Air purification equipment and its control methods

Abstract

This invention relates to the field of air purification technology, and discloses an air purification device and its control method. The control method includes: activating a filter cleaning mode and controlling the filter to rotate; acquiring image information of the filter surface and initially identifying the dirty areas of the filter based on the image information; controlling an infrared detection device to perform a secondary detection of the degree of dirtiness in the dirty areas, and determining whether the degree of dirtiness is greater than or equal to a set dirtiness threshold; if so, controlling the dirty area to rotate to a preset dust collection position and controlling the dust collection device to start dust removal in the dirty area; if not, controlling the filter to continue rotating to identify and detect the next area. This invention uses a combination of image recognition and infrared detection to accurately and efficiently identify the dirty areas and degree of dirtiness of the filter, greatly improving detection efficiency and accuracy, and solving the problems of low identification efficiency, long detection cycle, and easy misjudgment in existing air purification devices with intelligent filter cleaning functions.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, specifically to air purification equipment and its control method. Background Technology

[0002] As living standards improve, air purifiers are increasingly used in homes, and people's demands for the intelligence of these devices are also rising. After a period of use, dust accumulates on the filter surface of air purifiers, increasing air resistance. This not only reduces purification efficiency but also increases motor power and energy consumption. Therefore, timely cleaning of the filter surface is crucial. However, existing air purifiers with intelligent filter cleaning functions suffer from low detection efficiency, long processing times, and a tendency to misdiagnose, failing to meet user needs. Summary of the Invention

[0003] In view of this, the present invention provides an air purification device to solve the problems of low detection efficiency, long detection time, and easy misjudgment in existing air purification devices with intelligent filter cleaning function.

[0004] In a first aspect, the present invention provides a control method for an air purification device. The control method includes: activating a filter cleaning mode and controlling the filter to rotate; acquiring image information of the filter surface and initially identifying the dirty areas of the filter based on the image information; controlling an infrared detection device to perform secondary detection on the degree of dirtiness of the dirty areas and determining whether the degree of dirtiness is greater than or equal to a set dirtiness threshold; if so, controlling the dirty area to rotate to a preset dust collection position and controlling the dust collection device to start dust removal on the dirty area; if not, controlling the filter to continue rotating to identify and detect the next area.

[0005] Beneficial effects: First, by collecting image information of the filter surface, the accumulation of dust and foreign objects on the filter surface is initially judged, and the dirty areas of the filter are initially identified. Then, combined with an infrared detection device, the degree of dirtiness in the dirty area is further judged. Then, the more seriously dirty areas are moved to the corresponding vacuuming position of the vacuuming device. The vacuuming device adsorbs and cleans the dust and foreign objects on the filter surface in that area, realizing intelligent cleaning of the filter, ensuring the cleanliness of the filter, and solving the problem that ordinary air purifiers easily accumulate dust on the filter surface and cannot automatically clean dust and foreign objects on the filter surface.

[0006] Furthermore, by combining image recognition and infrared detection, the system accurately and efficiently identifies the dirty areas and degree of dirt on the filter. This high-precision and fast identification significantly improves the detection efficiency and accuracy of filter cleaning, ensuring energy efficiency and timely cleaning for the entire unit. It avoids the detection errors and misjudgments that occur with image recognition alone, leading to energy waste, and also avoids the problems of long detection cycles, low efficiency, long processing times, and delayed cleaning associated with infrared detection alone. Therefore, this technology effectively solves the problems of low recognition efficiency, long detection cycles, susceptibility to misjudgments, and difficulty in balancing energy efficiency and timely filter cleaning in existing air purifiers with intelligent filter cleaning functions, thus failing to meet user needs.

[0007] In one optional implementation, the steps of acquiring filter surface image information and initially identifying dirty areas of the filter based on the image information, and controlling the infrared detection device to perform secondary detection of the degree of dirtiness in the dirty areas and determine whether the degree of dirtiness is greater than or equal to a set dirtiness threshold, specifically include the following steps: controlling the image recognition device to acquire filter surface information, and controlling the filter to stop rotating when a dirty area is identified; controlling the infrared detection device to rotate to a position corresponding to the dirty area to perform secondary detection and judgment of the degree of dirtiness in the dirty area; when it is determined that the degree of dirtiness in the dirty area is greater than or equal to the set dirtiness threshold, controlling the infrared detection device to rotate synchronously with the filter, while the image recognition device determines whether the dirty area has moved to the dust collection position by tracking the position of the infrared detection device.

[0008] Beneficial effects: The infrared detection device can rotate independently or synchronously with the filter. Using an image recognition device, it initially locates the dirty areas on the filter surface, stops the filter's rotation, and then rotates the infrared detection device to that dirty area for further identification and detection of the degree of dirtiness. If a heavily soiled area is detected, the infrared detection device is then controlled to rotate in the same angular velocity and direction as the filter until the image recognition device identifies that the infrared detection device has moved to the dust collection device. This indicates that the heavily soiled area of ​​the filter has been moved to the dust collection device, which then cleans the filter surface, achieving self-cleaning of the rotating filter in the air purification equipment. Since the filter is cylindrical and the image recognition device is located on one side of the filter, during the rotation of the filter, the dirty area may rotate to the side opposite to the image recognition device and be blocked. The image recognition device will then be unable to continue tracking and locating the position of the dirty area. Therefore, this embodiment controls the infrared detection device and the filter to rotate synchronously, and determines whether the filter has rotated to the dust collection position by tracking the position of the infrared detection device. This effectively avoids the above-mentioned problem, so that the infrared detection device not only has the function of detecting the degree of dirt on the filter, but also plays an auxiliary positioning role.

[0009] In one optional implementation, after the image recognition device determines whether the dirty area has moved to the vacuuming position by tracking the position of the infrared detection device, the following steps are further included: when it is determined that the dirty area has moved to the vacuuming position, the filter is controlled to stop rotating, and at the same time the infrared detection device is controlled to rotate to a position away from the vacuuming position.

[0010] Beneficial effect: When the filter screen is detected to be in the dust collection position, it stops rotating to facilitate the dust collection device to handle the dust, while the infrared detection device continues to rotate away from the dust collection position to avoid affecting the dust collection device's dust collection operation.

[0011] In one optional embodiment, the filter is cylindrical, and the infrared detection device includes an infrared generator and an infrared receiver correspondingly disposed on the inner and outer sides of the filter. Controlling the infrared detection device to perform secondary detection of the degree of dirtiness in the dirty area specifically includes the following steps: controlling the infrared generator to emit infrared light towards the dirty area; obtaining the amount of infrared light received by the infrared receiver, calculating the light transmittance of the dirty area, and judging the degree of dirtiness of the dirty area based on the light transmittance.

[0012] Beneficial effects: The amount of light transmitted through a dirty area is calculated by receiving the amount of infrared light emitted by the infrared generator through an infrared receiver. The degree of dirtiness in the dirty area is then determined based on the amount of light transmitted, resulting in a more accurate calculation.

[0013] In one optional implementation, the filter cleaning mode is initiated by receiving a signal that the filter has reached a preset cleaning cycle. Upon reaching the preset cleaning cycle, the filter cleaning mode is automatically initiated, resulting in a higher level of intelligence.

[0014] In one alternative implementation, the control method further includes automatically adjusting the cleaning cycle size based on changes in the light transmittance of the filter.

[0015] Beneficial effects: If the amount of light transmitted decreases quickly, it indicates poor environmental quality. Therefore, the cleaning cycle can be shortened to avoid affecting the purification effect of the air purifier due to untimely filter cleaning. If the amount of light transmitted decreases slowly, it indicates good environmental quality. Therefore, the cleaning cycle can be extended to avoid energy waste caused by frequent cleaning. This allows for intelligent adjustment of the cleaning cycle, ensuring energy saving and timely cleaning of the entire machine.

[0016] In one optional implementation, the cleaning cycle is automatically adjusted based on changes in filter transmittance. Specifically, this includes: setting the filter transmittance of a brand-new air purifier to X0 = 100%, and the default cleaning cycle to Y0; when time Y0 is reached for the first time after use, the filter transmittance X1 is obtained, and the filter is cleaned for the first time, with the timer reset after cleaning; when time Y0 is reached again, the filter transmittance X2 is obtained, and the filter is cleaned for the second time; the rate of change in filter transmittance Z1 = (X1 - X2) / (X0 - X1) is calculated, and the third cleaning cycle is Y1 = Y0 / Z1; this process is repeated for each subsequent cleaning cycle according to formula Z1. n =(X n -X n+1 ) / (X n-1 -X n Calculate the rate of change Z of the filter transmittance. n And according to formula Y n =Y n-1 / Z n Calculate and update the next cleaning cycle Y n Among them, Z n Y represents the rate of change in filter transmittance calculated before this cleaning. n This is for the next cleaning cycle.

[0017] Beneficial effects: By adopting the above method, intelligent logic for timing the whole machine's cleaning cycle is realized, ensuring energy saving and timely cleaning of the whole machine. It can effectively avoid the problem of energy waste caused by over-cleaning when the indoor environmental quality is good, and the problem of untimely cleaning when the indoor environmental quality is poor, which makes the incompletely purified air threaten human health.

[0018] In one alternative implementation, after dust removal of the dirty area, the following steps are performed: the filter screen is controlled to continue rotating until it is determined that the degree of dirt in all areas of the entire circumference of the filter screen is less than the set dirt threshold, at which point the rotation stops and the filter screen cleaning mode ends.

[0019] In a second aspect, the present invention also provides a computer-readable storage medium storing computer instructions for causing a computer to perform the control method of any of the above embodiments.

[0020] Thirdly, the present invention also provides an air purification device, wherein the air purification device uses the control method of any of the above embodiments to clean its filter.

[0021] In one optional embodiment, the air purification device includes a housing, a filter, a dust collection device, and an image recognition device. The housing has an air inlet and an air outlet. The filter includes a filter screen rotatably disposed within the housing and a drive mechanism for driving the filter screen to rotate. The filter screen is adapted to filter the air entering the housing through the air inlet. The dust collection device is fixedly disposed within the housing for adsorbing dust on the filter screen. The image recognition device is disposed within the housing for acquiring image information of the filter screen surface and initially identifying the dirty areas of the filter screen. The infrared detection device is used for secondary detection and judgment of the degree of dirtiness in the dirty areas.

[0022] In one optional embodiment, the filtering device further includes a base, which includes a support portion and a rotating portion. The rotating portion is rotatably disposed within the support portion. The rotating portion includes a first region, a second region, and a third region arranged sequentially from the center of the base outwards. The first region, the second region, and the third region are adapted to rotate independently or synchronously. The first region is disc-shaped, and the second and third regions are annular. The filter screen is installed in the second region, and one of the infrared generator and the infrared receiver of the infrared detection device is installed in the first region, and the other is installed in the third region.

[0023] Beneficial effects: By installing the filter in the second area, and the infrared generator and infrared receiver installed in the first and second areas respectively, the infrared generator and infrared receiver can be distributed on the inner and outer sides of the filter. At the same time, the first, second and second areas can all rotate around the central axis of the base, thereby driving the filter, infrared generator and infrared receiver to rotate.

[0024] In one optional embodiment, the infrared generator and the infrared receiver are respectively fixed at a first preset height position above the base by a column support, the height of the filter is set to H, the first preset height is H1, and 1 / 2H < H1 < H.

[0025] Beneficial effects: Since the recognition area of ​​the image recognition device is limited, the dirty area may be out of the field of view of the image recognition device when it moves to the vicinity of the vacuum cleaner. However, the infrared generator and infrared receiver are supported by the column at the first preset height position above the base, which makes it convenient for the image recognition device to track and identify the location of the dirty area through the infrared generator, infrared receiver or column.

[0026] In one alternative embodiment, the vacuuming device is fixed on the support portion of the base and located on one side of the filter screen, with the vacuuming port of the vacuuming device facing the outer periphery of the filter screen and at a predetermined interval from the filter screen.

[0027] Beneficial effects: By placing the vacuum cleaner on one side of the filter with a set interval between them, the vacuum cleaner's adsorption effect on the filter can be ensured, while avoiding interference with the filter's rotation.

[0028] In one optional embodiment, a bracket is fixedly provided on the support portion of the base. The bracket is located outside the filter and is spaced at a predetermined interval from the filter. The image recognition device includes an image acquisition unit, which is fixedly installed on the bracket at a second predetermined height position.

[0029] Beneficial effect: By supporting the image recognition device at a second preset height position with a bracket, the field of view of the image recognition device can be increased, making it easier for it to track the location of the dirty area to be cleaned through the infrared detection device. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the air purification device in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the internal structure of the air purification device after removing the housing in an embodiment of the present invention;

[0033] Figure 3 for Figure 2 Top view after removing the filter;

[0034] Figure 4 This is a flowchart illustrating a first embodiment of the control method for an air purification device according to an example of the present invention.

[0035] Figure 5 This is a flowchart illustrating a second embodiment of the control method for an air purification device according to an embodiment of the present invention.

[0036] Figure 6 This is a flowchart illustrating a third embodiment of the control method for an air purification device according to an embodiment of the present invention.

[0037] Figure 7 This is a flowchart illustrating the fourth embodiment of the control method for an air purification device according to an embodiment of the present invention;

[0038] Figure 8 This is a flowchart illustrating a fifth embodiment of the control method for an air purification device according to an embodiment of the present invention.

[0039] Figure 9This is a flowchart illustrating a sixth embodiment of the control method for an air purification device according to an embodiment of the present invention.

[0040] Figure 10 This is a flowchart illustrating the seventh embodiment of the control method for an air purification device according to an example of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 10. Housing; 101. Air inlet; 102. Air outlet; 103. Control panel;

[0043] 20. Filter device; 21. Filter screen; 22. Base; 221. Support part; 222. Rotating part; 2221. First area; 2222. Second area; 2223. Third area; 23. Bracket;

[0044] 30. Vacuum cleaning device;

[0045] 40. Image recognition device;

[0046] 50. Infrared detection device; 51. Infrared generator; 52. Infrared receiver; 53. Column. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the 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] With the improvement of living standards, air purification equipment is increasingly used in households, and people's requirements for the intelligence of these devices are also gradually increasing. After a period of use, dust accumulates on the surface of the filter 21 in air purifiers, leading to increased air resistance. This not only reduces purification efficiency but also increases motor power and energy consumption. Therefore, timely cleaning of dust and debris from the filter 21 is crucial. However, existing air purifiers with intelligent filter cleaning functions suffer from low detection efficiency, are prone to misjudgments, and struggle to balance energy saving and timely cleaning, failing to meet user needs.

[0052] Specifically, some air purification devices using related technologies typically employ a separate image recognition device 40 to photograph and analyze the dirt condition of the filter 21. However, due to uncertain interference factors such as light, air quality, and obstructions within the housing 10 of the air purification device, the accuracy of identifying the dirt condition of the filter 21 through photography is somewhat inaccurate. For example, if the lighting in the housing 10 is dim or the air is turbid, the image recognition device 40 may identify a large amount of dust and impurities on the filter 21, even if the actual surface of the filter 21 has little or no dust and does not meet the cleanliness standard. In such cases, directly cleaning the filter 21 would result in a waste of resources.

[0053] In addition, some other air purification devices in related technologies use infrared detection devices 50 to identify the degree of dirt on the filter 21. Although this can avoid the problems of error and low accuracy of image recognition device 40 to a certain extent, identification by infrared detection device 50 requires identification and detection of the entire circumference of filter 21 one by one, and filter 21 needs to be paused to facilitate detection by infrared detection device 50. This has problems such as long detection time, cumbersome steps, low efficiency, and untimely cleaning.

[0054] Therefore, this embodiment provides a control method for an air purification device that has high detection efficiency, small error, and can balance energy saving and timely cleaning of the whole machine.

[0055] The following combination Figures 1 to 10 The following describes embodiments of the present invention.

[0056] According to embodiments of the present invention, in one aspect, the present invention provides a control method for an air purification device, combined with Figures 1 to 4 As shown, the control method includes the following steps:

[0057] Step S101: Start the filter cleaning mode and control the filter 21 to rotate;

[0058] Step S102: Collect image information of the surface of filter 21, and preliminarily identify the dirty areas of filter 21 based on the image information;

[0059] Step S103: Control the infrared detection device 50 to perform a second detection on the degree of dirt in the dirty area, and determine whether the degree of dirt is greater than or equal to the set dirt threshold: if yes, then proceed to step S104; if no, then proceed to step S105.

[0060] Step S104: Control the dirty area to rotate to the preset vacuuming position, and control the vacuuming device 30 to start to remove dust from the dirty area;

[0061] Step S105: Control the filter 21 to continue rotating to identify and detect the next area.

[0062] In the above embodiment, the accumulation of dust and foreign objects on the surface of the filter 21 is initially determined by collecting image information of the filter 21 surface, and the dirty areas of the filter 21 are initially identified. Then, the degree of dirtiness of the dirty area is further determined by the infrared detection device 50. Then, the area with more serious dirtiness is transferred to the vacuuming position corresponding to the vacuuming device 30. The vacuuming device 30 adsorbs and cleans the dust and foreign objects on the surface of the filter 21 in that area, realizing intelligent cleaning of the filter 21, ensuring the cleanliness of the filter 21, and solving the problem that dust easily accumulates on the surface of the filter 21 of ordinary air purification equipment and cannot be automatically cleaned.

[0063] Furthermore, this embodiment uses a combination of image recognition and infrared detection to accurately and efficiently identify the dirty areas and degree of dirt on the filter 21. The high accuracy and speed of identification significantly improve the detection efficiency and precision of filter 21 cleaning, ensuring energy saving and timely cleaning of the entire unit. This avoids the detection errors and misjudgments that occur when solely relying on image recognition to identify dirty areas of the filter 21, leading to energy waste. It also avoids the problems of long detection cycles, low efficiency, long processing times, and untimely cleaning associated with solely relying on infrared detection. Therefore, this effectively solves the problems of existing air purifiers with intelligent filter 21 cleaning functions, which suffer from low recognition efficiency, long detection cycles, susceptibility to misjudgments, difficulty in balancing energy saving and timely filter cleaning, and inability to meet user needs.

[0064] Furthermore, in step S101 above, the entire circumferential cleaning of the filter 21 is detected and cleaned by controlling its rotation, which is more convenient. In step S102 above, the image recognition device 40 located on one side of the filter 21 can first collect image information of the surface of the filter 21 to initially obtain the dirty areas of the filter 21. Then, the infrared detection device 50 can be paused to further identify and detect the dirty areas, without having to identify and detect the entire area of ​​the filter 21. This makes the detection of the infrared detection device 50 more targeted and greatly improves the detection efficiency. In addition, since image recognition cannot detect fine dust and foreign objects or the specific blockage of the filter 21, after the image recognition device 40 initially identifies the dirty areas, the infrared detection device 50 further identifies and detects the dirty areas. The combination of image and infrared recognition can make up for the defects of large errors and low accuracy of detection by image recognition alone.

[0065] Furthermore, since users typically place air purifiers against a wall rather than in the center of the room, the wall side usually doesn't accumulate much dust. Therefore, the degree of dirtiness on the entire circumference of the filter 21 may be inconsistent. There might be a large amount of dust accumulation in one area of ​​the filter 21, while other areas might have very little dust accumulation. Cleaning the entire filter 21 indiscriminately would result in wasted power. Therefore, this embodiment uses a combination of image recognition and infrared detection to accurately locate the dirty areas that need cleaning. Then, the dirty areas are rotated to the suction position for dust removal and cleaning. This is more targeted, has a better cleaning effect, and can effectively avoid the problem of wasted resources.

[0066] In some embodiments, in conjunction with figures 1 to 1 Figure 3 as well as Figure 5As shown, the process involves acquiring image information of the filter surface and initially identifying dirty areas of the filter based on this image information; controlling an infrared detection device to perform a secondary detection of the degree of dirtiness in the dirty areas and determining whether the degree of dirtiness is greater than or equal to a set dirtiness threshold. This specifically includes the following steps:

[0067] Step S201: Control the image recognition device 40 to collect surface information of the filter screen 21, and control the filter screen 21 to stop rotating when a dirty area is detected;

[0068] Step S202: Control the infrared detection device 50 to rotate to the position corresponding to the dirty area, so as to perform a secondary detection and judgment on the degree of dirtiness of the dirty area;

[0069] Step S203: When it is determined that the degree of dirtiness of the dirty area is greater than or equal to the set dirtiness threshold, the infrared detection device 50 is controlled to rotate synchronously with the filter 21. At the same time, the image recognition device 40 determines whether the dirty area has moved to the vacuuming position by tracking the position of the infrared detection device 50.

[0070] In the above embodiment, the infrared detection device 50 can rotate independently or synchronously with the filter 21. The image recognition device 40 initially locates the dirty area on the surface of the filter 21, controls the filter 21 to stop rotating, and then rotates the infrared detection device 50 to the dirty area to further identify and detect the degree of dirtiness. If the dirty area is found to be severely dirty, the infrared detection device 50 is then controlled to rotate in the same angular velocity and direction as the filter 21 until the image recognition device 40 recognizes that the infrared detection device 50 has rotated to the dust collection device 30. This indicates that the severely dirty area of ​​the filter 21 has been moved to the dust collection device 30, and the dust collection device 30 is used to remove dust from the surface of the filter 21, realizing the self-cleaning of the rotating filter 21 of the air purification equipment. Since the filter 21 is cylindrical and the image recognition device 40 is located on one side of the filter 21, during the rotation of the filter 21, the dirty area may rotate to the side opposite to the image recognition device 40 and be blocked. The image recognition device 40 will then be unable to continue tracking and locating the position of the dirty area. Therefore, this embodiment controls the infrared detection device 50 and the filter 21 to rotate synchronously, and determines whether the filter 21 has rotated to the dust collection position by tracking the position of the infrared detection device 50. This effectively avoids the above-mentioned problem, so that the infrared detection device 50 not only has the function of detecting the degree of dirt on the filter 21, but also plays an auxiliary positioning role.

[0071] In some embodiments, in conjunction with figures 1 to 1 Figure 3 as well as Figure 6 As shown, after the image recognition device determines whether the dirty area has moved to the vacuuming position by tracking the position of the infrared detection device, it also includes the following steps:

[0072] Step S301: When it is determined that the dirty area has been moved to the vacuuming position, control the filter 21 to stop rotating;

[0073] Step S302: Simultaneously control the infrared detection device 50 to rotate to a position away from the vacuuming position.

[0074] In the above embodiment, when it is determined that the dirty area has been moved to the vacuuming position, the filter 21 stops rotating to facilitate the vacuuming device 30 to vacuum it, while the infrared detection device 50 continues to rotate away from the vacuuming position to avoid affecting the vacuuming operation of the vacuuming device 30.

[0075] In some embodiments, in conjunction with figures 1 to 1 Figure 3 as well as Figure 7 As shown, the filter 21 is cylindrical, and the infrared detection device 50 includes an infrared generator 51 and an infrared receiver 52 correspondingly disposed on the inner and outer sides of the filter 21. The control of the infrared detection device 50 to perform secondary detection of the degree of dirtiness in the dirty area specifically includes the following steps:

[0076] Step S401: Control the infrared generator 51 to emit infrared light towards the dirty area;

[0077] Step S402: Obtain the amount of infrared light received by the infrared receiver 52, calculate the light transmittance of the dirty area, and determine the degree of dirtiness of the dirty area based on the light transmittance.

[0078] In the above embodiment, the amount of light transmitted through the dirty area is calculated by the amount of infrared light emitted by the infrared generator 51 and received by the infrared receiver 52. Then, the degree of dirtiness of the dirty area is judged based on the amount of light transmitted, and the calculation result is more accurate.

[0079] In some more specific embodiments, if the light transmittance is greater than or equal to a set threshold, it can be inferred that the degree of dirtiness of the dirty area is greater than or equal to the set dirtiness threshold; if the light transmittance is less than the set threshold, it can be inferred that the degree of dirtiness of the dirty area is less than the set dirtiness threshold.

[0080] For example, the set threshold is 70%. If the infrared receiver 52 can receive more than 70% of the infrared rays emitted by the infrared generator 51, it means that the amount of dust covering this area of ​​the filter 21 is acceptable and does not need to be cleaned for the time being. If the infrared receiver 52 receives less than 70% of the infrared rays emitted by the infrared generator 51, it means that the dust and foreign objects in this area of ​​the filter 21 have accumulated to a certain extent, affecting the air intake resistance and increasing the power consumption of the motor, and cleaning is required.

[0081] In some embodiments, in conjunction with figures 1 to 1 Figure 3 as well as Figure 8 As shown, the steps before activating the filter cleaning mode include:

[0082] Step S100: Receive a signal that the filter 21 has reached the preset cleaning cycle.

[0083] In the above embodiments, the filter cleaning mode is automatically activated upon reaching the preset cleaning cycle, resulting in a higher level of intelligence.

[0084] It should be noted that the preset cleaning cycle can be a fixed time, or the cleaning cycle can be a variable value that is automatically adjusted according to the dust level in the environment.

[0085] Of course, in other implementations, the air purifier can also activate the filter cleaning mode based on user commands. For example, users can select to manually perform the filter cleaning mode via voice, touch, or other means.

[0086] In some embodiments, when the air purifier reaches a preset replacement time (where the preset replacement time is less than a preset cleaning cycle), the filter 21 can be rotated 180° to turn the wall-facing side of the filter 21 to the front. Since users typically place air purifiers in corners rather than in the center of a space, the wall-facing side usually doesn't accumulate much dust. Rotating 180 degrees allows the relatively clean wall-facing portion of the filter 21 to be moved to the other side, ensuring even dust collection across the entire filter 21.

[0087] In some embodiments of the above examples, the air purifier has a timer that keeps track of the time during operation. After accumulating a certain amount, such as 24 hours (which can be set by the user), the filter 21 is driven to rotate 180° once and is repeatedly flipped over for use, so as to improve the uniformity of the dust collection effect of the entire filter 21.

[0088] When the preset cleaning cycle is reached, the filter 21 is detected in 360° circumference. When a dirty area that needs to be cleaned is detected, the dirty area is moved to the vacuuming position, eliminating the need to frequently start the vacuuming device 30 for dust removal.

[0089] In some preferred embodiments of the above examples, the control method further includes: automatically adjusting the cleaning cycle based on changes in the light transmittance of the filter 21.

[0090] In the above implementation, if the light transmittance decreases rapidly, it indicates that the environmental quality is poor. Therefore, the cleaning cycle can be shortened to avoid the air purification effect of the air purification equipment being affected by the untimely cleaning of the filter 21. If the light transmittance decreases slowly, it indicates that the environmental quality is good, and the cleaning cycle can be extended to avoid the energy waste caused by frequent cleaning. This achieves intelligent adjustment of the cleaning cycle size, ensuring energy saving and timely cleaning of the whole machine.

[0091] In some embodiments, combined with Figures 1 to 3 as well as Figure 9 As shown, the automatic adjustment of the cleaning cycle based on changes in the light transmittance of filter 21 specifically includes the following steps:

[0092] Step S501: Set the light transmittance of the filter 21 of the new air purifier to X0 = 100%, and the default cleaning cycle of the filter 21 to Y0;

[0093] Step S502: When the time Y0 is reached for the first time after use, obtain the light transmittance X1 of the filter 21 at this time, perform the first cleaning of the filter 21, and reset the timer after cleaning;

[0094] Step S503: When it is determined again that time Y0 has been reached, obtain the light transmittance X2 of filter 21 at this time, and clean filter 21 a second time;

[0095] Step S504: Calculate the rate of change of light transmittance of filter 21 Z1=(X1-X2) / (X0-X1), then the third cleaning cycle is Y1=Y0 / Z1;

[0096] Step S505: Following this pattern, in each subsequent cleaning, apply formula Z... n =(X n -X n+1 ) / (X n-1 -X n Calculate the rate of change Z of the filter transmittance. n And according to formula Y n =Y n-1 / Z n Calculate and update the next cleaning cycle Y n Among them, Z n Y represents the rate of change in filter transmittance calculated before this cleaning. n This is for the next cleaning cycle.

[0097] By adopting the above method, an intelligent logic for timing the whole machine's cleaning cycle is realized, ensuring energy saving and timely cleaning of the whole machine. This effectively avoids the problem of energy waste caused by over-cleaning when the indoor environmental quality is good, and the problem of untimely cleaning when the indoor environmental quality is poor, which causes the air not to be thoroughly purified to threaten human health.

[0098] In some more specific embodiments, the air purification device provided in this embodiment completes the gradient timing of the cleaning cycle by combining the data fed back by the infrared detection device 50:

[0099] When using the air purifier for the first time, the default cleaning cycle is Y0. The default light transmittance of the new filter 21 is X0 = 100%, so the first cleaning cycle is one week, or Y0 = 7 days. After one week, the average infrared transmittance X1 received by the infrared receiver 52 and the infrared generator is read. Then, the second week begins. The average infrared transmittance X2 is calculated for the second cleaning. The rate of change in transmittance compared to the first cleaning is Z1 = (X1 - X2) / (X0 - X1). The third cleaning cycle is Y1 = Y0 / Z1. The average infrared transmittance X3 is calculated for the third cleaning. The rate of change in transmittance compared to the second cleaning is Z2 = (X3 - X2) / (X2 - X1). The fourth cleaning cycle is Y2 = Y1 / Z2, and so on, to obtain the rate of change in transmittance for each cleaning cycle Z1, Z2, ..., Z. n And after each cleaning, the timer calculates the changes in light transmittance based on the rates Y1, Y2, ..., Y... n The system calculates and updates the next cleaning cycle. This can be understood as follows: if the light transmittance decreases rapidly, it indicates a poor environment, so the cleaning cycle will be shortened accordingly. If the light transmittance decreases slowly, it indicates a good environment, so the cleaning cycle will be extended. This avoids the problem of wasting energy caused by frequent cleaning, thereby achieving the purpose of intelligent timing and automatic adjustment of the cleaning cycle.

[0100] In the above embodiment, since the comparison is based on the trend of change, the rate of change, i.e., the gradient, needs to be obtained by dividing the difference. Therefore, the light transmittance change rate will not be obtained in the first week. Two sets of data are required for gradient calculation. Thus, the first and second cleaning cycles are both one week. After the second cleaning, the air purifier will intelligently adjust the cycle for the third detection. Here is an example for easier understanding: If the light transmittance X0 = 100% when filter 21 is received, and the light transmittance measured in the first week is X1 = 99%, and the light transmittance measured in the second week is X2 = 97%, then the light transmittance change rate Z1 = (99% - 97%) / (100% - 99%) = 2. This means that the amount of dust generated from the first to the second week is greater than the amount of dust generated from when the filter was first purchased until the first week, indicating an increasing trend of dust and poor air quality in the surface environment. Therefore, the third detection cycle is shortened to Y1 = Y0 / Z1 = 7 / 2 = 3.5 days, shortening the cleaning cycle and increasing the cleaning frequency.

[0101] In some embodiments, combined with Figures 1 to 3 as well as Figure 10 As shown, after dust removal from the soiled area, the following steps are performed:

[0102] Step S106: Control the filter screen 21 to continue rotating until it is determined that the degree of dirt in all areas of the entire circumference of the filter screen 21 is less than the set dirt threshold, then stop rotating;

[0103] Step S107: End filter cleaning mode.

[0104] In this embodiment, after the image recognition device 40 identifies a dirty area, the filter 21 stops rotating and waits for the infrared detection device 50 to rotate to the corresponding position. The purpose is to ensure that the infrared detection device stops precisely at the dirty area. Then, the infrared detection device 50 further identifies and judges the degree of dirtiness in the dirty area to determine whether cleaning is needed. If so, it controls the filter 21 and the infrared detection device 50 to rotate synchronously. The image recognition device 40 determines whether the dirty area to be cleaned has rotated to the vacuuming position by tracking the position of the infrared detection device 50. Since once the filter 21 rotates to the point where the dirty area leaves the recognition area of ​​the image recognition device 40, the image recognition device 40 will lose the position of the dirty area and cannot determine whether the dirty area has moved to the vacuuming device 30. Therefore, the infrared detection device 50 is kept at the dirty area and rotates with the filter 21. The image recognition device 40 determines whether the dirty area to be cleaned has moved to the vacuuming device 30 based on the position of the infrared detection device 50.

[0105] In a second aspect, the present invention also provides a computer-readable storage medium storing computer instructions for causing a computer to perform the control method described in any of the above embodiments.

[0106] Thirdly, the present invention also provides an air purification device, wherein the air purification device cleans its filter 21 using the control method described in any of the above embodiments.

[0107] In some embodiments, the air purification device includes a housing 10, a filter device 20, a dust collection device 30, and an image recognition device 40. The housing 10 is provided with an air inlet 101 and an air outlet 102. The filter device 20 includes a filter screen 21 rotatably disposed within the housing 10 and a drive mechanism for driving the filter screen 21 to rotate. The filter screen 21 is adapted to filter the air entering the housing 10 through the air inlet 101. The dust collection device 30 is fixedly disposed within the housing 10 and is used to adsorb dust on the filter screen 21. The image recognition device 40 is disposed within the housing 10 and is used to collect image information of the surface of the filter screen 21 and preliminarily identify the dirty areas of the filter screen 21. The infrared detection device 50 is used to perform secondary detection and judgment on the degree of dirtiness of the dirty areas.

[0108] In the above embodiment, the filter screen 21 is cylindrical, and the image recognition device 40 is disposed outside the filter screen 21 and located on one side of the filter screen 21. In the cleaning mode, the filter screen 21 can be rotated by the drive mechanism so that the entire surface of the filter screen 21 can be recognized and detected by the image recognition device 40.

[0109] In some embodiments, the air inlet 101 is disposed on the surrounding sidewalls of the housing 10, and the air outlet 102

[0110] In some embodiments, the infrared detection device 50 includes an infrared generator 51 and an infrared receiver 52 disposed on the inner and outer sides of the filter 21.

[0111] In some embodiments, the filtering device 20 further includes a base 22, which includes a support portion 221 and a rotating portion 222. The rotating portion 222 is rotatably disposed within the support portion 221. The rotating portion 222 includes a first region 2221, a second region 2222, and a third region 2222 arranged sequentially from the center of the base 22 outwards. The first region 2221, the second region 2222, and the second region 2222 are adapted to rotate independently or synchronously. The first region 2221 is disc-shaped, and the second region 2222 and the third region 2223 are annular. The filter 21 is installed in the second region 2222, and one of the infrared generator 51 and the infrared receiver 52 of the infrared detection device 50 is installed in the first region 2221, and the other is installed in the third region 2223.

[0112] In the above embodiment, the support portion 221 is fixedly disposed inside the housing 10, and the rotating portion 222 is rotatably disposed inside the support portion 221. By installing the filter 21 in the second region 2222, and the infrared generator 51 and the infrared receiver 52 are respectively installed in the first region 2221 and the second region 2222, the infrared generator 51 and the infrared receiver 52 can be distributed on the inner and outer sides of the filter 21. At the same time, the first region 2221, the second region 2222 and the second region 2222 can all rotate around the central axis of the base 22, thereby driving the filter 21, the infrared generator 51 and the infrared receiver 52 to rotate.

[0113] In some embodiments, the first region 2221, the second region 2222, and the third region 2223 form what resemble three turntables. The first region 2221, the second region 2222, and the third region 2223 can be connected by a drive mechanism through multiple gears or other transmission components, and their rotation can be controlled individually. Optionally, the drive mechanism is a stepper motor.

[0114] Optionally, the drive mechanism includes three stepper motors. Alternatively, in some embodiments, a single stepper motor combined with a clutch can be used to control the synchronous rotation of the first region 2221, the second region 2222, and the third region 2223 individually or any two or three of them.

[0115] In this embodiment, the infrared generator 51, infrared receiver 52 and filter 21 are located above three independent turntables. The controller can control the rotation of each turntable individually, thereby enabling a turntable to rotate independently or two or three turntables to rotate synchronously.

[0116] In some embodiments, the infrared generator 51 and the infrared receiver 52 are respectively supported and fixed at a first preset height position above the base 22 by the column 53, and the height of the filter 21 is set to H, the first preset height is H1, and 1 / 2H < H1 < H.

[0117] In the above embodiment, since the recognition area of ​​the image recognition device 40 is limited, the dirty area may be no longer in the field of view of the image recognition device 40 when it moves to the vicinity of the vacuum cleaner 30. The infrared generator 51 and the infrared receiver 52 are supported by the column 53 at a first preset height position above the base 22, which makes it convenient for the image recognition device 40 to track and identify the position of the dirty area through the infrared generator 51, the infrared receiver 52, or the column 53.

[0118] Optionally, the column 53 is at the same height as the filter 21, and the height of the column 53 is set to H2, where H2 = H. The infrared generator 51 and the infrared receiver 52 are detachably mounted and fixed on the column 53. The image recognition device 40 tracks and identifies whether the position of the dirty area has rotated to the preset vacuuming position by using the position of the column 53.

[0119] Optionally, the column 53 is a rod-shaped injection molded part. When the air purification equipment is in normal use, the column 53 is located in a corner position and does not affect the air intake.

[0120] In some embodiments, the number of infrared generators 51 and infrared receivers 52 may be one or more, preferably multiple. Multiple infrared generators 51 and multiple infrared receivers 52 are correspondingly arranged on the columns 53 on both the inner and outer sides of the filter 21, and are arranged sequentially along the length of the columns 53. The multiple infrared generators 51 and multiple infrared receivers 52 can improve the accuracy of detection. The light transmittance mentioned above is the average value calculated based on the light transmittance of the multiple infrared generators 51 and multiple infrared receivers 52.

[0121] Optionally, the infrared generator 51 and the infrared receiver 52 are fixed to the column 53 with screws. The infrared generator 51 and the infrared receiver 52 can rotate with the column 53. In this embodiment, the image recognition device 40 relies on the camera to make a preliminary judgment on the dirty area. However, when the dirty area rotates to a certain angle and leaves the camera range, it cannot be located at the vacuum cleaner 30. Therefore, the infrared detection device 50 is used for positioning.

[0122] In some embodiments, the vacuuming device 30 is fixed on the support portion 221 of the base 22 and located on one side of the filter 21. The vacuuming port of the vacuuming device 30 faces the outer periphery of the filter 21 and is spaced apart from the filter 21.

[0123] In the above embodiment, by placing the vacuum cleaner 30 on one side of the filter 21 with a set interval between them, the adsorption effect of the vacuum cleaner 30 on the filter 21 can be ensured, while avoiding the vacuum cleaner 30 interfering with the rotation of the filter 21.

[0124] In some preferred embodiments, the vacuuming device 30 is a columnar vacuum cleaner and is located in a corner of the air purification device so as not to affect the air intake.

[0125] In some embodiments, a bracket 23 is fixedly provided on the support portion 221 of the base 22. The bracket 23 is located outside the filter 21 and is spaced apart from the filter 21. The image recognition device 40 includes an image acquisition unit, which is fixedly disposed on the bracket 23 at a second preset height position.

[0126] In the above embodiment, the image recognition device 40 is supported at a second preset height position by the bracket 23, which can increase the field of view of the image recognition device 40 and facilitate its tracking of the location of the dirty area to be cleaned by the infrared detection device 50.

[0127] In some specific embodiments, the second preset height is higher than the filter 21, that is, the image acquisition unit is higher than the filter 21. This makes it easier for the image recognition device 40 to track whether the dirty area to be cleaned has been rotated to the vacuuming position based on the infrared detection device 50. Optionally, the image acquisition unit is a small camera.

[0128] In some embodiments, the image recognition device 40 and the vacuuming device 30 are disposed on the same side of the filter 21, and the angle between the image recognition device 40 and the vacuuming device 30 and the central axis of the filter 21 is less than 180°. This makes it easier for the image recognition device 40 to track the rotational position of the dirty area that needs to be cleaned.

[0129] In some embodiments, the top of the housing 10 is provided with an operation panel 103, which allows the user to operate the air purification device and also displays the operating parameters of the air purification device. The operation panel 103 is located at the center of the top of the housing 10, and the air outlet 102 is provided on the top wall of the housing 10 on the outer periphery of the operation panel 103.

[0130] The air purification device in this embodiment is an air purifier, and its working principle is as follows:

[0131] Under normal user operation, filter 21 does not rotate, and infrared detection device 50 is located in the corner of housing 10 to avoid obstructing air inlet 101 and thus not affecting air intake. Image recognition device 40 is in the off state. When the user turns off the air purifier, if the cumulative time required for filter 21 to be detected or cleaned has been reached, the operation panel 103 will pop up to indicate that the device is in detection mode, reminding the user not to disconnect the plug, i.e., not to cut off the power. At the same time, the drive mechanism drives the rotating base 22 to move filter 21 to begin a 360° inspection. At this time, image recognition device 40 is in the on state, and infrared generator 51 and infrared receiver 52 inside and outside filter 21 begin to work. The judgment logic is as follows:

[0132] First, the image recognition device 40 is used to initially determine the foreign matter situation on the surface of the filter 21. If a thick layer of dust and foreign matter is observed on a certain area, the filter 21 stops rotating. The infrared generator 51 and infrared receiver 52 are moved to the position corresponding to the dirty area, and a second identification and detection is performed on the area. When the infrared generator 51 and infrared receiver 52 detect that the dust and foreign matter on the surface of the dirty area is greater than the set dirt threshold, the infrared detection device 50 is controlled to rotate synchronously with the filter 21. The image recognition device 40 determines whether it has moved to the vacuum cleaner by tracking the infrared generator 51 and / or infrared receiver 52 and / or column 53. If it is determined that the infrared detection device 50 has moved to the vacuum cleaner position, it means that the dirty area of ​​the filter 21 that is in poor condition has moved to the vacuum cleaner 30. After reaching it, the filter 21 stops rotating, and the infrared detection device 50 continues to rotate away to prevent affecting the operation of the vacuum cleaner 30.

[0133] Because the image recognition device 40 cannot detect fine dust particles and filter 21 blockage, in order to improve the accuracy of detection, this embodiment uses an infrared detection device 50 for a second round of inspection. If the infrared receiver 52 can receive more than 70% of the infrared light generated by the generator, it means that the dust coverage in this area of ​​the filter 21 is acceptable and does not need to be cleaned. If the infrared receiver 52 cannot receive more than 70% of the infrared light, it means that the dust particles in this area of ​​the filter 21 have accumulated to a certain extent, increasing the air intake resistance and motor power consumption, and the dirty area needs to be cleaned. At this time, the filter 21 stops rotating, and then the infrared generator 51 and the infrared receiver 52 rotate synchronously with the filter 21. The image recognition device 40 determines whether the infrared detection device 50 has rotated to the vacuum cleaner 30. If the infrared detection device 50 rotates, it means that the dirty area of ​​the filter 21 to be cleaned has been moved to the vacuum cleaner 30. After reaching the vacuum cleaner 30, the filter 21 stops rotating, and the infrared detection device 50 continues to rotate away to prevent affecting the operation of the vacuum cleaner 30. Once a certain area has been purified, continue to perform a 360° check from that location until all areas of filter 21 are ensured to be clean.

[0134] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A control method for an air purification device, characterized in that, The control method includes: Activate the filter cleaning mode and control the filter rotation; Collect image information of the filter surface, and preliminarily identify the dirty areas of the filter based on the image information; The infrared detection device is controlled to perform a secondary detection of the degree of dirtiness in the dirty area, and to determine whether the degree of dirtiness is greater than or equal to a set dirtiness threshold. If yes, the system controls the dirty area to rotate to the preset vacuuming position and starts the vacuuming device to remove dust from the dirty area; if no, the system controls the filter to continue rotating to identify and detect the next area.

2. The control method for the air purification equipment according to claim 1, characterized in that, The process of acquiring image information of the filter surface and initially identifying dirty areas of the filter based on the image information, and controlling the infrared detection device to perform a secondary detection of the degree of dirtiness in the dirty areas and determine whether the degree of dirtiness is greater than or equal to a set dirtiness threshold, specifically includes the following steps: The image recognition device is controlled to collect information about the filter surface, and when a dirty area is detected, the filter is controlled to stop rotating. Control the infrared detection device to rotate to the position corresponding to the dirty area, so as to perform a secondary detection and judgment on the degree of dirtiness of the dirty area; When the degree of dirtiness in the dirty area is determined to be greater than or equal to the set dirtiness threshold, the infrared detection device is controlled to rotate synchronously with the filter. At the same time, the image recognition device determines whether the dirty area has moved to the vacuuming position by tracking the position of the infrared detection device.

3. The control method for the air purification equipment according to claim 2, characterized in that, After the image recognition device determines whether the dirty area has moved to the vacuuming position by tracking the position of the infrared detection device, it also includes the following steps: When it is determined that the dirty area has been moved to the vacuuming position, the filter is controlled to stop rotating, and at the same time the infrared detection device is controlled to rotate to a position away from the vacuuming position.

4. The control method for the air purification device according to any one of claims 1 to 3, characterized in that, The filter is cylindrical, and the infrared detection device includes an infrared generator and an infrared receiver respectively disposed on the inner and outer sides of the filter. The control of the infrared detection device to perform secondary detection of the degree of dirt in the dirty area specifically includes the following steps: Control the infrared generator to emit infrared light towards the dirty area; The amount of infrared light received by the infrared receiver is obtained, the light transmittance of the dirty area is calculated, and the degree of dirtiness of the dirty area is determined based on the light transmittance.

5. The control method for the air purification device according to any one of claims 1 to 3, characterized in that, The control method further includes: The cleaning cycle is automatically adjusted based on changes in the amount of light transmitted through the filter.

6. The control method for the air purification equipment according to claim 5, characterized in that, The automatic adjustment of the cleaning cycle based on changes in filter light transmittance specifically includes: The light transmittance of the filter in the new air purifier is set to X0 = 100%, and the default cleaning cycle of the filter is Y0. When the time Y0 is reached for the first time after use, the light transmittance X1 of the filter is obtained at this time, and the filter is cleaned for the first time. The timer is reset after cleaning. When time Y0 is reached again, obtain the light transmittance X2 of the filter at this time, and perform a second cleaning of the filter; Calculate the rate of change of light transmittance of the filter Z1 = (X1-X2) / (X0-X1), then the third cleaning cycle is Y1 = Y0 / Z1; Similarly, in each subsequent cleaning, formula Z is used. n =(X n -X n+1 ) / (X n-1 -X n Calculate the rate of change Z of the filter transmittance. n And according to formula Y n =Y n-1 / Z n Calculate and update the next cleaning cycle Y n Among them, Z n Y represents the rate of change in filter transmittance calculated before this cleaning. n This is for the next cleaning cycle.

7. The control method for the air purification device according to any one of claims 1 to 3, characterized in that, After dust removal from the soiled area, the following steps are performed: The filter continues to rotate until it is determined that the level of dirt in all areas of the filter's circumference is less than the set dirt threshold, at which point the rotation stops and the filter cleaning mode ends.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the control method according to any one of claims 1 to 7.

9. An air purification device, characterized in that, The air purification device uses the control method described in any one of claims 1 to 7 to clean its filter.

10. The air purification device according to claim 9, characterized in that, The air purification device includes: The casing has an air inlet and an air outlet. A filtration device includes a filter screen rotatably disposed within the housing and a drive mechanism for driving the filter screen to rotate; A dust collection device is fixedly installed inside the housing and is used to collect dust from the filter screen; An image recognition device is installed inside the housing to collect image information of the filter surface and preliminarily identify the dirty areas of the filter. An infrared detection device is used to perform secondary detection and judgment on the degree of dirtiness in the dirty area.

11. The air purification device according to claim 10, characterized in that, The filtration device further includes a base, the base comprising: Supporting components; The rotating part is rotatably disposed within the supporting part. The rotating part includes a first region, a second region, and a third region arranged sequentially from the center of the base outwards. The first region, the second region, and the third region are adapted to rotate independently or synchronously. The first region is disc-shaped, while the second and third regions are annular. The filter is installed in the second region, and one of the infrared generator and infrared receiver of the infrared detection device is installed in the first region, while the other is installed in the third region.

12. The air purification device according to claim 11, characterized in that, The infrared generator and infrared receiver are respectively fixed at a first preset height position above the base by a column. The height of the filter is set to H, the first preset height is H1, and 1 / 2H < H1 < H.

13. The air purification device according to claim 11, characterized in that, The vacuuming device is fixed on the support portion of the base and located on one side of the filter screen. The vacuuming port of the vacuuming device faces the outer periphery of the filter screen and is spaced at a predetermined interval from the filter screen.

14. The air purification device according to claim 11, characterized in that, A bracket is fixedly provided on the support portion of the base. The bracket is located outside the filter and is spaced at a predetermined interval from the filter. The image recognition device includes an image acquisition unit, which is fixedly installed on the bracket at a second predetermined height position.

Images