Atmospheric pressure in-situ tunable discharge area plasma discharge device

Abstract

The application discloses a kind of atmospheric pressure in situ adjustable discharge area plasma discharge device, including upper insulating fixed dielectric plate, lower insulating fixed dielectric plate, support column, insulating dielectric tube, high voltage electrode, ground electrode, balance nut, high voltage electrode integration board and ground electrode integration board, the upper and lower of high voltage electrode integration board, the upper and lower of ground electrode integration board are equipped with balance nut, and balance nut is used to control the height position of high voltage electrode integration board and ground electrode integration board.According to the need of discharge, the discharge area and shape are changed by adjusting balance nut or changing the size of discharge device, which enhances the convenience and flexibility of use.

Description

Technical Field

[0001] This invention relates to a discharge device, and more particularly to a plasma discharge device that can be used for space disinfection and sterilization. Background Technology

[0002] With the development of plasma technology, its applications are increasing. In the past decade, plasma sterilization technology has become a global trend. Plasma sterilization indeed has significant application value. This sterilization method is low-cost, requires simple equipment, has high sterilization efficiency, and does not produce secondary pollution after treatment.

[0003] However, traditional atmospheric pressure plasma discharge devices suffer from problems such as low preparation efficiency, instability of the device, structural deformation caused by device heating, and easy damage. Summary of the Invention

[0004] The purpose of this invention is to provide a plasma discharge device with adjustable discharge area at atmospheric pressure, which produces low-temperature plasma with large area, high density, and good uniformity; it has a reasonable structure, good heat dissipation, and the discharge area can be changed in situ, thus achieving efficient space sterilization.

[0005] The technical solution of the present invention is as follows: an atmospheric pressure-adjustable discharge area plasma discharge device, comprising an upper insulating fixed dielectric plate, a lower insulating fixed dielectric plate, a support column, an insulating dielectric tube, a high-voltage electrode, a ground electrode, a balance nut, a high-voltage electrode integrated plate, and a ground electrode integrated plate.

[0006] The insulating dielectric tube is located between the upper insulating fixed dielectric plate and the lower insulating fixed dielectric plate. Support columns are provided on both sides of the insulating dielectric tube. The high-voltage electrode integrated plate is located above the upper insulating fixed dielectric plate, and the ground electrode integrated plate is located below the lower insulating fixed dielectric plate. Balance nuts are provided above and below the high-voltage electrode integrated plate and above and below the ground electrode integrated plate. The balance nuts are threadedly connected to the support columns. The balance nut at the upper end of the support column is used to adjust the height position of the high-voltage electrode integrated plate, and the balance nut at the lower end of the support column is used to adjust the height position of the ground electrode integrated plate, thereby changing the discharge area in situ.

[0007] The upper insulating fixing dielectric plate includes a high-voltage electrode insulating fixing dielectric plate and an insulating fixing dielectric plate from top to bottom, and the high-voltage electrode insulating fixing dielectric plate and the insulating fixing dielectric plate are sequentially bonded to each other; the lower insulating fixing dielectric plate includes a ground electrode fixing dielectric plate and an insulating fixing dielectric plate from bottom to top; the ground electrode insulating fixing dielectric plate and the insulating fixing dielectric plate are sequentially bonded to each other;

[0008] The surfaces of the high-voltage electrode insulating fixing dielectric plate, the ground electrode fixing dielectric plate, and the insulating fixing dielectric plate are provided with an array of through holes. The through holes of the high-voltage electrode insulating fixing dielectric plate and the ground electrode fixing dielectric plate are arranged alternately, and the through holes of the insulating fixing dielectric plate correspond to the sum of the through holes of the high-voltage electrode insulating fixing dielectric plate and the ground electrode fixing dielectric plate.

[0009] An insulating medium tube is inserted into the through hole of the upper insulating fixing medium plate. One end of the insulating medium tube is open and the other end is closed. Each insulating medium tube has insulating powder at the closed end. A high-voltage electrode is inserted into the open direction of each insulating medium tube. One end of each high-voltage electrode is inserted into the insulating powder at the closed end of the corresponding insulating medium tube. The other end of the high-voltage electrode extends to the high-voltage electrode integration plate. The high-voltage electrode integration plate is placed parallel to the upper insulating fixing medium plate and is connected to the support column through a balance nut. The high-voltage electrode integration plate connects each high-voltage electrode together and leads out a high-voltage line to connect to the high-voltage power supply.

[0010] An insulating dielectric tube is inserted into the through hole of the lower insulating fixing dielectric plate. One end of the insulating dielectric tube is open and the other end is closed. Each insulating dielectric tube has insulating powder at its closed end. A ground electrode is inserted into the open direction of each insulating dielectric tube. One end of each ground electrode is inserted into the insulating powder at the closed end of the corresponding insulating dielectric tube. The other end of the ground electrode extends to the ground electrode integration plate. The ground electrode integration plate is placed parallel to the lower insulating fixing dielectric plate and is connected to the support column through a balance nut. The ground electrode integration plate connects each ground electrode together and leads out a ground wire to connect to the ground.

[0011] Furthermore, the diameter of the insulating dielectric tube is the same as the diameter of the through hole in the upper insulating fixing dielectric plate and the through hole in the lower insulating fixing dielectric plate.

[0012] Furthermore, support columns are installed on both sides of the upper insulating fixing medium plate and the lower insulating fixing medium plate, and the two ends of the support columns are connected to the upper insulating fixing medium plate and the lower insulating fixing medium plate in sequence to form a cuboid plate frame structure.

[0013] Furthermore, the through holes on the upper insulating fixing medium plate and the lower insulating fixing medium plate are arranged in two rows of arrayed through holes.

[0014] Furthermore, the upper insulating fixing dielectric plate, the lower insulating fixing dielectric plate, the high voltage electrode integration plate, and the ground electrode integration plate are all rectangular plate structures.

[0015] Furthermore, the high-voltage electrode insulating fixing dielectric plate is one layer, the ground electrode fixing dielectric plate is one layer, and the insulating fixing dielectric plate is multi-layered, such as two to six layers.

[0016] Furthermore, the upper insulating fixing dielectric plate is made of insulating materials such as ceramics, polytetrafluoroethylene, and polyetheretherketone.

[0017] Furthermore, the lower insulating fixing dielectric plate is made of insulating materials such as ceramics, polytetrafluoroethylene, and polyetheretherketone.

[0018] Furthermore, the length of the upper insulating fixing medium plate can be 40-400mm, the width can be 42-100mm, and the thickness can be 3-10mm.

[0019] Furthermore, the length of the lower insulating fixing medium plate can be 40-400mm, the width can be 42-100mm, and the thickness can be 3-10mm.

[0020] Furthermore, the support column is made of polytetrafluoroethylene, polyetheretherketone, or 304 stainless steel.

[0021] Furthermore, the support column includes a central cylindrical portion and threaded portions at both ends, the threaded portions being threadedly connected to the balance nut. The diameter of the threaded portions at both ends can be 4–12 mm, and the length can be 20–40 mm, while the diameter of the central cylindrical portion can be 6–14 mm, and the length can be 96–136 mm.

[0022] Furthermore, the insulating dielectric tube is made of quartz or ceramic.

[0023] Furthermore, the length of the insulating dielectric tube can be 112-132 mm, the outer diameter can be 2-3 mm, and the inner diameter can be 1.3-2.3 mm.

[0024] Furthermore, the insulating powder is made of aluminum oxide, polytetrafluoroethylene, or mica.

[0025] Furthermore, the high-voltage electrode is a copper rod, a tungsten rod, or a titanium rod.

[0026] Furthermore, the diameter of the high-voltage electrode can be 1.2 to 2.2 mm, and the length can be 120 to 142 mm.

[0027] Furthermore, the ground electrode is a copper rod, a tungsten rod, or an iron rod.

[0028] Furthermore, the diameter of the ground electrode can be 1.2 to 2.2 mm, and the length can be 120 to 142 mm.

[0029] Furthermore, the balance nut is made of insulating materials such as polytetrafluoroethylene and polyetheretherketone.

[0030] Furthermore, the high-voltage electrode integration board and the ground electrode integration board are made of PCB material, with a length of 40-400mm and a width of 42-100mm.

[0031] Furthermore, the distance between the high-voltage electrode integrated plate and the upper insulating fixing plate is 5-10 mm, and the distance between the ground electrode integrated plate and the lower insulating fixing plate is 5-10 mm.

[0032] Furthermore, the high-voltage power supply is an AC power supply or a pulse power supply.

[0033] Furthermore, the peak-to-peak voltage adjustment range of the AC power supply is 0–20kV, and the frequency adjustment range is 1–30kHz.

[0034] Furthermore, the voltage peak-to-peak value adjustment range of the pulse power supply is 0–20kV, and the frequency adjustment range is 1–20kHz.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] 1. Under atmospheric pressure conditions, the present invention utilizes the low temperature of plasma generated by air. The electrode arrangement (such as each discharge unit consisting of 4 holes in an insulating fixed dielectric plate) adopts a clockwise cyclic arrangement of high voltage electrode, ground electrode, high voltage electrode, and ground electrode. Compared with the plasma generated by the traditional staggered arrangement of high voltage electrode and ground electrode, the plasma generated has a more uniform spatial distribution, higher density, and can discharge for a longer period of time at the same power.

[0037] 2. Compared with traditional dielectric barrier discharge devices, this device has a more sophisticated structure. The upper and lower insulating fixing dielectric plates adopt a multi-layer structure, which has good heat dissipation performance, solves the problem of device deformation caused by long-term discharge, and extends the device's lifespan. On the other hand, the high-voltage electrode assembly is fixed by different hole positions of the high-voltage electrode insulating fixing dielectric plate and the ground electrode assembly is fixed by different hole positions of the ground electrode insulating fixing dielectric plate, which makes installation convenient and has good stability.

[0038] 3. The discharge area and shape can be changed by adjusting the balance nut or changing the size of the discharge device according to the discharge requirements, which enhances the convenience and flexibility of use.

[0039] 4. The device is easy to install, has good stability, low energy consumption, and high efficiency. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1This is a schematic diagram of the overall structure of a plasma discharge device with in-situ adjustable discharge area under atmospheric pressure according to the present invention.

[0042] Figure 2 This is a top view of the high-voltage electrode insulating fixing dielectric plate of an atmospheric pressure-adjustable discharge area plasma discharge device according to the present invention.

[0043] Figure 3 This is a top view of the ground electrode fixing dielectric plate of an atmospheric pressure-adjustable discharge area plasma discharge device according to the present invention.

[0044] Figure 4 This is a top view of the insulating fixed dielectric plate of an atmospheric pressure-adjustable discharge area plasma discharge device according to the present invention.

[0045] Among them: 1. Upper insulating fixing dielectric plate, 2. Lower insulating fixing dielectric plate, 3. Support column, 4. Insulating dielectric tube, 5. High voltage electrode, 6. Ground electrode, 7. High voltage electrode integrated plate, 8. Ground voltage electrode integrated plate, 9. Balance nut, 10. Support column hole, 11. High voltage electrode hole, 12. Ground electrode hole, 13. High voltage electrode insulating fixing dielectric plate, 14. Ground electrode insulating fixing dielectric plate, 15. Insulating fixing dielectric plate, 16. Insulating fixing dielectric plate hole. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0048] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] Example 1

[0050] like Figure 1-4 As shown, an atmospheric pressure-adjustable in-situ plasma discharge device includes an upper insulating fixed dielectric plate 1, a lower insulating fixed dielectric plate 2, a support column 3, an insulating dielectric tube 4, a high-voltage electrode 5, a ground electrode 6, a balance nut 9, a high-voltage electrode integrated plate 7, and a ground electrode integrated plate 8. The insulating dielectric tube 4 is located between the upper insulating fixed dielectric plate 1 and the lower insulating fixed dielectric plate 2. Support columns 3 are provided on both sides of the insulating dielectric tube 4. The high-voltage electrode integrated plate 7 is located above the upper insulating fixed dielectric plate 1, and the ground electrode integrated plate 8 is located below the lower insulating fixed dielectric plate 2. Balance nuts 9 are provided above and below the high-voltage electrode integrated plate 7, and the balance nuts 9 are threadedly connected to the support column 3. The balance nut 9 at the upper end of the support column 3 is used to adjust the height position of the high-voltage electrode integrated plate 7. Balance nuts 9 are provided above and below the ground electrode integrated plate 8, and the balance nuts 9 are threadedly connected to the support column 3. The balance nut 9 at the lower end of the support column 3 is used to adjust the height position of the ground electrode integrated plate 8.

[0051] The upper insulating fixing dielectric plate 1 and the lower insulating fixing dielectric plate 2 are two rectangular plates of equal size. The upper insulating fixing dielectric plate 1 consists of a high-voltage electrode insulating fixing dielectric plate 13 and two insulating fixing dielectric plates 15, which are attached to each other in sequence. The lower insulating fixing dielectric plate 2 consists of a ground electrode insulating fixing dielectric plate 14 and two insulating fixing dielectric plates 15, which are attached to each other in sequence. The surfaces of the high-voltage electrode insulating fixing dielectric plate 13, the ground electrode fixing dielectric plate 14, and the insulating fixing dielectric plate 15 are provided with two rows of arrayed through holes. The through holes of the high-voltage electrode insulating fixing dielectric plate 13 and the ground electrode fixing dielectric plate 14 are staggered. The through holes of the insulating fixing dielectric plate 15 correspond to the sum of the through holes 14 of the high-voltage electrode insulating fixing dielectric plate 13 and the ground electrode fixing dielectric plate.

[0052] Support columns 3 are installed on both sides of the upper insulating fixing medium plate 1 and the lower insulating fixing medium plate 2 through support column holes 10. The two ends of the support columns 3 are connected to the upper insulating fixing medium plate 1 and the lower insulating fixing medium plate 2 respectively, forming a cuboid plate frame structure. An insulating medium tube 4 is inserted into the through hole of the high-voltage electrode insulating fixing medium plate 13 of the upper insulating fixing medium plate 1. The upper end of the insulating medium tube 4 is open and the lower end is closed. The diameter of the insulating medium tube 4 is the same as the diameter of the through hole of the upper insulating fixing medium plate 1. Insulating powder is poured into the closed end of each insulating medium tube 4. A high-voltage electrode 5 is inserted into the open direction of each insulating medium tube 4. One end of each high-voltage electrode 5 is inserted into the insulating powder at the closed end of the corresponding insulating medium tube 4. The other end of the high-voltage electrode 5 extends to the high-voltage electrode integration plate 7. The high-voltage electrode integration plate 7 is placed parallel to the upper insulating fixing medium plate 1. The balance nut 9 is connected to the support column 3. The high-voltage electrode integration plate 7 connects each high-voltage electrode 5 together and leads out a high-voltage wire to connect to the high-voltage power supply. An insulating medium tube 4 is inserted into the through hole of the ground electrode insulating fixing medium plate 14 of the lower insulating fixing medium plate 2. The lower end of the insulating medium tube 4 is open and the upper end is closed. The diameter of the insulating medium tube 4 is the same as the diameter of the through hole of the lower insulating fixing medium plate 2. Insulating powder is poured into the closed end of each insulating medium tube 4. A ground electrode 6 is inserted into the open direction of each insulating medium tube 4. One end of each ground electrode 6 is inserted into the insulating powder at the closed end of the corresponding insulating medium tube 4. The other end of the ground electrode extends to the ground pressure electrode integration plate 8. The ground pressure electrode integration plate 8 is placed parallel to the lower insulating fixing medium plate 2 and is connected to the support column 3 through the balance nut 9. The ground pressure electrode integration plate 8 welds each ground electrode 6 together and leads out a ground wire to ground.

[0053] The upper insulating fixing dielectric plate 1 is made of three layers of ceramic (one layer of high-voltage electrode insulating fixing dielectric plate 13 and two layers of insulating fixing dielectric plate 15), with a length of 200mm, a width of 42mm, and a thickness of 1mm for each ceramic layer. The lower insulating fixing dielectric plate 2 is made of three layers of ceramic (one layer of ground electrode insulating fixing dielectric plate 14 and two layers of insulating fixing dielectric plate 15), with a length of 200mm, a width of 42mm, and a thickness of 1mm for each ceramic layer. The support column 3 is made of 304 stainless steel and includes a threaded portion with a diameter of 6mm at both ends and a length of 40mm, and a cylindrical portion with a diameter of 10mm and a length of 96mm. The threaded portion of the support column 3 is threadedly connected to the balance nut 9. The insulating dielectric tube 4 is made of quartz material, with a length of 112mm, an outer diameter of 2mm, and an inner diameter of 1.3mm. The insulating powder can be made of aluminum oxide. The high-voltage electrode 5 is made of copper rod, with a diameter of 1.2mm and a length of 120mm. The ground electrode 6 is made of copper rod, with a diameter of 1.2 mm and a length of 120 mm. The high-voltage electrode integration plate 7 and the ground electrode integration plate 8 are made of PCB material, with a length of 200 mm and a width of 42 mm. The distance between the high-voltage electrode integration plate 7 and the upper insulating fixing dielectric plate 1, and between the ground electrode integration plate 8 and the lower insulating fixing dielectric plate 2, is 5 mm. The height of the high-voltage electrode integration plate 7 and the ground electrode integration plate 8 is changed by adjusting the balance nut 9, thereby changing the discharge area. The balance nut 9 is made of polytetrafluoroethylene.

[0054] When the device is in operation, it uses AC power as the high-voltage power source, with a peak-to-peak voltage of 10-20kV and a discharge frequency of 10-20kHz.

[0055] Example 2

[0056] like Figure 1-4 As shown, an atmospheric pressure-adjustable in-situ plasma discharge device includes an upper insulating fixed dielectric plate 1, a lower insulating fixed dielectric plate 2, a support column 3, an insulating dielectric tube 4, a high-voltage electrode 5, a ground electrode 6, a balance nut 9, a high-voltage electrode integrated plate 7, and a ground electrode integrated plate 8. The insulating dielectric tube 4 is located between the upper insulating fixed dielectric plate 1 and the lower insulating fixed dielectric plate 2. Support columns 3 are provided on both sides of the insulating dielectric tube 4. The high-voltage electrode integrated plate 7 is located above the upper insulating fixed dielectric plate 1, and the ground electrode integrated plate 8 is located below the lower insulating fixed dielectric plate 2. Balance nuts 9 are provided above and below the high-voltage electrode integrated plate 7, and the balance nuts 9 are threadedly connected to the support column 3. The balance nut 9 at the upper end of the support column 3 is used to adjust the height position of the high-voltage electrode integrated plate 7. Balance nuts 9 are provided above and below the ground electrode integrated plate 8, and the balance nuts 9 are threadedly connected to the support column 3. The balance nut 9 at the lower end of the support column 3 is used to adjust the height position of the ground electrode integrated plate 8.

[0057] The upper insulating fixing dielectric plate 1 and the lower insulating fixing dielectric plate 2 are two rectangular plates of equal size. The upper insulating fixing dielectric plate 1 consists of a high-voltage electrode insulating fixing dielectric plate 13 and six layers of insulating fixing dielectric plates 15, which are sequentially bonded to each other. The lower insulating fixing dielectric plate 2 consists of a ground electrode insulating fixing dielectric plate 14 and six layers of insulating fixing dielectric plates 15, which are sequentially bonded to each other. The surfaces of the high-voltage electrode insulating fixing dielectric plate 13, the ground electrode fixing dielectric plate 14, and the insulating fixing dielectric plate 15 are provided with two rows of arrayed through holes. The through holes of the high-voltage electrode insulating fixing dielectric plate 13 and the ground electrode fixing dielectric plate 14 are staggered. The through holes of the insulating fixing dielectric plate 15 correspond to the sum of the through holes 14 of the high-voltage electrode insulating fixing dielectric plate 13 and the ground electrode fixing dielectric plate.

[0058] Support columns 3 are installed on both sides of the upper insulating fixing medium plate 1 and the lower insulating fixing medium plate 2 through support column holes 10. The two ends of the support columns 3 are connected to the upper insulating fixing medium plate 1 and the lower insulating fixing medium plate 2 respectively, forming a cuboid plate frame structure. An insulating medium tube 4 is inserted into the through hole of the high-voltage electrode insulating fixing medium plate 13 of the upper insulating fixing medium plate 1. The upper end of the insulating medium tube 4 is open and the lower end is closed. The diameter of the insulating medium tube 4 is the same as the diameter of the through hole of the upper insulating fixing medium plate 1. Insulating powder is poured into the closed end of each insulating medium tube 4. A high-voltage electrode 5 is inserted into the open direction of each insulating medium tube 4. One end of each high-voltage electrode 5 is inserted into the insulating powder at the closed end of the corresponding insulating medium tube 4. The other end of the high-voltage electrode 5 extends to the high-voltage electrode integration plate 7. The high-voltage electrode integration plate 7 is placed parallel to the upper insulating fixing medium plate 1. The balance nut 9 is connected to the support column 3. The high-voltage electrode integration plate 7 connects each high-voltage electrode 5 together and leads out a high-voltage wire to connect to the high-voltage power supply. An insulating medium tube 4 is inserted into the through hole of the ground electrode insulating fixing medium plate 14 of the lower insulating fixing medium plate 2. The lower end of the insulating medium tube 4 is open and the upper end is closed. The diameter of the insulating medium tube 4 is the same as the diameter of the through hole of the lower insulating fixing medium plate 2. Insulating powder is poured into the closed end of each insulating medium tube 4. A ground electrode 6 is inserted into the open direction of each insulating medium tube 4. One end of each ground electrode 6 is inserted into the insulating powder at the closed end of the corresponding insulating medium tube 4. The other end of the ground electrode extends to the ground pressure electrode integration plate 8. The ground pressure electrode integration plate 8 is placed parallel to the lower insulating fixing medium plate 2 and is connected to the support column 3 through the balance nut 9. The ground pressure electrode integration plate 8 welds each ground electrode 6 together and leads out a ground wire to ground.

[0059] The upper insulating fixing dielectric plate 1 is made of seven layers of polyetheretherketone (one layer of high-voltage electrode insulating fixing dielectric plate 13 and six layers of insulating fixing dielectric plate 15), with a length of 400mm, a width of 42mm, and a thickness of 1mm for each polyetheretherketone layer. The lower insulating fixing dielectric plate 2 is made of seven layers of polyetheretherketone (one layer of ground electrode insulating fixing dielectric plate 14 and six layers of insulating fixing dielectric plate 15), with a length of 400mm, a width of 42mm, and a thickness of 1mm for each polyetheretherketone layer. The support column 3 is made of 304 stainless steel and includes a threaded portion with a diameter of 6mm at both ends and a length of 40mm, and a cylindrical portion with a diameter of 10mm and a length of 96mm. The threaded portion of the support column 3 is threadedly connected to the balance nut 9. The insulating dielectric tube 4 is made of quartz material, with a length of 112mm, an outer diameter of 2mm, and an inner diameter of 1.3mm. The insulating powder can be made of aluminum oxide. The high-voltage electrode 5 is made of copper rod, with a diameter of 1.2 mm and a length of 120 mm. The ground electrode 6 is made of copper rod, with a diameter of 1.2 mm and a length of 120 mm. The high-voltage electrode integration plate 7 and the ground electrode integration plate 8 are made of PCB material, with a length of 400 mm and a width of 42 mm. The distance between the high-voltage electrode integration plate 7 and the upper insulating fixing dielectric plate 1, and between the ground electrode integration plate 8 and the lower insulating fixing dielectric plate 2, is 5 mm. The height of the high-voltage electrode integration plate 7 and the ground electrode integration plate 8 is changed by adjusting the balance nut 9, thereby changing the discharge area. The balance nut 9 is made of polyetheretherketone (PEEK).

[0060] When the device is running, a pulse power supply is used as the high voltage power supply, with a voltage amplitude of 10-20kV and a discharge frequency of 5-20kHz.

Claims

1. A plasma discharge device with in-situ adjustable discharge area under atmospheric pressure, characterized in that, It includes an upper insulating fixing dielectric plate, a lower insulating fixing dielectric plate, a support column, an insulating dielectric tube, a high-voltage electrode, a ground electrode, a balance nut, a high-voltage electrode integration plate, and a ground electrode integration plate. The insulating dielectric tube is located between the upper insulating fixed dielectric plate and the lower insulating fixed dielectric plate. Support columns are provided on both sides of the insulating dielectric tube. The high-voltage electrode integrated plate is located above the upper insulating fixed dielectric plate, and the ground electrode integrated plate is located below the lower insulating fixed dielectric plate. Balance nuts are provided above and below the high-voltage electrode integrated plate and above and below the ground electrode integrated plate. The balance nuts are threadedly connected to the support columns and are used to adjust the height position of the high-voltage electrode integrated plate and the ground electrode integrated plate. The upper insulating fixing dielectric plate includes a high-voltage electrode insulating fixing dielectric plate and an insulating fixing dielectric plate from top to bottom, and the high-voltage electrode insulating fixing dielectric plate and the insulating fixing dielectric plate are sequentially bonded to each other; the lower insulating fixing dielectric plate includes a ground electrode fixing dielectric plate and an insulating fixing dielectric plate from bottom to top; the ground electrode fixing dielectric plate and the insulating fixing dielectric plate are sequentially bonded to each other; The surfaces of the high-voltage electrode insulating fixing dielectric plate, the ground electrode fixing dielectric plate, and the insulating fixing dielectric plate are provided with an array of through holes. The through holes of the high-voltage electrode insulating fixing dielectric plate and the ground electrode fixing dielectric plate are arranged alternately, and the through holes of the insulating fixing dielectric plate correspond to the sum of the through holes of the high-voltage electrode insulating fixing dielectric plate and the ground electrode fixing dielectric plate. An insulating medium tube is inserted into the through hole of the upper insulating fixing medium plate. One end of the insulating medium tube is open and the other end is closed. Each insulating medium tube has insulating powder at the closed end. A high-voltage electrode is inserted into the open direction of each insulating medium tube. One end of each high-voltage electrode is inserted into the insulating powder at the closed end of the corresponding insulating medium tube. The other end of the high-voltage electrode extends to the high-voltage electrode integration plate. The high-voltage electrode integration plate is placed parallel to the upper insulating fixing medium plate and is connected to the support column through a balance nut. The high-voltage electrode integration plate connects each high-voltage electrode together and leads out a high-voltage line to connect to the high-voltage power supply. An insulating medium tube is inserted into the through hole of the lower insulating fixing medium plate. One end of the insulating medium tube is open and the other end is closed. Each insulating medium tube has insulating powder at the closed end. A ground electrode is inserted into the open direction of each insulating medium tube. One end of each ground electrode is inserted into the insulating powder at the closed end of the corresponding insulating medium tube. The other end of the ground electrode extends to the ground electrode integration plate. The ground electrode integration plate is placed parallel to the lower insulating fixing medium plate and is connected to the support column through a balance nut. The ground electrode integration plate connects each ground electrode together and leads out a ground wire to ground. The high-voltage electrode insulating fixing dielectric plate is one layer, the ground electrode fixing dielectric plate is one layer, and the insulating fixing dielectric plate is multi-layered.

2. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The diameter of the insulating dielectric tube is the same as the diameter of the through hole in the upper insulating fixing dielectric plate and the through hole in the lower insulating fixing dielectric plate.

3. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, Support columns are installed on both sides of the upper and lower insulating fixing medium plates. The two ends of the support columns are connected to the upper and lower insulating fixing medium plates in sequence to form a cuboid plate frame structure.

4. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The through holes on the upper insulating fixing medium plate and the lower insulating fixing medium plate are arranged in two rows of arrays.

5. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The upper insulating fixing dielectric plate, the lower insulating fixing dielectric plate, the high voltage electrode integration plate, and the ground electrode integration plate are all rectangular plate structures.

6. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The high-voltage electrode is a copper rod, a tungsten rod, or a titanium rod; the ground electrode is a copper rod, a tungsten rod, or an iron rod.

7. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The support column includes a central cylindrical portion and threaded portions at both ends, and the threaded portions are connected to the balance nut via threads.

8. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The upper insulating fixing dielectric plate, lower insulating fixing dielectric plate, insulating dielectric tube, and balance nut are made of insulating material; the support column is made of polytetrafluoroethylene, polyetheretherketone, or 304 stainless steel; the high-voltage electrode integration plate and the ground electrode integration plate are made of PCB material.

9. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The upper insulating fixing dielectric plate has a length of 40-400 mm, a width of 42-100 mm, and a thickness of 3-10 mm; the lower insulating fixing dielectric plate has a length of 40-400 mm, a width of 42-100 mm, and a thickness of 3-10 mm; the insulating dielectric tube has a length of 112-132 mm, an outer diameter of 2-3 mm, and an inner diameter of 1.3-2.3 mm; the high-voltage electrode has a diameter of 1.2-2.2 mm and a length of 120-142 mm; the ground electrode has a diameter of 1.2-2.2 mm and a length of 120-142 mm; the high-voltage electrode integration plate and the ground electrode integration plate have a length of 40-400 mm, a width of 42-100 mm, and a thickness of 3-10 mm; the distance between the high-voltage electrode integration plate and the upper insulating fixing plate is 5-10 mm, and the distance between the ground electrode integration plate and the lower insulating fixing plate is 5-10 mm.

10. The atmospheric pressure-adjustable discharge area plasma discharge device according to claim 1, characterized in that, The peak-to-peak voltage adjustment range of the AC power supply is 0~20 kV, and the frequency adjustment range is 1~30 kHz; the peak-to-peak voltage adjustment range of the pulse power supply is 0~20 kV, and the frequency adjustment range is 1~20 kHz.

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