Plasma generating devices and electrical equipment

Abstract

The present invention discloses a plasma generating device and an electrical device, which relate to the field of plasma technology, wherein the plasma generating device comprises a dielectric layer, a first electrode and a second electrode, the dielectric layer has a first plane and a second plane arranged back to back; 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 a distance from the first plane; at least part of the second electrode is arranged as a second extension section, the second extension section has a plane that is in contact with the second plane or is arranged opposite to the second plane, and the first extension section and the second extension section are separated by the dielectric layer. The technical solution of the present application can make the generation position of plasma in the plasma generating device controllable.

Description

Technical Field

[0001] The invention relates to the field of plasma technology, in particular to a plasma generating device and electrical equipment. Background Art

[0002] Plasma sterilization and purification uses the energy and active components generated by discharge between two electrodes to kill VOCs (volatile organic compounds) and viruses and bacteria in the air, generating water and carbon dioxide, which has advantages over other air purification technologies. Summary of the invention

[0003] The main purpose of the present invention is to provide a plasma generating device, aiming to make the generating position of plasma in the plasma generating device controllable.

[0004] To achieve the above object, the plasma generating device provided by the present invention comprises a dielectric layer, a first electrode and a second electrode, wherein the dielectric layer has a first plane and a second plane disposed back to back;

[0005] At least part of the first electrode is configured as a first extension segment, the first extension segment is disposed on the first plane or spaced apart from the first plane, and the first extension segment and the second extension segment are separated by the dielectric layer;

[0006] At least a portion of the second electrode is configured as a second extension segment, and the second extension segment has a plane that is in contact with the second plane or is arranged opposite to the second plane.

[0007] The present invention also provides a plasma generating device, comprising a dielectric layer, a first electrode and a second electrode, wherein the dielectric layer has a first plane and a second plane disposed back to back;

[0008] 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;

[0009] 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.

[0010] In one embodiment, the first extension segment and the second extension segment overlap in the orthographic projection portion of the dielectric layer;

[0011] Or, the first extension segment and the second extension segment are connected at the orthographic projection edge of the dielectric layer;

[0012] Alternatively, the first extension segment and the second extension segment are staggered in the orthographic projection of the dielectric layer.

[0013] In one embodiment, 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.

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

[0015] In one embodiment, the cross-sectional dimension of the end portion of the first extension segment is tapered, and at least one side surface of the first extension segment is configured as an inclined surface inclined relative to the extension direction of the first extension segment.

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

[0017] In one embodiment, 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;

[0018] 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.

[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] 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;

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

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

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

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

[0027] In one embodiment, the end surface of the second extension section is a curved surface;

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

[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] 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.

[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 segment.

[0035] In one embodiment, the dielectric layer is coated on the outer surface of the second extension segment.

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

[0037] 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.

[0038] In one embodiment, the plasma generating device further comprises a housing, wherein a placement space is formed in the housing, and at least one outlet communicating with the placement space is opened;

[0039] 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.

[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 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.

[0042] In one embodiment, 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.

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

[0044] And / or, a first limiting groove is provided on the inner surface of the shell, 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 portion of the second electrode is disposed in the second mounting groove;

[0046] 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.

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

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

[0049] The present application also proposes an electrical device, which is provided with a plasma generating device as described in any of the aforementioned embodiments.

[0050] The technical solution of the present application is to set a first extension section on the first electrode of the plasma generator so that the first extension section and the second electrode are separated by an insulating dielectric layer. When applied, alternating current can be passed through the first electrode and the second electrode. Due to the barrier of the dielectric layer, direct breakdown discharge cannot be achieved, so that a dielectric barrier discharge along the surface of the dielectric layer can be formed to ionize the air to generate plasma. By setting the first extension section, the plasma can be concentrated on the edge area of ​​the first extension section on one side of the first electrode, so that the position of plasma generation on at least one side of the first electrode in the plasma generator can be controlled, which is convenient for the use of the plasma generated on one side of the first electrode to achieve a better sterilization and purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0052] Figure 1 A structural diagram of a first embodiment of a plasma generating device provided in the present application;

[0053] Figure 2 for Figure 1 An exploded view of the plasma generating device in FIG.

[0054] Figure 3 A schematic diagram of a second embodiment of a plasma generating device provided in the present application;

[0055] Figure 4 A side cross-sectional view of a third embodiment of a plasma generating device provided by the present application;

[0056] Figure 5 A side cross-sectional view of a fourth embodiment of a plasma generating device provided by the present application;

[0057] Figure 6 A side cross-sectional view of a fifth embodiment of a plasma generating device provided by the present application;

[0058] Figure 7 A side cross-sectional view of a sixth embodiment of a plasma generating device provided by the present application;

[0059] Figure 8 A schematic diagram of a seventh embodiment of a plasma generating device provided in the present application;

[0060] Fig. 9 An exploded view of an eighth embodiment of a plasma generating device provided by the present application;

[0061] Fig.10 A schematic diagram of a ninth embodiment of a plasma generating device provided by the present application;

[0062] Fig.11 A schematic diagram of a tenth embodiment of a plasma generating device provided by the present application;

[0063] Fig.12 A schematic diagram of an eleventh embodiment of a plasma generating device provided in the present application;

[0064] Fig.13 for Fig.12 A side cross-sectional view of a plasma generating device;

[0065] Fig.14 This is a structural diagram of an embodiment of a first half shell of a shell in a plasma generating device provided in the present application.

[0066] Description of Figure Numbers:

[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 limiter; 3. Second electrode; 31. Second extension section; 32. Second power connection section; 33. Second limiter; 4. Shell; 41. Accommodating space; 42. Outlet; 43. First half shell; 44. Second half shell; 45. First mounting groove; 46. Second mounting groove; 47. First limiter; 48. Second limiter; 49. Guide structure.

[0068] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] Plasma sterilization and purification uses the energy and active components generated by the discharge between two electrodes to kill VOCs (volatile organic compounds) and viruses and bacteria in the air, and generate water and carbon dioxide, which has advantages over other air purification technologies. In related technologies, most plasma generators use two plate-shaped electrodes that are relatively arranged on both sides of a dielectric (insulator) to discharge between the two plate-shaped electrodes. Under such a structure, plasma is randomly generated near the two electrodes, and the location of plasma generation cannot be controlled on a finer scale. In addition, the generation of plasma requires the local electric field strength to reach the breakdown electric field strength of the gas, and most plasma generators generate more plasma by increasing the voltage, which results in the need for a larger excitation voltage.

[0071] In order to solve the above problems, the present application proposes a plasma generating device 100 for utilizing plasma to oxidize organic pollutants such as VOCs and kill bacteria and viruses to purify gases such as air, and can also be used to purify some non-conductive liquids.

[0072] See also Figures 1 to 4In one embodiment of the present application, a 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 that are arranged back to back. At least a portion of the first electrode 2 is configured as a first extension segment 21, and the first extension segment 21 is arranged on the first plane 11 or is spaced apart from the first plane 11. At least a portion of the second electrode 3 is configured as a second extension segment 31, and the second extension segment 31 has a plane that is in contact with the second plane 12 or is arranged opposite to the second plane 12. The first extension segment 21 and the second extension segment 31 are separated by the dielectric layer 1.

[0073] 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, wherein the first electrode 2 at least partially forms a first extension section 21 having a certain length, and the first extension section 21 can be a linear structure or a strip structure having a certain width; the second electrode 3 at least partially forms a second extension section 31 having a certain length, and the second extension section 31 has a strip structure having a certain width, and the second extension section 31 has two planes arranged back to back. At least part of the dielectric layer is set as a planar dielectric structure, and has a first plane 11 and a second plane 12 arranged back to back, the first extension section 21 can be set on the first plane 11 or spaced from the first plane 11, one side plane of the second extension section 31 is in contact with the second plane 12 or arranged opposite to the second plane 12, and the dielectric layer 1 can be made of insulating materials such as quartz and ceramics; it can be a plate-like structure separated between the first electrode 2 and the second electrode 3, or it can be an insulating coating coated on the surface of the second extension section 31, and 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 arranged 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 arranged as a conductive coating on the surface of the dielectric layer 1, which can reduce the overall thickness of the second electrode 3 and the dielectric layer 1, thereby facilitating the reduction of the thickness of the plasma generator 100; and can also reduce the straight-line distance between the first electrode 2 and the second electrode 3, thereby reducing the excitation voltage of the plasma generator 100 and improving the safety of use.

[0075] In some embodiments, the second electrode 3 can also be spaced apart from the dielectric layer 1. In this way, the distance between the second electrode 3 and the first electrode 2 is relatively increased, the insulation performance between the first electrode 2 and the second electrode 3 can be improved, the risk of voltage breakdown and other problems can be reduced, and the safety of use can be improved.

[0076] The first electrode 2 and the second electrode 3 are separated by the dielectric layer 1, and a dielectric barrier discharge can be formed between the first electrode 2 and the second electrode 3. When the power supply is powered to any one of the first electrode 2 and the second electrode 3, an alternating current can be supplied to the first electrode 2 and the second electrode 3, and a voltage difference is generated between the first electrode 2 and the second electrode 3, so that a dielectric barrier discharge is formed on the surface of the dielectric layer 1, and acts on the fluid (for example, air, exhaust gas or liquid from certain processes) flowing through the first electrode 2 and the second electrode 3, so that the fluid and the substances in the fluid are charged and become a plasma state, so as to generate plasma, so as to kill VOCs and viruses and bacteria in the fluid, and generate water and carbon dioxide, thereby achieving a purification effect.

[0077] Compared with the method of setting plate-shaped electrodes on both sides of the dielectric layer 1, the plasma on one side of the first electrode 2 is concentrated in the edge area or end area of ​​the first extension section 21 in the present application, thereby controlling the generation area and diffusion area of ​​the plasma on one side of the first electrode 2, which is beneficial to the utilization of the plasma.

[0078] In some embodiments, the second extension segment 31 has a different shape from the first extension segment 21. This arrangement can be used to set the shapes of the first extension segment 21 and the second extension segment 31 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 segment 21 is higher than the field strength of the discharge electric field on the side of the second extension segment 31, so that more plasma is generated on the side with higher field strength; for example, in the following embodiment, the end of the second extension segment 31 arranged opposite to the dielectric layer 1 in the second electrode 3 is blunter than the end of the first extension segment 21; or the first extension segment 21 is arranged as a wire, and the extension direction of the first extension segment 21 is perpendicular or approximately perpendicular to the extension direction of the second extension segment 31, and the first extension segment 21 forms a linear discharge area; both can make the field strength of the discharge electric field on the side of the first extension segment 21 higher than the field strength of the discharge electric field on the side of the second extension segment 31 when a voltage is applied to the first electrode 2 and the second electrode 3, so that plasma is concentrated on the side of the first extension segment 21, and the amount of plasma generated on the side of the first extension segment 21 is increased. This arrangement is conducive 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 facilitating reducing the thickness of the plasma generating device 100; and 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 safety of use.

[0080] In some embodiments, the first extension section 21 is spaced from the first plane 11 of the dielectric layer 1, and there is an air gap between the first extension section 21 and the dielectric layer 1. In this case, the contact area between the first extension section 21 and the air is increased, which can increase the ionization efficiency, improve the efficiency and amount of plasma generation, and help improve 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 voltage breakdown and other problems can be reduced, and the safety of use can be improved.

[0081] The technical solution of the present application is to arrange the first extension section 21 on the first electrode 2 of the plasma generating device 100 so that the first extension section 21 and the second extension section 31 are separated by the insulating dielectric layer 1; when applied, an alternating current can be passed through the first electrode 2 and the second electrode 3, and due to the obstruction of the dielectric layer 1, direct breakdown discharge cannot be performed, so that a dielectric barrier discharge can be formed on the surface of the dielectric layer 1 to ionize the air to generate plasma; and by the arrangement of the first extension section 21, plasma can be concentratedly generated at the edge area of ​​the first extension section 21 on one side of the first electrode 2, so that the plasma generation position in the plasma generating device 100 is controlled at the position of the first extension section 21, which facilitates the use of the plasma generated on one side of the first electrode 2 and achieves a better sterilization and purification effect.

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

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

[0084] Compared with the method of making the projections of the first extension section 21 and the second extension section 31 offset from each other, making the orthographic projections of the first extension section 21 and the second extension section 31 partially overlap on the dielectric layer 1 can minimize the shortest distance D between the first extension section 21 and the second extension section 31, thereby reducing the excitation voltage and improving the safety of use. It can also reduce the overall thickness of the plasma generator 100 and reduce the volume, which is conducive to the application of the plasma generator 100 in a small space.

[0085] Please refer to Figure 5In one embodiment, the first extension section 21 and the second extension section 31 are connected at the edge of the orthographic projection of the dielectric layer 1. This arrangement can also minimize the shortest distance D between the first extension section 21 and the second extension section 31, thereby reducing the excitation voltage of the plasma generator 100 and the overall thickness of the plasma generator 100, reducing the volume and improving the safety of use.

[0086] Please refer to Figure 3 , Figures 8 to 10 In one embodiment, the end of the first extension section 31 is located in the area where the first plane 11 is located, and the end of the second extension section 31 is blunter than the end of the first extension section 21.

[0087] In this embodiment, the end of the first extension segment 21 is located in the area where the first plane 11 is located, and the end of the second extension segment 31 is blunter than the end of the first extension segment 21. For example, the end of the first extension segment 21 can be set to a pointed end, and the end of the second extension segment 31 can be set to a plane, a straight edge or an arc surface. The end radius of curvature of the second extension segment 31 can also be made larger than the end radius of curvature of the first extension segment 21. With such a configuration, when a voltage is applied to the first electrode 2 and the second electrode 3, the local field strength of the first extension segment 21 can be made greater than the local field strength of the second extension segment 31, so that plasma can be concentrated on one side of the first extension segment 21.

[0088] Please refer to Fig.10 In some embodiments, the first extension section 21 is a wire. The wire may be a metal wire. In this arrangement, the end of the first extension section 21 is close to a tip, which can also make the field strength of the discharge electric field of the first extension section 21 higher than the field strength of the discharge electric field of the second extension section 31, so that plasma can be concentrated in the end area of ​​the first extension section 21.

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

[0090] In this embodiment, one of the side surfaces of the first extension section 21 is an inclined surface inclined relative to the extension direction of the first extension section 21, and the cross-sectional size of the end of the first extension section 21 is gradually reduced; at this time, the end shape of the first extension section 21 can be roughly a truncated cone, a prism, a trapezoid or a pointed end. This arrangement can reduce the radius of curvature of the end of the first extension section 21, increase the local field strength of the first extension section 21, and better enable the plasma in the plasma generator 100 to be concentrated on the side of the first electrode 2. At the same time, by designing the shape of the end of the first extension section 21, the plasma generated in the area of ​​the first extension section 21 can diffuse toward the end direction of the first extension section 21, that is, the diffusion direction of the ion wind generated by the plasma aerodynamic effect is controlled, thereby forming a directional ion wind, so that the plasma generated by the plasma generator 100 from the side of the first electrode 2 can be controlled to diffuse outward, so that the plasma generated by the plasma generator 100 can diffuse to the required area as required, thereby achieving a better sterilization and purification effect.

[0091] In some embodiments, the end of the first extension section 21 forms a pointed tip. This arrangement further reduces the radius of curvature of the end of the first extension section 21, which is beneficial to increasing the difference in field strength 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.

[0092] Please refer to Figure 3 and Figure 4 The tip formed by the first extension section 21 can be a needle-shaped structure, or the end of the first extension section 21 can be roughly 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 one point at the end to form a tip; in addition, Fig. 9 As shown, the first extension section 21 has two surfaces that are arranged opposite to each other, 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 one embodiment, at least in the end region of the first extension segment 21 , the width of the first extension segment 21 is gradually reduced along the extension direction of the first extension segment 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 roughly a strip profile with a certain width, and has two side edges spaced apart in the width direction, and at least within a certain length range near the end of the first extension section 21, at least one side edge gradually extends in an inclined direction close to the other side edge, so that the width and cross-sectional size of the first extension section 21 gradually shrink, which can reduce the radius of curvature of the end of the first extension section 21, increase the local field strength of the first extension section 21, better enable the plasma in the plasma generator 100 to be concentrated on one side of the first electrode 2, and control the diffusion of the plasma toward the end of the first extension section 21.

[0095] It should be noted that, in the embodiment of the present application, the first extension section 21 may be a sheet electrode, a conductive film or a columnar electrode, etc., which is independent of the dielectric layer 1, and may be spaced apart from the dielectric layer 1 or combined with the dielectric layer 1 by bonding or the like; the first extension section 21 may also be a conductive plating layer disposed on the surface of the dielectric layer 1. In the present embodiment, it is only necessary to make the projection of the first extension section 21 on the dielectric layer 1 a strip structure, and the width at least at the end gradually decreases.

[0096] Please refer to Figure 4 In one embodiment, the thickness of the end portion of the first extension segment 21 is gradually reduced along the extension direction of the first extension segment 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 gradually reduced in the direction close to the end surface, so that at least one of the two surfaces in the thickness direction can be tilted in the direction close to the other surface, which can reduce the thickness of the end of the first extension section 21, which is conducive to reducing the overall thickness of the plasma generating device 100, and control the diffusion of plasma in the direction of the end of the first extension section 21, so as to achieve controllable ion wind flow direction. Among them, the two surfaces of the first extension section 21 in the thickness direction can be converged at the end to form an edge, or the two surfaces can be connected through the end surface.

[0098] In some embodiments, the surface of the first extension segment 21 away from the dielectric layer 1 is inclined toward the direction close to the dielectric layer 1, and the surface of the first extension segment 21 close to the dielectric layer 1 is in contact with or parallel to the dielectric layer 1. This can gradually reduce the thickness of the first extension segment 21 while avoiding increasing the distance between the first extension segment 21 and the second electrode 3, which is beneficial to reducing the excitation voltage of the plasma generating device 100 and improving the safety of use.

[0099] In one embodiment, the first extension segment 21 is a conductive sheet; or, the first extension segment 21 is a conductive film; or, the first extension segment 21 is a conductive coating provided on the surface of the dielectric layer 1; or, the plasma generating device 100 further includes a first carrier disposed opposite to the dielectric layer 1, and the first extension segment 21 is a conductive coating provided on the surface of the first carrier; or, the first extension segment 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, and a conductive needle. Wherein, when the first extension section 21 is a conductive sheet, its thickness can be set according to actual needs, and can be generally 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 of a conductive film and a conductive coating, the thickness of the first extension section 21 is small, which is conducive to reducing the thickness and volume of the plasma generating device 100, and is conducive to the application of the plasma generating device 100 in a small space, and improving the applicability and flexibility of use; wherein, the conductive coating can be directly set on the surface of the dielectric layer 1, further reducing the overall thickness of the first extension section 21 and the dielectric layer 1, and a first carrier can also be set to set the conductive coating to form the first extension section 21. Among them, the conductive sheet, conductive film, conductive coating, etc. can be set to the desired shape and structure of the first extension section 21 according to actual needs. For example, in the above embodiment, the end of the first extension section 21 is set to a tapered structure, for example, it can be set to a tip, so as to improve the field strength on one side of the first extension section 21, and can further control the plasma generation area 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 conducive to making the field strength of the discharge electric field of the first extension section 21 higher than the field strength of the discharge electric field of the second extension section 31, thereby 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 also includes a first power connection segment 22 connected to the first extension segment 21. The first power connection segment 22 can be made of the same material and structure as the first extension segment 21 to facilitate the manufacture of the first electrode 2. For example, the first power connection segment 22 and the first extension segment 21 are both conductive sheets or both are conductive films or wires, etc.; the first power connection segment 22 can also be different from the first extension segment 21. For example, the first extension segment 21 can be set as a conductive sheet, and the first power connection segment 22 can be set as a wire.

[0102] Please refer to Figure 3 In one embodiment, the projection profile of the end surface 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 roughly a strip profile with a certain width, and the positive projection profile of the end of the second extension section 31 on the surface of the dielectric layer 1 is an arc. Among them, the second extension section 31 can be a sheet electrode, a conductive film or a conductive coating disposed on the surface of the dielectric layer 1 that is independent of the dielectric layer 1. In this case, the profile of the second extension section 31 also roughly forms a strip structure with an arc-shaped end; the second extension section 31 can also be a columnar electrode, etc. In this case, the end face of the second extension section 31 can be a spherical surface, an arc-shaped cylindrical surface curved along the width direction of the second extension section 31, or a torus surface curved in both the width direction and the thickness direction of the second extension section 31. Such an arrangement can make the end of the second extension section 31 relatively blunt, increase the radius of curvature of the end of the second extension section 31, thereby facilitating increasing the difference in field strength between the first electrode 2 and the second electrode 3, making the field strength of the first electrode 2 higher than the field strength 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, thereby achieving the purpose of controlling the main plasma generating area.

[0104] Please refer to Figure 4 In one embodiment, the cross-sectional profile of the end surface 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 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 curved along the thickness direction of the second extension section 31, or a torus surface curved in both the width direction and the thickness direction of the second extension section 31. Such a setting can also make the end of the second extension section 31 relatively blunt, thereby increasing the curvature radius of the end of the second extension section 31, which is conducive 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 the side of the first electrode 2, and the purpose of controlling the main plasma generation area is achieved.

[0106] Please refer to Figure 3 and Figure 4 In one embodiment, the end surface of the second extension section 31 is a curved surface.

[0107] In this embodiment, the end surface 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 increasing the difference in field strength 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, and achieve the purpose of controlling the main plasma generation area. Among them, the end surface of the second extension section 31 is set as an arc surface, which can be a spherical surface, an arc-shaped cylindrical surface curved along the width direction of the second extension section 31, an arc-shaped cylindrical surface curved along the thickness direction of the second extension section 31, or a torus surface curved in both the width direction and the thickness direction of the second extension section 31.

[0108] In one embodiment, the second extension section 31 is a flat structure with an arc-shaped end profile. The second extension section 31 may be a conductive sheet, a conductive film or a conductive coating. Setting the end profile of the second extension section 31 to 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 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 the field strength 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, and the purpose of controlling the main plasma generation area is achieved.

[0109] Please refer to Figure 7 In one embodiment, the first extension section 21 and the second extension section 31 extend in the same direction. In this arrangement, 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 used in a concentrated manner; 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, so that the first extension section 21 and the second extension section 31 can be arranged to 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 toward 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 Fig.11In one embodiment, the first extension section 21 is a wire, the end of the first extension section 21 extends outward from the first plane 11, and the central axis of the first extension section 21 and the second extension section 31 are set at an angle. In the embodiment of the present application, the first extension section 21 is a wire, and the second extension section 31 is a strip structure with a certain length, wherein the central axis direction of the second extension section 31 is the length direction of the second extension section 31; the central axes of the first extension section 21 and the second extension section 31 can be perpendicular to each other, or the central axes of the first extension section 21 and the second extension section 31 can be set at an acute angle, that is, the angle α between the central axes of the first extension section 21 and the second extension section 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 section 21 extends outward from the first plane 11, so that the first extension section 21 forms a linear discharge area on one side of the first plane 11, and the first extension section 21 is configured as a conductive wire, so that it is thinner than the second extension section 31, thereby making the field strength of the discharge electric field on one side of the first extension section 21 higher than the field strength of the discharge electric field on the side of the second extension section 31, so that plasma is concentratedly generated on one side of the first extension section 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 supporting member disposed opposite to the dielectric layer 1, and the second extension segment 31 is a conductive coating provided on the surface of the second supporting member.

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

[0113] In some embodiments, the second electrode 3 also includes a second power connection segment 32 extending to the outside of the dielectric layer 1. The second power connection segment 32 can be made of the same material and structure as the first extension segment 21, which is convenient for the manufacture of the second electrode 3. For example, the second electrode 3 is a conductive sheet or a conductive film as a whole. The second power connection segment 32 can also be set to other structures. For example, the part of the second electrode 3 arranged opposite to the dielectric layer 1 can be set to a conductive sheet, and the second power connection segment 32 can be set to a wire.

[0114] Please refer to Figures 2 to 4 In one embodiment, the dielectric layer 1 is an insulating plate. The insulating plate can be made of ceramic, quartz or other materials, 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 generator 100, or the required working voltage and other conditions. In some embodiments, it can also be used as a carrier of the first electrode 2 and the second electrode 3 to reduce the thickness of the plasma generator 100.

[0115] In one embodiment, the dielectric layer 1 is an insulating coating disposed on the surface of the second extension section 31. The insulating coating may be a polytetrafluoroethylene coating, an insulating paint, etc. The dielectric layer 1 may include only one layer of insulating coating. Disposing 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 applicability and flexibility of use.

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

[0117] Please refer to Fig.12 and Fig.13 In one embodiment, the dielectric layer 1 is coated on the outer surface of the second extension section 31; wherein an insulating coating may be coated on the surface of the second extension section 31 as a dielectric layer, so that the dielectric layer covers the second extension section; an insulating sleeve may also be provided on the outside of the second extension section as a dielectric layer; for example, a glass cover may be provided on the outside of the second extension section or an insulating sleeve may be injection-molded on the outside of the second extension section; this arrangement can make the creepage distance between the second extension section and the first extension section almost infinite, thereby better insulating the first extension section and the second extension section.

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

[0119] In this embodiment, at least two first extension segments 21 can be arranged on the first electrode 2. The at least two first extension segments 21 can be arranged side by side or in a circumferential array. When each first extension segment 21 is arranged in a circumferential array, the at least two first extension segments 21 can be arranged radially, or a plasma concentration area can be set so that at least two first extension segments 21 are arranged circumferentially along the plasma concentration area, and each first extension segment 21 points to the plasma concentration area. This arrangement can increase the amount of plasma generated on one side of the first electrode 2, improve the sterilization and purification effects, and at least two plasma generation areas can be set on one side of the first electrode 2 according to needs, which improves the flexibility of the arrangement.

[0120] In some embodiments, the plasma generating device 100 is provided with at least two first electrodes 2 , and the at least two first electrodes 2 are each 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, and the first extension segments 21 of each first electrode 2 may be provided in the area where plasma is required to be generated, and may be irregularly distributed, or may be arranged side by side or arranged in a circumferential array or other regular arrangement, wherein when the first extension segments 21 of each first electrode 2 are arranged in a circumferential array, each first extension segment 21 may point to the middle area 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 amount of plasma generated on one side of the first electrode 2 may be increased, and the sterilization and purification effects may be improved. The plasma may also be gathered and generated in at least two different areas on one side of the first electrode 2 according to needs, thereby improving the flexibility of the arrangement.

[0122] Please refer to Figure 1 and Figure 2 In one embodiment, the plasma generating device 100 further includes a shell 4, a housing space is formed in the shell 4, and at least one outlet 42 connected to the housing space is opened, the dielectric layer 1, at least a portion of the first electrode 2 and at least a portion of the second electrode 3 are arranged in the housing space, and the first extension section 21 extends toward one of the outlets 42.

[0123] In this embodiment, the plasma generating device 100 is provided with a shell 4, and a housing space 41 is formed in the shell 4 for integrating 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, and the dielectric layer 1. In addition, an outlet 42 connected to the housing space 41 is provided on the shell 4, and the generated plasma can diffuse outward from the outlet 42, so that the plasma diffusion area of ​​the plasma generating device 100 can be controlled.

[0124] The outlet 42 on the shell 4 can be arranged opposite to the surface of the dielectric layer 1, or the outlet 42 can be located on the side of the dielectric layer 1, for example, on the side of the shell 4 pointed to by the first extension section 21. In addition, an outlet 42 can be opened on the shell 4, and the end of the first extension section 21 extends in a direction close to the outlet 42, so that the plasma diffused to the end of the first extension section 21 can diffuse to the outlet 42 and diffuse outward.

[0125] In some embodiments, two or more outlets 42 may be provided. For example, two outlets 42 may be provided and disposed opposite to the first extension section 21 and the second extension section 31 on both sides of the dielectric layer 1. It is understandable that when the plasma generating device 100 is in a powered-on state, some plasma is also generated in the region of the second extension section 31. The outlet 42 corresponding to the second electrode 3 is provided to facilitate outward diffusion of the plasma generated on one side of the second electrode 3, thereby improving the efficiency of the plasma discharge and improving the utilization rate of the plasma.

[0126] Please refer to Figure 2 In some embodiments, the shell 4 includes a first half shell 43 and a second half shell 44 that are arranged opposite to each other. 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 the first electrode 2, the second electrode 3, the dielectric layer 1 and other structures.

[0127] Please refer to Figure 1 In one embodiment, one of the outlets 42 is disposed opposite to the first plane 11, and the end of the first extension section 21 is exposed at the outlet 42. Such an arrangement is conducive to the discharge of plasma from the outlet 42, improves the plasma discharge efficiency, and is conducive to improving the disinfection and purification effect of the plasma generating device 100.

[0128] Please refer to Figure 1 In one embodiment, the shell 4 is further provided with a flow guiding structure 49 , which extends from the edge of the outlet 42 to the outside of the shell 4 , and the end of the first extension section 21 is arranged toward the flow guiding structure 49 .

[0129] In this embodiment, a guide structure 49 is provided on the shell 4. The guide structure 49 is located at the front side of the end of the first extension section 21 and extends from the edge of the outlet 42 in a direction away from the shell 4. With such a configuration, when the plasma diffuses from the first extension section 21 to the end and continues to diffuse forward, it will be blocked by the guide structure 49, and then diffuse along the surface of the guide structure 49 in a direction away from the shell 4; wherein, the extension direction of the guide structure 49 may be consistent with the axial direction of the outlet 42, or may be inclined relative to the axial direction of the outlet 42, which is not limited here. The configuration of the guide structure 49 further adjusts the diffusion direction of the plasma, which can make the application of the plasma generating device 100 more flexible.

[0130] Please refer to Figure 2 and Fig.14 In one embodiment, a first mounting groove 45 is disposed on the inner surface of the shell 4 , and at least a portion of the first extension section 21 is disposed in the first mounting groove 45 .

[0131] In this embodiment, a first mounting groove 45 can be provided on the inner surface of the shell 4 for mounting the first extension section 21 to limit the first extension section 21 and improve the stability of the mounting position of the first extension section 21, thereby accurately controlling the plasma generation and diffusion area.

[0132] In some embodiments, the inner surface of the housing 4 is provided with a second mounting groove 46, and at least part of the second extension section 31 is disposed in the second mounting groove 46. This arrangement can improve the position installation accuracy of the second electrode 3 and prevent the second electrode 3 from being offset.

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

[0134] In this embodiment, a first limiting portion 23 is provided on the first electrode 2, and the first limiting portion 23 is connected to the side of the first extension section 21. A first limiting groove 47 for limiting the installation of the first limiting portion 23 is provided on the inner surface of the shell 4, thereby improving the bonding strength between the first electrode 2 and the shell 4, and limiting the first electrode 2, improving the stability of the installation position of the first extension section 21, thereby accurately controlling the plasma generation and diffusion area.

[0135] In some embodiments, a second limiting groove 48 is provided on the inner surface of the shell 4, and a second limiting portion 33 is provided on the second electrode 3. The second limiting portion 33 is connected to the edge of the second extension section 31, and the second limiting portion 33 is provided in the second limiting groove 48. A second limiting portion 33 can also be provided on the second electrode 3, and 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 shell 4, so that the second limiting portion 33 is limitedly installed in the second limiting groove 48, thereby improving the bonding strength between the second electrode 3 and the shell 4, avoiding the problem of the second electrode 3 being offset and shaking in the shell 4, and improving the overall structural problem-solving property and performance stability of the plasma generating device 100.

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

[0137] In this embodiment, the first electrode 2 is inserted into the shell 4, and the portion of the first electrode 2 located outside the shell 4 forms a first power connection section 22 for connecting an external power source to apply voltage to the first electrode 2. With such a configuration, when the plasma generating device 100 is used, it is not necessary to disassemble the shell 4 and then connect the first electrode 2 and the external power source. When the plasma generating device 100 needs to be disassembled, the connection between the first electrode 2 and the external power source can also be directly disconnected outside the shell 4, thereby improving the convenience of using the plasma generating device 100.

[0138] Please refer to Figure 1In one embodiment, part of the second electrode 3 extends to the outside of the shell 4 to form a second power connection section 32. In some embodiments, the second electrode 3 is inserted into the shell 4, and the part of the second electrode 3 located outside the shell 4 forms the second power connection section 32, which is used to connect an external power supply to apply voltage to the second electrode 3; in this way, when the plasma generating device 100 is used, it is not necessary to disassemble the shell 4 and then connect the second electrode 3 and the external power supply. When the plasma generating device 100 needs to be disassembled, the connection between the second electrode 3 and the external power supply can also be directly disconnected outside the shell 4, thereby improving the convenience of using the plasma generating device 100.

[0139] Optionally, refer to Figure 7 The first power connection section 22 and the second power connection section 32 extend in the same direction, which facilitates power connection of the plasma generating device.

[0140] In some embodiments, reference Figure 4 and Figure 8 , the first power connection section 22 and the second power connection section 32 extend in different directions. For example, the first power connection section 22 and the second power connection section 32 extend in opposite directions, or the first power connection section 22 and the second power connection section 32 extend in perpendicular directions or at an angle to each other; such an arrangement avoids problems such as short circuits 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, thereby improving safety in use.

[0141] The present application also proposes an electrical device, which is provided with a plasma generator 100 as in any of the above embodiments. The specific structure of the plasma generator 100 refers to the above embodiments. Since the electrical device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the electrical device can be but not limited to air conditioners, air purifiers, and floor scrubbers. The plasma generated by the plasma generator 100 provided in the electrical device can reduce the toxic and harmful substances contained in the wind 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 scrubber.

[0142] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are 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 housing is provided with a first mounting groove, and at least a portion of the first extension section is arranged in the first mounting groove; And / or, a first limiting groove is provided on the inner surface of the shell, 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 provided 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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