A multi-purpose plasma self-sustaining excitation electrode

Abstract

The present invention relates to a multi-purpose plasma self-sustaining excitation electrode, comprising an insulating support, a high-voltage electrode module, an adjustment ring, and a low-voltage electrode. A high-voltage cavity with an opening facing upward is arranged in the insulating support, the high-voltage electrode module is installed upward in the high-voltage cavity, a cylindrical front end outer wall is arranged at the upper part of the insulating support, a circular ring-shaped adjustment ring and a circular ring-shaped low-voltage electrode are tightly fitted on the front end outer wall, an adjustment ring for adjusting the upper and lower positions of the low-voltage electrode is located at the lower end of the low-voltage electrode, the insulating support is made of insulating material, and the high-voltage electrode module and the low-voltage electrode are made of conductive material. The electrode can form a uniform and stable dispersed low-temperature plasma in an atmospheric environment, and through the action of the adjustment ring and the screw, plasmas of different strengths, different stabilities, and different shapes are produced, which is convenient for use in multiple occasions.

Description

Technical Field

[0001] The invention relates to the field of electrical engineering and electrical technology, and in particular to a multi-purpose plasma self-sustaining excitation electrode. Background Art

[0002] The application of plasma technology in industrial and civilian fields has been increasing, but the generation of plasma often requires complex structures, high-voltage and high-power power supplies, and often requires special gases or adjustable gas pressure. These generation conditions limit the further application of plasma. How to obtain stable, diffuse, uniform, and low-temperature plasma in an atmospheric environment has always been the focus of research at home and abroad. The plasma generated in an atmospheric pressure environment can basically meet the application needs of various aspects, and the low temperature, uniformity, and stability have great application prospects in the civilian field, such as ozone production, air purification, medical beauty, viewing, surface treatment, etc. However, since the discharge in atmospheric pressure air can easily be converted from Thomson discharge to streamer discharge, the contraction characteristics of streamer discharge determine that the electrode discharge can easily lead to breakdown and form bright discharge spark filaments. How to generate stable, uniform, and dispersed plasma in an atmospheric environment is an urgent problem that needs to be solved now. Summary of the invention

[0003] Based on the above description, the present invention provides a multi-purpose plasma self-sustaining excitation electrode to solve the problem that ordinary equipment cannot obtain stable, diffused and uniform low-temperature plasma in an atmospheric environment.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A multi-purpose plasma self-sustaining excitation electrode includes an insulating support, a high-voltage electrode module, an adjustment ring, and a low-voltage electrode. A high-voltage chamber with an upward opening is provided in the insulating support, the high-voltage electrode module is installed in the high-voltage chamber, a cylindrical front end outer wall is provided at the upper part of the insulating support, the annular adjustment ring and the annular low-voltage electrode are tightly fitted on the front end outer wall, the adjustment ring for adjusting the upper and lower positions of the low-voltage electrode is located at the lower end of the low-voltage electrode, the insulating support is made of insulating material, and the high-voltage electrode module and the low-voltage electrode are made of conductive material. The electrode of this scheme can generate uniform and stable plasma in an atmospheric environment. By adjusting the position of the low-voltage electrode through the adjustment ring, the intensity, stability and shape of the generated plasma can be changed.

[0006] Preferably, a step shaft is provided at the lower end of the front end outer wall, an outer thread is provided on the outer wall of the step shaft, and the adjusting ring is installed on the step shaft in a threaded connection manner. The adjusting ring is installed on the step shaft in a threaded connection manner to facilitate adjusting the upper and lower positions of the low-voltage electrode.

[0007] Preferably, the high-voltage electrode module includes a high-voltage needle base and a high-voltage needle electrode, the high-voltage needle base is installed in the high-voltage cavity, and the high-voltage needle electrode is fixed to the high-voltage needle base with the high-voltage needle electrode facing upward. By dividing the high-voltage electrode module into a high-voltage needle base and a high-voltage needle electrode assembly design, it is easy to manufacture and install, and it is also easy to select materials.

[0008] Preferably, the upper end surface of the high-voltage needle base is evenly provided with a plurality of pinholes in a circumferential array, and the high-voltage needle electrode is fastened to each of the pinholes. The upper end surface of the high-voltage needle base is evenly and densely provided with a plurality of pinholes for inserting the high-voltage needle electrode, thereby forming a relatively uniform electric field, thereby generating a uniform plasma.

[0009] Preferably, the multi-purpose plasma self-sustaining excitation electrode further includes a screw for adjusting the up and down position of the high-voltage needle base, a center hole is arranged at the bottom of the insulating support, the center hole passes through the bottom of the insulating support and the high-voltage cavity, a threaded hole is arranged at the center position of the bottom end of the high-voltage needle base, and the screw passes through the center hole and cooperates with the threaded hole. By installing a screw that can be screwed at the bottom of the high-voltage needle base, it is convenient to adjust the up and down position of the high-voltage needle base.

[0010] Preferably, a central groove with an upward opening is provided at the center position of the top of the high-voltage needle base. By providing the central groove at the top of the high-voltage needle base, it is convenient to adjust the up and down position of the high-voltage needle base with the screw rod.

[0011] Preferably, the low-voltage electrode is a triangular cone ring structure, and when the low-voltage electrode is mounted on the front outer wall, the low-voltage electrode is set to a sharp corner toward the upper end. The tip of the low-voltage electrode faces upward, so that the high-voltage electric field between the low-voltage electrode and the high-voltage electrode module is convenient for exciting plasma.

[0012] Preferably, the ratio of the creeping electrical distance L1+L2 to the wall thickness L3 of the high-voltage chamber 14 is less than or equal to 3. By designing the ratio of L1+L2 to L3 to be within 3, the plasma high-voltage excitation power supply is lowered when the plasma is excited, and the high voltage breakdown of the insulating support is avoided.

[0013] A multi-purpose plasma self-sustaining excitation electrode system comprises a plasma high-voltage excitation power supply and the above-mentioned multi-purpose plasma self-sustaining excitation electrode, wherein the low-voltage electrode is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply and is grounded, and the high-voltage electrode module of the above-mentioned electrode is electrically connected to the high-voltage end of the plasma high-voltage excitation power supply.

[0014] A multi-purpose plasma self-sustaining excitation electrode system comprises a plasma high-voltage excitation power supply, an external conductor, and the above-mentioned multi-purpose plasma self-sustaining excitation electrode, wherein the low-voltage electrode is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply, and the low-voltage electrode is grounded; the external conductor is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply, and is grounded; and the high-voltage electrode module of the above-mentioned electrode is electrically connected to the high-voltage end of the plasma high-voltage excitation power supply.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] The present invention relates to a multi-purpose plasma self-sustaining excitation electrode, which can form a uniformly stable and dispersed low-temperature plasma in an atmospheric environment, and produce plasmas of different strengths, different stabilities and different shapes through the action of an adjusting ring and a screw rod, so as to be convenient for use in multiple occasions. A high-voltage electric field along the surface is formed through a cylindrical insulating support, a sharp high-voltage needle electrode array and a triangular cone-shaped low-voltage electrode, thereby exciting plasma in an atmospheric environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural oblique view of the electrode of the present invention;

[0018] Figure 2 is a structural exploded diagram of the electrode of the present invention;

[0019] Figure 3 It is a cross-axis sectional view of the electrode of the present invention;

[0020] Figure 4 It is a cross-axis sectional view of the insulating support of the present invention;

[0021] Figure 5 This is a structural oblique view of the high-voltage needle base of the present invention;

[0022] Figure 6 It is a cross-axis sectional view of the high-pressure needle base of the present invention;

[0023] Figure 7 It is a cross-axis sectional view of the low voltage electrode of the present invention;

[0024] Figure 8 It is a schematic diagram of the dimensions of the insulating support of the present invention;

[0025] Fig. 9 This is a schematic diagram of the first mode of use of the low voltage electrode of the present invention;

[0026] Fig.10 This is a schematic diagram of the low voltage electrode of the present invention when used in the second mode;

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Insulating support; 2. High-voltage needle base; 3. High-voltage needle electrode; 4. Adjustment ring; 5. Low-voltage electrode; 7. First plasma; 8. Second plasma; 9. External conductor; 11. Step shaft; 12. Front end outer wall; 13. Rear port; 14. High-voltage chamber; 15. Center hole; 21. Pinhole; 22. Threaded hole; 23. Center groove; 41. Wiring groove. DETAILED DESCRIPTION

[0029] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown. A multi-purpose plasma self-sustaining excitation electrode comprises an insulating support 1, a high-voltage electrode module, an adjustment ring 4, and a low-voltage electrode 5. A high-voltage chamber 14 with an upward opening is arranged in the insulating support 1, and the high-voltage electrode module is installed in the high-voltage chamber 14. A cylindrical front end outer wall 12 is arranged at the upper part of the insulating support 1. The circular adjustment ring 4 and the circular low-voltage electrode 5 are tightly fitted on the front end outer wall 12. The adjustment ring 4 for adjusting the upper and lower positions of the low-voltage electrode 5 is located at the lower end of the low-voltage electrode 5. The insulating support 1 is made of insulating material, and the high-voltage electrode module and the low-voltage electrode 5 are made of conductive material. The insulating support 1 is made of insulating material, and the high-voltage electrode module is installed through the high-voltage chamber 14 with an upward opening, and the low-voltage electrode 5 is fastened through the front end outer wall 12. The cylindrical structure formed by the high-voltage chamber 14 and the front end outer wall 12 separates the high-voltage electrode module from the low-voltage electrode 5. The circular high-pressure chamber 14 and the circular front outer wall 12 are concentric, thereby ensuring that the high-pressure electrode module in the high-pressure chamber 14 and the low-pressure electrode 5 outside the front outer wall 12 are in a concentric position, thereby forming a uniform plasma on the upper surface of the insulating support 1. The high-pressure electrode module can be tightly installed in the high-pressure chamber 14 or can be adjusted up and down, and the side of the high-pressure electrode module for installing the high-pressure needle electrode faces upward.

[0031] The adjusting ring 4 can be installed on the front outer wall 12 so as to be adjustable up and down. It can be slidably connected up and down. For example, the adjusting ring 4 can be made of elastic material, or a rubber ring can be set inside the adjusting ring 4 to facilitate the up and down sliding of the adjusting ring 4 and the fixing of the adjusting ring 4. The low-voltage electrode 5 is tightly mounted on the front outer wall 12, and the lower end of the low-voltage electrode 5 is tightly connected to the upper end surface of the adjusting ring 4. When adjusting the adjusting ring 4, the upper and lower positions of the low-voltage electrode 5 can be adjusted at the same time. The upper end or top position specified in this scheme is to Figure 3The upper part of the figure is the upper end or top end, and the lower part of the figure is the lower end or bottom end. A rear port 13 is provided at the bottom of the insulating support 1 for installing a high-voltage lead. The high-voltage needle electrode 3 provided on the high-voltage electrode module faces upward and is used to cooperate with the low-voltage electrode 5 to form a high voltage. The high-voltage electrode module is made of conductive material. A wiring groove 41 is provided on the upper end surface of the adjustment ring 4 for fixing the low-voltage lead, so as to facilitate the connection of the low-voltage electrode 5 with the low-voltage lead.

[0032] In this embodiment, Figure 3 , Figure 4 As shown. The lower end of the front end outer wall 12 is provided with a step shaft 11, the outer wall of the step shaft 11 is provided with an external thread, the diameter of the step shaft 11 is greater than or equal to the diameter of the front end outer wall 12, and the adjustment ring 4 is installed on the step shaft 11 in a threaded connection manner. The outer wall of the step shaft 11 is provided with an external thread, and the inner wall of the adjustment ring 4 is provided with an internal thread. The adjustment ring 4 is threadedly connected with the step shaft 11, and the upper and lower positions of the adjustment ring 4 are adjusted by twisting the adjustment ring 4 left and right, thereby adjusting the upper and lower distances of the low-voltage electrodes 5.

[0033] In this embodiment, Figure 3 , Figure 4 , Figure 5 As shown. The high-voltage electrode module includes a high-voltage needle base 2 and a high-voltage needle electrode 3. The high-voltage needle base 2 is installed in the high-voltage chamber 14, and the high-voltage needle electrode 3 is fixed upward on the high-voltage needle base 2. The high-voltage needle base 2 is used to fix the high-voltage needle electrode 3. The high-voltage needle base 2 is made of an easily conductive material, and the high-voltage needle electrode 3 is made of an ablation-resistant conductive material. The high-voltage needle electrode 3 is fixed to one end of the high-voltage needle base 2 flush, and the other end is installed upward, and the upward end is sharp, which is convenient for forming high voltage with the low-voltage electrode 5. The high-voltage needle base 2 can be tightly fixed in the high-voltage chamber 14, and the high-voltage needle base 2 can also be slidably installed in the high-voltage chamber 14. A layer of rubber sleeve can be wrapped outside the high-voltage needle base 2, so as to achieve the purpose of fastening and adjustment. The high-voltage needle base 2 is made of copper. The high-voltage needle base 2 is made of copper, which is a very easy conductive material with low resistance, which reduces the influence of the high-voltage needle base 2 on the voltage of the high-voltage needle electrode 3, so that the high-voltage needle electrode 3 has a stable high voltage, which is convenient for exciting plasma. The high-voltage needle electrode 3 is made of stainless steel. The high-voltage needle electrode 3 is made of stainless steel, which is an ablation-resistant conductive material, and can reduce the ablation effect on the high-voltage needle electrode 3 when plasma is formed. The insulating support 1 is made of organic glass or nylon. Organic glass or nylon materials have good insulation properties and a large breakdown voltage per unit length, and can achieve a good insulation effect.

[0034] In this embodiment, Figure 3 , Figure 5As shown. The upper end surface of the high-voltage needle base 2 is evenly provided with a plurality of pinholes 21 in a circular array, and the high-voltage needle electrode 3 is fastened to each of the pinholes 21. After the high-voltage needle base 2 is installed in the high-voltage chamber 14, a plurality of pinholes 21 are arranged on the upward end surface, and the plurality of pinholes 21 are evenly distributed on the upper end surface of the circular high-voltage needle base 2 in a circular array, and a plurality of rows of pinholes 21 are arranged from the outer ring of the cylindrical high-voltage needle base 2 to the inner part, thereby forming a uniform and dense array of pinholes 21 on the upper end surface of the high-voltage needle base 2, and a high-voltage needle electrode 3 is fixedly inserted into each pinhole 21, thereby forming a relatively uniform electric field, thereby generating a uniform plasma. The array of high-voltage needle electrodes 3 is an excitation emission source of plasma, and is made of ablation-resistant conductive material, and is required to have the same length, a pointed end, a tip curvature radius as small as possible, a flush mounting end, and a high-voltage needle electrode 3 and a pinhole 21 are installed in a tight fit.

[0035] In this embodiment, Figure 3 , Figure 6 As shown. The multi-purpose plasma self-sustaining excitation electrode also includes a screw for adjusting the up and down position of the high-voltage needle base 2. A center hole 15 is set at the bottom of the insulating support 1. The center hole 15 passes through the bottom of the insulating support 1 and the high-voltage chamber 14. A threaded hole 22 is set at the center position of the bottom end of the high-voltage needle base 2. The screw passes through the center hole 15 and cooperates with the threaded hole 22. The center hole 15 is located at the center of the bottom circle of the insulating support 1, and the threaded hole 22 is also located at the center position of the bottom end of the high-voltage needle base 2, so as to ensure that the high-voltage needle base 2 is concentric with the insulating support 1, and then the high-voltage needle base 2 is concentric with the low-voltage electrode 5. The center hole 15 can also be designed to be threaded. At this time, the high-voltage needle base 2 and the high-voltage chamber 14 are clearance-matched. By twisting the screw, the screw moves up and down relative to the center hole 15, thereby driving the high-voltage needle base 2 to move up and down.

[0036] In this embodiment, Figure 5 , Figure 6 As shown. A center groove 23 with an upward opening is provided at the center position of the top of the high-voltage needle base 2. The above-mentioned screw can be rotatably installed in the center hole 15. When the screw is turned, the screw does not move up and down relative to the center hole 15. At this time, a screwdriver is inserted into the center groove 23 to prevent the high-voltage needle base 2 from rotating. The screw is threadedly connected to the threaded hole 22. When the screw is turned, the threaded hole 22 moves up and down relative to the screw. Because the screw's up and down freedom is fixed, only the high-voltage needle base 2 moves up and down, so that the up and down position of the high-voltage needle electrode 3 can be changed, thereby achieving the effect of changing the electric field strength.

[0037] In this embodiment, Figure 7The low-voltage electrode 5 is a triangular cone ring structure. When the low-voltage electrode 5 is installed on the front outer wall 12, the low-voltage electrode 5 is pointed upward. The ring-shaped low-voltage electrode 5 is designed to be a triangular cone with the tip facing upward, so that the high-voltage electric field between the low-voltage electrode 5 and the high-voltage electrode module excites plasma.

[0038] In this embodiment, Figure 8 As shown. The ratio of the surface electrical distance L1+L2 to the wall thickness L3 of the high-voltage chamber 14 is less than or equal to 3. In this application, the discharge along the surface is critical and directly related to whether plasma can be generated. The high voltage given by the plasma high-voltage excitation power supply is E, the insulation strength along the surface is Uy, and the breakdown strength of the high-voltage chamber 14 is Ut. To generate plasma normally, Ut>E>Uy is required. Among them, Uy=U0y*(L1+L2), U0y is the breakdown voltage along the surface per unit length, and the unit is kv / cm; Ut=U0t*L3, U0t is the breakdown voltage per unit thickness, and the unit is kv / cm. U0y and U0t are related to the insulating material. For the same insulating material, generally U0y>325*U0t. Through calculation, (L1+L2) / L3<324 all meet the requirements. But in reality, when L3 is constant, Ut is constant, the larger the value of L1+L2, the larger the value of Uy, and the greater the voltage E required for the plasma high-voltage excitation power supply. Therefore, the ratio of (L1+L2) / L3 is relatively small, which is more economical in terms of the requirements of the plasma high-voltage excitation power supply.

[0039] In this embodiment, Fig. 9 As shown. A multi-purpose plasma self-sustaining excitation electrode system comprises a plasma high-voltage excitation power supply, the above-mentioned multi-purpose plasma self-sustaining excitation electrode, the low-voltage electrode 5 is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply, and the low-voltage electrode 5 is grounded, and the high-voltage electrode module of the above-mentioned electrode is electrically connected to the high-voltage end of the plasma high-voltage excitation power supply. When the high-voltage electrode module is connected to the high voltage of the external plasma high-voltage excitation power supply, and the low-voltage electrode 5 is connected to the low voltage of the external plasma high-voltage excitation power supply and grounded, at this time, the adjustment ring 4 is adjusted up and down to drive the low-voltage electrode 5 to move up and down, and then the electrical distance along the upper surface of the insulating support 1 between the high-voltage electrode module and the low-voltage electrode is adjusted, and a first plasma 7 is formed on the upper surface of the insulating support 1. The first plasma 7 formed is a self-sustaining stable excitation, uniformly dispersed, low-temperature plasma in the atmospheric environment, and the shape of the first plasma 7 is a circular ring. The electrical distance refers to the shortest distance from the discharge surface at the upper end of the high-voltage electrode module to the top of the low-voltage electrode 5 along the surface of the insulating support 1. The plasma generated in this mode is self-sustaining excitation, and the plasma is circularly uniformly dispersed, which can be used for air purification, ozone production, viewing and other purposes.

[0040] In this embodiment, Fig.10As shown. A multi-purpose plasma self-sustaining excitation electrode system comprises a plasma high-voltage excitation power supply, an external conductor 9, and the above-mentioned multi-purpose plasma self-sustaining excitation electrode, wherein the low-voltage electrode 5 is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply, and the low-voltage electrode 5 is grounded; the external conductor 9 is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply and is grounded; the high-voltage electrode module of the above-mentioned electrode is electrically connected to the high-voltage end of the plasma high-voltage excitation power supply. When the externally grounded external conductor 9 (such as metal, liquid, human skin, etc.) approaches the high-voltage electrode module, and the electrical distance between the external conductor 9 and the high-voltage electrode module is less than the electrical distance along the upper surface of the insulating support 1, a second plasma 8 is formed on the upper surface of the insulating support 1, and the formed second plasma 8 is located between the high-voltage electrode module and the external conductor 9, and the second plasma 8 is conical. In this mode, plasma can only be generated after an external object approaches. Moving the external object or the multi-purpose plasma self-sustaining excitation electrode can be used for large-area surface plasma treatment, beauty, sterilization and other purposes. Similarly, by selecting other background gases and pressures, similar effects can be produced by adjusting the electrode distance or the external excitation voltage.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-purpose plasma self-sustaining excitation electrode, characterized in that: The invention comprises an insulating support (1), a high-voltage electrode module, an adjustment ring (4), and a low-voltage electrode (5); a high-voltage cavity (14) with an opening facing upward is arranged in the insulating support (1); the high-voltage electrode module is installed in the high-voltage cavity (14); a cylindrical front end outer wall (12) is arranged at the upper part of the insulating support (1); the circular adjustment ring (4) and the circular low-voltage electrode (5) are tightly fitted on the front end outer wall (12); the adjustment ring (4) for adjusting the upper and lower positions of the low-voltage electrode (5) is located at the lower end of the low-voltage electrode (5); the insulating support (1) is made of insulating material, and the high-voltage electrode module and the low-voltage electrode (5) are made of conductive material; The ratio of the surface electrical distance L1+L2 to the wall thickness L3 of the high-pressure chamber (14) is less than or equal to 3.

2. The multi-purpose plasma self-sustaining excitation electrode according to claim 1, characterized in that: A stepped shaft (11) is arranged at the lower end of the front end outer wall (12), an outer thread is arranged on the outer wall of the stepped shaft (11), and the adjusting ring (4) is installed on the stepped shaft (11) in a threaded connection manner.

3. The multi-purpose plasma self-sustaining excitation electrode according to claim 1, characterized in that: The high-voltage electrode module comprises a high-voltage needle base (2) and a high-voltage needle electrode (3); the high-voltage needle base (2) is installed in the high-voltage chamber (14), and the high-voltage needle electrode (3) is fixed to the high-voltage needle base (2) facing upward.

4. The multi-purpose plasma self-sustaining excitation electrode according to claim 3, characterized in that: The upper end surface of the high-voltage needle base (2) is evenly provided with a plurality of pinholes (21) in a circular array, and the high-voltage needle electrode (3) is fastened into each pinhole (21).

5. The multi-purpose plasma self-sustaining excitation electrode according to claim 3, characterized in that: The multi-purpose plasma self-sustaining excitation electrode further comprises a screw rod for adjusting the upper and lower positions of the high-voltage needle base (2); a center hole (15) is arranged at the bottom of the insulating support (1); the center hole (15) passes through the bottom of the insulating support (1) and the high-voltage chamber (14); a threaded hole (22) is arranged at the center position of the bottom end of the high-voltage needle base (2); the screw rod passes through the center hole (15) and cooperates with the threaded hole (22).

6. The multi-purpose plasma self-sustaining excitation electrode according to claim 5, characterized in that: A central groove (23) with an opening facing upward is provided at the top center of the high-pressure needle base (2).

7. The multi-purpose plasma self-sustaining excitation electrode according to claim 1, characterized in that: The low-voltage electrode (5) is a triangular conical ring structure. When the low-voltage electrode (5) is mounted on the front end outer wall (12), the low-voltage electrode (5) is arranged to have a sharp corner toward the upper end.

8. A multi-purpose plasma self-sustaining excitation electrode system, characterized in that: It comprises a plasma high-voltage excitation power supply and a multi-purpose plasma self-sustaining excitation electrode as described in any one of claims 1 to 7, wherein the low-voltage electrode (5) is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply and the low-voltage electrode (5) is grounded, and the high-voltage electrode module is electrically connected to the high-voltage end of the plasma high-voltage excitation power supply.

9. A multi-purpose plasma self-sustaining excitation electrode system, characterized in that: It comprises a plasma high-voltage excitation power supply, an external conductor (9), and a multi-purpose plasma self-sustaining excitation electrode as described in any one of claims 1 to 7, wherein the low-voltage electrode (5) is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply, and the low-voltage electrode (5) is grounded; the external conductor (9) is electrically connected to the low-voltage end of the plasma high-voltage excitation power supply and is grounded; and the high-voltage electrode module is electrically connected to the high-voltage end of the plasma high-voltage excitation power supply.

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