Ozone Generator

Abstract

When two electrodes are connected, or when one electrode is connected to GND or earth, touching the other electrode will cause an electric shock. Due to the structural design that makes it impossible to touch the electrodes to prevent electric shock, the ozone generation unit becomes large, and the cost and product design constraints are issues. [Solution] In order to achieve the above object, an ozone generator 1 of the present invention has a dielectric 4 provided between a first electrode 2 and a second electrode 3 opposed to each other, and the dielectric 4 is in complete contact with the first electrode 2. A high AC voltage 9 is applied between the first and second electrodes to cause a discharge in a discharge space 8, and the raw material gas containing oxygen gas supplied to the discharge space 8 is activated to produce ozone gas. A part of the dielectric 4, the first electrode 2, and an AC power supply unit are housed in a case and embedded in an insulating filler 7, and the second electrode 3 exposed outside the case is connected to the GND 14 or ground 15 of the AC power supply unit and is configured to cover the dielectric 4, and the height of the discharge space 8 is lowered to prevent contact with the dielectric 4, thereby preventing electric shock.

Description

[Technical field]

[0001] The present invention relates to an ozone gas generator including an ozone generator having components of a first electrode and a second electrode provided opposite to each other and generating 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 a ceramic plate (dielectric) or a dielectric barrier discharge type in which glass or ceramics (dielectric) is sandwiched between metal plates (conductors). In either case, an ozone generator is generally used that applies a high AC voltage between a pair of electrodes, generates a surface discharge or a dielectric barrier discharge in the discharge space between the electrodes, supplies a raw material gas containing oxygen gas to the discharge space, and generates ozone gas.

[0003] In addition, 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 stably generates 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 side is connected to the ground side and is grounded, thereby preventing electric shock even if the electrode on the front side is accidentally touched. [Prior art documents] [Patent documents]

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

[0005] However, in conventional ozone generators having the ozone generator of the above configuration and the ozone generator described in Patent Document 1, touching the electrode causes an electric shock. Also in Patent Document 2, the surface electrode is grounded, so that even if the surface electrode is touched by mistake, there is no risk of electric shock, but if the ungrounded electrode is touched, an electric shock will occur. To prevent electric shock, the electrodes are designed so that fingers cannot be inserted into them, or are placed in positions where fingers cannot touch them, but this makes the ozone generating unit larger and increases costs. Also, since the electrodes are placed in positions 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 prevents electric shock even when touching the electrodes and makes it impossible to touch the electrodes that may cause electric shock. [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 opposed to each other, which receives a raw material gas containing oxygen gas and outputs ozone gas, the second electrode being configured to cover a dielectric on the first electrode via a discharge space, the ozone generator including an AC power supply unit which applies a high AC voltage to the first and second electrodes, and which generates ozone gas by activating the raw material gas supplied to the discharge space through the application of the high AC voltage, and which is characterized in that all or a 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 cannot be touched, 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 reduced 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 a part of the dielectric, the first electrode, and the AC power supply unit are embedded in an insulating material filled in the case. Effect 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 unit in an insulating material filled in the case. This is effective in reducing the cost required for a structure to prevent electric shock, improving design freedom by eliminating design restrictions, and improving safety by preventing electric shock. [Brief description 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. [Diagram 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 PREFERRED EMBODIMENTS

[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 comprises an AC power supply unit 5 which applies an AC high voltage 9 between the first electrode 2 and the second electrode 3. The AC power supply unit 5 has a primary side 10 of a circuit which is driven by a DC voltage 12 (FIG. 1) or an AC voltage 13 (FIG. 2). In either case, the application of the AC high voltage 9 to the secondary side 11 of the circuit causes a discharge in the 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 the discharge space 8, and for this purpose it is important to keep the height of the discharge space 8 uniform. If the second electrode 3 were to deform and a location where the height of the discharge space 8 is low were to occur, the discharge would concentrate there, making ozone generation unstable. Therefore, the second electrode 3 is designed to have strength, and the height of the discharge space 8 between the second electrode 3 and the dielectric 4 is designed to be 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. 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 (Fig. 1), or to ground 15 when it is driven by AC voltage 13 (Fig. 2). Also, although the discharge space 8 looks wide in Figs. 1 and 2, the height of the discharge space 8 is made low enough that a finger cannot enter it, approximately 10 mm or less, so that the dielectric 4 on the first electrode 2 cannot be touched, thereby preventing electric shock.

[0016] In addition, a hole may be provided in the second electrode 3 to efficiently extract the ozone generated in the discharge space 8. The size of the hole is limited to a size that a finger cannot fit through, for example, a diameter of approximately 10 mm, which is also a feature of the electric shock prevention structure.

[0017] The whole of the dielectric 4 except for its surface facing the discharge space 8 or the part in close contact with the first electrode 2, the first electrode 2 and the AC power supply unit 5 are embedded in an insulating filler 7 such as silicone 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, 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 is provided that applies an AC high voltage to the first electrode and the second electrode, and discharge is generated 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 a second electrode exposed to the outside of a case and accessible to the outside is connected to the GND or earth of an AC power supply, and the height of the discharge space is set so that the dielectric on the first electrode cannot be touched, thereby preventing electric shock.

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

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