JP2520840B2 - DC static eliminator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention applies positive and negative high voltages to positive and negative discharge electrodes,
The present invention relates to a DC static eliminator that generates positive and negative ions to eliminate static electricity from charged objects.

[0002]

2. Description of the Related Art As described in Japanese Patent Publication No. 3-1798, the present applicant has already provided an AC static eliminator using a high frequency transformer that can take out a sufficiently high voltage even if it is small. . This static eliminator uses a commercial AC power source as an original power source, a rectifier circuit that rectifies the AC voltage, a high-frequency oscillator circuit that is driven by the DC output of the rectifier circuit to self-oscillate, and a high-frequency output that boosts the high-frequency output. It is composed of a transformer and a discharge electrode unit to which a positive or negative high frequency output on the secondary side of the high frequency transformer is applied via a high voltage cable.

[0003]

However, according to this method, the place of use is limited to the place where the wiring equipment for the commercial AC power source is provided, and the power source section, the high voltage generating section and the discharging section are separated, and therefore the mobile unit is moved. It lacks in portability and portability, and can be made somewhat smaller than the one that used a large-sized low-frequency transformer in the past, but it is still an AC static eliminator, so there was a limit to miniaturization.

Therefore, a first object of the present invention is to integrate a power source section, a high voltage generating section and a discharge section into one unit, which can be miniaturized, and which is excellent in mobility, portability and installability, and a solar cell. As a power source, even if there is no commercial AC power source installation facility or DC power source facility, it can be widely used without being restricted to the installation location as long as it can receive light, and the power consumption in the internal circuit is reduced. It is an object of the present invention to provide a DC static eliminator capable of obtaining a voltage sufficient for static erasing with a solar cell having a small capacity even in low illuminance such as indoors.

A second object of the present invention is to generate positive ions and negative ions equally,
It is to make it possible to efficiently remove static electricity from both positive and negative charges by balancing the ion polarity.

[0006]

In order to achieve the first object, the DC static eliminator according to the present invention has a solar cell provided on the outer surface of a case and holds positive and negative discharge electrodes in the case. Further, in the case, a storage battery charged by the solar cell, an intermittent oscillation circuit that intermittently oscillates by applying a voltage from the storage battery, a transformer that generates an AC high voltage on the secondary side by the oscillation, and A rectifier circuit for rectifying an AC high voltage to generate a plus / minus DC high voltage and applying it to the plus / minus discharge electrodes is provided.

In order to achieve the second object, the rectifier circuit comprises a positive voltage doubler voltage rectifier circuit and a negative voltage doubler voltage rectifier circuit for applying positive and negative DC high voltages to the positive and negative discharge electrodes, respectively. The positive-side voltage doubler rectifier circuit converts the secondary side AC voltage of the transformer to n.
In order to positively rectify and amplify in stages, a diode and a capacitor are connected in series in n stages, and the negative side voltage doubler rectifier circuit reduces the secondary side AC voltage of the transformer by less than m.
It is configured by connecting m stages of diodes and capacitors in series to perform negative rectification and amplification in stages.

[0008]

The DC static eliminator according to the present invention has a single-piece structure in which the power source section, the high voltage generating section and the discharging section are held and integrated in one case. The electric charge generated by the solar cell on the outer surface of the case is stored in the storage battery, and the voltage causes the oscillation circuit to oscillate intermittently to convert direct current into alternating current.Then, the alternating voltage is boosted by the transformer and further rectified by the rectifier circuit. Then, it is converted into a direct current again and then applied as a high direct current voltage to the discharge electrode.

By the way, since sunlight has a high illuminance, sufficient power generation can be obtained for the solar cell. However, considering that the static eliminator is used indoors, its illuminance is incandescent lamp or fluorescent lamp. Low. For example, when the light source is an ordinary fluorescent lamp, even if the illuminance in its vicinity is about 5000 Lx,
Only about 500Lx of illuminance can be obtained on the desk. A large solar cell is generally required to obtain the power required for static elimination with this level of illuminance. In addition, when the oscillation circuit is oscillated by the DC voltage of the storage battery and converted into AC, if the oscillation circuit is continuously oscillated, the power consumption due to the oscillation increases, and the solar cell that is the power source also depends on the magnitude of the power consumption. It has to be a big one.

However, according to the present invention, in order to improve the boosting efficiency of the transformer, in addition to converting the direct current into the alternating current by the oscillating circuit, the oscillating circuit oscillates intermittently, so that the power consumption due to the oscillation can be small. Therefore, even if an incandescent lamp or a fluorescent lamp is used as a light source indoors, it is possible to obtain a voltage required for static elimination with a small solar cell.

The ions generated by the ionization by the plus and minus discharge electrodes tend to be slightly more negative ions than positive ions. If the number of amplification stages on the positive side in the voltage rectifier circuit is greater than that on the negative side, the high DC voltage applied to the positive and negative discharge electrodes will be higher on the positive side, and positive and negative ions will be generated equally. Will be able to.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an electric circuit configuration of a DC static eliminator according to the present invention, which includes a solar cell 1, a storage battery 2 such as a lead battery or a Ni-Cd battery, a high frequency intermittent oscillation circuit 3, a high frequency transformer 4, a positive voltage doubler rectification circuit 5, and The negative side voltage doubler rectifier circuit 6 and the positive and negative needle-shaped discharge electrodes 8 and 9 are included.

When the solar cell 1 receives light to generate power, the electric charge is stored in the storage battery 2 via the diode 7, and the stored voltage is applied to the high frequency intermittent oscillation circuit 3.
The high frequency intermittent oscillation circuit 3 is connected to the primary side of the high frequency transformer 4, and when the starting transistor 8 is turned on by the application of the DC voltage from the storage battery 2, the high frequency intermittent oscillation circuit 3 intermittently oscillates the high frequency. That is, the resistance R is increased (to reduce the base current of the transistor 10) for intermittent oscillation, and oscillation occurs when the amount of charge stored in the capacitor C1 is charged, and oscillation stops when the charged charge is discharged. . By repeating this, intermittent oscillation occurs. When the intermittent oscillation is performed in this manner, a high AC voltage is intermittently obtained on the secondary side of the high frequency transformer 4.

A positive side voltage doubler rectifier circuit 5 and a negative side voltage doubler rectifier circuit 6 are connected in parallel to the secondary side output terminal of the high frequency transformer 4. The structure and principle of a voltage doubler rectifier circuit are known, and by connecting a diode D and a capacitor C so as to be stacked in series, a high voltage DC voltage that is a multiple of the secondary voltage of the transformer can be obtained by the number of stacked stages. Also known as the Cockcroft-Walton circuit.

The positive-side voltage doubler rectifier circuit 5 has a diode D and a capacitor C connected in series in n stages (5 in the figure) to positively rectify and amplify the secondary voltage of the high frequency transformer 4 in n stages.
The negative-side voltage doubler rectifier circuit 6 has a diode D of the positive-side voltage doubler rectifier circuit 5 for negatively rectifying and amplifying the secondary voltage of the high-frequency transformer 4 into m stages less than n. It is configured by connecting a diode D and a capacitor C, which are in the opposite direction to, in series in m stages (4 stages in the figure).

The output terminal of the positive-side voltage doubler rectifier circuit 5 is connected to the positive-side electrode holder 12 via the resistor 11 because it is resistance-coupled to the positive-side discharge electrode 8, and also the negative-side voltage doubler rectifier circuit 6 is connected. The output end is the negative side discharge electrode 9
In order to make resistance coupling with, the same is connected to the negative electrode holder 12 via the resistor 11.

In such a configuration, electric power is stored in the storage battery 2 by the power generation by the solar cell 1, and the high frequency intermittent oscillation circuit 3 intermittently oscillates at the voltage to generate a high frequency output as shown in FIG. 2, for example. Then, this is boosted by the high frequency transformer 4 as shown in FIG. The output of the high frequency transformer 4 is n
At the same time as being positively rectified and amplified by the stages, the negative side voltage doubler rectification circuit 6 performs negative rectification and amplification by m stages. In this case, since the positive side voltage doubler rectifier circuit 5 has more stages than the negative side voltage doubler rectifier circuit 6, the voltage applied to the positive side discharge electrode 8 is the voltage applied to the negative side discharge electrode 9. It will be higher than that and ion balance can be achieved. Further, even if the high frequency intermittent oscillation circuit 3 intermittently oscillates, the output of the plus / minus voltage doubler rectifier circuits 5 and 6 is a voltage sufficient to eliminate the charge even at the intermediate point A of the oscillation interruption section, and therefore the charge is removed. There is no problem.

FIG. 3 is an external perspective view of the DC static eliminator, and FIG. 4 is a bottom view thereof. This DC static eliminator has a single-piece structure in which the power supply unit, the high voltage generation unit, and the discharge unit having the above-described circuit configuration are held in one case 13 and integrated.
That is, a large number of the solar cells 1 are arranged vertically and horizontally on the front surface of the case 13, for example, and the above-described circuit from the solar cell 1 to the plus / minus electrode holder 12 is a circuit board (not shown) in the case 13. No.), and the tips of the plus and minus discharge electrodes 8 and 9 face the holes 14 and 15 provided at the bottom of the case 13.

A fitting 16 is provided on the upper surface of the case 13 so that the DC static eliminator can be detachably installed and held at an appropriate place. The attachment 16 may be a widely used one such as a magnet, a double-sided adhesive tape, a hook-shaped metal fitting, or a screw. Moreover, the location of the attachment 16 is not limited to the upper surface of the case 13, and may be appropriately determined in consideration of the direction of light.

If the DC static eliminator is attached to an appropriate place where it is exposed to light by the fixture 16, the plus and minus discharge electrodes 8 and 9 are discharged as described above by the power generation by the solar cell 1, and the plus and minus are generated. Equivalent ions are generated.

[0021]

The DC static eliminator according to the present invention has the following effects. Since the power supply unit, the high voltage generation unit, and the discharge unit are held and integrated in one case, they are a single-piece structure, and thus are excellent in mobility and portability and are easy to handle.

Since the solar battery is used as a power source, it can be widely used without being limited to a specific installation location as long as it receives light even without a commercial AC power supply wiring facility.

The electric charge generated by the solar cell is stored in a storage battery, and the intermittent oscillation circuit is intermittently oscillated by the voltage to convert direct current into alternating current. Then, the alternating current voltage is boosted by a transformer and further rectified. Since DC is applied again to the discharge electrode, in order to increase the boosting efficiency of the transformer, in addition to converting DC to AC by the oscillator circuit, the oscillator circuit oscillates intermittently, so the power consumption due to the oscillation is small. I'm done. Therefore, even if an incandescent lamp or a fluorescent lamp is used as a light source indoors, a voltage required for static elimination can be obtained with a small solar cell.

Further, according to claim 2, in addition to the above, the following effect is further provided. Since the AC voltage on the secondary side of the transformer is rectified and amplified by a voltage doubler rectifier circuit consisting of a diode and a capacitor and applied to the positive and negative discharge electrodes, it is discharged even if a small high-frequency transformer with a small transformation capacity is used. A sufficiently high voltage can be applied to the electrodes, and the size can be further reduced.

Since the number of amplification stages of the voltage doubler rectifier circuit on the plus side is made larger than that on the minus side so that the DC voltage applied to the discharge electrode on the plus side becomes higher than that on the minus side, Negative ions can be generated equivalently. Therefore, it is possible to prevent the reverse charging of the charged object, and it is possible to efficiently remove the charge regardless of the polarity or the potential of the charged object due to the ionic polarity balance.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of an example of a DC static eliminator according to the present invention.

FIG. 2 is a diagram showing output waveforms of some circuits in the above.

FIG. 3 is an external perspective view of the DC static eliminator.

FIG. 4 is a bottom view of the same.

[Explanation of symbols]

 1 Solar battery 2 Storage battery 3 High frequency intermittent oscillation circuit 4 High frequency transformer 5 Positive voltage doubler voltage rectifier circuit 6 Negative voltage multiplier voltage rectifier circuit 8.9 Discharge electrode 13 Case D Diode C capacitor

Front Page Continuation (72) Inventor Kuniyoshi Ogawa 8-20-15-1003, Hino, Konan-ku, Yokohama-shi, Kanagawa (56) References JP-A-51-107435 (JP, A) JP-A-5-299191 (JP, A)

Claims (2)

(57) [Claims] 1. A solar cell is provided on the outer surface of a case, and positive and negative discharge electrodes are held in the case,
Further, in the case, a storage battery charged by the solar battery, an intermittent oscillation circuit that intermittently oscillates by applying a voltage from the storage battery, a transformer that generates an AC high voltage on the secondary side by the oscillation, and an AC Rectifies high voltage and adds
A DC static eliminator provided with a rectifier circuit for applying a negative DC high voltage to the positive and negative discharge electrodes. 2. The rectifier circuit comprises a positive voltage doubler rectifier circuit and a negative voltage doubler rectifier circuit for applying positive and negative DC high voltages to the positive and negative discharge electrodes, respectively. , A diode and a capacitor are connected in series in n stages to positively rectify and amplify the secondary side AC voltage of the transformer in n steps, and the negative side voltage doubler rectifier circuit is a secondary side AC voltage of the transformer. 2. The DC static eliminator according to claim 1, wherein the diode and the capacitor are connected in series in m stages so as to be negatively rectified and amplified in m stages smaller than n.