Plasma generating device and electrical equipment

Abstract

The utility model discloses a plasma generating device and electrical equipment, and relates to the plasma technology field, the plasma generating device comprises a dielectric layer, a first electrode and a second electrode, the dielectric layer is provided with a first plane and a second plane which are arranged back to back; at least part of the first electrode is arranged to be a first extension section, and the first extension section is arranged on the first plane or spaced from the first plane; at least part of the second electrode is arranged to be a second extending section, the second extending section is provided with a plane attached to the second plane or arranged opposite to the second plane, and the first extending section and the second extending section are arranged in a separated mode through the dielectric layer. According to the technical scheme, the generation position of the plasma in the plasma generation device can be controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma, and particularly relates to a plasma generating device and an electrical equipment. Background Art

[0002] Plasma sterilization and purification utilizes the energy and active components generated by the discharge between two electrodes, which can kill VOC (volatile organic compounds) and viruses and bacteria in the air, and generate water and carbon dioxide, having advantages different from other air purification technologies. Content of the Utility Model

[0003] The main object of the utility model is to propose a plasma generating device, aiming to make the generation position of plasma in the plasma generating device controllable.

[0004] To achieve the above object, the plasma generating device proposed by the utility model includes a dielectric layer, a first electrode and a second electrode, and the dielectric layer has a first plane and a second plane arranged back to back;

[0005] At least part of the first electrode is arranged as a first extension section, the first extension section is arranged on the first plane or is arranged at an interval from the first plane, and the first extension section and the second extension section are separated by the dielectric layer;

[0006] At least part of the second electrode is arranged as a second extension section, and the second extension section has a plane that fits with the second plane or is arranged opposite to the second plane.

[0007] The utility model also proposes a plasma generating device, including a dielectric layer, a first electrode and a second electrode, and the dielectric layer has a first plane and a second plane arranged back to back;

[0008] At least part of the first electrode is arranged as a first extension section, the first extension section is arranged on the first plane or is arranged at an interval from the first plane, at least part of the second electrode is arranged as a second extension section, the second extension section is arranged on the second plane or is arranged at an interval from the second plane, the first extension section and the second extension section are separated by the dielectric layer, and the shapes of the first extension section and the second extension section are different;

[0009] Wherein, when a voltage is applied to the first electrode and the second electrode, the field strength of the discharge electric field of the first extension section is higher than that of the discharge electric field of the second extension section.

[0010] In an embodiment, the orthographic projections of the first extension section and the second extension section on the dielectric layer partially overlap;

[0011] Or, the positive projection edges of the first extension section and the second extension section meet at the dielectric layer;

[0012] Or, the positive projections of the first extension section and the second extension section are arranged in a staggered manner on the dielectric layer.

[0013] In one embodiment, the end of the first extension section is located within the area where the first plane is located, and the end of the second extension section is blunt compared to the end of the first extension section.

[0014] In one embodiment, the first extension section is a wire.

[0015] In one embodiment, the cross-sectional dimension of the end of the first extension section is tapered, and at least one side surface of the first extension section is provided with an inclined surface that is inclined relative to the extension direction of the first extension section.

[0016] In one embodiment, the end of the first extension section forms a tip.

[0017] In one embodiment, at least in the end region of the first extension section, the width of the first extension section is tapered along the extension direction of the first extension section;

[0018] And / or, at least in the end region of the first extension section, the thickness of the end of the first extension section is tapered along the extension direction of the first extension section.

[0019] In one embodiment, the first extension section is a conductive sheet;

[0020] Or, the first extension section is a conductive film;

[0021] Or, the first extension section is a conductive coating provided on the surface of the dielectric layer;

[0022] Or, the plasma generating device further includes a first carrier member disposed opposite to the dielectric layer, and the first extension section is a conductive coating provided on the surface of the first carrier member;

[0023] Or, the first extension section is a conductive needle.

[0024] In one embodiment, the first extension section is a wire, the end of the first extension section extends outward from the first plane, and the central axes of the first extension section and the second extension section are arranged at an angle.

[0025] In one embodiment, the projection profile of the end face of the second extension section on the second plane is arc-shaped;

[0026] And / or, the cross-sectional profile of the end face of the second extension section in the thickness direction is arc-shaped.

[0027] In one embodiment, the end face of the second extension section is an arc surface;

[0028] Or, the second extension section is a flat structure with an arc-shaped end profile.

[0029] In one embodiment, the second extension section is a conductive sheet;

[0030] Or, the second extension section is a conductive film;

[0031] Or, the second extension section is a conductive coating provided on the surface of the dielectric layer;

[0032] Or, the plasma generating device further includes a second carrier disposed opposite to the dielectric layer, and the second extension section is a conductive coating provided on the surface of the second carrier.

[0033] In one embodiment, the dielectric layer is an insulating plate;

[0034] And / or, the dielectric layer is an insulating coating provided on the surface of the second extension section.

[0035] In one embodiment, the dielectric layer covers the outer surface of the second extension section.

[0036] In one embodiment, the first electrode has at least two of the first extension sections;

[0037] And / or, the plasma generating device is provided with at least two of the first electrodes, and at least two of the first electrodes are both provided with the first extension sections disposed opposite to the dielectric layer.

[0038] In one embodiment, the plasma generating device further includes a housing, an accommodation space is formed in the housing, and at least one outlet communicating with the accommodation space is provided;

[0039] The dielectric layer, at least part of the first electrode, and at least part of the second electrode are disposed in the accommodation space, and the first extension section extends towards one of the outlets.

[0040] In one embodiment, one of the outlets is disposed opposite to the first plane, and the first extension section is exposed at the outlet.

[0041] In one embodiment, the housing is further provided with a flow guiding structure, the flow guiding structure extends from the edge of the outlet towards the outside of the housing, and the end of the first extension section faces the flow guiding structure.

[0042] In one embodiment, at least two outlets are formed in the housing, and two of the outlets are respectively located on both sides of the dielectric layer and are oppositely arranged with respect to the first extension section and the second extension section.

[0043] In one embodiment, a first mounting groove is provided on the inner surface of the housing, and at least a part of the first extension section is arranged in the first mounting groove;

[0044] And / or, a first limiting groove is provided on the inner surface of the housing, the first electrode is provided with a first limiting portion, the first limiting portion is connected to the side of the first extension section, and the first limiting portion is arranged in the first limiting groove.

[0045] In one embodiment, a second mounting groove is provided on the inner surface of the housing, and at least a part of the second electrode is arranged in the second mounting groove;

[0046] And / or, a second limiting groove is provided on the inner surface of the housing, the second electrode is provided with a second limiting portion, the second limiting portion is connected to the side of the second extension section, and the second limiting portion is arranged in the second limiting groove.

[0047] In one embodiment, a part of the first electrode extends to the outside of the housing to form a first power connection section;

[0048] And / or, a part of the second electrode extends to the outside of the housing to form a second power connection section.

[0049] The present application also provides an electrical device, and the electrical device is provided with the plasma generating device as described in any one of the foregoing embodiments.

[0050] According to the technical solution of the present application, by providing a first extension section on the first electrode of the plasma generating device, the first extension section and the second electrode are separated by an insulating dielectric layer. During application, alternating current can be applied to the first electrode and the second electrode. Due to the blocking of the dielectric layer, direct breakdown discharge cannot occur, so that surface dielectric barrier discharge can be formed on the surface of the dielectric layer to ionize air to generate plasma. And through the arrangement of the first extension section, on one side of the first electrode, plasma can be concentratedly generated in the edge area of the first extension section, so that the position where plasma is generated on at least one side of the first electrode in the plasma generating device is controllable, which is convenient for the utilization of the plasma generated on one side of the first electrode, and a better sterilization and purification effect can be achieved. Description of the Drawings

[0051] To more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0052] Figure 1 Structural diagram of the first embodiment of the plasma generating device provided by this application;

[0053] Figure 2 For Figure 1 Exploded view of the plasma generating device in

[0054] Figure 3 Schematic diagram of the second embodiment of the plasma generating device provided by this application;

[0055] Figure 4 Side cross-sectional view of the third embodiment of the plasma generating device provided by this application;

[0056] Figure 5 Side cross-sectional view of the fourth embodiment of the plasma generating device provided by this application;

[0057] Figure 6 Side cross-sectional view of the fifth embodiment of the plasma generating device provided by this application;

[0058] Figure 7 Side cross-sectional view of the sixth embodiment of the plasma generating device provided by this application;

[0059] Figure 8 Schematic diagram of the seventh embodiment of the plasma generating device provided by this application;

[0060] Figure 9 Exploded view of the eighth embodiment of the plasma generating device provided by this application;

[0061] Figure 10 Schematic diagram of the ninth embodiment of the plasma generating device provided by this application;

[0062] Figure 11 Schematic diagram of the tenth embodiment of the plasma generating device provided by this application;

[0063] Figure 12 Schematic diagram of the eleventh embodiment of the plasma generating device provided by this application;

[0064] Figure 13 For Figure 12 Side cross-sectional view of the plasma generating device in

[0065] Figure 14 This is a structural diagram of a first half-shell of a housing in the plasma generating device provided for this application.

[0066] Explanation of the reference numerals in the drawings:

[0067] 100, plasma generating device; 1, dielectric layer; 11, first plane; 12, second plane; 2, first electrode; 21, first extension section; 22, first power connection section; 23, first limiting part; 3, second electrode; 31, second extension section; 32, second power connection section; 33, second limiting part; 4, housing; 41, accommodation space; 42, outlet; 43, first half-shell; 44, second half-shell; 45, first installation groove; 46, second installation groove; 47, first limiting groove; 48, second limiting groove; 49, flow guiding structure.

[0068] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0069] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0070] Plasma sterilization and purification utilizes the energy and active components generated by the discharge between two electrodes, which can kill VOC (volatile organic compounds) and virus bacteria in the air, generating water and carbon dioxide, and has advantages different from other air purification technologies. In related technologies, most plasma generating devices use a method in which two plate-shaped electrodes are arranged opposite each other on both sides of a dielectric (insulator) to discharge between the two plate-shaped electrodes. In such a structure, plasma is randomly generated near the two electrodes, and the generation position of the plasma cannot be controlled at a finer scale. And the generation of plasma requires the local electric field strength to reach the breakdown electric field strength of the gas, and most plasma generating devices generate more plasma by increasing the voltage, which leads to the need for a larger excitation voltage.

[0071] To solve the above problems, this application proposes a plasma generating device 100, which is used to oxidize organic pollutants such as VOC and kill bacteria and viruses by using plasma to purify gases such as air, and can also be used to purify some non-conductive liquids.

[0072] Please refer toFigures 1 to 4 In one embodiment of the present application, the plasma generating device 100 includes a dielectric layer 1, a first electrode 2, and a second electrode 3. The dielectric layer 1 has a first plane 11 and a second plane 12 disposed opposite to each other; at least a part of the first electrode 2 is arranged as a first extension section 21, and the first extension section 21 is disposed on the first plane 11 or spaced apart from the first plane 11. At least a part of the second electrode 3 is arranged as a second extension section 31, and the second extension section 31 has a plane that fits or is opposite to the second plane 12. The first extension section 21 and the second extension section 31 are separated by the dielectric layer 1.

[0073] Among them, the plasma generating device 100 includes a first electrode 2, a second electrode 3, and a dielectric layer 1 for separating the first electrode 2 and the second electrode 3. At least a part of the first electrode 2 forms a first extension section 21 with a certain length. The first extension section 21 can be a linear structure or a strip structure with a certain width; at least a part of the second electrode 3 forms a second extension section 31 with a certain length, and the second extension section 31 has a strip structure with a certain width. The second extension section 31 has two opposite planes. At least a part of the dielectric layer is set as a planar dielectric structure and has a first plane 11 and a second plane 12 disposed opposite to each other. The first extension section 21 can be disposed on the first plane 11 or spaced apart from the first plane 11. One side plane of the second extension section 31 fits or is opposite to the second plane 12. The dielectric layer 1 can be made of insulating materials such as quartz and ceramics; it can be a plate-like structure disposed between the first electrode 2 and the second electrode 3, or an insulating coating coated on the surface of the second extension section 31. In addition, the dielectric layer 1 can also be set as an insulating sleeve covering the second extension section 31.

[0074] Please refer to Figure 4 and Figure 5 In this embodiment, the second extension section 31 can be disposed on the surface of the dielectric layer 1. For example, the second electrode 3 is attached to the dielectric layer 1, or the second electrode 3 can be set as a conductive coating on the surface of the dielectric layer 1. This can not only reduce the overall thickness of the second electrode 3 and the dielectric layer 1, thereby facilitating the reduction of the thickness of the plasma generating device 100; but also reduce the straight-line distance between the first electrode 2 and the second electrode 3, thereby reducing the excitation voltage of the plasma generating device 100 and improving the use safety.

[0075] In some embodiments, the second electrode 3 can also be spaced apart from the dielectric layer 1. By setting it in this way, the distance between the second electrode 3 and the first electrode 2 is relatively increased, which can improve the insulation performance between the first electrode 2 and the second electrode 3, reduce the risk of problems such as voltage breakdown, and improve the use safety.

[0076] By separating the first electrode 2 and the second electrode 3 through the dielectric layer 1, a dielectric barrier discharge can be formed between the first electrode 2 and the second electrode 3. When the power supply supplies power to any one of the first electrode 2 and the second electrode 3, an alternating current can be introduced into the first electrode 2 and the second electrode 3, resulting in a voltage difference between the first electrode 2 and the second electrode 3, causing a dielectric barrier discharge to form on the surface of the dielectric layer 1 and acting on the fluid flowing through the first electrode 2 and the second electrode 3 (for example, air, the exhaust gas of certain processes, or liquid), making the fluid and the substances in the fluid charged and become in a plasma state to generate plasma, so as to kill VOC and virus bacteria in the fluid, generate water and carbon dioxide, thereby achieving a purification effect.

[0077] Compared with the method of arranging plate-shaped electrodes on both sides of the dielectric layer 1, in the present application, the plasma on one side of the first electrode 2 is concentrated in the edge region or end region of the first extension section 21, so that the generation region and diffusion region of the plasma on one side of the first electrode 2 can be controlled, which is beneficial to the utilization of the plasma.

[0078] In some embodiments, the shape of the second extension section 31 is different from that of the first extension section 21. With this setting method, the shapes of the first extension section 21 and the second extension section 31 can be set according to actual needs, so that when a voltage is applied to the first electrode 2 and the second electrode 3, the field strength of the discharge electric field on the side of the first extension section 21 is higher than that on the side of the second extension section 31, so that more plasma is generated on the side with a higher field strength; for example, in the following embodiment, the end of the second extension section 31 of the second electrode 3 opposite to the dielectric layer 1 is blunter than the end of the first extension section 21; or the first extension section 21 is set as a wire, and the extending direction of the first extension section 21 is perpendicular or substantially perpendicular to the extending direction of the second extension section 31. At this time, the first extension section 21 forms a linear discharge region; in both cases, when a voltage is applied to the first electrode 2 and the second electrode 3, the field strength of the discharge electric field on the side of the first extension section 21 is higher than that on the side of the second extension section 31, so that the plasma is concentrated on the side of the first extension section 21, increasing the plasma generation amount on the side of the first extension section 21. This setting method is beneficial to reducing the excitation voltage of the plasma generating device 100.

[0079] The first extension section 21 can be arranged on the first plane 11 of the dielectric layer 1. For example, the first extension section 21 is attached to the first plane 11, which can reduce the overall thickness of the first extension section 21 and the dielectric layer 1, thereby being beneficial to reducing the thickness of the plasma generating device 100; it can also reduce the straight-line distance between the first extension section 21 and the second electrode 3, thereby reducing the excitation voltage of the plasma generating device 100 and improving the use safety.

[0080] In some embodiments, the first extension segment 21 is spaced from the first plane 11 of the dielectric layer 1, and there is an air gap between the first extension segment 21 and the dielectric layer 1. At this time, the contact area between the first extension segment 21 and the air increases, which can increase the ionization efficiency, improve the generation efficiency and generation amount of plasma, and is beneficial to improving the sterilization and purification effects. In addition, the insulation performance between the first electrode 2 and the second electrode 3 can be improved, the risk of problems such as voltage breakdown can be reduced, and the use safety can be improved.

[0081] In the technical solution of the present application, by providing the first extension segment 21 on the first electrode 2 of the plasma generating device 100, the first extension segment 21 and the second extension segment 31 are separated by the insulating dielectric layer 1; when in application, alternating current can be introduced into the first electrode 2 and the second electrode 3. Due to the blocking of the dielectric layer 1, direct breakdown discharge cannot occur, so dielectric barrier discharge can be formed on the surface of the dielectric layer 1 to ionize the air to generate plasma; and through the setting of the first extension segment 21, on one side of the first electrode 2, plasma can be concentratedly generated in the edge area of the first extension segment 21, so that the plasma generation position in the plasma generating device 100 is controlled at the position of the first extension segment 21, which is convenient for the utilization of the plasma generated on one side of the first electrode 2 and realizes a better sterilization and purification effect.

[0082] Please refer to Figure 6 , in an embodiment, the orthographic projections of the first extension segment 21 and the second extension segment 31 on the dielectric layer 1 are misaligned. That is, the first extension segment 21 and the second extension segment 31 do not overlap, which can increase the creepage distance along the surface of the dielectric layer 1 between the first extension segment 21 and the second extension segment 31 and ensure that the first extension segment 21 and the second extension segment 31 are insulated from each other.

[0083] Please refer to Figure 3 and Figure 4 , in an embodiment, the orthographic projections of the first extension segment 21 and the second extension segment 31 on the dielectric layer 1 partially overlap.

[0084] Compared with the method of misaligning the projections of the first extension segment 21 and the second extension segment 31, making the orthographic projections of the first extension segment 21 and the second extension segment 31 on the dielectric layer 1 partially overlap can minimize the shortest distance D between the first extension segment 21 and the second extension segment 31, thereby reducing the excitation voltage, improving the use safety, and reducing the overall thickness of the plasma generating device 100 and the volume, which is beneficial to the application of the plasma generating device 100 in a small space.

[0085] Please refer to Figure 5, in one embodiment, the first extension segment 21 and the second extension segment 31 are joined at the edge of the orthographic projection of the dielectric layer 1. In this setting, the shortest distance D between the first extension segment 21 and the second extension segment 31 can also be minimized, so as to reduce the excitation voltage of the plasma generating device 100, reduce the overall thickness of the plasma generating device 100, reduce the volume and improve the use safety.

[0086] Please refer to Figure 3 、 Figures 8 to 10 , in one embodiment, the end of the first extension segment 31 is located within the region where the first plane 11 is located, and the end of the second extension segment 31 is blunt compared to the end of the first extension segment 21.

[0087] In this embodiment, the end of the first extension segment 21 is located within the region where the first plane 11 is located, and the end of the second extension segment 31 is made blunt compared to the end of the first extension segment 21. For example, the end of the first extension segment 21 can be set as a tip, and the end of the second extension segment 31 can be set as a plane, a straight edge or a curved surface. It is also possible to make the radius of curvature of the end of the second extension segment 31 greater than the radius of curvature of the end of the first extension segment 21. With such a setting, when a voltage is applied to the first electrode 2 and the second electrode 3, the local electric field strength of the first extension segment 21 can be made greater than the local electric field strength of the second extension segment 31, so that the plasma can be concentrated on the side of the first extension segment 21.

[0088] Please refer to Figure 10 , in some embodiments, the first extension segment 21 is a wire. The wire can be a metal wire. With this setting, the end of the first extension segment 21 is approximately a tip, and the electric field strength of the discharge electric field of the first extension segment 21 can also be made higher than the electric field strength of the discharge electric field of the second extension segment 31, so that the plasma can be concentrated in the end region of the first extension segment 21.

[0089] Please refer to Figure 3 、 Figure 8 and Figure 9 , in one embodiment, the cross-sectional dimension of the end of the first extension segment 21 is tapered, and at least one side surface of the first extension segment 21 is set as an inclined surface that is inclined relative to the extension direction of the first extension segment 21.

[0090] In this embodiment, one side surface of the first extension section 21 is an inclined surface that is inclined relative to the extension direction of the first extension section 21, and the cross-sectional dimension of the end of the first extension section 21 gradually shrinks; at this time, the end shape of the first extension section 21 can be approximately a frustum of a cone, a frustum of a pyramid, a trapezoid or a tip. This setting method can not only reduce the radius of curvature of the end of the first extension section 21, increase the local electric field strength of the first extension section 21, and better enable the plasma in the plasma generating device 100 to be concentrated on one side of the first electrode 2. At the same time, through the design of the end shape of the first extension section 21, the plasma generated in the area of the first extension section 21 can diffuse in the direction of the end of the first extension section 21, that is, control the diffusion direction of the ion wind generated by the plasma aerodynamic effect, so as to form a directional ion wind, so that the plasma generated by the plasma generating device 100 can be controlled in the outward diffusion area from one side of the first electrode 2, so that the plasma generated by the plasma generating device 100 can be diffused to the required area according to the needs, and a better sterilization and purification effect can be achieved.

[0091] In some embodiments, the end of the first extension section 21 forms a tip. This setting method further reduces the radius of curvature of the end of the first extension section 21, which is beneficial to increasing the electric field strength difference between the first electrode 2 and the second electrode 3, making the electric field strength of the first electrode 2 higher than that of the second electrode 3, so that the plasma in the plasma generating device 100 is concentrated on one side of the first electrode 2.

[0092] Among them, please refer to Figure 3 and Figure 4 , the tip formed by the first extension section 21 can make the first extension section 21 a needle-like structure, or the end shape of the first extension section 21 can be approximately a pyramid structure. For example, the end of the first extension section 21 has two side surfaces in the width direction and two side surfaces in the thickness direction, and the four side surfaces converge at a point at the end to form a tip; in addition, as Figure 9 shows, the first extension section 21 has two opposite surfaces, and the two surfaces intersect at the end of the first extension section 21, so that the end of the first extension section 21 has a sharp edge.

[0093] Please refer to Figure 3 , in an embodiment, at least in the end region of the first extension section 21, the width of the first extension section 21 is tapered along the extension direction of the first extension section 21.

[0094] In this embodiment, the width direction of the first extension section 21 is perpendicular to the length direction of the first extension section 21 and is in the plane direction of the dielectric layer 1. The projection of the first extension section 21 on the dielectric layer 1 is generally a strip-shaped contour with a certain width, having two side edges arranged at intervals in the width direction. At least within a certain length range near the end of the first extension section 21, at least one side edge gradually extends obliquely towards the direction of approaching the other side edge, so that the width and cross-sectional dimensions of the first extension section 21 gradually shrink. This can not only reduce the curvature radius of the end of the first extension section 21, increase the local electric field strength of the first extension section 21, and better enable the plasma in the plasma generating device 100 to be concentrated on one side of the first electrode 2, but also control the diffusion of the plasma towards the end direction of the first extension section 21.

[0095] It should be noted that in the embodiment of the present application, the first extension section 21 can be a sheet electrode, a conductive film, a columnar electrode, etc. that are independent of the dielectric layer 1, and can be arranged at intervals with the dielectric layer 1 or combined by bonding or other means; the first extension section 21 can also be a conductive coating provided on the surface of the dielectric layer 1. In this embodiment, it is only necessary to make the projection of the first extension section 21 on the dielectric layer 1 be a strip structure, and at least the width gradually decreases at the end.

[0096] Please refer to Figure 4 , in an embodiment, the thickness of the end of the first extension section 21 is tapered along the extension direction of the first extension section 21.

[0097] In this embodiment, the first extension section 21 has a certain thickness, and at least within a certain length range near the end of the first extension section 21, the thickness of the first extension section 21 is tapered towards the direction of approaching the end face, so that at least one of the two surfaces in the thickness direction is inclined towards the direction of approaching the other surface. This can not only reduce the thickness of the end of the first extension section 21, which is beneficial to reducing the overall thickness of the plasma generating device 100, but also control the diffusion of the plasma towards the end direction of the first extension section 21, realizing controllable ion wind flow direction. Among them, the two surfaces of the first extension section 21 in the thickness direction can converge to form an edge at the end, or the two surfaces can be connected through the end face.

[0098] In some embodiments, the surface of the first extension section 21 away from the dielectric layer 1 is inclined towards the direction of approaching the dielectric layer 1, and the surface of the first extension section 21 close to the dielectric layer 1 is attached to or parallel to the dielectric layer 1. This can avoid increasing the distance between the first extension section 21 and the second electrode 3 while making the thickness of the first extension section 21 tapered, which is beneficial to reducing the excitation voltage of the plasma generating device 100 and improving the use safety.

[0099] In one embodiment, the first extension section 21 is a conductive sheet; alternatively, the first extension section 21 is a conductive film; alternatively, the first extension section 21 is a conductive coating provided on the surface of the dielectric layer 1; alternatively, the plasma generating device 100 further includes a first carrier disposed opposite to the dielectric layer 1, and the first extension section 21 is a conductive coating provided on the surface of the first carrier; alternatively, the first extension section 21 is a conductive needle.

[0100] In this embodiment, at least the first extension section 21 of the first electrode 2 is set as one of a conductive sheet, a conductive film, a conductive coating, a conductive needle, etc. Among them, when the first extension section 21 is a conductive sheet, its thickness can be set according to actual needs, and it can generally be made of metal materials such as silver, gold, copper, carbon materials, conductive polymers, or other materials, so that the structural strength of the first extension section 21 is relatively good and the performance stability is good; when the first extension section 21 is made in the form of a conductive film and a conductive coating, the thickness of the first extension section 21 is smaller, which is beneficial to reducing the thickness and volume of the plasma generating device 100, facilitating the application of the plasma generating device 100 in a small space, and improving the applicability and use flexibility; among them, the conductive coating can be directly provided on the surface of the dielectric layer 1 to further reduce the overall thickness of the first extension section 21 and the dielectric layer 1. In addition, a first carrier can also be provided for setting the conductive coating to form the first extension section 21. Among them, the conductive sheet, the conductive film, the conductive coating, etc. can all set the first extension section 21 into the required shape and structure according to actual needs. For example, in the above embodiment, the end of the first extension section 21 is set as a tapered structure, such as a tip, so as to increase the electric field strength on one side of the first extension section 21 and further control the plasma generation region and diffusion direction. When a conductive needle is used as the first extension section 21, the end of the first extension section 21 is a tip, which is also beneficial to making the electric field strength of the discharge electric field of the first extension section 21 higher than that of the second extension section 31, and improving the plasma generation efficiency and generation amount on one side of the first extension section 21.

[0101] It should be noted that, in some embodiments, the first electrode 2 further includes a first power connection section 22 connected to the first extension section 21. The first power connection section 22 can be made of the same material and structure as the first extension section 21, which is convenient for manufacturing the first electrode 2. For example, both the first power connection section 22 and the first extension section 21 are conductive sheets or conductive films or wires, etc.; the first power connection section 22 can also be different from the first extension section 21. For example, the first extension section 21 can be set as a conductive sheet, and the first power connection section 22 can be set as a wire.

[0102] Please refer to Figure 3 , in one embodiment, the projection profile of the end face of the second extension section 31 on the surface of the dielectric layer 1 is arc-shaped.

[0103] The width direction of the second extension section 31 is perpendicular to the extension direction of the second extension section 31 and parallel to the surface of the dielectric layer 1. In this embodiment, the projection of the second extension section 31 on the dielectric layer 1 is generally a strip-shaped contour with a certain width, and the orthographic projection contour of the end of the second extension section 31 on the surface of the dielectric layer 1 is arc-shaped. Among them, the second extension section 31 can be a sheet-shaped electrode, a conductive film independent of the dielectric layer 1, or a conductive coating provided on the surface of the dielectric layer 1. At this time, the contour of the second extension section 31 also generally forms a strip-shaped structure with an arc-shaped end; the second extension section 31 can also be a columnar electrode, etc. At this time, the end face of the second extension section 31 can be a spherical surface, an arc-shaped cylindrical surface bent along the width direction of the second extension section 31, or an annular surface bent in both the width direction and the thickness direction of the second extension section 31. By setting like this, the end of the second extension section 31 can be made relatively blunt, increasing the curvature radius of the end of the second extension section 31, which is beneficial to increasing the field strength difference between the first electrode 2 and the second electrode 3, making the field strength of the first electrode 2 higher than that of the second electrode 3, so that the plasma in the plasma generating device 100 is concentrated on one side of the first electrode 2, achieving the purpose of controlling the main plasma generation region.

[0104] Please refer to Figure 4 , in an embodiment, the cross-sectional contour of the end face of the second extension section 31 in the thickness direction is arc-shaped.

[0105] In this embodiment, the second extension section 31 can be a sheet-shaped electrode with a certain thickness, or a columnar structure, etc., so that the second extension section 31 has a relatively obvious and curved end face. The end face of the second extension section 31 can be a spherical surface, an arc-shaped cylindrical surface bent along the thickness direction of the second extension section 31, or an annular surface bent in both the width direction and the thickness direction of the second extension section 31. By setting like this, the end of the second extension section 31 can also be made relatively blunt, thereby increasing the curvature radius of the end of the second extension section 31, which is beneficial to increasing the field strength difference between the first electrode 2 and the second electrode 3, so that the plasma in the plasma generating device 100 is concentrated on one side of the first electrode 2, achieving the purpose of controlling the main plasma generation region.

[0106] Please refer to Figure 3 and Figure 4 , in an embodiment, the end face of the second extension section 31 is an arc surface.

[0107] In this embodiment, the end face of the second extension section 31 is an arc surface, which can make the end of the second extension section 31 relatively blunt, increase the curvature radius of the end of the second extension section 31, thereby facilitating the increase of the field strength difference between the first electrode 2 and the second electrode 3, making the field strength of the first electrode 2 higher than that of the second electrode 3, so that the plasma in the plasma generating device 100 is concentrated on the side of the first electrode 2, achieving the purpose of controlling the main plasma generation region. Among them, the end face of the second extension section 31 is set as an arc surface, which can be a spherical surface, an arc cylindrical surface bent along the width direction of the second extension section 31, an arc cylindrical surface bent along the thickness direction of the second extension section 31, or an annular surface bent in both the width direction and the thickness direction of the second extension section 31.

[0108] In an embodiment, the second extension section 31 is a flat structure with an arc-shaped end profile. Among them, the second extension section 31 can be a conductive sheet, a conductive film or a conductive coating. Setting the end profile of the second extension section 31 as an arc profile can also make the end of the second extension section 31 relatively blunt, increase the curvature radius of the end of the second extension section 31, thereby facilitating the increase of the field strength difference between the first electrode 2 and the second electrode 3, making the field strength of the first electrode 2 higher than that of the second electrode 3, so that the plasma in the plasma generating device 100 is concentrated on the side of the first electrode 2, achieving the purpose of controlling the main plasma generation region.

[0109] Please refer to Figure 7 , in an embodiment, the extending directions of the first extension section 21 and the second extension section 31 are the same. With this setting method, the plasma generated in the regions where the first extension section 21 and the second extension section 31 are located can diffuse in the same direction, so that the plasma generated on both sides of the dielectric layer 1 can be concentrated for use; for example, in some embodiments, the plasma generating device 100 is provided with a housing 4, and the dielectric layer 1, the first extension section 21 and the second extension section 31 are all arranged in the housing 4, and the first extension section 21 and the second extension section 31 can both point to the outlet 42 of the housing 4, so that the plasma generated in the regions where the first extension section 21 and the second extension section 31 are located can diffuse towards the outlet 41 and flow out from the outlet 42, which is beneficial to the diffusion and utilization of the plasma.

[0110] Please refer to Figure 11, in one embodiment, the first extension segment 21 is a wire. The end of the first extension segment 21 extends outward from the first plane 11, and the central axes of the first extension segment 21 and the second extension segment 31 are arranged at an angle. In the embodiment of the present application, the first extension segment 21 is a wire, and the second extension segment 31 is a strip-shaped structure with a certain length. The direction of the central axis of the second extension segment 31 is the length direction of the second extension segment 31. The central axes of the first extension segment 21 and the second extension segment 31 can be perpendicular to each other, or the central axes of the first extension segment 21 and the second extension segment 31 can be arranged at an acute angle, that is, the included angle α between the central axes of the first extension segment 21 and the second extension segment 31 can be 5°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, and any value not exceeding 90°. The end of the first extension segment 21 extends outward from the first plane 11, so that a linear discharge region is formed on one side of the first plane 11. And the first extension segment 21 is arranged as a wire, making it relatively thinner than the second extension segment 31. Thus, the field strength of the discharge electric field on one side of the first extension segment 21 can also be higher than that of the discharge electric field on one side of the second extension segment 31, causing the plasma to be concentrated on one side of the first extension segment 21.

[0111] In one embodiment, the second extension segment 31 is a conductive sheet; or, the second extension segment 31 is a conductive film; or, the second extension segment 31 is a conductive coating provided on the surface of the dielectric layer 1; or, the plasma generating device 100 further includes a second carrier disposed opposite to the dielectric layer 1, and the second extension segment 31 is a conductive coating provided on the surface of the second carrier.

[0112] In this embodiment, the second extension section 31 can be set as one of a conductive sheet, a conductive film, a conductive coating, etc. When the second extension section 31 is set as a conductive sheet, its thickness can be set according to actual needs and can generally be made of metal materials such as silver, gold, copper, carbon materials, conductive polymers or other materials, so that the structural strength of the second extension section 31 is relatively good and the performance stability is good; when the second extension section 31 is made in the form of a conductive film and a conductive coating, the thickness of the second extension section 31 is smaller, which is beneficial to reducing the thickness and volume of the plasma generating device 100, facilitating the application of the plasma generating device 100 in a small space, and improving the applicability and flexibility of use; among them, the conductive coating can be directly provided on the surface of the dielectric layer 1 to further reduce the overall thickness of the second extension section 31 and the dielectric layer 1. In addition, a second carrier can also be provided for setting the conductive coating to form the second extension section 31 disposed opposite to the dielectric layer 1. Among them, the conductive sheet, the conductive film, the conductive coating, etc. can all set the second extension section 31 into the required shape and structure according to actual needs. For example, in the above embodiment, the end of the second extension section 31 is set as an arc, etc., so that the electric field strength on one side of the second extension section 31 is lower than that of the first extension section 21, playing a role in controlling the plasma generation region.

[0113] In some embodiments, the second electrode 3 further includes a second power connection section 32 extending outside the dielectric layer 1. The second power connection section 32 can be made of the same material and structure as the first extension section 21, which is convenient for manufacturing the second electrode 3. For example, the second electrode 3 is integrally a conductive sheet or all are conductive films, etc.; the second power connection section 32 can also be set as other structures. For example, a part of the second electrode 3 disposed opposite to the dielectric layer 1 can be set as a conductive sheet, and the second power connection section 32 can be set as a wire.

[0114] Please refer to Figures 2 to 4 , in an embodiment, the dielectric layer 1 is an insulating plate. The insulating plate can be made of materials such as ceramics and quartz, has a certain structural strength, and is not easily deformed or damaged; the thickness of the insulating plate can be set according to actual needs and the installation space of the application environment of the plasma generating device 100, or conditions such as the required working voltage. In some embodiments, it can also be used as a carrier for the first electrode 2 and the second electrode 3 to reduce the thickness of the plasma generating device 100.

[0115] In an embodiment, the dielectric layer 1 is an insulating coating provided on the surface of the second extension section 31. Among them, the insulating coating can be a polytetrafluoroethylene coating, insulating paint, etc. The dielectric layer 1 can only include one insulating coating. Setting the insulating coating on the surface of the second electrode 3 is beneficial to reducing the thickness and volume of the plasma generating device 100, facilitating the application of the plasma generating device 100 in a small space, and improving the applicability and flexibility of use.

[0116] The dielectric layer 1 may also include an insulating carrier layer and at least one insulating coating. The insulating carrier layer may be the insulating plate in the foregoing embodiments. At least one insulating coating is provided on the surface of the insulating carrier layer, which can not only improve the insulation performance of the dielectric layer 1, but also reduce the thickness of the dielectric layer 1, thereby reducing the thickness and volume of the plasma generating device.

[0117] Please refer to Figure 12 and Figure 13 , in an embodiment, the dielectric layer 1 covers the outer surface of the second extension section 31; it may be that an insulating coating is coated on the surface of the second extension section 31 to serve as the dielectric layer, so that the dielectric layer covers the second extension section; or an insulating sleeve may be provided to sleeve the second extension section to serve as the dielectric layer; for example, a glass cover may be provided to cover the outside of the second extension section or an insulating sleeve may be injection-molded outside the second extension section; this setting method can make the creepage distance between the second extension section and the first extension section almost infinitely large, so as to better insulate the first extension section and the second extension section.

[0118] In an embodiment, the first electrode 2 has at least two first extension sections 21.

[0119] In this embodiment, at least two first extension sections 21 may be provided on the first electrode 2. The at least two first extension sections 21 may be arranged side by side, or may be arranged in a circumferential array. When the at least two first extension sections 21 are arranged in a circumferential array, the at least two first extension sections 21 may be arranged radially, or a plasma concentration area may be provided, so that the at least two first extension sections 21 are arranged along the circumference of the plasma concentration area, and each first extension section 21 points to the plasma concentration area. This setting method can increase the plasma generation amount on one side of the first electrode 2, improve the sterilization and purification effects, and at least two plasma generation areas can be provided on one side of the first electrode 2 according to requirements, improving the setting flexibility.

[0120] In some embodiments, the plasma generating device 100 is provided with at least two first electrodes 2, and each of the at least two first electrodes 2 is provided with a first extension section 21 disposed opposite to the dielectric layer 1.

[0121] In this embodiment, at least two first electrodes 2 may be provided. The first extension segments 21 of each first electrode 2 may be respectively disposed in the region where plasma is to be generated, and may be irregularly distributed, or may be arranged side by side or in a circumferential array. Among them, when the first extension segments 21 of each first electrode 2 are arranged in a circumferential array, the first extension segments 21 may point to the central region enclosed by each first extension segment 21, or the first extension segments 21 of at least two first electrodes 2 may be arranged radially. Similarly, the plasma generation amount on one side of the first electrode 2 can be increased, the sterilization and purification effects can be improved, and the plasma can be aggregated and generated in at least two different regions on one side of the first electrode 2 according to requirements, improving the setting flexibility.

[0122] Please refer to Figure 1 and Figure 2 , in an embodiment, the plasma generating device 100 further includes a housing 4. An accommodation space is formed in the housing 4, and at least one outlet 42 communicating with the accommodation space is provided. The dielectric layer 1, at least part of the first electrodes 2, and at least part of the second electrodes 3 are disposed in the accommodation space, and the first extension segment 21 extends toward one of the outlets 42.

[0123] In this embodiment, the plasma generating device 100 is provided with a housing 4. An accommodation space 41 is formed in the housing 4 for integrating structures such as the first electrode 2, the second electrode 3, and the dielectric layer 1 into an integral structure, and can protect the first electrode 2, the second electrode 3, the dielectric layer 1, etc. In addition, an outlet 42 communicating with the accommodation space 41 is provided on the housing 4, and the generated plasma can diffuse outward from the outlet 42, so that the plasma diffusion region of the plasma generating device 100 can be controlled.

[0124] Among them, the outlet 42 on the housing 4 may be disposed opposite to the surface of the dielectric layer 1, or the outlet 42 may be located on the side of the dielectric layer 1, for example, opened on the side surface of the housing 4 pointed by the first extension segment 21. In addition, one outlet 42 may be provided on the housing 4, and the end of the first extension segment 21 extends toward the direction close to the outlet 42, so that the plasma diffused to the end of the first extension segment 21 can diffuse to the outlet 42 and diffuse outward.

[0125] In some embodiments, two or more outlets 42 may also be provided. For example, two outlets 42 may be provided and respectively disposed opposite to the first extension segment 21 and the second extension segment 31 on both sides of the dielectric layer 1. It can be understood that when the plasma generating device 100 is in an energized state, there is also partial plasma generation in the region of the second extension segment 31. Providing the outlet 42 corresponding to the second electrode 3 facilitates the outward diffusion of the plasma generated on one side of the second electrode 3, improving the efficiency of plasma outward discharge and the utilization rate of plasma.

[0126] Please refer to Figure 2 , in some embodiments, the housing 4 includes a first half-shell 43 and a second half-shell 44 which are oppositely arranged, and the first half-shell 43 and the second half-shell 44 can be opened and closed relative to each other to facilitate the disassembly and assembly of structures such as the first electrode 2, the second electrode 3, and the dielectric layer 1.

[0127] Please refer to Figure 1 , in an embodiment, one of the outlets 42 is oppositely arranged with respect to the first plane 11, and the end of the first extension section 21 is exposed at the outlet 42. With such an arrangement, it is beneficial for the plasma to be discharged outward from the outlet 42, improving the plasma discharge efficiency, and beneficial for enhancing the disinfection and purification effects of the plasma generating device 100.

[0128] Please refer to Figure 1 , in an embodiment, the housing 4 is further provided with a diversion structure 49, and the diversion structure 49 extends from the edge of the outlet 42 towards the outside of the housing 4, and the end of the first extension section 21 is arranged towards the diversion structure 49.

[0129] In this embodiment, the diversion structure 49 is arranged on the housing 4, and the diversion structure 49 is located in front of the end of the first extension section 21 and extends from the edge of the outlet 42 in a direction away from the housing 4. With such an arrangement, when the plasma diffuses from the first extension section 21 to the end and continues to diffuse forward, it will be blocked by the diversion structure 49, and then diffuse along the surface of the diversion structure 49 in a direction away from the housing 4; among them, the extending direction of the diversion structure 49 can be consistent with the axial direction of the outlet 42, or can be inclined relative to the axial direction of the outlet 42, which is not limited herein. The setting of the diversion structure 49 further adjusts the diffusion direction of the plasma, enabling the application of the plasma generating device 100 to be more flexible.

[0130] Please refer to Figure 2 and Figure 14 , in an embodiment, a first installation groove 45 is arranged on the inner surface of the housing 4, and at least part of the first extension section 21 is arranged in the first installation groove 45.

[0131] In this embodiment, the first installation groove 45 can be arranged on the inner surface of the housing 4 for installing the first extension section 21 to limit the first extension section 21, improving the stability of the installation position of the first extension section 21, and thus accurately controlling the plasma generation and diffusion regions.

[0132] In some embodiments, a second installation groove 46 is arranged on the inner surface of the housing 4, and at least part of the second extension section 31 is arranged in the second installation groove 46. This setting method can improve the installation accuracy of the position of the second electrode 3 and avoid the deviation of the second electrode 3.

[0133] Please refer to Figure 2 andFigure 14 In one embodiment, a first limiting groove 47 is provided on the inner surface of the housing 4. The first electrode 2 is provided with a first limiting portion 23. The first limiting portion 23 is connected to the side of the first extension section 21, and the first limiting portion 23 is arranged in the first limiting groove 47.

[0134] In this embodiment, the first electrode 2 is provided with a first limiting portion 23. The first limiting portion 23 is connected to the side of the first extension section 21. A first limiting groove 47 for limiting and installing the first limiting portion 23 is provided on the inner surface of the housing 4, which improves the bonding strength between the first electrode 2 and the housing 4, and can limit the first electrode 2 to improve the installation position stability of the first extension section 21, so as to accurately control the plasma generation and diffusion regions.

[0135] In some embodiments, a second limiting groove 48 is provided on the inner surface of the housing 4. The second electrode 3 is provided with a second limiting portion 33. The second limiting portion 33 is connected to the edge of the second extension section 31, and the second limiting portion 33 is arranged in the second limiting groove 48. Alternatively, the second electrode 3 can be provided with a second limiting portion 33. The second limiting portion 33 is connected to the side of the second extension section 31. Correspondingly, a second limiting groove 48 is provided on the inner surface of the housing 4, so that the second limiting portion 33 is limited and installed in the second limiting groove 48, thereby improving the bonding strength between the second electrode 3 and the housing 4, avoiding problems such as offset and shaking of the second electrode 3 in the housing 4, and improving the overall structural integrity and performance stability of the plasma generating device 100.

[0136] Please refer to Figure 1 In one embodiment, a part of the first electrode 2 extends to the outside of the housing 4 to form a first power connection section 22.

[0137] In this embodiment, the first electrode 2 passes through the housing 4. The part of the first electrode 2 located outside the housing 4 forms a first power connection section 22, which is used to connect an external power source to apply a voltage to the first electrode 2. With this setting, when applying the plasma generating device 100, it is not necessary to disassemble the housing 4 to connect the first electrode 2 and the external power source. When it is necessary to remove the plasma generating device 100, the connection between the first electrode 2 and the external power source can also be directly disconnected outside the housing 4, improving the usability of the plasma generating device 100.

[0138] Please refer to Figure 1, in one embodiment, a part of the second electrode 3 extends outside the housing 4 to form a second power connection section 32. In some embodiments, the second electrode 3 is passed through the housing 4, and the part of the second electrode 3 located outside the housing 4 forms the second power connection section 32, which is used to connect an external power supply to apply a voltage to the second electrode 3. With such a setting, when applying the plasma generating device 100, it is not necessary to disassemble the housing 4 to connect the second electrode 3 and the external power supply. When it is necessary to remove the plasma generating device 100, the connection between the second electrode 3 and the external power supply can also be directly disconnected outside the housing 4, improving the convenience of use of the plasma generating device 100.

[0139] Optionally, referring to Figure 7 , the extending directions of the first power connection section 22 and the second power connection section 32 are the same, which is convenient for the plasma generating device to be powered.

[0140] In some embodiments, referring to Figure 4 and Figure 8 , the extending directions of the first power connection section 22 and the second power connection section 32 are different. For example, the first power connection section 22 and the second power connection section 32 extend in opposite directions, or the extending directions of the first power connection section 22 and the second power connection section 32 are perpendicular to each other or arranged at an angle. With such a setting, problems such as short circuit caused by too short a distance when the first power connection section 22 and the second power connection section 32 are arranged on the same side are avoided, improving the use safety.

[0141] The present application also proposes an electrical appliance. The electrical appliance is provided with the plasma generating device 100 in any of the foregoing embodiments. The specific structure of the plasma generating device 100 refers to the above embodiments. Since the electrical appliance adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. Among them, the electrical appliance may be, but is not limited to, an air conditioner, an air purifier, a floor washer, etc. The plasma generated by the plasma generating device 100 provided in the electrical appliance can reduce the toxic and harmful substances contained in the air blown out by the air conditioner and the air purifier, and can also purify, sterilize, and disinfect the water used for cleaning in the floor washer.

[0142] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A plasma generating device, characterized in that: The invention comprises a dielectric layer, a first electrode and a second electrode, wherein the dielectric layer has a first plane and a second plane which are arranged opposite to each other; At least part of the first electrodes is configured as a first extension segment, and the first extension segment is disposed on the first plane or spaced apart from the first plane; At least a portion of the second electrode is configured as a second extension segment, the second extension segment has a plane that is in contact with the second plane or is arranged opposite to the second plane, and the first extension segment and the second extension segment are separated by the dielectric layer.

2. A plasma generating device, characterized in that: The invention comprises a dielectric layer, a first electrode and a second electrode, wherein the dielectric layer has a first plane and a second plane which are arranged opposite to each other; At least part of the first electrode is configured as a first extension segment, the first extension segment is arranged on the first plane or is spaced apart from the first plane, at least part of the second electrode is configured as a second extension segment, the second extension segment is arranged on the second plane or is spaced apart from the second plane, the first extension segment and the second extension segment are separated by the dielectric layer, and the first extension segment and the second extension segment have different shapes; Wherein, when voltage is applied to the first electrode and the second electrode, the field strength of the discharge electric field of the first extension segment is higher than the field strength of the discharge electric field of the second extension segment.

3. The plasma generating device according to claim 1 or 2, characterized in that: The first extension segment and the second extension segment overlap in the orthographic projection portion of the dielectric layer; Or, the first extension segment and the second extension segment are connected at the orthographic projection edge of the dielectric layer; Alternatively, the first extension segment and the second extension segment are staggered in the orthographic projection of the dielectric layer.

4. The plasma generating device according to claim 1 or 2, characterized in that: The end of the first extension section is located in the area where the first plane is located, and the end of the second extension section is blunter than the end of the first extension section.

5. The plasma generating device according to claim 4, characterized in that: The cross-sectional size of the end portion of the first extension section is gradually reduced, and at least one side surface of the first extension section is configured as an inclined surface inclined relative to the extension direction of the first extension section.

6. The plasma generating device according to claim 5, characterized in that: The end of the first extension section forms a tip.

7. The plasma generating device according to claim 5, characterized in that: At least in the end region of the first extension section, the width of the first extension section is gradually reduced along the extension direction of the first extension section; And / or, at least in an end region of the first extension segment, a thickness of the end portion of the first extension segment is gradually reduced along an extension direction of the first extension segment.

8. The plasma generating device according to claim 6, characterized in that: The first extension section is a conductive sheet; Or, the first extension section is a conductive film; Or, the first extension section is a conductive coating provided on the surface of the dielectric layer; Alternatively, the plasma generating device further comprises a first carrier disposed opposite to the dielectric layer, and the first extension section is a conductive coating disposed on a surface of the first carrier; Alternatively, the first extension section is a conductive needle.

9. The plasma generating device according to claim 4, characterized in that: The first extension section is a wire.

10. The plasma generating device according to claim 4, characterized in that: The projection profile of the end surface of the second extension section on the second plane is an arc; And / or, the cross-sectional profile of the end surface of the second extension section in the thickness direction is arc-shaped.

11. The plasma generating device according to claim 4, characterized in that: The end surface of the second extension section is a curved surface; Alternatively, the second extension section is a flat structure with an arc-shaped end contour.

12. The plasma generating device according to claim 1 or 2, characterized in that: The first extension section is a wire, an end of the first extension section extends outward from the first plane, and the first extension section and the center axis of the second extension section are arranged at an angle.

13. The plasma generating device according to claim 1 or 2, characterized in that: The second extension section is a conductive sheet; Or, the second extension section is a conductive film; Or, the second extension section is a conductive coating provided on the surface of the dielectric layer; Alternatively, the plasma generating device further comprises a second carrier disposed opposite to the dielectric layer, and the second extension section is a conductive coating disposed on a surface of the second carrier.

14. The plasma generating device according to claim 1 or 2, characterized in that: The dielectric layer is an insulating plate; Alternatively, the dielectric layer is an insulating coating provided on the surface of the second extension segment.

15. The plasma generating device according to claim 1 or 2, characterized in that: The dielectric layer is coated on the outer surface of the second extension section.

16. The plasma generating device according to claim 1 or 2, characterized in that: The first electrode has at least two first extension segments; And / or, the plasma generating device is provided with at least two first electrodes, and at least two first electrodes are provided with the first extension section arranged opposite to the dielectric layer.

17. The plasma generating device according to claim 4, characterized in that: The plasma generating device further comprises a shell, wherein a placement space is formed in the shell, and at least one outlet communicating with the placement space is opened; The dielectric layer, at least a portion of the first electrode, and at least a portion of the second electrode are disposed in the placement space, and the first extension section is extended toward one of the outlets.

18. The plasma generating device according to claim 17, characterized in that: One of the outlets is disposed opposite to the first plane, and the first extension section is exposed at the outlet.

19. The plasma generating device according to claim 18, characterized in that: The shell is further provided with a flow guiding structure, and the flow guiding structure extends from the edge of the outlet to the outside of the shell, and the end of the first extension section is arranged toward the flow guiding structure.

20. The plasma generating device according to claim 17, characterized in that: The shell is provided with at least two outlets, wherein the two outlets are respectively located on two sides of the dielectric layer and are respectively arranged opposite to the first extension section and the second extension section.

21. The plasma generating device according to claim 17, characterized in that: The inner surface of the shell is provided with a first installation groove, and at least a part of the first extension section is arranged in the first installation groove. And / or, the inner surface of the shell is provided with a first limiting groove, the first electrode is provided with a first limiting portion, the first limiting portion is connected to the side of the first extension section, and the first limiting portion is arranged in the first limiting groove; 22. The plasma generating device according to claim 17, characterized in that: The inner surface of the housing is provided with a second mounting groove, and at least a portion of the second extension section is arranged in the second mounting groove; And / or, a second limiting groove is provided on the inner surface of the shell, the second electrode is provided with a second limiting portion, the second limiting portion is connected to the side of the second extension section, and the second limiting portion is arranged in the second limiting groove.

23. The plasma generating device according to claim 17, characterized in that: A portion of the first electrode extends to the outside of the shell to form a first power connection section; And / or, part of the second electrode extends to the outside of the shell to form a second power connection section.

24. An electrical device, characterized in that: The electrical equipment is provided with a plasma generating device as described in any one of claims 1 to 23.

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