JPH06181087A - Electric field device - Google Patents

Abstract

PURPOSE:To generate minus ion and ozone by only one device. CONSTITUTION:A discharge electrode 12 and an opposite electrode 14 are faced mutually via a ceramics plate. Thereby, minus ion can effectively be generated if ac high voltage is applied to both electrodes 12, 14. By an ac high voltage generating circuit 50, the ac high voltage applied across both electrodes 12, 14 are switched between the most suitable voltage for generating the minus ion and the most suitable voltage generating ozone. Thereby the minus ion and the ozone are generated selectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric field device capable of selectively generating negative ions and ozone.

[0002]

2. Description of the Related Art Ionized air has the effect of maintaining the freshness of food, and has been conventionally used in refrigerators or food storages. Further, at present, it is recognized that ionized air has a good effect on the human body, and it has come to be used in air cleaners and the like. It has been found that the effect of this ion is mainly caused by the negative ion. For this reason, the ion generator uses, as its electrodes, a planar electrode on one side and a needle-shaped metal electrode on the other side that directs the planar electrode, and a negative electrode is provided on the needle-shaped electrode side (ion generation electrode). A positive potential was applied to the surface electrode side to generate negative ions. Further, ozone has an effect of deodorizing and sterilizing, and is used in an air cleaner or the like. The device for generating ozone is a silent discharge ozone generator in which a dielectric is interposed between a discharge electrode and a counter electrode to provide a space gap, or a linear electrode and a planar electrode are provided via a dielectric. A creeping discharge type ozone generator provided integrally was used to generate ozone by applying an alternating high voltage between both electrodes of the generator.

[0003]

Both negative ions and ozone have the above-described unique effects, and some air cleaners have a function of generating both negative ions and ozone. Conventionally, in such a case, an ion generator and an ozone generator have to be separately provided. For this reason, the size of the apparatus is increased, and it is also a cause of increasing the cost of the space cleaning device. The present invention has been made to solve the above problems,
The object is to provide an electric field device capable of generating negative ions and ozone by itself.

[0004]

In order to achieve the above object, the electric field device of the present invention comprises a discharge electrode and a counter electrode arranged through a space gap, and an AC high voltage for applying an AC high voltage between both electrodes. A voltage generating circuit, a ceramic dielectric plate is integrally attached to the surface of the counter electrode facing the discharge electrode, and a high voltage potential applied between both electrodes of the AC high voltage generating circuit is applied. It is characterized by being variable. Further, as another aspect, the electric field device of the present invention has a discharge electrode and a counter electrode arranged via a space gap, and an AC high voltage generating circuit for applying an AC high voltage between both electrodes. A ceramic dielectric plate is integrally attached to a surface of the electrode facing the discharge electrode, and a plurality of lengths of the space gap between the discharge electrode and the counter electrode are present.

[0005]

In the electric field device configured as described above, since the discharge electrode and the counter electrode are opposed to each other via the dielectric ceramic plate, negative ions are efficiently generated even when an AC high voltage is applied to both electrodes. it can. Further, the alternating high voltage generated between the electrodes is switched by the alternating high voltage generating circuit between the optimum potential for generating negative ions and the optimum potential for generating ozone, thereby selecting negative ions and ozone. To be generated. As another aspect of the electric field device of the present invention, the space gap between the discharge electrode and the counter electrode is switched between an optimum length for generating negative ions and an optimum length for generating ozone, thereby allowing negative ions and ozone to be generated. Generate selectively.

[0006]

Embodiments of the present invention will be described with reference to the drawings. First, an electric field device 10 according to an embodiment of the present invention will be described with reference to FIG. The electric field device 10 includes a casing 20, a discharge electrode (ion generating electrode) 12 attached to a front surface 20 a of the casing 20, a counter electrode 14, and a discharge electrode 12 disposed on the casing 20 and facing the discharge electrode 12. The high voltage power supply unit 18 for accommodating an AC high voltage generating circuit for applying an AC high voltage between the electrode 14 and the electrode 14. The discharge electrode 12 having a plurality of sawtooths 12a has a counter electrode 14
At the same time, it has a function of generating ozone by electric discharge and a function of negatively ionizing air by the applied AC high voltage. The discharge electrode 12 has a counter electrode 14 and a sawtooth 1
A pin 26 is attached to the front surface 20a of the housing so that the 2a is oriented. The discharge electrode 12 is formed by punching a nickel plate or etching.
On the other hand, the counter electrode 14 has a bottom surface portion 2 extending from the housing 20 toward the front surface in order to protect it from an external impact.
It is fixed at 0b. The counter electrode 14 has a structure in which a metal is embedded in the dielectric ceramics, and the manufacturing method will be described in detail later.

In this embodiment, the space gap length between the tip of the discharge electrode 12 and the counter electrode 14 is set to 4 mm, and the voltage of the AC high voltage generating circuit is set to a potential suitable for generating negative ions. By switching between potentials suitable for generating ozone, both negative ions and ozone can be generated. The switching of the potential will be described later in more detail.

Here, a method of manufacturing the counter electrode 14 of this embodiment, which is formed by integrally molding ceramics and metal, will be described with reference to FIG.
Will be described with reference to. First, use alumina powder with MgO
2% (weight ratio, all the same below) CaO 2%, SiO ₂
Mix 4% and ball mill for 50 to 80 hours,
After wet pulverization, dehydration and drying are performed. Then, add 3% methacrylic acid isobutyl ester and 3% butyl ester to this powder.
%, Nitrocellulose 1%, dioctyl phthalate 0.
5% was added, and trichloroethylene, n was added as a solvent.
Add butanol and mix in a ball mill to make a free flowing slurry.

After degassing under reduced pressure, it is poured into a flat plate and gradually cooled, and the solvent is diffused to form high purity alumina green sheets 28 and 30 having a thickness of 0.5 mm. On the other hand, in order to form the metal planar electrode 32, the tungsten powder is slurried in the same manner to prepare a metallized ink. This is printed on the alumina green sheet 30 with a tungsten metallizing ink by a normal screen printing method to form a planar electrode 32. Then, the alumina green sheets 28 and 30 are thermocompression bonded.
At this time, the surface electrode 32 is formed on the alumina green sheet 30.
A through hole 34 for drawing out the terminal is formed in advance. The layered material formed in this manner is treated at 1400 ° C to 160 ° C.
The counter electrode 14 is completed by firing in a non-oxidizing atmosphere at 0 ° C.

In the example described in connection with FIG. 2, which shows another example of the counter electrode in FIG. 3, the planar electrode 32 made of metal was constructed so as to be embedded in the ceramics. The metal-made planar electrode 38 is attached to the lower surface of the ceramic plate 36, and the lower surface of the planar electrode layer 38 is exposed to the atmosphere. This counter electrode has a one-layer structure in which a sheet electrode 38 made of metal is printed and fired on an alumina green sheet, but this can also be formed on the fired alumina by a so-called secondary meta method.

Next, the circuit configuration of the AC high voltage generating circuit 50 will be described with reference to FIG. The AC high voltage generation circuit 50 of the present embodiment is connected to a commercial AC power supply 45 of 60 Hz or 50 Hz, and is necessary between the discharge electrode 12 and the counter electrode 14 to generate a potential required for negative ion generation or ozone generation. The applied potential is selected and applied. This AC high voltage generation circuit 50 defines a voltage applied to a capacitor C1 or C2 composed of a resistor R1, a Zener diode ZD1, a transistor TR1 and a diode D3, and a diode that energizes a half wavelength of the AC voltage in the forward direction. D1, a relay S1 for passing a current passing through the diode D1 to a capacitor C1 (for ozone generation) or C2 (for negative ion generation) having a different capacity, and a capacitor C
1 and C2 connected to the transformer 44 and the capacitor C
It mainly consists of a thyristor SCR1 for discharging the electric charge charged in 1 or C2, and a gate circuit including a resistor R2, a capacitor C3 and a resistor R3 for giving a gate signal to the thyristor SCR1. Then, the secondary side terminal 44a of the transformer 44 is connected to the discharge electrode 12 via a lead wire (not shown), and the secondary side terminal 44b is connected to the counter electrode 14 via a lead wire to output between both electrodes. It is designed to apply voltage.

The operation of the AC high voltage generating circuit 50 will be described first on the assumption that the relay S1 selects the ozone generating capacitor C1 having a larger capacity. 10
The commercial voltage of 0V is resistor R1, Zener diode ZD
1. A potential is regulated by a regulation circuit composed of the transistor 1, the transistor TR1 and the diode D3, which is energized by a half wavelength of the AC voltage in the forward direction through the diode D1 and charges the capacitor C1 through the relay S1. Then, when the voltage is in the opposite direction to the diode D1, the capacitor C3 on the gate circuit side is charged, and when this voltage reaches a value that triggers the gate of the thyristor SCR1,
The thyristor SCR1 is energized, and a current starts to flow from the charged capacitor C1 to form a current path composed of the capacitor C1, the thyristor SCR1 and the primary side of the transformer 44, whereby the secondary side of the transformer 44 for ozone generation. A relatively high voltage is generated.

On the other hand, in the AC high voltage generating circuit 50, the relay S1 has a small-capacity negative ion generating capacitor C.
When switched to the 2 side, the capacitor C 2 is charged with a relatively small electric charge via the diode D 1, and thereby a relatively low voltage (AC) is generated to generate negative ions on the secondary side of the transformer 44. High voltage). The relay S1 is automatically switched between the capacitor C1 side and the capacitor C2 side by a control circuit (not shown) at a preset time period for generating a desired amount of negative ions and ozone. Further, the relay S1 is configured so that it can be fixed to the contact on the desired side by the user.

Next, another embodiment of the AC high voltage generating circuit 50 will be described with reference to FIG. In the above-described embodiment, either the capacitors C1 or C2 having different capacities are selected by the relay S1 to generate two kinds of voltages on the secondary side of the transformer 44. On the other hand, the AC high voltage generation circuit 150 of the present embodiment has a resistor R1 and a Zener diode ZD connected to a commercial AC power supply of 100V.
2, ZD3, a transistor TR1, a relay S2, and a circuit that regulates the voltage applied to a capacitor C4 that is composed of a diode D3. One of the Zener diodes ZD2 and ZD3 of this voltage regulation circuit is selected by the relay S2, and the The voltage applied to the capacitor C4 is made variable by changing the voltage applied to the base.
As a result, a relatively high potential for ozone generation and a relatively low potential for negative ion generation are generated on the secondary side of the transformer 44. And
This relay S2 is configured to switch the Zener diodes ZD2 and ZD3 by a control circuit (not shown) in the same manner as the relay S1 of the AC high voltage generating circuit 50 described above.

Next, the operation of the electric field device 10 of this embodiment will be described with reference to the graph of FIG. 6 showing the relationship between the amount of negative ions and ozone generated and the discharge voltage (applied voltage). FIG. 6 shows the amount of negative ions generated and the amount of ozone generated when the space gap length between the discharge electrode and the counter electrode is set to 4 mm and the applied voltage to both electrodes is changed. As can be seen from the figure, more negative ions are generated when the discharge voltage is 3 to 5 KVPP, and both negative ions and ozone are generated when the discharge voltage is 5 to 13 KVPP.
More ozone is generated at 3 to 15 KVPP. As the above results show, negative ions, negative ions, ozone, and ozone can be selectively generated by the applied voltage.

In the present embodiment, the capacity of the ozone generating capacitor C1 of the AC high voltage generating circuit 50 described above is set so that the voltage generated on the secondary side of the transformer 44 is 14 KVPP, and for generating negative ions. The capacity of the capacitor C2 is set to 5KV for the voltage generated on the secondary side of the transformer 44.
The measurement test was performed by setting it to be PP. As a result, when the relay S1 is connected to the ozone generating capacitor C1 side, 10,000 negative ions / cm ³
Below, 0.8 ppm or more of ozone could be generated. When the relay S1 is connected to the negative ion generating capacitor C2 side, the negative ion 4
Ozone is generated at a rate of 50,000 / cm ³
It was possible to selectively generate negative ions and ozone at ppm or less.

Next, another embodiment of the present invention will be described with reference to FIG. In the embodiment described above, the spatial gap length between the discharge electrode 12 and the counter electrode 14 was made constant, and the high voltage applied to both electrodes was made variable. However, in this embodiment, the applied voltage is made constant and the voltage between both electrodes is made constant. The space gap length is variable. The electric field device 70 of this embodiment includes a casing 79, a discharge electrode (ion generation electrode) 72 attached to a front surface 79 a of the casing 79, and a counter electrode 74.
And the AC high voltage generation circuit board 7 arranged in the housing 79.
8 and. The discharge electrode 72 is formed with a long hole 72a loosely fitted by a pin 76 and is configured to move up and down in conjunction with a lever 77 attached to a side surface 79c of the housing. By rotating the lever 77, the space gap between the electrodes 72 and 74 can be adjusted within the range of 3 to 6 mm. The counter electrode 74 and the AC high voltage generating circuit board 78 are integrally joined, and the AC high voltage generated by the AC high voltage generating circuit board 78 is directly applied to the counter electrode 74.

The results of the operation test of the electric field device 70 will be described with reference to the graph of the amount of generated ions and ozone and the space gap length in FIG. The graph of FIG. 9 shows the relationship between the amount of generated ions and the amount of generated ozone when the applied voltage between the discharge electrode 72 and the counter electrode 74 is fixed at 8 KVPP and the space gap length between both electrodes is changed. ing. A large amount of ozone is generated when the space gap length is 1.5 to 2.5 mm, negative ions and ozone are generated when the space gap length is 2.5 mm to 4 mm, and negative ions are generated when the space gap length is 4 to 10 mm. Often occurs. In this embodiment, when the above-mentioned lever 77 was rotated and the space gap length was set to 3 mm, 45,000 negative ions were generated / cm ³ and ozone was 0.05 ppm. Also,
When set to 6 mm, negative ions are 88,000
The number of ozone is 0.013 ppm or less per unit / cm ³ ,
It was possible to selectively generate negative ions and ozone.

As shown in this graph, the number of positive ions generated is always 5,0 even if the space gap length is changed.
The number was 00 / cm ³ or less. As described above, the effect of maintaining the freshness of food is mainly brought about by negative ions, but in the present embodiment, in order to apply the AC high voltage by interposing the dielectric ceramics between both electrodes, it is necessary to compare with positive ions. It was also demonstrated that many negative ions can be generated.

Next, another embodiment of the embodiment shown in FIG. 7 will be described with reference to FIG. In the embodiment described with reference to FIG. 7, the discharge electrode 72 is used to change the space gap length.
The electric field device 80 of the present embodiment is provided with two discharge electrodes 82A and 82B, and the spatial gap length between the discharge electrode 82A and the counter electrode 84 is 6 mm.
The side is set to 3 mm. Then, these discharge electrodes 82
A and 82B are connected so that the output voltage of the AC high voltage generation circuit is applied in parallel. According to this embodiment, it is possible to simultaneously generate ozone when the space gap length is 3 mm and negative ions when the space gap length is 6 mm. In this embodiment, the discharge electrodes 82A and 82A
It is also preferable to select either one of the electrodes B and B so that the wiring can be switched so that an AC high voltage can be applied.

In the embodiment described above, the embodiment in which the space gap length between the counter electrode and the discharge electrode is fixed and the applied voltage to both electrodes is made variable, and the space gap length is made to be constant by making the applied voltage to both electrodes constant. However, in the present invention, both the space gap length and the applied voltage can of course be variable in order to optimally generate ozone or negative ions. Further, in order to generate both ozone and negative ions at the same time, it is possible to select the optimum space gap length and applied voltage from the graphs shown in FIGS. 6 and 9. Furthermore, it is also preferable to change the space gap length or the applied voltage according to the change of the ambient environment of the electric field device such as humidity.

[0022]

The present invention has the structure described above, and
Since both the negative ions and ozone can be generated by one electric field device, the negative ions and ozone can be generated at low cost, and the size of the device can be reduced because only one generator can be used.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric field device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of a counter electrode used in the electric field device of FIG.

FIG. 3 is a side view of a counter electrode according to another embodiment of FIG.

FIG. 4 is a circuit diagram of an AC high voltage generating circuit according to an embodiment.

5 is a circuit diagram of an AC high voltage generating circuit according to another embodiment of FIG.

FIG. 6 is a graph showing the relationship between the applied voltage and the amount of negative ions generated and the amount of ozone generated.

FIG. 7 is a perspective view of an electric field device according to another embodiment of the present invention.

8 is a perspective view of an electric field device according to another embodiment of FIG. 7. FIG.

FIG. 9 is a graph showing the relationship between the electrode gap length and the negative ion generation amount and ozone generation amount.

[Explanation of symbols]

 10 Electric Field Device 12 Discharge Electrode 14 Counter Electrode 28 Alumina Green Sheet 30 Alumina Green Sheet 32 Planar Electrode 50 AC High Voltage Generation Circuit 70 Electric Field Device 72 Discharge Electrode 74 Counter Electrode 80 Electric Field Device 82A Discharge Electrode 82B Discharge Electrode 84 Counter Electrode C1 Capacitor C2 Capacitor S1 Relay S2 Relay

Claims (2)

[Claims] 1. An electric field device comprising a discharge electrode and a counter electrode arranged with a space gap between them, and an AC high voltage generating circuit for applying a high AC voltage between the electrodes, wherein the discharge electrode of the counter electrode is a discharge device. An electric field device, wherein a ceramics dielectric plate is integrally attached to a surface opposite to and a potential of a high voltage applied between the both electrodes of the AC high voltage generating circuit is made variable. 2. An electric field device comprising a discharge electrode and a counter electrode arranged with a space gap therebetween, and an AC high voltage generating circuit for applying an AC high voltage between the electrodes, wherein the discharge electrode of the counter electrode An electric field device, wherein a ceramics dielectric plate is integrally attached to a surface opposite to, and a plurality of lengths of the space gap between the discharge electrode and the counter electrode are present.