A filtering component and an air purification device

Abstract

The present invention relates to a filtering component and an air purification device. The filtering component includes a discharge electrode and a ground electrode; a filter screen, the manufacturing material of which includes a dielectric material, is located between the discharge electrode and the ground electrode and is disposed opposite to the ground electrode. The distance between the discharge electrode and the filter screen is d1, where 0 ≤ d1 ≤ 20 mm. The filtering component of the present invention can achieve polarization charging of the filter screen by means of the electric field between the discharge electrode and the ground electrode. The intermittent charging of the filter screen ensures the constant purification effect of the electrostatic adsorption effect on ultra-fine particles, and avoids the problem of weakened purification efficiency caused by the electrostatic attenuation during the long-term use of the filter screen. At the same time, in the filtering component model, that is, the filter screen is between the discharge electrode and the ground electrode, the dust attached to the filter screen can grow in a dendritic shape, and the dust with this morphological growth is not easy to block the mesh holes of the filter screen, significantly improving the purification efficiency under the same dust capacity condition.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification equipment, and particularly relates to a filter component and an air purification device. Background Art

[0002] Electret air purification devices generally utilize the electrostatic electret effect to make a filter screen made of a dielectric material charged. It can change the trajectories of dust and other particulate matters under the action of electrostatic force, thereby adsorbing dust and other particulate matters, and has a relatively high filtration efficiency. However, during the R & D process, the applicant found that the electret in the existing electret air purification device has a problem of charge decay during use, and its adsorption effect on dust will be greatly reduced within a few months, thereby reducing the air purification efficiency of the air purification device. In addition, with the increase of the use time, the dust attached to the filter screen will gradually block the mesh holes of the filter screen, making it difficult for the air flow to quickly pass through the mesh holes, further reducing the air purification efficiency. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the charge carried by the air purification device in the prior art gradually decays during use and the adsorbed dust easily blocks the mesh holes, so as to provide a filter component and an air purification device.

[0004] To solve the above problems, a first aspect of the present invention provides a filter component, including: a discharge electrode and a ground electrode; a filter screen, the manufacturing material of which includes a dielectric material, is located between the discharge electrode and the ground electrode and is disposed opposite to the ground electrode, and the distance between the discharge electrode and the filter screen is d1, 0 ≤ d1 ≤ 20 mm.

[0005] Further, the distance between the ground electrode and the filter screen is d2, 0 ≤ d2 ≤ 5 mm.

[0006] Further, the filter screen is wavy.

[0007] Further, a plurality of first grooves facing the discharge electrode and second grooves facing the ground electrode are bent on the filter screen, and the discharge electrode includes a first insertion portion inserted into the first grooves;

[0008] and / or, the ground electrode includes a second insertion portion inserted into the second grooves.

[0009] Further, the bottom of the first groove and the bottom of the second groove are pointed.

[0010] Further, the first insertion portion and the second insertion portion are parallel to each other, and the space between the first insertion portion and the second insertion portion is suitable for air to pass through.

[0011] Further, the discharge electrode further includes a first frame, and the first insertion portion is arranged on the first frame;

[0012] The ground electrode further includes a second frame, and the second insertion part is arranged on the second frame. A channel suitable for air to pass through is formed between the first frame and the second frame.

[0013] Furthermore, the ground electrode is arranged in parallel with the filter screen.

[0014] Furthermore, the thickness of the filter screen is any value in the range of 55 - 60 mm, and the discharge voltage of the discharge electrode is any value in the range of 14 - 16 KV.

[0015] In a second aspect of the present invention, there is provided an air purification device, including: a housing having an air inlet and an air outlet; and a filter assembly according to the first aspect of the present invention.

[0016] The present invention has the following advantages:

[0017] 1. As can be seen from the above technical solution, in the filter assembly of the first aspect of the present invention, the filter screen is arranged in the electric field formed by the discharge electrode and the ground electrode, and the distance d1 between the discharge electrode and the filter screen is set to be greater than or equal to 0 and less than or equal to 20 mm. Through repeated experiments and verifications by the applicant, the filter assembly of the present invention can polarize and charge the filter screen by means of the electric field between the discharge electrode and the ground electrode, so that polarization charges are generated in the filter screen, and the filter screen can be charged regularly or in real time, realizing the constant effect of the electrostatic mechanism of the filter screen and avoiding the loss of the dust adsorption effect of the filter screen due to charge decay. In addition, when the filter screen is in the electric field between the discharge electrode and the ground electrode, the dust attached to the filter screen will grow in a dendritic shape, and the dust with this morphological growth is not easy to block the mesh holes of the filter screen. Under the condition of the same dust holding capacity, the purification efficiency is significantly improved.

[0018] 2. The distance between the ground electrode and the filter screen is preferably d2, where 0 ≤ d2 ≤ 5 mm. After multiple experiments by the applicant, it is confirmed that the filter screen will release charges towards the ground electrode during use and form an electric field between the filter screen and the ground electrode. When d2 is selected within the above range, the filter screen polarized by the electric field has a micro-discharge effect on the ground electrode. The electron energy is in the order of several ev, and highly oxidative active groups such as hydroxyl groups generated by electrons hitting the air oxidize microorganisms such as bacteria; electrons can also directly collide with the outer tissue cell wall of bacteria. Multiple effects inactivate virus microorganisms such as bacteria, achieving a good sterilization effect. It avoids the generation of peculiar smell after long-term use of the filter screen, and overcomes the defect that the filter assembly in the prior art can only filter dust in the air and cannot disinfect and sterilize.

[0019] 3. Multiple first grooves facing the discharge electrode and second grooves facing the ground electrode are formed by bending on the filter mesh. The discharge electrode includes a first insertion part inserted into the first groove, and the ground electrode includes a second insertion part inserted into the second groove. At this time, a uniform electric field can be formed between the first insertion part and the second insertion part. This enables the electric field between each adjacent first insertion part and second insertion part to polarize the part of the filter mesh located therebetween, so that each section of the wavy filter mesh can adsorb and disinfect dust in the air. The air passing through the filter assembly in a direction perpendicular to the first insertion part and the second insertion part can be filtered multiple times by the filter mesh, greatly improving the filtering effect of the filter assembly.

[0020] 4. The air purification device provided in the second aspect of the present invention has its effects because it includes or uses the filter assembly provided in the first aspect of the present invention, that is, it can polarize the filter mesh by means of the electric field between the discharge electrode and the ground electrode, so as to generate polarized charges in the filter mesh and avoid the loss of the dust adsorption effect of the filter mesh due to charge decay. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Schematically shows the filter assembly of Embodiment 1 of the present invention;

[0023] Figure 2 Is a top view of the filter assembly of Embodiment 1 of the present invention;

[0024] Figure 3 Is the discharge electrode of the filter assembly of Embodiment 2 of the present invention;

[0025] Figure 4 Is a top view of the filter assembly of Embodiment 4 of the present invention.

[0026] Description of the Reference Numerals:

[0027] 100, filter assembly; 1, discharge electrode; 11, first insertion part; 12, first frame; 2, ground electrode; 21, second insertion part; 22, second frame; 3, filter mesh; 31, first groove; 32, second groove. Detailed Embodiments

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Embodiment 1

[0033] Figure 1 Schematically shows the filtering component of Embodiment 1 of the present invention. Figure 2 Is a top view of the filtering component of Embodiment 1 of the present invention; as Figure 1 and Figure 2As shown, the filtration component 100 of Embodiment 1 includes a discharge electrode 1, a ground electrode 2, and a filter screen 3. Among them, the manufacturing material of the filter screen 3 includes a dielectric material. The filter screen 3 is located between the discharge electrode 1 and the ground electrode 2 and is disposed opposite to the ground electrode 2. The distance between the discharge electrode 1 and the filter screen 3 is d1, where 0 ≤ d1 ≤ 20 mm. The discharge electrode 1 can be connected to a power source and an electric field is formed between the discharge electrode 1 and the ground electrode 2. The power source is preferably but not limited to a high-voltage DC power source. The user can choose to continuously connect the discharge electrode 1 to the high-voltage DC power source, so as to jointly purify the air by using the electric field between the discharge electrode 1 and the ground electrode 2 and the polarized filter screen 3; or the user can choose to periodically connect the discharge electrode 1 to the high-voltage DC power source and polarize the filter screen 3 by using the electric field between the discharge electrode 1 and the ground electrode 2, and the filter screen 3 can be charged periodically or in real time to achieve the constant effect of the electrostatic mechanism of the filter screen 3, thereby avoiding the loss of the dust adsorption effect of the filter screen 3 due to the electrostatic attenuation phenomenon. The thicker the filter screen 3 is, the higher the voltage of the high-voltage DC power source is required to polarize the filter screen 3. For example, in this embodiment, the thickness of the filter screen 3 is 50 - 60 mm, and the discharge voltage of the discharge electrode 11 is 14 - 16 KV. In a preferred embodiment, the thickness of the filter screen 3 is 59 mm, and the discharge voltage of the discharge electrode 1 is 15 KV.

[0034] The material of the filter screen 3 is a dielectric material, which can be either a dielectric material of a polymer electret or a non-electret dielectric material. The difference is that when the material of the filter screen 3 is selected as a non-electret dielectric material, the electrostatic decay in the filter screen 3 is relatively fast, and the user needs to polarize the filter screen 3 by connecting the discharge electrode 1 to the high-voltage DC power source every day. When the material of the filter screen 3 is selected as an electret material, the electrostatic decay of the filter screen 3 is slower. The period of polarizing the filter screen 3 by using an electric field can be extended to about 3 to 6 months, which can not only save energy but also help improve the user experience. The electret material can be a non-polar material, such as polypropylene, polytetrafluoroethylene, hexafluoroethylene / polytetrafluoroethylene copolymer, etc.; it can also be a polar material or a weakly polar material, such as polytrifluoroethylene, polypropylene blend, and polyester, etc. However, preferably, in this embodiment, the filter screen 3 is a HEPA high-efficiency particulate filter screen 3, which can filter the air more thoroughly. The materials of the discharge electrode 1 and the ground electrode 2 are preferably but not limited to carbon fiber or conductive metal, etc.

[0035] As can be seen from the above technical solution, in the filtering component 100 of the embodiment, the filter screen 3 is arranged in the electric field formed by the discharge electrode 1 and the ground electrode 2, and the distance d1 between the discharge electrode 1 and the filter screen 3 is set to be greater than or equal to 0 and less than or equal to 20 mm. After repeated experiments and verification by the applicant, the filtering component 100 of this embodiment can polarize and charge the filter screen 3 by means of the electric field between the discharge electrode 1 and the ground electrode 2. The intermittent charging of the filter screen 3 ensures the constant purification effect of the electrostatic adsorption effect on ultra-fine particles. In addition, when the filter screen 3 is in the electric field between the discharge electrode 1 and the ground electrode 2, the dust attached to the filter screen 3 can grow in a dendritic shape. The dust with this morphological growth is not easy to block the mesh holes of the filter screen 3, and the air permeation speed of the filter screen 3 is not easy to gradually decrease with the increase of the use time, and the filtering efficiency of the filtering component 100 is significantly improved under the condition of the same dust holding capacity.

[0036] In this embodiment, the distance between the ground electrode 2 and the filter screen 3 is preferably d2, 0≤d2≤5 mm. After multiple experiments, the applicant confirmed that the filter screen 3 will release charges in the direction towards the ground electrode 2 during use and form an electric field between the filter screen 3 and the ground electrode 2. When d2 is selected within the above range, the filter screen 3 polarized by the electric field has a micro-discharge effect on the ground electrode 2. The electron energy is in the order of several ev, and highly oxidative active groups such as hydroxyl groups generated by the electrons hitting the air oxidize microorganisms such as bacteria; the electrons can also directly collide with the outer tissue cell wall of the bacteria. Multiple effects inactivate virus microorganisms such as bacteria, achieving a good sterilization effect. It avoids the generation of peculiar smell after the long-term use of the filter screen 3 and overcomes the defect that the filtering component 100 in the prior art can only filter the dust in the air and cannot disinfect and sterilize.

[0037] In this embodiment, the filter screen 3 can be optionally planar, but is preferably wavy. The wavy filter screen 3 can generate more polarized charges in the electric field under the same occupied space, thereby enhancing the electric field strength between it and the ground electrode 2, and further strengthening the disinfection and sterilization effect of the filter assembly 100. The discharge electrode 1 and the ground electrode 2 are respectively planar, and are preferably arranged in a direction parallel to the filter screen 3. In this embodiment, the discharge electrode 1 can be optionally formed by winding metal wires or carbon fiber bundles. To improve the mechanical strength of the discharge electrode 1, the discharge electrode 1 preferably further includes a first frame 12. The metal wires or carbon fiber bundles are wound around the first frame 12. The ground electrode 2 can be optionally a metal mesh or a perforated metal plate. The discharge electrode 1 and the ground electrode 2 can allow air to pass through the filter assembly 100 in a direction perpendicular to the discharge electrode 1 and the ground electrode 2 and be filtered and disinfected. When the discharge electrode 1 is arranged in a direction parallel to the filter screen 3, it can uniformly polarize the filter screen 3. The ground electrode 2 and the filter screen 3 are preferably arranged in parallel. This enables the filter screen 3 to discharge uniformly in a direction approaching the ground electrode 2, thereby helping the filter screen 3 to fully sterilize the air and avoiding uncontrollable sterilization effects caused by uneven electric fields between the filter screen 3 and the ground electrode 2.

[0038] Embodiment 2

[0039] Embodiment 2 relates to a filter assembly 100, which is different from the filter assembly 100 in Embodiment 1 in that a plurality of first grooves 31 facing the discharge electrode 1 and second grooves 32 facing the ground electrode 2 are bent on the filter screen 3. The discharge electrode 1 includes a first insertion portion 11 inserted into the first groove 31 (see Figure 3 ). The ground electrode 2 is a planar metal mesh or a perforated metal plate. At this time, since the first insertion portion 11 of the discharge electrode 1 has a small radius of curvature, the electric field strength formed at the end of the first insertion portion 11 is extremely strong, which can break down the air near the first insertion portion 11 to generate a plasma containing various charged ions. The electrons generated in this process can directly charge dust and other particulate matters in the flowing air. Also, since an electric field is formed between the discharge electrode 1 and the ground electrode 2, the charged particulate matters move in the direction of the ground electrode 2 in the electric field and are captured under the adsorption action of the filter screen 3. Therefore, the filter assembly 100 in Embodiment 2 can also charge dust and other particulate matters in the flowing air by means of the discharge electrode 1, and thus drive the charged dust towards the filter screen 3 by means of the electric field force, and it has a higher filtration efficiency.

[0040] Among them, the first insertion part 11 can be selected as a metal sheet, a needle electrode, a carbon fiber bundle, etc. Preferably, it is a needle electrode and a wire with a smaller radius of curvature. Preferably, the discharge electrode 1 preferably further includes a first frame 12, and the first insertion part 11 is arranged on the first frame 12. In order to polarize the filter screen 3 as evenly as possible, the first insertion part 11 is preferably arranged to be evenly distributed on the first frame 12. The ground electrode 2 and the filter screen 3 are preferably arranged in parallel. This enables the filter screen 3 to discharge evenly in the direction approaching the ground electrode 2, thereby helping the filter screen 3 to fully sterilize the air and avoiding the uncontrollability of the sterilization effect due to the uneven electric field between the filter screen 3 and the ground electrode 2. The discharge electrode 1 and the ground electrode 2 allow air to pass through the filter assembly 100 in a direction perpendicular to the discharge electrode 1 and the ground electrode 2 and be filtered and disinfected.

[0041] Example 3

[0042] Example 3 relates to a filter assembly 100, which is different from the filter assembly 100 in Example 1 in that the filter assembly 100 is arranged such that a plurality of first grooves 31 facing the discharge electrode 1 and second grooves 32 facing the ground electrode 2 are formed by bending on the filter screen 3. The discharge electrode 1 is planar. The ground electrode 2 includes a second insertion part 21 inserted into the second groove 32. At this time, the distance between the ground electrode 2 and the filter screen 3 is significantly reduced, which helps to enhance the electric field strength between the filter screen 3 and the ground electrode 2, thereby enhancing the killing effect of the filter assembly 100 on harmful organisms such as molds and virus microorganisms. In this embodiment, the discharge electrode 1 can be selected as being wound by a wire or a carbon fiber bundle. In order to improve the mechanical strength of the discharge electrode 1, the discharge electrode 1 preferably further includes a first frame 12, and the wire or carbon fiber bundle is wound on the first frame 12.

[0043] Among them, the bottom of the first groove 31 and the bottom of the second groove 32 are in a sharp angle shape, which helps to supplement the charge of the filter screen 3 and enhance the electric field strength between the filter screen 3 and the ground electrode 2.

[0044] The ground electrode 2 can be selected as a metal mesh or a perforated metal plate. The second insertion part 21 is preferably a metal sheet or is made by bending a conductive mesh such as metal or carbon fiber. When the ground electrode 2 is selected as a mesh made of a wire or a carbon fiber bundle, the ground electrode 2 preferably further includes a second frame 22. The wire or carbon fiber bundle is wound on the second frame 22. In order to avoid the uncontrollability of the sterilization effect due to the uneven electric field between the filter screen 3 and the ground electrode 2. The second insertion part 21 is preferably evenly distributed on the second frame 22. The discharge electrode 1 and the ground electrode 2 allow air to pass through the filter assembly 100 in a direction perpendicular to the discharge electrode 1 and the ground electrode 2 and be filtered and disinfected. When the discharge electrode 1 is preferably arranged in a direction parallel to the filter screen 3, the filter screen 3 can be evenly polarized.

[0045] Example 4

[0046] Example 4 relates to a filtering component 100, which is different from the filtering component 100 in Example 1 in that a plurality of first grooves 31 facing the discharge electrode 1 and second grooves 32 facing the ground electrode 2 are formed by bending on the filter screen 3. The discharge electrode 11 includes a first insertion portion 11 inserted into the first groove 31, and the ground electrode 2 includes a second insertion portion 21 inserted into the second groove 32. As Figure 4 shown, at this time, a uniform electric field can be formed between the first insertion portion 11 and the second insertion portion 21. This enables the electric field between each group of adjacent first insertion portions 11 and second insertion portions 21 to polarize the part of the filter screen 3 located therebetween, so that each section of the wavy filter screen 3 can adsorb and disinfect dust in the air. The air passing through the filtering component 100 in a direction perpendicular to the first insertion portion 11 and the second insertion portion 21 can be filtered multiple times by the filter screen 3, greatly improving the filtering effect of the filtering component 100. In this embodiment, both the discharge electrode 1 and the ground electrode 2 are preferably made of metal sheets, metal meshes, carbon fiber meshes or insulating materials coated with conductive coatings.

[0047] Among them, the bottom of the first groove 31 and the bottom of the second groove 32 are sharp-angled, which helps to supplement charge to the filter screen 3 and enhance the electric field strength between the filter screen 3 and the ground electrode 2.

[0048] Since the first insertion portion 11 of the discharge electrode 1 has a small radius of curvature, the electric field strength formed at the end of the first insertion portion 11 is extremely strong, which can break down the air near the first insertion portion 11 to generate a plasma containing a variety of charged ions. The electrons generated in this process can directly charge particulate matters such as dust in the flowing air. Also, since an electric field is formed between the discharge electrode 1 and the ground electrode 2, the charged particulate matters move towards the ground electrode 2 in the electric field and are captured under the adsorption action of the filter screen 3.

[0049] In this embodiment, the first insertion portion 11 and the second insertion portion 21 are preferably arranged to be parallel to each other, which can form a uniform electric field between the first insertion portion 11 and the second insertion portion 21, so as to uniformly polarize the filter screen 3. The space between the first insertion portion 11 and the second insertion portion 21 is suitable for air to pass through. Thus, the wavy filter screen 3 is allowed to filter the air multiple times.

[0050] Example 5

[0051] Example 5 relates to an air purification device, including a housing and a filtering component 100. Among them, the housing has an air inlet and an air outlet.

[0052] When the filtering component 100 is selected as the filtering component 100 involved in Embodiment 1, 2 or 3, the discharge electrode 1 of the filtering component 100 is located on the windward side and is upstream of the air duct; the ground electrode 2 of the filtering component 100 is located downstream of the air duct, and the air inlet and the air outlet are preferably arranged such that air can pass through the filtering component 100 in a direction perpendicular to the discharge electrode 1 and the ground electrode 2.

[0053] When the filtering component 100 is selected as the filtering component 100 involved in Embodiment 4 of the present application, the air inlet and the air outlet are preferably arranged such that air can pass through the filtering component 100 in a direction perpendicular to the first insertion portion 11 and the second insertion portion 21, and the filter screen 3 is allowed to filter and disinfect the air multiple times.

[0054] Since the air purification device of Embodiment 5 includes or uses the filtering component 100 involved in Embodiment 1, 2, 3 or 4, it also has its effects, that is, it can overcome the defects that the charge carried by the air purification device in the prior art gradually decays during use and the adsorbed dust easily clogs the mesh holes.

[0055] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. The obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A filtering component, characterized in that, Comprising: A discharge electrode (1) and a ground electrode (2); A filter screen (3), the manufacturing material of which includes a dielectric material, is located between the discharge electrode (1) and the ground electrode (2) and is arranged opposite to the ground electrode (2). The distance between the discharge electrode (1) and the filter screen (3) is d1, where 0 ≤ d1 ≤ 20 mm; A plurality of first grooves (31) facing the discharge electrode (1) and second grooves (32) facing the ground electrode (2) are bent on the filter screen (3). The discharge electrode (1) includes a first insertion portion (11) inserted into the first grooves (31); The ground electrode (2) includes a second insertion portion (21) inserted into the second grooves (32); The first insertion portion (11) and the second insertion portion (21) are parallel to each other, and air is adapted to pass through between the first insertion portion (11) and the second insertion portion (21).

2. The filter assembly according to claim 1, wherein, The distance between the ground electrode (2) and the filter screen (3) is d2, where 0 ≤ d2 ≤ 5 mm.

3. The filtering component according to claim 1 or 2, characterized in that, The filter screen (3) is wavy.

4. The filter component according to claim 1, wherein The bottoms of the first grooves (31) and the bottoms of the second grooves (32) are both sharp-angled.

5. The filter assembly according to claim 1, wherein The discharge electrode (1) further includes a first frame (12), and the first insertion portion (11) is arranged on the first frame (12); The ground electrode (2) further includes a second frame (22), and the second insertion portion (21) is arranged on the second frame (22). A channel adapted for air to pass through is formed between the first frame (12) and the second frame (22).

6. The filter assembly according to claim 1, wherein The ground electrode (2) is arranged parallel to the filter screen (3).

7. The filtering component according to claim 1 or 2, characterized in that, The thickness of the filter screen (3) is any value in the range of 55 - 60 mm, and the discharge voltage of the discharge electrode (1) is any value in the range of 14 - 16 KV.

8. An air purification device, characterized in that, Comprising: A housing having an air inlet and an air outlet; The filtering assembly (100) according to any one of claims 1 to 7.

Images