Plasma generating device and air purifier

Abstract

The invention relates to the technical field of air purification, and discloses a plasma generating device and an air purifier, the plasma generating device comprises an electrode structure and a low-voltage connecting plate, the electrode structure comprises an inner electrode, an insulating tube, an outer electrode and a conductive sleeve fixed and coated at at least one end of the outer electrode; the low-voltage connecting plate is fixedly connected with the conductive sleeve and forms electric conduction, the outer electrode and the power source form a conductive path through the conductive sleeve and the low-voltage connecting plate, and the low-voltage connecting plate is a PCB. A large-area, stable and reliable electrical connection point is provided through the conductive sleeve wrapping the end part of the outer electrode, the problems of disordered connection and unstable conduction of the tail part of the existing outer electrode are thoroughly solved, in addition, the PCB is adopted as the low-voltage connection plate, and compared with a common metal plate or a connection wire, the cost is reduced, and the reliability is improved. The problems of power failure caused by insufficient welding of common metal welding spots and conduction failure caused by vibration or temperature and humidity in a traditional connection mode are avoided.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, specifically to plasma generating devices and air purifiers. Background Technology

[0002] With socio-economic development, residents have increasingly higher requirements for residential interior decoration. The large-scale use of decoration and building materials has led to excessive concentrations of pollutants such as formaldehyde and TVOCs in indoor air, impacting people's health. Currently, indoor air pollution purification methods include ventilation, plant purification, microbial methods, physicochemical adsorption, and plasma methods. Because low-temperature plasma contains high-energy electrons, excited-state particles, and active groups, plasma discharge can effectively catalyze the degradation of harmful gases; therefore, it is increasingly being used in air purification and other fields.

[0003] Existing plasma generators typically employ thin carbon fiber or metal wires as external electrodes, spirally wound around an insulating tube. However, these external electrodes usually require a long extension at the end for connection to the power supply, resulting in messy wiring, difficult connections, complex assembly, and poor conductivity, severely impacting the device's efficiency and reliability. Furthermore, existing electrode structures mostly connect the external electrodes to the power supply directly via welded wires, which is not only messy but also difficult to weld, time-consuming to assemble, and the weld quality is greatly affected by the operator's skill level and welding parameters, making it difficult to guarantee consistency during mass production. Summary of the Invention

[0004] In view of this, the present invention provides a plasma generating device and an air purifier to solve the problem that the end of the external electrode in the electrode structure of the prior art needs to reserve a long extension section for connection with the power supply, resulting in messy wiring and complex connection structure.

[0005] In a first aspect, the present invention provides a plasma generating apparatus, comprising: The electrode structure includes an insulating tube, an inner electrode, an inner electrode inserted inside the insulating tube, an outer electrode spirally wound around the outside of the insulating tube, and a conductive sleeve fixed and covering at least one end of the outer electrode. The low-voltage connection board is fixedly connected to the conductive sleeve to form an electrical connection. The external electrode forms a conductive path with the power supply through the conductive sleeve and the low-voltage connection board. The low-voltage connection board is a PCB board.

[0006] Beneficial effects: The conductive sleeve is made of conductive material. The outer electrode is connected to the power source through the conductive sleeve. Since the outer electrode wrapped around the insulating tube is relatively thin, it is very difficult and unreliable to connect it directly to the power line. The conductive sleeve covering the end of the outer electrode provides a large-area, stable and reliable electrical connection point, which completely solves the problem of messy connection and unstable conduction at the tail of the existing outer electrode. In addition, the conductive sleeve can also reinforce and protect the inner insulating tube and the end of the outer electrode.

[0007] Furthermore, by replacing the messy traditional soldered wires with a low-voltage connection board, all electrical connections of the electrodes are integrated onto a single board, resulting in neat and standardized wiring, greatly simplifying the internal structure, and achieving standardized and modular electrical connections. The low-voltage connection board also provides clear and reliable interfaces with stable resistance, avoiding problems such as incomplete soldering or missing solder joints that may occur with manual soldering, ensuring the consistency and long-term reliability of the conductivity of all electrodes. Moreover, the low-voltage connection board can be connected to the electrode structure via plug-in or crimping methods, significantly improving assembly efficiency and reducing production costs and reliance on worker skills.

[0008] Furthermore, by using a PCB board as a low-voltage connection board, compared to using a metal plate or connecting wire, it avoids common problems in traditional connection methods such as poor soldering of metal solder joints leading to no power supply, and susceptibility to vibration or temperature and humidity affecting conductivity failure. This significantly improves connection reliability and speeds up assembly. The superior conductivity and excellent mechanical strength of the PCB board can improve electrode conductivity between the external and internal electrodes, thereby improving the reliability and service life of the electrode structure.

[0009] In one alternative embodiment, the conductive sleeve is made of copper foil or conductive adhesive. Beneficial effects: Copper foil possesses excellent conductivity and mechanical strength, allowing it to be firmly wrapped around the electrode ends through hot pressing and other methods, forming a durable and reliable electrical interface. This completely solves problems such as poor connection and easy oxidation caused by direct welding or binding. Conductive adhesive, on the other hand, has good adhesion and flexibility, curing at room temperature. It is particularly suitable for irregular surfaces, better adapting to manufacturing tolerances, further simplifying the assembly process, and providing good shock resistance. Whether using copper foil or conductive adhesive, the conductive sleeve can form a large-area, low-resistance, stable contact with the spiral-shaped, slender external electrode (such as carbon fiber) and the low-voltage connecting plate, facilitating electrical connections. Furthermore, replacing the original messy tail wires and welding with copper foil or conductive adhesive makes the electrode ends neat and standardized, eliminating quality fluctuations caused by individual operational differences and improving product consistency and aesthetics.

[0010] In one alternative embodiment, the two ends of the conductive sleeve are respectively covered with insulating adhesive and fixed to the outside of the insulating tube.

[0011] Beneficial effects: By using insulating adhesive to firmly bond both ends of the conductive sleeve to the insulating tube, the conductive sleeve is prevented from loosening or warping due to long-term use or vibration. Simultaneously, the insulating adhesive covering both ends ensures that current can only be drawn from the predetermined points on the conductive sleeve, effectively avoiding corona discharge or short circuits with adjacent components that may occur due to concentrated electric fields at the edges of the conductive sleeve, thus improving safety.

[0012] In one alternative embodiment, a conductive sleeve covers one end of the outer electrode; The electrode structure has multiple sets arranged in a linear interval, and multiple conductive sleeves are provided accordingly, with multiple conductive sleeves provided at the same end of the multiple sets of electrode structures; The low-voltage connecting plate is located on the side of the multiple electrode structures that have conductive sleeves, and the low-voltage connecting plate is fixedly connected to all the conductive sleeves and electrically conductive. Beneficial effects: The multiple electrode structures are linearly arranged, with all conductive sleeves located at the same end and connected by a single low-voltage connecting plate. All electrical connections are concentrated on the same side of the electrodes, allowing for single-sided potting of epoxy resin, significantly reducing stress and avoiding the problem of uneven stress and easy breakage of the insulating tube caused by potting on both sides in existing technologies. This significantly improves product yield and long-term reliability. Furthermore, the same-side layout makes the device structure very compact and neat, with a more aesthetically pleasing appearance.

[0013] In one optional embodiment, multiple sets of the electrode structures are arranged in a single row with equal spacing; the diameter of the outer electrode is set to d1, and the spacing between two adjacent sets of the electrode structures is set to d2, wherein 1.5d1≤d2≤5d1; the number of the electrode structures is 8 to 14 sets.

[0014] Beneficial effects: By arranging the electrode structure in a single row, the problem of airflow obstruction that can easily occur with multi-row arrangements can be avoided. Furthermore, the design of equidistant arrays of multiple electrode structures ensures uniform discharge throughout the entire electrode safety zone. In addition, by setting the spacing between the electrode structures within the aforementioned range, the problem of arcing caused by two electrode structures being too close together can be effectively avoided. Simultaneously, it also prevents two electrode structures from being too far apart, resulting in a small effective discharge area and some airflow passing directly through without passing through the plasma region, leading to low purification efficiency.

[0015] In one alternative embodiment, the low-voltage connection plate is provided with a bayonet, which is interference-fitted onto the outer periphery of the conductive sleeve. Beneficial effects: The low-voltage connection plate is directly snapped onto the conductive sleeve through an interference fit, achieving a weld-free and rapid connection. During assembly, reliable electrical contact and mechanical fixation can be achieved simply by pressing, further improving the assembly speed. Moreover, when it is necessary to replace a single electrode or the low-voltage connection plate, it can be easily and quickly disassembled and installed, facilitating maintenance and replacement.

[0016] In one optional embodiment, the plasma generating apparatus further includes: The high-voltage connection board has an inner electrode that extends from the end near the conductive sleeve through the insulating tube and forms a conductive path with the power supply through the high-voltage connection board. The high-voltage connection board is a PCB board. Beneficial effects: By concentrating the electrical connection of the external and internal electrodes on one side, all connection points can be fixed by epoxy resin potting on only one side. The single-sided potting is more convenient to operate than the existing double-sided potting. In addition, the single-sided potting can effectively ensure that the insulating tube will not be broken due to stress compression from the double-sided potting. This improves process efficiency and ensures the conductivity of the electrode structure.

[0017] In one alternative embodiment, the inner electrode has an extension that extends out of the insulating tube; The high-voltage connection plate has connection holes, and the protruding section is inserted into the connection holes. Beneficial effects: The protruding section of the inner electrode is inserted into the connection hole of the high voltage connection plate, which can ensure the precise alignment of each inner electrode and form a stable electrical connection through the tight fit between the connection hole and the inner electrode. At the same time, it realizes the rapid and parallel assembly of the high voltage end and completes the efficient assembly closed loop of the entire device with "high and low voltage double-side plate connection".

[0018] In one optional embodiment, the winding pitch of the outer electrode is set to D, the end of the inner electrode that extends out of the insulating tube is the protruding end, and the end of the outer electrode that has a conductive sleeve is the electrical connection end. The protruding end and the electrical connection end are located on the same side of the electrode structure, and the distance between them is d, where d > 2D.

[0019] Beneficial effects: By adopting the above-described dimensional design, sufficient electrical safety distance is ensured, establishing a adequate safety insulation distance between the leads of the inner electrode (high voltage) and the outer electrode (ground). This effectively prevents the risk of air breakdown and arcing caused by excessive proximity between the two electrodes, fundamentally eliminating safety hazards. Furthermore, sufficient safety distance helps to make the electric field distribution at the electrode ends more gradual, optimizing the electric field distribution and reducing electric field distortion, thereby promoting the stable initiation and maintenance of glow discharge and improving discharge efficiency.

[0020] In one alternative implementation, the PCB board is a flexible PCB board or a rigid PCB board. Beneficial effects: Flexible PCBs can adapt to installation spaces of different shapes, improving the applicability of modules. Furthermore, flexible PCBs have excellent bending performance, enabling reliable connections in confined spaces, making them particularly suitable for the design of compact plasma generators. Rigid PCBs, on the other hand, possess good strength and can effectively support and stabilize the electrode structure.

[0021] Secondly, the present invention also provides an air purifier, comprising: The housing has an air inlet and an air outlet. The aforementioned plasma generator is installed on the airflow path between the air inlet and the air outlet. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the plasma generating device in an embodiment of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 1 A schematic diagram of the structure after removing the top cover; Figure 4 for Figure 3 A magnified view of a portion of the image; Figure 5 This is a schematic diagram of the main structure of the mounting bracket in this embodiment; Figure 6 for Figure 3 Another structural diagram from another angle; Figure 7 for Figure 6 A magnified view of a portion of the image; Figure 8 for Figure 3 A schematic diagram of the rear structure; Figure 9 This is a schematic diagram of the electrode structure in an embodiment of the present invention; Figure 10 This is a schematic diagram of the pressure plate structure in an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the elastic buffer in an embodiment of the present invention; Figure 12 This is a schematic diagram of the low-pressure connecting plate in an embodiment of the present invention; Figure 13 This is a schematic diagram of the high-voltage connection plate in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures: 51. Plasma generator; 511. Mounting bracket; 5111. Mounting bracket body; 51111. Slot; 51112. Cable routing channel; 51113. First limiting rib; 51114. Second limiting rib; 5112. Top cover; 5113. Bottom cover; 512. Electrode structure; 5121. Inner electrode; 5122. Insulating tube; 5123. Outer electrode; 5124. Conductive sleeve; 5125. Insulating adhesive; 513. Low-voltage connecting plate; 5131. Bayonet; 514. High-voltage connection plate; 5141. Connection hole; 515, Elastic buffer; 5151, Electrical limit groove; 5152, Through hole; 5153, First mating groove; 5154, Second mating groove; 516. Pressure plate; 5161. Buckle; 517. Wire. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Existing plasma generators typically use flexible metal or carbon fiber filaments as external electrodes, spirally wound around an inner electrode covered by an insulating tube. The external electrode is then connected to a power source via an extension, resulting in messy connections, complex structures, and difficult assembly. Furthermore, the ends connecting the external electrode to the power source are usually located on opposite sides of the electrode structure, leading to complex connection processes and unstable conductivity. Additionally, potting with epoxy resin requires treatment of both sides, increasing manufacturing costs and causing high stress on both sides of the electrode structure, making it prone to breakage and resulting in unstable conductivity.

[0030] The following is combined with Figures 1 to 13 The following describes embodiments of the present invention.

[0031] According to an embodiment of the present invention, in one aspect, such as Figure 3 , Figure 6 , Figure 7 and Figure 9 As shown, the present invention provides a plasma generating device 51, including an electrode structure 512. The electrode structure 512 includes an inner electrode 5121, an inner electrode 5121 passing through an insulating tube 5122, an outer electrode 5123 spirally wound around the insulating tube 5122, and a conductive sleeve 5124 fixed and covering at least one end of the outer electrode 5123. The plasma generating device 51 includes a low-voltage connecting plate 513, which is fixedly connected to the conductive sleeve 5124 to form an electrical connection. The outer electrode 5123 forms a conductive path with the power supply through the conductive sleeve 5124 and the low-voltage connecting plate 513, and the low-voltage connecting plate 513 is a PCB board.

[0032] In some embodiments, the conductive sleeve 5124 is made of conductive material, and the outer electrode 5123 is connected to the power supply through the conductive sleeve 5124. Since the outer electrode 5123, which is wrapped around the insulating tube 5122, is relatively thin, it is very difficult and unreliable to connect it directly to the power line. The conductive sleeve 5124 covering the end of the outer electrode 5123 provides a large-area, stable and reliable electrical connection point, which completely solves the problem of messy connection and unstable conduction at the tail of the existing outer electrode 5123. In addition, the conductive sleeve 5124 can also reinforce and protect the inner insulating tube 5122 and the end of the outer electrode 5123.

[0033] Furthermore, by replacing the messy traditional soldered wires with a low-voltage connection board 513, the electrical connections of all electrodes are integrated onto a single board, resulting in neat and standardized wiring, greatly simplifying the internal structure, and achieving standardized and modular electrical connections. Moreover, the low-voltage connection board 513 provides a clear and reliable interface with stable resistance, avoiding problems such as incomplete soldering or missing solder joints that may occur with manual soldering, ensuring the consistency and long-term reliability of the conductivity of all electrodes. Furthermore, the low-voltage connection board 513 can be connected to the electrode structure 512 via plug-in or crimping, significantly improving assembly efficiency and reducing production costs and reliance on worker skills.

[0034] Furthermore, by using a PCB board (i.e., a printed circuit board) as the low-voltage connection board 513, compared with ordinary metal plates or connecting wires, the common problems of metal solder joint failure leading to no power supply and conductivity failure due to vibration or temperature and humidity are avoided in traditional connection methods. This significantly improves connection reliability and speeds up assembly. The superior conductivity and excellent mechanical strength of the PCB board can improve the electrode conductivity between the outer electrode 5123 and the inner electrode 5121, thereby improving the reliability and service life of the electrode structure 512.

[0035] Furthermore, in the electrode structure 512 provided in this embodiment, the original extended portion of the outer electrode 5123 is removed. Instead of connecting the extended portion of the outer electrode 5123 to the metal component by solder, the electrical connection is achieved by covering the end of the outer electrode 5123 with a conductive sleeve 5124. This makes the entire electrode structure 512 look neater and reduces phenomena such as poor electrode conductivity. In addition, there is no need to comb the tail of the outer electrode 5123 during connection, which effectively solves the problem of messy connection at the tail of the outer electrode 5123.

[0036] In some embodiments, the conductive sleeve 5124 is made of copper foil or conductive adhesive.

[0037] In the above embodiments, copper foil possesses excellent conductivity and mechanical strength, and can be firmly wrapped around the electrode end through methods such as hot pressing to form a durable and reliable electrical interface, completely solving problems such as poor connection and easy oxidation caused by direct welding or binding. Conductive adhesive, on the other hand, has good adhesion and flexibility, and can cure at room temperature, making it particularly suitable for irregular surfaces. It can better adapt to manufacturing tolerances, further simplifying the assembly process, while providing good shock resistance. Whether using copper foil or conductive adhesive, the conductive sleeve 5124 can form a large-area, low-resistance stable contact with the spiral-shaped thin external electrode 5123 (such as carbon fiber) and the low-voltage connecting plate 513, facilitating electrical connection. Moreover, using copper foil or conductive adhesive to replace the original messy tail wire combing and welding makes the electrode end neat and standardized, eliminating quality fluctuations caused by individual operational differences and improving product consistency and aesthetics.

[0038] Preferably, the conductive sleeve 5124 is made of copper foil. The smooth surface of the copper foil is more conducive to the subsequent epoxy resin potting operation, allowing the potting resin to cover evenly and effectively preventing the connection points from failing due to environmental humidity, oxidation, or mechanical stress, resulting in lifting or detachment. Moreover, copper foil is a cathodic electrolytic material, and as a conductor in the PCB, it easily adheres to the insulating tube 5122. Furthermore, the copper foil is fixed to the outside of the insulating tube 5122 by thermal soldering, and both ends of the copper foil are wrapped with insulating adhesive 5125, which can more effectively prevent the copper foil from lifting or detaching over time, thus affecting the discharge stability.

[0039] Of course, as an alternative implementation, conductive adhesive can be used instead of copper foil for connection. Conductive adhesive has good conductivity and adhesion properties, can be cured at room temperature, and is suitable for connection surfaces with complex shapes, further improving the stability and adaptability of the connection.

[0040] In some embodiments, the end of the outer electrode 5123 without the conductive sleeve 5124 is covered by insulating glue 5125, and both ends of the insulating tube 5122 are also covered by insulating glue 5125. One end of the insulating tube 5122 is through which the inner electrode 5121 passes, and the other end is completely covered by insulating glue 5125 to isolate air.

[0041] In some embodiments, the insulating tube 5122 is a ceramic tube.

[0042] In the above embodiments, the insulating tube 5122 is made of ceramic material (such as alumina ceramic), which has extremely high insulation strength and arc resistance. It can effectively withstand the high voltage generated by glow discharge, prevent breakdown short circuit between electrodes, and ensure the safety and stability of the discharge process.

[0043] In other alternative embodiments, the insulating tube 5122 may also be a quartz tube, a glass tube, or a polytetrafluoroethylene tube.

[0044] In some embodiments, such as Figure 9 As shown, the two ends of the conductive sleeve 5124 are covered and fixed to the outside of the insulating tube 5122 by insulating glue 5125.

[0045] In the above embodiment, by using insulating adhesive 5125 to firmly bond both ends of the conductive sleeve 5124 to the insulating tube 5122, the conductive sleeve 5124 is prevented from loosening or warping due to long-term use or vibration. Simultaneously, the covering of both ends with insulating adhesive 5125 ensures that current can only be drawn from predetermined locations on the conductive sleeve 5124, effectively preventing corona discharge or short circuits with adjacent components that may occur at the edges of the conductive sleeve 5124 due to concentrated electric fields, thus improving safety.

[0046] Preferably, in this embodiment, the insulating adhesive 5125 is epoxy resin.

[0047] In some embodiments, the winding pitch of the outer electrode 5123 is set to D, the end of the inner electrode 5121 that extends out of the insulating tube 5122 is called the protruding end, and the end of the outer electrode 5123 that is provided with the conductive sleeve 5124 is called the electrical connection end; the protruding end and the electrical connection end are located on the same side of the electrode structure 512, and the distance between them is d, where d > 2D.

[0048] By adopting the above-described dimensional design, a sufficient electrical safety distance is ensured, establishing a adequate safety insulation distance between the leads of the inner electrode 5121 (high voltage) and the outer electrode 5123 (ground). This effectively prevents the risk of air breakdown and arcing due to excessive proximity between the two electrodes, fundamentally eliminating safety hazards. Furthermore, the sufficient safety distance helps to make the electric field distribution at the electrode ends more gradual, optimizing the electric field distribution and reducing electric field distortion, thereby promoting the stable initiation and maintenance of glow discharge and improving discharge efficiency.

[0049] In a more specific example, the winding pitch D is 3 mm, and d is between 15 mm and 20 mm, preferably d is 17 mm.

[0050] In some embodiments, the conductive sleeve 5124 covers one end of the outer electrode 5123; the electrode structure 512 has multiple sets arranged in a linear interval, and the conductive sleeve 5124 is provided in a corresponding manner, and the multiple conductive sleeves 5124 are provided at the same end of the multiple sets of electrode structures 512; the low-voltage connecting plate 513 is provided on the side of the multiple sets of electrode structures 512 where the conductive sleeves 5124 are provided, and is fixedly connected to and electrically conductive with all the conductive sleeves 5124.

[0051] In the above embodiments, multiple electrode structures 512 are arranged linearly, and all conductive sleeves 5124 are located at the same end and are uniformly connected by a low-voltage connecting plate 513. All electrical connections are concentrated on the same side of the electrodes, so that only one side needs to be treated when potting epoxy resin, achieving single-sided potting. This significantly reduces stress and avoids the problem of uneven stress on both sides of the insulating tube 5122 and easy breakage caused by potting on both sides in the prior art, which significantly improves product yield and long-term reliability. Moreover, the same-side layout makes the device structure very compact and regular, and the appearance is more aesthetically pleasing.

[0052] In some embodiments, the axial length of the conductive sleeve 5124 is greater than D, and the end of the outer electrode 5123 is located in the middle of the conductive sleeve 5124. This ensures that the area of ​​the conductive sleeve 5124 is large enough to completely cover the end of the outer electrode 5123 and facilitates connection with the low-voltage connection plate 513.

[0053] In some embodiments, the low-voltage connecting plate 513 is snapped onto the outer periphery of the conductive sleeve 5124.

[0054] In the above embodiments, the low-voltage connecting plate 513 and the conductive sleeve 5124 are connected by a snap-fit ​​method, which is reliable and convenient for disassembly and assembly.

[0055] In some embodiments, such as Figures 1 to 4 , Figure 6 , Figure 7 , Figure 9 , Figure 12 As shown, the low-voltage connecting plate 513 is provided with a bayonet 5131, which is interference-fitted onto the outer periphery of the conductive sleeve 5124. In the above embodiments, the low-voltage connecting plate 513 is directly snapped onto the conductive sleeve 5124 through the interference fit bayonet 5131, realizing a weldless and quick connection. During assembly, reliable electrical contact and mechanical fixation can be achieved simply by pressing, which further improves the assembly speed. Moreover, when it is necessary to replace a single electrode or the low-voltage connecting plate 513, it can be easily and quickly disassembled and installed, which is convenient for maintenance and replacement.

[0056] In some embodiments, the inner electrode 5121 is made of a metal rod or wire, the insulating tube 5122 is made of ceramic, and the outer electrode 5123 is made of metal wire or carbon fiber. A spiral outer electrode 5123 is provided on the outer surface of the insulating tube 5122, forming a columnar DBD structure. The inner electrode 5121 is connected to a high-voltage AC power supply, and the outer electrode 5123 is grounded. Regarding the electrode parameters: the inner electrode 5121 has a diameter of 1 mm, the insulating tube 5122 has a thickness of 0.5 mm, the outer electrode 5123 has a diameter of 0.08 mm, and the pitch is 3 mm. These parameters are optimal; other parameters are also within the scope of this invention. Regarding the number of electrode structures 512, theoretically, it should be greater than or equal to one. The number of electrodes provided in the accompanying drawings of this embodiment is 12, connected in parallel.

[0057] In some embodiments, the plasma generating device 51 further includes: a mounting frame 511 and an elastic buffer 515. The mounting frame 511 forms an electrode mounting area. An electrode structure 512 is installed in the electrode mounting area. The electrode structure 512 includes an insulating tube 5122, an inner electrode 5121 passing through the insulating tube 5122, and an outer electrode 5123 spirally wound around the insulating tube 5122. The elastic buffer 515 is detachably mounted on the mounting frame 511. An electrical limit groove 5151 is formed on the elastic buffer 515. The two ends of the electrode structure 512 are respectively limited and fixed in the electrical limit groove 5151.

[0058] In the above embodiment, the added elastic buffer 515 and the electrical limit groove 5151 formed on the elastic buffer 515 support and position the electrode structure 512. Utilizing the high elasticity of the elastic buffer 515, the electrode structure 512 can be held in place by the elastic buffer 515, thus achieving a fixed position. It also provides good shock absorption for the electrode structure 512. When the device is subjected to transportation vibrations or mechanical impacts during operation, the elastic buffer 515 can effectively absorb and attenuate energy, significantly reducing the risk of cracks or breakage of the electrode structure 512 (especially brittle ceramic insulating tubes) due to stress concentration, thereby improving product reliability and service life. Furthermore, the elastic buffer 515 can be detachably installed onto the mounting bracket 511, facilitating manufacturing and subsequent maintenance and replacement. In addition, the electrical limit groove 5151 precisely limits and fixes both ends of the electrode structure 512, ensuring the stability of the electrode structure position during use of the plasma generator 51 and preventing discharge instability or failure due to loosening.

[0059] Based on the above embodiments, as a further limiting embodiment, such as... Figures 1 to 6 As shown, the mounting bracket 511 is a ring frame structure, and the middle area of ​​the ring frame structure is the electrode mounting area. The mounting bracket 511 can be frame-shaped, circular, polygonal, or other irregular shapes. The specific shape of the mounting bracket 511 can be set according to the actual assembly requirements.

[0060] Based on the above embodiments, as a further limited embodiment, the elastic buffer 515 can be a silicone part, a rubber part, a TPE part, a polyurethane part, or it can also be a composite structure, such as a spring assembly or an airbag part. This embodiment does not limit this.

[0061] Based on the above embodiments, as a further defined embodiment, the elastic buffer 515 can be fixed to the mounting bracket 511 by means of snap-fit, screw, plug-in, pressing, etc.

[0062] In some embodiments, the mounting bracket 511 includes two opposing frames, and two elastic buffers 515 are provided; the two elastic buffers 515 are respectively snapped and limited on the two frames, and the two ends of the electrode structure 512 are respectively limited in the electrical limit grooves 5151 of the two elastic buffers 515.

[0063] In the above embodiment, by mounting the electrode structure 512 on two opposite sides of the mounting bracket 511 and setting elastic buffers 515 on the two sides respectively, the electrode structure 512 can be supported and fixed from both ends at the same time, forming a stable "two-point support" structure, which effectively prevents the electrode from warping or shaking in the length direction, ensures its accurate position in the airflow channel, and ensures uniform and stable discharge effect.

[0064] Based on the above embodiments, as a further defined embodiment, the frame includes an upper frame and a lower frame spaced apart vertically, and the frame is a vertically arranged plate-like structure. An elastic buffer 515 is fixedly disposed on one side of the plate-like frame.

[0065] In some embodiments, the mounting bracket 511 includes a mounting bracket body 5111 and an upper cover 5112 and a lower cover 5113 disposed at the upper and lower ends of the mounting bracket body 5111. The mounting bracket body 5111 is annular, with an electrode mounting area formed in the middle of the mounting bracket body 5111. The electrode structure 512 is mounted on the mounting bracket body 5111. The mounting bracket body 5111 includes an upper frame and a lower frame, and two side frames connected to both sides of the upper and lower frames. The upper end of the electrode structure 512 is mounted on the upper frame, and the lower end is mounted on the lower frame. The upper cover 5112 and the lower cover 5113 of the mounting bracket 511 are fitted onto the upper and lower ends of the mounting bracket body 5111, and at least cover the electrode structure 512 and the elastic buffer member 515.

[0066] By installing upper covers 5112 and lower covers 5113 at the top and bottom of the mounting frame body 5111 respectively, the electrode structure 512, elastic buffer 515, pressure plate 516, high-voltage connection plate 514, and low-voltage connection plate 513 are completely enclosed, effectively preventing moisture, oil, dust, etc. from entering the interior, protecting the electrode structure 512 from corrosion, extending the service life of the equipment, and preventing accidental contact with live parts, thus improving the safety protection level of the equipment. They also provide cushioning protection, preventing the electrode structure 512, elastic buffer 515, pressure plate 516, high-voltage connection plate 514, and low-voltage connection plate 513 from loosening or being damaged by collisions with external components due to transportation bumps. Furthermore, the upper covers 5112 and lower covers 5113 fit tightly with the mounting frame body 5111, forming an integral structure that allows for the concealment of internal components, resulting in a simple and aesthetically pleasing appearance and enhancing the overall quality of the product. Furthermore, the clamp design of the upper cover 5112 and the lower cover 5113 facilitates quick installation and removal. When it is necessary to inspect or replace components such as the electrode structure 512 and the elastic buffer 515, it is only necessary to remove the upper cover 5112 or the lower cover 5113 without disassembling the entire mounting bracket 511, which greatly simplifies the maintenance process.

[0067] In some embodiments, such as Figures 3 to 5 , Figure 11 As shown, a first limiting rib 51113 is provided on the frame, and the first limiting rib 51113 extends along the length direction of the frame; the elastic buffer member 515 is provided with a first mating groove 5153 that cooperates with the first limiting rib 51113; a second limiting rib 51114 is provided on the frame, and the second limiting rib 51114 extends along the width direction of the frame; the elastic buffer member 515 is provided with a second mating groove 5154 that cooperates with the second limiting rib 51114. In the above embodiment, the first limiting rib 51113 arranged along the length direction of the frame and the second limiting rib 51114 arranged along the width direction of the frame, under the combined action of the first limiting rib 51113 and the second limiting rib 51114, limit the elastic buffer 515 from multiple dimensions, improve the stability of the elastic buffer 515 structure, ensure that the installation position of the elastic buffer 515 on the mounting bracket 511 is accurate, prevent the elastic buffer 515 from shifting or rotating during installation, play a role in precise positioning and error prevention, and thus ensure the positioning consistency of all electrodes. In addition, the groove and rib mating structure, while providing positioning, also increases the contact area and friction, making the connection between the elastic buffer 515 and the frame more firm, avoiding the possible loosening of the elastic buffer 515 and the mounting bracket 511 under long-term vibration environment, and enhancing the reliability of the connection between the elastic buffer 515 and the mounting bracket 511.

[0068] Based on the above embodiments, as a further defined embodiment, there are multiple second limiting ribs 51114, which are spaced apart along the length direction of the first limiting rib 51113. The first limiting rib 51113 is a long strip of rib arranged horizontally on the frame, and the second limiting ribs 51114 are ribs arranged vertically on the frame. The first limiting ribs 51113 and the second limiting ribs 51114 form a cross rib. The elastic buffer member 515 is a long strip structure that matches the length of the frame. The elastic buffer member 515 has a first mating groove 5153 and a second mating groove 5154 on the side near the frame.

[0069] In some embodiments, the elastic buffer 515 is a rubber strip, and the electrical limit groove 5151 is a U-shaped groove formed on one side of the rubber strip. In the above embodiments, the elastic buffer 515 adopts a rubber strip structure, which is simple in structure and easy to install. The electrical limit groove 5151 adopts a U-shaped groove, which allows the electrode structure 512 to be easily inserted into the electrical limit groove 5151 from the side, making the assembly operation simple and quick. At the same time, the U-shaped structure has a certain degree of tolerance for the diameter of the electrode, and with the elasticity of the rubber strip, it can adapt to small dimensional tolerances to ensure the reliability of clamping. In addition, the U-shaped groove can wrap around the electrode from three directions. When subjected to impacts or vibrations from different directions, it can provide effective buffer protection through the deformation of the rubber strip, resulting in better cushioning and shock absorption.

[0070] Based on the above embodiments, as a further defined embodiment, the distance between the two opposite walls of the U-shaped groove is less than the size of the corresponding mounting part of the electrode structure 512, so as to achieve the limiting and fixing of the electrode structure 512 by means of interference fit.

[0071] In some embodiments, the first limiting rib 51113 is provided with a relief recess at the position corresponding to the electric limit groove 5151 of the elastic buffer 515. This design can play a role in relief and limiting when the elastic buffer 515 is squeezed by the pressure plate 516, thereby further improving the stability of the position of the electrode structure 512.

[0072] In some embodiments, such as Figures 1 to 4 , Figure 8 , Figure 10 As shown, the plasma generating device 51 also includes a pressure plate 516, which is detachably connected to the mounting frame 511 and presses the elastic buffer 515 tightly onto the mounting frame 511. In the above embodiment, the pressure plate 516 ensures that the elastic buffer 515 is always subjected to a clamping force close to the mounting bracket 511, making it tightly fitted to the mounting bracket 511. This prevents the elastic buffer 515 from bouncing off or loosening from its mounting position due to its own elastic recovery or external vibration, further improving the reliability of the fixation. Furthermore, the pressure plate 516 and the mounting bracket 511 are detachably connected, facilitating subsequent disassembly and maintenance.

[0073] Based on the above embodiments, as a further defined embodiment, the elastic buffer 515 is located between the pressure plate 516 and the mounting bracket 511, and the pressure plate 516 can be connected to the mounting bracket 511 by screws or snap-fit.

[0074] Preferably, in this embodiment, the pressure plate 516 and the mounting bracket 511 are snapped together, so that the pressure plate 516 can be disassembled and assembled without the aid of external tools.

[0075] In some specific embodiments, such as Figures 4 to 8As shown, the pressure plate 516 is provided with a buckle 5161, the mounting bracket 511 is provided with a slot 51111, and the elastic buffer 515 is provided with a through hole 5152. The buckle 5161 passes through the through hole 5152 and connects with the slot 51111. In the above embodiment, the pressure plate 516 is connected and engaged with the mounting bracket 511 through the through hole 5152 of the elastic buffer 515 via a snap fastener 5161. This not only enables the assembly of the pressure plate 516, the elastic buffer 515, and the mounting bracket 511 into a single unit, but also ensures that the snap fastener 5161 of the pressure plate 516, after fastening the mounting bracket 511, exerts a squeezing effect on the elastic buffer 515. This causes the elastic buffer 515 to deform under pressure and firmly press against the electrode structure 512, thereby indirectly and effectively pressing and fixing the electrode structure 512. Furthermore, by using the snap fastener 5161 as the connection structure between the pressure plate 516 and the mounting bracket 511, the use of tools such as screwdrivers is eliminated, significantly improving assembly efficiency and making it very suitable for mass production. The snap fastener 5161 also has a certain holding force, effectively ensuring that the pressure plate 516 does not loosen under vibration.

[0076] Based on the above embodiments, as a further defined embodiment, the pressure plate 516 is provided with a plurality of buckles 5161 spaced apart along its length, and the fixing frame is provided with a plurality of slots 51111 correspondingly. The plurality of slots 51111 and the plurality of buckles 5161 are engaged one-to-one, further improving the fixing effect of the pressure plate 516. There are two pressure plates 516, and the two pressure plates 516 are respectively fixed at the upper and lower ends of the electrode structure 512.

[0077] Based on the above embodiments, as a further defined embodiment, the buckle 5161 has two oppositely arranged claws, which are correspondingly engaged and supported on the two opposite edges of the slot 51111, further improving the stability of the engagement.

[0078] In some embodiments, the electrode structure 512 has multiple sets, and the multiple sets of electrode structures 512 are spaced apart along the length direction of the mounting frame 511. The elastic buffer 515 is provided with multiple sets of electrical limit grooves 5151 corresponding to the multiple sets of electrode structures 512. In the above embodiments, the parallel arrangement of multiple electrode structures 512 increases the total area of ​​glow discharge, thereby significantly improving air purification efficiency and processing capacity per unit time, meeting the needs of larger spaces or higher cleanliness levels. Furthermore, the spaced arrangement of multiple electrode structures 512 not only facilitates electrode installation but also promotes smooth airflow through the electrode area, reducing wind resistance and improving purification efficiency. Moreover, by creating multiple electrical limit slots 5151 on a single adhesive strip, multiple electrodes can be installed in parallel and at equal intervals, achieving a modular design for the multiple electrode structures 512. This ensures the neat and uniform arrangement and consistent spacing of the multiple electrode structures 512, promoting uniform electric field distribution, optimizing discharge performance, and resulting in a compact structure.

[0079] Based on the above embodiments, as a further defined embodiment, multiple sets of electrical limit grooves 5151 are formed on the same side of the elastic buffer 515, facilitating the installation of multiple sets of electrode structures 512 from one side. Specifically, the openings of the multiple sets of electrical limit grooves 5151 all face the same side. In this embodiment, the electrode structure 512 is firmly fixed to the mounting bracket 511 using a pressure plate 516 and adhesive strips, thus providing both fixing and shock absorption functions.

[0080] Based on the above embodiments, as a further defined embodiment, the overall module is stably fixed and the structure is compact by pressing the rubber strip and the multiple sets of electrode structures 512 installed on it with the pressure plate 516 in one go.

[0081] In some alternative embodiments, the snap-fit ​​5161 of the pressure plate 516 can be replaced with an elastic clamping structure. Specifically, the pressure plate 516 is provided with an elastic arm structure, which achieves the clamping and fixing of the electrode structure 512 by the deformation of the elastic arm, and the mounting bracket 511 is provided with a corresponding limiting groove to cooperate with the positioning of the elastic arm. This structure can achieve the connection between the pressure plate 516 and the mounting bracket 511 without drilling holes, further simplifying the assembly process and enhancing the sealing performance of the module.

[0082] Because the insulating tube 5122 needs to be resistant to breakdown and electrochemical corrosion, ceramic is the best choice. Therefore, in this embodiment, the insulating tube 5122 of the electrode structure 512 is made of ceramic. However, ceramic is relatively brittle and prone to cracking. Furthermore, ceramic products are more susceptible to cracking during transportation and drops from heights, rendering the electrode unusable due to arcing. Therefore, this application addresses the problem of ceramic cracking during transportation and drops by providing a U-shaped electrical limit groove 5151 on the elastic buffer member 515. The elastic buffer member 515 is manufactured using a high-elasticity silicone material through precision injection molding. Its surface has a U-shaped groove structure to accommodate the dimensional tolerances of the electrode structure 512, serving to mount the electrode structure 512 and providing a limiting effect. The elastic buffer member 515 is fixed to the mounting bracket 511, serving as a support and buffer structure for the electrode structure. The pressure plate 516 is equipped with a buckle 5161, which cooperates with the slot 51111 on the mounting bracket 511. The electrode structure 512 is pressed and fixed on the mounting bracket 511 through the buckle 5161 connection method, ensuring that it will not loosen due to vibration during operation. At the same time, the elastic buffer 515 can effectively absorb external impacts. It not only serves as a supporting skeleton for the electrode structure 512, but also effectively absorbs external mechanical impacts due to its excellent elastic buffer characteristics, attenuating the impact energy and greatly reducing the risk of micro-displacement of the electrode caused by thermal expansion and contraction or external disturbances. It has both fixing and shock absorption functions, improving the stability, reliability and service life of the module.

[0083] Based on the above embodiments, as a further defined embodiment, multiple sets of electrode structures 512 are arranged in a single row with equal spacing; the diameter of the outer electrode 5123 is set as d1, and the spacing between two adjacent sets of electrode structures 512 is set as d2, wherein 1.5d1≤d2≤5d1; the number of electrode structures 512 is 8 to 14 sets.

[0084] By arranging the electrode structure 512 in a single row, the problem of airflow obstruction caused by multiple rows can be avoided. Furthermore, the design of equidistant arrays of multiple electrode structures 512 ensures uniform discharge throughout the entire electrode safety zone. In addition, by setting the spacing of the electrode structures 512 within the aforementioned range, the problem of arcing caused by two electrode structures 512 being too close can be effectively avoided. Simultaneously, it also prevents two electrode structures 512 from being too far apart, resulting in a small effective discharge area and some airflow passing directly through without passing the plasma region, leading to low purification efficiency.

[0085] Preferably, the number of electrode structures 512 is 12 groups.

[0086] In some embodiments, such as Figures 2 to 4 , Figure 6 and Figure 6 , Figure 12 and Figure 13As shown, the plasma generator 51 also includes a high-voltage connection plate 514. One end of the inner electrode 5121 near the conductive sleeve 5124 extends out of the insulating tube 5122 and forms a conductive path with the power supply through the high-voltage connection plate 514. In the above embodiments, by using a high-voltage connection plate 514 to replace the messy traditional welded wires, the electrical connections of all electrodes are integrated onto a single plate, resulting in neat and standardized wiring, greatly simplifying the internal structure, and achieving standardized and modular electrical connections. Furthermore, the high-voltage connection plate 514 provides a clear and reliable interface with stable resistance, avoiding problems such as incomplete or missing welds that may occur with manual welding, ensuring the consistency and long-term reliability of the conductivity of all electrodes. Moreover, the high-voltage connection plate 514 can be connected to the electrode structure 512 via plug-in or crimping, significantly improving assembly efficiency and reducing production costs and reliance on worker skills. In addition, by concentrating the electrical connections of the outer electrode 5123 and the inner electrode 5121 on one side, all connection points can be fixed by epoxy resin potting on only one side. Single-sided potting is more convenient than existing double-sided potting, and it also effectively ensures that the insulating tube 5122 will not break due to stress compression from double-sided potting, thus improving process efficiency and ensuring the conductivity of the electrode structure 512.

[0087] In some embodiments, the high-voltage connection board 514 is a PCB board.

[0088] In the above embodiments, the high-voltage connection plate 514, by adopting a PCB board, ensures that the electrical parameters obtained by each electrode are highly consistent, thereby ensuring the uniformity and stability of the discharge of the entire plasma generator 51. Moreover, after using the PCB board, the electrical connection of all electrodes is transformed into a simple plug-in or crimping process, eliminating the wire stripping and soldering process in production and greatly improving production efficiency. This provides a solid foundation for large-scale mass production. Furthermore, the increase or decrease in the number of electrodes can be achieved simply by adjusting the interface layout on the PCB board. The modularity and design scalability are extremely high, providing a scalable standardized basis for mass production.

[0089] In some embodiments, the PCB board can be a flexible PCB board or a rigid PCB board. A flexible PCB board can adapt to different shaped installation spaces, improving the applicability of the module. Furthermore, a flexible PCB board has good bending performance, enabling reliable connections in confined spaces, making it particularly suitable for the design of compact plasma generators 51. A rigid PCB board, on the other hand, has good strength and can provide support and stability for the electrode structure 512. The choice between a flexible and a rigid PCB board can be adapted according to actual needs.

[0090] Based on the above embodiments, as a further defined embodiment, the low-voltage connection plate 513 is connected to the grounding terminal of the power supply, and the high-voltage connection plate 514 is connected to the high-voltage terminal of the power supply. Preferably, the ends of the low-voltage connection plate 513 and the high-voltage connection plate 514 connected to the power supply are located on the same side and are respectively connected to the power supply through wires 517. For convenient wiring, specifically, the end of the low-voltage connection plate 513 near the power supply is connected to the grounding terminal of the power supply, and the end of the low-voltage connection plate 513 near the power supply is connected to the high-voltage terminal of the power supply through wires 517.

[0091] Based on the above implementation, one end of the mounting bracket 511 is provided with two cable trays 51112, which are respectively used for the wires 517 connecting the low-voltage connection plate 513 to the power supply and the wires 517 connecting the high-voltage connection plate 514 to the power supply.

[0092] In the above embodiment, the power connection terminals of the low-voltage connection plate 513 and the high-voltage connection plate 514 are located on the same side. Combined with the design of two independent cable trays 51112, this allows high and low voltage conductors to pass through in an orderly manner, resulting in neat wiring, high space utilization, and avoiding wire tangling, effectively saving installation space. Furthermore, the separate routing of wires through the two independent cable trays 51112 achieves physical isolation between the high and low voltage conductors, effectively preventing interference and short-circuit risks between high and low voltage lines, and improving the electrical safety performance of the system. In addition, it facilitates installation and maintenance, as the power connection terminals are centrally located on the same side, making wiring operations and subsequent maintenance easier. The design of the cable trays 51112 makes the fixing of the wires 517 more standardized, less prone to confusion during disassembly, and reduces maintenance difficulty and error rate.

[0093] As a further defined embodiment, both the low-voltage connecting plate 513 and the high-voltage connecting plate 514 are located above the electrode structure 512, and the low-voltage connecting plate 513 and the high-voltage connecting plate 514 are respectively fixed on the mounting bracket 511 by means of snap-fit, plug-in or other methods.

[0094] In some alternative embodiments, the bottom edge of the upper frame of the mounting bracket 511 bends and extends towards the electrode structure 512 to form a first step position for accommodating and supporting the low-voltage connecting plate 513, which is then embedded and limited within this first step position. A second step position is formed at the top of the upper frame of the mounting bracket 511, within which the high-voltage connecting plate 514 is embedded and limited. The second step position is higher than the first step position, and the high-voltage connecting plate 514 is higher than the low-voltage connecting plate 513.

[0095] Furthermore, after the electrode structure 512, elastic buffer 515, pressure plate 516, low-voltage connecting plate 513, and high-voltage connecting plate 514 are all assembled, the upper cover 5112 and lower cover 5113 are fastened, and then insulating glue is poured into the upper cover 5112 to form an insulating seal, so that the low-voltage connecting plate 513 and high-voltage connecting plate 514 are insulated from the outside air, preventing leakage, sparking, or other related safety hazards. Optionally, the insulating glue is epoxy resin. When it is necessary to disassemble and maintain the electrode structure 512, the lower cover 5113 is opened for disassembly and maintenance.

[0096] In some embodiments, the inner electrode 5121 is inserted into the high-voltage connection plate 514 for easy assembly and disassembly. Specifically, the inner electrode 5121 has an extension section that extends out of the insulating tube; the high-voltage connection plate 514 is provided with a connection hole 5141, and the extension section is inserted into the connection hole 5141.

[0097] In the above embodiment, the protruding section of the inner electrode 5121 is inserted into the connection hole 5141 of the high voltage connection plate 514, thereby ensuring the precise alignment of each inner electrode 5121 and forming a stable electrical connection through the tight fit between the connection hole 5141 and the inner electrode 5121. At the same time, it realizes the rapid and parallel assembly of the high voltage end and completes the efficient assembly closed loop of the entire device with "high and low voltage double-side plate connection".

[0098] Preferably, the protruding section and the connecting hole 5141 are interference-fitted, so that the inner electrode 5121 and the high-voltage connecting plate 514 are tightly connected, resulting in higher electrical conductivity stability. Of course, in other optional embodiments, conductive adhesive can be poured between the inner electrode 5121 and the connecting hole 5141 to further improve the stability of their connection.

[0099] To address the difficulty of connecting the thin external electrode 5123 to the power supply, this embodiment adds a conductive sleeve 5124 to the end of the external electrode 5123. Simultaneously, a low-voltage connecting plate 513 replaces the metal connecting wire. The high-voltage connecting plate 514 has a number of connecting holes 5141 equal to the number of electrodes, while the low-voltage connecting plate 513 has the same number of U-shaped bayonets 5131. During production and installation, the inner electrode 5121 is connected to the connecting holes 5141 of the high-voltage connecting plate 514, and the U-shaped bayonets 5131 of the low-voltage connecting plate 513 are connected to the conductive sleeve 5124. The plate is then mounted on the mounting bracket 511, and the electrode structure 512 is fixed by the pressure plate 516. This connection method significantly reduces installation time, effectively improves production efficiency, and solves the problem of connecting the metal connecting wire to the external electrode 5123 of the electrode structure 512. By using the high-voltage connecting plate 514 and the low-voltage connecting plate 513 to replace the metal connecting wire for electrode connection, the wire stripping and soldering process is eliminated in production, greatly improving efficiency.

[0100] Secondly, the present invention also provides an air purifier, including a housing and a plasma generator 51. The housing has an air inlet and an air outlet; the plasma generator 51 is installed on the airflow path between the air inlet and the air outlet. Preferably, the plasma generator 51 is installed at the air outlet. By installing the plasma generator 51 on the air purifier and applying an alternating current to it to generate a glow discharge field, the purpose of deodorization is achieved, thereby improving the air purification effect.

[0101] In existing plasma generators 51, the outer electrode 5123 (carbon fiber filament) of the electrode structure 512 extends outwards. Within a single plasma generator 51, the carbon fiber tails of multiple electrode structures 512 need to be twisted together. After combing the carbon fiber tails, the carbon fiber tails of each ceramic electrode are connected by solder to form a conductive module. However, this method has certain conductivity issues. The messy, intertwined carbon fiber tails are inconvenient and unsightly for wiring. Therefore, to solve the problems of messy carbon fiber tail connections and conductivity, this application removes the extended portion of the carbon fiber tail. In addition to retaining only the spiral portion of the outer electrode 5123 on the insulating tube 5122, the end of the outer electrode 5123 is wrapped and fixed with copper foil at a position set at a distance d from the protruding end of the inner electrode 5121. The protruding end of the inner electrode 5121 and the end of the outer electrode 5123 with the conductive sleeve 5124 are located on the same side. This design reduces connection difficulty while maintaining functionality. Furthermore, when potting epoxy resin, only one side of the connecting wire needs to be potted, significantly reducing manufacturing costs compared to the original method of potting both sides. The insulating tube 5122 is also less prone to breakage due to pressure stress at both ends. In the overall structure, the electrode structure 512 is supported by the U-shaped electrical limit groove 5151 of the elastic buffer 515 and fixed by the buckle 5161 of the pressure plate 516. The outer electrode 5123 is connected to the inner electrode 5121 at a designated position via copper foil, and a conductive path is achieved through the PCB board. This design not only improves the stability of the external electrode 5123's power supply but also enhances its shock resistance, making it suitable for various air purification devices requiring deodorization functions.

[0102] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the protection scope of the embodiments of this application.

Claims

1. A plasma generating device, characterized in that, include: The electrode structure (512) includes an insulating tube (5122), an inner electrode (5121) passing through the insulating tube (5122), an outer electrode (5123) spirally wound around the outside of the insulating tube (5122), and a conductive sleeve (5124) fixed and covering at least one end of the outer electrode (5123). The low-voltage connection board (513) is fixedly connected to the conductive sleeve (5124) to form an electrical connection. The external electrode (5123) forms a conductive path with the power supply through the conductive sleeve (5124) and the low-voltage connection board (513). The low-voltage connection board (513) is a PCB board.

2. The plasma generating device according to claim 1, characterized in that, The conductive sleeve (5124) is made of copper foil or conductive adhesive.

3. The plasma generating device according to claim 1, characterized in that, Both ends of the conductive sleeve (5124) are covered with insulating glue (5125) and fixed to the outside of the insulating tube (5122).

4. The plasma generating apparatus according to any one of claims 1 to 3, characterized in that, The conductive sleeve (5124) covers one end of the outer electrode (5123); The electrode structure (512) has multiple sets arranged in a linear interval, and the conductive sleeve (5124) is provided in multiple ways, and the multiple conductive sleeves (5124) are provided at the same end of the multiple sets of electrode structures (512). The low-voltage connecting plate (513) is disposed on the side of the multiple sets of electrode structures (512) where the conductive sleeves (5124) are provided, and the low-voltage connecting plate (513) is fixedly connected to and electrically conductive with all the conductive sleeves (5124).

5. The plasma generating device according to claim 4, characterized in that, Multiple sets of the electrode structures (512) are arranged in a single row with equal spacing; The diameter of the external electrode (5123) is set as d1, and the distance between two adjacent sets of electrode structures (512) is set as d2, wherein 1.5d1≤d2≤5d1; And / or, the number of electrode structures (512) is 8 to 14 sets.

6. The plasma generating apparatus according to any one of claims 1 to 3, characterized in that, The low-voltage connecting plate (513) is provided with a bayonet (5131), which is press-fitted into the outer periphery of the conductive sleeve (5124).

7. The plasma generating apparatus according to any one of claims 1 to 3, characterized in that, The plasma generating device (51) further includes: The high voltage connection plate (514) has an inner electrode (5121) extending from the insulating tube (5122) near the conductive sleeve (5124) and forming a conductive path with the power supply through the high voltage connection plate (514). The high voltage connection plate (514) is a PCB board.

8. The plasma generating apparatus according to claim 7, characterized in that, The inner electrode (5121) has an extension that extends out of the insulating tube (5122); The high-voltage connecting plate (514) is provided with a connecting hole (5141), and the protruding section is inserted into the connecting hole (5141).

9. The plasma generating apparatus according to any one of claims 1 to 3, characterized in that, The winding pitch of the outer electrode (5123) is set to D, the end of the inner electrode (5121) that extends out of the insulating tube (5122) is the protruding end, and the end of the outer electrode (5123) with the conductive sleeve (5124) is the electrical connection end. The protruding end and the electrical connection end are located on the same side of the electrode structure (512), and the distance between them is d, where d > 2D.

10. The plasma generating apparatus according to any one of claims 1 to 3, characterized in that, The PCB board can be a flexible PCB board or a rigid PCB board.

11. An air purifier, characterized in that, include: The housing is provided with an air inlet and an air outlet; The plasma generating device (51) according to any one of claims 1 to 10 is installed on the airflow path between the air inlet and the air outlet.

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