JPH0780350A - Production of atmospheric discharge electrode - Google Patents

Abstract

PURPOSE:To make uniform the exposure of a conducting filler on a discharge surface of a conducting plastic electrode to perform uniform discharge on the discharge surface. CONSTITUTION:A conducting plastic electrode 3 is formed of a material in which a resin 1 is filled with a conducting filler 2. While the conducting plastic electrode 3 is moved with its discharge surface 4 opposite to a metal electrode 5, high voltage is applied to both the electrodes. Thus discharge is caused between the conducting filler and the metal electrode facing to the filler across the resin of the discharge surface 4, allowing a fused omission part 6 in the shape of a funnel to be formed in the resin by a spark on discharge, permitting the conducting filler 2 to be exposed. By scanning the discharge surface 4 all over by the metal electrode 5, the conducting filler 2 is uniformly exposed on the discharge surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an air discharge electrode for ionizing air used in, for example, an air purifier.

[0002]

2. Description of the Related Art Recently, as a method for cleaning air, means for forcibly charging dust floating in the air and electrically collecting the dust has been adopted. In order to forcibly charge the floating dust, an air discharge is performed, but conventionally, this type of electrode is made of a metal such as tungsten, and tends to be expensive in terms of material. Further, since the material is inferior in workability, there is a restriction on the shape from that point, and it cannot always be said that the air discharge electrode is efficient.

Therefore, a conductive plastic plate, which is made of a material in which a conductive filler is filled in a thermoplastic resin and is inexpensive and excellent in workability, is arranged at intervals to form an electrode assembly. Each layer of this electrode assembly There has been proposed an ionizer electrode having a through hole that serves as a passage for a fluid that penetrates through and is ionized.

[0004]

However, in the electrode made of the above-mentioned conductive plastic plate, the conductive filler is only exposed on the peripheral surface of the perforated hole, and is exposed on the surface of the plate itself. Therefore, there is a drawback that uniform air discharge is not performed.

The present invention has been made under the above circumstances, and provides a method of manufacturing an air discharge electrode which is inexpensive and has no shape restriction due to the workability of a material and can obtain a uniform air discharge.

[0006]

The method for producing an aerial discharge electrode of the present invention is such that a metal electrode is made to face a discharge surface of a conductive plastic electrode made of a material obtained by filling a resin with a conductive filler. Is moved along the discharge surface, a high voltage is applied to both electrodes to cause dielectric breakdown of the discharge surface.

[0007]

According to the method of manufacturing an aerial discharge electrode having the above steps, discharge is performed between the metal electrode and the conductive filler facing the resin on the discharge surface, and the above-mentioned resin is generated by sparks during discharge. In this case, a funnel-shaped melting or missing portion occurs, and the conductive filler is exposed. Therefore, if the discharge surface is thoroughly scanned by the metal electrode, the conductive filler is uniformly exposed on the discharge surface, and uniform air discharge can be obtained.

[0008]

EXAMPLE In the production method of the present invention, a metal electrode is made to face and relatively move to a discharge surface of a plastic electrode made of a material in which a conductive filler such as copper fiber is filled in a thermoplastic resin, By applying a high voltage to both electrodes, the synthetic resin coating on the surface of the plastic electrode is dielectrically destroyed, and the conductive filler is exposed on the surface of the plastic electrode. This makes it possible to obtain an aerial discharge electrode made of conductive plastic having a uniform discharge surface.

An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a state in which the manufacturing method of one embodiment of the present invention is being carried out, FIG. 2 is a schematic cross-sectional view showing a part of it in an enlarged manner, and FIG. 3 is a schematic cross-sectional view in a state different from FIG. In FIG. 1, for example, a metal electrode 5 made of, for example, tungsten is made to face a discharge surface 4 of a conductive plastic electrode 3 made of a material obtained by filling a conductive filler 2 in a thermoplastic resin 1, and the metal electrode 5 is made conductive. A high voltage is applied between the electrodes 3 and 5 while moving with respect to the plastic electrode 3. The conductive plastic electrode is formed of, for example, a thermoplastic resin known as Emiclear (trade name of Toshiba Chemical Co., Ltd.) filled with copper fibers. Conductive plastic electrode 3 formed by injection molding or extrusion molding of the above conductive plastic
As described above, the exposure of the conductive filler on the discharge surface, that is, the surface is insufficient and uneven, and uniform discharge cannot be obtained.

As shown in FIG. 1, a metal electrode 5 is provided on the discharge surface.
When a high voltage is applied to both the electrodes while moving the metal electrode 5 along the discharge surface, as shown in FIG. During the movement, a discharge is generated between the metal electrode 5 and the metal electrode 5 facing it, and a spark at the time of discharge causes a funnel-shaped melting and a missing portion 6 on the resin 1 as shown in FIG. Is exposed. When the entire discharge surface is scanned by the metal electrode 5 as described above, the conductive filler 2 is uniformly exposed on the entire discharge surface 4 of the conductive plastic electrode 3,
It is possible to use an air discharge electrode that performs uniform air discharge.

In the above embodiment, the voltage applied for dielectric breakdown of the discharge surface of the conductive plastic electrode is
Although it is appropriately selected depending on the amount and distance of the conductive filler to be exposed on the discharge surface, it is set to about 2 to 6 kV, and it is possible to stop it so that no environmentally harmful O ₃ is generated.

The present invention is not limited to the above embodiment. For example, the conductive plastic may be any suitable one. Also, the metal electrode may be made of an appropriate material other than tungsten.

[0013]

As described above, according to the method for manufacturing an air discharge electrode of the present invention, it is possible to make the air discharge of an electrode made of a conductive plastic which is inexpensive and excellent in workability uniform on the discharge surface, By using this, for example, a high performance air purifier can be constructed.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a state in which a manufacturing method according to an embodiment of the present invention is being carried out.

FIG. 2 is a schematic cross-sectional view showing a part of the device in an enlarged manner.

FIG. 3 is a schematic cross-sectional view showing a state different from that of FIG. 2 in which a part thereof is enlarged.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Thermoplastic resin 2 ... Conductive filler 3 ... Conductive plastic electrode 4 ... Discharge surface 5 ... Metal electrode 6 ... Melting, missing part

Claims (1)

[Claims] 1. A high voltage is applied to both electrodes while a metal electrode is made to face the discharge surface of a conductive plastic electrode made of a material in which a conductive filler is filled in a resin, and the metal electrode is moved along the discharge surface. A method for manufacturing an aerial discharge electrode, which comprises applying an electric field to cause dielectric breakdown of a discharge surface.