JP3514802B2 - Rotary ozone generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary ozone generating device, and in particular, is capable of efficiently producing and discharging ozone, while improving the reliability and safety of the entire apparatus. The present invention relates to a rotary ozone generator that can be used.

[0002]

2. Description of the Related Art Conventionally, as an ozone generator for generating ozone by utilizing corona discharge by applying a high voltage, there are known ozone generators which employ respective discharge methods such as creeping discharge, flat plate discharge and tubular discharge. ing.

As a rotary ozone generator, a rotary electrode is rotatably supported in a pressure vessel around which a fixed electrode is provided, and corona discharge is generated between the two electrodes as the rotary electrode is driven to rotate. A rotary ozone generator (Japanese Utility Model Publication No. 3-48179) has been proposed by the present applicant. In the proposed rotary ozone generator, fan blades are radially provided on the rotation base of a rotating electrode that is axially supported by a rotation shaft of a motor, and air for ozone generation is connected to the rotation driving of the motor by the fan blades. It is configured to be supplied into the housing and to discharge ozone from an outlet formed on one end surface of the housing.

[0004]

However, in the configuration proposed above, the air is supplied to the housing by the rotating fan blades, so that the amount of supplied air cannot be increased and the ozone generation efficiency is improved. Not only is it difficult to improve, but only high voltage is applied when the rotation electrode rotation stops due to discharge leakage to the motor's rotating shaft when high voltage is applied, or abrasion of the rotating shaft and motor failure. It did not deal with abnormal temperature rise, etc. when continued, and included a serious safety defect.

The present invention has been made in view of the above situation to solve the conventional drawbacks, and its purpose is to: (1) Leakage to the rotating shaft of the motor when a high voltage is applied. It is possible to prevent this in advance and stabilize the generation of ozone, and to suppress the leak to the outside of the pressure vessel to ensure the safety of the entire apparatus. (2) Improving reliability and safety by quickly detecting whether the supply air pressure is insufficient or excessive, and whether or not the rotation shaft of the motor is rotating, and switching the device to the stopped state without any delay. You can It is intended to provide a rotary ozone generator.

[0006]

In order to solve the problems, a first technical means adopted by the present invention is to attach a fixed electrode to a circumferential surface of a pressure vessel formed by closing both end surfaces of a tubular body. In addition, the rotary electrode of the electric motor, which penetrates one end face and projects into the pressure vessel, and the drive clamp of the air pump
The air pump discharges the air by applying a high voltage between the two electrodes that are coaxially supported by the shaft and are linked to the rotational drive of the rotary electrode.
In a rotary ozone generator that supplies air into a pressure vessel to generate ozone , the rotary electrode is formed by fitting a metal cylinder into a peripheral surface of a cylindrically shaped insulator, On the one end surface protruding from the rotary shaft of the electric motor, the expansion base end side of the shield formed in a funnel shape with ozone-resistant resin is loaded with the rotary shaft inserted, and the rotary electrode is mounted on the rotary shaft. When pivotally supported, the reduced tip side of the shield is
Configured to intervene in the interior of the rotating electrode, a second technical means, provided a negative pressure detector to the air inlet of the air pump, the air discharge port of the air pump providing the over-pressure detector Together with a rotation detector for detecting the rotation and non-rotation state of the rotary shaft, when driving the electric motor to rotate,
In each detection operation of the negative pressure and overpressure detector, the high voltage application between the fixed and rotating electrodes and the rotation drive of the electric motor are stopped, while the rotation detector detects the abnormal rotation of the electric motor. It is characterized in that the high voltage application between the fixed and rotating electrodes is immediately stopped.

[0007]

Therefore, according to the present invention, ozone can be efficiently generated and discharged, and the reliability and safety of the entire apparatus can be improved, and the ozone generation operation by the rotary ozone generator can be performed. It can be stabilized over a long period of time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail with reference to an embodiment shown in the drawings. 1 and 2, reference numeral 1 denotes a rotary ozone generator, and the rotary ozone generator 1
Is configured by connecting a diaphragm type air pump 4 and a pressure vessel 5 coaxially to a rotating shaft 3 of an electric motor 2, and controls each unit by supplying power from a control unit 6 and sending a control signal. It has become.

The air pump 4 is provided with an air inlet 8 provided with a negative pressure detector 7 and an air outlet 10 provided with an overpressure detector 9, and a drive crank 11 interlocked with the rotation of the rotary shaft 3. It is configured to drive a diaphragm (not shown) by moving up and down to pump air sucked from the air suction port 8 through the air filter 12 to the pressure container 5 through the supply pipe 13 connected to the air discharge port 10. ing. Further, the pressure vessel 5 is formed by surrounding a fixed electrode 15 on the inner peripheral surface of the cylindrical body 14, one end surface of which is provided with the high voltage shield plate 1.
6 is closed by an end plate 17 attached inside, and an ozone discharge port 18 is formed through the high voltage shield plate 16 and the end plate 17, and a rotary electrode 19 described later is provided.
The contactor 20 for supplying electric power to the end face 24 a of the above is provided so as to project toward the inside of the pressure vessel 5.

Further, as shown in FIGS. 3 (a) and 3 (b), the partition wall 21 with the air pump 4 is provided with a funnel-shaped shield 22 made of ozone-resistant resin in the form of a base 22a on the expanded base end side.
Is loaded with the rotary shaft 3 inserted,
At the tip of the rotary shaft 3, as shown in FIGS. 3C and 3D, a rotary electrode 19 is formed by fitting a stainless steel cylinder 24 around the peripheral surface of a cylindrical insulator 23. It is axially supported, and is configured to pivotally support the rotary shaft 3 so that the reduced tip end side 22b of the shield 22 intervenes inside the rotary electrode 19.

On the other hand, the rotary shaft 3 which pivotally supports the drive crank 11 on the side of the air pump 4 is shown in FIGS. 4 (a) and 4 (b).
, A plurality of notches 25a are formed on the peripheral surface of the disc 25,
A rotary plate 26 forming 25a ... Is coaxially supported and faces the peripheral area of the cutout portions 25a, 25a.
A rotation detector 27 including a light source (not shown) and a phototransistor is provided.

Next, the block diagram of the power supply and control system shown in FIG. 5 will be described in detail. In the figure, RL
1, RL2 and RL3 are relay groups for turning on and off the contacts ct1, ct2 and ct3 respectively connected to the AC input line, 28 is a DC conversion circuit, 29 is a main control circuit, 30 is a high voltage for the fixed electrode 15 and the rotary electrode 19. A high voltage circuit for supplying a voltage, 31 for a delay circuit, 32 for an alarm control circuit, 33 for a status display section, and a main control circuit 29 that receives power supply via the DC conversion circuit 28 is a rotary ozone generator. At the time of normal operation of No. 1, by turning on a start switch (not shown), a start signal is sent to the alarm control circuit 32, the start lamp of the status display section 33 is turned on, and
A contact closing signal is sent to the RL1 via the alarm control circuit 32, to the RL2 via the delay circuit 31, and directly to the RL3 to close the contacts ct1 to ct3. And the air pump 4, and among the above contacts, ct
2 is controlled by the delay circuit 30 so that the contacts ct1 and ct3 are closed after a required time from the closing of the other contacts ct1 and ct3.
The high pressure circuit 30 is controlled to start after the rotation of the electric motor 2 reaches a normal rotation state, and the alarm control circuit 32 includes a negative pressure detector 7 and an overpressure detector 9.
And the rotation detector 27 are connected, and receive the alarm signal sent from any one of the detectors to control the opening of the RL1, and disconnect the power supply to the high voltage circuit 30 and the electric motor 2 by opening the contact ct1. It is supposed to do. In addition,
34a and 34b are from the control unit 6 to the fixed electrode 15 and
A power supply line connected to the rotating electrode 19, and 35 is the rotating shaft 3.
Is a sealing material having a partition wall 21 and a high-voltage shielding function, and a discharge pipe 36 connected to the ozone discharge port 18.

In the above configuration, when a start switch (not shown) is turned on, a start signal is sent from the main control circuit 29 to each of the RL1 to RL1 to start the rotational driving of the electric motor 2. Along with the rotational driving of the electric motor 2, the drive crank 11 of the air pump 4 moves up and down to start supplying the sucked air into the pressure vessel 5 and, after a lapse of a predetermined time, from the high voltage circuit 30 to the fixed electrode. Application of high voltage to the rotating electrode 19 rotating with 15 is started, and ozone is generated by corona discharge between the both electrodes. The generated ozone is compressed by the subsequent supply air sent from the air pump 4 and is discharged from the ozone discharge port 18.

Among the corona discharges between the two electrodes, the discharge leak to the rotary shaft 3 of the electric motor 2 is suppressed by the shield 22 which covers the rotary shaft 3 and intervenes in the rotary electrode 19. As a result, the loss of discharge energy is reduced and the efficiency of ozone generation is relatively improved.
2, the sealing material 35 and the high voltage shield plate 1 in the pressure vessel 5
6 prevents the high voltage from leaking to the outside of the pressure vessel 5.

In a series of ozone generation driving as described above, when the intake air amount decreases due to clogging of the air filter 12, the negative pressure detector 7 is activated and an alarm signal is sent to the alarm control circuit 32 to cause RL1 to rise. Opened, contact c
By the opening of t1, the power supply to the high voltage circuit 30 and the electric motor 2 is immediately cut off, and an alarm is displayed on the state display section 33. Similarly, when the supply pipe 13 or the discharge pipe 36 is broken, the overpressure detector 9 operates and an alarm signal is sent to the alarm control circuit 32. The opening of the contact ct1 accompanying the opening operation of RL1 immediately cuts off the power supply to the high-voltage circuit 30 and the electric motor 2, and an alarm is displayed on the status display unit 33. Further, when the rotation of the rotating shaft 3 is stopped due to the abnormal rotation of the electric motor 2, the rotation detector 27 is activated and an alarm signal is sent to the alarm control circuit 32. The opening of the contact ct1 accompanying the opening operation of RL1 immediately cuts off the power supply to the high voltage circuit 30 and the electric motor 2, and an alarm is displayed on the status display unit 33. Therefore, various obstacle conditions associated with the ozone generation drive of the rotary ozone generator 1 can be discovered in advance, and safety can be ensured while maintaining a stable operating state of the device 1 for a long period of time. .

[0016]

In summary, according to the present invention, a fixed electrode is attached to the circumferential surface in the longitudinal direction of a pressure vessel formed by closing both end surfaces of a tubular body, and one end surface is penetrated into the pressure vessel. The rotating electrode of the protruding electric motor is driven by the rotating electrode and the air pump.
The dynamic crank is coaxially supported, and a high voltage is applied between the two electrodes that are linked to the rotational drive of the rotary electrode .
La discharge air is supplied to the pressure vessel, the rotary ozone generator for generating ozone, the rotating electrode, and fitting the metal tubular body on the peripheral surface of the insulator body formed in a cylindrical shape forming At the same time, the one end surface of the electric motor protruding from the rotary shaft is loaded with the expanding base end of the funnel-shaped shield made of ozone-resistant resin with the rotary shaft inserted, and the rotary electrode is attached. When pivotally supported on the rotating shaft, the reduction tip side of the shield is configured to intervene inside the rotating electrode,
It is possible to prevent ozone from leaking to the rotating shaft of the motor when a high voltage is applied, to stabilize ozone generation, to ensure the safety of the entire device, and to reduce the loss of discharge energy. The efficiency of ozone generation can be relatively improved. Furthermore, it provided a negative pressure detector to the air inlet of the air pump, with the air discharge port of the air pump providing the over-pressure detector, a rotation detector for detecting the rotation and non-rotation state of the rotary shaft Along with this, when the electric motor is rotationally driven, the negative pressure and overpressure detectors detect the high voltage applied between the fixed and rotating electrodes and the electric motor rotational drive is stopped, while the electric motor malfunctions. At the time of rotation, the detection operation of the rotation detector immediately stops the application of the high voltage between the fixed and rotating electrodes.Therefore, the supply air pressure is insufficient, the pressure is excessive, and the rotation shaft of the motor is rotating. Can be quickly detected and the driving state of the device can be switched to the stopped state without any delay, the safety of the rotary ozone generator can be ensured, and the stable operating condition of the device can be maintained for a long period of time. It can be,
The reliability can be greatly improved. And the like, which are extremely useful new effects.

[Brief description of drawings]

FIG. 1 is an overall plan view of a rotary ozone generator.

FIG. 2 is a cutaway sectional view of a main part of the same.

FIG. 3A is a front view of a shield. (B) is a right side view same as the above. (C) It is a front view of a rotating electrode. (D) It is a right side view same as the above.

FIG. 4A is a front view of a rotary plate. (B) is a right side view same as the above.

FIG. 5 is a block diagram showing a power supply and a control system.

[Explanation of symbols]

1 rotary ozone generator 2 electric motor 3 rotation axes 4 air pump 5 Pressure vessel 7 Negative pressure detector 8 Air inlet 9 Overpressure detector 10 Air outlet 11 drive crank 14 cylinder 15 Fixed electrode 19 rotating electrode 22 Shield 22a Expansion base end side 22b Reduction tip side 23 Insulator 24 Stainless steel cylinder (metal cylinder) 27 rotation detector

Claims (2)

(57) [Claims] 1. A rotary shaft of an electric motor, wherein a fixed electrode is attached to a circumferential surface of a pressure vessel formed by closing both end surfaces of a cylindrical body and which penetrates one end surface and projects into the pressure vessel. The rotating electrode and the driving crank of the air pump are coaxially supported, and the high voltage is applied between the two electrodes linked to the rotational driving of the rotating electrode to supply the discharge air from the air pump into the pressure vessel. , the rotary ozone generator for generating ozone
In the above, the rotary electrode is formed by fitting a metal cylinder on the peripheral surface of a cylindrically shaped insulator, and an ozone-resistant resin is formed on the one end surface protruding from the rotary shaft of the electric motor. When the expanded base end side of the shield formed in a funnel shape is loaded with the rotary shaft inserted, and when the rotary electrode is pivotally supported on the rotary shaft, the reduced tip end side of the shield is inside the rotary electrode. A rotary ozone generator characterized in that it is configured so as to intervene. Wherein providing the negative pressure detector to the air inlet of the air pump, the air discharge port of the air pump provided with an over-pressure detector, the rotation for detecting the rotation and non-rotation state of the rotary shaft A detector is also installed to stop the high-voltage application between the fixed and rotating electrodes and the rotation drive of the electric motor by the detection operation of each of the negative pressure and overpressure detectors when the electric motor is driven to rotate. 2. The rotary ozone generator according to claim 1 , wherein when the motor is abnormally rotated, the rotation detector detects the high voltage to immediately stop the application of the high voltage between the fixed and rotating electrodes.