JPH07100601B2 - Creepage discharge type ozonizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an ozone generator utilizing creeping discharge (hereinafter,
The present invention relates to a creeping discharge type ozonizer, and more specifically, to a creeping discharge type ozonizer in which overheating associated with a creeping discharge is reduced as compared with the conventional case.

[Conventional technology]

Japanese Patent Laid-Open No. 60-60904 discloses a creeping discharge part made of a porcelain cylinder in which an induction electrode is embedded and a discharge electrode is arranged on the inner peripheral surface, and a cooling arranged on the outer peripheral surface of the creeping discharge part. Disclosed is a creeping discharge type ozonizer including a fan and a blower for blowing air to the creeping discharge part.

In this creeping discharge type ozonizer, an AC voltage is applied between both electrodes to generate a creeping discharge on the surface of the porcelain cylinder to generate ozone, and a ventilation device is used to ventilate the porcelain cylinder in parallel with the axis of the porcelain cylinder. This cools the surface of the porcelain cylinder and delivers ozone.

[Problems to be Solved by the Invention]

The conventional surface discharge type ozonizer described above is compared with the air discharge type ozonizer that generates ozone by air discharge,
Although it has the advantage that the noise during discharge is small, there is a problem that the surface of the porcelain cylinder is likely to be overheated due to the creeping discharge despite the provision of the cooling fan.

When the surface of the porcelain cylinder is overheated, the durability of the porcelain cylinder is reduced, and nitrogen oxide and nitrate are generated due to the high heat,
The generated nitrate may adhere to the surface of the discharge electrode and interfere with the discharge.

Further, in the conventional creeping discharge type ozonizer, it is necessary to dispose a blower of high output for cooling the surface of the overheated porcelain cylinder,
The noise, power consumption, and large space were problems.

Furthermore, as the range of use of the creeping discharge type ozonizer expands to, for example, refrigerators and passenger compartments, it has been required to reduce the installation space of the ozonizer.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a small creeping discharge type ozonizer having high cooling efficiency and low noise.

[Means for Solving the Problems]

The ozonizer of the present invention has a cylindrical blower type case having a cylindrical peripheral wall and side walls closing both ends thereof and having a suction port on the side wall and an air supply port opened on the peripheral wall, and a substantially ring plate shape. A plurality of creeping discharge parts made of an inorganic dielectric material, which are arranged side by side in the axial direction at predetermined intervals in the vicinity of the peripheral wall of the case, and discharge electrodes are disposed on the surface, and induction electrodes are embedded therein, It is characterized in that it includes a centrifugal blower type impeller that is rotatably mounted in a case and faces the creeping discharge portion.

As the inorganic dielectric material, for example, ceramics or glass can be used. In particular, a material having good heat resistance, high withstand voltage, and high specific induction is suitable.

The induction electrode may be completely embedded in the creeping discharge portion of the inorganic dielectric material, or may be exposed at a position apart from the discharge electrode.

[Action]

In the surface discharge type ozonizer of the present invention, the surface discharge portion is arranged in the vicinity of the inner peripheral surface of the peripheral wall of the centrifugal blower type case,
The airflow generated by the impeller of the centrifugal blower installed in the case swirls along the surface of the creeping discharge portion due to its kinetic energy and centrifugal force, and strongly cools the surface of this creeping discharge portion. That is, the air flow blows off and disturbs the air boundary layer adjacent to the surface of the creeping discharge portion, and strongly cools the surface of the creeping discharge portion heated by the creeping discharge. Further, the discharge electrode provided on the surface of the creeping discharge portion is also cooled. Further, nitrate, dust and water generated by the creeping discharge are also blown away by the high-speed air flow immediately after being generated by the impeller, and their accumulation on the surface of the discharge electrode is prevented.

Further, in this creeping discharge type ozonizer, the creeping discharge part is built in the centrifugal blower type case, so the blower and the creeping discharge part can be integrated, and the size can be reduced.

〔Example〕

One embodiment of the surface discharge type ozonizer of the present invention will be described with reference to FIGS. 1 and 2.

This rotary ozonizer has a cylindrical case 1 made of resin with one end opening consisting of a peripheral wall 11 and a side wall 12. Eight inlet ports 13 are radially formed in the side wall 12, and a tangential line is provided at one end of the peripheral wall 11. The air supply port 14 is opened in the direction, and the air supply duct 15 is installed in the air supply port 14.
Are combined. A disk-shaped resin lid 2 provided with ribs 21 is attached to the opening of the cylindrical case 1 to close the opening.

On the inner surface of the side wall 12, the output shaft 35 is aligned with the shaft center of the peripheral wall 11, and the motor 3 is fixed with a screw 31. From the motor 3, a resin pipe 32 is attached to the side wall 12 of the cylindrical case 1. The resin drive motor drive lines 33 and 34 are projected from the pipe 32 to the outside through the opened hole in parallel with the axis. The motor 3 is a single-phase induction motor of about 100 V, and the motor drive lines 33 and 34 are connected to a commercial AC power supply of 50 to 60 Hz. The output shaft 35 of the motor 3 extending to the lid 2 side is composed of a disc 41 extending at a right angle to the output shaft 35 and a lid 42 extending from the outer peripheral portion of the disc 41 in parallel with the axis, and has a sirocco fan shape. The impeller 4 made of metal having is fixed.

The inner surface of the peripheral wall 11 of the tubular case 1 is made of aluminum porcelain.
The ring-shaped creeping discharge parts 5 are arranged side by side at a predetermined interval in the axial direction. Inside the creeping discharge part 5, a ring-shaped induction electrode 51 is embedded, and the surface of the creeping discharge part 5 is A linear discharge electrode 52 is arranged in the. The discharge electrode 52 is arranged on the surface of the creeping discharge portion 5 in a bent shape in a ladder shape, and has a line width of 1 mm and a thickness of 0.1 mm. The induction electrode 51 and the discharge electrode 52 are made of tungsten.

Void between the creeping discharge part 5 and the outer edge of the blade 42 of the impeller 4
The gap 73 between the 70 and each creeping discharge portion 5 constitutes guide air for guiding the air flow generated by the impeller 4 to the air supply duct 15. In the vicinity of the air supply port 14 formed at one end of the peripheral wall 11 of the cylindrical case 1, in order to enable air supply,
These creeping discharge parts 5 are notched as shown in FIG.

The induction electrode 51 is connected to the high-voltage AC power supply unit 7 by the insulation-coated wiring 71
The discharge electrode 52 is connected to the other output end of the AC high-voltage power supply section 7 by the insulating coating wiring 72.

Next, the operation of this creeping discharge type ozonizer will be described.

When the motor 3 is rotated and an AC high voltage of about 10 KV and about 1 KHz is applied to the induction electrode 51, a creeping discharge is generated on the inner surface of the creeping discharge unit 5, and ozone is generated in the void 73. The surface of the creeping discharge section 5 is heated by this creeping discharge. Further, centrifugal air is blown from the intake port 13 to the air gaps 70 and 73 and then to the air supply duct 15 by the impeller 4, and the ozone generated in the air gaps 70 and 73 is transferred from the air supply duct 15 to the external target space. Sent out.

In this embodiment, the air flow generated by the impeller 4 is a high-speed turbulent flow, and swirls along the surface of the creeping discharge unit 5.

Therefore, the air boundary layer close to the surface of the creeping discharge section 5 is blown away and disturbed by this air flow generated by the impeller 4, and as a result, the heated surface of the creeping discharge section 5 is always fresh. It is strongly cooled by fresh cold air. In addition, nitrates and the like generated by creeping discharge are also blown outside by this air flow, and their accumulation on the discharge electrode 52 is prevented.

In addition, in this embodiment, in addition to the creeping discharge portion 5 provided on the inner peripheral surface of the cylindrical case 1, the impeller 4 is provided so as to surround the motor 3.
Since this is housed in the cylindrical case 1, the device can be further miniaturized.

Furthermore, according to the present embodiment, the creeping discharge area can be increased, the ozone generation capacity can be further increased, and the device can be downsized.

〔The invention's effect〕

As described above, in the device of the present invention, a plurality of creeping discharge parts are axially spaced at predetermined intervals in the vicinity of the inner peripheral surface of the peripheral wall of the centrifugal blower type case in which the air flow for ozone delivery swirls inside. Since they are arranged in parallel, it is possible to strongly cool the creeping discharge portion by the swirling air flow and prevent the accumulation of nitrate or the like on the surface of the creeping discharge portion.

It also prevents overheating of the creeping discharge part and improves its durability,
It also has the effect of reducing the production of nitrogen oxides.

Further, since the cooling performance is good for the reasons described above, it is possible to reduce the amount of air blow, and as a result of reducing the amount of air blow, it is possible to reduce air blow noise and air blow power consumption and also reduce the volume of the device.

Furthermore, the creeping discharge area can be increased without increasing the size of the device, and it is possible to manufacture a small-sized ozonizer having a strong ozone generating ability.

Due to the synergistic effect of the above advantages and the advantage that the creeping discharge ozonizer itself is originally low in noise, it is possible to provide a quiet and compact creeping discharge ozonizer in many applications.

[Brief description of drawings]

FIG. 1 is a sectional side view of a creeping discharge ozonizer according to an embodiment of the present invention, and FIG. 2 is a sectional front view thereof. 1 …… Cylindrical case (case) 2 …… Lid (case) 3 …… Motor 4 …… Impeller 5 …… Creeping discharge part 51 …… Induction electrode 52 …… Discharge electrode 7 …… AC high voltage power supply part ( (High voltage power supply)

Claims (2)

[Claims] 1. A centrifugal blower type case having a cylindrical peripheral wall and side walls closing both ends thereof and having an intake port on the side wall and an air supply port on the peripheral wall, and a substantially ring-shaped case. A plurality of creeping discharge parts made of an inorganic dielectric material, which are arranged in parallel in the vicinity of the peripheral wall of the case at a predetermined interval in the axial direction, and discharge electrodes are disposed on the surface, and induction electrodes are embedded inside the case. A creeping discharge type ozonizer, which is internally rotatably mounted in and includes a centrifugal blower type impeller facing the creeping discharge part. 2. A creeping discharge type ozonizer according to claim 1, further comprising a motor which is housed in the case so as to be surrounded by the impeller and which drives the impeller.