Plasma generator with flat dielectric barrier discharge structure

Abstract

The present invention discloses a plasma generator with a flat dielectric barrier discharge structure, comprising a dielectric barrier discharge unit and two plastic card parts; the dielectric barrier discharge unit comprises an inner electrode plate, two dielectric plates and two outer electrode plates, the outer electrode plates each comprising an outer electrode plate body and a folded edge formed by bending from two long sides of the outer electrode plate body in the same direction, a first buckle hole is provided at both ends of each folded edge, the folded edges of the two outer electrode plates located on the same long side are overlapped and the positions of the first buckle holes at the corresponding ends coincide; the plastic card part comprises a card seat, one end of the card seat is provided with a snap-on groove, and two opposite groove walls of the snap-on groove are provided with first buckles; the two short sides of the dielectric barrier discharge unit are respectively inserted into the snap-on grooves of the two plastic cards, and the first buckles are respectively snap-connected with the first buckle holes at the corresponding positions. The plasma generator of the present invention has a better sterilization and disinfection effect.

Description

Technical Field

[0001] The invention relates to the field of ion generators, in particular to a plasma generator with a flat-plate dielectric barrier discharge structure. Background Art

[0002] This section only provides background information related to the present application to help those skilled in the art understand the present application more thoroughly and accurately, and it is not necessarily prior art.

[0003] The common flat-plate plasma generator currently on the market uses plastic parts to cover and fix the four end surfaces of the flat-plate dielectric barrier discharge structure, and the plastic parts on the four end surfaces wrap a part of the dielectric barrier discharge structure for position fixing.

[0004] This structure has the following defects: since each plastic part has to wrap a part of the outer electrode to be limited and fixed, and the plastic part has a certain thickness, the surface of the plastic part will be higher than the surface of the outer electrode, so that the surface of the outer electrode is located in a circumferential surrounding depression formed by the plastic parts on the four sides. Therefore, the positive and negative ions generated during operation are easy to gather on the surface of the outer electrode and are not easy to dissipate, which not only makes it easy for the gathered positive and negative ions to form ozone, but also causes less positive and negative ions to be dispersed into the air, resulting in poor sterilization and disinfection effect. At the same time, the plastic parts will also accumulate charges to form an electrostatic field, which will cause potential damage to other electrical devices. Summary of the invention

[0005] In order to solve the defects of the prior art, the purpose of the present invention is to provide a plasma generator with a flat-plate dielectric barrier discharge structure, which generates positive and negative ions that are easy to dissipate and has a better sterilization and disinfection effect.

[0006] The present invention provides a plasma generator with a flat-plate dielectric barrier discharge structure, comprising a dielectric barrier discharge unit and two plastic card parts;

[0007] The dielectric barrier discharge unit comprises an inner electrode plate, two dielectric plates respectively located on two sides of the inner electrode plate, and two outer electrode plates, each of the outer electrode plates comprises a flat outer electrode plate body and a folded edge formed by bending from two long sides of the outer electrode plate body in the same direction, a first buckle hole is arranged at both ends of each folded edge, the two outer electrode plates are arranged oppositely on the outer sides of the two dielectric plates, the folded edges of the two outer electrode plates located on the same long side are overlapped, and the positions of the first buckle holes at the corresponding ends coincide;

[0008] The plastic card comprises a card seat, one end of which is provided with a card slot, the width of which matches the width of the short side of the outer electrode plate, and first buckles are provided on two opposite slot walls of the card slot;

[0009] The two plastic clips are respectively clipped on the two short sides of the dielectric barrier discharge unit, the two short sides of the dielectric barrier discharge unit are respectively inserted into the clip grooves of the two plastic cards, and the first clips are respectively clipped and connected with the first buckle holes at corresponding positions.

[0010] In a preferred embodiment, a limiting rib is provided in the clamping groove, and when the short side of the dielectric barrier discharge unit is clamped in the clamping groove of the clamping seat, the limiting rib abuts against the short side of the dielectric barrier discharge unit.

[0011] In a preferred embodiment, the plastic card further comprises a cover plate detachably connected to the card base, and when the cover plate is mounted on the card base, the cover plate is at least partially pressed against the short side of the dielectric barrier discharge unit.

[0012] In a preferred embodiment, a second buckle is provided on the outer side of the base, the cover plate has a downwardly extending fixed arm, and a second buckle hole is provided on the fixed arm. When the cover plate is set on the snap-fit ​​groove, the second buckle is buckled and connected with the second buckle hole.

[0013] In a preferred embodiment, the end of the folded edge extends outwardly to an extended end relative to the short side of the outer electrode plate body, and the first buckle hole is arranged on the extended end; or / and, the groove wall of the snap-fit ​​groove extends into an extended arm, and the first buckle is arranged on the extended arm.

[0014] In a preferred embodiment, the outer electrode plate is grounded, and the inner electrode plate is electrically connected to a high voltage power source.

[0015] In a preferred embodiment, a first terminal is provided on a short side of the inner electrode plate, and a second terminal is provided on a corresponding short side of one of the outer electrode plates.

[0016] In a preferred embodiment, one of the card seats has a first limiting groove and a second limiting groove that are relatively independently arranged at the other end relative to the card connection groove, the first terminal is arranged in the first limiting groove, and the second terminal is arranged in the second limiting groove.

[0017] In a preferred embodiment, the plasma generator of the flat-plate dielectric barrier discharge structure also includes a first power line and a second power line electrically connected to the first terminal and the second terminal respectively, the first power line includes a first connecting terminal fixedly connected to the first terminal and a first wire fixedly connected to the first connecting terminal, and the second power line includes a second connecting terminal fixedly connected to the second terminal and a second wire fixedly connected to the second connecting terminal.

[0018] In a preferred embodiment, the plasma generator of the flat-plate dielectric barrier discharge structure also includes two silicone protective covers, one of which is covered at the connection between the first terminal and the first connecting terminal, and the other is covered at the connection between the second terminal and the second connecting terminal, and one end of the two silicone protective covers is respectively limited in the first limiting groove and the second limiting groove 2.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention improves the structure of a flat dielectric barrier discharge unit, by setting folds leading to bends on two relatively long sides of an outer electrode plate, overlapping the folds of the corresponding long sides when the two outer electrode plates are relatively set, and using two plastic clips to clamp and fix the two short sides of the flat dielectric barrier discharge unit with the folds, abandoning the structure in the prior art that all four sides of the dielectric barrier discharge unit need to be fixed with plastic clips, not only reducing the use of plastic clips, reducing costs and simplifying the assembly of the plasma generator, but also preventing the surface of the outer electrode plate and the plastic clip from forming a circumferentially surrounded concave state, which is conducive to making the positive and negative ions generated on the surface of the outer electrode plate not easy to gather but quickly dissipate into the surrounding air, thereby helping to improve the sterilization and disinfection effect of the plasma generator. In addition, by grounding the outer electrode plate, a large amount of charge will not be accumulated on the plastic clip, which is conducive to improving the service life and safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the exploded structure of the first embodiment of the plasma generator.

[0022] Figure 2 It is a schematic diagram of the decomposed structure of the dielectric barrier discharge unit.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of a dielectric barrier discharge unit.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the first embodiment of the plasma generator.

[0025] Figure 5 Schematic diagram of the exploded structure of the second embodiment of the plasma generator.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the second embodiment of the plasma generator. DETAILED DESCRIPTION

[0027] 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.

[0028] First embodiment

[0029] Combination Figure 1-Figure 4 As shown, the present invention provides a plasma generator with a flat-plate dielectric barrier discharge structure (also referred to as a "plasma generator"), including a dielectric barrier discharge unit and two plastic clamps clamped at two opposite short sides of the dielectric barrier discharge unit, the two opposite short sides of the dielectric barrier discharge unit are clamped by the plastic clamps, and the plastic clamps play a fixing and insulating role.

[0030] Among them, see Figure 2-Figure 3 As shown, the dielectric barrier discharge unit includes: an inner electrode plate 1, which is a stainless steel plate or a copper plate and is provided with meshes or grids in a geometric shape such as a circle, a square or a triangle; two dielectric plates 2 respectively located on the two sides of the inner electrode plate 1, and the dielectric plates 2 are quartz glass plates or ceramic plates; two outer electrode plates 3, each of which includes a flat outer electrode plate body 31 and a folded edge 32 formed by bending two long sides of the outer electrode plate body 31 in the same direction, so that the cross section of the outer electrode plate 3 is U-shaped, and first buckle holes 33 are provided at both ends of each folded edge; the two outer electrode plates 3 are relatively arranged on the outer sides of the two dielectric plates 2, and the folded edges 32 of the two outer electrode plates 3 located on the same long side are overlapped so that the positions of the first buckle holes 33 at the corresponding ends coincide.

[0031] The plastic card includes a card seat 4, one end of which is provided with a card slot 40, the width of which matches the width of the short side of the outer electrode plate 3, and first buckles 42 are provided on both opposite groove walls of the card slot 40. When the short side of the dielectric barrier discharge unit is inserted into the card slot 40 of the card seat 4, the first buckles 42 located on the two opposite groove walls of the card slot 40 are respectively inserted into the first buckle holes 33 of the outer electrode plate 3, thereby fixing the two oppositely arranged outer electrode plates 3, and by respectively clamping the two plastic card members on the two short sides of the dielectric barrier discharge unit, the two ends of the two dielectric plates 2 are fixed, thereby clamping and fixing the inner electrode plate 1 between the two outer electrode plates 3.

[0032] The outer electrode plate 3 is grounded, and the inner electrode plate 1 is electrically connected to the high-voltage power supply. When the plasma generator is electrically connected to the high-voltage power supply, a uniform high-voltage electric field is formed between each outer electrode plate 3 and the inner electrode plate 1. The dielectric plate 2 is in the high-voltage electric field to form a dielectric barrier discharge structure, so that the air is ionized and broken down to produce positive and negative ions. The released positive and negative ions achieve sterilization and environmental purification functions. By grounding the outer electrode plate 3, a large amount of charge will not accumulate on the plastic card.

[0033] The present invention improves the structure of a flat dielectric barrier discharge unit. By arranging folded edges 32 leading to bending on two relatively long sides of an outer electrode plate 3, the folded edges 32 of the corresponding long sides are overlapped when the two outer electrode plates 3 are arranged relatively to each other. The folded edges 32 can be used to block the gaps existing on the long sides between the two dielectric plates 2 and the inner electrode plate 1, so as to prevent external moisture from entering the gaps and causing the plasma generator to fail to work or be damaged, thereby improving the reliability of the plasma generator. At the same time, the folded edges 32 of the corresponding long sides of the two outer electrode plates 3 can be overlapped so that only two plastic clips are needed to respectively clamp and fix the two short sides of the flat dielectric barrier discharge unit. It is no longer necessary to arrange plastic clips on all sides of the outer electrode plate 3 as in the prior art, so that the surface of the outer electrode plate 3 and the plastic clip will no longer form a circumferentially surrounded concave state, which is conducive to preventing the positive and negative ions generated on the surface of the outer electrode plate 3 from being easily gathered but quickly dissipated into the surrounding air, thereby facilitating improving the sterilization and disinfection effect of the plasma generator.

[0034] The outer electrode plate 3 adopts an integrally formed structure, and the folded edge 32 can be directly bent from the two long sides of the outer electrode plate 3. The folded edge 32 of the outer electrode plate 3 can be realized by using existing mature processes, which can ensure that the outer electrode plate body 31 is a flat plate with good flatness, so that the internal and external electric fields between each outer electrode plate 3 and the inner electrode plate 1 are uniform, forming a uniform plasma generator.

[0035] In addition, in order to improve the reliability of the clamping connection between the clamping base 4 and the short side of the dielectric barrier discharge unit, a limiting rib 41 is provided in the clamping groove 40. When the short side of the dielectric barrier discharge unit is clamped in the clamping groove 40 of the clamping base 4, the limiting rib 41 abuts against the short side of the dielectric barrier discharge unit. The limiting rib 41 limits the short side of the dielectric barrier discharge unit to move horizontally, so that the clamping base 4 is buckled into the first buckle hole 33 through the first buckle 42 to maintain the clamping connection and fixation with the dielectric barrier discharge unit.

[0036] In addition, the plastic card also includes a cover plate 5 detachably connected to the card base 4. When the cover plate 5 is installed on the card base 4, the cover plate 5 is at least partially pressed against the short side of the dielectric barrier discharge unit, thereby limiting the dielectric barrier discharge unit from moving longitudinally out of the card slot 40, which is beneficial to further improve the card connection reliability between the card base 4 and the short side of the dielectric barrier discharge unit.

[0037] For example, a second buckle 53 is provided on the outer side of the card base 4, and the cover plate 5 has a downwardly extending fixed arm 51, and a second buckle hole 52 is provided on the fixed arm 51. When the cover plate 5 is set on the card slot 40, the second buckle 53 is buckled into the second buckle hole 52 so that the cover plate 5 is fixedly installed on the card base 4.

[0038] The end of the folded edge 32 extends outwardly to form an extension end 34 relative to the short side of the outer electrode plate body 31, and the first buckle hole 33 is arranged on the extension end 34; or / and, the groove wall of the clamping groove 40 extends a protruding arm 49, and the first buckle 42 is arranged on the protruding arm 49. Such a structure can not only realize the clamping of the plastic clamp with the short side of the dielectric barrier discharge unit, but also reduce the covering area of ​​the plastic clamp and the outer electrode plate body 31, and reduce the probability that the positive and negative ions generated on the surface of the outer electrode plate body 31 are blocked by the plastic clamp and cannot be emitted into the air, so that the positive and negative ions generated by the plasma generator can be emitted into the air as little as possible without being affected by the plastic clamp, which is conducive to improving the sterilization efficiency of the plasma generator.

[0039] A first terminal 11 is provided on a short side of the inner electrode plate 1, and a second terminal 39 is provided on a corresponding short side of one of the outer electrode plates 3. One of the other ends of the card holder 4 relative to the card slot 40 has a relatively independent first limiting groove 451 and a second limiting groove 452, the first terminal 11 is arranged in the first limiting groove 451, and the second terminal 39 is arranged in the second limiting groove 452. The specifications of the first terminal 11 are different from those of the second terminal 39, for example, the widths of the two are different. This is to facilitate the connection of the plasma generator with the high voltage power supply to prevent wrong connection and improve the safety of use.

[0040] Second embodiment

[0041] See Figure 5 and Figure 6 The second embodiment is based on the first embodiment and further includes a first power line and a second power line electrically connected to the first terminal 11 and the second terminal 39 respectively, the first power line includes a first connection terminal 61 fixedly connected to the first terminal 11 and a first wire 63 fixedly connected to the first connection terminal 61, and the second power line includes a second connection terminal 62 fixedly connected to the second terminal 39 and a second wire 64 fixedly connected to the second connection terminal 62.

[0042] It also includes two silicone protective covers 8, one of which is covered at the connection between the first terminal 11 and the first connection terminal 61, and the other is covered at the connection between the second terminal 39 and the second connection terminal 62. One end of the two silicone protective covers 8 is respectively limited in the first limiting groove 451 and the second limiting groove 452. During installation, the first terminal 11 and the first connection terminal 61 are respectively inserted from the two ends of one of the silicone protective covers 8 and fixedly connected inside the silicone protective cover 8, and the second terminal 39 and the second connection terminal 62 are respectively inserted from the two ends of the other silicone protective cover 8 and fixedly connected inside the silicone protective cover 8. The two silicone protective covers 8 play a role of limiting and isolating, so as to prevent the first terminal 11 and the second terminal 39 from being exposed to electricity, thereby ensuring safe use.

[0043] 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 plasma generator with a flat-plate dielectric barrier discharge structure, characterized in that: It includes a dielectric barrier discharge unit and two plastic card parts; The dielectric barrier discharge unit comprises an inner electrode plate, two dielectric plates respectively located on two sides of the inner electrode plate, and two outer electrode plates, each of the outer electrode plates comprises a flat outer electrode plate body and a folded edge formed by bending from two long sides of the outer electrode plate body in the same direction, a first buckle hole is arranged at both ends of each folded edge, the two outer electrode plates are arranged oppositely on the outer sides of the two dielectric plates, the folded edges of the two outer electrode plates located on the same long side are overlapped, and the positions of the first buckle holes at the corresponding ends coincide; The plastic card comprises a card seat, one end of which is provided with a card slot, the width of which matches the width of the short side of the outer electrode plate, and first buckles are provided on two opposite slot walls of the card slot; The two plastic clips are respectively clipped to the two short sides of the dielectric barrier discharge unit, the two short sides of the dielectric barrier discharge unit are respectively inserted into the clipping grooves of the two plastic cards, and the first clips are respectively clipped to the first buckle holes at the corresponding positions; A first terminal is provided on one short side of the inner electrode plate, and a second terminal is provided on a corresponding short side of one of the outer electrode plates; The outer electrode plate is grounded, and the inner electrode plate is electrically connected to a high voltage power supply.

2. The plasma generator with a flat-plate dielectric barrier discharge structure according to claim 1, characterized in that: A limiting rib is arranged in the clamping groove, and when the short side of the dielectric barrier discharge unit is clamped in the clamping groove of the clamping seat, the limiting rib abuts against the short side of the dielectric barrier discharge unit.

3. The plasma generator with a flat-plate dielectric barrier discharge structure according to claim 1, characterized in that: The plastic card also includes a cover plate detachably connected to the card base. When the cover plate is installed on the card base, at least a portion of the cover plate is pressed on the short side of the dielectric barrier discharge unit.

4. The plasma generator with a planar dielectric barrier discharge structure according to claim 3, characterized in that: A second buckle is provided on the outer side of the card seat, and the cover plate has a fixing arm extending downward, and a second buckle hole is provided on the fixing arm. When the cover plate is arranged on the card slot, the second buckle is buckled and connected with the second buckle hole.

5. The plasma generator with a planar dielectric barrier discharge structure according to claim 1, characterized in that: The end of the folded edge extends outwardly to form an extended end relative to the short side of the outer electrode plate body, and the first buckle hole is arranged on the extended end; or / and, the groove wall of the clamping groove extends into a protruding arm, and the first buckle is arranged on the protruding arm.

6. The plasma generator with a planar dielectric barrier discharge structure according to claim 1, characterized in that: One of the card seats has a first limiting groove and a second limiting groove that are relatively independently arranged at the other end relative to the card connection groove. The first binding post is arranged in the first limiting groove, and the second binding post is arranged in the second limiting groove.

7. The plasma generator with a planar dielectric barrier discharge structure according to claim 6, characterized in that: It also includes a first power line and a second power line electrically connected to the first terminal and the second terminal respectively. The first power line includes a first connection terminal fixedly connected to the first terminal and a first wire fixedly connected to the first connection terminal. The second power line includes a second connection terminal fixedly connected to the second terminal and a second wire fixedly connected to the second connection terminal.

8. The plasma generator with a planar dielectric barrier discharge structure according to claim 7, characterized in that: It also includes two silicone protective covers, one of which covers the connection between the first terminal and the first connecting terminal, and the other covers the connection between the second terminal and the second connecting terminal, and one end of the two silicone protective covers is respectively limited in the first limiting groove and the second limiting groove.

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