JPH0755804B2 - Rotary ozonizer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rotary ozone generator (hereinafter referred to as a rotary ozonizer), and more specifically, by simplifying a conventional device, it can be used in a particularly narrow environment. The present invention relates to a rotary ozonizer suitable for use.

[Prior Art] Japanese Patent Laid-Open No. 58-55312 discloses that a motor, an axial fan and a discharge electrode separately directly connected to a rotating shaft of the motor are provided inside a cylindrical case, and an inner surface of a peripheral wall of the cylindrical case is provided. Disclosed is a rotary ozonizer having a discharge electrode and an induction electrode facing each other. However, in this specification, the electrode coated with the dielectric layer is referred to as an induction electrode.

In this rotary ozonizer, ozone is generated by an air discharge between a rotating discharge electrode and an induction electrode surrounding it, and ozone is delivered by an air flow from an axial fan, and both electrodes are cooled and dried. Therefore, compared with a static ozonizer in which both electrodes are stationary, ozone generation efficiency and cooling efficiency are better, and harmful dust and water are less likely to accumulate on the surface of the discharge electrode, which is advantageous in that size reduction is easy.

[Problems to be Solved by the Invention] As the use of ozonizers has become more widespread in recent years, for example, in applications where the installation space is limited, such as in a hospital room sterilizer, indoor and refrigerator deodorizers, etc., Realization of a compact and high output ozonizer is desired.

However, in order to further reduce the size of the rotary ozonizer, it is necessary to arrange the electrodes, the fan, and the motor closer to each other, thereby achieving a small size and high output while ensuring electrical insulation and electrode cooling capacity. It wasn't easy.

The present invention has been made in view of such problems, and an object thereof is to provide a small-sized and high-power rotary ozonizer.

[Means for Solving the Problems] A rotary ozonizer of the present invention includes a motor having a rotor having a cavity formed therein, a rotary electrode disposed on the cavity side surface of the rotor, A stationary electrode, which is disposed in the cavity of the rotor and faces the rotating electrode at a predetermined interval, is connected between the rotating electrode and an inorganic material dielectric that covers one of the rotating electrode and the stationary electrode. And a high-voltage power supply unit and an ozone delivery fan connected to the rotating shaft of the motor.

It should be noted that, of the rotating electrode and the stationary electrode, the one having the inorganic material dielectric coating constitutes the induction electrode described below, and the other constitutes the discharge electrode.

[Operation] In the rotary ozonizer of the present invention, the electrode pair for ozone generation, one of which rotates with the rotor, is provided inside the rotor of the motor. As a result, in the rotary ozonizer of the present invention, these electrodes are provided. It is possible to save space for installing pairs.

That is, an AC high voltage having a predetermined waveform applied from the high voltage power source causes an air discharge between the electrodes, a creeping discharge occurs on the surface of the inorganic material dielectric, and ozone is generated.
The ozone delivery fan delivers the air containing ozone, and cools and dries the both electrodes and the inorganic material dielectric.

[Embodiment] Embodiment 1 An embodiment of the rotary ozonizer of the present invention will be described with reference to FIG. 1 and FIG.

A motor housing 1 of a three-phase squirrel-cage induction motor comprises a peripheral wall 11 and a side wall 12 at one end opening, and a peripheral wall around the opening.
A disk-shaped lid 2 is fitted in the cover 11. The motor housing 1 and the lid 2 are made of metal, and each has a plurality of vent holes 13 and 23 that are radially formed, and shaft grooves 14 and 24 that are formed in each central portion. On the inner peripheral surface of the motor housing 1, there is mounted a stator core 3 which is wound with a stator coil 30 and is laminated in a tubular shape with openings at both ends. The shaft grooves 14 and 24 of the motor housing 1 and the lid 2 are attached to the stator core 3. Both ends of the stationary shaft 5 are fitted and fixed in the shaft. A hollow squirrel cage rotor 6 is rotatably held on the stationary shaft 5 via ball bearings 52, 52. The squirrel cage rotor 6 and the inner peripheral surface of the stator core 3 are about 0.8 mm. The rotor core 61 has a cylindrical shape with openings at both ends of the rotor core 61 and side walls 63 and 63 whose outer peripheral portions are fitted to both ends of the rotor core 61.
Ball bearings 52, 52 are fitted in the central openings of 63, 63. On the outer peripheral surface of the rotor core 61 made of pure iron,
An aluminum rotor bar (not shown) and short-circuit rings (not shown) connected to both ends of the rotor bar are embedded. The side walls 63, 63 are formed of an outer peripheral ring portion 631, an inner peripheral ring portion 632, and a radial wing portion 633 connecting them, and the wing portion 633.
Has a twist and has a function of blowing air in the X direction of FIG. 1 by rotation.

In addition, a glass-lined cylinder 7 having openings at both ends is fixed to the inner peripheral surface of the rotor iron core 61, and inside the cylinder 7,
A tubular induction electrode 8 (see FIG. 2) is embedded. The induction electrode 8 has a wall thickness of about 0.1 mm, and the cylinder 7 covering it.
The glass lining has a thickness of about 0.5 mm to 1.5 mm.

Inside the squirrel-cage rotor 6, a cylindrical discharge electrode 9 having an opening 90 extending in the axial direction in the center is fitted in the stationary shaft 5, and the outer peripheral surface of the discharge electrode 9 is an alumina magnetic tube 7. A discharge space 200 of about 0.8 mm is separated from the inner peripheral surface of the.

Further, although not shown, a ring-shaped graphite electrode is fixed to the side wall 63 of the rotor 6, and a disk electrode having a central opening is fitted to the stationary shaft 5 so as to make sliding contact with the graphite electrode. The discharge electrode 9 is grounded through the disc electrode and the graphite electrode.

In addition, the above-mentioned induction electrode 8 is schematically shown as an insulating coating wiring 101.
Is connected to one output end of the high-voltage power supply unit 100, and the other output end of the high-voltage power supply unit 100 is grounded.

Next, the operation of this rotary ozonizer will be described. The rotor coil 6 is rotated by connecting electricity to the stator coil 30, and the induction electrode 8 has about 10
When an alternating high voltage of KV, about 1 KHz is applied, corona discharge is generated in the discharge space 200 between the induction electrode 8 and the discharge electrode 9, and a creeping discharge is generated on the surface of the tube 7 surrounding the induction electrode 8, resulting in As a result, ozone is generated in the discharge space 200. Further, as the rotor 6 rotates, the radial blades 633 of the side walls 63, 63 blow in the X direction in the figure, and the airflow flowing in from the ventilation hole 23 of the lid 2 is changed to the blades 633, 633 and the discharge space 200. , Flowing through the vent hole 13 of the motor housing 1, the generated ozone is delivered to the external target space, and the induction electrode 8, the discharge electrode 9,
The cylinder 7 is cooled and dried.

In the rotary ozonizer of this embodiment described above, the discharge electrode 9
Is placed in the hollow cavity of the rotor 6 and the induction electrode 8 is arranged on the rotor 6, so that the required volume can be significantly reduced.

Although the discharge electrode 9 has a cylindrical shape in this embodiment,
The surface of the discharge electrode 9 may be coated with a wear-resistant high-hardness metal to reduce wear due to discharge, and a groove or a protrusion may be provided on the outer peripheral surface of the discharge electrode 9 to help generate a sharp electric field. Good. Ventilation holes may be provided in the discharge electrode 9 in parallel with the stationary shaft 5.

Further, the discharge electrode 9 is not limited to the cylindrical shape, and may have various other shapes as long as it has an electrode portion that is separated from the cylinder 7 by a predetermined distance. For example, the discharge electrode 9 may be composed of a large number of electrode wire groups extending radially from the stationary shaft 5.

Embodiment 2 Another embodiment of the rotary ozonizer of the present invention will be described with reference to FIG.

This rotary ozonizer has the same configuration and structure as the rotary ozonizer of the first embodiment except for a cylinder 7 in which an induction electrode 8 is embedded and a discharge electrode 9.

The discharge electrode 9 is composed of six electrode members 91 to 96 sequentially fitted into the stationary shaft 5, and each of the electrode members 91 to 96 has a central cylindrical part fitted into the stationary shaft 5 and It is composed of a thin disk portion that extends radially outward from the central cylindrical portion.

Similarly, the cylinder 7 is also made up of five porcelain members 71 to 75 which are sequentially fitted to the inner peripheral surface of the rotor iron core 61.
Each of ~ 75 is composed of an outer ring part fitted in the inner peripheral surface of the rotor iron core 61, and a thin-walled centrally-opened disk part extending radially inward from the outer ring part. Has been done.

The induction electrode 8 is embedded in each disk portion of the cylinder 7 in total of 5
Each of the electrode members 81 to 85 has a disk shape with a central hole.

The electrode members 91 to 96 forming the discharge electrode 9 are electrically connected to each other, and the electrode members 81 to 85 forming the induction electrode 8 are also electrically connected to each other.

According to this embodiment, the induction electrode 8 and the discharge electrode 9 are opposed to each other at a predetermined interval in the direction parallel to the axis, which is advantageous in that the discharge space volume can be increased.

Also in this embodiment, a protrusion or a groove is provided on the surface of the discharge electrode 9, and the disc portion of the cylinder 7 or the disc portion of the discharge electrode 8 is opened.
The ventilation effect can be improved, and the disk portion of the cylinder 7 and the disk portion of the discharge electrode 8 can be deformed to have a shape having an air blowing function.

In addition, in each of the above-described embodiments, the rotating electrode referred to in the present invention is constituted by the induction electrode 8, but conversely, the rotating electrode may be used as the discharge electrode 9.

In addition, in each of the above-described embodiments, the rotor core 61 and the like are extended in the direction parallel to the rotation axis to extend the side wall 12 of the motor housing 1.
It is also possible to make the generated ozone not come into contact with the stator coil 30 or the like by making it close to the lid 2 or the lid 2, and by doing so, deterioration of the resin coating the stator coil 30 can be prevented.

Further, the discharge electrode 9 constituting the stationary electrode is not limited to the shape of each of the above-mentioned embodiments, and for example, as shown in FIG.
A large number of needle-shaped electrodes 90 may be arranged radially on the stationary shaft 5. This makes it possible to improve ventilation and cooling between the needle electrodes.

[Effects of the Invention] As described above, the rotary ozonizer of the present invention is provided with the rotating electrode provided inside the hollow rotor of the motor and the rotating electrode at a predetermined distance in the cavity inside the rotor. Since it has a stationary electrode, it can achieve a significantly smaller size and higher output than a conventional rotor.

[Brief description of drawings]

FIG. 1 is a sectional view of a rotary ozonizer according to an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view thereof. FIG. 3 is a sectional view of a rotary ozonizer according to another embodiment of the present invention. FIG. 4 is a sectional view showing a modified example of the discharge electrode 9. 1 ... Motor housing 2 ... Lid 3 ... Stator core 5 ... Stationary shaft 6 ... Rotor 7 ... Cylinder (dielectric of inorganic material) 8 ... Induction electrode (rotating electrode) 9 ... Discharge electrode ( Stationary electrode)

Claims (1)

[Claims] 1. A motor having a rotor having a cavity formed therein, a rotary electrode disposed on the cavity-side surface of the rotor, and a rotary electrode disposed in the cavity of the rotor, A stationary electrode facing the electrode with a predetermined gap, an inorganic material dielectric covering one of the rotating electrode and the stationary electrode, a high-voltage power supply connected between the electrodes, and a rotating shaft of the motor. A rotary ozonizer, comprising: an ozone delivery fan connected to the.