat discharge electrode is attached to the back side of this insulating dielectric thin plate by penetrating this thin plate. and a ground side electrode part provided with a connection part that conducts with the ground side electrode part, and is formed by bonding the back side of the insulating dielectric thin plate of the non-ground side electrode part and the front side of the insulating dielectric thin plate of the ground side electrode part. In an ozone generator that includes a generating electrode and converts oxygen in the air into ozone by discharge between the discharge electrode on the non-grounded side and the discharge electrode on the grounded side, the ozone generator near the discharge electrode of the non-grounded side electrode part A spare non-grounded discharge electrode is provided on the front side of the insulating dielectric thin plate, and the above electrode is connected to one end of one of the two secondary windings of the transformer for supplying high voltage etc. to be applied to the above electrode. Connect the connection part of the ground side electrode, and connect one end of the photodiode constituting the photocoupler, which is connected to the regular discharge electrode on the non-ground side, to the other end of the above one winding, and the spare non-ground side electrode. a collector of the phototransistor of the photocoupler connected to one end of the relay contact connected to the discharge electrode, and connected to one end of the other winding of the secondary winding by the photodiode; A collector is connected to one end of the relay coil of the relay,
The emitters of the transistors that are energized when the phototransistor ceases to conduct are connected to each other, and one end of the resistor connected to the emitter of the phototransistor is connected to the other end of the other secondary winding, and the relay The other end of the phototransistor is connected to the other end of the coil, and the base of the transistor is connected to the connection point between the emitter of the phototransistor and the resistor.

<Function> In the ozone generator configured as described above, when a high voltage is applied to the discharge electrode 2 on the non-grounded side of the non-grounded electrode section 6 and the discharge electrode 8 on the grounded side of the grounded electrode section 10, the ozone generator Ozone is generated by discharging between the discharge electrode 2 on the ground side and the discharge electrode 8 on the ground side, and when the discharge electrode 2 on the non-ground side deteriorates and the ozone generation performance decreases, the spare discharge electrode 4 is used. Switch to generate ozone.

<Example> As shown in FIGS. 1 to 3, the ozone generator of the present invention has a thin plate-shaped substrate 1 made of an insulating dielectric material such as ceramic, and a tungsten frit in the form of a non-grounded wire on one surface. A side discharge electrode 2 (hereinafter referred to as non-grounded electrode 2) is provided, a connection portion 3 for applying a high voltage is provided at one end of the non-grounded electrode 2, and a connection portion 3 is provided next to the non-grounded electrode 2 of the thin plate-like substrate 1. A linear auxiliary discharge electrode 4 (hereinafter referred to as auxiliary electrode 4) is provided which is switched to perform discharge when the linear non-grounded electrode 2 deteriorates due to a tungsten frit, and a high voltage is applied to one end of the auxiliary electrode 4. A connecting portion 5 for applying the voltage is provided, a non-ground side electrode portion 6 is formed by the thin plate substrate 1, the non-grounded electrode 2, and the preliminary electrode 4, and a thin plate substrate similar to the thin plate substrate 1 is provided. A tungsten frit is fired into a flat plate shape on one surface of the tungsten frit so that it faces both the non-ground electrode 2 and the preliminary electrode 4 of the non-ground electrode part 6 when brought into contact with the non-ground electrode part 6. A discharge electrode 8 on the ground side (hereinafter referred to as ground electrode 8) is provided on the other side of the thin plate-like substrate 7, and a connecting portion 9 for applying a high voltage is provided on the other surface of the thin plate-like substrate 7, the ground electrode 8 , the connection part 9 and the ground side electrode part 1
0, and the other surface of the thin plate-like substrate 1 of the non-grounded side electrode part 6 and the thin plate-like substrate 7 of the ground electrode part 10.
An ozone-generating electrode portion is formed by bringing the two surfaces into contact with each other and heat-pressing the two to generate ozone.

As shown in FIG. 3, the electric circuit of the ozone generator having the above configuration is such that one end of the primary winding of the transformer 13 is connected to one end of the AC power supply 11 via the power switch 12, and the other end of the primary winding of the transformer 13 is The above AC power supply 1 at the end
1 is connected to one end of one of the two secondary windings of the transformer 13 via a resistor 14 to the connection portion of the regular ground side electrode 2 of the non-ground side electrode section 6. 3 is connected, the other end of the one winding is connected to the connection part 9 of the ground electrode 8 of the ground side electrode part 10, and the phototransistor 1 is connected in parallel to the resistor 14.
photodiode 1 forming a photocoupler together with 6;
7 and a resistor 15 are connected, and the relay coil 18 is connected to the connection point between one end of the one secondary winding and the resistor 14 through a relay contact 19 forming a relay with the relay coil 18. The preliminary electrode 4 of the non-grounded electrode section 6 is connected, and one end of a smoothing capacitor 21 is connected to one end of the other winding of the secondary winding via a diode 20, and the other end of this capacitor 21 is The collector of the phototransistor 16 of the photocoupler is connected to the other end of the other secondary winding, and the collector of the phototransistor 16 of the photocoupler is connected to the connection point between the diode 20 and the capacitor 21, which is conductive by the photodiode 17. The emitter of the transistor 16 is connected to the other end of the other secondary winding through the resistor 22, the emitter of the transistor 23 is connected to the collector of the phototransistor 16, and the base of the transistor 23 is connected to the other end of the other secondary winding. Connect the emitter of the above transistor 2
3 is connected to the other end of the other secondary winding through a relay coil 18 of the relay that opens and closes the relay contact 19, and a capacitor 24 is connected in parallel to the relay coil 18. .

To explain the operation of the ozone generator configured as above, when the power switch 12 is turned on, the primary voltage Vi is applied from the AC power supply 11 to the primary side of the transformer 13, and the high voltage Vo is applied to the secondary side of the transformer 13.
is induced, and the high voltage Vo
is applied, and as a result of the application of the high voltage Vo, some electrons in the air and in the thin plate-like substrate 1 of the non-grounded side electrode part 6 leave the tissue bond and become free electrons, which connect the non-grounded electrode 2 and the ground. By flowing radially between the non-grounded electrode 2 and the grounded electrode 8, a discharge occurs between the non-grounded electrode 2 and the grounded electrode 8, and when the non-grounded electrode 2 is a positive electrode and the grounded electrode 8 is a negative electrode, a discharge occurs from the grounded electrode 8. The free electrons move toward the non-grounded electrode 2, and a discharge current flows from the non-grounded electrode 2 to the grounded electrode 8. When the polarity of the non-grounded electrode 2 and the grounded electrode 8 is reversed, the free electrons and the discharge current flow. The flow is also reversed, and oxygen in the air is activated by the free electrons and becomes ozone.

When the non-grounded electrode 2 is the positive electrode, the photodiode 17 of the photocoupler is also energized and the photodiode 17 emits light, making the phototransistor 16 of the electrode switching means connected to the secondary side of the transformer 13 conductive, so that the transistor 23 Since the potential of the emitter and the potential of the base are approximately equal to each other, the transistor 23 is not conductive and the relay coil 18 is not energized, so the relay contact 19 is in an open state and a high When the voltage Vo is not applied and the non-grounded electrode 6 is reversed to the negative polarity, the photodiode 17 becomes non-conductive and does not emit light, and the phototransistor 16 becomes non-conductive, but since the diode 20 is non-conductive, the relay coil 18 is not energized and the relay contact 19 remains open.

When the non-grounded electrode 2 is a positive electrode, when the discharge is stopped due to deterioration or failure of the non-grounded electrode 2 of the non-grounded side electrode section 6, current no longer flows to the photodiode 17, and the photodiode 17 does not emit light. The phototransistor 16 becomes non-conductive, the base and emitter of the transistor 23 are forward biased, the transistor 23 becomes conductive, the relay coil 18 is energized, and the capacitor 24 is charged, and the relay coil 1
8 operates to close the relay contact 19 and apply the high voltage Vo to the preliminary electrode 4 to cause discharge between the preliminary electrode 4 and the ground electrode 8 to generate ozone. When the non-grounded electrode 2 is reversed to the negative polarity, the diode 20 becomes non-conductive and no current flows, but the capacitor 24 discharges and the relay coil 18 is energized, so the relay contact 19 remains closed. The preliminary electrode 4 discharges and generates ozone.

In the above embodiment, the high-voltage electrode 2 is switched to the preliminary electrode 4 using a photocoupler and a relay consisting of a photodiode 16 and a phototransistor 20, but it is also possible to detect the amount of ozone generated and switch based on the amount of ozone generated. Alternatively, a changeover switch may be provided so that the user can manually switch.

In the above embodiment, only one preliminary electrode 4 is provided, but a plurality of preliminary electrodes 4, such as two or three, may be provided.

Further, in the above embodiment, the preliminary electrode 4 is provided only on the non-ground side electrode portion 6, but the preliminary electrode may be provided on the ground side electrode portion 10 as well.

<Effects of the invention> Since the ozone generator of the invention is configured as described above, when the regular non-grounded electrode deteriorates and stops discharging, it automatically switches to the spare electrode. Ozone generation can be maintained even if the user does not notice deterioration of the electrode.

[Brief explanation of drawings]

Fig. 1 is a perspective view of essential parts showing an embodiment of the ozone generator of the present invention, Fig. 2 is a sectional view of Fig. 1, and Fig. 3 is an electric circuit showing an embodiment of the ozone generator of the present invention. 4 is an exploded perspective view of a main part showing an example of a conventional ozone generator, and FIG. 5 is a perspective view of a main part showing an example of a conventional ozone generator. In the figure, 2...ungrounded electrode, 4...preliminary electrode, 6
...Non-ground electrode part, 8...Ground electrode, 10...Ground side electrode.

Claims (1)

[Scope of Claim for Utility Model Registration] A linear non-grounding side discharge electrode that discharges by applying a high voltage is provided on the front side of a thin plate made of an insulating dielectric material such as ceramic, and a flat plate-like non-grounding side electrode portion. A ground-side electrode section in which a ground-side discharge electrode is provided on the front side of another insulating dielectric thin plate, and a connection part is provided on the back side of this insulating dielectric thin plate to penetrate this thin plate and conduct with the flat discharge electrode. and an ozone generating electrode formed by bonding the back side of the insulating dielectric thin plate of the non-grounding side electrode section and the front side of the insulating dielectric thin plate of the grounding side electrode section, and the above-mentioned discharge electrode on the non-grounding side. In an ozone generator that converts oxygen in the air into ozone by discharging between the electrode and the grounding side discharge electrode, a spare non-grounding side is installed on the front side of the insulating dielectric thin plate near the discharge electrode of the non-grounding side electrode section. A discharge electrode is provided, and the connection part of the ground side electrode is connected to one end of one of the two secondary windings of the transformer for supplying high voltage etc. to be applied to the above electrode, At the other end of the winding, one end of a photodiode constituting a photocoupler is connected to the regular discharge electrode on the non-grounded side, and one end of a relay contact is connected to the spare discharge electrode on the non-grounded side. and a collector of a phototransistor of the photocoupler conductive by the photodiode is connected to one end of the other winding of the secondary winding, and a collector is connected to one end of the relay coil of the relay,
The emitters of the transistors that are energized when the phototransistor ceases to conduct are connected to each other, and one end of the resistor connected to the emitter of the phototransistor is connected to the other end of the other secondary winding, and the relay An ozone generator characterized in that the base of the transistor is connected to the other end of the coil and the connection point between the emitter of the phototransistor and the resistor.