CN214592101U - Plasma generator and air sterilizer with same - Google Patents

Abstract

The utility model provides a plasma generator and have its air disinfector, plasma generator includes the bottom plate be provided with a plurality of plasma tube subassembly and a plurality of transformer on the bottom plate, the plasma tube subassembly passes through the fixed setting of electrode holder on the bottom plate, the transformer with the plasma tube subassembly electricity is connected, the transformer be used for to the plasma tube subassembly provides voltage, makes the plasma tube subassembly produces the plasma that the outside is discharged. The utility model discloses a setting in plasma tube and ventilation hole plays the effect of vortex to the air current for the air current distributes more evenly, thereby obtains better bactericidal effect, through the setting of electrode holder dual insulation structure, has promoted plasma generator's security through the setting of solidus portion, reduces the air current to the influence of connecting wire, the utility model discloses simple structure is light and handy, and convenient to use has improved plasma generator's sterilization efficiency and energy availability factor greatly.

Description

Plasma generator and air sterilizer with same

Technical Field

The utility model relates to an air purification field particularly, relates to a plasma generator and have its air disinfector.

Background

Airborne pollutants that threaten health can be subdivided into three groups; (a) airborne pathogens, which include any organism that causes disease that is transmitted through the air to the entire environment; (b) airborne allergens comprising any substance that causes an allergic reaction when ingested, inhaled or contacted; (c) contains any Volatile Organic Compounds (VOCs) in the form of fine particles suspended in the air, the last category including many cleaning chemicals, hair sprays, various types of primers and fuels, such as gasoline and kerosene, and other household, cosmetic products, newly manufactured fabrics, etc., which also contribute to the VOC in the room air when it is expelled over time or leaks in gaseous form.

Airborne contaminants accumulate in the indoor environment in large quantities, resulting in the possibility of the air we breathe being contaminated, and given that humans spend an average of about 90% of their time in an indoor environment, it is recognised that removal of contaminants from indoor air is important in reducing allergies and preventing the spread of infections, such as sick building syndrome.

Along with social development and scientific and technical progress, the quality of life of people is continuously improved, and meanwhile, the requirements of people on living environment are increased day by day, so that the development of various air purification and disinfection products is promoted. In recent years, the plasma disinfection industry in China has been rapidly developed, and a large number of plasma air disinfection devices are appeared in the field of air disinfection. For example, in the chinese utility model patent with patent number 200320109397.5, a plasma air sterilization purifier is disclosed, including casing, fan, air cleaner, plasma reactor, photocatalysis sterilization filter, anion generation district, its air cleaner adopts activated carbon filter, is equipped with the actinic medium dope layer on the filtering layer of photocatalysis sterilization filter, the edge is equipped with the light source that can shine the actinic medium dope layer, simultaneously, this scheme has still adopted the filamentous plasma reactor and the cusp plasma reactor that chinese utility model patent disclosed that patent number is 200320109396.0 and 200320109398.X respectively. Although the plasma reactor is adopted, the plasma reactor cannot work under high pressure and cannot generate high-concentration plasma, the sterilization effect is not as good as that of equipment which can generate high-concentration plasma when the plasma reactor works under high pressure, secondly, the plasma air sterilization purifier disclosed by the patent cannot disturb air which enters the plasma reactor to be sterilized to be diffused to the periphery of an electrode wire to the maximum extent to achieve the purpose of sufficient sterilization no matter the plasma reactor is a wire-shaped plasma reactor or a tooth-shaped plasma reactor, and in addition, a photocatalysis sterilization filter of the plasma air sterilization purifier disclosed by the patent adopts photochemical catalysis, so the cost is higher.

In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides an among the prior art, plasma generator structure is not good, can't reach abundant sterile purpose, and the cost is higher.

The utility model discloses a plasma generator, plasma generator includes the bottom plate be provided with a plurality of plasma tube subassembly and a plurality of transformer on the bottom plate, the plasma tube subassembly passes through the fixed setting of electrode support on the bottom plate, the transformer with the plasma tube subassembly electricity is connected, the transformer be used for to the plasma tube subassembly provides voltage, makes the plasma tube subassembly produces the plasma that the outside is discharged.

The outer side referred to herein is the side where the periphery of the plasma tube assembly is located in the conventional sense, and the arrangement makes the plasma tube assembly and the bottom plate have a certain distance therebetween, which is convenient for air circulation, and the plasma discharged outside the plasma tube assembly can obtain a larger sterilizing area, thereby obtaining a better sterilizing effect.

Furthermore, a vent hole is arranged on the bottom plate, and the vent hole corresponds to the plasma tube assembly.

When the plasma tube assembly works, air is guided to the plasma tube assembly from the vent hole, partial air is ionized at high pressure to generate plasma outside the plasma tube assembly, the plasma sterilizes the residual air, the arrangement enables air flow to pass through the upper side and the lower side of the plasma tube assembly, when the air flow passes through the plasma tube assembly, the arrangement of the plasma tube generates turbulence to the air flow, so that the air flow is distributed more uniformly, a better disinfection effect can be obtained, preferably, a first electrode and a second electrode are arranged in the plasma tube assembly, discharge parts are respectively arranged on the first electrode and the second electrode, the vent hole is arranged relative to the discharge parts, the length of the vent hole is matched with the discharge parts, the arrangement enables the air flow to directly flow to the discharge parts, and the air flow is ensured to be fully contacted with the discharge parts outside the plasma tube assembly, thereby achieving a better disinfection effect.

Furthermore, the number of the ventilation holes is equal to that of the plasma tube assemblies, and the ventilation holes are arranged in a one-to-one correspondence manner.

The arrangement enables adjacent vent holes to be spaced, and wiring of the plasma tube assembly is facilitated, so that the condition that connecting wires are influenced by airflow to cause the plasma generator to break down is avoided.

Furthermore, a plurality of line fixing parts are further arranged on the bottom plate and used for limiting the connecting lines on the bottom plate.

The plasma generator is used for preventing air flow from blowing the connecting wire to cause the plasma generator to break down, and preferably, the wire fixing part is of an arc-shaped structure formed by upward stamping from the bottom plate, so that the connecting wire is prevented from being abraded while the connecting wire is ensured to pass through.

Furthermore, at least one line fixing part is arranged on the bottom plate between two adjacent vent holes.

The arrangement can limit the connecting line of one end of the plasma tube assembly, which is far away from the transformer, on the bottom plate, so that the plasma tube assembly is prevented from being influenced by airflow when the plasma generator works.

Furthermore, the electrode support comprises an insulating column, the upper end of the insulating column is connected with the first electric connecting piece or the second electric connecting piece through a fastening piece, and the other end of the insulating column is connected with the bottom plate.

The arrangement helps to realize insulation of the electrode support, so that safety of a product is ensured, the insulating pad is used for realizing double insulation of the electrode support, a better insulating effect is obtained, and safety performance of the plasma generator is improved.

Further, the plasma tube assembly includes a first electrode, a second electrode, and a dielectric member, the first electrode and the second electrode being opposite positive and negative electrodes, the dielectric member being disposed between the first electrode and the second electrode.

The dielectric part is used for realizing dielectric barrier discharge between the first electrode and the second electrode, the dielectric barrier discharge refers to discharge between the two electrodes separated by an insulating dielectric barrier layer, and specifically, air is ionized by high-voltage discharge between the first electrode and the second electrode, so that plasma can be rapidly generated for disinfection.

Further, the dielectric member is a hollow plasma tube having one open end and the other closed end, the discharge portion of the first electrode is disposed on an outer circumferential surface of the plasma tube, the discharge portion of the second electrode is disposed on an inner circumferential surface of the plasma tube, and the discharge portion of the first electrode is disposed corresponding to the discharge portion of the second electrode.

This setting can enlarge the area of first electrode discharge portion and second electrode discharge portion, and then enlarge the area of contact of air and discharge portion, realize the even discharge on the plasma tube global to ionization produces more plasmas, improves plasma concentration, promotes the virus killing effect.

Further, the discharge portion of the first electrode is an outer mesh, the outer mesh is sleeved and connected to the outside of the plasma tube, the discharge portion of the second electrode is an inner mesh, and the inner mesh is arranged on the inner circumferential surface of the plasma tube.

The contact area between the outer net and the inner net can be enlarged better, and enough space is ensured to form creeping discharge, so that a better disinfection effect is obtained.

The utility model also discloses an air disinfector, the air disinfector includes as above a plasma generator.

The air sterilizer has the same advantages as the plasma generator described above with respect to the prior art, and thus, the description thereof is omitted.

Compared with the prior art, the plasma generator and the air sterilizer with the same have the following advantages:

1) through the arrangement of the plasma tube, the effect of turbulent flow is achieved on the air flow, so that the air flow is distributed more uniformly, and a better sterilization effect is obtained;

2) through the arrangement of the inner net and the outer net, the contact area of the discharge part and the air is enlarged, enough space is ensured to form creeping discharge, the plasma concentration is increased, and the sterilization effect is improved;

3) the use safety of the plasma generator is improved by the arrangement of the double-insulation structure of the electrode bracket;

4) through the arrangement of the air vents, a plurality of plasma tube assemblies can be arranged in parallel, air flow circulates through the upper part and the lower part of the plasma tube, and a uniform antivirus environment is formed through the turbulent flow effect of the plasma tube assemblies, so that a better antivirus effect is obtained;

5) through the arrangement of the wire fixing part, the influence of air flow on the connecting wire is avoided, and the failure rate of the plasma generator is reduced;

6) the utility model discloses simple structure is light and handy, and convenient to use has improved plasma generator's sterilization efficiency and energy availability factor greatly.

Drawings

Fig. 1 is a schematic view of an overall structure of a plasma generator according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a plasma tube assembly according to an embodiment of the present invention;

fig. 3 is a schematic view of another view angle of a plasma tube assembly according to an embodiment of the present invention;

fig. 4 is an exploded view of a plasma tube assembly according to an embodiment of the present invention;

fig. 5 is an exploded view of a plasma tube assembly according to an embodiment of the present invention from another perspective;

FIG. 6 is an enlarged view of a portion A of FIG. 1;

fig. 7 is a schematic view of a bottom plate structure according to an embodiment of the present invention.

Description of reference numerals:

1. a base plate; 11. a vent hole; 12. a wire fixing part; 13. a ground part; 2. a transformer; 3. a wire distributing piece;

31. a wire inlet part; 32. a first outlet member; 33. a second outlet member; 4. an electrode holder; 41. an insulating column;

42. an insulating pad; 43. a fastener; 5. a transformer support; 6. a plasma tube assembly; 7. a plasma tube;

71. an open end; 72. sealing the end; 8. a first electrode; 81. a first body; 82. a first limit piece;

83. a first connecting member; 84. an outer net; 85. a first electric connection piece; 9. a second electrode; 91. a second body;

92. a second limiting member; 93. a second connecting member; 94. an inner net; 95. a second electric connection piece; 96. and a through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The following describes a plasma generator and an air sterilizer having the same according to embodiments of the present invention with reference to the accompanying drawings.

Example 1

The present embodiment provides a plasma generator, as shown in fig. 1, in the present invention, the plasma generator includes a bottom plate 1, a plurality of plasma tube assemblies 6 and a plurality of transformers 2 are disposed on the bottom plate 1, a plurality of primary windings of the transformers 2 are connected in series, a vent hole 11 is disposed on the bottom plate 1, the vent hole 11 is disposed corresponding to the plasma tube assemblies 6, the transformers 2 are electrically connected to the plasma tube assemblies 6, the plasma tube assemblies 6 ionize air to generate plasma, the plasma is used for sterilization, in the present embodiment, as shown in fig. 7, the vent hole 11 may be 1 or several, when in operation, air is guided to the plasma tube assemblies 6 from the vent hole 11, part of air is ionized by high pressure to generate plasma, the plasma sterilizes the remaining air, preferably, the number of the vent holes 11 is equal to that of the plasma tube assemblies 6, the vent holes and the plasma tube assemblies are arranged in a one-to-one correspondence, the arrangement can be used for spacing a bottom plate with a certain width between the adjacent vent holes 11, so that the wiring of the electrode at one end of the plasma tube assembly 6 far away from the transformer 2 is convenient, a plurality of primary windings of the transformer 2 are connected in series to multiply the voltage, thereby obtaining ultra-high voltage, being beneficial to the generation of plasma and improving the sterilization efficiency, preferably, the model power of a plurality of transformers 2 is the same, this arrangement can effectively prevent the problem that the transformer 2 is easily damaged due to the uneven distribution of the primary voltage, thereby enabling the plasma generator to obtain a stable service life, preferably, a plurality of the plasma tube assemblies 6 are arranged at equal intervals, the arrangement helps to form a uniform and stable plasma field, thereby achieving a better sterilizing effect.

Specifically, as shown in fig. 2 to 5, the plasma tube assembly 6 includes a first electrode 8, a second electrode 9, and a dielectric member, the first electrode 8 and the second electrode 9 are respectively connected to an anode and a cathode of a secondary winding of the transformer 2, the dielectric member is disposed between the first electrode 8 and the second electrode 9, and is used for implementing dielectric barrier discharge between the first electrode 8 and the second electrode 9, the dielectric barrier discharge is discharge between two electrodes separated by an insulating dielectric barrier layer, in this embodiment, air is ionized by using high-voltage discharge between the first electrode 8 and the second electrode 9, so that plasma can be rapidly generated for sterilization.

In this embodiment, the dielectric member is a plasma tube 7, the plasma tube 7 has a hollow structure with one open end and one closed end, the first electrode 8 and the second electrode 9 are respectively disposed at two ends of the plasma tube 7, a discharge portion is disposed on each of the first electrode 8 and the second electrode 9, the discharge portion of the first electrode 8 is disposed on an outer circumferential surface of the plasma tube 7, the discharge portion of the second electrode 9 is disposed on an inner circumferential surface of the plasma tube 7, the discharge portion of the first electrode 8 is disposed corresponding to the discharge portion of the second electrode 9, and this arrangement can enlarge the areas of the discharge portions of the first electrode 8 and the second electrode 9, enlarge the contact area between air and the discharge portions, achieve uniform discharge on the circumferential surface of the plasma tube 7, so as to ionize and generate more plasma, and improve plasma concentration, the sterilization effect is improved, specifically, plasma tube 7 can be in various shapes, preferably cylindrical, and plasma tube 7 is made of insulating materials, such as glass, ceramic or quartz, in this embodiment, the wall thickness of plasma tube 7 is 2-7 mm, preferably, the thickness of plasma tube 7 is 3mm, and when 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, better discharge can be obtained, so that a good sterilization effect is realized.

Specifically, the first electrode 8 includes a first main body 81, a first limiting member 82 is disposed on the first main body 81, the first limiting member 82 is configured to limit the first main body 81 at the sealing end 72 of the plasma tube 7, the discharge portion of the first electrode 8 is an outer net 84, the outer net 84 is fixedly connected to the first main body 81 through a first connecting member 83, preferably, the first connecting member 83 may also have a certain limiting effect, the first limiting member 82 is a plurality of lath-shaped structures extending toward the plasma tube 7, the number of lath-shaped structures is at least two, the lath-shaped structures are attached to the outer surface of the plasma tube 7, the first electrode 8 is disposed at one end of the plasma tube 7, in this embodiment, there are two lath-shaped structures, and the first connecting member 83 is disposed at an interval with the two lath-shaped structures, the three parts jointly complete the attachment of the first electrode 8 and the plasma tube 7, and the arrangement makes the first connecting piece 83 have two functions, saves the arrangement of a lath-shaped structure, and reduces the production cost.

In this embodiment, the second electrode 9 includes a second main body 91, a second limiting member 92 is disposed on the second main body 91, the second limiting member 92 is used for limiting the second main body 91 at the opening end 71 of the plasma tube 7, the discharge portion of the second electrode 9 is an internal web 94, the internal web 94 is fixedly connected with the second main body 91 through a second connecting member 93, the second main body 91 is further provided with a through hole 96, the through hole 96 is used for air intake of the plasma tube 7, preferably, the second connecting member 93 can also have a certain limiting effect, and the specific structure is similar to the first limiting member 82 and the first connecting member 83, except that the second limiting member 92 and the second connecting member 93 are attached to the inner surface of the plasma tube 7, and it should be noted that the diameter of the through hole 96 is 6-12mm, preferably, the diameter of the through hole 96 is 8-10mm, and more preferably, the diameter of the through hole 96 is 9 mm.

Specifically, the outer net 84 and the inner net 94 are made of metal, preferably, the outer net 84 and the inner net 94 are stainless steel gauze, the stainless steel is common, the manufacturing is simple, the corrosion resistance and the oxidation resistance are realized, the plasma discharge damage can be resisted, the surface for generating the plasma can be maximized by using the gauze as a discharge electrode, and the better sterilization effect is obtained.

Preferably, the mesh number of the outer net 84 is 20-40, preferably 30, and the mesh number of the inner net 94 is 25-50, preferably 35, so that an electromagnetic field is generated during discharging, especially a hysteresis effect generated by the magnetic field during a 50Hz period of alternating current, and a proper mesh number of the gauze needs to be selected so as to obtain a better discharging effect.

Specifically, still be provided with first electric piece 85 on first main part 81 still be provided with second electric piece 95 on second main part 91, first electric piece 85 and second electric piece 95 pass through electrode holder 4 fixed the setting and are in on bottom plate 1, electrode holder 4 is used for supporting fixedly on the one hand plasma tube 7, and on the other hand is used for plasma tube 7's electricity is connected.

In this embodiment, the electrode holder 4 includes the insulating post 41, the upper end of insulating post 41 with first electrical connection piece 85 or second electrical connection piece 95 pass through fastener 43 and link to each other, the other end of insulating post 41 with the bottom plate 1 links to each other, still be equipped with on the insulating post 41 and be used for the holding the fixed orifices of fastener 43, it is preferred, fastener 43 is the screw, have on the internal wall face of fixed orifices with screw matched with screw thread, the preferred, insulating post 41 is any kind in pottery, mica, asbestos, marble, porcelain, the glass, has insulating effectual, with low costs, it is preferred, insulating post 41 is ceramic material.

Preferably, an insulating pad 42 is further disposed between the insulating column 41 and the bottom plate 1, so that double insulation is achieved, and the safety of the product is further improved.

Specifically, as shown in fig. 6, a plurality of wire distributing members 3 are disposed between the transformer 2 and the plasma tube assembly 6, the wire distributing members 3 are used for electrically connecting two or more plasma tube assemblies 6 with one transformer 2, and the transformer 2 is fixedly disposed on the bottom plate 1 through a transformer bracket 5.

In this embodiment, as shown in fig. 1, every two distributing elements 3 and one transformer 2 form a transformer outgoing line assembly, in the transformer outgoing line assembly, the two distributing elements 3 are respectively electrically connected with an anode outgoing line or a cathode outgoing line of the transformer 2, and the two distributing elements 3 are respectively divided into a plurality of lines for electrically connecting with the plasma tube assembly 6.

Specifically, as shown in fig. 2, the wire distributing element 3 includes a wire inlet portion 31 and a wire outlet portion, the wire inlet portion 31 is used for electrically connecting with the transformer 2, the wire outlet portion includes a plurality of wire outlet members, the wire outlet members are used for electrically connecting with the plasma tube assemblies 6, preferably, in this embodiment, there are two wire outlet members, which are a first wire outlet member 32 and a second wire outlet member 33, respectively, it should be noted that the first wire outlet member 32 and the second wire outlet member 33 are respectively electrically connected with the homopolar electrodes of the two plasma tube assemblies 6, specifically, when the wire inlet portion 31 is connected with the anode wire outlet of the transformer 2, the first wire outlet member 32 and the second wire outlet member 33 are respectively electrically connected with the anode electrodes of the two plasma tube assemblies 6, and when the wire inlet portion 31 is connected with the cathode wire outlet of the transformer 2, the first wire outlet member 32 and the second wire outlet member 33 are respectively connected with the cathode electrodes of the two plasma tube assemblies 6, this setting makes one transformer 2 can drive two plasma tube component 6 work, when not reducing the product efficiency of disinfecting, has improved energy utilization effectively, has obtained good effect.

Preferably, the bottom plate 1 is further provided with a grounding portion 13 and a plurality of wire fixing portions 12, the wire fixing portions 12 are used for limiting connecting wires on the bottom plate 1, in order to prevent the connecting line from being blown by the inlet air and causing the plasma generator to malfunction, the grounding part 13 is used for ensuring the safe grounding of the product, preferably, the wire fixing part 12 is an arc structure punched upwards from the bottom plate 1, while ensuring the passage of the connection line and preventing the abrasion of the connection line, it should be understood that the line fixing part 12 may also be a hook or other structure with a line fixing function, preferably, at least two wire fixing parts 12 are arranged between each pair of the connected first electrode 8 and the wire dividing part 3, the arrangement limits the attachment of the connecting line on the bottom plate 1, and ensures the normal operation of the plasma generator. Preferably, at least one wire fixing part 12 is disposed on the bottom plate 1 between two adjacent ventilation holes 11, and the arrangement can limit the connecting wire of the end of the plasma tube assembly 6 away from the transformer 2 on the bottom plate 1, so as to avoid being influenced by the air flow when the plasma generator is in operation.

Example 2

This embodiment discloses an air sterilizer including a plasma generator as described in embodiment 1.

The air sterilizer has the same advantages as the plasma generator described in embodiment 1 over the prior art, and thus, the description thereof is omitted.

It should be noted that all terms used in the present invention for directional and positional indication, such as: "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "tail end", "head end", "center", etc. are only used to explain the relative positional relationship, connection conditions, etc. between the parts in a certain specific state, and only for the convenience of description the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. The plasma generator is characterized by comprising a bottom plate (1), wherein a plurality of plasma tube assemblies (6) and a plurality of transformers (2) are arranged on the bottom plate (1), the plasma tube assemblies (6) are fixedly arranged on the bottom plate (1) through electrode supports (4), the transformers (2) are electrically connected with the plasma tube assemblies (6), and the transformers (2) are used for providing voltage for the plasma tube assemblies (6) so that plasmas discharged outside can be generated by the plasma tube assemblies (6).

2. The plasma generator according to claim 1, wherein a ventilation hole (11) is provided on the base plate (1), and the ventilation hole (11) is provided in correspondence with the plasma tube assembly (6).

3. The plasma generator according to claim 2, wherein the number of the ventilation holes (11) is equal to the number of the plasma tube assemblies (6), and the ventilation holes are arranged in one-to-one correspondence.

4. The plasma generator according to claim 3, wherein a plurality of wire fixing portions (12) are further provided on the base plate (1), and the wire fixing portions (12) are used for limiting connection wires on the base plate (1).

5. The plasma generator according to claim 4, wherein at least one fixing line portion (12) is provided on the base plate (1) between adjacent two of said ventilation holes (11).

6. The plasma generator according to any of claims 1 to 5, wherein the electrode holder (4) comprises an insulating column (41), an upper end of the insulating column (41) is connected to the plasma tube assembly (6), the other end of the insulating column (41) is fixedly connected to the base plate (1), and an insulating pad (42) is further disposed between the insulating column (41) and the base plate (1).

7. The plasma generator according to claim 6, wherein the plasma tube assembly (6) comprises a first electrode (8), a second electrode (9), and a dielectric member, the first electrode (8) and the second electrode (9) being opposite positive and negative electrodes, the dielectric member being disposed between the first electrode (8) and the second electrode (9).

8. The plasma generator according to claim 7, wherein the dielectric member is a hollow structure plasma tube (7) having one end open and the other end closed, the discharge portion of the first electrode (8) is provided on an outer peripheral surface of the plasma tube (7), the discharge portion of the second electrode (9) is provided on an inner peripheral surface of the plasma tube (7), and the discharge portion of the first electrode (8) is provided corresponding to the discharge portion of the second electrode (9).

9. The plasma generator according to claim 8, wherein the discharge portion of the first electrode (8) is an outer mesh (84), the outer mesh (84) is sleeved and connected to the outside of the plasma tube (7), the discharge portion of the second electrode (9) is an inner mesh (94), and the inner mesh (94) is disposed on the inner circumferential surface of the plasma tube (7).

10. An air sterilizer, characterized in that it comprises a plasma generator according to any of claims 1-9.

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