Air purifying device and self-cleaning method thereof

Abstract

The application relates to an air purification device and a self-cleaning method thereof, the air purification device comprising a filter screen assembly, a dust removal assembly which is arranged at intervals from the filter screen assembly and has a dust suction port facing the filter screen assembly, an image acquisition unit which is arranged on one side of the filter screen assembly and is used for acquiring image information of the filter screen assembly, and a control assembly which is in communication connection with the image acquisition unit and the dust removal assembly respectively and is used for acquiring the cleanliness of the filter screen assembly through the image information and controlling the working state of the dust removal assembly according to the cleanliness. When the filter screen assembly needs to be cleaned, the dust removal assembly can adsorb impurities on the filter screen through the dust suction port, so that the automatic cleaning and purification of the filter screen assembly are realized, the service life of the filter screen assembly is prolonged, the air inflow of the air purification device is ensured, and the purification effect of the air purification device is improved.

Description

Technical Field

[0001] This application relates to the field of air purification technology, and in particular to an air purification device and its self-cleaning method. Background Technology

[0002] With social progress and improved living standards, people's requirements for living and working environments are gradually increasing. Air purifiers are being used more and more widely in people's living environments. Existing air purifiers are usually composed of a pre-filter, a room temperature catalytic filter, and a high-efficiency filter, which can collect dust, pollen, and harmful substances such as formaldehyde in the air, thereby purifying indoor air.

[0003] However, during long-term use of air purifiers, the pre-filter can become clogged with lint, dust, and other foreign objects and is difficult to clean, resulting in reduced airflow. Furthermore, the dust and lint deposited on the pre-filter can also cause the growth of bacteria, thus reducing the air purification effect of the air purifier. Summary of the Invention

[0004] Therefore, it is necessary to provide an air purification device and its self-cleaning method to address the problem of air purifier filters being difficult to clean due to the accumulation of dust, lint, and other foreign matter.

[0005] An air purification device, comprising:

[0006] Filter assembly;

[0007] A dust removal assembly, spaced apart from the filter assembly, the dust removal assembly having a first suction port facing the filter assembly; and

[0008] An image acquisition unit is disposed on one side of the filter assembly and is used to acquire image information of the filter assembly;

[0009] The control component is communicatively connected to both the image acquisition unit and the dust removal component, and is used to acquire the cleanliness of the filter component through the image information, and control the working state of the dust removal component according to the cleanliness.

[0010] In one embodiment, the air purification device further includes a filter drive assembly, which is tractively connected to the filter assembly and is used to drive the filter assembly to rotate.

[0011] In one embodiment, the dust removal assembly has a plurality of first suction ports, all of which are spaced apart along the rotation axis of the filter assembly.

[0012] In one embodiment, the dust removal assembly includes an external air duct, the central axis of which is parallel to the rotation axis of the filter assembly, and the first dust suction port is formed on the wall of the external air duct.

[0013] In one embodiment, the dust removal assembly further includes an inner air duct, which is housed within the outer air duct and coaxially arranged with the outer air duct. A dust suction channel is formed within the inner air duct, and the dust suction channel is selectively connected to one of the first dust suction ports.

[0014] In one embodiment, the inner air duct is provided with a plurality of second dust suction ports that communicate with the dust suction channel. All the second dust suction ports are arranged at intervals in the axial direction of the inner air duct and at intervals in the circumferential direction of the inner air duct.

[0015] The inner air duct can be controlled to rotate around its own central axis, so that one of the second dust suction ports is connected to one of the first dust suction ports, and the remaining second dust suction ports are connected to the wall of the outer air duct.

[0016] In one embodiment, the dust removal assembly further includes a dust removal drive unit, which is connected to the inner air duct and is used to drive the inner air duct to rotate around its own central axis.

[0017] In one embodiment, the dust removal assembly further includes a dust collection unit and a dust suction unit, the dust collection unit being connected between the dust suction channel and the dust suction unit.

[0018] In one embodiment, the air purification device includes a plurality of image acquisition units, all of which are sequentially mounted on the dust removal assembly along the rotation axis of the filter assembly.

[0019] A self-cleaning method for the above-mentioned air purification device includes the following steps:

[0020] Obtain image information of the filter component;

[0021] The cleanliness of the filter assembly is obtained based on the image information;

[0022] If the cleanliness of the filter assembly is less than the preset cleanliness level, the self-cleaning mode is activated to clean the filter assembly.

[0023] In one embodiment, the filter assembly includes multiple areas to be cleaned, and the air purification device has multiple first suction ports, each of which corresponds to one of the areas to be cleaned. The self-cleaning mode includes the following steps:

[0024] Drive the filter assembly to rotate;

[0025] Open the first vacuum port corresponding to the area currently to be cleaned;

[0026] When the number of rotations of the filter assembly is equal to the preset number of rotations, image information of the area to be cleaned is acquired, and the cleanliness of the current area to be cleaned is obtained based on the image information of the current area to be cleaned.

[0027] When the cleanliness of the current area to be cleaned is less than the preset cleanliness, return to the step of opening the first vacuum port corresponding to the current area to be cleaned, until the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness;

[0028] When the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness, the next area to be cleaned is taken as the current area to be cleaned again, and the process returns to the step of opening the first suction port corresponding to the current area to be cleaned, until the cleanliness of all areas to be cleaned is equal to or greater than the preset cleanliness, and then the self-cleaning mode is turned off.

[0029] The aforementioned air purification device automatically determines whether the filter assembly needs cleaning because the image of the filter assembly changes when it accumulates a large amount of impurities. When cleaning is required, the dust removal component can automatically clean the filter assembly by drawing in the dust through the suction port, thus extending its lifespan, ensuring adequate airflow, and improving the purification effect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an air purification device according to an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the structure of a filter assembly according to an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the structure of a dust removal component according to an embodiment of this application.

[0033] Figure 4 for Figure 3 The front view of the dust removal component shown.

[0034] Figure 5 for Figure 3 The diagram shows the internal structure of the dust removal component.

[0035] Figure 6 This is a schematic diagram of the internal air duct structure according to an embodiment of this application.

[0036] Figure 7 for Figure 6 A schematic diagram of the internal air duct from another angle.

[0037] Figure 8 for Figure 6 A schematic diagram of the internal air duct from another angle.

[0038] Figure 9 This is a schematic diagram of a self-cleaning method for an air purification device according to an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Air purification device; 120. Filter assembly; 121. Air inlet; 140. Filter drive assembly; 160. Dust removal assembly; 161. External air duct; 161a. First dust suction port; 162. Internal air duct; 162a. Dust suction channel; 162b. Second dust suction port; 163. Dust removal drive unit; 164. Dust collection unit; 165. Dust suction unit; 180. Image acquisition unit. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are 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 this application. However, this application can be implemented 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 this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" 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. Similarly, "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.

[0046] It should be noted that if 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. If 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. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] See Figure 1An embodiment of this application provides an air purification device 100, including a filter assembly 120, a dust removal assembly 160, and an image acquisition unit 180. The filter assembly 120 filters dust, lint, and other impurities from the air. The dust removal assembly 160 is spaced apart from the filter assembly 120 and has a first suction port 161a facing the filter assembly 120 for absorbing dust, lint, and other impurities from the filter assembly 120. The image acquisition unit 180 is located on one side of the filter assembly 120 and acquires image information of the filter assembly 120. A control component is communicatively connected to both the image acquisition unit 180 and the dust removal assembly 160, and acquires the cleanliness of the filter assembly 120 through the image information, and controls the operating state of the dust removal assembly 160 based on the cleanliness level.

[0048] Since the image on the outer surface of the filter assembly 120, which adsorbs a large amount of impurities, changes, the air purifier 100 can automatically determine whether the filter assembly 120 needs cleaning by acquiring the image information of the filter assembly 120. When the filter assembly 120 needs cleaning, the dust removal assembly 160 can adsorb the impurities on the filter through the first dust suction port 161a, thereby achieving automatic cleaning and purification of the filter assembly 120, extending the service life of the filter assembly 120, ensuring the air intake of the air purifier 100, and improving the purification effect of the air purifier 100.

[0049] Specifically, in combination Figure 2 As shown, the filter assembly 120 is generally a hollow cylindrical structure. When the air purifier 100 is placed on a supporting surface (such as the ground or a table), the central axis of the filter assembly 120 is perpendicular to the supporting surface. In the radial direction of the filter assembly 120, it includes a pre-filter, a room-temperature catalytic filter, and a high-efficiency purification filter stacked sequentially from the outside in. The lower part of the filter assembly 120 has multiple spaced air inlets 121, and the top of the filter assembly 120 has a rotatable fan. The negative pressure generated by the fan's rotation causes external air to flow into the filter assembly 120 through the air inlets 121. The filter assembly 120 can block dust, lint, and other impurities carried in the airflow. The purified airflow flows out of the filter assembly 120 and back into the external atmosphere, thereby achieving air purification.

[0050] Please continue reading. Figure 1In some embodiments, the air purification device 100 further includes a filter drive assembly 140, which is disposed at the bottom of the filter assembly 120 and is tractively connected to the filter assembly 120. The filter drive assembly 140 drives the filter assembly 120 to rotate about its own central axis, thereby causing the outer sidewall of the filter assembly 120 to approach the first suction port 161a of the dust removal assembly 160 in different circumferential areas. Specifically, in one embodiment, the filter drive assembly 140 includes a drive motor and a transmission mechanism, with the drive motor driving the filter assembly 120 to rotate via the transmission mechanism.

[0051] Please combine Figure 1 , Figure 3 , Figure 4 as well as Figure 5 As shown, the dust removal assembly 160 includes an external air duct 161, an internal air duct 162, a dust removal drive unit 163, a dust collection unit 164, and a dust suction unit 165.

[0052] The external air duct 161 has a hollow cylindrical structure. The central axis of the external air duct 161 is parallel to and spaced apart from the central axis of the filter assembly 120. Multiple first dust suction ports 161a are opened on the side wall of the external air duct 161 facing the filter assembly 120. All the first dust suction ports 161a are arranged at intervals along the direction of the central axis of the external air duct 161, and all the first dust suction ports 161a are aligned in the circumferential direction of the external air duct 161.

[0053] Thus, the filter assembly 120 forms multiple sequentially arranged cleaning areas along the axial direction from the upper right to the lower right. Each first suction port 161a corresponds to one cleaning area of ​​the filter assembly 120. Therefore, one cleaning area of ​​the filter assembly 120 can be cleaned at a time through one first suction port 161a, instead of using one second suction port 162b to clean the entire filter assembly 120.

[0054] It is understood that the number of first suction ports 161a on the external air duct 161 is not limited to this. The number of first suction ports 161a is matched with the number of areas to be cleaned, and can be set as needed to meet different cleaning requirements.

[0055] The inner air duct 162 has a hollow cylindrical structure. It is housed within the outer air duct 161 and coaxially arranged with it. A dust suction channel 162a extends along the central axis of the inner air duct 162. The dust suction channel 162a is selectively connected to one of the first dust suction ports 161a. A negative pressure can be generated within the dust suction channel 162a, allowing dust from the filter assembly 120 to enter through the first dust suction port 161a. Because the dust suction channel 162a selectively connects to one of the first dust suction ports 161a, rather than multiple ports simultaneously, the negative pressure at the first dust suction port 161a can be increased, resulting in better dust suction performance.

[0056] Furthermore, the inner air duct 162 has multiple second suction ports 162b that connect to the suction channel 162a. All the second suction ports 162b are spaced apart in the axial direction of the inner air duct 162, and also spaced apart in the circumferential direction. The inner air duct 162 can be controlled to rotate around its central axis, so that one of the second suction ports 162b connects to a first suction port 161a, while the remaining second suction ports 162b correspond to the wall of the outer air duct 161, thereby keeping the remaining first suction ports 161a closed.

[0057] Thus, by controlling the inner air duct 162 to be at different rotation angles, only one first dust suction port 161a on the outer air duct 161 can be connected to the dust suction channel 162a, thereby cleaning one of the areas to be cleaned on the filter assembly 120.

[0058] Please refer to the figure. Figures 6 to 8 In a preferred embodiment, the outer air duct 161 has four first dust suction ports 161a on its wall, arranged sequentially at intervals along the axial direction of the outer air duct 161. The inner air duct 162 has four second dust suction ports 162b on its wall, arranged sequentially at intervals along the axial direction of the inner air duct 162. In the circumferential direction of the inner air duct 162, all second dust suction ports 162b are spaced apart, with adjacent second dust suction ports 162b at 90° intervals. Each first dust suction port 161a corresponds to one second dust suction port 162b in the radial direction of the outer air duct 161. Thus, rotating the inner air duct 162 by 90° allows the opening and closing of the first dust suction ports 161a to be switched.

[0059] Please refer to the previous document. Figure 1The dust removal drive unit 163 is connected to one axial end of the inner air duct 162 for driving the inner air duct 162 to rotate around its own central axis. In a specific embodiment, the dust removal drive unit 163 includes a drive motor, which can output torque to drive the inner air duct 162 to rotate relative to the outer air duct 161.

[0060] The dust collection unit 164 is connected between the end of the suction channel 162a away from the dust removal drive unit 163 and the suction unit 165. The suction unit 165 is used to generate negative pressure in the suction channel 162a, so that impurities on the filter assembly 120 can enter the suction channel 162a through the first suction port 161a and the second suction port 162b, and are finally collected by the dust collection unit 164. The user only needs to clean the dust collection unit 164.

[0061] In some embodiments, the air purification device 100 includes a plurality of image acquisition units 180, all of which are sequentially mounted on the wall of the external air duct 161 of the dust removal assembly 160 along the rotation axis of the filter assembly 120. Each image acquisition unit 180 is used to acquire image information of a portion of the filter assembly 120. Specifically, the image acquisition unit 180 includes a camera.

[0062] In a preferred embodiment, the image acquisition unit 180 includes three image acquisition units 180 arranged at intervals to acquire image information of different areas on the filter assembly 120. It is understood that the number of image acquisition units 180 is not limited to this and can be set as needed.

[0063] like Figure 1 and Figure 9 As shown, this application also provides a self-cleaning method for an air purification device 100, comprising the following steps:

[0064] S110: Obtain image information from filter assembly 120.

[0065] Specifically, the control component controls the image acquisition unit 180 to acquire image information of the outer wall of the filter assembly 120. The image acquisition unit 180 can acquire image information of the filter assembly 120 in real time under the control of the control component, or it can acquire image information of the filter assembly 120 at preset time intervals.

[0066] S120: Obtain the cleanliness of the filter assembly 120 based on image information.

[0067] Specifically, the image acquisition unit 180 can send image information to the control component. Since impurities adsorbed on the filter assembly 120 will reduce the clarity of the filter mesh compared to the surface pattern of the component, the control component can obtain the cleanliness of the filter mesh assembly 120 based on the clarity of the filter mesh compared to the surface pattern of the component. The lower the clarity, the lower the cleanliness.

[0068] S130: If the cleanliness of the filter assembly 120 is less than the preset cleanliness, activate the self-cleaning mode to clean the filter assembly 120.

[0069] Specifically, when the control component determines that the cleanliness of the filter assembly 120 is less than the preset cleanliness, it indicates that there are too many impurities accumulated on the filter assembly 120, so the self-cleaning mode is activated to automatically clean the filter assembly 120.

[0070] Since the above method automatically determines the cleanliness of the filter assembly 120 and automatically starts the self-cleaning mode through the image acquisition unit 180 and the control component, the filter assembly 120 can be automatically cleaned and purified, thereby extending the service life of the filter assembly 120, ensuring the air intake of the air purifier 100, and improving the purification effect of the air purifier 100.

[0071] In some embodiments, the self-cleaning mode includes the following steps:

[0072] S121: Drive the filter assembly 120 to rotate.

[0073] Specifically, the control component controls the filter drive component 140 to drive the filter component 120 to rotate.

[0074] S122: Open the first suction port 161a corresponding to the area to be cleaned.

[0075] Specifically, the control component controls the dust removal drive unit 163 to drive the inner air duct 162 to rotate, so that one of the second dust suction ports 162b on the inner air duct 162 is connected to one of the first dust suction ports 161a on the outer air duct 161. At the same time, the control unit 165 generates negative pressure, and the impurities on the current area to be cleaned on the filter assembly 120 enter the dust suction channel 162a through the first dust suction port 161a and the second dust suction port 162b in sequence, and are finally collected in the dust collection unit 164.

[0076] S123: When the number of rotations of the filter assembly 120 is equal to the preset number of rotations, image information of the area to be cleaned is obtained, and the cleanliness of the current area to be cleaned is obtained based on the image information of the current area to be cleaned.

[0077] Specifically, when the control component determines that the number of rotations of the filter assembly 120 equals a preset number of rotations, the image acquisition unit 180 acquires image information of the area to be cleaned. The image acquisition unit 180 can send the image information of the area to be cleaned to the control component, and the control component can determine the cleanliness of the filter assembly 120 based on the clarity of the pattern on the outer wall of the filter assembly 120. In one specific embodiment, the preset number of rotations is two weeks. It is understood that the specific value of the preset number of rotations is not limited and can be set as needed.

[0078] S124: When the cleanliness of the current area to be cleaned is less than the preset cleanliness, return to the step of opening the first suction port 161a corresponding to the current area to be cleaned, until the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness.

[0079] Specifically, when the control component determines that the cleanliness of the area to be cleaned is less than the preset cleanliness, it returns to step S122 and repeats the cleaning of the current area until the control component determines that the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness.

[0080] S126: When the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness, the next area to be cleaned is set as the current area to be cleaned again, and the process returns to the step of opening the first suction port 161a corresponding to the current area to be cleaned, until the cleanliness of all areas to be cleaned is equal to or greater than the preset cleanliness, and the self-cleaning mode is turned off.

[0081] Specifically, when the control component determines that the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness, the control component controls the dust removal drive unit 163 to drive the inner air duct 162 to rotate a certain angle, causing the currently interconnected second suction port 162b to be misaligned with the first suction port 161a. The current first suction port 161a is closed, and at the same time, the other first suction port 161a is aligned and connected with the other second suction port 162b. Therefore, the other first suction port 161a is connected to the suction channel 162a through the other second suction port 162b, thereby cleaning the other area to be cleaned. The above steps are repeated until the cleanliness of all areas to be cleaned is equal to or greater than the preset cleanliness, at which point the self-cleaning mode is turned off, and the filter drive component 140 is controlled to stop driving the filter component 120 to rotate.

[0082] The air purifier 100 and its self-cleaning method described above can automatically determine whether the filter assembly 120 needs to be cleaned through the image acquisition unit 180 and the control component, and control the dust removal component 160 to automatically clean the filter assembly, thereby reducing the deposition of impurities on the filter assembly 120, extending the life of the filter assembly 120, and improving the purification effect of the air purifier 100.

[0083] 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.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An air purification device, characterized in that, include: The filter assembly (120) rotates about its own central axis, and the filter assembly (120) forms a plurality of sequentially arranged areas to be cleaned along the axial direction; A dust removal assembly (160) is spaced apart from the filter assembly (120). The dust removal assembly (160) includes an external air duct (161) and an internal air duct (162). The central axis of the external air duct (161) is parallel to the rotation axis of the filter assembly (120). The wall of the external air duct (161) has a plurality of first dust suction ports (161a) facing the filter assembly (120). All the first dust suction ports (161a) are arranged at intervals along the rotation axis of the filter assembly (120). Each first dust suction port (161a) corresponds to... The filter assembly (120) has a cleaning area, the inner air duct (162) is housed within the outer air duct (161) and coaxially arranged with the outer air duct (161), the inner air duct (162) forms a dust suction channel (162a) and has multiple second dust suction ports (162b) communicating with the dust suction channel (162a), all the second dust suction ports (162b) are spaced apart in the axial direction of the inner air duct (162), and all the second dust suction ports (162b) are spaced apart in the circumferential direction of the inner air duct (162); and Multiple image acquisition units (180) are disposed on one side of the filter assembly (120). All the image acquisition units (180) are sequentially installed on the dust removal assembly (160) along the rotation axis of the filter assembly (120). The image acquisition units (180) are used to acquire image information of different areas on the filter assembly (120). The control component is communicatively connected to the image acquisition unit (180) and the dust removal component (160), respectively, and is used to acquire the cleanliness of the filter component (120) through the image information, and control the working state of the dust removal component (160) according to the cleanliness. The inner air duct (162) can be controlled to rotate around its own central axis so that one of the second dust suction ports (162b) is connected to one of the first dust suction ports (161a), and the remaining second dust suction ports (162b) correspond to the pipe wall of the outer air duct (161).

2. The air purification device according to claim 1, characterized in that, The air purification device further includes a filter drive assembly (140), which is connected to the filter assembly (120) and is used to drive the filter assembly (120) to rotate.

3. The air purification device according to claim 1, characterized in that, The dust removal assembly (160) further includes a dust removal drive unit (163), which is connected to the inner air duct (162) for driving the inner air duct (162) to rotate around its own central axis.

4. The air purification device according to claim 1, characterized in that, The dust removal assembly (160) further includes a dust collection unit (164) and a dust suction unit (165), wherein the dust collection unit (164) is connected between the dust suction channel (162a) and the dust suction unit (165).

5. A self-cleaning method for an air purification device as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Obtain image information of the filter assembly (120); The cleanliness of the filter assembly (120) is obtained based on the image information; If the cleanliness of the filter assembly (120) is less than the preset cleanliness, the self-cleaning mode is activated to clean the filter assembly (120).

6. The self-cleaning method according to claim 5, characterized in that, The filter assembly (120) includes multiple areas to be cleaned, and the air purification device has multiple first suction ports (161a), each of which corresponds to one of the areas to be cleaned. The self-cleaning mode includes the following steps: Drive the filter assembly (120) to rotate; Open the first suction port (161a) corresponding to the area to be cleaned. When the number of rotations of the filter assembly (120) is equal to the preset number of rotations, image information of the area to be cleaned is acquired, and the cleanliness of the current area to be cleaned is obtained based on the image information of the current area to be cleaned. When the cleanliness of the current area to be cleaned is less than the preset cleanliness, return to the step of opening the first suction port (161a) corresponding to the current area to be cleaned, until the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness; When the cleanliness of the current area to be cleaned is equal to or greater than the preset cleanliness, the next area to be cleaned is taken as the current area to be cleaned again, and the process returns to the step of opening the first suction port (161a) corresponding to the current area to be cleaned, until the cleanliness of all areas to be cleaned is equal to or greater than the preset cleanliness, and then the self-cleaning mode is turned off.

Images