JP2003173857A - Ion generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ion generator of which, generated quantity of negative ion is stabilized by controlling discharge current. <P>SOLUTION: The ion generator is composed of a power source part 1; an ion generating part 2 comprising a high voltage generation part 2a generating high voltage pulsating current proportional to the control voltage inputted from the power source part, a discharge electrode 2b impressing high voltage pulsating current generated at the high voltage generation part, and a short- circuit detection part 2c detecting the short-circuit of the discharge electrode and outputting detection signal; a grounded opposite electrode 3 to be discharged from the discharge electrode; and a control part 5 turning on/off the output of the power source part. A discharge current detection part 4 is arranged between the opposite electrode and ground, and as it is constructed so that the control part controls the output voltage of the power source part so that the discharge current detected at the discharge current detection part 4 becomes constant, a stable discharge current is obtained, and stable negative ion can be generated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion generator capable of confirming discharge and stably generating ions.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, an ion generator has a power supply unit 1 for generating a control voltage and a negative high voltage proportional to a control voltage input from the power supply unit 1 via a control terminal a. A high voltage generator 2a that generates a pulsating voltage and a discharge electrode 2b that applies a negative high voltage pulsating voltage that is generated by the high voltage generator 2a and a short circuit between the discharge electrode 2b are detected to detect a detection signal b. A negative ion generator 2 composed of a short-circuit detector 2c which is output from the discharge electrode 2 which is grounded.
The counter electrode 3 is discharged from b, and the control unit 5 turns on / off the output of the power supply unit 1 based on the detection signal from the short-circuit detection unit 2c of the negative ion generator 2. By the way, it is known that the amount of negative ions generated is proportional to the discharge current discharged from the discharge electrode 2b to the counter electrode 3. However, in the above configuration, by adjusting the control voltage to control the negative high voltage pulsating voltage,
Although it is possible to detect the short circuit and stop the generation of high voltage to protect the negative ion generator, it is not possible to know how much discharge current is flowing due to the generated high voltage, but also the amount of negative ions generated. It was not possible to control it stably.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an ion generator capable of stabilizing the amount of negative ions generated by controlling the discharge current. There is.

[0004]

In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by providing a power supply section for generating a control voltage and a high voltage for generating a high voltage pulsating current proportional to the control voltage input from the power supply section. An ion generator comprising a generator and a discharge electrode for applying a high-voltage pulsating voltage generated by the high-voltage generator and a short-circuit detector for detecting a short circuit between the discharge electrode and outputting a detection signal, and the discharge electrode In an ion generator including a grounded counter electrode that is further discharged and a control unit that turns on / off the output of the power supply unit based on a detection signal from the short circuit detection unit, a discharge is generated between the counter electrode and ground. An ion generator is provided with a discharge current detection unit for detecting a current, and the control unit controls the output voltage of the power supply unit so that the discharge current detected by the discharge current detection unit is constant.

The discharge current detecting section is an ion generating device including a current detecting resistor provided between the counter electrode and the ground and a voltage detecting section for detecting a voltage generated across the resistor.

An ion generator in which the discharge current detecting section includes a current detecting resistor provided between the counter electrode and ground and a rectifying section for rectifying an AC component of a voltage generated across the resistor. There is.

An ion generator is provided with a discharge circuit for discharging the electric charge of the capacitor forming the rectifying unit when the discharge current detecting unit is stopped.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The ion generator according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit block diagram showing an embodiment of the ion generator according to the present invention. In FIG. 1, reference numeral 1 is a power supply unit that generates a control voltage. Reference numeral 2 is a negative ion generator, and the negative ion generator 2 is a high voltage generator 2a capable of controlling a negative high voltage pulsating voltage output by a control voltage from the power source 1 input from a control terminal a. And a discharge electrode 2b for applying the minus high-voltage pulsating current voltage generated by the high voltage generator 2a, and a short-circuit detector 2c for detecting a short circuit of the discharge electrode 2b and outputting a detection signal from the detection terminal b. It consists of. Although not shown, the high voltage generator 2a obtains a negative high pulsating current voltage by rectifying the switching voltage obtained by switching the oscillation signal by the switching circuit by using a switching transformer. . Reference numeral 3 is a counter electrode discharged from the discharge electrode 2b. Reference numeral 4 denotes a discharge current detection unit that outputs a detection voltage corresponding to the discharge current.
Is a resistor 4a for current detection which is inserted in series between the counter electrode 3 and the ground, and a capacitor 4b which cuts off the DC component of the pulsating voltage generated at both ends of the resistor 4a and extracts an AC voltage. A rectifier 4c and a capacitor 4d that rectify this AC voltage and output a detection voltage, and a discharge circuit 4e that discharges the electric charge accumulated in the capacitor 4d when the operation is stopped. Reference numeral 5 is a control unit composed of a microcomputer, and the control unit 5 is a short circuit detection unit 2c of the negative ion generator 2.
The output of the power supply unit 1 is turned on / off based on the detection signal from
While turning off, the detection voltage corresponding to the discharge current detected by the discharge current detection unit 4 is input, and the output voltage of the power supply unit 1 is controlled so that the detection voltage corresponding to the discharge current becomes constant. There is. In this embodiment, the DC component of the pulsating current voltage generated at both ends of the current detecting resistor 4a is cut to detect the AC voltage, and the AC voltage is rectified to obtain a positive voltage. Alternatively, the pulsating current voltage generated at both ends of the resistor 4a may be directly rectified to take out a negative voltage. In this case, it goes without saying that the capacitor 4b in FIG. 1 becomes unnecessary and the direction of the rectifier 4c is reversed.

The operation of the above arrangement will be described below. When a control voltage is input from the power supply unit 1 to the negative ion generator 2, a negative high pulsating current voltage corresponding to the control voltage is generated by the high voltage generation unit 2a and applied to the discharge electrode 2b, A discharge is started from the discharge electrode 2b to the counter electrode 3. When the discharge to the counter electrode 3 is started, the discharge current detector 4 detects the discharge current and outputs a detection voltage corresponding to the discharge current. This detection voltage is input to the control unit 5, and the output voltage of the power supply unit 1 is controlled so that the detection voltage becomes a constant voltage. Further, even if the discharge electrode 2b is short-circuited, the short-circuit detection unit 2c detects this as in the conventional case, and a detection signal is input to the control unit 5 from the detection terminal b, and the control unit 5 causes the power supply unit 1 to operate. Is turned off, the output of the high voltage generator 2a of the negative ion generator 2 is stopped, so that the destruction due to the overcurrent can be prevented.

As described above, the discharge current detection unit outputs the detection voltage corresponding to the discharge current, and the control unit controls the control voltage output from the power supply unit 1 so that the detection voltage becomes constant. The controlled control voltage is input to the control terminal a of the negative ion generator 2, and the high-voltage pulsating voltage corresponding to the control voltage generated by the high-voltage generator 2a is applied to the discharge electrode 2
Since it is applied to b and discharged to the counter electrode 3 to generate a stable discharge current, stable negative ions can be generated.

[0011]

As described above, according to the ion generator of the present invention, the power supply section for generating the control voltage and the high voltage for generating the high pulsating current voltage proportional to the control voltage input from the power supply section. An ion generator comprising a discharge electrode for applying a high-voltage pulsating voltage generated by the high-voltage generator and a short-circuit detector for detecting a short circuit between the discharge electrode and outputting a detection signal, and the discharge In an ion generator comprising a grounded counter electrode discharged from an electrode and a control unit that turns on / off the output of the power supply unit based on a detection signal from the short circuit detection unit, between the counter electrode and ground. Since the discharge current detection unit for detecting the discharge current is provided and the control unit controls the output voltage of the power supply unit so that the discharge current detected by the discharge current detection unit is constant, a stable discharge current is obtained. Is obtained, Can be generated boss was negative ions.

[Brief description of drawings]

FIG. 1 is a circuit block diagram showing an embodiment of an ion generator according to the present invention.

FIG. 2 is a circuit block diagram showing a conventional ion generator.

[Explanation of symbols]

1 power supply 2 negative ion generator 2a High voltage generator 2b discharge electrode 2c Short circuit detector 3 Counter electrode 4 Discharge current detector 4a resistance 4b, 4d capacitors 4c rectifier 4e discharge circuit 5 control unit

Claims (4)

[Claims] 1. A power supply section for generating a control voltage, a high voltage generation section for generating a high voltage pulsating voltage proportional to a control voltage input from the power supply section, and a high voltage pulsation generated by the high voltage generation section. An ion generator composed of a discharge electrode for applying a voltage and a short-circuit detector for detecting a short circuit of the discharge electrode and outputting a detection signal, a grounded counter electrode discharged from the discharge electrode, and the short-circuit detector An ion generator comprising a control unit for turning on / off the output of the power supply unit based on a detection signal from a discharge current detection unit for detecting a discharge current between the counter electrode and the ground, and the control unit An ion generator, wherein the output voltage of the power supply unit is controlled so that the discharge current detected by the discharge current detection unit becomes constant. 2. The discharge current detecting section comprises a current detecting resistor provided between the counter electrode and the ground, and a voltage detecting section for detecting a voltage generated across both ends of the resistor. The ion generator according to claim 1. 3. The discharge current detection unit includes a current detection resistor provided between the counter electrode and the ground, and a rectification unit that rectifies an AC component of a voltage generated across the resistance. The ion generator according to claim 1, which is characterized in that. 4. The ion generator according to claim 3, wherein the discharge current detector is provided with a discharge circuit that discharges the electric charge of the capacitor forming the rectifier when the operation is stopped.