Coaxial plasma tube and air purifier

Abstract

The invention provides a coaxial plasma tube and an air purifier, the air purifier is provided with the coaxial plasma tube, the coaxial plasma tube comprises a plasma assembly, the plasma assembly comprises an outer electrode, an insulating medium tube and an inner electrode, the outer electrode is connected with a positive electrode of a power supply, the inner electrode is connected with a negative electrode of the power supply, and the outer electrode is an integrally formed cylindrical metal net. The outer electrode is sleeved on the outer wall surface of the insulating medium tube in a fitting manner, and the outer electrode and the insulating medium tube are coaxially arranged, so that the coaxiality can be well ensured, and further, the outer electrode and the insulating medium tube can be ensured to be stably and uniformly contacted, and the inner electrode is a conductive layer coated on the inner wall surface of the insulating medium tube. The inner electrode and the insulating medium tube are better ensured to be stably and uniformly contacted, the problem that the shape of the existing inner electrode in the tube is difficult to control and the inner electrode is easy to deform can be thoroughly eliminated, so that the outer electrode and the inner electrode are uniformly contacted with the insulating medium tube, the discharge is uniform, and the purposes of controllable ozone amount and controllable plasma amount are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of air purification, and in particular to a coaxial plasma tube and an air purifier. Background Art

[0002] At present, environmental pollution has led to a decline in air quality. In order to improve indoor air quality, people use air purifiers to purify the air. Air purifiers mainly use the plasma released by plasma tubes to purify the air. Plasma has the function of killing bacteria, viruses, fungi, etc. It can also decompose formaldehyde, benzene and other volatile organic compounds to reduce pollutants in the air and improve air quality.

[0003] Air purification devices that adopt the dielectric barrier discharge principle are widely used in environmental pollution control. In the existing air purification devices that adopt the dielectric barrier discharge principle, the inner electrode-insulating medium tube-outer electrode structure is a more common type. The outer electrode and the inner electrode usually adopt a metal woven mesh or a punched mesh or other similar structure. The structure is complex and the shape is irregular and uneven. The inner electrode and the outer electrode are easily deformed, resulting in uneven contact between the electrode and the insulating medium tube, uneven discharge, and a large amount of ozone is generated during use, making it difficult for humans and machines to coexist. In addition, the shape of the inner electrode in the insulating medium tube is difficult to control, which makes the electric field distribution uneven, and the adaptability to different working conditions is poor, and the sterilization effect is poor.

[0004] Therefore, how to improve the problem of excessive ozone caused by uneven contact between the electrode and the insulating medium layer of the existing plasma device is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] In view of this, the present application provides a coaxial plasma tube and an air purifier, aiming to effectively solve the problem of excessive ozone generation due to uneven contact between the above-mentioned electrode and the insulating medium layer.

[0006] The present application provides a coaxial plasma tube, including a plasma component, wherein the plasma component includes an outer electrode, an insulating medium tube and an inner electrode, wherein the outer electrode is an integrally formed cylindrical metal mesh, the outer electrode is snugly sleeved on the outer wall surface of the insulating medium tube, and the outer electrode is coaxial with the insulating medium tube, the inner electrode is a conductive layer coated on the inner wall surface of the insulating medium tube, the outer electrode is connected to the positive electrode of a power supply, and the inner electrode is connected to the negative electrode of a power supply.

[0007] In one embodiment, the plasma assembly includes an outer terminal cap, an inner terminal cap, an outer terminal conducting assembly and an inner terminal conducting assembly, wherein the outer terminal cap is fixedly sleeved on one end of the insulating medium tube and fixes the outer electrode, the outer terminal conducting assembly is supported and fixed on the outer terminal cap and is conductively connected to the outer electrode, the inner terminal cap is fixedly sleeved on the other end of the insulating medium tube, and the inner terminal conducting assembly is supported and fixed on the inner terminal cap and is conductively connected to the inner electrode.

[0008] In one embodiment, the outer pole conduction assembly includes an outer pole conduction member and an outer pole fixing member, the outer pole conduction member includes an outer pole fixing portion and a plurality of outer pole elastic arms connected to the periphery of the outer pole fixing portion, the outer pole fixing portion is fixed to the end surface of the outer pole end cap through the outer pole fixing member, and the bent portion of the outer pole elastic arm abuts against the outer electrode.

[0009] In one embodiment, the outer pole cap includes an outer pole plate and an outer pole frame connected to the periphery of the outer pole plate, the outer pole frame is pressed on the outer electrode, the outer pole plate is provided with an outer pole connecting groove corresponding to the insulating medium tube, and the first end of the insulating medium tube is fixedly connected to the outer pole connecting groove; and / or, the inner pole cap includes an inner pole plate and an inner pole frame connected to the periphery of the inner pole plate, the inner pole plate is provided with an inner pole connecting groove corresponding to the insulating medium tube, the second end of the insulating medium tube is fixedly connected to the inner pole connecting groove, and a plurality of grooves are provided on the outer wall of the inner pole frame.

[0010] In one embodiment, the inner pole conducting assembly includes an inner pole conducting member and an inner pole conducting rod disposed in the insulating medium tube, the inner pole conducting member includes an inner pole fixing portion and a plurality of inner pole elastic arms connected to the periphery of the inner pole fixing portion and inclined outward, the inner pole fixing portion is fixed to one end of the inner pole conducting rod by a first inner pole fixing member, the bent portion of the inner pole elastic arm abuts against the inner electrode, and the other end of the inner pole conducting rod is fixed to the inner pole terminal cap by a second inner pole fixing member.

[0011] In one embodiment, the outer terminal cap, the inner terminal cap, the outer pole conductive connection assembly and the inner pole conductive connection assembly are all coaxially arranged with the insulating medium tube.

[0012] In one embodiment, the coaxial plasma tube includes a base, a first mounting seat, a second mounting seat, a first joint assembly and a second joint assembly, the first mounting seat and the second mounting seat are fixed on the base and spaced apart, the first joint assembly is mounted on the first mounting seat, the second joint assembly is mounted on the second mounting seat, and the plasma assembly is detachably mounted between the first joint assembly and the second joint assembly.

[0013] In one embodiment, the first joint assembly includes a joint outer seat, a joint inner seat, an elastic member, a joint fixing member and a stop member, the joint outer seat is detachably fixed to the first mounting seat, the joint inner seat is telescopically mounted on the joint outer seat through the elastic member, the stop member is fixedly connected to the joint inner seat through the joint fixing member, and the stop member is engaged with the joint outer seat; the second joint assembly includes a joint connecting portion and a joint fixing portion connected to the joint connecting portion, and the joint connecting portion is fixedly mounted on the second mounting seat through the joint fixing portion.

[0014] In one embodiment, the coaxial plasma tube includes a positive cable and a negative cable, the positive cable is fixedly connected to the connector fixing member through a positive fixing member, and the negative cable is fixedly connected to the connector fixing portion through a negative fixing member; and / or, a positive connection groove is provided at one end of the connector inner seat close to the plasma component, and a part of the connector fixing member is located in the positive connection groove, and the positive connection groove is used for the external pole conducting component to be connected, and a negative connection groove is provided at one end of the connector connecting portion close to the plasma component, and the negative connection groove is used for the internal pole conducting component to be connected; and / or, the first connector assembly and the second connector assembly are both coaxially arranged with the insulating medium tube.

[0015] The present application also provides an air purifier, which includes the coaxial plasma tube as described above.

[0016] In summary, the present application provides a coaxial plasma tube and an air purifier. The air purifier is equipped with a coaxial plasma tube, which includes a plasma component, which includes an outer electrode, an insulating medium tube and an inner electrode. The outer electrode is connected to the positive electrode of a power supply, and the inner electrode is connected to the negative electrode of the power supply. The outer electrode is an integrally formed cylindrical metal mesh, and the outer electrode is fittedly sleeved on the outer wall surface of the insulating medium tube. The outer electrode and the insulating medium tube are coaxially arranged, which can well ensure the coaxiality, thereby ensuring that the outer electrode and the insulating medium tube can be in stable and uniform contact. The inner electrode is a conductive layer coated on the inner wall surface of the insulating medium tube, which can better ensure that the inner electrode and the insulating medium tube are in stable and uniform contact, and can completely eliminate the problem that the shape of the existing inner electrode in the tube is difficult to control and easy to deform. Such an arrangement makes the outer electrode and the inner electrode both in uniform contact with the insulating medium tube, so that the discharge is uniform, thereby achieving the purpose of controllable ozone amount and controllable plasma amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the coaxial plasma tube of the present application.

[0018] Figure 2 It is a side view of the coaxial plasma tube of the present application.

[0019] Figure 3 for Figure 2 Exploded diagram of the coaxial plasma tube.

[0020] Figure 4 for Figure 2 Side cross-sectional view of the coaxial plasma tube.

[0021] Figure numerals: 10-coaxial plasma tube; 12-plasma assembly; 14-external electrode; 16-insulating medium tube; 18-inner electrode; 20-external end cap; 22-inner end cap; 24-external pole conducting assembly; 26-inner pole conducting assembly; 28-first end; 30-second end; 32-external pole end plate; 34-external pole frame; 36-external pole connecting groove; 38-inner pole end plate; 40-inner pole frame; 42-inner pole connecting groove; 44-groove; 46-external pole conducting member; 48-external pole fixing member; 50-external pole fixing portion; 52-external pole elastic arm; 54-straight portion; 56-bent portion; 58-recessed portion; 60-nut; 62-inner pole conducting member; 64-inner pole conducting rod; 66-inner pole fixing portion; 68 -inner pole elastic arm; 70-inclined portion; 72-bending portion; 74-first inner pole fixing member; 76-second inner pole fixing member; 78-base; 80-first mounting seat; 82-second mounting seat; 84-first connector assembly; 86-second connector assembly; 88-connector outer seat; 90-connector inner seat; 92-elastic member; 94-connector fixing member; 96-stop member; 98-connector cylinder; 100-elastic buckle; 102-stop part; 104-connector body; 106-stop protrusion; 108-connector connecting part; 110-connector fixing part; 112-positive cable; 114-negative cable; 116-positive fixing member; 118-negative fixing member; 120-positive electrode connection slot; 122-negative electrode connection slot. DETAILED DESCRIPTION

[0022] Before describing the embodiments in detail, it should be understood that the present application is not limited to the detailed structure or component arrangement described below or in the drawings in the present application. The present application may be an embodiment implemented in other ways. Moreover, it should be understood that the words and terms used herein are only used for descriptive purposes and should not be interpreted restrictively. The words "including", "comprising", "having" and the like used herein are meant to include the items listed thereafter, their equivalents and other additional items. In particular, when describing "a certain element", the present application does not limit the number of the element to one, but may also include multiple elements.

[0023] Please also refer to Figures 1 to 4As shown, the present application provides a coaxial plasma tube 10 for releasing plasma when powered on. The plasma can kill bacteria, viruses, fungi, etc., and can decompose volatile organic compounds or malodorous gases such as formaldehyde and benzene into harmless and odorless gases, thereby achieving the effect of purifying the air. The coaxial plasma tube 10 includes a plasma component 12, which includes an outer electrode 14, an insulating medium tube 16 and an inner electrode 18, wherein the outer electrode 14 is connected to the positive electrode of the power supply, and the inner electrode 18 is connected to the negative electrode of the power supply. The outer electrode 14 is an integrally formed cylindrical metal mesh, and the outer electrode 14 is snugly sleeved on the outer wall surface of the insulating medium tube 16. The outer electrode 14 and the insulating medium tube 16 are coaxially arranged, which can well ensure the coaxiality, thereby ensuring that the outer electrode 14 and the insulating medium tube 16 can be stably and evenly contacted, and the inner electrode 18 is a conductive layer coated on the inner wall surface of the insulating medium tube 16, which can better ensure that the inner electrode 18 and the insulating medium tube 16 are stably and evenly contacted, and can completely eliminate the problem that the shape of the existing inner electrode in the tube is difficult to control and easy to deform. Such an arrangement makes the outer electrode 14 and the inner electrode 18 both uniformly contact the insulating medium tube 16, so that the discharge is uniform, thereby achieving the purpose of controllable ozone amount and controllable plasma amount.

[0024] Preferably, the outer electrode 14 is made of stainless steel, and a cylindrical stainless steel grid is manufactured by integrally forming with a mold to ensure the cylindricity, and then ensure the coaxiality with the insulating medium tube 16, and can fit the insulating medium tube 16 well to form a uniform electric field, and will not deform during transportation and long-term use, thereby ensuring the stability of the performance and solving the problem of unstable plasma release; the inner electrode 18 is made of graphite, and uses a conductive graphite layer, which has the characteristics of good conductivity and stable performance, thereby ensuring the constancy of the electric field and avoiding the problem of large ozone release caused by uneven fitting between the inner electrode and the insulating medium tube 16 due to transportation and metal deformation; the insulating medium tube 16 is made of quartz glass, for example, a cylindrical tube.

[0025] like Figure 1 and Figure 2 As shown, the plasma assembly 12 includes an outer terminal cap 20, an inner terminal cap 22, an outer pole conducting assembly 24 and an inner pole conducting assembly 26. The insulating medium tube 16 has a first end 28 and a second end 30 opposite to each other. The outer terminal cap 20 is fixedly sleeved on the first end 28 of the insulating medium tube 16 and fixes the outer electrode 14. The outer pole conducting assembly 24 is supported and fixed on the outer terminal cap 20 and is conductively connected to the outer electrode 14. The inner terminal cap 22 is fixedly sleeved on the second end 30 of the insulating medium tube 16. The inner pole conducting assembly 26 is supported and fixed on the inner terminal cap 22 and is conductively connected to the inner electrode 18.

[0026] For details, please also refer to Figure 3 and Figure 4As shown, the outer end cap 20 includes an outer end plate 32 and an outer pole frame 34 connected to the periphery of the outer end plate 32. The outer end plate 32 and the outer pole frame 34 are, for example, an integrally formed structure. The outer end plate 32 covers the first end 28 of the insulating medium tube 16, and the outer pole frame 34 is located on the side of the outer end plate 32 facing the second end 30. The inner wall surface of the outer pole frame 34 is pressed on the outer electrode 14, which can play a role in fixing the outer electrode 14, so that the outer electrode 14 can be better fitted on the insulating medium tube 16, improve the contact uniformity, and avoid deformation during transportation or long-term use and uneven contact. Further, a circular outer pole connection groove 36 is provided on the inner wall of the outer end plate 32 corresponding to the end of the insulating medium tube 16, and the first end 28 of the insulating medium tube 16 is fixedly connected in the outer pole connection groove 36, so that the outer end cap 20 is fixed relative to the insulating medium tube 16. Preferably, the first end 28 of the insulating medium tube 16 is bonded and fixed to the outer pole connection groove 36 by electronic white glue, and the electronic white glue has good insulation and bonding properties. The outer pole cap 20 can be made of plastic or ceramic material, and the outer pole cap 20 is preferably made of ceramic material to increase insulation and durability.

[0027] The inner pole cap 22 includes an inner pole plate 38 and an inner pole frame 40 connected to the periphery of the inner pole plate 38. The inner pole plate 38 and the inner pole frame 40 are, for example, an integrally formed structure. The inner pole plate 38 is connected to the second end 30 of the insulating medium tube 16, and the inner pole frame 40 is located on the side of the inner pole plate 38 facing the first end 28. There is a certain spacing distance between the inner pole frame 40 and the insulating medium tube 16 to increase the creepage distance. Further, an inner pole connection groove 42 is provided on the inner wall of the inner pole plate 38 corresponding to the end of the insulating medium tube 16, and the second end 30 of the insulating medium tube 16 is fixedly connected to the inner pole connection groove 42, so that the inner pole cap 22 is fixed relative to the insulating medium tube 16. Preferably, the second end 30 of the insulating medium tube 16 is fixed to the inner pole connection groove 42 by electronic white glue, and the electronic white glue has good insulation and bonding properties. The inner pole cap 22 can be made of plastic or ceramic material, and the inner pole cap 22 is preferably made of ceramic material to increase insulation and durability.

[0028] In the prior art, due to the close distance between the high-voltage outer electrode and the high-voltage inner electrode, the insulation of the insulating medium tube deteriorates after long-term use, and there is a problem of creepage causing the plasma tube to burn out. In this embodiment, a plurality of grooves 44 are provided on the outer wall of the inner pole frame 40, so that the inner pole end cap 22 is serrated. By providing the grooves 44, the distance between the negative pole and the insulating medium tube 16 can be effectively lengthened, thereby greatly increasing the creepage distance, effectively solving the problem of creepage ignition and burning the plasma tube. In addition, the inner pole end cap 22 is made of ceramic material to increase insulation and reduce the risk of creepage. Preferably, a plurality of grooves 44 are arranged at intervals in the axial direction of the inner pole end cap 22, and each groove 44 extends into a circular ring shape along the circumference of the inner pole frame 40. For example, two grooves 44 are provided, and the depth of the grooves 44 can be determined according to actual design requirements.

[0029] like Figure 3 and Figure 4 As shown, the outer pole conducting assembly 24 has a conductive property, and the outer pole conducting assembly 24 includes an outer pole conducting member 46 and an outer pole fixing member 48 which are electrically connected, and the outer pole conducting member 46 is fixedly connected to the outer pole end cap 20 through the outer pole fixing member 48. Specifically, the outer pole conducting member 46 includes a circular outer pole fixing portion 50 and a plurality of outer pole elastic arms 52 connected to the periphery of the outer pole fixing portion 50, and the plurality of outer pole elastic arms 52 are evenly spaced, and the outer pole fixing portion 50 is fixedly attached to the outer end surface of the outer pole end plate 32 through the outer pole fixing member 48. The outer pole elastic arm 52 includes a straight portion 54 and a bent portion 56. The straight portion 54 is connected between the outer pole fixing portion 50 and the bent portion 56. The bent portion 56 is bent radially inward relative to the straight portion 54. The straight portion 54 is attached to the outer wall surface of the outer pole frame 34. The lowest bending point of the bent portion 56 abuts against the outer electrode 14, and the bent portion 56 always maintains good contact with the outer electrode 14 under the action of its own elastic force. At the same time, it has a pressing and fixing effect on the outer electrode 14, thereby improving the contact stability. In addition, such an arrangement can facilitate the disassembly, assembly and maintenance of the outer pole conductive assembly 24.

[0030] Furthermore, a recess 58 is formed in the center of the outer pole plate 32 toward the inside of the insulating medium tube 16, and a nut 60 is fixedly embedded in the recess of the recess 58. The outer pole fixing member 48 is, for example, a screw, and a through hole is provided in the center of the outer pole fixing portion 50. During installation, the outer pole fixing member 48 is threadedly connected to the nut 60 through the through hole, so that the outer pole conductor 46 is fixed relative to the outer pole cover 20, and the head of the outer pole fixing member 48 is located outside the end surface of the outer pole plate 32 to facilitate subsequent connection with the positive pole of the power supply.

[0031] The inner pole conducting assembly 26 has conductive properties, and includes an inner pole conducting member 62 and an inner pole conducting rod 64 disposed in the insulating medium tube 16, wherein the inner pole conducting member 62 includes a circular inner pole fixing portion 66 and a plurality of inner pole elastic arms 68 connected to the periphery of the inner pole fixing portion 66 and inclined outwardly, the inner pole conducting member 62 is petal-shaped, and the inner pole elastic arms 68 include an inclined portion 70 and a bent portion 72, the inclined portion 70 is connected between the inner pole fixing portion 66 and the bent portion 72, and the bent portion 72 is further bent radially outward relative to the inclined portion 70, so that the end of the bent portion 72 abuts against the inner electrode 18, thereby achieving conductive connection between the inner pole conducting member 62 and the inner electrode 18.

[0032] In the illustrated embodiment, the inner pole conductive connector 62 is located in the central area of ​​the insulating medium tube 16, close to one side of the inner pole end cap 22, the inner pole conductive connector rod 64 is located between the inner pole conductive connector 62 and the inner pole end cap 22, the inner pole fixing portion 66 is fixed to one end of the inner pole conductive connector rod 64 by a first inner pole fixing member 74, and the other end of the inner pole conductive connector rod 64 is fixed to the inner pole end cap 22 by a second inner pole fixing member 76. Specifically, the first inner pole fixing member 74 and the second inner pole fixing member 76 are both screws, the inner pole conducting rod 64 is a stud made of copper, and screw holes are respectively provided at the opposite ends of the inner pole conducting rod 64. One end of the inner pole conducting rod 64 abuts against the side surface of the inner pole fixing portion 66, and a through hole is provided at the center of the inner pole fixing portion 66. The first inner pole fixing member 74 passes through the through hole and is threadedly connected to the corresponding screw hole to fix the inner pole conducting member 62 relative to the inner pole conducting rod 64; the other end of the inner pole conducting rod 64 abuts against the inner side surface of the inner extreme plate 38, and a through hole is provided at the center of the inner extreme plate 38. The second inner pole fixing member 76 passes through the through hole from the outside of the through hole and is threadedly connected to the screw hole at the corresponding end of the inner pole conducting rod 64 to fix the inner pole conducting rod 64 relative to the inner extreme cover 22, thereby supporting and fixing the inner pole conducting assembly 26 on the inner extreme cover 22. A protrusion is formed on the outer surface of the inner pole plate 38 around the corresponding through hole, and the head of the second inner pole fixing member 76 is located outside the protrusion to facilitate subsequent connection with the negative pole of the power supply.

[0033] In the illustrated embodiment, the coaxial plasma tube 10 includes a base 78, a first mounting seat 80, a second mounting seat 82, a first joint assembly 84 and a second joint assembly 86, wherein the first mounting seat 80 and the second mounting seat 82 are fixed on the base 78 and spaced apart, the first joint assembly 84 is mounted on the first mounting seat 80, and the second joint assembly 86 is mounted on the second mounting seat 82. For example, a first mounting hole is provided on the first mounting seat 80, and a second mounting hole is provided on the second mounting seat 82. The first mounting hole and the second mounting hole are coaxially arranged. The first joint assembly 84 is detachably mounted on the first mounting hole, and the second joint assembly 86 is detachably mounted on the second mounting hole. The plasma assembly 12 is detachably mounted between the first joint assembly 84 and the second joint assembly 86. The detachable installation can facilitate disassembly and maintenance.

[0034] Specifically, the first joint assembly 84 includes a joint outer seat 88, a joint inner seat 90, an elastic member 92, a joint fixing member 94 and a stopper 96. The joint outer seat 88 is detachably fixed to the first mounting seat 80. For example, the joint outer seat 88 includes a joint cylinder 98, an elastic buckle 100 provided at one end of the outer wall of the joint cylinder 98, and a stopper 102 provided at the other end of the outer wall of the joint cylinder 98. The joint cylinder 98 is a structure with two ends open. When installed, the elastic buckle 100 is fixed to the first mounting hole, and at the same time, the stopper 102 cooperates with the elastic buckle 100 to be fixed to the first mounting seat 80, so that the joint outer seat 88 is buckled and fixed to the first mounting seat 80. The joint inner seat 90 is telescopically mounted on the joint outer seat 88 through an elastic member 92. The joint inner seat 90 includes a joint body 104 and a stop protrusion 106 provided on the outer wall of the joint body 104. The joint inner seat 90 is movably inserted into the joint cylinder 98 from the inner port of the joint cylinder 98. The elastic member 92 is, for example, a spring. One end of the elastic member 92 abuts against the end wall inside the joint cylinder 98, and the other end abuts against the stop protrusion 106. The elastic member 92 applies an elastic bias to the joint inner seat 90 to move it toward the side of the plasma component 12.

[0035] The stopper 96 is fixedly connected to the joint inner seat 90 through the joint fixing member 94, and the stopper 96 is in a stoppering fit with the joint outer seat 88. Specifically, the joint fixing member 94 is a screw, the joint fixing member 94 is axially penetrated in the joint body 104, and the joint fixing member 94 is fixedly connected with the joint body 104, and the stopper 96 is fixedly sleeved on the part of the joint fixing member 94 that passes through the joint body 104, so that the joint inner seat 90, the joint fixing member 94 and the stopper 96 are relatively fixed, and the size of the stopper 96 is larger than the size of the inner cavity of the joint cylinder 98, so that the stopper 96 and the joint outer seat 88 form a stoppering fit relationship, preventing the joint inner seat 90 and the elastic member 92 from escaping from the inner cavity of the joint cylinder 98.

[0036] The second connector assembly 86 is a conductor, and the second connector assembly 86 includes a connector connecting portion 108 and a connector fixing portion 110 connected to one side of the connector connecting portion 108. The connector connecting portion 108 is fixedly mounted on the second mounting seat 82 through the connector fixing portion 110. For example, the connector fixing portion 110 is fixedly inserted into the second mounting hole, so that the connector connecting portion 108 is fixedly fitted on the inner side surface of the second mounting seat 82.

[0037] In the illustrated embodiment, the coaxial plasma tube 10 includes a positive cable 112 and a negative cable 114. The positive cable 112 is used to inject positive high voltage electricity, and the negative cable 114 is used to inject negative high voltage electricity. The positive cable 112 is fixedly connected to the end of the connector fixing member 94 passing through the connector body 104 via a positive fixing member 116, and the negative cable 114 is fixedly connected to the part of the connector fixing portion 110 passing through the second mounting hole via a negative fixing member 118. The positive fixing member 116 and the negative fixing member 118 are both nuts, for example.

[0038] More specifically, a positive electrode connection groove 120 is provided at one end of the connector body 104 close to the plasma component 12. The positive electrode connection groove 120 is the end portion of the connector body 104 through which the connector fixing member 94 is penetrated, and the end portion is enlarged. The head of the connector fixing member 94 is located in the positive electrode connection groove 120. The positive electrode connection groove 120 is used for the external pole conductor component 24, such as the external pole fixing member 48 to be connected. When connected, the head of the external pole fixing member 48 is inserted into the positive electrode connection groove 120 and abuts against the head of the connector fixing member 94, so that the external electrode 14 is connected to the positive cable 112 through the external pole conductor 46, the external pole fixing member 48, and the connector fixing member 94. A negative electrode connection groove 122 is provided at one end of the joint connection portion 108 close to the plasma assembly 12. The negative electrode connection groove 122 is used for the inner pole conducting assembly 26, such as the second inner pole fixing member 76 to be connected. When connected, the head of the second inner pole fixing member 76 is inserted into the negative electrode connection groove 122, so that the inner electrode 18 is connected to the negative electrode cable 114 through the inner pole conducting member 62, the inner pole conducting rod 64, the second inner pole fixing member 76, and the second joint assembly 86.

[0039] By providing the base 78, the first mounting seat 80, the second mounting seat 82, the first joint assembly 84 and the second joint assembly 86, the plasma assembly 12 can be fixed left and right, the transportation stability is improved, and the problems of electrode deformation and contact area reduction caused by transportation are effectively solved. The plasma assembly 12 can be quickly disassembled and assembled by using a quick joint, without screwing or other tools. The installation is done in three steps and the disassembly is done in two steps, which is convenient and quick. During installation, first insert the head of the second inner pole fixing member 76 into the negative electrode connection slot 122, then squeeze the joint inner seat 90 inward by hand to make it shrink inward, insert the head of the outer pole fixing member 48 into the positive electrode connection slot 120, and release the hand to complete the installation. The plasma assembly 12 is clamped more firmly under the elastic bias of the elastic member 92; during disassembly, first squeeze the joint inner seat 90 inward by hand to make it shrink inward, take the plasma assembly 12 so that the outer pole fixing member 48 is separated from the positive electrode connection slot 120, and the second inner pole fixing member 76 is separated from the negative electrode connection slot 122, so as to realize the disassembly of the plasma assembly 12. Such a configuration allows the coaxial plasma tube 10 to achieve modular installation, reduce installation difficulty and installation time, and reduce costs.

[0040] In this embodiment, the outer pole end cap 20, the inner pole end cap 22, the outer pole conductive connection assembly 24, the inner pole conductive connection assembly 26, the first joint assembly 84 and the second joint assembly 86 are all coaxially arranged with the insulating medium tube 16, so that the coaxial plasma tube 10 is coaxial as a whole, further increasing the contact stability between the electrode and the insulating medium tube 16, making the contact surface constant and the electric field constant, thereby increasing the stability of conduction and the electric field, and further increasing the performance stability of the coaxial plasma tube 10.

[0041] The present application also provides an air purifier, which includes the coaxial plasma tube 10 as described above.

[0042] In summary, the present application provides a coaxial plasma tube and an air purifier. The air purifier is equipped with a coaxial plasma tube, which includes a plasma component, which includes an outer electrode, an insulating medium tube and an inner electrode. The outer electrode is connected to the positive electrode of a power supply, and the inner electrode is connected to the negative electrode of the power supply. The outer electrode is an integrally formed cylindrical metal mesh, and the outer electrode is fittedly sleeved on the outer wall surface of the insulating medium tube. The outer electrode and the insulating medium tube are coaxially arranged, which can well ensure the coaxiality, thereby ensuring that the outer electrode and the insulating medium tube can be in stable and uniform contact. The inner electrode is a conductive layer coated on the inner wall surface of the insulating medium tube, which can better ensure that the inner electrode and the insulating medium tube are in stable and uniform contact, and can completely eliminate the problem that the shape of the existing inner electrode in the tube is difficult to control and easy to deform. Such an arrangement makes the outer electrode and the inner electrode both in uniform contact with the insulating medium tube, so that the discharge is uniform, thereby achieving the purpose of controllable ozone amount and controllable plasma amount.

[0043] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments disclosed should be considered illustrative rather than restrictive. Therefore, the scope of this application is determined by the appended claims rather than by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of these claims.

Claims

1. A coaxial plasma tube, characterized in that: The invention comprises a plasma component, wherein the plasma component comprises an outer electrode, an insulating medium tube and an inner electrode, wherein the outer electrode is an integrally formed cylindrical metal mesh, the outer electrode is fittedly sleeved on the outer wall surface of the insulating medium tube, and the outer electrode is coaxial with the insulating medium tube, and the inner electrode is a conductive layer coated on the inner wall surface of the insulating medium tube, the outer electrode is connected to the positive electrode of a power supply, and the inner electrode is connected to the negative electrode of a power supply.

2. The coaxial plasma tube according to claim 1, characterized in that: The plasma assembly includes an outer terminal cap, an inner terminal cap, an outer pole conducting assembly and an inner pole conducting assembly. The outer terminal cap is fixedly sleeved on one end of the insulating medium tube and fixes the outer electrode. The outer pole conducting assembly is supported and fixed on the outer terminal cap and is conductively connected to the outer electrode. The inner terminal cap is fixedly sleeved on the other end of the insulating medium tube. The inner pole conducting assembly is supported and fixed on the inner terminal cap and is conductively connected to the inner electrode.

3. The coaxial plasma tube according to claim 2, characterized in that: The outer pole conducting assembly includes an outer pole conducting member and an outer pole fixing member, the outer pole conducting member includes an outer pole fixing portion and a plurality of outer pole elastic arms connected to the periphery of the outer pole fixing portion, the outer pole fixing portion is fixed to the end surface of the outer pole terminal cover through the outer pole fixing member, and the bent portion of the outer pole elastic arm abuts against the outer electrode.

4. The coaxial plasma tube according to claim 2, characterized in that: The outer pole end cap includes an outer pole end plate and an outer pole frame connected to the periphery of the outer pole end plate, the outer pole frame is pressed on the outer electrode, the outer pole end plate is provided with an outer pole connecting groove corresponding to the insulating medium tube, and the first end of the insulating medium tube is fixedly connected to the outer pole connecting groove; and / or, the inner pole end cap includes an inner pole end plate and an inner pole frame connected to the periphery of the inner pole end plate, the inner pole end plate is provided with an inner pole connecting groove corresponding to the insulating medium tube, the second end of the insulating medium tube is fixedly connected to the inner pole connecting groove, and a plurality of grooves are provided on the outer wall of the inner pole frame.

5. The coaxial plasma tube according to claim 2, characterized in that: The inner pole conducting assembly includes an inner pole conducting member and an inner pole conducting rod arranged in the insulating medium tube, the inner pole conducting member includes an inner pole fixing portion and a plurality of inner pole elastic arms connected to the periphery of the inner pole fixing portion and inclined outward, the inner pole fixing portion is fixed to one end of the inner pole conducting rod by a first inner pole fixing member, the bent portion of the inner pole elastic arm abuts against the inner electrode, and the other end of the inner pole conducting rod is fixed to the inner pole terminal cap by a second inner pole fixing member.

6. The coaxial plasma tube according to claim 2, characterized in that: The outer terminal cap, the inner terminal cap, the outer pole conducting assembly and the inner pole conducting assembly are all coaxially arranged with the insulating medium tube.

7. The coaxial plasma tube according to claim 2, characterized in that: The coaxial plasma tube includes a base, a first mounting seat, a second mounting seat, a first joint assembly and a second joint assembly. The first mounting seat and the second mounting seat are fixed on the base and arranged at intervals. The first joint assembly is installed on the first mounting seat, and the second joint assembly is installed on the second mounting seat. The plasma assembly is detachably installed between the first joint assembly and the second joint assembly.

8. The coaxial plasma tube according to claim 7, characterized in that: The first joint assembly includes a joint outer seat, a joint inner seat, an elastic member, a joint fixing member and a stop member, the joint outer seat is detachably fixed to the first mounting seat, the joint inner seat is telescopically mounted on the joint outer seat through the elastic member, the stop member is fixedly connected to the joint inner seat through the joint fixing member, and the stop member is engaged with the joint outer seat; the second joint assembly includes a joint connecting portion and a joint fixing portion connected to the joint connecting portion, the joint connecting portion is fixedly mounted on the second mounting seat through the joint fixing portion.

9. The coaxial plasma tube according to claim 8, characterized in that: The coaxial plasma tube includes a positive cable and a negative cable, the positive cable is fixedly connected to the joint fixing member through a positive fixing member, and the negative cable is fixedly connected to the joint fixing part through a negative fixing member; and / or, a positive connection groove is provided at one end of the joint inner seat close to the plasma component, and a part of the joint fixing member is located in the positive connection groove, and the positive connection groove is used for the external pole conducting component to be connected, and a negative connection groove is provided at one end of the joint connecting part close to the plasma component, and the negative connection groove is used for the internal pole conducting component to be connected; and / or, the first joint assembly and the second joint assembly are both coaxially arranged with the insulating medium tube.

10. An air purifier, characterized in that: The air purifier comprises a coaxial plasma tube as claimed in any one of claims 1 to 9.

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