JPH08337Y2 - Ozone generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a device for generating ozone by an electric discharge between a rotary electrode having a blowing function and a fixed electrode.

[Prior Art] This type of device is disclosed in Japanese Utility Model Laid-Open No. 63-30319. In this conventional device, a conductor is attached to a conductive fan that is rotated by a motor, and a fixed electrode is attached to the casing side, so that discharge is performed between the rotating dielectric and the fixed electrode. Ozone is generated by this discharge, and this generated ozone is sent to the outside from the casing by the blowing function of the fan that constitutes the rotary electrode.

[Problems to be Solved by the Invention] However, power supply to the dielectric for performing this discharge is performed via a conductive contactor that contacts the dielectric by a spring action, and such a structure has a structure. Becomes complicated. Also, it is necessary to increase the spring action moderately to ensure the electrical connection between the dielectric and the contact, but this increases the contact resistance between the contact and the dielectric, and Power loss for rotating the electrode is large. In addition, since the dielectric and the contactor are in sliding contact with each other while receiving the spring action, the contactor is abraded, resulting in a problem of life.

An object of the present invention is to provide an ozone generator capable of saving power and improving the life while achieving reliable power supply in spite of its simple structure.

[Means for Solving the Problems] Therefore, in the present invention, the output shaft of the motor for rotating the rotary electrode and this bearing are made of a conductive material, and the rotary electrode is electrically connected to the output shaft and Providing a connecting part on the fixed side of the electrically connected fixed part or bearing,
The connection and the high voltage power supply were electrically connected.

[Operation] The rotating electrode is connected to the conductive bearing through the conductive output shaft of the motor. Further, a connecting portion is provided on the fixed portion electrically connected to the bearing or on the fixed side of the bearing, and the connecting portion and the high voltage power source are electrically connected. Therefore, when a high voltage is applied by the high voltage power source, a high voltage difference is generated between the rotating electrode side and the fixed electrode side, and a discharge occurs between the two. There is no problem in terms of power loss and wear between the output shaft and bearing due to the bearing's original support action, and electrical contact between the output shaft and bearing is reliable from the bearing's original mechanical contact action. Is. Therefore, power saving and long life can be achieved while achieving reliable power supply, and the power supply structure has a simple structure with no new movable contact other than the bearing portion.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS.

1 is a motor, and its casing 2 is made of a conductive material. An output shaft 3 is rotatably supported by a pair of ball bearings 4 and 5 in a conductive casing 2.
Each ball bearing 4,5 is a recess 2a on the inner surface of the casing 2,
It is fitted in 2b. Inner ring 4a of each ball bearing 4,5,
5a is fitted and connected to the recesses 2a and 2b, and outer rings 4b and 5b are fitted and connected to the output shaft 3. Inner rings 4a, 5a, outer rings 4b, 5b, balls 4c, 5c joined to both inner and outer wheels 4a, 5a, 4b, 5b, and output shaft 3 are all made of conductive material, and casing 2 and output shaft 3 are ball bearings. It is electrically connected via 4,5.

1a is a stator fixed to the casing 2 side, and 1b is a rotor supported on the output shaft 3.

A sirocco fan 6 is fixed to the protruding end of the output shaft 3 protruding from the casing 2, and a silicon rubber ring-shaped dielectric 7 is fixed to the blade portion 6a of the sirocco fan 6. The sirocco fan 6 is made of a conductive material, and the dielectric 7 is electrically connected to the output shaft 3 via the sirocco fan 6.

The sirocco fan 6 and the derivative 7 are surrounded by an insulating cylindrical cover 8 supported by the casing 2. An intake port 8a is provided on the end wall of the cover 8 facing the sirocco fan 6, and an exhaust port 8b is provided on the peripheral wall. The intake port 8a is within the rotation radius of the blade portion 6a of the sirocco fan 6. It is set at the position corresponding to the area. Therefore, when the fan 6 rotates in the direction of arrow R in FIG.
It flows into the cover 8 from 8a and is discharged from the exhaust port 8b.

A pair of insulative columns 9 and 10 are erected on the inner surface of the end wall of the cover 8 facing the motor 1, and an arc-shaped fixed electrode 11 is erected and supported between the columns 9 and 10. There is. Fixed electrode 11
Is disposed near the dielectric 7 on the side of the exhaust port 8b, and an appropriate discharge gap is provided between the dielectric 7 and the fixed electrode 11.

A high voltage side electric wire 13 of an AC high voltage power supply 12 is electrically connected to the fixed electrode 11 via a connection terminal 14 screwed. Further, the conductive casing 2 functions as a fixing part electrically connected to the ball bearing 4, and the low voltage side electric wire 15 of the AC high voltage power source 12 is connected to the casing 2 via a connection terminal 17 fixed by a screw 16. The rotary electrodes 6 and 7 are grounded via the output shaft 3, the ball bearings 4,5, the casing 2, the connection terminal 17 and the low voltage side electric wire 15. That is, the sirocco fan 6 and the dielectric 7 serve as a low-voltage side rotating electrode, and when a high voltage is applied between the electric wires 13 and 15, the high-voltage side fixed electrode 11 and the low-voltage side rotating electrodes 6 and 7 of the dielectric 7 are provided. A discharge occurs between and. As a result, the air passing through the discharge gap is ozoned and sent out from the exhaust port 8b.

In the structure in which the ball bearings 4 and 5 are used as a part of the high voltage circuit in order to use the sirocco fan 6 and the dielectric 7 as rotating electrodes, extra rotating resistance is given to the rotating electrodes 6 and 7 for electrical connection. No matter what, the power for rotating the rotating electrodes 6, 7 is the minimum necessary because of the original rotation supporting function of the ball bearings 4, 5. Therefore, there is no problem of power loss, and no problem of sliding contact wear between the rotating electrodes 6 and 7 and the fixed portion side. In terms of structure, the motor 1 is not different from the conventional one, and the sirocco fan 6 and the dielectric 7 function as a rotating electrode only by screwing the low-voltage side electric wire 15 to the conductive casing 2. The reason why the casing 2 can be made conductive is that the low-voltage side electric wire 15 is grounded to ensure electrical safety. Moreover, due to the original bearing function of the ball bearing 4, the contact between the inner and outer races and the ball is reliable. Therefore, if both are made of a conductive material, the electrical connectivity is also reliable, and the configuration in which the ball bearings 4 and 5 are part of the high voltage circuit is extremely simple and has a long life as an electrical connection structure.

Further, in this embodiment, since the intake port 8a can be largely provided on the end wall of the cover 8 opposite to the side where the cover 8 is connected to the motor 1, the efficiency of intake into the cover 8 is very good.

As the lubricating grease for the ball bearings 4 and 5, it is preferable to use a grease having a good arc resistance that does not cause an abnormality even when an arc is generated in the bearing portion, for example, silicon grease or one having a high carbon content.

Of course, the present invention is not limited to the above-mentioned embodiment. For example, as shown in FIG. 3, the connection electrode 18 is electrically connected to the outer ring 4b as the fixed side of one ball bearing 4, and the connection electrode 18 is also connected. An embodiment is also possible in which the connection terminal 17 of the low-voltage side electric wire 15 is fixed to 18 with a screw 16 and the casing 2 is made of an insulating material. With such a configuration, the ball bearing 4 side can be set to the high pressure side.

A roller bearing may be used as the bearing instead of the ball bearing.

[Effects of the Invention] As described in detail above, the present invention makes the output shaft of the motor for rotating the rotating electrode and this bearing made of a conductive material, electrically connects the rotating electrode to the output shaft, and Since the connecting portion is provided on the fixed side of the electrically connected fixed portion or the bearing and the connecting portion and the high voltage power source are electrically connected, power loss and wear between the output shaft and the bearing and further electrical There is no problem with regard to contact as well, and thus, an excellent effect that power saving and long life can be achieved while achieving reliable power supply despite a simple structure is achieved.

[Brief description of drawings]

FIGS. 1 and 2 show an embodiment embodying the present invention, FIG. 1 is a side sectional view, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. FIG. A casing 2 as a fixed part, ball bearings 4 and 5 as bearings, an outer ring 4b as a fixed side, a sirocco fan 6 and a dielectric 7 forming a rotating electrode, a fixed electrode 11, an AC high-voltage power supply 12.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-62-153104 (JP, A) JP-A-1-179702 (JP, A) Practical application Sho-63-69133 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An apparatus for generating ozone by electric discharge between a rotary electrode having a blowing function and a fixed electrode, wherein an output shaft of a motor for rotating the rotary electrode and this bearing are made of a conductive material, and the output shaft is An ozone generator in which a rotating electrode is electrically connected, and a fixed portion electrically connected to the bearing or a fixed portion of the bearing is provided with a connecting portion, and the connecting portion and a high-voltage power source are electrically connected.