JPH0630129U - Discharger for generating ceramic ozone - Google Patents

Abstract

(57) [Abstract] [Purpose] By using piezoelectric ceramics for the substrate of the ceramic ozone generating discharge body, a large amount of ozone generating discharge body having uniform dustproof characteristics can be produced. [Structure] A piezoelectric ceramic is used for the substrate 1, and a ground electrode 2 is used.
The auxiliary electrode 6 is provided at a position opposed to the substrate with the substrate sandwiched therebetween. A power supply 11 for driving the piezoelectric vibrator is provided between the ground electrode 2 and the auxiliary electrode 6.
The substrate 1 is vibrated by connecting the. [Effect] Since the ozone generating discharge body and the vibrator can be integrated, a large number of discharge bodies having uniform dustproof characteristics can be produced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement for improving the reliability of an ozone generating discharge body used in a humid and dusty environment.

[0002]

[Prior art]

 Ozone is obtained by discharging in air, has a strong oxidizing power, and is used not only industrially for deodorization, sterilization, bleaching, but also for consumer use. Such an ozone-generating discharge body has a ground electrode, a dielectric layer made of alumina ceramics, a high-voltage electrode, and an overcoat layer made of alumina ceramics, which are sequentially laminated on an alumina ceramic substrate, and a high-frequency electrode is placed between the ground electrode and the high-voltage electrode. It was used that a high voltage was applied to generate a creeping discharge. Further, as disclosed in JP-A-62-201638 and JP-A-03-67029, there is also one in which a piezoelectric vibrator is attached to one surface of a ceramic substrate to remove water and dust adhering to the surface of the discharge body. It was

[0003]

[Problems to be solved by the device]

 As described above, in the conventional ozone-generating discharge body, since the piezoelectric vibrator is attached with an adhesive or the like, the resonance frequency varies greatly depending on the thickness of the adhesive layer, the curing conditions, and the material. It was difficult to fully utilize. Further, there is a defect that cracks and peeling of the adhesive layer occur during long-term operation and the vibration of the vibrator cannot be sufficiently transmitted to the discharge body.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a structure in which a ground electrode, a dielectric layer, a high voltage electrode, and an overcoat layer are sequentially laminated on a piezoelectric ceramic substrate that acts as a vibrator.

[0005]

[Action]

 In the present invention configured as described above, since the piezoelectric ceramics is used as the substrate, there is no change in the resonance frequency due to variations when attaching the vibrator, and the durability is improved, so that the vibration characteristics are uniform. It is possible to produce a large amount of various ozone-generating discharge bodies.

[0006]

【Example】

FIG. 1 is a sectional view of an ozone generating discharge body according to the present invention. The substrate 1 is made of a ceramic having a piezoelectric property such as Pb (Ti, Zr) O ₃ and is formed by tape molding and then baked. The ground electrode 2 is formed of a paste such as Ag or Ni by screen printing. Alternatively, a conductive substance such as Ag or Ni may be formed by a vacuum deposition method, a sputtering method or the like. The dielectric layer 3 is formed by pasting glass or crystallized glass to a thickness of several μm to several hundreds of μm by a method such as screen printing. The high-voltage electrode 4 is formed by applying a paste of Ag, Ni, Au, etc., like the ground electrode. The overcoat layer 5 is formed by coating glass, crystallized glass, or ceramics so as to cover the high-voltage electrode 4. The auxiliary electrode 6 is formed by applying a paste such as Ag or Ni to the other surface of the piezoelectric substrate, and baking the whole body to integrate it. After firing, the integrated ozone generating discharge body was immersed in silicon oil maintained at 120 ° C., and a DC voltage was applied between the auxiliary electrode 6 and the ground electrode 2 so that an electric field strength of 3 KV / mm was applied to perform polarization treatment. To do. Finally, the high-voltage applying lead wire 7 for ozone generation, the vibrator-driving voltage applying lead wire 8, and the common grounding lead wire 9 may be respectively soldered to predetermined positions. The output of the high frequency high voltage power source 10 for generating ozone is connected to the ground electrode 2 and the high voltage electrode 4 through lead wires 7 and 9. The output of the oscillator driving power source 11 is connected to the ground electrode 2 and the auxiliary electrode 6 by the lead wires 2 and 8.

The resonance frequency was measured in order to vibrate the substrate 1 of the ozone-generating discharge body manufactured as described above. In addition, as a comparative example, the resonance frequency was measured for a vibrator to which an epoxy adhesive was attached. As a result, the standard deviation of the resonance frequency is as shown in Table 1, and it was found that the standard deviation of the present invention is small.

[Table 1]

[Effect of device]

 As described above, according to the present invention, it is possible to efficiently remove water and dust adhering to the surface of the discharge body, and to provide a discharge body for ozone generation that is highly reliable and has uniform vibration characteristics.

[0008]

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an ozone generating discharge body of the present invention.

[Explanation of sign]

 1 Piezoelectric Ceramics Substrate 2 Ground Electrode 3 Dielectric Layer 4 High Voltage Electrode 5 Overcoat Layer 6 Auxiliary Electrode 7 High Voltage Applying Lead Wire 8 Oscillator Drive Voltage Applying Lead Wire 9 Common Grounding Lead Wire 10 Ozone Generating High Frequency High Voltage Power supply 11 Power supply for oscillator drive

Claims (2)

[Scope of utility model registration request] 1. A discharge body for ozone generation in which a ground electrode, a dielectric layer, a high voltage electrode and an overcoat layer are sequentially laminated on one surface of the substrate, wherein the substrate is made of a piezoelectric material. Discharge body for generating ceramic ozone. 2. The substrate according to claim 1, wherein an auxiliary electrode is provided so as to face the ground electrode with the substrate interposed therebetween, and an AC voltage is applied between the ground electrode and the auxiliary electrode to vibrate the substrate. Discharger for generating ceramic ozone.