WO2016035431A1

WO2016035431A1 - Discharge device

Info

Publication number: WO2016035431A1
Application number: PCT/JP2015/068483
Authority: WO
Inventors: 大江　信之; 西田　弘
Original assignee: シャープ株式会社
Priority date: 2014-09-02
Filing date: 2015-06-26
Publication date: 2016-03-10
Also published as: JPWO2016035431A1; CN207052938U; CN206135206U; JP6444420B2

Abstract

Provided is a discharge device capable of maintaining both performances of a positive discharge electrode and a negative discharge electrode for a long period of time. A discharge device (100) is provided with: a positive discharge electrode (11) that discharges electricity when a positive voltage is applied; and a negative discharge electrode (21) that discharges electricity when a negative voltage is applied. The outer circumferential surface of the positive discharge electrode (11), and the outer circumferential surface of the negative discharge electrode (21) are configured from different materials, respectively.

Description

Discharge device

The present invention relates to a discharge device, and more particularly, to a discharge device including a discharge electrode that discharges when a voltage is applied.

There are a wide variety of devices equipped with ion generators that use the discharge phenomenon, and the usage environment is also varied. Currently, a discharge device has been developed which has a structure in which a substrate on which a discharge electrode is fixed or the discharge electrode itself is fixed to a structure such as a resin and the periphery thereof is covered with an insulator.

Currently, metal needles are mainly used for the discharge phenomenon, and discharge electrodes made of SUS, tungsten, or nickel alloy have been put into practical use. At least the body portion of the discharge electrode is processed with tin, nickel plating or the like on the surface for soldering to the substrate. A corona discharge is generated at the tip of the metal needle to generate ions.

A clean room ionizer disclosed in JP-A-5-21131 (Patent Document 1) is provided with a pair of positive and negative needle electrodes. This electrode has a laminated structure in which a surface of a tungsten electrode is coated with nickel by plating.

JP-A-5-21131

In the conventional discharge device, the positive electrode discharge electrode to which a positive voltage is applied and the negative electrode discharge electrode to which a negative voltage is applied are made of the same material. The plating material covering the metal material constituting the electrode is also the same. When the positive electrode discharge electrode and the negative electrode discharge electrode are made of the same material, the production volume is increased, so that the cost can be reduced, and the positive electrode and the negative electrode are not mixed with each other, which is excellent in productivity.

On the other hand, among the discharge electrodes that generate the discharge phenomenon, the positive electrode discharge electrode to which a positive voltage is applied and the negative electrode discharge electrode to which a negative voltage is applied exhibit different behaviors during discharge. When the positive electrode discharge electrode and the negative electrode discharge electrode are made of the same material as in the prior art, the inventors have no resistance to either the positive electrode discharge electrode or the negative electrode discharge electrode in terms of the resistance to the phenomenon that occurs during discharge. I found a problem that would be sufficient.

The present invention has been made in view of the above-mentioned problems, and its main purpose is to provide a discharge device that can maintain the performance of both the positive electrode discharge electrode and the negative electrode discharge electrode over a long period of time.

In the high humidity environment where condensation can occur, particularly in a harsh environment including salt, such as near the coast, when discharging using a metal discharge electrode, the positive electrode discharge electrode and the negative electrode discharge electrode It was found that different electrolysis occurred, and as a result, a part of the metal used for the positive electrode discharge electrode was eluted to the surroundings, while a compound containing sodium was deposited on the negative electrode discharge electrode.

In addition, the present inventors have found that a metal discharge electrode is consumed due to the occurrence of discharge, but of the positive electrode discharge electrode and the negative electrode discharge electrode, the positive electrode discharge electrode may be more consumed. .

Based on these, the present inventors have found that if each of the positive electrode discharge electrode and the negative electrode discharge electrode is made of an optimum material, it is possible to cope with a harsh environment and to make the consumption of the electrode uniform. As a result, the present invention has been completed.

That is, the discharge device according to the present invention includes a positive electrode discharge electrode that discharges by applying a positive voltage, and a negative electrode discharge electrode that discharges by applying a negative voltage. The outer peripheral surface of the positive electrode discharge electrode and the outer peripheral surface of the negative electrode discharge electrode are made of different materials.

Preferably, the positive electrode discharge electrode and the negative electrode discharge electrode are entirely made of different materials.
Preferably, the positive electrode discharge electrode and the negative electrode discharge electrode have a conductive main body part and a coating layer covering the surface of the main body part. The coating layer of the positive electrode discharge electrode and the coating layer of the negative electrode discharge electrode are made of different materials.

Preferably, the outer peripheral surface of the positive electrode discharge electrode is made of a material resistant to chloride ions, and the outer peripheral surface of the negative electrode discharge electrode is made of a material resistant to sodium ions.

Preferably, the outer peripheral surface of the positive electrode discharge electrode is made of a material having better wear resistance than the outer peripheral surface of the negative electrode discharge electrode.

According to the discharge device of the present invention, since the elution or consumption of the metal components constituting the positive electrode discharge electrode can be suppressed, the discharge performance of both the positive electrode discharge electrode and the negative electrode discharge electrode can be stably maintained over a long period of time. Can do.

1 is a perspective view illustrating a configuration of a discharge device according to a first embodiment. It is sectional drawing which shows the positive electrode discharge electrode vicinity of the discharge device shown in FIG. It is sectional drawing which shows the negative electrode discharge electrode vicinity of the discharge device shown in FIG. It is sectional drawing which shows the positive electrode discharge electrode vicinity of the discharge device of Embodiment 2. It is sectional drawing which shows the negative electrode discharge electrode vicinity of the discharge device of Embodiment 2. FIG. 6 is a cross-sectional view showing the vicinity of a positive electrode discharge electrode in a discharge device according to a third embodiment. FIG. 6 is a cross-sectional view showing the vicinity of a negative electrode discharge electrode in a discharge device according to a third embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a perspective view showing a configuration of a discharge device 100 according to the first embodiment. With reference to FIG. 1, the discharge device 100 includes a positive electrode discharge electrode 11, a negative electrode discharge electrode 21, and a main body case 2. The positive electrode discharge electrode 11 and the negative electrode discharge electrode 21 are formed in a needle shape.

The main body case 2 is provided as a casing that forms the appearance of the discharge device 100. The main body case 2 has a rectangular container portion 1. The container portion 1 defines a bottomed hollow space therein. The internal space of the container part 1 is filled with an insulator 14 that is a resin material. The body case 2 also has an electrode protection wall 3. The electrode protection wall 3 is arranged around the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21. The electrode protection wall 3 is provided to protect the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21.

FIG. 2 is a cross-sectional view showing the vicinity of the positive electrode 11 in the discharge device 100 shown in FIG. Referring to FIG. 2, positive electrode 11 has a root portion 11 a supported by substrate 15, a sharp tip 11 b, and a tapered portion 11 c that tapers from root portion 11 a toward point 11 b. ing. The root portion 11a has the base end of the positive electrode 11 on the opposite side to the tip 11b. A part of the root portion 11 a is embedded in the insulator 14. A lower portion of the root portion 11a is sealed with an insulator 14. The tip 11b protrudes from the surface 14s of the insulator 14.

An induction electrode (counter electrode) 12 and a substrate 15 are embedded in the insulator 14. The positive electrode 11 is supported by the substrate 15. The induction electrode 12 is disposed around the positive electrode discharge electrode 11 at a position away from the positive electrode discharge electrode 11. The induction electrode 12 having a reference potential is formed of a conductive material such as metal. The induction electrode 12 and the substrate 15 are all embedded in the insulator 14 and are sealed with the insulator 14.

The insulator 14 is preferably filled with a thermosetting resin such as an epoxy resin or a coating material obtained by dissolving a rubber-based polymer material in a solvent. The insulator 14 preferably has a thickness that can sufficiently seal the induction electrode 12 and the substrate 15.

The substrate 15 has a flat plate shape and is arranged in parallel with the bottom surface of the container portion 1 of the main body case 2. The substrate 15 has a main surface 15a that forms a surface on the discharge side, and a back surface 15b on the opposite side to the main surface 15a. The main surface 15 a and the back surface 15 b of the substrate 15 are covered with an insulator 14. The substrate 15 is formed with a through hole penetrating the substrate 15 in the thickness direction and extending from the main surface 15a to the back surface 15b. The through hole formed in the substrate 15 may be a through hole via in which a conductor is formed on the inner wall surface.

The positive electrode 11 is inserted through a through hole formed in the substrate 15. The base portion 11 a of the positive electrode discharge electrode 11 is fixed to the substrate 15 by soldering, for example, so that the positive electrode discharge electrode 11 is supported by the substrate 15. The other end of the positive electrode 11 opposite to the tip 11 b protrudes from the back surface 15 b of the substrate 15. The positive electrode 11 is supported on the substrate 15 while penetrating the substrate 15. A wiring pattern is formed on the main surface 15 a and the back surface 15 b of the substrate 15. The positive electrode 11 is electrically connected to a wiring pattern or lead formed on the substrate 15 by solder.

In the example shown in FIG. 2, the positive electrode 11 is shown penetrating the substrate 15. However, the positive electrode 11 may be mounted on the main surface 15 a of the substrate 15.

The discharge device 100 applies a positive high voltage to the positive electrode discharge electrode 11 to generate a potential difference with the induction electrode 12, thereby generating corona discharge from the tip 11b of the positive electrode discharge electrode 11 and generating positive ions. . Since the tip 11b of the positive electrode 11 protrudes from the surface 14s of the insulator 14, ions generated at the tip 11b can be quickly conveyed.

If a circuit that generates a high voltage to be applied to the positive electrode discharge electrode 11 exists in the main body case 2 of the discharge device, it is desirable that the circuit is covered with the main body case 2 or sealed with an insulator 14. By doing so, it is possible to prevent a circuit that generates a high voltage from coming into contact with a harsh environment, and to prevent leaks from occurring in areas other than the electrode portion. Further, a voltage may be applied to the positive electrode 11 via the substrate 15.

Further, a high voltage applied to the positive electrode 11 may be supplied from the outside of the discharge device 100. In that case, it is preferable to seal a path such as a substrate or a connector for supplying a high voltage to the positive electrode 11 with an insulator, a water-resistant gel, an insulating tube, or the like. By doing so, it is possible to prevent the periphery of the path from coming into contact with a harsh environment and to suppress the occurrence of leaks at locations other than the electrode portion.

The high voltage applied to the positive electrode 11 is based on a pulse voltage, but may be a DC voltage. The voltage may be any magnitude as long as discharge occurs.

FIG. 3 is a cross-sectional view showing the vicinity of the negative electrode discharge electrode 21 of the discharge device 100 shown in FIG. The negative electrode discharge electrode 21 has the same shape as the positive electrode discharge electrode 11 shown in FIG. Referring to FIG. 3, negative electrode 21 has a root portion 21 a supported by substrate 15, a sharp tip 21 b, and a tapered portion 21 c that tapers from root 21 a toward tip 21 b. ing. The root portion 21a has a base end of the negative electrode 21 that is opposite to the tip 21b. A part of the root portion 21 a is embedded in the insulator 14. A lower portion of the root portion 21 a is sealed with the insulator 14. The tip 21b protrudes from the surface 14s of the insulator 14.

The discharge device 100 applies a negative high voltage to the negative electrode discharge electrode 21 to generate a potential difference with the induction electrode 12, thereby generating corona discharge from the tip 21b of the negative electrode discharge electrode 21 and generating negative ions. . As shown in FIG. 1, the discharge device 100 includes both a positive electrode 11 and a negative electrode 21, a positive voltage is applied to the positive electrode 11, and a negative voltage is applied to the negative electrode 21. It is possible to generate both positive ions and negative ions at the same time.

In the example shown in FIGS. 2 and 3, the induction electrode 12 is located at two positions on the left and right sides with respect to the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21. The induction electrode 12 is preferably substantially circular so as to be arranged at an equal distance from the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21. The induction electrode 12 may be a metal object such as a sheet metal or a wire, or may be a pattern printed on the substrate 15, and the material of the induction electrode 12 is not limited as long as it serves as a potential reference.

The positive electrode discharge electrode 11 and the negative electrode discharge electrode 21 are needle-shaped in the present embodiment, but may be fine wires or extra fine wires. Moreover, as long as it is a dischargeable shape, it may be a thin plate shape with a sharp point.

The whole of the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21 is made of a conductive material such as metal. The positive electrode discharge electrode 11 and the negative electrode discharge electrode 21 are entirely made of different materials. Therefore, the outer peripheral surface 11s of the positive electrode discharge electrode 11 and the outer peripheral surface 21s of the negative electrode discharge electrode 21 are made of different materials.

The positive electrode 11 is made of a material resistant to chloride ions. For this reason, the outer peripheral surface 11s of the positive electrode 11 is made of a material resistant to chloride ions. The positive electrode 11 may be made of tungsten or a noble metal such as gold or platinum.

The negative electrode discharge electrode 21 is made of a material resistant to sodium ions. Therefore, the outer peripheral surface 21s of the negative electrode discharge electrode 21 is made of a material resistant to sodium ions. Negative electrode discharge electrode 21 may be made of a nickel alloy having a low iron content, such as Inconel.

Inconel is generally an alloy with excellent corrosion resistance and suitable for use in seawater, but when used as a discharge electrode, it is necessary to select a material in consideration of the chemical reaction associated with the discharge. When discharging is performed in an environment containing salt, different electrolysis occurs between the positive electrode 11 and the negative electrode 21. If the material constituting the negative electrode discharge electrode 21 is Inconel, sufficient corrosion resistance can be obtained, while the material constituting the positive electrode discharge electrode 11 is insufficient even with Inconel. Therefore, a material such as tungsten that is more resistant to chloride ions needs to be a constituent material of the positive electrode discharge electrode 11.

According to the discharge device 100 of Embodiment 1 described above, the outer peripheral surface 11s of the positive electrode discharge electrode 11 is made of a material resistant to chloride ions, and the outer peripheral surface 21s of the negative electrode discharge electrode 21 is made of sodium ions. Constructed of resistant material.

In an environment containing salt, sodium chloride is contained in the air. Therefore, when discharging in an environment containing salt, the positive electrode discharge electrode 11 tends to generate chloride ions, and the negative electrode discharge electrode 21 tends to generate sodium ions. If a part of the metal used for the positive electrode 11 is eluted by the chloride ions, the induction electrode 12 having a polarity different from that of the positive electrode 11, or the main body case 2 of the discharge device 100, etc. The current flows through this part, and the discharge performance at the original discharge part is lowered.

The outer peripheral surface 11s of the positive electrode discharge electrode 11 and the outer peripheral surface 21s of the negative electrode discharge electrode 21 are made of different materials, and the outer peripheral surface 11s of the positive electrode discharge electrode 11 is made of a material resistant to chloride ions. The metal constituting the outer peripheral surface 11s of the electrode 11 is difficult to elute. Therefore, the elution of the metal component which comprises the outer peripheral surface 11s of the positive electrode 11 can be suppressed. Since the occurrence of leakage due to the elution of the components of the positive electrode discharge electrode 11 can be suppressed, the discharge performance of the discharge device 100 can be stably maintained over a long period of time even in a high humidity environment or an atmospheric environment containing salt.

By forming the outer peripheral surface 21 s of the negative electrode discharge electrode 21 with a material resistant to sodium ions, the generation of rust on the negative electrode discharge electrode 21 can be suppressed even if a compound containing sodium is deposited on the negative electrode discharge electrode 21. it can. Unlike the positive electrode discharge electrode 11, elution of the material constituting the negative electrode discharge electrode 21 does not occur. Therefore, it is necessary to configure the negative electrode discharge electrode 21 with the same material that is resistant to chloride ions as the positive electrode discharge electrode 11. Absent. By forming the negative electrode discharge electrode 21 with a material cheaper than the positive electrode discharge electrode 11 without making the negative electrode discharge electrode 21 excessive quality, it is possible to realize the discharge device 100 that is excellent in terms of cost.

(Embodiment 2)
FIG. 4 is a cross-sectional view showing the vicinity of the positive electrode 11 in the discharge device of the second embodiment. FIG. 5 is a cross-sectional view showing the vicinity of the negative electrode discharge electrode 21 of the discharge device of the second embodiment. The discharge device of the second embodiment and the discharge device 100 of the first embodiment described above basically have the same configuration. However, the discharge device of the second embodiment is different from the first embodiment in the configuration of the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21.

In the present embodiment, the positive electrode 11 has a conductive main body 11m and a coating layer 13 that covers the surface of the main body 11m. In the positive electrode discharge electrode 11 of the second embodiment, the outer peripheral surface 13 s of the coating layer 13 constitutes the outer peripheral surface of the positive electrode discharge electrode 11. The covering layer 13 is formed by plating the surface of the main body 11m. The covering layer 13 is made of a material resistant to chloride ions. The covering layer 13 may be formed by gold plating.

The negative electrode 21 has a conductive main body 21m and a coating layer 23 that covers the surface of the main body 21m. In the negative electrode discharge electrode 21 of the second embodiment, the outer peripheral surface 23 s of the coating layer 23 constitutes the outer peripheral surface of the negative electrode discharge electrode 21. The covering layer 23 is formed by plating the surface of the main body portion 21m. The covering layer 23 is made of a material resistant to sodium ions. The covering layer 23 may be formed by nickel plating.

The coating layer 13 of the positive electrode 11 and the coating layer 23 of the negative electrode 21 are made of different materials. Therefore, the outer peripheral surface of the positive electrode discharge electrode 11 and the outer peripheral surface of the negative electrode discharge electrode 21 are made of different materials.

According to the discharge device of the second embodiment described above, the outer peripheral surface 13s of the coating layer 13 constitutes the outer peripheral surface of the positive electrode discharge electrode 11. The covering layer 13 is formed of a material resistant to chloride ions. The outer peripheral surface 23 s of the coating layer 23 constitutes the outer peripheral surface of the negative electrode discharge electrode 21. The covering layer 23 is made of a material resistant to sodium ions.

The covering layer 13 of the positive electrode 11 and the covering layer 23 of the negative electrode 21 are made of different materials, and the outer peripheral surface of the positive electrode 11 is made of a material resistant to chloride ions. The metal which comprises 11 outer peripheral surfaces becomes difficult to elute. Therefore, the elution of the metal component which comprises the outer peripheral surface of the positive electrode discharge electrode 11 can be suppressed. Since the occurrence of leakage due to the elution of the components of the positive electrode discharge electrode 11 can be suppressed, the discharge performance of the discharge device can be stably maintained over a long period of time even in a high humidity environment or an atmospheric environment containing salt.

By forming the outer peripheral surface of the negative electrode discharge electrode 21 with a material resistant to sodium ions, the generation of rust of the negative electrode discharge electrode 21 can be suppressed even if a compound containing sodium is deposited on the negative electrode discharge electrode 21. . Unlike the positive electrode 11, the elution of the material constituting the negative electrode 21 does not occur, so that the covering layer 23 of the negative electrode 21 is resistant to the same chloride ions as the covering layer 13 of the positive electrode 11. It is not necessary to be made of a certain material. By forming the coating layer 23 with a material cheaper than the coating layer 13 of the positive electrode discharge electrode 11 without making the coating layer 23 of the negative electrode discharge electrode 21 excessive quality, a discharge device that is excellent in terms of cost is realized. be able to.

In the present embodiment, it is described that the positive electrode 11 has the conductive main body 11m and the coating layer 13 that covers the surface of the main body 11m. However, the tip 11b and the taper of the positive electrode 11 are described. 11c may be coat | covered with the same coating layer 13 as the main-body part 11m. Moreover, the part embedded inside the insulator 14 among the positive electrode discharge electrodes 11 may be coat | covered with the same coating layer 13 as the main-body part 11m. Similarly, it has been described that the negative electrode discharge electrode 21 has a conductive main body part 21m and a coating layer 23 covering the surface of the main body part 21m. However, the sharp tip 21b and the tapered part 21c of the negative electrode discharge electrode 21 are the main body. You may coat | cover with the same coating layer 23 as the part 21m. Moreover, the part embedded in the insulator 14 among the negative electrode discharge electrodes 21 may be coat | covered with the same coating layer 23 as the main-body part 21m.

(Embodiment 3)
FIG. 6 is a cross-sectional view showing the vicinity of the positive electrode 11 in the discharge device of the third embodiment. FIG. 7 is a cross-sectional view showing the vicinity of the negative electrode discharge electrode 21 of the discharge device of the third embodiment. In the discharge device of the third embodiment, unlike the discharge device 100 of the first embodiment described above, the inner space of the container portion 1 is not filled with an insulator, and the root portions of the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21 are not filled. 11a and 21a are not sealed with an insulator.

A pattern is formed on the main surface 15 a of the substrate 15, and this pattern functions as the induction electrode 12. Since the inner space of the container part 1 is not filled with an insulator, the induction electrode 12 and the substrate 15 are not sealed with the insulator. A support portion (not shown) is provided on the inner surface of the container portion 1, and the substrate 15 is supported with respect to the container portion 1 by this support portion.

The positive electrode discharge electrode 11 is made of a material having better wear resistance than the negative electrode discharge electrode 21. Therefore, the outer peripheral surface 11 s of the positive electrode discharge electrode 11 is made of a material that is more excellent in wear resistance than the outer peripheral surface 21 s of the negative electrode discharge electrode 21. The constituent material of the positive electrode discharge electrode 11 may be a material superior in heat resistance as compared with the constituent material of the negative electrode discharge electrode 21. The constituent material of the positive electrode discharge electrode 11 may be a material having a higher melting point than the constituent material of the negative electrode discharge electrode 21 or a material having a low thermal conductivity. When the negative electrode discharge electrode 21 is made of stainless steel, the positive electrode discharge electrode 11 may be made of Inconel.

According to the discharge device of the third embodiment described above, the outer peripheral surface 11s of the positive electrode discharge electrode 11 is made of a material that is more excellent in wear resistance than the outer peripheral surface 21s of the negative electrode discharge electrode 21.

Unlike the first and second embodiments, the discharge device of the third embodiment is assumed to be used in a normal environment not containing salt. Since sodium chloride is not contained in the air or is contained in a trace amount, it is not necessary to consider the elution of the material constituting the positive electrode discharge electrode 11. On the other hand, exhaustion of the positive electrode 11 and the negative electrode 21 occurs with the discharge. Of the positive electrode discharge electrode 11 and the negative electrode discharge electrode 21, the positive electrode discharge electrode 11 may be consumed more violently.

The outer peripheral surface 11 s of the positive electrode 11 and the outer surface 21 s of the negative electrode 21 are made of different materials, and the outer surface 11 s of the positive electrode 11 is worn out more than the outer surface 21 s of the negative electrode 21. Consists of materials with excellent properties. Thereby, since the difference between the consumption amount of the positive electrode 11 and the consumption amount of the negative electrode 21 can be reduced, the uniformity of the discharge state in the positive electrode 11 and the negative electrode 21 can be improved. Therefore, the discharge performance of the discharge device can be stably maintained over a long period of time, and the balance between positive ions generated at the positive electrode discharge electrode 11 and negative ions generated at the negative electrode discharge electrode 21 can be improved.

The negative electrode discharge electrode 21 is made of a material that is less consumable than the positive electrode discharge electrode 11, so that the negative electrode discharge electrode 21 is made of an inexpensive material compared to the positive electrode discharge electrode 11 without making the negative electrode discharge electrode 21 excessive quality. The electrode 21 can be configured. Therefore, it is possible to realize a discharge device that is excellent in terms of cost.

Although the embodiments of the present invention have been described above, the configurations of the embodiments may be combined as appropriate. In addition, it should be considered that the embodiment disclosed this time is illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

The present invention can be widely applied to various devices including a discharge device such as an ion generator, an ozone generator, and a static eliminator.

1 container part, 2 body case, 3 electrode protection wall, 11 positive electrode discharge electrode, 11a, 21a root part, 11b, 21b tip, 11c, 21c taper part, 11m, 21m body part, 11s, 13s, 21s, 23s outer peripheral surface , 12 induction electrode, 13, 23 coating layer, 14 insulator, 14s surface, 15 substrate, 15a main surface, 15b back surface, 21 negative electrode, 100 discharge device.

Claims

A positive electrode for discharging a positive voltage to be discharged;
A negative electrode for discharging by applying a negative voltage,
The discharge device in which the outer peripheral surface of the positive electrode discharge electrode and the outer peripheral surface of the negative electrode discharge electrode are made of different materials.
The discharge device according to claim 1, wherein the positive electrode discharge electrode and the negative electrode discharge electrode are entirely made of different materials.
The positive electrode discharge electrode and the negative electrode discharge electrode have a conductive main body part and a coating layer that covers the surface of the main body part,
The discharge device according to claim 1, wherein the coating layer of the positive electrode discharge electrode and the coating layer of the negative electrode discharge electrode are made of different materials.
The outer peripheral surface of the positive electrode discharge electrode is made of a material resistant to chloride ions,
The discharge device according to any one of claims 1 to 3, wherein the outer peripheral surface of the negative electrode discharge electrode is made of a material resistant to sodium ions.
The discharge device according to any one of claims 1 to 3, wherein the outer peripheral surface of the positive electrode discharge electrode is made of a material having higher wear resistance than the outer peripheral surface of the negative electrode discharge electrode.