Flat plate type plasma generator

Abstract

The utility model discloses a flat plate type plasma generator, which comprises a frame body and at least one dielectric barrier discharge unit, and the dielectric barrier discharge unit comprises a high-voltage flat plate electrode with a first lead, a grounding flat plate electrode with a second lead and an insulating dielectric plate arranged between the high-voltage flat plate electrode and the grounding flat plate electrode. The surface of the frame body is provided with a containing groove, the containing groove comprises a third assembling groove, a second assembling groove and a first assembling groove which are sequentially and integrally formed in the depth direction from the outer surface of the frame body, and the first assembling groove and the third assembling groove are provided with a first wiring groove and a second wiring groove which extend out of one end side of the frame body respectively; the high-voltage plate electrode, the insulating dielectric plate and the grounding plate electrode are respectively arranged in the first assembling groove, the second assembling groove and the third assembling groove, and the dielectric barrier discharge unit and the frame body form an integral structure through the limiting and fixing structure. The device has the advantages of being easy to assemble and good in working performance.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification, in particular to a flat-plate plasma generator. Background Art

[0002] The plasma generator using the dielectric barrier discharge unit is a high-voltage discharge device separated by an insulating dielectric barrier layer between two electrodes, and its shape can be flat, cylindrical or even surface discharge type. The overall shape of the common flat-plate plasma generator is roughly a strip plate, including a frame body, at least a pair of high-voltage flat-plate electrodes and a grounding flat-plate electrode arranged opposite to each other, and the electrodes are packaged and fixed by insulating terminals on each side of the frame body (for example, see Chinese patent CN207282907U). The use of insulating terminals for side packaging not only makes the assembly structure more complicated, but also the shape of the insulating terminals will be higher than the electrode surface, blocking the ions ionized from the electrode surface from being released to the surrounding air, thereby affecting the disinfection and purification performance of the plasma generator. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art, and provides a flat-plate plasma generator which does not need to use insulating terminals for side packaging.

[0004] The utility model provides a flat-plate plasma generator, comprising a frame body 1 and at least one dielectric barrier discharge unit, wherein the dielectric barrier discharge unit comprises a high-voltage flat plate electrode 21 having a first lead 211, a grounded flat plate electrode 23 having a second lead 231, and an insulating dielectric plate 22 arranged between the high-voltage flat plate electrode 21 and the grounded flat plate electrode 23;

[0005] The surface of the frame body 1 has a receiving groove for fixing the dielectric barrier discharge unit, and the receiving groove includes a third assembly groove 13, a second assembly groove 12 and a first assembly groove 11 which are integrally formed in sequence in the depth direction from the outer surface of the frame body 1, and the first assembly groove 11 and the third assembly groove 13 respectively have a first wiring groove 111 and a second wiring groove 131 extending from one end side of the frame body 1, and the first wiring groove 111 and the second wiring groove 131 are spaced apart and arranged at the wiring end side 19 of the frame body 1;

[0006] The high-voltage flat plate electrode 21, the insulating dielectric plate 22 and the grounding flat plate electrode 23 are respectively arranged in the first assembly groove 11, the second assembly groove 12 and the third assembly groove 13, and the dielectric barrier discharge unit and the frame body 1 are made into an integral structure through a limiting fixing structure, and the first lead 211 and the second lead 231 are respectively located in the first wiring groove 111 and the second wiring groove 131.

[0007] In some preferred embodiments, the longitudinal distance L1 between the bottom of the first assembly groove 11 and the outer surface of the frame body 1, the longitudinal distance L2 between the bottom of the second assembly groove 12 and the outer surface of the frame body 1, and the longitudinal distance L3 between the bottom of the third assembly groove 13 and the outer surface of the frame body 1, L1>L2>L3.

[0008] In some preferred embodiments, the surface of the grounding plate electrode 23 is not lower than the surface of the frame body 1 , or the surface of the frame body 1 is higher than the surface of the grounding plate electrode 23 by no more than 5 mm.

[0009] In some preferred embodiments, two side edges of the frame body 1 adjacent to the wiring end side 19 are respectively configured as first wind guide sides 10 that are inclined or curved.

[0010] In some preferred embodiments, a receiving groove is respectively disposed on two opposite surfaces of the frame body 1, and a dielectric barrier discharge unit is respectively disposed in each receiving groove.

[0011] In some preferred embodiments, the flat-plate plasma generator further includes a first wiring terminal 31 and a second wiring terminal 32 which are welded to the first lead 211 and the second lead 231 respectively.

[0012] In some preferred embodiments, the flat-plate plasma generator further comprises an insulating end cover 4 sleeved on the wiring end side 19 , and the first wiring terminal 31 and the second wiring terminal 32 are partially exposed outside the insulating end cover 4 .

[0013] In some preferred embodiments, the limiting fixing structure is a bonding structure, and the high-voltage flat plate electrode 21, the insulating dielectric plate 22 and the grounding flat plate electrode 23 are respectively fixed in the first assembly groove 11, the second assembly groove 12 and the third assembly groove 13 by surface or / and circumferential bonding.

[0014] In some preferred embodiments, the limiting fixing structure includes: a plurality of limiting columns 132 are arranged at the bottom of the third assembly groove 13, a plurality of limiting holes 232 are arranged correspondingly around the grounding plate electrode 23, and each limiting column 132 is respectively limited in one of the limiting holes 232.

[0015] In some preferred embodiments, the limiting and fixing structure includes: a limiting edge 18 extending from two opposite sides of the frame body 1 toward the third assembly groove 13, a slot 133 formed between the limiting edge 18 and the bottom of the third assembly groove 13, and the slot 133 extends out of the wiring end side 19 of the frame body 1 to form two opposite sides of the socket grounding plate electrode 23 inserted from the socket and limited in the slot 133.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the plasma generator disclosed by the utility model, the dielectric barrier discharge unit is fixed in a preformed receiving groove of the frame body by a limiting fixing structure to form an integral structure, so that the relative sides of the frame body do not need to be packaged using insulating terminals as in the prior art, which is not only easy to assemble, but also allows the positive and negative ions generated by the dielectric barrier discharge unit ionizing the air to quickly overflow from the surface of the grounded plate electrode to the surrounding air without hindrance, which is beneficial to improving the disinfection and purification performance of the plasma generator on the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the plasma generator disclosed in this application.

[0019] Figure 2 It is a front view of the first embodiment of the plasma generator.

[0020] Figure 3 , Figure 4 They are Figure 2 Schematic diagram of the cross-section of AA and BB.

[0021] Figure 5 It is a schematic structural diagram of the frame body in the first embodiment of the plasma generator.

[0022] Figure 6 Schematic diagram of the exploded structure of the first embodiment of the plasma generator.

[0023] Figure 7 It is a schematic diagram of the assembly structure of a plasma generator.

[0024] Figure 8 It is a front view of the second embodiment of the plasma generator.

[0025] Fig. 9 , Fig.10 They are Figure 8 Schematic diagram of the cross-section of AA and BB.

[0026] Fig.11 It is a schematic diagram of the three-dimensional structure of the third embodiment of the ion generator.

[0027] Fig.12 It is a front view of the third embodiment of the plasma generator.

[0028] Fig.13 , Fig.14 They are Fig.12 Schematic diagram of the cross-section of AA and BB. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific implementation methods, structures, features and effects of the present application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0030] Combination Figure 1-Figure 7 The first embodiment of the flat-plate plasma generator shown in the figure comprises a frame body 1 and at least one dielectric barrier discharge unit, wherein the dielectric barrier discharge unit comprises a high-voltage flat plate electrode 21 having a first lead 211, a grounding flat plate electrode 23 having a second lead 231, and an insulating dielectric plate 22 arranged between the high-voltage flat plate electrode 21 and the grounding flat plate electrode 23; the surface of the frame body 1 has a receiving groove for fixing the dielectric barrier discharge unit, and the receiving groove comprises a third assembly groove 13, a second assembly groove 12, and a first assembly groove 11 which are sequentially integrally formed in the depth direction from the outer surface of the frame body 1, the first assembly groove 11 and the third assembly groove 13 respectively have a first wiring groove 111 and a second wiring groove 131 extending from one end side of the frame body 1, and the first wiring groove 111 and the second wiring groove 131 are connected to each other. The wiring grooves 131 are arranged at intervals on the wiring end side 19 of the frame body 1. Therefore, the longitudinal distance L1 between the bottom of the first assembly groove 11 and the outer surface of the frame body 1, the longitudinal distance L2 between the bottom of the second assembly groove 12 and the outer surface of the frame body 1, and the longitudinal distance L3 between the bottom of the third assembly groove 13 and the outer surface of the frame body 1 have the following relationship: L1>L2>L3; the high-voltage plate electrode 21, the insulating dielectric plate 22 and the grounding plate electrode 23 are respectively arranged in the first assembly groove 11, the second assembly groove 12 and the third assembly groove 13, and the dielectric barrier discharge unit and the frame body 1 are made into an integral structure through a limiting fixing structure, and the first lead 211 and the second lead 231 are respectively located in the first wiring groove 111 and the second wiring groove 131.

[0031] In the first embodiment, the limiting fixing structure is a bonding structure, that is, the high-voltage flat plate electrode 21, the insulating dielectric plate 22 and the grounding flat plate electrode 23 are respectively fixed in the first assembly groove 11, the second assembly groove 12 and the third assembly groove 13 by bonding on the surface and / or the circumference by glue, so that the dielectric barrier discharge unit is fixed in the accommodating cavity and forms a reliable integral structure with the frame body 1.

[0032] The plasma generator of this embodiment, since the dielectric barrier discharge unit is fixed by bonding in the pre-formed receiving groove of the frame body 1 to form an integral structure, the relative sides of the frame body 1 do not need to be packaged using insulating terminals as in the prior art. It is not only easy to assemble, but also allows the positive and negative ions generated by the dielectric barrier discharge unit ionizing the air to quickly overflow from the surface of the grounded plate electrode 23 to the surrounding air without hindrance, which is beneficial to improving the disinfection and purification performance of the plasma generator on the air.

[0033] Preferably, the surface of the grounding plate electrode 23 is not lower than the surface of the frame body 1, that is, the surface of the grounding plate electrode 23 is flush with the surface of the frame body 1, or even slightly higher than the surface of the frame body 1. This structure prevents the side of the frame body 1 from forming a concave shielding structure for the positive and negative ions generated by the dielectric barrier discharge unit ionizing the air, thereby facilitating the positive and negative ions to quickly overflow from the surface of the grounding plate electrode 23 to the surrounding air without obstruction.

[0034] Of course, the surface of the grounding plate electrode 23 may also be slightly lower than the surface of the frame body 1 , and it is preferred that the height of the surface of the frame body 1 above the surface of the grounding plate electrode 23 does not exceed 5 mm.

[0035] In addition, the two side edges of the frame body 1 adjacent to the wiring end side 19 are respectively set to be the first air guide side 10 of the inclined surface or the curved surface. The plasma generator is implemented in the air purification and disinfection device, and the plasma generator is installed at the air outlet of the air purification and disinfection device. The airflow of the air outlet flows through the surface of the plasma generator to quickly take away the positive and negative ions generated by the ionized air on the surface of the grounded plate electrode 23. Therefore, setting the two opposite side edges of the frame body 1 as the first air guide side 10 of the inclined surface or the curved surface is conducive to guiding the airflow of the air outlet to the surface of the plasma generator so that the positive and negative ions can be taken away faster, thereby improving the performance of the air purification and disinfection device.

[0036] Furthermore, a receiving groove can be respectively arranged on the two opposite surfaces of the frame body 1, and a dielectric barrier discharge unit can be respectively arranged in each receiving groove, so that a dielectric barrier discharge unit is respectively arranged on the two opposite sides of the frame body 1, and the two dielectric barrier discharge units are allowed to work at the same time, which can improve the sterilization and disinfection ability of the plasma generator on the air.

[0037] The plasma generator further includes a first terminal 31 and a second terminal 32 respectively connected to the first lead 211 and the second lead 231 by welding. The first terminal 31 and the second terminal 32 can be used to respectively connect the two first leads 211 and the two second leads 231 located on two opposite sides of the frame body 1 by welding, riveting or other electrical connection means, so as to facilitate the wiring operation when connecting to an external high-voltage power supply through the first terminal 31 and the second terminal 32.

[0038] The plasma generator also includes an insulating end cover 4 sleeved on the wiring end side 19, and the first terminal 31 and the second terminal 32 are partially exposed outside the insulating end cover 4. The insulating end cover 4 mainly serves to fix the first terminal 31, the second terminal 32 and the frame body 1 into a rigid whole with reliable structure. In addition, the two opposite sides of the insulating end cover 4 are configured as a second wind guide side 40 of an inclined surface or an arc surface.

[0039] Combination Figure 8-Figure 10 The second embodiment of the flat-plate plasma generator shown in the figure is different from the first embodiment in that the dielectric barrier discharge unit is fixed in the accommodating groove in a different limiting fixing structure. The limiting fixing structure of this embodiment includes: a plurality of limiting posts 132 are arranged at the bottom of the third assembly groove 13, a plurality of limiting holes 232 are arranged correspondingly around the grounding plate electrode 23, and each limiting post 132 is respectively limited in one of the limiting holes 232.

[0040] For example, the limiting column 132 is usually made of plastic. During assembly, the dielectric barrier discharge unit is assembled in the receiving groove, and each limiting hole 232 of the grounding plate electrode 23 in the third assembly groove 13 is respectively plugged into and corresponds to one of the limiting columns 132. Then, the limiting column 132 is hot-melted by an electric iron to form a limiting end having a size larger than the limiting hole 232. The limiting end is used to limit and fix the grounding plate electrode 23 in the third assembly groove 13 without loosening.

[0041] It is understandable that at least two opposite sides of the bottom of the third assembly groove 13 are respectively provided with limiting columns 132 , and correspondingly, two opposite sides of the grounding plate electrode 23 are respectively provided with limiting holes 232 .

[0042] The second embodiment uses the limiting pillar 132 of the third assembly groove 13 and the limiting hole 232 of the grounding plate electrode 23 to limit and fix the grounding plate electrode 23 in the third assembly groove 13, and the grounding plate electrode 23 presses the insulating dielectric plate 22 and the high-voltage plate electrode 21 in the receiving groove. At this time, the insulating dielectric plate 22 and the high-voltage plate electrode 21 can also be further reinforced by bonding.

[0043] Combination Figure 11-Figure 14The third embodiment of the flat-plate plasma generator is shown. The limiting and fixing structure includes: limiting edges 18 extending from two opposite sides of the frame body 1 toward the third assembly groove 13, and a slot 133 is formed between the limiting edge 18 and the bottom of the third assembly groove 13, so that the third assembly groove 13 is shown as a slot 133 on two opposite sides of the frame body 1, that is, the slot 133 is a part of the third assembly groove 13, and the slot 133 extends out of the wiring end side 19 of the frame body 1 to form a socket; two opposite sides of the grounding plate electrode 23 are inserted from the socket and limited in the slot 133, so that the grounding plate electrode 23 is limited and fixed in the third assembly groove 13.

[0044] The limiting edge 18 is in the shape of a strip or a dot, and the number is one or more, such as multiple strips or a continuous strip or multiple dots, which are not limited here. For example, the limiting edge 18 shown in the figure is a continuous strip.

[0045] During assembly, the high-voltage flat plate electrode 21 and the insulating dielectric plate 22 are respectively arranged in the first assembly groove 11 and the second assembly groove 12, and then the grounding flat plate electrode 23 is inserted into the third assembly groove 13 from the socket of the wiring end side 19, and the two sides of the grounding flat plate electrode 23 are limited by the slots 133 on the two opposite sides, so that the dielectric barrier discharge unit is fixedly assembled in the receiving groove of the frame body 1. Finally, the first lead 211 and the second lead 231 are respectively welded to the first terminal 31 and the second terminal 32, and then the insulating end cover 4 is sleeved on the wiring end side 19 to seal the grounding flat plate electrode 23, and the plasma generator is assembled.

[0046] The utility model also discloses an air purification and disinfection device, which has an air outlet. The above-mentioned flat-plate plasma generator is arranged at the air outlet. The positive and negative ions generated by air ionization by the plasma generator are used to purify and sterilize the air, and the air purification efficiency is high.

[0047] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A flat-plate plasma generator, comprising a frame body (1) and at least one dielectric barrier discharge unit, the dielectric barrier discharge unit comprising a high-voltage flat plate electrode (21) having a first lead (211), a grounded flat plate electrode (23) having a second lead (231), and an insulating dielectric plate (22) arranged between the high-voltage flat plate electrode (21) and the grounded flat plate electrode (23), characterized in that: The frame body (1) has a receiving groove on its surface, the receiving groove comprising a third assembly groove (13), a second assembly groove (12) and a first assembly groove (11) which are integrally formed in sequence in the depth direction from the outer surface of the frame body (1), the first assembly groove (11) and the third assembly groove (13) respectively comprising a first wiring groove (111) and a second wiring groove (131) extending from one end side of the frame body (1), the first wiring groove (111) and the second wiring groove (131) being arranged at intervals on the wiring end side (19) of the frame body (1); The high-voltage plate electrode (21), the insulating dielectric plate (22) and the grounding plate electrode (23) are respectively arranged in the first assembly groove (11), the second assembly groove (12) and the third assembly groove (13); and the dielectric barrier discharge unit and the frame body (1) are formed into an integral structure through a limiting fixing structure, and the first lead wire (211) and the second lead wire (231) are respectively located in the first wiring groove (111) and the second wiring groove (131).

2. The flat-plate plasma generator according to claim 1, characterized in that: A longitudinal distance L1 between the groove bottom of the first assembly groove (11) and the outer surface of the frame body (1), a longitudinal distance L2 between the groove bottom of the second assembly groove (12) and the outer surface of the frame body (1), and a longitudinal distance L3 between the groove bottom of the third assembly groove (13) and the outer surface of the frame body (1), wherein L1>L2>L3.

3. The flat-plate plasma generator according to claim 1, characterized in that: The surface of the grounding plate electrode (23) is not lower than the surface of the frame body (1), or the height of the surface of the frame body (1) above the surface of the grounding plate electrode (23) does not exceed 5 mm.

4. The flat-plate plasma generator according to claim 1, characterized in that: The two side edges of the frame body (1) adjacent to the wiring end side (19) are respectively arranged to be first wind guide sides (10) that are inclined or curved.

5. The flat-plate plasma generator according to claim 1, characterized in that: An accommodating groove is respectively arranged on two opposite surfaces of the frame body (1), and a dielectric barrier discharge unit is respectively arranged in each accommodating groove.

6. The flat-plate plasma generator according to claim 1, characterized in that: It also includes a first connection terminal (31) and a second connection terminal (32) which are respectively welded to the first lead wire (211) and the second lead wire (231).

7. The flat-plate plasma generator according to claim 1, characterized in that: It also includes an insulating end cover (4) sleeved on the wiring end side (19), and the first wiring terminal (31) and the second wiring terminal (32) are partially exposed outside the insulating end cover (4).

8. The flat-plate plasma generator according to any one of claims 1 to 7, characterized in that: The limiting fixing structure is a bonding structure, and the surfaces and / or peripheral sides of the high-voltage flat plate electrode (21), the insulating dielectric plate (22) and the grounding flat plate electrode (23) are respectively bonded and fixed in the first assembly groove (11), the second assembly groove (12) and the third assembly groove (13).

9. The flat-plate plasma generator according to any one of claims 1 to 7, characterized in that: The limiting fixing structure comprises: a plurality of limiting columns (132) are arranged at the bottom of the third assembly groove (13), a plurality of limiting holes (232) are correspondingly arranged around the grounding plate electrode (23), and each limiting column (132) is respectively limitedly arranged in one of the limiting holes (232).

10. The flat-plate plasma generator according to any one of claims 1 to 7, characterized in that: The limiting fixing structure comprises: limiting edges (18) extending from two opposite sides of the frame body (1) toward the third assembly groove (13), a slot (133) formed between the limiting edges (18) and the bottom of the third assembly groove (13), the slot (133) extending from the wiring end side (19) of the frame body (1) to form two opposite sides of the socket grounding plate electrode (23) inserted from the socket and limited in the slot (133).

Images