JPH10289796A - Static eliminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold the ion balance of positive and negative ions generated from a static eliminator. SOLUTION: A power source portion 1 and a power control device 3 are connected by a connecting wire 2, and the output side of the power source control device 3 is connected to a positive side high-voltage generating circuit 4 and a negative side high-voltage generating circuit 5. The positive side high- voltage generating circuit 4 is connected to a positive side electrode needle 6, and the negative side high-voltage generating circuit 5 is connected to a negative side electrode needle 7. Ions generated from positive and negative needles are insufflated to an object by a fan 8. The power source device 3 judges the polarity and intensity of the charging potential of the object, based on the signal of a detection resistor 10 connected to a ground wire 9, and controls the output voltage of the positive and the negative high-voltage generating circuits, so as to hold the ion balance of the object.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static eliminator for reducing the amount of charge of an object charged to a positive or negative charge to zero.

[0002]

2. Description of the Related Art In a liquid crystal manufacturing line or the like, if a target object is charged, dust or the like may adhere to the product, resulting in a defective product. When the small target object is charged, the products are sucked and come into contact with each other, so that the production line may be stopped. Therefore, where there is a need to suppress the generation of static electricity, a large number of static eliminators may be arranged in a limited space.

[0003] Static electricity is generated by positive or negative charges accumulated in a target object. The charged potential of the target object caused by the static electricity is obtained by measuring the surface potential of the target object with the ground as a reference potential. Has been determined. The principle of static elimination is that the charge accumulated in such a target object is poured into the ground, or the charge potential is neutralized by spraying ions of the opposite polarity to the accumulated charge to the target object. This is to make the accumulated charge approach zero.

By applying the above-described principle of static elimination, as a conventional static eliminator, a high DC voltage or a high AC voltage is applied to an electrode needle to generate positive and negative ions from the electrode needle. It is known that the blast is sprayed. FIG. 8 is a circuit diagram illustrating an example of a static eliminator using alternating current. In the figure, reference numeral 20 denotes a power supply unit, 21
Is a step-up transformer, 22 is an electrode needle, and f is a fan. The primary winding of the step-up transformer 21 is connected to a low-voltage power supply unit 20 such as a commercial frequency power supply.
An alternating high voltage of about 00 to 10000 volts is output and applied to the electrode needle 22, and positive and negative ions are generated alternately from the electrode needle 22.

Although the electrode needle 22 is arranged at a certain distance from the target object, ions are ejected by the repulsive force of positive and negative ions and adhere to the target object. If the ions generated from the electrode needles are difficult to adhere to the target object as it is due to the weak repulsion force, a fan f is provided to blow the ions generated from the electrode needles to the target object as shown in the figure. Sometimes. The positive and negative ions generated from the electrode needle 22 are sprayed on the target object by the fan f to neutralize the charged potential.

FIG. 9 is a circuit diagram showing an example of a DC type static eliminator. In the figure, 1 is a DC or AC low voltage power supply unit, 2 is a connection line, 3 is a power supply control circuit, 4 is a positive high voltage generation circuit, 5 is a negative high voltage generation circuit, 6 is a positive electrode needle, 7 is a negative electrode needle, 8 is a fan, and 9 is a ground wire.
As the positive high voltage generation circuit 4 and the negative high voltage generation circuit 5, for example, a voltage doubler rectification circuit including a capacitor and a diode is used. Also in this case, the fan is used only when the repulsion of the positive and negative ions is weak, and the fan may not be provided.

FIG. 10 is a circuit diagram showing an example of a voltage doubler rectifier circuit. FIG. 10A shows a positive high voltage generating circuit, and FIG. 10B shows a negative high voltage generating circuit. Is shown.
When such a voltage doubler circuit is used, if the number of units consisting of a diode and a capacitor is n with respect to the voltage input to the primary winding from the secondary side of the transformer, the DC voltage is n times the input voltage. High voltage is output.

The power supply control circuit 3 controls the voltages of the positive and negative high voltage generation circuits 4 and 5 and performs operation control such as starting and stopping the fan 8. A high DC voltage is applied to the positive and negative electrode needles 6 and 7 from the positive and negative high voltage generating circuits 4 and 5, respectively, and positive and negative ions are generated from the tips of the electrode needles. The fan 8 blows positive and negative ions generated from the electrode needles to the target object.

[0009]

In a static eliminator using alternating current or direct current, when the target object is charged, ions having a polarity opposite to that of the charged charge are blown to charge the target object. Neutralizing potential. In this case,
The neutralization device is required to generate the same amount of positive and negative ions so that the target object can be neutralized even if it is charged to either positive or negative polarity. For example, if the target object is positively charged, negative ions may be mainly sprayed. It does not mean that.

In order to prevent such a phenomenon from occurring, the static eliminator always generates the same amount of positive and negative ions to balance the ions, so that the charged potential of the target object is not biased to one polarity. Is required. Also, once the target object has been neutralized, it is necessary to always generate the same amount of positive and negative ions on the target object so that the target object is not charged to either positive or negative polarity. There is.

However, in the conventional static eliminator, the applied voltage and the like are controlled on the input side of the electrode needle so as to generate the same amount of positive and negative ions.
It does not detect how much positive and negative ions are actually generated from the tip of the electrode needle, and the static eliminator cannot always generate the same amount of positive and negative ions. Was.

Further, the static eliminator has a number of components such as a boosting transformer and a control device for boosting the power supply voltage to a high voltage, and includes a fan for blowing ions generated from the electrode needles to the target object. In the case of installation, since these components, including the fan, are arranged integrally in a case or the like, there is a problem that the entire apparatus becomes large and cannot be installed in a limited space.

Furthermore, since it is not possible to detect whether the target object is charged with any polarity of plus or minus and at what magnitude of potential, there is a problem in that the amount of ions generated by the static eliminator cannot be accurately controlled.

Further, since no means is provided for determining whether or not the target object has been neutralized, it is erroneously recognized that the static elimination process has been completed even though the target object has not been neutralized. There was a problem that this could cause product failure.

Furthermore, since there is no means for judging the deterioration or damage of the ion generating section such as the electrode needle, there is a problem that proper maintenance for generating predetermined ions from the static eliminator cannot be performed. .

The present invention has been made in view of the above problems, and has as its object to provide a static eliminator configured to always generate the same amount of positive and negative ions from the tip of the electrode means so as to maintain ion balance. Things.

Further, the static eliminator has a configuration in which the components can be divided and stored so that the booster can be installed in a limited space without changing the capacity of the step-up transformer in order to generate a predetermined amount of positive and negative ions. It is intended to be provided.

Still another object of the present invention is to provide a static eliminator configured to be able to accurately detect the polarity of the plus or minus polarity and the magnitude of the potential of the target object.

Still another object of the present invention is to provide a static eliminator configured to display a state of static elimination of a target object and allow an operator to determine whether the static elimination has been performed normally.

It is still another object of the present invention to provide a static eliminator configured to notify deterioration or damage of an ion generator and perform proper maintenance of the static eliminator.

[0021]

In order to achieve the above object, according to the present invention, a static eliminator is provided with a high voltage generating means for boosting a power supply voltage to a predetermined high voltage, and an output voltage of the high voltage generating means. Is supplied to generate positive and negative ions from the tip, detecting means for detecting the difference between the amount of positive and negative ions generated from the electrode means, and generating from the electrode means by a signal from the detecting means. It is characterized in that control means for controlling the output voltage of the high voltage generating means is provided so that the positive and negative ion amounts are equal.

Further, the detecting means and the control means are separated into one unit, and the high voltage generating means and the electrode means are separated into the other unit and housed in separate cases, and both units are connected by a cable. It is characterized by having.

Further, the detecting means is constituted by a sensor arranged in close proximity to the target object, and the state of charging of the target object is displayed by the sensor output, and the output voltage of the high voltage generating means is controlled. And

Further, a display means for displaying a signal obtained by the detection means is provided so that an operator can determine the state of static elimination of the target object.

Further, an alarm is provided when the detection value obtained by the detection means is smaller than a predetermined range, and an alarm means is provided for notifying deterioration or damage of the ion generator of the static eliminator. .

The present invention is also directed to a static eliminator having a fan for blowing ions generated from the electrode means to a target object. The static eliminator having such a fan is also applicable to the static eliminator of the present invention. Each feature is provided.

According to this feature of the present invention, the output voltage of the boosting means is controlled by detecting the difference between the positive and negative ion amounts generated from the electrode means. Can be generated, and the charged potential of the target object can be brought close to zero while maintaining the ion balance.

Also, since the high-voltage components of the static eliminator and other components are separated and housed in separate units, these units are arranged in consideration of the installation space with respect to the target object. it can. Cables that connect each unit are of low voltage specification, and need only have a small wire diameter. Also, even if the cable is routed at the work site, there is no danger of giving an electric shock or the like to the worker.

Further, a sensor for detecting the polarity and magnitude of the charging potential is arranged at a position close to the target object, and the state of charging of the target object is displayed by the detection signal. You can check the status. Further, since the high-voltage generating means is controlled in accordance with the state of charge of the target object detected by the sensor, the target object can be rapidly neutralized.

Furthermore, since the configuration is such that the state of static elimination of the target object can be displayed, it is possible to avoid the occurrence of a product failure caused by erroneously recognizing that the static elimination processing has been completed while the target object is not neutralized.

Further, since the alarm means is provided so as to notify the deterioration or damage of the ion generating section, the maintenance of the static eliminator can be properly performed.

Each of these functions can also be obtained in a static eliminator provided with a fan for blowing ions generated from the electrode means to a target object.

[0033]

Embodiments of the present invention will be described below. FIG. 11 is a circuit diagram illustrating the principle of the present invention. In the figure, positive and negative ions generated from the electrode needles Y1 and Y2 provided on the output side of the high voltage generation unit X of the static eliminator are blown toward the target object by the fan Z. At this time, the positive and negative ion flows flowing in the air can be considered as a current between the high-voltage generating part X and the ground. That is, the current i ₁ flowing from the high voltage generation unit X toward the ground represents a negative ion current, and the current i ₁ flowing from the ground toward the high voltage generation unit X is
₂ represents a positive ion current.

According to the present invention, from the correlation between the ion current and the current, if the amount of the positive and negative ions generated from the static eliminator is the same, the current is neutralized and the current becomes zero. It was done. In the present invention, the direction and magnitude of the current flowing between the power supply unit of the static eliminator and the ground are detected, and the power supply unit is controlled so that the current is reduced to zero. Under the control of the power supply unit, a predetermined number of positive and negative ions are always generated from the static eliminator.

FIG. 1 is a circuit diagram showing an example of a static eliminator using direct current according to the present invention. In the figure, 1 is a DC or AC power supply unit, 2 is a connection line, 3 is a power control device, 4
Is a positive high voltage generating circuit, 5 is a negative high voltage generating circuit, 6 is a positive electrode needle, 7 is a negative electrode needle, and 8 is a fan provided when necessary when spraying ions onto a target object. Although installed at a position close to the needle, the installation of a fan can be omitted when ions adhere to the target object only by the repulsive force of positive and negative ions. 9 is a ground line. Such a configuration is the same as that of the conventional static eliminator described with reference to FIG. 8, but the present invention is characterized in that a detection resistor 10 for detecting positive and negative ions is connected to the ground line 9. The power supply control device 3 is provided with a display device O and an alarm device P whose operations will be described later.

As described above, the neutralization of the target object is performed by spraying ions having a polarity opposite to the charged polarity. At this time, the flow of the ions is formed with the ground as a reference potential. Therefore, when the amount of generated ions of either polarity of the positive or negative ions formed by the static eliminator is larger than the amount of generated ions of the other polarity, the difference value is the current of the ground line 9. It is proportional to the size. For this reason, by measuring the magnitude and direction of the current of the ground line 9, it is possible to determine how much positive and negative ions and how much ions are generated from the static eliminator.

In the present invention, the detection resistor connected to the ground line is used to determine which polarity of ions generated from the static eliminator is large, so that the generated amounts of positive and negative ions are always equal. Is controlled. In other words, in the state of ion balance in which the generation amounts of the positive and negative ions are equal, the neutralization is performed, the potential between the ground and the static eliminator becomes zero, and the current flowing through the detection resistor 10 is not detected. Therefore, the value of the current flowing through the ground line is fed back to the power supply control circuit 3 to control the voltages of the positive-side and negative-side high-voltage generating circuits, thereby achieving ion balance of the static eliminator.

FIG. 2 is a circuit diagram of a part of a power supply control circuit 3 showing a specific example for controlling such ion balance of the present invention. In the figure, reference numeral 1 'denotes a high-voltage generator for boosting the voltage of the power supply unit to a predetermined high voltage. As shown in the figure, a current-voltage conversion circuit 11, which converts a current value detected by a detection resistor 10 connected to a ground line into a voltage signal,
An amplifier 12 for amplifying the signal of the current-voltage conversion circuit 11;
A control circuit 14 is provided which supplies a signal for controlling the output voltage of the high voltage generating circuits 4 and 5 on the positive and negative sides according to the signals of the D conversion circuit 13 and the A / D conversion circuit 13.

FIG. 3 is a timing chart showing an example of a pulse-like voltage waveform output from the positive and negative high voltage generating circuits 4 and 5 according to a control signal formed by the control circuit 14. FIG. 3A shows a voltage waveform for generating positive ions at time ta in the period T.
(B) is a voltage waveform for generating negative ions at time tb in the period T. The amplitude value of the voltage waveform is selected to be, for example, 6000V. In this example,
The pulse widths ta and tb are controlled in accordance with the positive and negative polarities of the signal detected by the current-voltage conversion circuit 11 and the magnitude thereof to maintain ion balance.

In the above example, the positive and negative electrode needles 6 and 7 are attached to the positive and negative high voltage generating circuits 4 and 5, respectively. The configuration of the section is not limited to this, and the positive and negative high voltage generating circuits may be provided with an electrode means such as a long object such as a thin wire or a member having a projection to form an ion generating section.

In FIG. 1, the power supply control device 3 is provided with a display device O. This display device O detects the state of the positive and negative ions generated from the electrode needles 6 and 7 as described in FIG. The signal of the detecting means is displayed. The signal of the detecting means can be considered to be a signal of the above-mentioned characteristic of the ion generating unit and a signal of the ion adhesion state of the target object.

That is, if the ions adhering to the target object are balanced with positive and negative polarities, the signal of the detection means becomes zero, but if the amount of adhering ions of either polarity is large, The signal of the detection means does not become zero.
By monitoring the data displayed on the display device O, the operator can determine the state of static elimination of the target object. Therefore, by controlling the power supply control device 3 so that the signal of the detection means becomes zero, The completion of static elimination can be confirmed.

The power control device 3 is provided with an alarm device P. This alarm device P generates an alarm for positive and negative ions generated from the electrode needles 6 and 7 when the amount of generated ions is smaller than a predetermined range due to wear of the electrode needles, adhesion of dust, and the like. It is. The alarm device monitors the voltage-current characteristics of the positive and negative high voltage generating circuits 4 and 5 and compares it with a reference value to generate an alarm signal if the comparison value is out of a certain range. Can be. By providing such an alarm device, the operator can appropriately perform maintenance of the static eliminator.

FIG. 4 is an explanatory view of an example in which the components of the static eliminator of the present invention are unitized and housed in a case. As shown in the figure, the unit A includes a DC or AC power supply unit 1, a connection line 2, a power supply control circuit 3, a ground line 9, and a detection resistor 1.
0 is placed and stored in the case. In the unit B, a positive high voltage generating circuit 4, a negative high voltage generating circuit 5, a positive electrode needle 6, a negative electrode needle 7, and a fan 8 are arranged and housed in a case. The units A and B are connected by a cable C having connectors at both ends. When a commercial frequency power supply is used as the power supply section, the power supply section 1 can be arranged separately from the unit A.

The static eliminator is required to be as small as possible depending on the space or the like depending on the place where the target object is present. There is a limit to miniaturization. When the static eliminator is divided into two units as shown in FIG. 4, only the unit B in which the positive electrode needle 6, the negative electrode needle 7, and the fan 8 necessary for generating and spraying ions are arranged is separated from the unit A and subjected to an object. Since it can be installed in the vicinity of the object, the problem of space can be solved as in the case where the static eliminator is downsized. In the case of a static eliminator without a fan, only the high voltage generator is housed in the unit B.

In addition, since the high voltage generator is arranged in the unit B, the cable C wired from the unit A on the low voltage side can have a small diameter, and a low voltage is applied in the cable. Therefore, even if it is routed on the floor or the like, the worker does not have a risk of causing an accident such as an electric shock and the safety of the worker can be achieved.

FIG. 5 is a circuit diagram for explaining another embodiment of the present invention. In this example, the sensor 16 is arranged at a position close to the target object 15 instead of connecting the detection resistor to the ground line. The charge polarity and the magnitude of the charge voltage of the target object 15 are detected by a sensor 16, and a detection signal is supplied to an A / D converter 18 via a display device 17. Since the charge state of the target object is displayed on the display device 17 based on the detection signal of the sensor 16, the operator can check the charge state of the target object.

The detection signal converted into a digital signal by the A / D converter 18 is input to the power supply control device 3 so that a large amount of ions having a polarity opposite to the polarity charged to the target object are blown onto the target object. Then, control is performed so as to temporarily increase the output voltage of one of the positive-side or negative-side high-voltage generating circuits 4 and 5, and the target object is rapidly discharged. When the voltage of the high-voltage generation circuit decreases and reaches a steady value, the operation mode shifts to a normal operation mode without a sensor, and the charged state of the target object approaches zero while maintaining the ion-balanced state.

FIG. 6 is a characteristic diagram illustrating the charge elimination of the target object according to the example of FIG. The solid line in the figure shows the output voltage characteristic of the high voltage generation circuit when a sensor is used, and the broken line shows the output voltage characteristic of the high voltage generation circuit when a normal sensor is not used. As shown in the figure, when the output voltage of the high voltage generation circuit is controlled as described above using a sensor,
The output voltage decreases rapidly from a temporary large value and converges to a steady value.

If the voltage doubler generation circuit described with reference to FIG. 10 is used as the DC high voltage generation circuit, for example, when a high voltage of 10,000 V is output from the high voltage generation circuit, an output voltage of 5000 V for each of the positive and negative sides is output. However, such a high voltage requires a unit composed of a large number of capacitors and diodes due to the withstand voltage of the diode, which is a component of the voltage doubler circuit, resulting in an increase in cost. There is.

For this reason, it is conceivable to apply a high voltage generating circuit that alternately applies positive and negative pulse-like high voltages to the electrode means as shown in the circuit diagram of FIG. In the figure, E is a DC power supply, S is a switch, OS is an oscillator, DC / DC is a converter, CO is a capacitor, and N is an electrode needle.

FIGS. 13A and 13B are timing charts for explaining the operation of the circuit diagram of FIG. Oscillator O
When S opens and closes the switch S at a predetermined cycle T, a pulse-like voltage having an amplitude of, for example, 2 V is output from the converter DC / DC, and a terminal a on the input side of the capacitor CO is shown in FIG. Such a voltage having a pulse-like waveform having an amplitude of 2 V is applied. From the output terminal b of the capacitor CO, FIG.
Positive and negative pulse-like output voltages having waveforms whose maximum amplitudes are + V and -V as shown in FIG.

Therefore, a positive and negative pulse voltage having a waveform as shown in FIG. 13B is applied to the electrode needle N, and positive and negative ions are generated alternately from the electrode needle. As described above, the high voltage generating circuit having the configuration as shown in the circuit diagram of FIG. 13A can also be applied to the static eliminator of the present invention.

Although the above example is an example of a static eliminator using a high DC voltage, the present invention can also be applied to a static eliminator using a high AC voltage. FIG. 7 is a circuit diagram illustrating an example of a static eliminator using a high AC voltage. In the figure, 20 is an AC power supply, 21 is a step-up transformer, 22 is an electrode needle, 23 is an A / D converter, 24 is a DC bias power supply, 25 is a detection resistor, 26 is a detection circuit, 27 is a control circuit, and 28 is a control circuit. It is a voltage control device. From the output side of the step-up transformer 21, a high-voltage alternating current obtained by boosting the power supply voltage to a predetermined voltage is obtained.
A predetermined voltage is applied to the electrode needle via the voltage control device 28. From the tip of the electrode needle, positive and negative ions are output alternately.

In this example, since the detection resistor 25 is connected to the ground wire of the secondary winding of the step-up transformer via the DC bias power supply 24, the detection resistor 25 is connected to the electrode needle 22.
Positive and negative DC currents corresponding to the ions generated from the flow. In the same manner as the static eliminator using the DC high voltage in FIG. 1, the difference between the positive and negative ion amounts generated from the electrode needles of the static eliminator can be determined by the detection circuit 26, and the difference is set to zero. The voltage controller 28 is controlled by the signal of the control circuit 27 to maintain the ion balance. The detection circuit 26 can detect the difference between the positive and negative ion amounts by, for example, counting the number of positive and negative DC pulses during a certain period.

In the AC type static eliminator, since the voltage is supplied from the power source in positive and negative cycles,
In principle, the same amount of positive and negative ions are generated alternately at the electrode needle 22. However, the same amount of positive and negative ions are not always generated from the electrode needle 22 due to the influence of offset or the like. Therefore, a voltage controller 28 is provided between the step-up transformer 21 and the electrode needle 22 to adjust the voltage level, thereby adjusting the amount of positive and negative ions generated from the electrode needle.

In the AC type static eliminator, the means for alternately outputting positive and negative ions may be configured to use a long object such as a thin wire or a member having a projection instead of the electrode needle. Can also. In addition, a configuration may be adopted in which a fan that blows ions toward an object is provided.

Further, in an AC type static eliminator, FIG.
A display device O for displaying the positive and negative polarities and amounts of ions attached to an object, similarly to the DC type static eliminator described in (1).
And an alarm device P for generating an alarm when the amount of ions output from the electrode needle is out of a predetermined range.

[0059]

As described above, according to the present invention, the static eliminator is provided with a high voltage generating means for boosting the power supply voltage to a predetermined voltage, a positive voltage and a negative voltage supplied from the output end of the high voltage generating means. An electrode means for generating ions, a detecting means for detecting a difference between the amount of positive and negative ions generated from the electrode means, and an output voltage of the high voltage generating means controlled by a signal from the detecting means to generate from the electrode means. And a control means for making the number of positive and negative ions equal to each other. As described above, since the output voltage of the high voltage generating means is controlled by the signal from the detecting means for detecting the difference between the positive and negative ion amounts generated from the electrode means, the positive voltage is always supplied from the tip of the electrode means. , The same number of ions can be generated, and the charged potential of the target object can be made close to zero.

Further, since the high-voltage components and other components are separated and housed in separate units, these units can be arranged with respect to the target object in consideration of the installation space. Cables that connect each unit are of low voltage specification, and need only have a small wire diameter. Also, even if the cable is routed at the work site, there is no danger of giving an electric shock or the like to the worker.

Further, a sensor for detecting the polarity and magnitude of the charging potential is arranged in proximity to the target object, and the state of charging of the target object is displayed by the detection signal. Can be confirmed. Further, since the output voltage of the high-voltage generating means is controlled according to the charging state of the target object detected by the sensor, the target object can be rapidly neutralized.

Further, by providing a fan at a position close to the electrode means, ions generated from the electrode means can be sprayed on the target object to effectively remove the electricity.

Further, since the display means for displaying the state of static elimination of the target object is provided, the operator can check whether the static elimination of the target object has been completed or not. It is possible to prevent a failure of the product or the like caused by erroneously recognizing that the static elimination is completed.

Further, if the ion generating section is deteriorated or damaged, an alarm means for notifying the deterioration or damage is provided, so that proper maintenance of the static eliminator can be performed.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a static eliminator according to a preferred embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of ion balance control of the static eliminator according to the present invention.

FIG. 3 is a timing chart of the static eliminator according to the present invention.

FIG. 4 is an explanatory diagram showing a configuration of another embodiment of the static eliminator according to the present invention.

FIG. 5 is a circuit diagram showing a configuration of another embodiment of the static eliminator according to the present invention.

FIG. 6 is a characteristic diagram in the embodiment of FIG.

FIG. 7 is a circuit diagram showing a configuration of another embodiment of the static eliminator according to the present invention.

FIG. 8 is a circuit diagram of a conventional static eliminator.

FIG. 9 is a circuit diagram of a conventional static eliminator.

FIGS. 10A and 10B are circuit diagrams illustrating an example of a voltage doubler generation circuit.

FIG. 11 is a circuit diagram illustrating the principle of the present invention.

FIG. 12 is a circuit diagram of a static eliminator using a pulsed high voltage generation circuit.

13A and 13B are timing charts for explaining the operation of an example using the configuration of the circuit diagram of FIG. 12;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply part 2 Connection line 3 Power supply control device 4 Positive high voltage generation circuit 5 Negative high voltage generation circuit 6 Positive electrode needle 7 Negative electrode needle 8 Fan 9 Ground wire 10 Detection resistor

Claims (14)

[Claims] 1. A high voltage generating means for increasing a power supply voltage to a predetermined voltage, an electrode means supplied with an output voltage of the high voltage generating means to generate positive and negative ions from a tip, Detecting means for detecting the difference between the positive and negative ion amounts, and control for controlling the output voltage of the high voltage generating means so that the positive and negative ion amounts generated from the electrode means are equalized by a signal from the detecting means. A static eliminator characterized by comprising means. 2. A structure in which the detection means and the control means are separated into one unit, and the high voltage generation means and the electrode means are separated into the other unit and housed in separate cases, and both units are connected by a cable. The static eliminator according to claim 1, wherein: 3. The detecting means is constituted by a sensor arranged in close proximity to the target object, and displays the charging state of the target object based on an output signal of the sensor and controls the output voltage of the high voltage generating means. The static eliminator according to claim 1, wherein: 4. A high-voltage generating means for boosting a power supply voltage to a predetermined voltage, an electrode means supplied with an output voltage of the high-voltage generating means to generate positive and negative ions from a tip portion, A fan that blows ions to the target object, a detection unit that detects a difference between the positive and negative ion amounts generated from the electrode unit, and the same number of positive and negative ion amounts generated from the electrode unit by a signal from the detection unit. And a control means for controlling the output voltage of the high voltage generating means. 5. The detecting means and the controlling means are separated into one unit, and the high voltage generating means, the electrode means and the fan are separated into the other unit and housed in separate cases, and both units are connected by a cable. The static eliminator according to claim 4, wherein the static eliminator is configured to perform the following. 6. The detecting means comprises a sensor arranged in close proximity to the target object, and displays the charging state of the target object by an output signal of the sensor and controls the output voltage of the high voltage generating means. The static eliminator according to claim 4, wherein: 7. A high voltage generating means for boosting a power supply voltage to a predetermined voltage, an electrode means supplied with an output voltage of the high voltage generating means to generate positive and negative ions from a tip, and an electrode means for generating positive and negative ions. Detecting means for detecting the polarity and charge amount of the charging voltage of the target object based on the difference between the positive and negative ion amounts, and display means for displaying a signal obtained by the detecting means. apparatus. 8. A configuration in which the detection means and the display means are separated into one unit, and the high voltage generation means and the electrode means are separated into the other unit and housed in separate cases, and both units are connected by a cable. The static eliminator according to claim 7, wherein: 9. A high voltage generating means for boosting a power supply voltage to a predetermined voltage, an electrode means supplied with an output voltage of the high voltage generating means to generate positive and negative ions from a tip portion, and an electrode means for generating ions from the electrode means. A fan for blowing ions to the target object, detecting means for detecting the polarity and amount of charging voltage of the target object based on the difference between the positive and negative ion amounts generated from the electrode means, and a signal obtained by the detecting means. A static eliminator comprising a display unit for displaying. 10. The detecting means and the display means are separated into one unit, and the high voltage generating means, the electrode means and the fan are separated into the other unit and housed in separate cases, respectively.
The static eliminator according to claim 9, wherein both units are connected by a cable. 11. A high-voltage generating means for boosting a power supply voltage to a predetermined voltage, an electrode means supplied with an output voltage of the high-voltage generating means to generate positive and negative ions from a tip, and an electrode means for generating ions. A static eliminator comprising: a detector for detecting the amount of positive and negative ions; and an alarm for generating an alarm when the detection value obtained by the detector is smaller than a predetermined range. 12. A structure in which the detecting means and the alarming means are separated into one unit, the high voltage generating means and the electrode means are separated into the other unit and housed in separate cases, and both units are connected by a cable. The static eliminator according to claim 11, wherein: 13. High voltage generating means for boosting a power supply voltage to a predetermined voltage, electrode means supplied with an output voltage of the high voltage generating means to generate positive and negative ions from the tip end, and generating from the electrode means. A fan that blows ions to the target object, a detection unit that detects positive and negative ion amounts generated from the electrode unit, and an alarm unit that generates an alarm when a detection value obtained by the detection unit is smaller than a predetermined range. And a static eliminator comprising: 14. The detecting means and the alarming means are separated into one unit, and the high voltage generating means, the electrode means and the fan are separated into the other unit and housed in separate cases, respectively.
The static eliminator according to claim 13, wherein both units are connected by a cable.