air purification device

Abstract

This invention relates to an air purification device, comprising: a discharge module for discharging airborne particles to become charged; and a dust collection and sterilization module located downstream of the air flowing through the discharge module. The air purification device has a dust collection mode and a sterilization mode. In dust collection mode, the discharge module discharges, ionizing the air surrounding the module and charging the airborne particles. The air then carries the charged particles downstream to a dust collection plate, which controllably adsorbs the charged particles, thus collecting the airborne particles on the dust collection plate. In sterilization mode, the discharge module is turned off, and the dust collection plate itself performs micro-discharge sterilization. The high-energy plasma generated by the micro-discharge etches bacteria and viruses, effectively eliminating bacteria and viruses on the dust collection plate and preventing secondary infection of the user when the dust collection plate is disassembled for cleaning.

Description

Technical Field

[0001] This invention relates to the field of dust collection technology, and in particular to air purification devices. Background Technology

[0002] As people's demands for air quality increase, air purifiers have gradually entered the market. Currently, the air purifier market is mainly divided into three types: filter-type, electro-purification, and hybrid types. Among them, purifiers based on the electro-purification principle are the most efficient for disinfection and sterilization, as they can filter and sterilize microorganisms and viruses in the air through electrical discharge.

[0003] Currently, air purifiers that use either electrostatic purification or physical adsorption principles to purify air all share a common problem: while traditional air purifiers can adsorb and remove bacteria and viruses from the air, these bacteria and viruses ultimately accumulate on the surface of the filter and dust collection plate. This poses a risk of secondary infection when users recycle the filter or clean the dust collection plate. Summary of the Invention

[0004] Therefore, it is necessary to provide an air purification device to address the risk of secondary bacterial and viral infections that traditional air purifiers may pose to users.

[0005] An air purification device, the air purification device comprising:

[0006] Power module:

[0007] The discharge module is used to discharge and charge particles in the air.

[0008] The dust collection and sterilization module is located downstream of the air flowing through the discharge module;

[0009] The air purification device has a dust collection mode and a sterilization mode. In the dust collection mode, the power module controls the discharge module to discharge, and the dust collection and sterilization module adsorbs charged particles. In the sterilization mode, the power module controls the dust collection and sterilization module to perform micro-discharge sterilization.

[0010] The dust collection and sterilization module in the aforementioned air purifier includes a dust collection plate located downstream of the discharge module. The air purifier features both a dust collection module and a sterilization mode. In dust collection mode, the power module controls the discharge module to discharge, ionizing the air surrounding the module and charging airborne particles. The air then carries these charged particles downstream to the dust collection plate, which adsorbs and collects them, thus purifying the air. In sterilization mode, the power module controls the dust collection plate to perform micro-discharge sterilization, using the high-energy plasma generated by the micro-discharge to etch bacteria and viruses, effectively eliminating them from the dust collection plate. If the user needs to clean the dust collection plate after using the air purifier in dust collection mode for a period of time, they can first activate the sterilization mode to stop dust collection and sterilize the dust collection plate before removing it for cleaning. This prevents secondary infection of the user with bacteria and viruses during the cleaning process.

[0011] In one embodiment, the dust collection and sterilization module includes at least one dust collection plate; in the purification mode, the dust collection plate is controlled to adsorb charged particles; in the purification mode, the dust collection plate itself performs micro-discharge sterilization.

[0012] In one embodiment, each of the dust collection plates includes a first metal component, a sterilization component, and a second metal component, wherein the sterilization component is stacked between the first metal component and the second metal component;

[0013] In the dust collection mode, at least one of the first metal component and the second metal component is controlled to adsorb charged particles;

[0014] In the sterilization mode, there is a potential difference between the first metal component and the second metal component, and the one with the higher potential discharges to the one with the lower potential, inducing micro-discharge in the sterilization component.

[0015] In one embodiment, the power module includes a controller and a power supply communicatively connected to the controller;

[0016] In the dust collection mode, the controller controls one of the positive and negative terminals of the power supply to be electrically connected to the discharge module, and controls the other of the positive and negative terminals of the power supply to be electrically connected to the first metal component and / or the second metal component.

[0017] In the sterilization mode, the controller controls the positive and negative terminals of the power supply to be electrically connected to the first metal component and the second metal component, respectively.

[0018] In one embodiment, both the first metal component and the second metal component are metal meshes, and the sterilization component is made of a porous electret material.

[0019] In one embodiment, when the air purifier is in the dust collection mode, the discharge module is pressurized and discharged, and both the first metal component and the second metal component are grounded.

[0020] In one embodiment, the dust collection and sterilization module includes a plurality of dust collection plates, which are arranged side by side at intervals along a direction intersecting the airflow direction.

[0021] In one embodiment, the dust collection and sterilization module further includes an auxiliary electrode plate, which is disposed at a distance from any of the dust collection electrodes.

[0022] In the dust collection mode, a dust collection electric field is formed between the auxiliary electrode plate and the adjacent dust collection electrode plate, and the dust collection electric field drives charged particles to move toward the dust collection electrode plate.

[0023] In one embodiment, during the dust collection mode, the discharge module discharges to make the airborne particles positively charged, the auxiliary electrode plate has a high potential, and the dust collection electrode plate has a low potential; or

[0024] In the dust collection mode, the discharge module discharges to make the particles in the air negatively charged, the auxiliary electrode plate is at a low potential, and the dust collection electrode plate is at a high potential.

[0025] A dust collection plate includes a first metal part, a second metal part, and a sterilization part, wherein the sterilization part is stacked between the first metal part and the second metal part;

[0026] At least one of the first metal component and the second metal component adsorbs charged particles in the air, or a potential difference is formed between the first metal component and the second metal component, and the one with the higher potential discharges to the one with the lower potential, thereby inducing micro-discharge of the sterilization component.

[0027] In one embodiment, the first metal element and the second metal element are metal meshes, and the sterilization element is made of a porous electret material. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the air purification device from one perspective in one embodiment of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of the air purification device from another perspective;

[0030] Figure 3 for Figure 1 A schematic diagram of the dust collection electrode in the air purification device shown.

[0031] Figure 4 Here is a schematic diagram of the structure of an air purification device in another embodiment of the present invention.

[0032] Reference numerals: 100, air purification device; 10, discharge module; 11, tungsten filament; 30, dust collection and sterilization module; 32, dust collection electrode plate; 321, first metal component; 323, sterilization component; 325, second metal component; 34, auxiliary electrode plate; 40, power supply module; 50, power supply; 61, first wire; 63, second wire; 65, third wire. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figures 1-3 In one embodiment of the present invention, an air purification device 100 is provided, including a discharge module 10, a dust collection and sterilization module 30, and a power supply module 40. The discharge module 10 is used to discharge and charge particles in the air. The dust collection and sterilization module 30 is used to collect charged particles in the air and sterilize itself in a controlled manner. When cleaning the dust collection and sterilization module 30, the sterilization module will not carry bacteria and viruses, preventing users from being infected again. Optionally, the discharge module 10 includes a plurality of tungsten wires 11. When a high voltage is applied to the tungsten wires 11, the tips discharge and ionize the air, generating charged particles in the air. The charged particles combine with particles in the air, making the particles charged.

[0040] Specifically, the dust collection and sterilization module 30 is located downstream of the air flowing through the discharge module 10. Furthermore, the air purification device 100 has a dust collection mode and a sterilization mode. In dust collection mode, the power module 40 controls the discharge module 10 to discharge, ionizing the air surrounding the discharge module 10 and charging the air particles. The air then carries the charged particles downstream to the dust collection and sterilization module 30, where the charged particles are controlled to adsorb them, thus collecting the air particles and purifying the air. In sterilization mode, the power module 40 controls the dust collection and sterilization module 30 to perform micro-discharge sterilization, using the high-energy plasma generated by the micro-discharge to etch bacteria and viruses, effectively eliminating bacteria and viruses on the dust collection and sterilization module 30. When a user uses the air purifier 100, if the dust collection mode is used for a period of time and the dust collection and sterilization module 30 needs to be cleaned, the sterilization mode can be activated first to stop the air purifier 100 from collecting dust and sterilize the dust collection and sterilization module 30. After that, the dust collection and sterilization module 30 can be disassembled for cleaning to prevent the user from being infected with bacteria and viruses again during the cleaning process.

[0041] In some embodiments, when the air purifier 100 is in sterilization mode, the dust collection and sterilization module 30 is subjected to high-voltage corona discharge and induces its own micro-discharge. In this way, the dust collection and sterilization module 30 not only sterilizes through micro-discharge, but also ionizes the air when subjected to high-voltage corona discharge, generating active groups such as hydroxyl groups in the air to destroy bacteria and viruses on the dust collection and sterilization module 30 and inactivate them. That is, it also sterilizes and disinfects by ionizing the air.

[0042] In some embodiments, the dust collection and sterilization module 30 includes at least one dust collection plate 32. In purification mode, the dust collection plate 32 is controlled to adsorb charged particles; in purification mode, the dust collection plate 32 itself performs micro-discharge sterilization. In other words, the dust collection and sterilization module 30 includes a plurality of dust collection plates 32, through which dust collection and sterilization are performed.

[0043] Furthermore, each dust collection plate 32 includes a first metal element 321, a sterilization element 323, and a second metal element 325. The sterilization element 323 is stacked between the first metal element 321 and the second metal element 325, which is equivalent to the first metal element 321, the sterilization element 323, and the second metal element 325 being stacked sequentially. In dust collection mode, the discharge module 10 charges the particles in the air, and at least one of the first metal element 321 and the second metal element 325 is controlled to adsorb the charged particles, which is used to collect particulate matter such as dust, bacteria, and viruses in the air. Moreover, the sterilization plate has both the first metal element 321 and the second metal element 325, which can increase the dust collection area and improve the dust collection effect.

[0044] In sterilization mode, a potential difference exists between the first metal component 321 and the second metal component 325, with the higher potential component discharging corona to the lower potential component, inducing micro-discharge in the sterilization component 323. One of the first metal components 321 and 325 is supplied with a low voltage (e.g., grounded) to achieve a low potential, while the other is supplied with a high voltage to achieve a high potential and carry a high voltage charge. Thus, when one of the first metal components 321 and 325 is supplied with a high voltage, it discharges corona to the other, inducing a charge on the sterilization component 323 located between the first and second metal components 321 and 325. This charge accumulates on the sterilization component 323 during the corona discharge between the first and second metal components 321 and 325, inducing a micro-discharge phenomenon to eliminate bacteria and viruses on the entire dust collection plate 32.

[0045] Furthermore, both the first metal part 321 and the second metal part 325 are metal meshes, and the sterilization element 323 is made of a porous electret material. Since both the first metal part 321 and the second metal part 325 are constructed as metal meshes, and the metal mesh is woven from a single metal wire with an extremely small radius of curvature, applying high voltage will break down the air and cause corona discharge. Therefore, when high voltage is applied to one of the first metal part 321 or the second metal part 325, it is equivalent to one metal mesh causing a corona discharge to the other metal mesh through the sterilization element 323. At this time, a charge will be induced on the sterilization element 323 located between the two metal meshes. Under the action of the corona discharge, the charge accumulates on the surface of the porous electret material of the sterilization element 323. The accumulated charge forms an electric field within the small pore channels of the porous electret material. When the electric field strength exceeds the breakdown field strength of the pore gap, it will induce micro-discharge in the insulating pores, generating high-energy plasma. The ion velocity inside the high-energy plasma is extremely high, which can etch and inactivate bacteria and viruses. At the same time, when the metal mesh is subjected to high-voltage corona discharge, the active groups such as hydroxyl groups generated by the ionization of air can also destroy bacteria and viruses, causing them to become inactive.

[0046] In some embodiments, the power module 40 includes a controller (not shown) and a power supply 50 communicatively connected to the controller. In dust collection mode, the controller controls one of the positive and negative terminals of the power supply 50 to be electrically connected to the discharge module, and controls the other of the positive and negative terminals of the power supply 50 to be electrically connected to the first metal component 321 and / or the second metal component 325. This is equivalent to the discharge module being positively charged, acting as the anode to make airborne particles positively charged. The positively charged particles move and are adsorbed onto the first metal component 321 and / or the second metal component 325, which act as the cathode, thus enabling the dust collection and sterilization module 30 to adsorb the particles and achieve the dust collection function. Alternatively, the discharge module being negatively charged, acting as the cathode to make airborne particles negatively charged, allowing the negatively charged particles to move and be adsorbed onto the first metal component 321 and / or the second metal component 325, which act as the anode.

[0047] In sterilization mode, the positive and negative terminals of the controller control power supply 50 are electrically connected to the first metal component 321 and the second metal component 325 respectively, so as to form a potential difference between the first metal component 321 and the second metal component 325 to induce micro-discharge of the sterilization component 323. The energy generated by the micro-discharge etches the bacteria, viruses and other particles collected on the first metal component 321 and the second metal component 325, thereby realizing the sterilization function.

[0048] In one specific embodiment, when the air purifier 100 is in dust collection mode, the discharge module 10 is pressurized and discharged, and both the first metal component 321 and the second metal component 325 are grounded. Thus, if the discharge module 10 applies a positive high voltage, causing the air particles to become positively charged, the grounded first metal component 321 and the second metal component 325 act as negative electrodes when the air carrying these charged particles flows from the discharge module 10 to the dust collection electrode, attracting and collecting the particulate matter in the air. Conversely, if the discharge module 10 applies a negative high voltage, causing the air particles to become negatively charged, the grounded first metal component 321 and the second metal component 325 act as positive electrodes when the air carrying these charged particles flows from the discharge module 10 to the dust collection electrode, attracting and collecting the particulate matter in the air. Understandably, in dust collection mode, the first metal component 321 and the second metal component 325 can also be ungrounded and set to other voltage values, as long as they can attract nuclear-charged particles.

[0049] Furthermore, the power module also includes a first wire 61, a second wire 63, and a third wire 65. The first wire 61 connects the power supply 50 to the first metal component 321, the second wire 63 connects the power supply 50 to the second metal component 325, and the third wire 65 connects the power supply 50 to the discharge module 10. When there are multiple dust collection plates 32, the first wire 61 connects the power supply 50 to multiple first metal components 321, and the second wire 63 connects the power supply 50 to multiple second metal components 325.

[0050] When the air purifier 100 is in purification mode, the controller control power supply 50 provides high voltage to the third wire 65, so that the discharge module 10 ionizes the air with high voltage, charging the particles in the air. At the same time, the controller control power supply 50 provides the same low voltage (generally ground potential) to the first wire 61 and the second wire 63, for example, by grounding the first wire 61 and the second wire 63, so that the dust collection electrode can adsorb the charged particles in the air. When the air purifier 100 is in sterilization mode, the controller control power supply 50 no longer supplies power to the third wire 65, thereby turning off the discharge module 10. At the same time, the controller control power supply 50 provides a potential difference to the first wire 61 and the second wire 63, applying high voltage to one of the first metal component 321 and the second metal component 325 and low voltage to the other, so that the high voltage component of the first metal component 321 and the low voltage component of the second metal component 325 corona discharges, thereby inducing micro-discharge of the sterilization component 323, generating high-energy plasma for sterilization.

[0051] See Figure 1-3 In some embodiments, the dust collection and sterilization module 30 includes multiple dust collection plates 32, which are arranged side-by-side at intervals along a direction intersecting the airflow direction. By including multiple dust collection plates 32 in the dust collection and sterilization module 30, the multiple plates can be configured to collect dust simultaneously, improving purification efficiency. It is understood that the dust collection and sterilization module 30 may also include only one dust collection plate 32, achieving the same purification and sterilization functions; the number of dust collection plates 32 is not limited here.

[0052] See Figure 4 In other embodiments, the dust collection and sterilization module 30 further includes an auxiliary electrode plate 34, which is disposed at a distance from any of the dust collection electrodes 32. In dust collection mode, a dust collection electric field is formed between the auxiliary electrode plate 34 and the adjacent dust collection electrodes 32. When air carrying charged particles enters the dust collection electric field, the electric field drives the charged particles to move towards the dust collection electrodes 32, thereby collecting dust on the dust collection electrodes 32. Similarly, in sterilization mode, the dust collection electrodes 32 can be sterilized by causing micro-discharge. In this way, secondary infection of users with bacteria and viruses is prevented when cleaning the dust collection electrodes 32 later. The auxiliary electrode plate 34 is a metal electrode plate.

[0053] Optionally, the dust collection and sterilization module 30 includes multiple dust collection plates 32 and multiple auxiliary plates 34. The multiple dust collection plates 32 and multiple auxiliary plates 34 are arranged side by side and staggered. Each dust collection plate 32 is located between two auxiliary plates 34. Each dust collection plate 32 and the two auxiliary plates 34 on both sides form two dust collection electric fields, thereby improving the dust collection effect. Understandably, both dust collection plates 32 and auxiliary plates 34 can also be set to one each; the number of both is not limited here.

[0054] Furthermore, in dust collection mode, the discharge module 10 discharges to make the air particles positively charged, the auxiliary electrode 34 is at a high potential, and the dust collection electrode 32 is at a low potential. Thus, when positively charged particles enter the dust collection electric field, they move towards the dust collection electrode 32, which acts as the cathode, under the influence of the electric field force and are adsorbed and collected by the dust collection electrode 32, achieving the dust collection function. Alternatively, in dust collection mode, the discharge module 10 discharges to make the air particles negatively charged, the auxiliary electrode 34 is at a low potential, and the dust collection electrode 32 is at a high potential. Thus, when air carrying negatively charged particles enters the dust collection electric field, the negatively charged particles move towards the base electrode, which acts as the anode, under the influence of the electric field force and are adsorbed and collected by the dust collection electrode 32, achieving the dust collection function.

[0055] Based on the same concept, in one embodiment of the present invention, a dust collection electrode plate 32 is also provided. The dust collection electrode plate 32 includes a first metal component 321, a sterilization component 323, and a second metal component 325. The sterilization component 323 is stacked between the first metal component 321 and the second metal component 325, which is equivalent to the first metal component 321, the sterilization component 323, and the second metal component 325 being stacked sequentially. At least one of the first metal component 321 and the second metal component 325 adsorbs charged particles; or a potential difference is formed between the first metal component 321 and the second metal component 325, and the one with the higher potential discharges corona discharge to the one with the lower potential, inducing micro-discharge in the sterilization component 323.

[0056] In dust collection mode, the discharge module 10 charges airborne particles, and at least one of the first metal component 321 and the second metal component 325 adsorbs the charged particles to collect particulate matter such as dust, bacteria, and viruses from the air, achieving a dust collection effect. Optionally, both the first metal component 321 and the second metal component 325 adsorb charged particles to increase the dust collection area and improve the dust collection effect.

[0057] In sterilization mode, a potential difference exists between the first metal component 321 and the second metal component 325, with the higher potential component discharging corona to the lower potential component, inducing micro-discharge in the sterilization component 323. One of the first metal components 321 and 325 is supplied with a low voltage (e.g., grounded) to achieve a low potential, while the other is supplied with a high voltage to achieve a high potential and carry a high voltage charge. Thus, when one of the first metal components 321 and 325 is supplied with a high voltage, it discharges corona to the other, inducing a charge on the sterilization component 323 located between the first and second metal components 321 and 325. This charge accumulates on the sterilization component 323 during the corona discharge between the first and second metal components, inducing a micro-discharge phenomenon to eliminate bacteria and viruses on the entire dust collection plate 32.

[0058] Furthermore, both the first metal component 321 and the second metal component 325 are metal meshes, and the sterilization component 323 is made of a porous electret material. Since both the first metal component 321 and the second metal component 325 are constructed as metal meshes, and these meshes are woven from metal wires with extremely small radii of curvature, applying high voltage will cause air breakdown and corona discharge. Therefore, when high voltage is applied to one of the first metal component 321 or the second metal component 325, it is equivalent to one metal mesh causing corona discharge to the other metal mesh through the sterilization component 323. At this time, a charge will be induced on the sterilization component 323 located between the two metal meshes. Under the action of the corona discharge, the charge accumulates on the surface of the porous electret material of the sterilization component 323. The accumulated charge forms an electric field within the small pore channels of the porous electret material. When the electric field strength exceeds the breakdown field strength of the pore gap, it will induce micro-discharge in the insulating pores, generating high-energy plasma. The ion velocity inside the high-energy plasma is extremely high, which can etch and inactivate bacteria and viruses. At the same time, when the metal mesh is subjected to high-voltage corona discharge, the active groups such as hydroxyl groups generated by the ionization of air can also destroy bacteria and viruses, causing them to become inactive.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An air purification device, characterized in that, The air purification device includes: Power module; The discharge module (10) is used to discharge and charge particles in the air; The dust collection and sterilization module (30) is located downstream of the air flowing through the discharge module (10). The dust collection and sterilization module (30) includes at least one dust collection electrode plate and an auxiliary electrode plate (34). The auxiliary electrode plate (34) is arranged at intervals relative to any of the dust collection electrodes. Each dust collection electrode plate includes a first metal part (321), a sterilization part (323), and a second metal part (325). The sterilization part (323) is stacked between the first metal part (321) and the second metal part (325). The air purification device has a dust collection mode and a sterilization mode. In the dust collection mode, the power module controls the discharge module (10) to discharge, and a dust collection electric field is formed between the auxiliary electrode plate (34) and the adjacent dust collection electrode plate. The dust collection electric field drives charged particles to move toward the dust collection electrode plate, and at least one of the first metal part (321) and the second metal part (325) is controlled to adsorb charged particles. In the sterilization mode, the power module controls the potential difference between the first metal part (321) and the second metal part (325), and the one with the higher potential discharges to the one with the lower potential, and induces the sterilization part (323) to micro-discharge and sterilize.

2. The air purification device according to claim 1, characterized in that, The power module includes a controller and a power supply that is communicatively connected to the controller. In the dust collection mode, the controller controls one of the positive and negative terminals of the power supply to be electrically connected to the discharge module, and controls the other of the positive and negative terminals of the power supply to be electrically connected to the first metal component and / or the second metal component. In the sterilization mode, the controller controls the positive and negative terminals of the power supply to be electrically connected to the first metal component and the second metal component, respectively.

3. The air purification device according to claim 1, characterized in that, The first metal part (321) and the second metal part (325) are both metal meshes, and the sterilization part (323) is made of porous electret material.

4. The air purification device according to claim 1, characterized in that, When the air purifier is in the dust collection mode, the discharge module (10) is pressurized and discharged, and the first metal part (321) and the second metal part (325) are both grounded.

5. The air purification device according to any one of claims 1-4, characterized in that, The dust collection and sterilization module (30) includes multiple dust collection plates, which are arranged side by side at intervals along a direction intersecting the airflow direction.

6. The air purification device according to claim 1, characterized in that, In the dust collection mode, the discharge module (10) discharges to make the air particles positively charged, the auxiliary electrode (34) has a high potential, and the dust collection electrode has a low potential; or In the dust collection mode, the discharge module (10) discharges to make the particles in the air negatively charged, the auxiliary electrode (34) is at a low potential, and the dust collection electrode is at a high potential.

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