Ozone generator

Abstract

When two electrodes or one of the electrodes is connected to GND or the ground, touching the other electrode causes an electric shock. To solve the problem that an ozone generating unit becomes large in accordance with a structure design for preventing an electrode for preventing an electric shock from being touched, and a cost and a product design are restricted.SOLUTION: In the ozonizer 1, a dielectric 4 is provided between a first electrode 2 and a second electrode 3 facing each other, and the dielectric 4 is completely adhered to the first electrode 2. By applying an AC high voltage 9 between the first and second electrodes, discharge occurs in the discharge space 8, and the raw material gas containing oxygen gas supplied to the discharge space 8 is activated to obtain ozone gas. A part of the dielectric body 4, the first electrodes 2 and the AC power source part are housed in a case and embedded in an insulating filler 7, the second electrodes 3 exposed to the outside of the case are connected to the GND14 of the AC power source part or the ground 15, and the dielectric body 4 is covered, and the height of the discharge space 8 is lowered to prevent the dielectric body 4 from being touched, thereby preventing an electric shock.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an ozone gas generator including an ozone generator that has components of a first electrode and a second electrode that are provided opposite to each other and generates ozone gas. [Background technology]

[0002] Conventional ozone gas generators generally use either a surface discharge type in which a metal plate (conductor) is placed on top of a ceramic plate (dielectric), or a dielectric barrier discharge type in which glass or ceramic (dielectric) is sandwiched between metal plates (conductors). In either type, a high AC voltage is applied between a pair of electrodes to generate a surface discharge or a dielectric barrier discharge in the discharge space between the electrodes, and a raw material gas containing oxygen gas is supplied to the discharge space to generate ozone gas.

[0003] Furthermore, in conventional ozone gas generators, the pressure inside the ozone generator fluctuates depending on the flow rate of the raw material gas supplied. To solve this problem, an ozone generator has been proposed that can stably generate high-concentration ozone relative to the flow rate of the raw material gas supplied (see Patent Document 1). Furthermore, in Patent Document 2, the electrode on the front surface is connected to the ground side to prevent electric shock even if the electrode on the front surface is accidentally touched. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6723661 [Patent Document 2] Japanese Patent Publication No. 2022-062495 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in conventional ozone generators having the above-described ozone generator configuration and the ozone generator described in Patent Document 1, touching the electrode can cause electric shock. Also, in Patent Document 2, the surface electrode is grounded, so that accidentally touching the surface electrode will not cause electric shock, but touching the ungrounded electrode can cause electric shock. To prevent electric shock, the electrodes are designed to prevent fingers from getting into them or are located in places where fingers cannot reach them, but this increases the size of the ozone generation unit and costs. Furthermore, since the electrodes are located in places where they cannot be touched, product design is restricted.

[0006] In order to solve the above-mentioned problems of the conventional art, the object of the present invention is to provide a compact and inexpensive ozone generator which does not give electric shocks even when touching the electrodes and which makes it impossible to touch the electrodes that would give electric shocks. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides an ozone generator having a first electrode and a second electrode arranged opposite to each other, which receives a source gas containing oxygen gas as input and outputs ozone gas, wherein the second electrode is configured to cover a dielectric on the first electrode via a discharge space, and the ozone generator is provided with an AC power supply unit which applies a high AC voltage to the first and second electrodes, and the application of the high AC voltage causes discharge in the discharge space, activating the source gas supplied to the discharge space to produce ozone gas, all or part of the dielectric, the first electrode, and the AC power supply unit are located within a case, the first electrode located within the case is inaccessible, and the second electrode which is exposed to the outside of the case and can be touched is connected to the GND or ground of the AC power supply unit, and the height of the discharge space is low so that the dielectric on the first electrode cannot be touched, thereby preventing electric shock.

[0008] The ozone generator of the present invention is characterized in that all or part of the dielectric, the first electrode, and the AC power supply unit are embedded in an insulating material filled in the case. [Effects of the Invention]

[0009] In the ozone generator of the present invention, electric shock can be prevented by embedding all or part of the dielectric, the first electrode, and the AC power supply in an insulating material filled in the case. This is effective in reducing the cost required for a structure designed to prevent electric shock, improving design freedom by eliminating design restrictions, and improving safety by preventing electric shock. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram showing the configuration of an ozone generator driven by a DC voltage according to the present invention. [Figure 2] FIG. 1 is a block diagram showing the configuration of an ozone generator driven by an AC voltage according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following description will be given with reference to the drawings. The present invention is an ozone generator 1 having a first electrode 2 and a second electrode 3 provided opposite to each other, receiving a raw material gas containing oxygen gas as an input, and outputting ozone gas.

[0012] In the ozone generator of the present invention, a dielectric 4 is provided between a first electrode 2 and a second electrode 3, and the first electrode 2 and the dielectric 4 are in complete contact with each other. The dielectric 4 is preferably made of a material that does not carbonize, such as glass or ceramic. The second electrode 3 is configured to cover the dielectric 4 on the first electrode 2 via the discharge space 8, and is made of a non-corrosive metal such as stainless steel.

[0013] The ozone generator of the present invention includes an AC power supply unit 5 that applies an AC high voltage 9 between a first electrode 2 and a second electrode 3. The AC power supply unit 5 has a primary side 10 of a circuit that is driven by a DC voltage 12 (FIG. 1) or an AC voltage 13 (FIG. 2). In either case, the application of AC high voltage 9 to a secondary side 11 of the circuit causes discharge in a discharge space 8, and the raw material gas supplied to the discharge space 8 is activated to produce ozone gas.

[0014] In order to obtain ozone gas stably, it is necessary to stably discharge in the discharge space 8, and for this purpose it is important to maintain a uniform height in the discharge space 8. If the second electrode 3 were to deform and create a low height in the discharge space 8, the discharge would concentrate there, making ozone generation unstable. Therefore, the second electrode 3 is designed to have sufficient strength so that the height of the discharge space 8 between the second electrode 3 and the dielectric 4 is uniform. To increase the strength of the second electrode 3, for example, the electrode may be made thicker or bent.

[0015] All or part of the dielectric 4, the first electrode 2, and the AC power supply unit 5 are inside the case, and the first electrode 2 inside the case cannot be touched, while the second electrode 3, which is exposed to the outside of the case and can be touched, is connected to GND 14 when the AC power supply unit 5 is driven by DC voltage 12 (Figure 1), or to earth 15 when it is driven by AC voltage 13 (Figure 2).In addition, although the discharge space 8 looks wide in Figures 1 and 2, the height of the discharge space 8 is low enough that a finger cannot enter, approximately 10 mm or less, and the dielectric 4 on the first electrode 2 cannot be touched, thereby preventing electric shock.

[0016] In addition, holes may be provided in the second electrode 3 to efficiently extract the ozone generated in the discharge space 8, but the size of the holes is limited to a size that prevents fingers from entering, for example, a diameter of approximately 10 mm, which is also a feature of the electric shock prevention structure.

[0017] The entire dielectric 4 except for its surface facing the discharge space 8 or the area in close contact with the first electrode 2, the first electrode 2 and the AC power supply 5 are embedded in an insulating filler 7 such as silicon or urethane that is filled in a resin case 6, thereby providing a design to prevent electric shock. [Explanation of symbols]

[0018] 1 ozone generator 2 1st electrode 3 Second electrode 4 Dielectrics 5 AC power supply section 6 Resin case 7. Insulating filler 8 Discharge space 9 AC High Voltage 10 Primary side 11 Secondary side 12 DC voltage 13 AC voltage 14 GND 15 Grounding

Claims

1. An ozone generator having a first electrode and a second electrode provided opposite to each other, receiving a raw material gas containing oxygen gas as an input, and outputting ozone gas, the second electrode is configured to cover the dielectric on the first electrode via the discharge space; an AC power supply unit that applies an AC high voltage to the first electrode and the second electrode, and discharges in the discharge space by applying the AC high voltage; The raw material gas supplied to the discharge space is activated to produce ozone gas. the whole or a part of the dielectric, the first electrode, and the AC power supply are located within a case; The first electrode inside the case cannot be touched, An ozone generator characterized in that the second electrode, which is exposed to the outside of the case and can be touched, is connected to the GND or earth of the AC power supply, and the height of the discharge space is made low so that the dielectric on the first electrode cannot be touched, thereby preventing electric shock.

2. 2. The ozonizer according to claim 1, wherein all or a part of the dielectric, the first electrode, and the AC power supply unit are embedded in an insulating filler filled in the case.

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