Air Purification Device

Abstract

The present invention relates to the technical field of air purification, and specifically to an air purification device, comprising: a first shell; a second shell is arranged in the first shell, the second shell is made of conductive material, suitable for connecting to the grounding electrode of the first power supply, and a plurality of through holes are arranged at intervals on the second shell; a first discharge needle is arranged in the second shell, one end is arranged opposite to the through hole, and the other end is suitable for connecting to the positive or negative electrode of the first power supply; a second discharge needle is arranged in the second shell, at least corresponding to the air inlet, and is arranged at intervals with the first discharge needle, suitable for connecting to the second power supply, and the polarity of the second discharge needle is opposite to that of the first discharge needle. The air entering from the air inlet passes through the second discharge needle, and the particles such as bacteria and viruses in the air are charged, and the particles that are not charged will be charged by the electric field with opposite polarity when they continue to meet the first discharge needle with the air, and the particles with opposite charges attract each other, and release energy when they collide during neutralization, killing bacteria and viruses, thereby improving the efficiency of disinfection and sterilization.

Description

Technical Field

[0001] The invention relates to the technical field of air purification, and in particular to an air purification device. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the quality of life. People hope to breathe purified air more, and therefore put forward higher disinfection and sterilization requirements for air purifiers.

[0003] The prior art discloses an air purifier, which connects positive electricity to the electrode needle through a high-voltage power supply, and negative electricity to the metal plate, and the two form a pinhole circular tube discharge field. The air entering from the air purifier entrance is ionized by the electrode needle, so that positively charged viruses and bacteria are positively charged, and then enter the pinhole circular tube discharge field with the airflow, and are attracted by the negative pole of the electric field, quickly move to the negative pole of the electric field, and are effectively adsorbed, so that the purified air is blown out from the outlet of the air purifier. However, the air purifier with this structure can only adsorb viruses and bacteria on the negative pole metal plate, and the efficiency of disinfection and sterilization is not high. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low disinfection and sterilization efficiency of air purifiers in the prior art, thereby providing an air purification device with high disinfection and sterilization efficiency.

[0005] In order to solve the above problems, the present invention provides an air purification device, comprising:

[0006] A first housing having an air inlet and an air outlet;

[0007] A second shell is disposed inside the first shell, the second shell is made of a conductive material and is suitable for connecting to the ground electrode of the first power supply, a plurality of through holes are provided at intervals on the second shell, and the second shell is connected to the air inlet and the air outlet;

[0008] A first discharge needle is disposed in the second housing, one end of which is arranged opposite to the through holes, and the other end of which is suitable for connecting to the positive electrode or the negative electrode of the first power source;

[0009] The second discharge needle is arranged in the second shell and at least corresponds to the air inlet. The second discharge needle is arranged at an interval with the first discharge needle and is suitable for connecting to a second power supply. The polarity of the second discharge needle is opposite to that of the first discharge needle.

[0010] Furthermore, the air purification device also includes:

[0011] The first connection structure is disposed in the second shell, one end of which is suitable for being connected to the first power source, and the first connection structure is connected to a plurality of the first discharge needles.

[0012] Furthermore, the first connection structure extends along the height direction of the second shell and is arranged in the middle of the second shell.

[0013] Furthermore, the through holes are evenly arranged in multiple rows and columns on the peripheral wall of the second shell, and the first discharge needles are evenly arranged in multiple rows and columns on the first connecting structure. The first discharge needles are arranged one by one opposite to the centers of the through holes.

[0014] Furthermore, the air purification device also includes:

[0015] The connecting terminal is fixedly connected to the first shell or the second shell, one end of which is connected to the first connecting structure, and the other end of which is suitable for connecting to the first power source.

[0016] Furthermore, the connecting terminal is made of high-voltage-resistant plastic or ceramic material.

[0017] Furthermore, the air purification device also includes:

[0018] At least one second connection structure is fixedly connected to the first shell or the second shell, one end of the second connection structure is connected to the second discharge needle, and the other end is suitable for connecting to the second power supply.

[0019] Furthermore, there are two second connection structures, one of which is arranged at one end of the second shell body close to the air inlet, and the other is arranged at the other end of the second shell body, and the first discharge needle is arranged between the two second connection structures.

[0020] Furthermore, one of the second connection structures is a hollow structure, and the connection terminal is connected inside the hollow structure.

[0021] Furthermore, the air inlet is arranged at the bottom end of the first shell, and the air outlet is arranged on the top end and / or the peripheral wall of the first shell.

[0022] Furthermore, the air purification device also includes:

[0023] The filtering device is arranged on a side of the second connecting structure away from the second shell, and / or is arranged between the first shell and the second shell.

[0024] Furthermore, the filtering device is a high pressure resistant plastic filter.

[0025] Furthermore, the filter screen is made of polytetrafluoroethylene.

[0026] Furthermore, the air purification device also includes:

[0027] A first controller, connected to the first power supply, and configured to periodically control the polarity of the first discharge needle to be positive or negative;

[0028] The second controller is connected to the second power supply and is used for periodically controlling the polarity of the second discharge needle to be negative or positive.

[0029] Furthermore, the air purification device is an air purifier.

[0030] The technical solution of the present invention has the following advantages:

[0031] 1. The air purification device provided by the present invention is provided with a second shell in the first shell, the second shell is made of conductive material and connected to the grounding electrode of the first power supply, a plurality of through holes are arranged at intervals on the second shell, one end of the first discharge needle is arranged opposite to the through holes, and the other end is connected to the positive electrode or the negative electrode of the first power supply, so that a pinhole discharge structure is formed between the through hole of the second shell and the first discharge needle, and because a second discharge needle is arranged at a position corresponding to the air inlet in the second shell, and the polarity of the second discharge needle is opposite to that of the first discharge needle, the air entering from the air inlet passes through the second discharge needle, and the air in the air is discharged by the second discharge needle. The particles such as bacteria and viruses are charged, and the uncharged particles and microorganisms continue to flow with the air in the second shell and encounter the first discharge needle, and will be charged by the electric field with opposite polarity. Since the polarities of the first discharge needle and the second discharge needle are opposite and both are needle-shaped structures, the charged particles will not be adsorbed on the discharge needles of opposite charges, but will attract particles with opposite charges. The collision during neutralization can release energy to kill bacteria and viruses, and the purified air is discharged from the air outlet, which greatly improves the disinfection efficiency. The combination of the two opposite electric fields solves the problem of static electricity accumulation.

[0032] 2. The air purification device provided by the present invention, by arranging the first connection structure in the second shell, makes the arrangement of the plurality of first discharge needles more compact and the overall structure of the air purification device more regular.

[0033] 3. The air purification device provided by the present invention extends the first connecting structure along the height direction of the second shell and is located in the middle of the second shell, so that multiple first discharge needles can radiate from the middle of the second shell to the surrounding areas, and can discharge as much air as possible inside the second shell.

[0034] 4. The air purification device provided by the present invention has multiple rows and columns of through holes evenly arranged on the peripheral wall of the second shell, and multiple rows and columns of first discharge needles evenly arranged on the first connecting structure, and the first discharge needles are arranged one by one opposite to the centers of the through holes. In this way, the charge of the pinhole discharge structure can be more uniform, so that more particulate matter in the air is charged, thereby improving the purification efficiency.

[0035] 5. The air purification device provided by the present invention facilitates the connection between the first connection structure and the first power supply by providing a connection terminal.

[0036] 6. The air purification device provided by the present invention facilitates the connection between the second discharge needle and the second power supply by providing a second connection structure.

[0037] 7. The air purification device provided by the present invention has two second connecting structures, and the two second connecting structures are relatively arranged in the second shell, and a first discharge needle is provided between the two second connecting structures, so that the air entering the second shell from the air inlet can basically flow through the first discharge needle or the second discharge needle, which can maximize the charging and maximize the collision neutralization of positive and negative particles, thereby providing sterilization and disinfection efficiency.

[0038] 8. The air purification device provided by the present invention, by configuring the second connection structure as a hollow structure, and connecting terminals are connected inside the hollow structure, so that the second connection structure and the connecting terminals are configured more compactly, and the overall volume of the air purification device is smaller.

[0039] 9. The air purification device provided by the present invention is provided with a filtering device, so that the purified air after sterilization and disinfection can be further filtered through the filtering device, so that the particulate matter flowing with the air can be collected by the filtering device to prevent it from flowing into the room again.

[0040] 10. The air purification device provided by the present invention, by setting the filter material to polytetrafluoroethylene, makes it easy to wash the filter after collecting dust for a long time, so that it can be recycled many times, reducing the replacement cost.

[0041] 11. The air purification device provided by the present invention, by setting a first controller connected to the first power supply and a second controller connected to the second power supply, makes the polarity of the first discharge needle and the second discharge needle periodically positive or negative, and can realize the alternation of positive and negative corona of the first discharge needle and the second discharge needle, prevent excessive accumulation of the same kind of charges, increase the efficiency of purification, sterilization and disinfection, avoid the problem of static electricity sparking on the surface of the device, reduce electrical corrosion, and reduce material aging. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 is a cross-sectional view of an air purification device of the present invention;

[0044] Figure 2 It is a top view of the air purification device of the present invention.

[0045] Description of reference numerals:

[0046] 1-first discharge needle; 2-second discharge needle; 3-second shell; 4-filter device; 5-first shell; 6-through hole; 7-second connection structure; 8-first connection structure; 9-connection terminal. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] like Figure 1-Figure 2 As shown, an air purification device is provided in this embodiment, including: a first shell 5, having an air inlet and an air outlet; a second shell 3, arranged in the first shell 5, the second shell 3 is made of conductive material, suitable for connecting to the ground electrode of the first power supply, and a plurality of through holes 6 are arranged at intervals on the second shell 3, and the second shell 3 is connected to the air inlet and the air outlet; a first discharge needle 1, arranged in the second shell 3, one end of which is arranged one by one with the through holes 6, and the other end of which is suitable for connecting to the positive or negative electrode of the first power supply; a second discharge needle 2, arranged in the second shell 3, and at least arranged corresponding to the air inlet, the second discharge needle 2 is arranged at intervals with the first discharge needle 1, suitable for connecting to the second power supply, and the polarity of the second discharge needle 2 is opposite to that of the first discharge needle 1.

[0052] The second housing 3 is arranged in the first housing 5. The second housing 3 is made of a conductive material and is connected to the ground electrode of the first power supply. A plurality of through holes 6 are arranged at intervals on the second housing 3. One end of the first discharge needle 1 is arranged opposite to the through holes 6 one by one, and the other end is connected to the positive electrode or the negative electrode of the first power supply, so that a pinhole discharge structure is formed between the through hole 6 of the second housing 3 and the first discharge needle 1. Since the second discharge needle 2 is arranged at a position corresponding to the air inlet in the second housing 3, and the polarity of the second discharge needle 2 is opposite to that of the first discharge needle 1, the air entering from the air inlet passes through the second discharge needle 2, and the fine particles in the air are discharged. Bacteria, viruses and other particles are charged, and uncharged particles and microorganisms continue to flow with the air in the second shell 3 and encounter the first discharge needle 1, and will be charged by the electric field with opposite polarity. Since the polarities of the first discharge needle 1 and the second discharge needle 2 are opposite and both are needle-shaped structures, the charged particles will not be adsorbed on the discharge needles of opposite charges, but will attract particles with opposite charges. The collision during neutralization can release energy to kill bacteria and viruses, and the purified air is discharged from the air outlet, which greatly improves the disinfection efficiency. The combination of the two opposite electric fields solves the problem of static electricity accumulation.

[0053] Specifically, the air purification device in this embodiment is an air purifier, the first shell 5 is the shell of the air purifier, the bottom of the first shell 5 is provided with an air inlet, the peripheral wall is provided with an air outlet, the second shell 3 is a metal cylinder arranged in the shell, the metal cylinder is provided with an opening at a position opposite to the air inlet, and the peripheral wall of the metal cylinder is provided with a plurality of through holes 6 at intervals, which are connected to the air outlet. As a convertible embodiment, it can also be that the air inlet of the air purifier is arranged at the bottom of the first shell 5, and the air outlet is arranged at the top of the first shell 5, or the air inlet is arranged on the peripheral wall of the first shell 5, and the air outlet is arranged at the top of the first shell 5. As a convertible embodiment, it can also be that the material of the second shell 3 is any other conductive material, and there is no excessive restriction here. As a convertible embodiment, it can also be that the second shell 3 is a metal square cylinder, or is specifically set according to the shape of the first shell 5. As a convertible embodiment, it can also be that the air purification device is a structure for purifying air of an air conditioner, and the first shell 5 is the shell of the structure for purifying air.

[0054] The first discharge needle 1 and the second discharge needle 2 are both needles with a small curvature radius as discharge electrodes, so that a very low voltage can be applied to achieve the charging effect and zero ozone. Specifically, the second discharge needle 2 is a needle electrode of a negative ion generator.

[0055] like Figure 1 As shown, the air purifier further includes: a first connection structure 8, which is arranged in the second shell 3, one end of which is suitable for connecting to the first power supply, and a plurality of first discharge needles 1 are connected to the first connection structure 8. By arranging the first connection structure 8 in the second shell 3, the arrangement of the plurality of first discharge needles 1 is more compact, and the overall structure of the air purifier is more regular.

[0056] Specifically, the first connection structure 8 is a conductive connection column, which extends along the height direction of the second shell 3 and is arranged in the middle of the second shell 3. By extending the first connection structure 8 along the height direction of the second shell 3 and being located in the middle of the second shell 3, a plurality of first discharge needles 1 can be spread out from the middle of the second shell 3 to the surroundings, and can discharge as much as possible to the air inside the second shell 3. As a convertible embodiment, the first connection structure 8 can also extend in a direction perpendicular to the height of the second shell 3, such as a horizontal direction, and a plurality of first discharge needles 1 are arranged thereon to spread out to the surroundings.

[0057] like Figure 1 and Figure 2 As shown, multiple rows and columns of through holes 6 are evenly arranged on the peripheral wall of the second shell 3, that is, multiple rows and columns of through holes 6 are evenly arranged on the peripheral wall of the metal cylinder, wherein: Figure 1The through hole 6 in the middle part is a through hole 6 on the peripheral wall facing away from the paper surface, and multiple rows and columns of first discharge needles 1 are evenly arranged on the first connection structure 8, that is, multiple first discharge needles 1 are arranged crosswise on the first connection structure 8, and the first discharge needles 1 are arranged one by one opposite to the center of the through hole 6. By evenly arranging multiple rows and columns of through holes 6 on the peripheral wall of the second shell 3, evenly arranging multiple rows and columns of first discharge needles 1 on the first connection structure 8, and the first discharge needles 1 are arranged one by one opposite to the center of the through hole 6, the pinhole discharge structure can be charged more evenly, so that more particles in the air are charged, and the purification efficiency is improved.

[0058] In order to facilitate the connection between the first connecting structure 8 and the first power supply, the air purifier also includes: a connecting terminal 9, which is fixedly connected to the second shell 3, one end of which is connected to the first connecting structure 8, and the other end is suitable for connecting to the first power supply. Specifically, the connecting terminal 9 is made of a high-voltage resistant plastic material. As a convertible embodiment, it is also possible that the connecting terminal 9 is fixedly connected to the first shell 5. As a convertible embodiment, it is also possible that the air purifier does not include the connecting terminal 9. As a convertible embodiment, it is also possible that the connecting terminal 9 is made of a high-voltage resistant ceramic material, or the connecting terminal 9 is air.

[0059] In order to facilitate the connection between the second discharge needle 2 and the second power supply, the air purifier further includes: at least one second connection structure 7, fixedly connected to one end of the second housing 3 near the air inlet, one end of the second connection structure 7 is connected to the second discharge needle 2, and the other end is suitable for connecting to the second power supply. Specifically, the second connection structure 7 is a connection column. As a convertible embodiment, it is also possible that the second connection structure 7 is fixedly connected to the first housing 5.

[0060] Specifically, there are two second connection structures 7, one of which is arranged at the opening of the second shell 3, that is, the bottom end of the second shell 3, and the other is arranged at the top end of the second shell 3, and a first discharge needle 1 is arranged between the two second connection structures 7. By setting two second connection structures 7, and the two second connection structures 7 are relatively arranged in the second shell 3, and the first discharge needle 1 is arranged between the two second connection structures 7, the air entering the second shell 3 from the air inlet can basically flow through the first discharge needle 1 or the second discharge needle 2, which can maximize the charging and maximize the collision neutralization of positive and negative particles, thereby providing sterilization and disinfection efficiency. As a convertible embodiment, it is also possible to set a second connection structure 7, which is fixedly connected to the end of the second shell 3 near the air inlet.

[0061] The second connection structure 7 disposed at the top of the second shell 3 is a hollow structure, and the connection terminal 9 is connected in the hollow structure. By setting the second connection structure 7 as a hollow structure, and connecting the connection terminal 9 in the hollow structure, the second connection structure 7 and the connection terminal 9 are arranged more compactly, and the overall volume of the air purifier is smaller.

[0062] In the actual installation process, since the second connection structure 7 and the connection terminal 9 are both conductive structures, insulating material can be set between the two for isolation, or the connection terminal 9 can be directly set to a structure in which the outer shell is made of ceramic material and a metal column is provided inside. No excessive restrictions are made here.

[0063] Since the air inlet of the air purifier is arranged at the bottom of the shell, and the air outlet is arranged on the peripheral wall, Figure 1 As shown, the air purifier further includes: a filter device 4, which is arranged between the peripheral wall of the first shell 5 and the peripheral wall of the second shell 3. By setting the filter device 4, the purified air after sterilization and disinfection can be further filtered through the filter device 4 after being charged through the first discharge needle 1 and the second discharge needle 2, so that the particulate matter flowing with the air can be collected by the filter device 4 to prevent it from flowing into the room again. As a convertible embodiment, it can also be that when the air inlet of the air purifier is arranged at the bottom of the shell and the air outlet is arranged at the top of the shell, the filter device 4 is arranged on the side of the second connection structure 7 away from the second shell 3.

[0064] There are many specific forms of the filter device 4. The filter device 4 in this embodiment is a high-pressure resistant plastic filter. Specifically, the filter is made of polytetrafluoroethylene. By setting the filter material to polytetrafluoroethylene, the filter can be easily washed after a long period of dust collection, so that it can be recycled many times, reducing the replacement cost.

[0065] The air purifier also includes: a first controller, connected to the first power supply, for periodically controlling the polarity of the first discharge needle 1 to be positive or negative; a second controller, connected to the second power supply, for periodically controlling the polarity of the second discharge needle 2 to be negative or positive. By setting the first controller connected to the first power supply and the second controller connected to the second power supply, the polarity of the first discharge needle 1 and the second discharge needle 2 is periodically positive or negative, and the first discharge needle 1 and the second discharge needle 2 can realize alternating positive and negative corona, prevent excessive accumulation of the same charge, increase the efficiency of purification, sterilization and disinfection, and avoid the problem of static electricity sparking on the surface of the equipment, reduce electrical corrosion, and reduce material aging. Of course, the first controller and the second controller can also be controllers inside the first power supply and the second power supply, so that the polarity of the first power supply and the second power supply changes periodically, and can be set according to actual conditions, such as setting it as a pulse power supply, and there is no excessive restriction here.

[0066] During use of the air purifier, the air to be purified entering from the air inlet enters the second shell 3 through the opening at the bottom of the second shell 3, and is charged by the second discharge needle 2 connected by the second connection structure 7 at the opening. When the air continues to flow in the second shell 3, it will also be charged by the first discharge needle 1 in the second shell 3. Since the polarity of the second discharge needle 2 and the first discharge needle 1 are opposite, the particles in the air will be charged with opposite charges. When the opposite charges are neutralized, energy can be released, which is sufficient to kill various pathogenic microorganisms in the air. Moreover, since the second discharge needle 2 is arranged at both the upper and lower ends of the second shell 3, the first discharge needle 1 is also arranged in the second shell 3, so that the air flowing in the second shell 3 can be charged to the maximum extent, which greatly improves the efficiency of sterilization and disinfection. The killed pathogenic microorganisms will flow through the filter device 4 as the air flows, and after being collected by the filter device 4, the purified air will flow out from the air outlet and be supplied to the room.

[0067] At the same time, the pinhole discharge structure formed by the first discharge needle 1 and the through hole 6 on the second housing 3 can control the applied voltage to a very low value, so that charging can be achieved without generating ozone. In addition, since the first controller and the second controller are provided, the polarity of the first power supply and the second power supply can be controlled, that is, the polarity of the first discharge needle 1 and the second discharge needle 2 can be controlled to change periodically, and the polarities of the two are always opposite, so that the alternation of positive and negative electricity can be achieved, and the accumulation of the same kind of charge can be prevented, and the problem of ignition and ozone can be prevented.

[0068] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An air purification device, characterized in that: include: A first housing (5) having an air inlet and an air outlet; A second shell (3) is arranged inside the first shell (5); the second shell (3) is made of a conductive material and is suitable for being connected to the grounding electrode of the first power source; a plurality of through holes (6) are arranged at intervals on the second shell (3); and the second shell (3) is connected to the air inlet and the air outlet; A first discharge needle (1) is disposed in the second housing (3), one end of which is arranged opposite to the through hole (6) and the other end of which is suitable for connecting to the positive electrode or the negative electrode of the first power source; A second discharge needle (2) is arranged in the second shell (3) and is at least arranged corresponding to the air inlet. The second discharge needle (2) is arranged at a distance from the first discharge needle (1) and is suitable for being connected to a second power source. The polarity of the second discharge needle (2) is opposite to that of the first discharge needle (1). A first connection structure (8), arranged in the second shell (3), one end of which is suitable for being connected to the first power source, and a plurality of the first discharge needles (1) are connected to the first connection structure (8); at least one second connection structure (7) fixedly connected to the first shell (5) or the second shell (3), one end of the second connection structure (7) being connected to the second discharge needle (2), and the other end being suitable for being connected to the second power source; The peripheral wall of the second shell (3) is evenly provided with multiple rows and columns of the through holes (6), and the first connecting structure (8) is evenly provided with multiple rows and columns of the first discharge needles (1), and the first discharge needles (1) are arranged one by one opposite to the centers of the through holes (6).

2. The air purification device according to claim 1, characterized in that: The first connection structure (8) extends along the height direction of the second shell (3) and is arranged in the middle of the second shell (3).

3. The air purification device according to any one of claims 1 to 2, characterized in that: Also includes: A connecting terminal (9) is fixedly connected to the first shell (5) or the second shell (3), one end of which is connected to the first connecting structure (8) and the other end of which is suitable for connecting to the first power source.

4. The air purification device according to claim 3, characterized in that: The connecting terminal (9) is made of high-voltage-resistant plastic or ceramic material.

5. The air purification device according to claim 3, characterized in that: There are two second connection structures (7), one of which is arranged at one end of the second shell (3) close to the air inlet, and the other is arranged at the other end of the second shell (3), and the first discharge needle (1) is arranged between the two second connection structures (7).

6. The air purification device according to claim 5, characterized in that: One of the second connection structures (7) is a hollow structure, and the connection terminal (9) is connected inside the hollow structure.

7. The air purification device according to claim 1, characterized in that: The air inlet is arranged at the bottom end of the first shell (5), and the air outlet is arranged at the top end and / or the peripheral wall of the first shell (5).

8. The air purification device according to claim 7, characterized in that: The air purification device also includes: The filtering device (4) is arranged on a side of the second connecting structure (7) away from the second shell (3), and / or is arranged between the first shell (5) and the second shell (3).

9. The air purification device according to claim 8, characterized in that: The filtering device (4) is a high-pressure resistant plastic filter.

10. The air purification device according to claim 9, characterized in that: The filter screen is made of polytetrafluoroethylene.

11. The air purification device according to any one of claims 1 to 2, characterized in that: Also includes: A first controller, connected to the first power source, for periodically controlling the polarity of the first discharge needle (1) to be positive or negative; A second controller is connected to the second power supply and is used to periodically control the polarity of the second discharge needle (2) to be negative or positive.

12. The air purification device according to any one of claims 1 to 2, characterized in that: The air purification device is an air purifier.

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