Plasma discharge device and air purification apparatus

Abstract

The application relates to the technical field of air purification, and discloses a plasma discharge device and air purification equipment. The plasma discharge device comprises an electrode structure, a current storage shell arranged outside the electrode structure, an air inlet and an air outlet arranged at two ends of the current storage shell, and the current storage shell has a current storage cavity. Purified air enters the current storage cavity through the air inlet, flows through the electrode structure along the length direction of the electrode structure, and is discharged through the air outlet. The cross-sectional area of the air inlet is smaller than the cross-sectional area of the current storage cavity. The current storage shell can bind high-energy particles and active substances in a small space, improve the concentration of high-energy particles and active substances, and control the airflow to flow through the electrode structure along the length direction of the electrode structure, so that the airflow contacts the high-concentration high-energy particles and active substances for a longer time. In addition, reducing the area of the air inlet can further realize current storage and increase the action time of polluted air and high-energy particles and active substances.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purification, in particular to a plasma discharge device and an air purification equipment. BACKGROUND

[0002] The principle of plasma purification is to generate plasma by air discharge, and a large amount of high-energy particles, active substances and other components in the plasma can diffuse into space, which has the effect of sterilization and decomposition of gaseous pollutants. The efficiency of plasma sterilization and decomposition of gaseous pollutants is closely related to the concentration of high-energy particles and active substances.

[0003] However, most of the plasma discharge devices in the prior art are vertically through the electrode structure, and the airflow is in contact with the high-energy particles and active substances in the high-concentration area near the electrode structure for a short time when passing through the electrode structure vertically. Since the reaction needs a certain time, the airflow has not fully reacted with the plasma before passing through the high-concentration area, resulting in low reaction efficiency and poor purification effect. SUMMARY

[0004] Therefore, the present application provides a plasma discharge device and an air purification equipment to solve the problem of short contact time between airflow and plasma in the prior art.

[0005] In a first aspect, the present application provides a plasma discharge device, which comprises an electrode structure and a flow storage shell, an air inlet and an air outlet, wherein the electrode structure is used to generate plasma; the flow storage shell is arranged outside the electrode structure, and the flow storage shell has a flow storage cavity matched with the shape of the electrode structure; the air inlet and the air outlet are arranged at both ends of the flow storage shell, and the air to be purified enters the flow storage cavity through the air inlet and flows through the electrode structure along the length direction of the electrode structure, and then is discharged through the air outlet; wherein the cross-sectional area of the air inlet is smaller than the cross-sectional area of the flow storage cavity.

[0006] Beneficial effects: the flow storage shell arranged outside the electrode structure can confine the high-energy particles, active substances and other components generated in the plasma in a small space. Due to the arrangement of the closed flow storage cavity, the diffusion distance of the high-energy particles and active substances is limited, thereby increasing the average concentration of the high-energy particles and active substances, so as to form a flow storage cavity with high concentration of high-energy particles and active substances, which is beneficial to improve the reaction efficiency.

[0007] In addition, the air flow is changed from vertically passing through the electrode structure to parallelly passing through the electrode structure along the length direction of the electrode structure, the air inlet and the air outlet are arranged at two ends of the current storage shell, and the air flow direction is consistent with the length direction of the electrode structure. Since the vertical distance of each point in the parallel position to the electrode structure is equal, the air flow can always be in contact with the high-energy particles and active substances in the high-concentration area of the outer periphery of the electrode structure, and the air flow is in contact with the high-concentration plasma for a longer time compared with the vertical passing through the electrode structure, so that the pollutants in the air can be fully contacted and reacted with the high-concentration plasma, and the reaction efficiency and the purification effect are improved. The problems of low reaction efficiency and poor purification effect caused by the air flow vertically passing through the electrode structure and the air flow passing through the high-concentration area without sufficient reaction of the plasma are effectively solved.

[0008] In addition, by controlling the cross-sectional area of the air inlet to be smaller than the cross-sectional area of the current storage cavity, the air flow is generated in the current storage cavity, and the residence time of the air flow in the current storage cavity is controlled, so that the current storage is further realized, and under the condition that the air volume is unchanged, the action time of the polluted air, the plasma, the high-energy particles and the active substances can be further increased, and the efficiency of the plasma discharge device in sterilization, disinfection and decomposition of gaseous pollutants is improved.

[0009] In an optional embodiment, the flow direction of the air to be purified in the current storage cavity is consistent with the length direction of the electrode structure.

[0010] Beneficial effects: by adopting the above design, the gaseous pollutants in the air flow can pass through the electrode structure along the longest direction of the electrode structure, so that the contact time of the pollutants in the air flow with the plasma in the current storage cavity is the longest, which is beneficial to achieving the purpose of maximum single purification efficiency in a small space.

[0011] In an optional embodiment, the ratio of the cross-sectional area of the air inlet to the cross-sectional area of the current storage cavity is between 10% and 90%.

[0012] Beneficial effects: by reducing the cross-sectional area of the air inlet, the ratio of the cross-sectional area of the air inlet to the cross-sectional area of the current storage cavity is limited to between 10% and 90%, so that the size of the air inlet and the volume ratio of the air inlet to the current storage cavity are reduced. After the air flow enters the current storage cavity, the relative residence time of the air flow and the pollutants is lengthened due to the turbulence or dispersion of the air flow, so that the pollutants can be fully reacted with the plasma.

[0013] In an optional embodiment, the current storage shell comprises a shell body and an air inlet portion arranged at one end of the shell body, the inner diameter of the air inlet portion is smaller than the inner diameter of the shell body, and the end of the air inlet portion away from the shell body is open to form the air inlet.

[0014] Beneficial effects: By setting the inner diameter of the reduced air inlet part, the purified air entering the larger size shell body from the size-reduced air inlet part will diffuse to the entire flow storage cavity under the action of pressure difference, forming turbulent flow and increasing the residence time of the gas in the flow storage cavity.

[0015] In an alternative embodiment, the plasma discharge device further comprises a turbulence structure arranged in the flow storage cavity and adapted to disperse the airflow entering the flow storage cavity and generate turbulent flow in the flow storage cavity.

[0016] Beneficial effects: By setting the turbulence structure, not only can local turbulence be achieved, the gas flow rate can be reduced, and the reaction efficiency can be improved, but also the uniform distribution of airflow on the entire cross section of the flow storage cavity can be achieved, which is beneficial to prolonging the residence time of the airflow in the flow storage cavity.

[0017] In an alternative embodiment, the turbulence structure comprises a mixed turbulence fin fixedly arranged in the flow storage cavity and located near the air inlet, and a plurality of turbulent flow holes are arranged on the mixed turbulence fin.

[0018] Beneficial effects: By setting the mixed turbulence fin, the gas is bent in a local space to generate turbulent flow, so that the active substances in the space and the pollutants in the airflow can be fully mixed multiple times, and repeated mixing is beneficial to the chemical reaction, thereby effectively improving the air purification efficiency.

[0019] In an alternative embodiment, the air inlet and the air outlet are staggered in the length direction of the electrode structure.

[0020] Beneficial effects: By horizontally staggering the air inlet and the air outlet, the airflow organization flow state, direction and residence time can be controlled, the residence time of the air to be purified in the flow storage cavity can be increased, the polluted gas can be fully contacted with the plasma for reaction, and the reaction efficiency of the polluted gas and the plasma can be further improved, thereby effectively avoiding the problem that in related technologies, the air inlet and the air outlet are arranged in opposition, the air is straight in and straight out, resulting in short residence time of the air to be purified and insufficient reaction.

[0021] In an alternative embodiment, a purification channel is formed in the flow storage cavity for the airflow to pass through the electrode structure in parallel, and the purification channel is located on the outer peripheral side of the electrode structure and parallel to the length direction of the electrode structure.

[0022] Beneficial effects: When the air flows through the purification channel, it can flow through the electrode structure in a direction parallel to the electrode structure, and the airflow direction is parallel to the plane where the electrode structure is located. Since the distance from each point on the parallel position to the electrode structure is the same, the airflow can always be in contact with the same concentration of high-energy particles and active substances, and the contact time is related to the airflow speed and the electrode length.

[0023] In an alternative embodiment, the air inlet direction of the air inlet is parallel to the length direction of the electrode structure, and the air outlet direction of the air outlet forms a set angle with the air inlet direction of the air inlet.

[0024] Beneficial effects: By adopting the above design, the air entering from the air inlet can directly flow along the length direction of the electrode structure, and the air inlet does not need to be reversed, and the air outlet needs to be reversed and discharged from the air outlet, avoiding direct inlet and direct outlet, and the problem that the high-energy particles and active substances in the flow storage cavity flow out together with the air, resulting in a decrease in the concentration of high-energy particles and active substances in the flow storage cavity.

[0025] In an alternative embodiment, the electrode structure includes multiple groups of electrode units arranged side by side, and the arrangement direction of the multiple groups of electrode units is perpendicular to the air flow direction.

[0026] Beneficial effects: By the above design, the air can flow through all the electrode units, enhancing the purification effect on the pollutants in the air.

[0027] In an alternative embodiment, the electrode structure divides the flow storage cavity into two interconnected regions; one region is a reaction zone connected to the air inlet, and the other region is a compensation zone connected to the air outlet; after the plasma is generated, the high-energy particles and active substances in the plasma diffuse throughout the flow storage cavity, and when the high-energy particles and active substances in the reaction zone react with the pollutants in the air and are consumed, the high-energy particles and active substances in the compensation zone can automatically enter the reaction zone under the action of the concentration difference to compensate for the consumed high-energy particles and active substances in the reaction zone.

[0028] Beneficial effects: When the high-energy particles and active substances in the reaction zone are consumed due to the reaction, the compensation zone is not consumed, and a high-concentration region and a relatively low-concentration region are formed in the entire flow storage cavity. At this time, the high-energy particles and active substances will diffuse to the reaction zone through the concentration gradient, compensating for the consumed high-energy particles and active substances in the reaction zone, so that the reaction zone is always in a high-concentration state, thereby improving the reaction efficiency of the plasma in the reaction zone and the air pollutants.

[0029] In an alternative embodiment, the electrode structure is a sheet electrode, and the reaction zone and the compensation zone are distributed on the left and right sides of the electrode structure.

[0030] In an alternative embodiment, the air inlet is formed in the bottom wall of the flow storage shell of the reaction zone, and the air outlet is formed in the top of the side wall of the flow storage shell of the compensation zone.

[0031] Beneficial effects: through air flow organization analysis, after the above setting of the air inlet and the air outlet, the compensation area has almost no air flow passing through, and high-energy particles and active substances are still generated, so when the reaction area is consumed by the reaction of high-energy particles and active substances, the concentration of high-energy particles and active substances in the compensation area is higher than that in the reaction area, and the high-energy particles and active substances in the compensation area are automatically compensated to the reaction area, so that the average concentration of high-energy particles and active substances in the reaction area is higher, and in addition, through the turning setting of the air outlet, the concentration of high-energy particles and active substances can be further locked.

[0032] In an alternative embodiment, the electrode structure comprises a ring-shaped electrode body, the reaction area is distributed on the outside of the ring-shaped electrode body, and the compensation area is distributed on the inside of the ring-shaped electrode body.

[0033] Beneficial effects: the electrode structure is arranged in a ring shape, and the current storage shell is also arranged in a ring shape, so that the entire plasma discharge device can adapt to the general square purifier overall structure, improving the adaptability and practicality of the plasma discharge device.

[0034] In an alternative embodiment, the reaction area and the compensation area are both ring-shaped cavity structures.

[0035] Beneficial effects: by designing the reaction area and the compensation area in a ring shape, the volume of the reaction area can be maximized by adjusting the diameter of the side wall of the reaction area and the side wall of the compensation area. When the active substances in the reaction area are consumed, the air flow passing through the reaction area will also sweep the active substance concentration in the reaction area to a certain extent. The compensation area can improve the concentration of active substances in the reaction area without increasing the structural complexity, and ensure that the bacteria odor and other pollutants can be completely decomposed.

[0036] In an alternative embodiment, the current storage shell has a ring-shaped shell body matched with the shape of the electrode body, the air inlet is arranged on the bottom wall or the inner circumferential side of the bottom of the shell body, and the air outlet is arranged on the inner circumferential side of the top of the shell body.

[0037] Beneficial effects: by using the above design, the air flow needs to be turned and discharged through the air outlet after flowing through the reaction area, further locking the concentration of high-energy particles and active substances in the storage area.

[0038] In a second aspect, the application also provides an air purification device comprising the plasma discharge device of any of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0040] Figure 1 Structure diagram of prior art in which gas flow passes through single electrode array vertically;

[0041] Figure 2 Structure diagram of prior art in which gas flow passes through multiple electrode arrays vertically;

[0042] Figure 3 Structure diagram of one embodiment of the plasma discharge device in the embodiment of the present application;

[0043] Figure 4 Structure diagram of the electrode structure composed of two electrode units in the embodiment of the present application;

[0044] Figure 5 Structure diagram of the embodiment of the present application in which gas flow passes through the electrode array composed of multiple electrode units in parallel;

[0045] Figure 6 Structure diagram of Figure 3 lateral section view;

[0046] Figure 7 Structure diagram of one embodiment of the embodiment of the present application in which the flow storage shell is provided with a turbulence structure;

[0047] Figure 8 Structure diagram of one embodiment of the embodiment of the present application in which the flow storage shell is provided with an air inlet part;

[0048] Figure 9 Structure diagram of the flow storage shell in Figure 8 with an additional turbulence structure;

[0049] Figure 10 Structure diagram of one embodiment of the embodiment of the present application in which the flow storage shell is provided with a reaction zone and a compensation zone;

[0050] Figure 11 Structure diagram of another embodiment of the embodiment of the present application in which the flow storage shell is provided with a reaction zone and a compensation zone;

[0051] Figure 12 Structure diagram of Figure 11 with the side wall of the compensation zone removed;

[0052] Figure 13A simulation diagram of the plasma concentration distribution around a filament electrode in the related art;

[0053] Figure 14 A simulation diagram of the plasma concentration distribution around a filament electrode array in the related art.

[0054] Explanation of reference signs:

[0055] 10, electrode structure; 101, high concentration area; 11, electrode body; 12, blocking plate;

[0056] 20, storage shell; 201, storage cavity; 2010, purification channel; 2011, reaction area; 2012, compensation area; 202, air inlet; 203, air outlet; 21, shell body; 211, reaction area side wall; 212, compensation area side wall; 213, bottom wall; 214, top wall; 22, air inlet part;

[0057] 30, mixed spoiler. DETAILED DESCRIPTION

[0058] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0059] As shown in Figure 1 , the air flow in the related art generally passes through the electrode structure 10 vertically, and the high concentration area 101 of high-energy particles and active substances is generally near the electrode plane. According to the spatial distribution characteristics analysis of high-energy particles and active substances, the concentration of high-energy particles and active substances decreases rapidly after a distance from the electrode plane, and basically has no effect on sterilization and disinfection and decomposition of toxic and harmful gases. Therefore, in order to improve the reaction effect, the number of such electrode planes is generally increased, as shown in Figure 2 . It is found through research that the more the number is increased, the smaller the effect is improved, and because the high concentration area 101 cannot be changed to be point-shaped, the overall improvement effect is limited.

[0060] The active substances generated by plasma can sterilize, disinfect, and decompose gaseous pollutants. Because high-energy particles and active substances follow a concentration gradient distribution, their concentration is high near the center of the electrode. Although theoretically, these particles and active substances can travel indefinitely, their concentration decreases rapidly further away from the electrode, essentially negating their sterilization, disinfection, and decomposition of toxic and harmful gases. This leads to a rapid decrease in the average concentration of high-energy particles and active substances, affecting the sterilization effect. The efficiency of plasma sterilization and decomposition of gaseous pollutants is closely related to the concentration of high-energy particles and active substances.

[0061] The following is combined Figure 1 , Figure 2 , Figure 13 and Figure 14 This paper introduces the spatial distribution characteristics of high-energy particles and reactive substances in plasma in related technologies:

[0062] like Figure 13 As shown, the concentration of high-energy particles and active substances is high at the center of the plasma wire electrode. As the distance from the wire electrode increases, the concentration of high-energy particles and active substances decreases rapidly. When there is no surrounding boundary, the concentration is distributed and transferred in a high-to-low order. Since high-energy particles and active substances can theoretically be transferred to infinity, the existence of infinite diffusion causes the overall concentration of high-energy particles and active substances to decrease, affecting the sterilization effect.

[0063] Related technologies can increase the average concentration by increasing the number of arrays, such as... Figure 2 , Figure 14 As shown, however, since it is still boundaryless, the average concentration will still decrease, and a large number of electrodes are required, resulting in high volume and energy consumption. In addition, when the gas flow passes vertically through the plasma distribution area, it is actually in contact with the ultra-high concentration high-energy particles and active material point areas. The contact time is short, and since the reaction takes time, it has already passed through the high concentration area 101 before it has fully reacted, resulting in low reaction efficiency.

[0064] The following is combined Figures 3 to 12 The following describes embodiments of the present invention.

[0065] According to an embodiment of the present invention, in one aspect, the present invention provides a plasma discharge device, which includes an electrode structure 10, a current storage shell 20, an air inlet 202, and an air outlet 203.

[0066] Specifically, the electrode structure 10 is used to generate plasma; the flow storage shell 20 is arranged outside the electrode structure 10, and the flow storage shell 20 has a flow storage cavity 201 matched with the shape of the electrode structure 10. The air inlet 202 and the air outlet 203 are arranged at two ends of the flow storage shell 20, the air to be purified enters the flow storage cavity 201 through the air inlet 202, and then flows through the electrode structure 10 along the length direction of the electrode structure 10, and is discharged through the air outlet 203. The cross-sectional area of the air inlet 202 is smaller than the cross-sectional area of the flow storage cavity 201.

[0067] The plasma discharge device provided by the above embodiment can confine high-energy particles, active substances and the like in the plasma in a small space by arranging the flow storage shell 20 outside the electrode structure 10. Due to the arrangement of the closed flow storage cavity 201, the diffusion distance of the high-energy particles and the active substances is limited, and the average concentration of the high-energy particles and the active substances is increased, so that the flow storage cavity 201 with high concentration of high-energy particles and active substances is formed, which is beneficial to improve the reaction efficiency.

[0068] In addition, by changing the airflow from vertically passing through the electrode structure 10 to parallelly passing through the electrode structure 10 along the length direction of the electrode structure 10, specifically, the air inlet 202 and the air outlet 203 are arranged at two ends of the flow storage shell 20, and the airflow direction is consistent with the length direction of the electrode structure 10. Since the vertical distance of each point in the parallel position to the electrode structure 10 is equal, the airflow can always contact the high-energy particles and the active substances in the high-concentration area 101 around the electrode structure 10, and the contact time is longer than that of the vertical passing through the electrode structure 10. Therefore, the pollutants in the air can fully contact and react with the high-energy particles and the active substances with high concentration, so as to improve the reaction efficiency and the purification effect. The problem of low reaction efficiency and poor purification effect caused by the fact that the airflow vertically passes through the electrode structure 10 and the airflow has not fully reacted with the high-energy particles and the active substances before passing through the high-concentration area 101 is effectively solved.

[0069] Further, by controlling the cross-sectional area of the air inlet 202 to be smaller than the cross-sectional area of the flow storage cavity 201, the residence time of the airflow in the flow storage cavity 201 can be controlled, the residence time of the airflow in the flow storage cavity 201 is increased, and the flow storage is further realized. Therefore, under the condition that the air volume is unchanged, the reaction time of the polluted air with the plasma, the high-energy particles and the active substances can be further increased, and the efficiency of the plasma discharge device in sterilization, disinfection and decomposition of gaseous pollutants is improved.

[0070] It should be noted that in the embodiment, the airflow direction is parallel to the length direction of the electrode structure 10, or it can also be said that the airflow direction is parallel to the plane where the electrode structure 10 is located.

[0071] In some embodiments, the flow direction of the air to be purified in the flow cavity 201 is consistent with the length direction of the electrode structure 10, so that the gas pollutants in the airflow can pass through the electrode structure 10 along the longest direction of the electrode structure 10, and the contact time of the pollutants in the airflow with the high-energy particles and active substances in the flow cavity 201 is the longest, which is beneficial to achieving the purpose of achieving the maximum single purification efficiency under the condition of small space.

[0072] Specifically, the air inlet 202 and the air outlet 203 are arranged at two ends of the flow cavity 201 along the length direction of the electrode structure 10, and the purification channel 2010 parallel to the length direction of the electrode structure 10 is formed in the flow cavity 201, so that the airflow can flow through the electrode structure 10 along the direction parallel to the length direction of the electrode structure 10, and the airflow can pass through the longest direction of the high-concentration area 101 and stay for a long time.

[0073] In some embodiments, the ratio of the cross-sectional area of the air inlet 202 to the cross-sectional area of the flow cavity 201 is between 10% and 90%. In this embodiment, by reducing the air inlet 202, the ratio of the cross-sectional area of the air inlet 202 to the cross-sectional area of the flow cavity 201 is limited to between 10% and 90%, so that the size of the air inlet 202 and the volume ratio of the air inlet 202 to the flow cavity 201 are reduced. After the airflow enters the flow cavity 201, the relative residence time of the airflow and the pollutants is longer due to turbulence or airflow dispersion, which can make the pollutants fully react with the high-energy particles and active substances.

[0074] Table 1 - Single reaction rate corresponding to different inlet and outlet cross-sectional areas of a single electrode under the same air volume

[0075]

[0076] As can be seen from Table 1 above, under the condition that the air outlet 203 is constant, the smaller the air inlet 202, the smaller the cross-sectional area of the air inlet 202 to the volume of the flow cavity 201, and the higher the decomposition rate, that is, the higher the reaction efficiency of the pollutants in the air with the high-energy particles and active substances, and the better the purification effect.

[0077] It should be noted that in this embodiment, the air outlet 203 is provided with a fan, and the test is carried out by taking the position of the fan in the air outlet 203 as an example to obtain the above data and conclusions. Of course, under the inspiration of this embodiment, by simple transformation, the fan is arranged at the air inlet 202 to supply air, and the related size data and conclusions of the air outlet 203 can also be obtained, which all belong to the protection scope of the present application.

[0078] The lateral flow storage plasma discharge device can better adapt to the physical characteristics of high-energy particles and active substances of plasma, and the pollutants, bacteria, viruses, toxic and harmful gases in the air can fully contact with the high-energy particles and active substances by adjusting the flow of the air flow organization, and the volume ratio of the air inlet 202 to the flow storage cavity 201 is adjusted by adjusting the cross-sectional area of the air inlet 202, the reaction time of the pollutants and the high-concentration high-energy particles and active substances is controlled, and the reaction efficiency is improved.

[0079] In some embodiments, as shown in Figures 8 to 10 , the flow storage shell 20 includes a shell body 21 and an air inlet portion 22 arranged at one end of the shell body 21. The inner diameter of the air inlet portion 22 is smaller than that of the shell body 21, and the end of the air inlet portion 22 away from the shell body 21 is open to form an air inlet 202. The flow storage cavity 201 is formed in the shell body 21, and the inner cavity of the air inlet portion 22 is communicated with the inner cavity of the shell body 21. By arranging the inner diameter reducing air inlet portion 22, the purified air entering the larger size shell body 21 from the size reducing air inlet portion 22 will diffuse to the entire flow storage cavity 201 under the action of pressure difference, form turbulent flow, and increase the residence time of the gas in the flow storage cavity 201.

[0080] In some embodiments of the above embodiment, as shown in Figure 10 , the air inlet portion 22 can be a hollow columnar structure with a circular or polygonal cross section.

[0081] In other more preferred embodiments, the air inlet portion 22 can also be a variable diameter structure. For example, the shell body 21 is a cuboid, and the air inlet portion 22 is a truncated cone structure with a rectangular cross section.

[0082] Specifically, in the above embodiment, as shown in Figure 8 and Figure 9 , the air inlet portion 22 is a variable diameter structure with both ends open, the air inlet portion 22 has a small diameter end and a large diameter end, wherein the small diameter end forms the air inlet 202, and the large diameter end is connected with the port circumferential edge of the shell body 21. The inner diameter of the air inlet portion 22 gradually increases from the small diameter end to the large diameter end. By using the above design to form the air inlet portion 22, a negative pressure can be formed in the variable diameter region, so that the air gradually diffuses into the flow storage cavity 201, and a turbulent flow is also formed.

[0083] In some embodiments, as shown in Figure 7 and Figure 9As shown, the plasma discharge device further comprises a turbulence structure arranged in the flow storage cavity 201 and adapted to disperse the airflow entering the flow storage cavity 201 and generate turbulence in the flow storage cavity 201. By arranging the turbulence structure, not only can local turbulence be achieved, the gas flow rate can be reduced, and the reaction efficiency can be improved, but also the uniform distribution of the airflow on the entire cross section of the flow storage cavity 201 can be achieved, which is beneficial to prolonging the residence time of the airflow in the flow storage cavity 201.

[0084] In some embodiments, the turbulence structure comprises a mixed turbulence vane 30 fixedly arranged in the flow storage cavity 201 and located close to the air inlet 202, and a plurality of turbulence holes are arranged on the mixed turbulence vane 30. By arranging the mixed turbulence vane 30, the airflow is bent in the local space to generate turbulence, so that the active substances in the space and the pollutants in the airflow can be fully mixed multiple times, and the repeated mixing is beneficial to the chemical reaction, thereby effectively improving the air purification efficiency.

[0085] In the above scheme, the mixed turbulence vane 30 can be a ventilation plate with a porous structure and can be one layer or multiple layers. The mixed turbulence vane 30 can also have a certain thickness and have a spherical or other shape in the middle to generate turbulence in the local space. The mixed turbulence vane 30 can be a common plate, ceramic, zeolite, etc. The material and specific structure of the mixed turbulence vane 30 are not limited in the embodiment, as long as the airflow can be dispersed to generate turbulence and prolong the residence time of the airflow in the flow storage cavity 201.

[0086] It should be noted that the mixed turbulence vane 30 added in the embodiment can further improve the reaction efficiency by local turbulence. The mixed turbulence vane 30 can be one or multiple pieces and can be placed at any position in the flow storage cavity 201, which is not limited in the embodiment.

[0087] By arranging the above turbulence structure, the airflow can fully contact the high-energy particles and active substances, and the action time of the pollutants with the high-energy particles and active substances can be prolonged.

[0088] In some embodiments, as shown in Figure 10 The air inlet 202 and the air outlet 203 are arranged in a staggered manner in the length direction of the electrode structure 10. By arranging the air inlet 202 and the air outlet 203 in a staggered manner, the flow organization, direction, and residence time of the airflow can be controlled, the residence time of the air to be purified in the flow storage cavity 201 can be increased, the polluted gas can fully contact and react with the high-energy particles and active substances, and thus the reaction efficiency of the polluted gas with the high-energy particles and active substances can be further improved, thereby effectively avoiding the problem that in the related art, the air inlet 202 and the air outlet 203 are arranged in a direct opposite manner, the air is directly in and directly out, the residence time of the air to be purified is short, and the reaction is insufficient.

[0089] Further, as shown in Figure 10 the inlet 202 and the outlet 203 are arranged at two ends of the electrode structure 10 along the length direction of the electrode structure 10, and the inlet 202 and the outlet 203 are staggered along the length direction of the electrode structure 10.

[0090] For example, the inlet 202 is arranged at the left side of the bottom wall of the flow storage shell 20, and the outlet 203 is arranged at the right side of the top wall of the flow storage shell 20 or the outlet 203 can also be arranged on the right side wall of the flow storage shell 20.

[0091] In some embodiments, as shown in Figures 6 to 9 the purification channel 2010 is formed in the flow storage cavity 201, and the purification channel 2010 is parallel to the length direction of the electrode structure 10. In this way, when the air flows through the purification channel 2010, the air can flow through the electrode structure 10 in a direction parallel to the electrode structure 10, and the flow direction is parallel to the plane where the electrode structure 10 is located. Since the distance between each point on the parallel position and the electrode structure 10 is the same, the air flow can always be in contact with high-energy particles and active substances of the same concentration, and the contact time is related to the air flow speed and the length of the electrode.

[0092] Further, as shown in Figure 10 the outlet channel is formed in the flow storage cavity 201, and the outlet channel is arranged at a set angle with the purification channel 2010. After the air flows through the electrode structure 10 along the purification channel 2010 in the flow storage cavity 201, the outlet channel is used for turning the air flow, so that the air flow is discharged from the outlet 203 after turning, thereby further locking the concentration of high-energy particles and active substances in the flow storage cavity 201, and avoiding the problem that the high-energy particles and active substances in the flow storage cavity 201 flow out together with the air flow, resulting in a decrease in the concentration of high-energy particles and active substances in the flow storage cavity 201.

[0093] In some embodiments, the inlet direction of the inlet 202 is parallel to the length direction of the electrode structure 10, and the outlet direction of the outlet 203 is at a set angle with the inlet direction of the inlet 202. By using the above design, the air entering from the inlet 202 can directly flow along the length direction of the electrode structure 10, and the inlet does not need to be turned, and the outlet needs to be turned and discharged from the outlet 203, thereby avoiding the problem that the air flow directly enters and directly discharges, and the plasma in the flow storage cavity 201 flows out together with the air flow, resulting in a decrease in the concentration of high-energy particles and active substances in the flow storage cavity 201.

[0094] The embodiment adjusts the position and speed of the airflow flowing through the high-concentration area 101 of the active substance by designing the position of the air inlet 202 and the volume ratio of the air inlet 202 to the flow storage cavity 201, so that the airflow forms a lateral passing mode through the electrode structure 10, and the pollutants in the airflow can fully contact the active substance in the high-concentration area 101.

[0095] In some more preferred embodiments, the air inlet 202 is arranged near the center of the electrode structure 10, that is, the central axis of the air inlet 202 is in the same vertical plane as the center line of the electrode structure 10. This design ensures that the air inlet 202 is in the center of the electrode structure 10, so as to fully contact the high-concentration area 101 on the outer periphery of the electrode structure 10, avoiding the problem that the air inlet 202 is arranged remotely and cannot well contact the high-concentration area 101 on the outer periphery of the electrode.

[0096] The embodiment improves the distribution position of the air inlet 202 and the air outlet 203, the inlet and outlet air directions, and the purification channel 2010, so that the airflow can pass along the longest direction of the high-concentration area 101. The cross-sectional area of the air inlet 202 is smaller than that of the flow storage cavity 201, which can make more airflow mainly pass through the high-concentration area 101 and stay for a long time. The embodiment regulates the airflow running mode by designing the structure of the flow storage cavity 201 itself, which is not only effective, but also can reduce unnecessary control airflow inserts and save costs.

[0097] The embodiment adds a flow storage shell 20 outside the electrode structure 10, which plays a role in guiding and converging flow, so that high-energy particles and active substances converge in the high-concentration area 101 on the outer periphery of the electrode structure 10, and do not diffuse outward, improving the reaction efficiency of high-energy particles and active substances with pollutants in the air. In addition, by reducing the air inlet 202, the air entering the flow storage shell 20 produces local turbulence, so that the airflow fully contacts the high-energy particles and active substances, and the air outlet 203 is further diverted, further prolonging the action time of the pollutants and the high-energy particles and active substances.

[0098] The application can control the airflow to pass through the electrode structure 10 in parallel along the elongated high-concentration area 101 by improving the position, size, air inlet direction of the air inlet 202, and the purification channel 2010, increasing the residence time of the airflow in the high-concentration area 101, and further improving the contact time of the pollutants in the air with the plasma, ensuring that the pollutants fully contact the active particles.

[0099] It should be noted that the contact time between pollutants and high-energy particles and reactive substances is equal to the length of the high-concentration region 101 divided by the airflow velocity. This application increases the contact time between pollutants and high-energy particles and reactive substances by controlling the airflow to flow through the high-concentration region 101 along the longest path and by reducing the airflow velocity through turbulence.

[0100] In some embodiments, the electrode structure 10 includes multiple sets of electrode units arranged side by side, with the arrangement direction of the multiple sets of electrode units perpendicular to the airflow direction. This design allows air to flow through all the electrode units, enhancing the purification effect on pollutants in the air.

[0101] Specifically, the electrode unit can be multiple electrodes arranged in a filament array or sheet array, or it can be a mesh electrode or a grid electrode. This embodiment does not limit this.

[0102] like Figure 6 and Figure 7 As shown, this embodiment uses a wire array as the electrode unit for illustration. The wire array is placed in a sealed storage chamber 201. The chamber has an air inlet 202 and an air outlet 203 at the top and bottom, respectively. The airflow direction is parallel to the electrode plane. Since the vertical distance from each point at the parallel position to the electrode structure 10 is equal, the airflow can always be in contact with high-energy particles and active substances of the same concentration. The contact time is related to the airflow velocity and the electrode length. At the same time, due to the presence of the sealed storage chamber 201, the diffusion distance of high-energy particles and active substances is limited, and the average concentration increases, which is beneficial to improving the reaction efficiency.

[0103] In some preferred embodiments, such as Figures 10 to 12 As shown, the electrode structure 10 divides the storage chamber 201 into two interconnected regions; one region is the reaction zone 2011 connected to the air inlet 202, and the other region is the compensation zone 2012 connected to the air outlet 203; after plasma is generated, the high-energy particles and active substances in the plasma diffuse throughout the storage chamber 201. When the high-energy particles and active substances in the reaction zone 2011 are consumed by the reaction with pollutants in the air, the high-energy particles and active substances in the compensation zone 2012 can automatically enter the reaction zone 2011 under the action of the concentration difference to compensate for the plasma consumed in the reaction zone 2011.

[0104] In the above embodiment, with the electrode structure 10 as the center, the storage chamber 201 is divided into two parts. One part is the reaction zone 2011, which is provided with an air inlet 202. The cross-section of the air inlet 202 is small enough to ensure that the airflow stays in the reaction zone 2011 for a sufficient period of time. The other part is the compensation zone 2012, which is provided with an air outlet 203. By setting the air inlet 202 and air outlet 203 in the two areas in a staggered manner, almost no airflow enters the compensation zone 2012, while high-energy particles and active substances are still generated. Therefore, a large number of high-energy particles and active substances are stored in the compensation zone 2012. When the high-energy particles and active substances in the reaction zone 2011 are lost due to the reaction, since no loss occurs in the compensation zone 2012, a high-concentration zone and a relatively low-concentration zone are formed in the entire storage chamber 201. At this time, the high-energy particles and active substances will diffuse into the reaction zone 2011 through the concentration gradient to compensate for the high-energy particles and active substances lost in the reaction zone 2011, so that the reaction zone 2011 is always in a high-concentration state, thereby improving the reaction efficiency of the high-energy particles and active substances in the reaction zone 2011 with air pollutants.

[0105] It should be noted that in this embodiment, the reaction zone 2011 and the compensation zone 2012 have roughly the same volume, each being approximately half the total volume of the storage chamber 201. The air inlet 202 is less than 50% of the cross-sectional area of ​​the storage chamber 201. Preferably, the ratio of the cross-sectional area of ​​the air inlet 202 to the cross-sectional area of ​​the storage chamber 201 is between 10% and 50%.

[0106] This embodiment also explains why there is almost no airflow through the compensation zone 2012. Through airflow organization analysis, it was found that since the top air outlet 203 is a negative pressure zone, the airflow mainly passes through the area between the air inlet 202 and the air outlet 203, that is, the purification channel 2010 parallel to the electrode structure 10. For example, in a closed room with a door and a window on the opposite side, the airflow mainly passes through the door and the window. Since there are other spaces in the room, the fresh air can diffuse relatively far inside. However, on the walls away from the door and window, there is basically no relative airflow. Therefore, there is almost no airflow through the compensation zone 2012, while high-energy particles and active substances can penetrate the electrode structure 10 and enter the reaction zone 2011 under the action of the concentration difference.

[0107] In some embodiments, see Figure 10 As shown, the electrode structure 10 is a sheet electrode, and the reaction region 2011 and the compensation region 2012 are distributed on the left and right sides of the electrode structure 10.

[0108] The embodiment improves the structure of the flow storage shell 20, the air inlet 202 and the air outlet 203 to regulate the air flow organization, forms the compensation area 2012 storing high-density high-energy particles and active substances, and the high-energy particles and active substances in the area can continuously diffuse to the reaction area 2011 through the concentration gradient to compensate for the loss of high-energy particles and active substance concentration, thereby benefiting the maximum single purification efficiency under small space conditions.

[0109] In some specific embodiments, the air inlet 202 is opened on the bottom wall 213 of the flow storage shell 20 of the reaction area 2011, and the air outlet 203 is opened on the top of the side wall of the flow storage shell 20 of the compensation area 2012. Through air flow organization analysis, after the air inlet 202 and the air outlet 203 are arranged as described above, the compensation area 2012 has almost no air flow passing through, and high-energy particles and active substances are still generated. Therefore, when the high-energy particles and active substances in the reaction area 2011 are consumed by reaction, the concentration of high-energy particles and active substances in the compensation area 2012 will be higher than that in the reaction area 2011, and the high-energy particles and active substances in the compensation area 2012 will automatically compensate to the reaction area 2011, so that the average concentration of high-energy particles and active substances in the reaction area 2011 is higher. In addition, through the diversion arrangement of the air outlet 203, the concentration of high-energy particles and active substances can be further locked.

[0110] It should be noted that in the embodiment, the air inlet 202 is not limited to being opened on the bottom wall 213 of the flow storage shell 20, but can also be opened on the bottom of the side wall of the flow storage shell 20 of the reaction area 2011, and the air outlet 203 is not limited to being opened on the side wall of the flow storage shell 20, but can also be opened on the top wall 214 of the flow storage shell 20 of the compensation area 2012.

[0111] Further, in the embodiment, as shown in Figures 10 to 12 The flow storage shell 20 includes a bottom wall 213, a top wall 214, and oppositely arranged reaction area side walls 211 and compensation area side walls 212, and two end walls connected to both ends of the reaction area side walls 211 and the compensation area side walls 212. The reaction area side walls 211 and the compensation area side walls 212 are parallel to the length direction of the electrode structure 10, the electrode structure 10 is arranged at the middle position of the flow storage shell 20, the space between one side of the electrode structure 10 and the reaction area side wall 211 constitutes the reaction area 2011, and the space between the other side of the electrode structure 10 and the compensation area side wall 212 constitutes the compensation area 2012. The air outlet 203 is opened at the top position of the compensation area side wall 212.

[0112] In the design of the flow storage shell 20, the size of the compensation area 2012 can be designed according to the concentration of the active substance to be reserved. The smaller the space of the compensation area 2012, the higher the concentration, but the total amount is small; the larger the space, although the total amount of the stored active substance is large, the concentration of the active substance is low, the concentration gradient diffusion ability is poor, and the transmission is less. Therefore, in general, the volume of the compensation area 2012 is designed to be equivalent to the volume of the reaction area 2011.

[0113] In some embodiments, as shown in Figs. 1 and 2, the electrode structure 10 includes a ring-shaped electrode body 11, and the reaction area 2011 is distributed on the outer side of the ring-shaped electrode body 11, and the compensation area 2012 is distributed on the inner side of the ring-shaped electrode body 11. Figure 11 Figure 12 In some embodiments, as shown in Figs. 1 and 2, the electrode structure 10 includes a ring-shaped electrode body 11, and the reaction area 2011 is distributed on the outer side of the ring-shaped electrode body 11, and the compensation area 2012 is distributed on the inner side of the ring-shaped electrode body 11.

[0114] In the above scheme, the electrode structure 10 is arranged in a ring shape, and the flow storage shell 20 is also correspondingly arranged in a ring shape, so that the entire plasma discharge device can adapt to the general square purifier overall structure, improving the adaptability and practicality of the plasma discharge device.

[0115] It should be noted that the electrode body 11 is in a cylindrical shape, which can be formed by arranging multiple electrode rings in a ring shape or by arranging multiple electrode sheets in a ring shape, or can be formed by a mesh electrode or a grid electrode, and the present embodiment does not limit this.

[0116] In some specific embodiments of the above embodiments, the reaction area 2011 and the compensation area 2012 are both ring-shaped cavity structures.

[0117] In the above embodiments, by designing the reaction area 2011 and the compensation area 2012 to be ring-shaped, the volume of the reaction area 2011 can be maximized by adjusting the diameter of the reaction area side wall 211 and the compensation area side wall 212. The active substance in the reaction area 2011 is consumed, and the gas flow passing through the reaction area 2011 also sweeps the active substance in the reaction area 2011 to a certain extent. The compensation area 2012 can improve the concentration of the active substance in the reaction area 2011 without increasing the structural complexity, and ensure that the bacteria odor and other pollutants can be completely decomposed.

[0118] In some embodiments, the flow storage shell 20 has a ring-shaped shell body 21 matching the shape of the electrode body 11, the air inlet 202 is arranged on the bottom wall 213 or the inner circumferential side of the bottom of the shell body 21, and the air outlet 203 is arranged on the inner circumferential side of the top of the shell body 21. By such design, after the gas flow passes through the reaction area 2011, it needs to be turned and discharged through the air outlet 203, further locking the concentration of the high-energy particles and the active substance in the storage area.

[0119] ​In the above embodiments, the air inlet 202 is an annular opening, which can be formed on the bottom wall 213 of the shell body 21. Alternatively, in other alternative embodiments, in order to facilitate the connection of the air inlet 202 with other components, the air inlet 202 can also be arranged on the inner circumferential side of the bottom of the shell body 21.

[0120] The present embodiment takes the air inlet 202 arranged on the inner circumferential side of the bottom of the shell body 21 as an example for detailed description.

[0121] In the present embodiment, the electrode structure 10 further comprises a blocking plate 12, the electrode body 11 is fixed on the blocking plate 12, and the outer diameter of the blocking plate 12 is greater than the inner diameter of the annular bottom wall 213 of the shell body 21 and is less than the outer diameter of the annular bottom wall 213. Preferably, the blocking plate 12 is a circular plate structure. The bottom surface of the blocking plate 12 and the bottom wall 213 of the flow storage shell 20 have a set gap therebetween, which forms the air inlet 202. After the air flows into the reaction zone 2011 from the gap, the air is diverted under the action of the reaction zone side wall 211 and flows out of the reaction zone 2011 in a direction parallel to the electrode body 11. Such design causes the air flow to be diverted at the air inlet 202 to generate turbulence, thereby increasing the residence time of the air flow in the reaction zone 2011, so as to enable the pollutants to be more fully contacted and reacted with the high-energy particles and active substances. In addition, the air inlet 202 is designed in the above manner, which facilitates the assembly and connection of the plasma discharge device with the outlet of the filter of the air purification equipment.

[0122] Further, in some embodiments, the blocking plate 12 can be supported and fixed between the bottom wall 213 of the flow storage shell 20 by a support column. Alternatively, the upper end of the electrode body 11 can also be directly connected and fixed on the top wall 214 of the flow storage shell 20.

[0123] Further, the flow storage shell 20 further comprises a compensation zone side wall 212 arranged in a cylindrical manner in the electrode body 11, the outer diameter of the compensation zone side wall 212 is less than the inner diameter of the electrode body 11, the compensation zone side wall 212 is fixed on the blocking plate 12, and the compensation zone side wall 212 and the top wall 214 of the flow storage shell 20 have a set gap therebetween, which forms an annular air outlet 203. The air outlet 203 formed by the reserved gap does not need to be additionally opened on the compensation zone side wall 212, thereby simplifying the process.

[0124] In addition, the air outlet 203 is formed on the inner circumferential side of the top of the flow storage shell 20, and the air flow needs to be diverted when being discharged through the air outlet 203, which can further lock the concentration of high-energy particles and active substances.

[0125] Further, the compensation zone side wall 212 can be a hollow cylindrical structure or also a solid columnar structure, and preferably, in order to reduce the weight, the compensation zone side wall 212 adopts a hollow cylindrical structure.

[0126] The air storage shell 20 of the embodiment can make the air pollutants fully combine with the high-energy particles and form a concentration difference by the arrangement of the reaction area 2011 and the compensation area 2012 and the special size and position design of the air inlet 202 and the air outlet 203, so as to ensure that the air in the reaction area 2011 fully contacts with the high-energy particles and the active substances.

[0127] In some alternative embodiments, the wire array electrode used in the electrode structure 10 of the embodiment can be replaced by a sheet array electrode, a mesh electrode, a grid electrode, or a needle array electrode, a thorn array electrode, etc.

[0128] In some alternative embodiments, the length, spacing and number of the wires, strips, meshes and grids are designed to control the distribution and concentration of the high-energy particles and the active substances in space. The concentration distribution of the active substances is in an exponential distribution, and the distribution map after arraying and superimposing can be calculated. According to the distribution map, the flow guide and concentration diffusion limiting points can be set, so that the concentration of the active substances can be enhanced, and the air flow can pass through the high-concentration area, thereby solving the problems of low reaction efficiency caused by uneven distribution of the active substances and high loss caused by spatial diffusion of the active substances.

[0129] According to an embodiment of the application, in another aspect, there is provided an air purification device comprising the plasma discharge device of any of the above embodiments.

[0130] Optionally, the air purification device comprises a fan arranged at the air outlet 203 of the air storage shell 20, which is adapted to suck air so that the air flows into the air storage shell 20 from the air inlet 202 and is discharged from the air outlet 203 after being purified.

[0131] The embodiment provides a lateral air storage air purification device, and the plasma discharge device used in the embodiment changes the vertical flow through the electrode plane to parallel flow through the electrode plane, and controls the wall structure of the air storage shell 20 on both sides of the electrode plane to confine the plasma and the high-energy particles and the active substances in a small space, so as to form a high-concentration high-energy particle and active substance area. Therefore, under the condition that the air volume is unchanged, the action time of the polluted air with the plasma and the high-energy particles and the active substances is increased, and under the condition that the discharge parameters are not changed, the concentration of the high-energy particles and the active substances is significantly improved, the efficiency of sterilization and disinfection and decomposition of gaseous pollutants is improved, and space can be saved.

[0132] Note that in the present application, the plasma generated by the electrode structure 10, and the high-energy particles and active substances exist in the plasma for a long time, and thus can diffuse into the internal space of the current storage case 20, and most of the high-energy particles and active substances that play a role in sterilizing and decomposing gaseous pollutants in the space exist for a long time and are uniformly concentrated. The present application is to increase the concentration of high-energy particles and active substances without changing the plasma density (discharge state) almost at all.

[0133] Although the embodiments of the present application have been described with reference to the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the present application defined by the appended claims.

Claims

1. A plasma discharge device, characterized by, The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device.

2. The plasma discharge device of claim 1, wherein The application relates to a plasma discharge device. The application relates to a plasma discharge device.

3. The plasma discharge device of claim 1, wherein The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. The application relates to a plasma discharge device. 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The application relates to a 4. The plasma discharge device of claim 3, wherein The turbulence structure comprises: A mixing turbulence sheet (30) is fixedly arranged in the flow storage cavity (201) and located close to the air inlet (202), and a plurality of turbulence holes are arranged on the mixing turbulence sheet (30) in intervals.

5. The plasma discharge device according to any one of claims 1 to 4, characterized in that The air inlet (202) and the air outlet (203) are arranged in a staggered manner in the length direction of the electrode structure (10).

6. The plasma discharge device according to any one of claims 1 to 4, characterized in that A purification channel (2010) for parallel flow of the gas through the electrode structure (10) is formed in the flow storage cavity (201), and the purification channel (2010) is located on the outer circumferential side of the electrode structure (10) and parallel to the length direction of the electrode structure (10).

7. The plasma discharge device according to any one of claims 1 to 4, characterized in that The air inlet direction of the air inlet (202) is parallel to the length direction of the electrode structure (10), and the air outlet direction of the air outlet (203) forms a set angle with the air inlet direction of the air inlet (202).

8. The plasma discharge device according to any one of claims 1 to 4, characterized in that The electrode structure (10) comprises a plurality of groups of electrode units arranged side by side, and the arrangement direction of the plurality of groups of electrode units is perpendicular to the direction of the gas flow.

9. The plasma discharge device of claim 1, wherein, The electrode structure (10) is a sheet electrode, and the reaction zone (2011) and the compensation zone (2012) are distributed on the left and right sides of the electrode structure (10).

10. The plasma discharge device of claim 1, wherein, The reaction zone (2011) and the compensation zone (2012) are both annular cavity structures.

11. The plasma discharge device of claim 10, wherein, The flow storage shell (20) has an annular shell body (21) matched with the shape of the electrode body (11), the air inlet (202) is arranged on the bottom wall (213) of the shell body (21), and the air outlet (203) is arranged on the inner circumferential side of the top of the shell body (21).

12. An air purification apparatus characterized by comprising: The plasma discharge device comprises the electrode structure according to any one of claims 1 to 11. The plasma discharge device comprises the electrode structure according to any one of claims 1 to 11.

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