Air purifier and control method therefor

Abstract

The present application provides an air purifier and a control method therefor. The air purifier comprises a housing, a purification device, and a dust suction device. The purification device is provided in the housing and provided with a purification filter screen for filtering air, the dust suction device is provided in the housing and comprises a dust suction assembly and a wheel disc assembly, the dust suction assembly is mounted on the wheel disc assembly, a dust suction head is used for suctioning pollutants adhering to the outer side of the purification filter screen, the purification filter screen is rotatably connected to the central portion of the wheel disc assembly, the dust suction head comprises a suction nozzle in contact with the outer side of the purification filter screen, and the suction nozzle is made of an elastic material.

Description

Air purifier and control method thereof

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on April 2, 2024, with application number 202410399459.7 and application name “Air Purifier and Control Method Thereof”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application belongs to the technical field of electrical equipment, and more specifically, relates to an air purifier and a control method thereof. Background Art

[0003] An air purifier is an electrical appliance used to improve air cleanliness. It can absorb various pollutants in the air, such as hair, dust, PM2.5, etc.

[0004] The air purifier includes a body, a filter and a cleaning device. The cleaning device has a brush structure, and the surface of the filter can be cleaned by rotating the brush structure.

[0005] Since the dust collection device uses a brush structure to scrape the filter to clean it, the bristles become entangled with hair and accumulate dust, making it difficult to continue to effectively clean the filter. This causes the filter to breed bacteria and viruses and emit odors, seriously affecting the user's health. Therefore, there are problems with the air purifier's filter cleaning effect being poor and the filter's service life being short.

[0006] Application Contents

[0007] One of the purposes of the embodiments of the present application is to provide an air purifier to solve the technical problem in the related art that the dust cleaning device of the air purifier uses a brush structure to scrape the filter to clean the filter, and the bristles of the brush structure are entangled with hair and accumulate dust during the cleaning process, which makes it difficult to continue to effectively clean the filter, resulting in poor cleaning effect and short service life of the filter of the air purifier.

[0008] In order to solve the above-mentioned technical problems, in the first aspect, an embodiment of the present application provides an air purifier, which includes a shell, a purification device and a dust suction device. The purification device is arranged inside the shell, and the purification device is provided with a purification filter for filtering the air; the dust suction device is arranged inside the shell, and the dust suction device includes a dust suction head and a wheel assembly. The dust suction head is used to absorb pollutants attached to the outside of the purification filter, and the purification filter is rotatably connected to the middle part of the wheel assembly; the dust suction head is provided with a suction nozzle that contacts the outside of the purification filter, and the suction nozzle is made of elastic material.

[0009] The beneficial effect of the air purifier provided by the present application is that: by arranging a shell, a purification device and a dust collection device to cooperate with each other, the purification filter of the purification device is used to filter the air in the shell, so that pollutants adhere to the purification filter, thereby producing the effect of purifying the air, and the dust collection device cleans the purification filter, so that the air purifier can realize the function of cleaning the purification filter. Compared with the air purifier in the related art, the dust collection device of the present application adopts a method of applying suction on the outside of the purification filter by a dust collection component to absorb and collect pollutants on the outside of the purification filter, which can reduce the entanglement or clogging of the dust collection component by the pollutants, so that the dust collection component can continuously and efficiently clean the purification filter. By rotating the purification filter by the wheel assembly, pollutants along the four sides of the purification filter can be absorbed and collected by the dust collection component, so that the overall purification filter is cleaner. The suction nozzle is in close contact with the outside of the purification filter. The suction nozzle is made of elastic material, which can improve the air tightness of the suction nozzle, so that the suction force of the dust collection head is greater, so as to absorb pollutants deeper in the purification filter and reduce the situation of pollutants clogging the suction nozzle, thereby making the cleaning effect of the purification filter better and the service life of the purification filter longer.

[0010] In a feasible technical solution, one end of the suction nozzle extends toward the direction adjacent to the wheel disc assembly and has a dust suction gap.

[0011] In a feasible technical solution, the outer side of the purification filter and the wheel assembly are enclosed to form a dust collecting groove, and one end of the suction nozzle provided with the dust suction notch is placed at the opening of the dust collecting groove.

[0012] In a feasible technical solution, the suction nozzle is provided with a plurality of dust collection gaps at intervals.

[0013] In a feasible technical solution, the dust collection device further includes a dust collection box, which is detachably connected to a side of the wheel assembly facing away from the purification filter, and the dust collection head is fluidically connected to the dust collection box.

[0014] In a feasible technical solution, the opposite sides of the wheel assembly are respectively enclosed with the inner wall of the shell to form a first chamber and a second chamber, the wheel assembly has a return air hole, the purification filter and the dust collector head are both placed in the first chamber, and the dust box is placed in the second chamber.

[0015] In a feasible technical solution, the dust collection device further includes a sliding assembly, which includes a tray and a bracket. The tray is used to place the dust box, and the tray is slidably assembled with the bracket.

[0016] In a feasible technical solution, the dust box is provided with a first through hole, a dust filter covering the first through hole is provided inside the dust box, and a dust suction motor is installed on the outside of the dust box at the first through hole.

[0017] In a second aspect, an embodiment of the present application further provides a control method for an air purifier, which is applicable to the above-mentioned air purifier, and the control method includes:

[0018] The purification device operates at a first power, and the dust collection device operates at a second power, which is greater than the first power.

[0019] The beneficial effects of the control method provided in this application are that it can improve the cleaning effect of the purification filter and extend the service life of the purification filter.

[0020] In a feasible technical solution, the purification device and the dust collection device are started and shut down at the same time; or, the purification device is started before the dust collection device and shut down at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] FIG1 is a schematic structural diagram of an air purifier provided in an embodiment of the present application;

[0023] FIG2 is a cross-sectional view of an air purifier according to an embodiment of the present application;

[0024] FIG3 is a schematic structural diagram of a dust collection device according to an embodiment of the present application;

[0025] FIG4 is an enlarged view of point A in FIG3 in an embodiment of the present application;

[0026] FIG5 is a disassembled diagram of the dust collection device according to an embodiment of the present application;

[0027] FIG6 is an inverted view of FIG5 according to an embodiment of the present application;

[0028] FIG7 is a schematic structural diagram of the dust collection motor in an embodiment of the present application.

[0029] In the figures, the following reference numerals are indicated: 10, housing; 11, top cover; 12, base; 13, outer shell; 101, first chamber; 102, second chamber; 103, air outlet; 104, air inlet; 105, opening for removing the cartridge; 20, purification device; 21, purification filter; 211, first stopper; 22, fan; 23, wind wheel; 24, wind hood; 30, dust collection device; 31, dust collection head; 311, suction nozzle; 312, dust collection pipe; 32, wheel assembly; 321. First wheel disc; 322. Second wheel disc; 323. Drive motor; 324. Second stopper; 325. Gear teeth; 33. Dust box; 331. Dust filter; 332. Hook; 333. Press switch; 34. Sliding assembly; 341. Tray; 342. Bracket; 343. Cover; 344. Tension spring; 35. Dust suction motor; 351. Ventilation sponge; 301. Dust suction notch; 302. Dust collecting groove; 303. Dust suction gap; 304. Return air hole; 305. Dust collection opening; 306. First through hole; 307. Second through hole; 308. Air duct outlet; 40. Dust sensor. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0031] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0034] The following is a detailed description with reference to the accompanying drawings and embodiments:

[0035] Please refer to Figures 1 to 3 together. An embodiment of the present application provides an air purifier, which includes a shell 10, a purification device 20 and a dust collection device 30. The purification device 20 is arranged inside the shell 10. The purification device 20 is provided with a purification filter 21 for filtering air. The dust collection device 30 is arranged inside the shell 10. The dust collection device 30 includes a dust collection head 31 and a wheel assembly 32. The dust collection head 31 is used to absorb pollutants attached to the outside of the purification filter 21. The purification filter 21 is rotatably connected to the middle of the wheel assembly 32. The dust collection head 31 is provided with a suction nozzle 311 that contacts the outside of the purification filter 21. The suction nozzle 311 is made of elastic material.

[0036] By setting up the shell 10, the purification device 20 and the dust collection device 30 to cooperate with each other, the purification filter 21 of the purification device 20 is used to filter the air entering the shell 10, so that pollutants adhere to the purification filter 21, thereby purifying the air. The dust collection device 30 cleans the purification filter 21, so that the air purifier can realize the function of cleaning the purification filter.

[0037] The dust suction device 30 uses a dust suction head 31 to apply suction on the outside of the purification filter 21 to absorb pollutants on the outside of the purification filter 21, which can reduce the entanglement or clogging of the purification filter 21 by pollutants. The purification filter 21 is rotated by the wheel assembly 32, so that pollutants on all sides of the purification filter 21 can be absorbed by the dust suction head 31, so that the purification filter 21 as a whole is cleaner; the suction nozzle 311 is in close contact with the outside of the purification filter 21, and the suction nozzle 311 is made of elastic material, which can improve the air tightness of the suction nozzle 311, so that the suction force of the dust suction head 31 is greater, so as to absorb pollutants deeper in the purification filter 21 and reduce the probability of pollutants clogging the suction nozzle 311, thereby making the cleaning effect of the purification filter 21 better and the service life of the purification filter 21 longer.

[0038] In use, the suction nozzle 311 can be made of silicone or soft plastic. The dust collector head 31 is arranged tangentially to the purification filter 21. The suction nozzle 311 points to the central axis of the purification filter 21 in the height direction. The suction nozzle 311 is abutted against the purification filter 21. The suction nozzle 311 can fit tightly against the purification filter 21 under the action of elastic deformation, thereby improving the airtightness inside the suction nozzle 311 and preventing hair in the pollutants from being entangled in the suction nozzle 311, so that the dust collector head 31 can adsorb pollutants more efficiently. In use, the housing 10 has a hollow structure. The housing 10 includes a top cover 11, a base 12 and an outer shell 13. The top cover 11 and the base 12 are respectively bolted or snap-connected to opposite sides of the outer shell 13 in the height direction. The purification device 20 and the dust collection device 30 are installed in sequence from top to bottom along the height direction of the outer shell 13. The top cover 11 is provided with an air outlet 103, and the side wall of the outer shell 13 adjacent to the purification filter 21 is provided with multiple air inlet holes 104.

[0039] In application, the purification device 20 includes a fan 22, a wind wheel 23 and a wind cover 24. The fan 22 is connected to the top cover 11, the wind wheel 23 is installed at the output end of the fan 22, the wind cover 24 is connected to the inner wall of the outer shell 13, and the purification filter 21 is mounted on the outer periphery of the wind cover 24, allowing air to enter from the air inlet 104 and flow out from the air outlet 103, thereby generating negative pressure in the shell 10.

[0040] In application, the purification device 20 has different gears to correspond to different air volumes. A dust sensor 40 is also installed inside the shell 10. The dust sensor 40 is used to detect the real-time PM2.5 value of the air entering the shell 10 to obtain the total accumulated amount of particulate matter in the purification filter 21. The purification device 20, the dust collection device 30 and the dust sensor 40 are electrically connected and controlled by a software program. The shell 10 is provided with a control panel. The user operates the control panel to make the purification device 20 and the dust collection device 30 execute different commands.

[0041] In application, the purification filter 21 includes multiple stacked filter layers. The purification filter 21 has an overall hollow cylindrical structure to filter pollutants of different particle sizes. The central axis of the purification filter 21 along the height direction coincides with the central axis of the shell 10 along the height direction, so that the dust collection device 30 can evenly clean all parts of the purification filter 21 along the four sides.

[0042] In application, the wheel assembly 32 also includes a first wheel 321 and a second wheel 322. The second wheel 322 is rotatably connected to the middle of the first wheel 321. The dust collector head 31 is vertically connected to the edge of the first wheel 321. The purification filter 21 is rotatably connected to the second wheel 322. The first wheel 321 is equipped with a drive motor 323. The drive motor 323 is used to drive the edge of the second wheel 322 to drive the edge of the purification filter 21 to rotate, so that the dust collector head 31 can absorb pollutants from all parts of the purification filter 21 around it to make the purification filter 21 cleaner as a whole.

[0043] Specifically, the second wheel disc 322 is arranged concentrically with the purification filter 21 and the outer diameter decreases successively. A first stop portion 211 is provided on one side of the edge of the purification filter 21, and a second stop portion 324 and a gear 325 are provided on opposite sides of the edge of the second wheel disc 322. The output end of the drive motor 323 is connected to a gear meshing with the gear 325 to drive the edge of the second wheel disc 322 to rotate. After the second stop portion 324 rotates to against the first stop portion 211, it can drive the purification filter 21 to rotate, and the rotation of the purification filter 21 is smoother and more stable.

[0044] Specifically, the number of the first stopping parts 211 and the second stopping parts 324 is the same and multiple first stopping parts 211 and multiple second stopping parts 324 correspond one to one, so that the rotation cooperation between the second wheel 322 and the purification filter 21 is more stable.

[0045] Understandably, in other embodiments of the present application, the wheel assembly 32 is only provided with a first wheel 321, the purification filter 21 is rotatably connected to the middle of the first wheel 321, and the first wheel 321 is installed with a drive motor 323, which is used to drive the purification filter 21 to rotate.

[0046] In one embodiment, referring to FIG. 3 to FIG. 6 , one end of the suction nozzle 311 extends toward the direction adjacent to the wheel assembly 32 and has a dust suction gap 301 .

[0047] In application, the dust collection gap 301 is used to absorb pollutants that fall from the outside of the purification filter 21 to the wheel assembly 32, which can prevent these pollutants from re-adhering to the purification filter 21, thereby making the cleaning effect of the purification filter 21 better and the service life of the purification filter 21 longer.

[0048] In one embodiment, referring to FIG. 3 to FIG. 6 , the outer side of the purification filter 21 and the wheel assembly 32 are enclosed to form a dust collecting groove 302 , and one end of the suction nozzle 311 having a dust collecting notch 301 is placed at the opening of the dust collecting groove 302 .

[0049] During use, when the dust collector head 31 absorbs pollutants from the purification filter 21, some of the pollutants will fall onto the wheel assembly 32. The dust collecting groove 302 is used to collect these pollutants and allow these pollutants to be sucked away by the suction nozzle 311 through the dust collection gap 301, thereby preventing these pollutants from re-attaching to the purification filter 21.

[0050] In one embodiment, referring to FIG. 3 to FIG. 6 , the suction nozzle 311 is provided with a plurality of dust collecting gaps 303 spaced apart from each other.

[0051] During use, the suction nozzle 311 is provided with a dust suction gap 303 so that the entire suction nozzle 311 can be intermittently bent after being subjected to negative pressure. Large particles of pollutants placed on the outside of the suction nozzle 311 can still break through the obstruction of the suction nozzle 311 and enter the interior of the suction nozzle 311, thereby enabling the dust collector head 31 to take into account both suction strength and adsorption efficiency.

[0052] In one embodiment, please refer to Figures 1 to 6 together. The dust collection device 30 also includes a dust collection box 33. The dust collection box 33 is detachably connected to the side of the wheel assembly 32 away from the purification filter 21. The dust collection head 31 is fluidically connected to the dust collection box 33.

[0053] In use, the dust collector head 31 has a hollow structure, and a dust collection tube 312 is connected between the dust collector head 31 and the dust collection box 33, so that the pollutants sucked by the dust collector head 31 are collected in the dust collection box 33 through the dust collection tube 312. The side wall of the shell 13 is provided with a box removal opening 105 corresponding to the position of the dust collection box 33. The box removal opening 105 is used to take the dust collection box 33 out of the shell 13, so as to facilitate the user to remove the pollutants collected by the dust collection box 33.

[0054] In one embodiment, please refer to Figures 1 to 6 together. The opposite sides of the wheel assembly 32 are respectively enclosed with the inner wall of the shell 10 to form a first chamber 101 and a second chamber 102. The wheel assembly 32 has a return air hole 304. The purification filter 21 and the dust collector head 31 are both placed in the first chamber 101, and the dust box 33 is placed in the second chamber 102.

[0055] In application, the first chamber 101 and the second chamber 102 can be connected only through the return air hole 304 to achieve their respective airtightness.

[0056] Specifically, when the purification device 20 is started, the fan 22 drives the wind wheel 23 to rotate to generate negative pressure at the wind cover 24, so that the air outside the shell 13 enters the first chamber 101 through the air inlet 104, and then flows through the purification filter 21 and out of the air outlet 103. During this process, pollutants will adhere to the purification filter 21, so that the air purifier can purify the air.

[0057] Specifically, when the dust suction device 30 is started, the purification filter 21 rotates around its central axis, and the pollutants on the outside of the purification filter 21 are sucked into the dust suction head 31 by the suction nozzle 311 and collected in the dust collection box 33 through the dust suction pipe 312, so that the dust suction device 30 can clean the purification filter 21.

[0058] In one embodiment, please refer to Figures 1 to 6 together. The dust collection device 30 further includes a sliding assembly 34. The sliding assembly 34 includes a tray 341 and a bracket 342. The tray 341 is for placing the dust box 33. The tray 341 and the bracket 342 are slidably assembled.

[0059] In application, two brackets 342 are provided, and the opposite sides of the tray 341 correspond to the two brackets 342 one by one. A tension spring 344 is connected between each bracket 342 and one side of the corresponding tray 341. One side of the dust box 33 is placed at the box removal opening 105 of the shell 13, and the other side is provided with a hook 332. The base 12 is installed with a press switch 333 adapted to the hook 332. By pressing the dust box 33, the hook 332 and the press switch 333 can be locked or separated. Under the elastic force of the tension spring 344, the tray 341 slides relative to the bracket 342, and the operation of putting the dust box 33 into or taking it out of the second chamber 102 is simpler, and the cleaning of the dust box 33 is more convenient.

[0060] It is understandable that in another embodiment of the present application, the tray 341 and the bracket 342 are slidably assembled by an electric push rod. In other embodiments of the present application, the tray 341 and the bracket 342 are slidably assembled by magnets and iron sheets using magnetic attraction.

[0061] In use, the dust box 33 has a dust collection opening 305 on a side facing away from the tray 341 . The sliding assembly 34 further includes a cover 343 for closing the dust collection opening 305 . The cover 343 is tilted relative to the surface where the tray 341 is located.

[0062] In use, the cover 343 is fixedly mounted on the wheel assembly 32, and the opposite side walls of the dust box 33 are wedge-shaped. When the dust box 33 moves to the end near the tray 341, the cover 343 fits tightly against the dust box 33 to reduce the friction resistance generated by the cover 343 on the dust box 33 during the sliding process of the dust box 33, so that the sliding of the dust box 33 is smoother.

[0063] In one embodiment, please refer to Figures 1 to 7 together. The dust box 33 is provided with a first through hole 306, the interior of the dust box 33 is provided with a dust removal filter 331 covering the first through hole 306, and the outside of the dust box 33 is provided with a dust suction motor 35 at the first through hole 306.

[0064] In use, the side wall of the dust box 33 having the first through hole 306 is also provided with a second through hole 307. The dust suction tube 312 is installed in the second through hole 307 through the second joint. The dust suction motor 35 is installed in the first through hole 306 through the first joint. The dust suction motor 35 is surrounded by an air duct outlet 308. The interior of the dust box 33 is connected to the second chamber 102 through the air duct outlet 308.

[0065] Specifically, starting the dust collection motor 35 can generate negative pressure in the dust collection box 33. The air sucked in by the suction nozzle 311 flows through the dust collection tube 312 and enters the dust collection box 33 from the second through hole 307, and flows through the main body of the dust collection motor 35 through the first through hole 306 and enters the second chamber 102 from the air duct outlet 308. The dust removal filter 331 is used to filter the air flowing out of the dust collection box 33 again in this process to reduce air pollution in the second chamber 102.

[0066] In application, the dust removal filter 331 includes a steel mesh layer, a filter cotton layer, a sponge layer and a HEPA filter layer which are stacked in sequence. The steel mesh layer is used to filter hair and visible debris. The filter cotton layer uses synthetic fiber cotton material and is used to filter larger dust particles. The sponge layer is used to filter larger dust particles. The HEPA High-Efficiency Particulate Air High-Efficiency Particulate Air filter layer uses PP melt-blown composite PET skeleton material and is used to filter more than 95% of PM2.5 particles. The dust removal filter 331 adopts a multi-layer design, which can be graded for filtration, reduce particle clogging, and achieve a high-efficiency filtration effect of the dust removal filter 331.

[0067] In use, a ventilation sponge 351 is provided on the outside of the dust collection motor 35. The ventilation sponge 351 is used to filter the air discharged from the air duct outlet 308 of the dust collection motor 35 to the second chamber 102. Under the negative pressure of the purification device 20, this part of the air can flow to the first chamber 101 again through the return air hole 304 and be filtered through the purification filter 21, thereby reducing the secondary pollution caused by this part of the air, making the purification effect of the air purifier better.

[0068] Please refer to Figures 1 to 7 together. This application also provides a control method for an air purifier, which is applicable to the above-mentioned air purifier. The control method includes: the purification device 20 operates at a first power, and the dust collection device 30 operates at a second power, and the second power is greater than the first power.

[0069] In application, the dust sensor 40 obtains the real-time concentration of particulate matter in the air entering the shell 10. The product of the operating air volume of the purification device 20, the operating time of the purification device 20 and the real-time concentration of particulate matter can be used to calculate the total amount of particulate matter accumulated outside and inside the purification filter 21.

[0070] During application, the dust collection device 30 operates at a second power, and the dust collection motor 35 generates a second air volume at the suction nozzle 311 of the dust collection head 31, which is used to suck the particles attached to the purification filter 21 in the first chamber 101 into the dust collection box 33, wherein some of the particles in the dust collection box 33 will pass through the air duct outlet 308 of the dust collection motor 35 and enter the second chamber 102; the purification device 20 operates at a first power, and the fan 22 generates a first air volume at the wind cover 24, and the first air volume is smaller than the second air volume, which is used to allow the particulate matter to pass through the return air hole 304 into the first chamber 101 and re-attach to the purification filter 21, thereby preventing the particulate matter from spreading into the room through the air inlet hole 104 of the outer shell 13, and achieving better purification effect.

[0071] Specifically, in one embodiment of the present application, when the total amount of particulate matter accumulated on the outside and inside of the purification filter 21 reaches the design value, the purification device 20 and the dust collection device 30 are automatically turned on under software control. It is understandable that in other embodiments of the present application, the user can also manually control the opening of the purification device 20 and the dust collection device 30.

[0072] In one embodiment, please refer to FIG. 1 to FIG. 7 . When the air purifier is turned on to clean the filter 21 , the purification device 20 and the dust collection device 30 are started and shut down at the same time.

[0073] During use, the purification device 20 and the dust collection device 30 are started at the same time; a first air volume is generated at the dust collection head 31, and the particles on the purification filter 21 are sucked into the dust collection box 33, and a part of the particles pass through the dust collection motor 35 and enter the second chamber 102; at the same time, a second air volume is generated at the wind cover 24, and this part of the particles enters the first chamber 101 and adheres to the purification filter 21, and the dust collection head 31 then sucks away this part of the particles; the purification device 20 and the dust collection device 30 run together for a period of time and then turn off at the same time.

[0074] In one embodiment, please refer to Figures 1 to 7 together. When the air purifier starts to clean the purification filter 21, the purification device 20 is started before the dust collection device 30 and is turned off at the same time. In application, the purification device 20 is started to run for a first period of time, the wind cover 24 generates a second air volume, and the particles remaining in the second chamber 102 enter the first chamber 101 and adhere to the purification filter 21; the dust collection device 30 is started, and the dust collection head 31 generates a first air volume. The particles on the purification filter 21 are sucked into the dust collection box 33, of which a part of the particles passes through the dust collection motor 35 and enters the second chamber 102. The part of the particles are sucked into the first chamber 101 and adhere to the purification filter 21, and the dust collection head 31 then sucks away the part of the particles; the purification device 20 and the dust collection device 30 run together for a second period of time and then are turned off at the same time.

[0075] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An air purifier, wherein: include: Housing (10); A purification device (20) is disposed inside the housing (10), and the purification device (20) is provided with a purification filter (21) for filtering air; A dust collecting device (30) is arranged inside the housing (10), the dust collecting device (30) comprising a dust collecting head (31) and a wheel assembly (32), the dust collecting head (31) being used to absorb pollutants attached to the outside of the purification filter (21), and the purification filter (21) being rotatably connected to the middle portion of the wheel assembly (32); The dust collector head (31) is provided with a suction nozzle (311) in contact with the outer side of the purification filter (21), and the suction nozzle (311) is made of elastic material.

2. The air purifier according to claim 1, wherein One end of the suction nozzle (311) extends toward the direction adjacent to the wheel assembly (32) and has a dust suction notch (301).

3. The air purifier according to claim 2, wherein: The outer side of the purification filter (21) and the wheel assembly (32) are enclosed to form a dust collecting groove (302), and one end of the suction nozzle (311) provided with the dust collecting notch (301) is placed at the opening of the dust collecting groove (302).

4. The air purifier according to claim 1, wherein The suction nozzle (311) is provided with a plurality of dust suction gaps (303) at intervals.

5. The air purifier according to any one of claims 1 to 4, wherein The dust collecting device (30) further comprises a dust collecting box (33), wherein the dust collecting box (33) is detachably connected to a side of the wheel assembly (32) facing away from the purification filter (21), and the dust collecting head (31) is fluidically connected to the dust collecting box (33).

6. The air purifier according to claim 5, wherein: The opposite sides of the wheel assembly (32) are respectively enclosed with the inner wall of the shell (10) to form a first chamber (101) and a second chamber (102); the wheel assembly (32) has a return air hole (304); the purification filter (21) and the dust collector head (31) are both placed in the first chamber (101); and the dust box (33) is placed in the second chamber (102).

7. The air purifier according to claim 5, wherein: The dust collecting device (30) further comprises a sliding assembly (34), wherein the sliding assembly (34) comprises a tray (341) and a bracket (342), wherein the tray (341) is for placing the dust collecting box (33), and the tray (341) is slidably assembled with the bracket (342).

8. The air purifier according to claim 5, wherein: The dust collecting box (33) is provided with a first through hole (306), the interior of the dust collecting box (33) is provided with a dust removal filter (331) covering the first through hole (306), and the outer side of the dust collecting box (33) is provided with a dust collecting motor (35) at the first through hole (306).

9. A method for controlling an air purifier, wherein: The air purifier comprises: Housing (10); A purification device (20) is disposed inside the housing (10), and the purification device (20) is provided with a purification filter (21) for filtering air; A dust collecting device (30) is arranged inside the housing (10), the dust collecting device (30) comprising a dust collecting head (31) and a wheel assembly (32), the dust collecting head (31) being used to absorb pollutants attached to the outside of the purification filter (21), and the purification filter (21) being rotatably connected to the middle portion of the wheel assembly (32); The dust collector head (31) is provided with a suction nozzle (311) in contact with the outer side of the purification filter (21), and the suction nozzle (311) is made of elastic material; The control method includes: The purification device (20) operates at a first power, and the dust collection device (30) operates at a second power, wherein the second power is greater than the first power.

10. The control method according to claim 9, wherein: The purification device (20) and the dust collection device (30) are started and shut down at the same time; or, the purification device (20) is started before the dust collection device (30) and shut down at the same time.

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