A high-efficiency plasma purification device and electrode combination process

Abstract

The invention provides a high-efficiency plasma purification device, which comprises at least one grid array unit and a circuit module, wherein each grid array unit comprises three ion tubes arranged in a line, a parallel spacing is provided between two adjacent ion tubes, the ion tubes comprise an outer electrode, a dielectric and an inner electrode from outside to inside, the inner electrode and the outer electrode of the same ion tube have opposite polarities, the inner electrodes of two adjacent ion tubes have opposite polarities, the outer electrodes of two adjacent ion tubes have opposite polarities, the outer electrode is provided with a plurality of uniform and dense openings, and the inner electrode is provided with a vacant part. The invention can sterilize and purify air quickly and efficiently, and the invention also provides an electrode combination process of a high-efficiency plasma purification device, which can improve the preparation speed, control the scrap rate of materials, and the generated aluminum oxide surface layer has high density, thereby improving the effect of dielectric barrier discharge.

Description

Technical Field

[0001] The invention relates to the technical field of plasma, and in particular to an electrode combination process of a high-efficiency plasma purification device. Background Art

[0002] Air conditioners are widely used for a long time in modern office buildings, large hospitals, large shopping malls, and large hotels. The long-term operation of air conditioners in a closed indoor environment provides favorable conditions for the survival and reproduction of bacteria and viruses. In particular, a large number of bacteria and viruses are easily bred in ventilation ducts that have been in operation for many years. These bacteria and viruses circulate in the air, posing serious health and safety risks. Especially in public places open to the public, there are messy people coming and going. Bacteria and viruses in the air can easily cause cross-infection of bacteria and viruses through the ventilation system of central air conditioners. However, due to the complex structure of the central air conditioner pipeline and the small space, it is difficult to enter directly for cleaning. Even if the fresh air system is turned on, it is difficult to ensure that bacteria and viruses are effectively disinfected. Therefore, in order to prevent the spread of bacteria and viruses in the indoor environment, centralized and unified disinfection is required. There is an urgent need for equipment specifically for centralized and unified sterilization and disinfection of air conditioning ventilation systems.

[0003] Traditional disinfection technology has inevitable defects. For example, chemical disinfection is prone to secondary pollution and certain toxic side effects. The principle of using ultraviolet rays for disinfection has the defect that there will be places where light cannot reach, and those places where light cannot reach will become blind spots for disinfection.

[0004] Therefore, it is very necessary to develop and produce an air purification device that can avoid the defects of traditional disinfection methods and can disinfect quickly and effectively.

[0005] Plasma technology is a sterilization and disinfection technology that is both fast and green without secondary pollution. It is considered to be one of the technologies with the most application prospects. Plasma is the fourth state of matter in addition to the three states of gas, liquid and solid. It is formed by ionizing gas under high voltage. Plasma contains a large number of active oxygen ions, high-energy free radicals and other components, which can easily undergo a series of electrochemical reactions with proteins and nucleic acids in bacteria and viruses to denature, causing the death of various microorganisms. Plasma can also oxidize or degrade harmful substances in the air, achieving the functions of sterilization, deodorization, dust collection and multi-directional air purification without causing secondary pollution.

[0006] Existing air purification devices that use plasma technology for sterilization and disinfection all use corona discharge technology that makes the electrode configuration present a variety of forms, which ionizes the gas to form plasma. However, the existing plasma air purification devices use corona discharge technology, and the amount of plasma generated is relatively low. In practical applications, it is difficult to ionize the gas to a large extent, thereby generating a large amount of plasma, and it is impossible to quickly sterilize and purify the air. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the problem that the amount of plasma generated by the corona discharge technology used in the existing plasma air purification device is relatively low, making it difficult for the air conditioning ventilation system to form a large amount of plasma and unable to achieve the effect of rapid sterilization, disinfection and purification.

[0008] In order to solve the above technical problems, the present invention provides a high-efficiency plasma purification device, including a grid array unit and a circuit module. Each grid array unit includes three ion tubes arranged in a line, and a parallel spacing is provided between two adjacent ion tubes. The ion tube includes an outer electrode, a dielectric and an inner electrode from the outside to the inside, and the dielectric isolates the inner electrode from the outer electrode. The inner electrode and the outer electrode of the same ion tube have opposite polarities, the inner electrodes of two adjacent ion tubes have opposite polarities, and the outer electrodes of two adjacent ion tubes have opposite polarities. The outer electrode is provided with a plurality of uniform and dense openings, and the inner electrode is provided with a vacant part. The current of the power supply passes through the high frequency and high voltage generated by the circuit module and then is connected to the inner electrode and the outer electrode.

[0009] Preferably, it further comprises a bracket, wherein the bracket is divided into a first half cover and a second half cover, and the first half cover and the second half cover are assembled to limit and fix the ion tube.

[0010] Preferably, the outer electrode is a grid-type cylindrical tube.

[0011] Preferably, the outer electrode is in the shape of a cylindrical tube with a plurality of uniform and dense through holes.

[0012] Preferably, the shape of the inner electrode of the ion tube with the grid array unit in the middle position is that a part is cut off at one end of the cylindrical tube, and the cut area is 1 / 2 along the radial direction of the cylindrical tube, and the cut length is 2 / 3 of the axial direction of the cylindrical tube.

[0013] Preferably, the shape of the inner electrode of the ion tube in the middle position of the grid array unit is a groove cut out on the cylindrical tube, the cutting depth of the groove is consistent with the axial length of the cylindrical tube, and both ends of the groove pass through the curved surface of the cylindrical tube.

[0014] Preferably, the shape of the inner electrode of the ion tube in the middle position of the grid array unit is that a part is cut off radially at both ends of the cylindrical tube, and the cutting length at each end is 1 / 6 of the axial length of the cylindrical tube.

[0015] An electrode combination process for a high-efficiency plasma purification device comprises the following steps:

[0016] ① The outer wall surface of the aluminum tube is subjected to cold extrusion process;

[0017] ② The aluminum tube obtained in step ① is pickled and cleaned;

[0018] ③ Performing micro-arc oxidation processing: oxidizing the surface of the aluminum tube obtained by the treatment of step ① and step ② in sequence, and oxidizing the outer surface of the aluminum tube to obtain granular aluminum oxide material; during the oxidation process, the aluminum tube is subjected to multi-stage voltage control, gradually increasing from 3V to 120V, and the time is gradually increased from 2 minutes to 480 minutes, and the temperature is controlled at different stages (between 0-60 degrees);

[0019] ④ Keep it at room temperature for 1-5 hours, then seal it, and then sinter it at a high temperature of 400-650 degrees. Finally, it can be used as a combination of dielectric and internal electrode;

[0020] ⑤ Then apply the material obtained in step ④ to the ion tubes on both sides of each grid array unit, and the ion tube used in the middle needs to be processed and cut, cut off a part at one end, and the cutting area is 1 / 2 along the radial direction of the aluminum tube, and the cutting length is 2 / 3 of the axial direction, or cut a groove on the aluminum tube, the cutting depth of the groove is consistent with the axial length of the aluminum tube, and both ends of the groove pass through the curved surface of the aluminum tube.

[0021] The technical solution of the present invention has the following advantages:

[0022] The present invention provides a high-efficiency plasma purification device, in which the ion tubes on both sides of each grid array unit respectively perform high-voltage dielectric barrier discharge to generate plasma, and the middle ion tube simultaneously has high-voltage dielectric barrier discharge and avalanche-like ionization phenomenon, generating a large amount of plasma, and an alternating electric field is generated between two adjacent ion tubes, which also generates a large amount of plasma. The present invention is usually installed at the air outlet of the air conditioner. When the air coming out of the air outlet of the air conditioner passes between two adjacent ion tubes, it is simultaneously acted on by three plasmas, the first plasma being the plasma generated by the high-voltage dielectric barrier discharge of each of the two ion tubes, the second plasma being the plasma generated by the alternating electric field between the two adjacent ion tubes, and the third plasma being the plasma generated by the avalanche-like ionization phenomenon of the middle ion tube, so the air coming out of the air conditioner can be effectively sterilized and purified.

[0023] At the same time, when the air from the air conditioner outlet passes between two adjacent ion tubes, it will also bring the plasma generated by the alternating electric field into the indoor air, which also has a disinfecting and purifying effect on the indoor air. In addition, the high-voltage dielectric barrier discharge generated by each ion tube itself will also have a certain disinfecting and purifying effect on the indoor air.

[0024] The present invention makes up for the problem of low efficiency of plasma generated by the existing plasma air purification device using corona discharge technology. The amount of plasma generated by the present invention is greatly improved, and a large amount of plasma can be generated to achieve the effect of rapid sterilization, disinfection and purification of the air.

[0025] The present invention also provides a processing technology for a dielectric and inner electrode assembly of a high-efficiency plasma purification device, which greatly improves the speed of obtaining aluminum oxide by anodizing and micro-arc oxidation using aluminum as a substrate, generates a dielectric using an inner electrode as a substrate, and combines the two into one, omitting the assembly step, thereby improving the overall production efficiency of the present invention. In addition, while ensuring the preparation speed, the scrap rate of the material can be controlled at a relatively low level. In addition, the generated aluminum oxide surface layer has small gaps and high density, thereby improving the dielectric barrier discharge effect of the ion tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A discharge schematic diagram of an existing plasma air purification device;

[0028] Figure 2 It is a schematic diagram of the discharge of the first type of inner and outer electrodes in the positive and negative form of the ion tube of the present invention (with one grid array unit);

[0029] Figure 3 A schematic diagram of the discharge of the second type of inner and outer electrodes of the ion tube of the present invention in the positive and negative form (with one grid array unit);

[0030] Figure 4 A schematic diagram of the discharge of the positive and negative forms of the inner and outer electrodes of the ion tube of the present invention (with two grid array units);

[0031] Figure 5 This is a schematic diagram of the overall structure of a high-efficiency plasma purification device of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the support of the present invention;

[0033] Figure 7 This is a schematic structural diagram of a high-efficiency plasma purification device without a support frame according to the present invention;

[0034] Figure 8 is a cross-sectional view of the ion tube of the present invention;

[0035] Fig. 9 is a schematic diagram of a first embodiment of an inner electrode of the present invention;

[0036] Fig.10 is a schematic diagram of a second embodiment of an inner electrode of the present invention;

[0037] Fig.11 is a schematic diagram of a third embodiment of an inner electrode of the present invention;

[0038] Fig.12 is a schematic diagram of a first embodiment of an external electrode of the present invention;

[0039] Fig.13 is a schematic diagram of a second embodiment of an external electrode of the present invention;

[0040] Fig.14 This is a schematic diagram of the present invention without the bracket and circuit module;

[0041] Fig.15 For the present invention Fig.14 An enlarged schematic diagram of part A.

[0042] Explanation of the reference numerals: 100, grid array unit; 200, circuit module; 110, ion tube; 111, inner electrode; 112, outer electrode; 113, dielectric; 300, bracket; 310, first half cover; 320, second half cover; 311, first half frame; 312, first half limiting frame; 313, first half shrapnel cover; 321, second half frame; 322, second half limiting frame; 323, second half shrapnel cover; 330, circular hole; 400, first rubber frame; 500, second rubber frame; 600, shrapnel. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] The present invention provides a high-efficiency plasma purification device, which comprises at least one grid array unit 100 and a circuit module 200. Each grid array unit 100 comprises at least three ion tubes 110 arranged in a line. A parallel spacing is provided between two adjacent ion tubes 110. Each ion tube 110 comprises an outer electrode 112, a dielectric 113 and an inner electrode 111 from the outside to the inside. The dielectric 113 isolates the inner electrode 111 from the outer electrode 112. The inner electrode 111 and the outer electrode 112 of the same ion tube 110 have opposite polarities. The inner electrodes 111 of two adjacent ion tubes 110 have opposite polarities. The outer electrodes 112 of two adjacent ion tubes 110 have opposite polarities. A plurality of uniform and dense openings are provided on the outer electrode 112. A vacant portion is provided at a portion corresponding to the position of the inner electrode 111 and the outer electrode 112. The current of a power supply passes through the circuit module 200 to generate a high-frequency high voltage and then is connected to the inner electrode 111 and the outer electrode 112.

[0048] The shape of the outer electrode 112 can be a grid-type cylindrical cylinder, whose grids are the openings of the outer electrode 112 , or a cylindrical cylinder with a plurality of uniform and dense through holes, whose through holes are the openings of the outer electrode 112 .

[0049] There are three embodiments of the shape of the inner electrode 111 of the ion tube 110 in the middle position of the grid array unit 100:

[0050] Embodiment 1: A portion is cut off at one end of a cylindrical tube, and the cut area is 1 / 2 along the radial direction of the cylindrical tube, and the cut length is 2 / 3 along the axial direction of the cylindrical tube.

[0051] Embodiment 2: A groove is cut out on a cylindrical tube, the cutting depth of the groove is consistent with the axial length of the cylindrical tube, and both ends of the groove penetrate the curved surface of the cylindrical tube.

[0052] Embodiment 3: A portion is radially cut off at both ends of the cylinder, and the cut length at each end is 1 / 6 of the length of the cylinder axis.

[0053] (1) The inner electrodes 111 of the middle ion tube 110 and the ion tubes 110 on both sides are intact

[0054] Serial number power supply Current Positive ions Negative ions 20S080 6V / DC 0.13 390 -370 20S080 7V / DC 0.32 460 -450

[0055] (2) ① The inner electrode 111 of the intermediate ion tube 110 is cut axially, with the cut facing the measuring instrument / ② The cut facing the fan

[0056] Serial number power supply Current Positive ions Negative ions 20S080① 6V / DC 0.21A 588 -557 20S080① 7V / DC 0.40A 693 -676 20S080② 6V / DC 0.19A 447 -430 20S080② 7V / DC 0.33A 579 -545

[0057] (3) The inner electrode 111 of the middle ion tube 110 is cut transversely, and the two inner electrodes 111 on both sides are intact

[0058] Serial number power supply Current Positive ions Negative ions 20S080 6V / DC 0.21A 542 -414 20S080 7V / DC 0.40A 743 -540

[0059] Under the same voltage, the amount of plasma produced by the tube with half-cut inner electrode is higher than the amount of plasma produced by the three ion tubes with complete inner electrodes 111 .

[0060] In the present invention, since the inner electrode 111 of the intermediate ion tube 110 has a vacant part, avalanche-like ionization phenomenon will occur when high frequency and high voltage are simultaneously passed through the inner electrode 111 and the outer electrode 112 of the intermediate ion tube 110, thereby greatly increasing the amount of generated plasma. The specific principle is as follows:

[0061] The first embodiment of the inner electrode 111 is as follows: the inner electrode 111 of the intermediate ion tube 110 is cut off by 1 / 2 in the radial direction and 2 / 3 in the axial direction compared to the outer electrode 112, so that the inner electrode 111 forms a vacant portion relative to a portion of the outer electrode 112. When the inner and outer electrodes are connected to a high-frequency high-voltage power supply, due to the asymmetric and uneven geometric configurations of the two, under the action of the electric field, the cut edge of the inner electrode 111 radiates and discharges in a linear manner along the axial direction of the outer electrode 112, and an avalanche-like ionization phenomenon that is more intense than the discharge of the overlapping surfaces of the two occurs, which makes up for the defect of low plasma generation using the corona discharge principle and provides conditions for the large-scale formation of plasma.

[0062] The principle of the second embodiment of the inner electrode 111: the inner electrode 111 of the intermediate ion tube 110 cuts out a groove compared to the outer electrode 112, the cutting depth of the groove is consistent with the axial length of the outer electrode 112, and both ends of the groove penetrate the curved surface of the inner electrode 111, so that the inner electrode 111 forms a vacant part relative to a part of the outer electrode 112. When the inner and outer electrodes 112 are connected to a high-frequency high-voltage power supply, due to the asymmetric and uneven geometric configurations of the two, under the action of the electric field, the two cut edges of the inner electrode 111 that are separated from each other radiate and discharge in a linear manner along the two opposite radial directions of the outer electrode 112, and an avalanche-like ionization phenomenon that is more intense than the discharge of the overlapping surfaces of the two occurs, which makes up for the defect of low plasma generation using the corona discharge principle and provides conditions for the large-scale formation of plasma.

[0063] The third embodiment of the inner electrode 111 is as follows: the axial length of the inner electrode 111 of the intermediate ion tube 110 is cut off by 1 / 3 compared to the axial length of the outer electrode 112, and the inner electrode 111 is located in the middle of the axial direction of the ion tube 110, so that the inner electrode 111 forms a vacant part relative to both ends of the outer electrode 112. When the inner and outer electrodes 112 are connected to a high-frequency high-voltage power supply, due to the asymmetric and uneven geometric configurations of the two, under the action of the electric field, the edges of the two ends of the inner electrode 111 respectively radiate linear discharge along the two opposite axial directions of the outer electrode 112, and an avalanche-like ionization phenomenon more intense than the discharge of the overlapping surfaces of the two occurs, which makes up for the defect of low efficiency of generating plasma using the corona discharge principle and provides conditions for the large-scale formation of plasma.

[0064] The ion tubes 110 on the left and right sides of the grid array unit 100 are high-frequency high-voltage dielectric barrier discharges. A high-frequency high voltage is applied to the ion tubes 110, so that the inner electrode 111 and the outer electrode 112 generate corona discharge (such as Figure 2 The overlapped part of the inner electrode 111 and the outer electrode 112 of the middle ion tube 110 is a high-frequency high-voltage dielectric barrier discharge (such as Figure 2 (b) and the missing part of the inner electrode 111 will undergo avalanche-like ionization. Figure 2 (b) indicates the outward arrow, so the middle ion tube 110 has both corona discharge and avalanche ionization. The left and right ion tubes 110 each use corona discharge, and the middle ion tube 110 has both corona discharge and avalanche ionization. Between two adjacent ion tubes 110, because of the voltage relationship applied by the alternating power supply itself, the outer electrodes 112 of the two adjacent ion tubes 110 form a positive and negative opposite relationship, which can generate a micro discharge at the tip. ( Figure 2 110).

[0065] The ion tubes 110 on both sides of each grid array unit 100 respectively perform high-voltage dielectric barrier discharge to generate plasma, while the middle ion tube 110 simultaneously has high-voltage dielectric barrier discharge and avalanche-like ionization phenomenon, generating a large amount of plasma, and the adjacent two ion tubes 110 generate an alternating electric field, which also generates a large amount of plasma. The present invention is usually installed at the air outlet of the air conditioner. When the air coming out of the air outlet of the air conditioner passes between the two adjacent ion tubes 110, it is simultaneously acted on by three plasmas, the first plasma generated by the high-voltage dielectric barrier discharge of the two ion tubes 110, the second plasma generated by the alternating electric field generated by the two adjacent ion tubes 110, and the third plasma generated by the avalanche-like ionization phenomenon of the middle ion tube 110, so the air coming out of the air conditioner can be well sterilized, disinfected and purified. At the same time, when the air coming out of the air outlet of the air conditioner passes between the two adjacent ion tubes 110, it will also bring the plasma generated by the alternating electric field into the indoor air, which also has a disinfection and purification effect on the indoor air. In addition, the high-voltage dielectric barrier discharge generated by each ion tube itself will also have a certain disinfection and purification effect on the indoor air.

[0066] The present invention also includes a bracket 300, which is divided into a first half cover 310 and a second half cover 320. After the first half cover 310 and the second half cover 320 are assembled, the ion tubes 110 are limited and fixed, so that the three ion tubes 110 are always arranged in a line, and the adjacent two ion tubes 110 have the same spacing, and the spacing value remains unchanged.

[0067] The first half cover 310 includes a first half frame 311, a first half limiting frame 312 and a first half elastic cover 313. A plurality of first half limiting frames 312 are provided in the vertical direction of the first half cover 310. The first half elastic cover 313 is fixed to one end of the first half cover 310. The second half cover 320 includes a second half frame 321, a second half limiting frame 322 and a second half elastic cover 323. A plurality of second half limiting frames 322 are provided in the vertical direction of the second half cover 320. The second half elastic cover 323 is fixed to the bottom of the second half cover 320. The first half frame 311 and the second half frame 321 form a complete frame. A semicircular groove is provided on the first half limiting frame 312, and a semicircular groove is provided on the second half limiting frame 322. The semicircular groove on the first limiting frame 312 and the semicircular groove on the second half limiting frame 322 are assembled into a circular hole 330. The ion tube 110 is fixed in the circular hole 330. The second half shrapnel cover 323 and the second half shrapnel cover 323 are assembled into a complete shrapnel cover.

[0068] The present invention further includes a first rubber frame 400 and a second rubber frame 500. The first rubber frame 400 can limit one end of all ion tubes 110 of the grid array unit 100, and the second rubber frame 500 can limit the other end of all ion tubes 110 of the grid array unit 100. Two springs 600 are respectively limited on both sides of the spring cover, close to the ion tubes 110 on both sides, and the tops of the two springs 600 are respectively in contact with the second rubber frame 500, and the bottoms of the two springs 600 are respectively connected to a wire.

[0069] Preferably, the center distance between two adjacent ion tubes 110 is 12 mm-17 mm.

[0070] An electrode combination process for a high-efficiency plasma purification device comprises the following steps:

[0071] ① Treat the outer wall surface of the aluminum tube with cold extrusion process to improve the density of the aluminum tube surface;

[0072] ② The aluminum tube obtained in step ① is pickled and cleaned;

[0073] ③ Perform micro-arc oxidation processing: oxidize the surface of the aluminum tube obtained by the treatment of step ① and step ② in sequence, and oxidize the outer surface of the aluminum tube to obtain granular aluminum oxide ceramic material; during the oxidation process, the aluminum tube is subjected to multi-stage voltage control, gradually rising from 3V to 120V, and the time is gradually increased from 2 minutes to 480 minutes, and the temperature is controlled (between 0-60 degrees) at different voltage control stages; from the outer surface to the inside of the aluminum tube, the speed of generating aluminum oxide is getting slower and slower, so the aluminum tube is subjected to multi-stage voltage control from the outer surface to the inside, so that the voltage value of each layer of the aluminum tube is different, and the time of each voltage control is also gradually increased from 2 minutes to 480 minutes, and the voltage value is proportional to the time value. Controlling different temperature values ​​at different voltage control stages can prevent the aluminum tube from being damaged due to excessive temperature, and make the generated aluminum oxide particles firmly attached to the surface of the aluminum tube;

[0074] ④ Keep at room temperature for 1-5 hours, then seal the holes, and then sinter at high temperature of 400-650 degrees. Finally, it can be used as a combination of dielectric 113 and internal electrode 111. Because the arc in the micro-arc oxidation process melts the ceramic layer formed on the surface, a large number of micron-sized micropores are formed under the joint action of the gas formed on the surface of the ceramic layer. These micropores exist in large quantities in the ceramic layer, and some of them are connected to the metal matrix, making it easy for liquid to pass through. The micropores reach the metal matrix, causing metal corrosion, and severe cases will cause the ceramic layer to crack and fall off, so sealing treatment is required.

[0075] ⑤ Then apply the material obtained in step ④ to the ion tubes on both sides of each grid array unit, and the ion tube used in the middle needs to be processed and cut, cutting off a part at one end, and the cutting area is 1 / 2 along the radial direction of the aluminum tube, and the cutting length is 2 / 3 along the axial direction; or cut a groove in the aluminum tube, the cutting depth of the groove is consistent with the axial length of the aluminum tube, and both ends of the groove pass through the curved surface of the aluminum tube.

[0076] The effect of the distance between the three ion tubes 110 on the number of plasma is as follows:

[0077] By making rubber frames of different specifications, the center distance between the circular holes 330 thereon is controlled, thereby controlling the center distance between the three ion tubes 110): reduced by 0.5mm, reduced by 1mm; normal (12.5mm); increased by 0.5mm, increased by 1mm, increased by 3.5mm, increased by 4.5mm.

[0078]

[0079]

[0080]

[0081] By controlling the distance between the three ion tubes 110, the obtained plasma quantity comparison test found that under the same three ion tubes 110 and the same circuit, the amount of positive and negative ions generated will be different if the distance between the ion tubes 110 is different. The smaller the distance between the ion tubes 110, the lower the positive and negative ion content; the larger the distance, the higher the positive and negative ion content. Among them, when the distance is 17mm, the ion quantity reaches the maximum.

[0082] When the present invention is working, heat is generated inside and the heat-generating airflow will rise. The first rubber frame 500 has an opening 510. At this time, the external air first enters from the opening 510 and then enters from the gap between the inner electrode 111 and the dielectric 113. Since a part of the inner electrode 111 is cut off, the external air will also enter the center of the inner electrode 111 from the vacant part and rise, and finally merge with the surrounding air. When the air enters from the outside of the inner electrode 111, the ions generated between the inner electrode 111 and the outer electrode 112 will also be taken away by the air, so that the ion content in the air is further increased.

[0083] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A high-efficiency plasma purification device, comprising an ion tube (110) and a circuit module (200), characterized in that: The invention comprises at least three ion tubes (110) arranged in a line, wherein three adjacent ion tubes (110) are combined into a grid array unit (100), and a parallel spacing is provided between two adjacent ion tubes (110). The ion tube (110) comprises an outer electrode (112), a dielectric (113) and an inner electrode (111) from the outside to the inside, wherein the dielectric (113) isolates the inner electrode (111) from the outer electrode (112), and the inner electrode (111) of the same ion tube (110) is connected to the inner electrode (111). The inner electrode (111) and the outer electrode (112) have opposite polarities, the inner electrodes (111) of two adjacent ion tubes (110) have opposite polarities, the outer electrodes (112) of two adjacent ion tubes (110) have opposite polarities, the outer electrode (112) is provided with a plurality of uniform and dense openings, the inner electrode (111) is provided with a vacant portion, and the current of the power supply passes through the circuit module (200) to generate high frequency and high voltage, which is then connected to the inner electrode (111) and the outer electrode (112).

2. A high-efficiency plasma purification device according to claim 1, characterized in that: It also comprises a bracket (300), wherein the bracket (300) is divided into a first half cover (310) and a second half cover (320), and the first half cover (310) and the second half cover (320) are assembled to limit and fix the ion tube (110).

3. A high-efficiency plasma purification device according to claim 2, characterized in that: The outer electrode (112) is a mesh-type cylindrical tube.

4. A high-efficiency plasma purification device according to claim 3, characterized in that: The outer electrode (112) is in the shape of a cylindrical tube with a plurality of uniform and dense through holes.

5. A high-efficiency plasma purification device according to claim 4, characterized in that: The shape of the inner electrode (111) of the ion tube (110) in the middle position of the grid array unit (100) is that a part is cut off at one end of the cylindrical tube, and the cut area is 1 / 2 along the radial direction of the cylindrical tube, and the cut length is 2 / 3 of the axial direction of the cylindrical tube.

6. A high-efficiency plasma purification device according to claim 4, characterized in that: The shape of the inner electrode (111) of the ion tube (110) at the middle position of the grid array unit (100) is a groove cut out of a cylindrical tube, the cutting depth of the groove is consistent with the axial length of the cylindrical tube, and both ends of the groove penetrate the curved surface of the cylindrical tube.

7. A high-efficiency plasma purification device according to claim 4, characterized in that: The shape of the inner electrode (111) of the ion tube (110) at the middle position of the grid array unit (100) is that a part is cut off radially at both ends of the cylindrical tube, and the cutting length at each end is 1 / 6 of the axial length of the cylindrical tube.

8. The electrode assembly method of a high-efficiency plasma purification device according to any one of claims 5 to 7, comprising the following steps: ① The outer wall surface of the aluminum tube is subjected to cold extrusion process; ② The aluminum tube obtained in step ① is pickled and cleaned; ③ Performing micro-arc oxidation processing: oxidizing the surface of the aluminum tube obtained by the treatment of step ① and step ② in sequence, and oxidizing the outer surface of the aluminum tube to obtain a granular aluminum oxide material; during the oxidation process, the aluminum tube is subjected to multi-stage voltage control, gradually increasing from 3V to 120V, and the time is gradually increased from 2 minutes to 480 minutes, and the temperature is controlled at different stages, and the temperature range is between 0-60 degrees; ④ Maintaining at room temperature for 1-5 hours, then performing a pore sealing treatment, and then performing a high temperature sintering at 400-650 degrees, and finally being used as a combination of a dielectric (113) and an inner electrode (111); ⑤ Then apply the material obtained in step ④ to the ion tubes on both sides of each grid array unit, and the ion tube used in the middle needs to be processed and cut, cut off a part at one end, and the cutting area is 1 / 2 along the radial direction of the aluminum tube, and the cutting length is 2 / 3 of the axial direction, or cut a groove on the aluminum tube, the cutting depth of the groove is consistent with the axial length of the aluminum tube, and both ends of the groove pass through the curved surface of the aluminum tube.

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