Air purifier

Abstract

The invention relates to the technical field of air purification equipment, and discloses an air purifier. The filter module comprises a filter screen and a filter screen supporting structure, and the filter screen is rotatably arranged in a filter screen mounting space of the filter screen supporting structure; the rotary driving device is mounted at the top of the filter screen supporting structure, is matched with the filter screen and is used for driving the filter screen to rotate; and the dust collection device is used for cleaning the filter screen. The filter screen is arranged to be rotatable, the dust collection device is arranged on one side of the filter screen, 360-degree dead-corner-free cleaning can be conducted on the whole outer surface of the rotating filter screen, the rotation driving device is integrated to the top of the filter screen supporting structure, the rotation driving device does not need to do work against the gravity of the filter screen in the process of driving the filter screen to rotate, and therefore the cleaning efficiency is improved. The problem of insufficient motor torque caused by self gravity of lower end driving is thoroughly solved, the rotating smoothness of the filter screen is remarkably improved, the faults of blockage and even incapability of rotating are avoided, and the cleaning efficiency and the cleaning effect of the filter screen are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of air purification equipment technology, specifically to air purifiers. Background Technology

[0002] Air purifiers, as devices used to improve indoor air quality, typically use fans to drive airflow and adsorb or transform pollutants through internal filters. However, over time, dust and pollutants gradually accumulate on the filters, leading to increased air resistance, decreased purification efficiency, and even bacterial growth.

[0003] Some air handling equipment is equipped with an automatic filter cleaning function, which cleans the filter by driving it to rotate. However, most existing air purifiers drive the lower tray to rotate, which in turn drives the filter on the tray to rotate. The rotation drive device has to work against the gravity of the filter itself, resulting in insufficient motor torque, running sluggishly, and high energy consumption. At the same time, the filter setting is unstable, the rotation is not smooth, and it is very easy to get stuck or even unable to rotate, which seriously affects the filter cleaning effect. Summary of the Invention

[0004] In view of this, the present invention provides an air purifier to solve the problem that in the prior art, the drive device used to drive the filter rotation is located below the filter, which results in insufficient motor torque due to the filter's own gravity, causing the filter to rotate unevenly or even fail to rotate, increasing power consumption, and affecting the filter's cleaning effect.

[0005] This invention provides an air purifier, comprising: The outer casing is equipped with an air inlet and an air outlet; A filter module is disposed on the airflow path between the air inlet and the air outlet. The filter module includes a filter screen and a filter screen support structure. A filter screen installation space is formed within the filter screen support structure, and the filter screen is rotatably disposed within the filter screen installation space. A rotary drive device is installed on top of the filter support structure and cooperates with the filter to drive the filter to rotate; A vacuuming device is installed on the filter support structure and located on one side of the filter for cleaning the filter.

[0006] Beneficial effects: By making the filter screen rotatable and placing the vacuuming device on one side, this application can clean the entire outer surface of the rotating filter screen 360 degrees without dead angles. Moreover, this application subverts the traditional layout of the filter screen being driven by the lower tray, and integrates the rotation drive device into the top of the filter screen support structure. During the process of driving the filter screen to rotate, the rotation drive device does not need to work against the gravity of the filter screen itself, completely solving the problem of insufficient motor torque caused by the gravity of the lower drive. The smoothness of the filter screen rotation is significantly improved, avoiding malfunctions such as jamming or even failure to rotate, and greatly improving the cleaning efficiency and cleaning effect of the filter screen.

[0007] In one optional embodiment, the filter support structure includes: A top support assembly includes a fixedly mounted top frame, and the rotation drive device is mounted on the top frame; A filter support assembly includes a tray and a fixedly mounted bottom frame, the tray rotating relative to the bottom frame, and the filter being disposed above the tray.

[0008] Beneficial effects: By integrating the rotary drive unit into the top frame, the filter screen's own weight is supported by the tray below. The rotary drive unit does not need to work against the filter screen's own weight, significantly improving the smoothness of the filter screen's rotation and avoiding malfunctions such as jamming or even failure to rotate.

[0009] In one alternative embodiment, the rotary drive device includes a drive assembly and a transmission assembly. The transmission assembly includes a first transmission structure rotatably disposed above the top frame. The drive assembly drives the first transmission structure to rotate around a pivot. The filter screen is disposed between the first transmission structure and the tray and rotates synchronously with the first transmission structure.

[0010] Beneficial effects: The first transmission structure acts as a power transmission intermediary between the drive motor and the filter screen, achieving a smooth power transition and avoiding torque fluctuations caused by direct connection between the drive motor and the filter screen. This further improves the smoothness of the filter screen rotation. The filter screen is clamped between the first transmission structure and the tray, forming a bidirectional upper and lower limit. There is no axial movement during rotation. Combined with the coaxial rotation drive of the first transmission structure, it ensures that the filter screen always rotates around the preset axis without any eccentricity or vibration.

[0011] In one alternative embodiment, a first opening is provided on the top frame, the transmission body of the first transmission structure is arranged around the first opening, the outer peripheral surface of the transmission body of the first transmission structure is formed as a transmission part, and the drive component and the transmission part are driven to rotate the first transmission structure.

[0012] Beneficial effects: The first transmission structure is arranged around the first opening, reserving a flow channel for the filtered clean air. Air can smoothly enter the upper purification outlet through the first opening, avoiding the transmission structure from obstructing the air duct and increasing airflow resistance, thus ensuring airflow efficiency. The transmission unit is located on the outer peripheral surface of the transmission body. The drive component cooperates with the transmission unit on the outer peripheral surface, without occupying the space of the central air duct, optimizing the spatial layout of the top frame and making the structure more compact. The transmission cooperation method on the outer peripheral surface increases the lever arm of power transmission, reduces the instantaneous load of the drive motor, further reduces power consumption, and improves the stability of torque transmission.

[0013] In one alternative implementation, the drive component is positioned above the top frame and avoids the first opening.

[0014] Beneficial effects: The drive and transmission components are positioned above the top frame and away from the first opening, preventing obstruction of the airflow path and ensuring unobstructed airflow through the first opening. This maximizes the ventilation volume at the upper purification outlet and optimizes the overall purification efficiency. The integrated drive and transmission components above the top frame, separated from the lower filter, prevent dust accumulation on the filter from contaminating the drive components and extend the lifespan of the rotary drive. The independent modular layout facilitates the individual disassembly and maintenance of the rotary drive, eliminating the need to disassemble the filter or other components, thus reducing maintenance complexity.

[0015] In one alternative embodiment, the vacuuming device includes: A vacuum cleaner housing is fixed to the filter support structure, and a first opening is provided on the side wall of the vacuum cleaner housing; The suction pipe is rotatably disposed within the suction housing. The suction pipe includes at least two sub-pipe segments arranged sequentially along the axial direction. Each sub-pipe segment is provided with a suction port. One end of the suction pipe along the axial direction is provided with a dust outlet. The suction ports on the at least two sub-pipe segments are arranged at different angles in the circumferential direction. There is a gap between the suction pipe and the suction housing. The suction port has a suction position communicating with a first opening and a sealing position that is offset from the first opening. Negative pressure structure, connected to the dust outlet; A drive structure, connected to the suction pipe, is used to drive the suction pipe to rotate so that the suction ports on at least two sub-pipe segments are sequentially connected to the first opening. A sealing element, connected inside the vacuum cleaner housing and rotatably engaged with the vacuum cleaner hose, is used to seal and divide the space into at least two sub-spaces, each sub-space corresponding to a sub-pipe segment.

[0016] Beneficial Effects: By adopting an airflow path design with central air intake and top and bottom air outlets, compared to top and bottom air intake and central air outlets, this effectively avoids the problems of bottom air intake, which easily draws dust, hair, and other foreign objects from the ground directly into the filter, causing filter blockage and even affecting filter performance and lifespan. This reduces the frequency of filter cleaning, extends filter life, and lowers maintenance costs. On the other hand, traditional central air outlet designs often produce a strong direct airflow, which can easily cause user discomfort or even interfere with concentration in quiet scenarios such as sleeping or working. However, the central air intake and top and bottom air outlet design of this application allows purified air to be delivered from the top and bottom simultaneously, forming a "surrounding" airflow purification path indoors. This ensures that purified air is evenly distributed around the user, avoiding direct airflow interference. It is particularly suitable for quiet scenarios such as sleeping and working, achieving "imperceptible purification," significantly improving user comfort, and enhancing the adaptability of the air purifier in various environmental applications to meet the needs of different users in various usage scenarios.

[0017] Furthermore, the suction pipe of the vacuum cleaner employs a design with at least two sub-pipe sections arranged sequentially along the axial direction, allowing at least two suction ports to clean different positions of the filter screen in the circumferential direction. The drive structure rotates the suction pipe, causing the suction ports on at least two sub-pipe sections to sequentially connect with the first opening. This allows different suction ports to sequentially reach the suction positions connected to the first opening, enabling them to enter the working state sequentially. Other suction ports are in sealed positions offset from the first opening. The suction ports in the suction positions generate negative pressure under the negative pressure of the negative pressure structure, which can suck up and clean dust and contaminants on the surface of the filter screen. Due to the sealing element, the space between the suction pipe and the vacuum housing is sealed and separated, preventing gas from flowing within the space and avoiding gas flow between suction ports not in suction positions. This ensures that most gas can only enter from the suction ports in suction positions and flow out from the dust outlet, preventing the sealed and inactive suction ports from affecting the suction ports in suction positions and ensuring the suction effect of the suction pipe.

[0018] In one alternative embodiment, the sealing element is a sleeve with a communication port that communicates with the first opening; there are at least two sleeves, and one sleeve is sealed around the outer periphery of each sub-pipe segment.

[0019] Beneficial effects: The connecting port is connected to the first opening, ensuring that when the suction port is rotated to the suction position, it can communicate with the filter screen surface through the connecting port and the first opening, so as to achieve better removal of dust and pollutants from the filter screen surface; and the sleeve structure is simple, easy to connect, and can also have a good sealing effect.

[0020] In one alternative embodiment, the sub-pipe section has sealing flanges protruding from both ends in the axial direction, and the sealing flanges are rotatably engaged with the inner wall of the sleeve.

[0021] Beneficial effects: By setting the sealing flange, dust and gas can be prevented from running around randomly between the sub-tube sections along the axial direction, and the contact area between the sleeve and the sub-tube sections can be reduced, thus reducing friction and ensuring the smooth rotation and stability of the suction pipe.

[0022] In one optional embodiment, the outer peripheral wall of the sub-pipe section is further provided with a rib, which extends in the axial direction and is connected to two sealing flanges at both ends. The rib is rotatably engaged with the inner wall of the sleeve.

[0023] Beneficial effects: By setting the ribs, the strength of the sub-tube section can be increased, dust and gas can be prevented from flowing in the interval space along the circumferential direction, and the contact area between the sleeve and the sub-tube section can be reduced, thus reducing friction and ensuring the smooth rotation and stability of the suction pipe.

[0024] In one alternative embodiment, the ribs are at least two, and the at least two ribs are distributed at circumferential intervals along the sleeve.

[0025] Beneficial effects: The sleeve has at least two raised ribs, which are distributed at intervals along the circumference of the sleeve, and can provide better limiting and sealing effects in the circumferential direction.

[0026] In one alternative embodiment, the air inlet is located in the middle of the housing; The air outlet includes an upper air outlet located at the top of the housing and a lower air outlet located at the bottom of the housing.

[0027] Beneficial Effects: This application adopts an airflow path design with central air intake and top and bottom air outlets. Compared to the purification method of top and bottom air intake and central air outlet, it effectively avoids the problem of bottom air intake, which easily draws dust, hair, and other foreign objects from the ground directly into the filter, causing filter blockage and even affecting filter performance and lifespan. This reduces the frequency of filter cleaning, extends filter life, and lowers maintenance costs. On the other hand, traditional central air outlet designs often produce a strong direct airflow sensation, which can easily cause user discomfort or even interfere with concentration in quiet scenarios such as sleeping or working. However, the central air intake and top and bottom air outlet design of this application allows purified air to be delivered from the top and bottom simultaneously, forming a "surround" airflow purification path in the room. This ensures that purified air is evenly distributed around the user, completely eliminating direct airflow interference. It is particularly suitable for quiet scenarios such as sleeping and working, achieving "imperceptible purification," significantly improving user comfort, and enhancing the adaptability of the air purifier in various environmental applications to meet the needs of different users in various usage scenarios.

[0028] In one alternative implementation, the air purifier further includes: An upper fan assembly is located at the top of the housing and is used to drive external air to flow from the air inlet to the upper air outlet. The lower fan assembly is located at the top of the housing and is used to drive external air to flow from the air inlet to the lower air outlet. The filter module is located between the upper fan assembly and the lower fan assembly, and the top and bottom of the filter module are respectively formed with an upper purification outlet and a lower purification outlet. The upper fan assembly is disposed between the upper purification outlet and the upper air outlet, and the lower fan assembly is disposed between the lower purification outlet and the lower air outlet.

[0029] Beneficial effects: Only one filter module needs to be installed at the air inlet, compared to the existing system that requires two independent filter modules for top and bottom air inlets. This simplifies the overall structure, production and assembly process, reduces material costs, and lowers the complexity of filter maintenance. Furthermore, the fan assembly and the lower fan assembly form two completely independent drive systems that can be controlled and adjusted separately, enabling multiple operating modes, such as sleep mode using only the top air outlet, and powerful mode using both top and bottom air outlets simultaneously. This greatly increases the product's functional versatility and adaptability to various scenarios.

[0030] In one optional implementation, the air purifier further includes: The deodorization module is located at the lower air outlet. The deodorization module includes a plasma generator, which can generate plasma by discharge to decompose odors in the air.

[0031] Beneficial effects: By using a plasma generator installed at the lower air outlet, high-density plasma can be generated. Through discharge, harmful gases are catalytically degraded, thereby deeply decomposing residual odors, formaldehyde, TVOC and other gaseous pollutants in the clean air to be discharged, completely eliminating odors. This makes up for the shortcomings of traditional filters, which are mainly effective against particulate matter and have limited efficiency in removing gaseous pollutants, thus expanding the purification capabilities of air purifiers. Attached Figure Description

[0032] 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.

[0033] Figure 1 A schematic diagram of the external structure of the air purifier in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the air purifier in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the air purifier after the filter has been removed in an embodiment of the present invention; Figure 4 This is a schematic diagram of the airflow direction of the air purifier in an embodiment of the present invention; Figure 5 This is an exploded view of the air purifier in an embodiment of the present invention; Figure 6 This is a schematic diagram of the air purifier after removing the outer casing in an embodiment of the present invention; Figure 7 for Figure 6 A schematic diagram of the structure after removing the filter screen; Figure 8 This is an exploded view of the lower fan assembly, the bottom light assembly, and the support base in an embodiment of the present invention; Figure 9 This is an exploded view of the upper fan assembly in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of a filtering module according to an embodiment of the present invention; Figure 11 This is a cross-sectional view of a filtering module according to an embodiment of the present invention; Figure 12 This is a cross-sectional view of a filtering module according to an embodiment of the present invention; Figure 13 This is a partially enlarged schematic diagram of a filter screen according to an embodiment of the present invention; Figure 14 This is a partial cross-sectional view of a filtering module according to an embodiment of the present invention; Figure 15 This is an exploded view of a top support component according to an embodiment of the present invention; Figure 16 This is a partial structural diagram of a filter screen according to an embodiment of the present invention; Figure 17 This is a schematic diagram of a first transmission structure according to an embodiment of the present invention; Figure 18 This is an exploded view of a filter support assembly according to an embodiment of the present invention; Figure 19 This is an exploded view of a filter support assembly according to an embodiment of the present invention; Figure 20 This is a partial structural schematic diagram of a filter support assembly according to an embodiment of the present invention; Figure 21 for Figure 20 A magnified view of a portion of the image; Figure 22This is a partial cross-sectional view of a filter support assembly according to an embodiment of the present invention; Figure 23 for Figure 22 A magnified view of a portion of the image; Figure 24 This is a partial cross-sectional view of a filter support assembly according to an embodiment of the present invention; Figure 25 for Figure 24 A magnified view of a portion of the image; Figure 26 This is a partial cross-sectional view of a filter support assembly according to an embodiment of the present invention; Figure 27 This is a partial cross-sectional view of the filter support assembly and the filter mesh in cooperation according to an embodiment of the present invention; Figure 28 for Figure 27 A magnified view of a portion of the image; Figure 29 This is a partial cross-sectional view of the filter support assembly and the filter mesh in cooperation according to an embodiment of the present invention; Figure 30 for Figure 29 A magnified view of a portion of the image; Figure 31 This is a schematic diagram of the structure of a rotary switch according to an embodiment of the present invention; Figure 32 This is a schematic diagram of the structure of a lever according to an embodiment of the present invention; Figure 33 This is a schematic diagram of the structure of a lever according to an embodiment of the present invention; Figure 34 This is an exploded view of the installation of a vacuum cleaner device according to an embodiment of the present invention; Figure 35 for Figure 34 A magnified view of part A in the diagram; Figure 36 for Figure 34 A magnified view of part B in the diagram; Figure 37 This is a schematic diagram of the structure of the first pressure plate of a dust collection device according to an embodiment of the present invention; Figure 38 for Figure 37 A magnified view of part of C; Figure 39 This is a schematic diagram of the structure of a cleaning brush of a vacuum cleaner according to an embodiment of the present invention; Figure 40 for Figure 39 A magnified view of part of D; Figure 41 This is a schematic diagram of the structure of the suction pipe of a vacuum cleaner according to an embodiment of the present invention; Figure 42 for Figure 41A magnified view of part of E in the diagram; Figure 43 This is a schematic diagram of the axial direction of a dust collection device according to an embodiment of the present invention; Figure 44 This is a schematic diagram of a sealing element of a dust collection device according to an embodiment of the present invention; Figure 45 This is a schematic diagram of the structure of a vacuum cleaner according to an embodiment of the present invention; Figure 46 This is a partial structural diagram of an air purifier according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures: 10. Outer casing; 100. Air inlet; 101. Upper air outlet; 102. Lower air outlet; 104. Guide hole; 11. Air inlet grille; 12. Air outlet grille; 13. Outer cover plate; 14. Formaldehyde sensor; 21. Upper fan assembly; 211. Second fan; 2111. Second motor; 2112. Second fan blade; 212. Upper air duct; 213. Second support frame; 214. Negative ion generator; 22. Downstream fan assembly; 221. First fan; 2211. First motor; 2212. First fan blade; 222. First bracket; 2220. Flow opening; 2221. First slot; 30. Filtering module; 31. Filter screen; 310. Second brush body; 311. Filter cotton; 312. Top end cap; 3121. Insertion hole; 31211. First limiting rib; 3122. End cap body; 31221. Positioning ring; 3123. Reinforcing rib; 32. Top support component; 321. Top frame; 3211. First opening; 3212. Step surface; 322. Rotary drive device; 3221. First transmission structure; 32211. First mounting part; 32212. Insertion protrusion; 322121. Second limiting rib; 32213. Transmission body; 322131. First transmission gear; 32214. Connecting rib; 3222. Drive gear; 3223. Power motor; 323. Cover; 3231. Rotating shaft; 3232. Extension rib; 3230. Upper purification outlet; 3233. Clearance opening; 324. Mesh cover; 325. Ball bearing structure; 3201, First installation space; 33. Filter support assembly; 331. Bottom frame; 3311. Lower purification outlet; 3312. Second mounting part; 33121. Guide rail structure; 3313. First protrusion; 33131. First driving slope; 332. Lifting module; 3321, Rotary switch; 33212, Second protrusion; 332121, Second drive ramp; 33213, Long sliding hole; 3322, slider structure; 33221, second groove; 3323, lever; 33231, pin; 33232, limit groove; 333, pallet; 3331, first flange; 3332, second flange; 334. Ball bearing; 336. Top cover; 3361. Second opening; 3301, First receiving space; 3302, Second receiving space; 32335, Sealing structure; 34. Intermediate support frame; 3401. Guide slope; 3402. Guide section; 3403. Guide mating section; 40. Vacuum cleaning device; 400. Vacuum cleaning base; 41. Vacuum cleaner housing; 411. First opening; 412. Second snap-fit ​​part; 413. First housing; 414. Second housing; 42. Suction pipe; 421. Suction port; 422. Dust outlet; 423. Sealing flange; 424. Rib; 43. Negative pressure structure; 431. Dust collection box; 432. Air pump; 433. First connecting pipe; 434. Second connecting pipe; 44. First pressure plate; 441. Second opening; 442. First snap-fit ​​part; 45. Cleaning brush; 451. Cleaning bracket; 452. First brush body; 453. Third opening; 454. Limiting rib; 455. Second limiting post; 46. ​​Drive structure; 461. Elastic element; 462. Drive motor; 463. Transmission unit; 47. Sealing element; 471. Communicating port; 472. First connecting part; 473. Limiting sealing part; 4731. First sealing strip; 4732. Second sealing strip; 48. First fixing plate; 49. Second fixing plate; 491. Connecting joint; 50. Odor removal module; 51. Plasma generator; 511. Mounting bracket; 512. Electrode structure 52. Metal mesh cover; 53. Ozone reduction mesh; 60. Ultraviolet sterilization module; 61. Ultraviolet lamp; 62. Lamp holder; 70. Display module; 80. Support base; 90. Bottom light assembly; 91. Light strip bracket; 92. Bottom ambient light strip. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Furthermore, 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.

[0039] The following is combined Figures 1 to 46 The following describes embodiments of the present invention.

[0040] According to embodiments of the present invention, in one aspect, the present invention provides an air purifier, such as... Figures 1 to 8As shown, the device includes a housing 10, a filter module 30, a rotary drive device 322, and a dust collection device 40. The housing 10 has an air inlet 100 and an air outlet. Preferably, the air inlet 100 is located in the middle of the housing 10. The air outlet includes an upper air outlet 101 located at the top of the housing 10 and a lower air outlet 102 located at the bottom of the housing 10. The filter module 30 is disposed in the airflow path between the air inlet 100 and the air outlet. Preferably, the filter module 30 is located at the air inlet 100. The filter module 30 includes a filter screen 31 and a filter screen support structure. A filter screen mounting space is formed within the filter screen support structure, and the filter screen 31 is rotatably disposed within the filter screen mounting space. A rotary drive device 322 is mounted on the top of the filter screen support structure and cooperates with the filter screen 31 to drive the filter screen 31 to rotate. Preferably, the rotary drive device 322 is located above the filter screen 31. A dust collection device 40 is mounted on the filter screen support structure and located on one side of the filter screen 31 for cleaning the filter screen 31.

[0041] This application overturns the traditional layout of the filter screen 31 being driven by the lower tray 333, and integrates the rotary drive device 322 on the top of the filter screen support structure. During the rotation of the filter screen 31, the rotary drive device 322 does not need to do work against the gravity of the filter screen 31 itself, which completely solves the problem of insufficient motor torque caused by the gravity of the lower drive. The smoothness of the rotation of the filter screen 31 is significantly improved, avoiding the failure of jamming or even failure to rotate, and greatly improving the cleaning efficiency and cleaning effect of the filter screen 31.

[0042] The following is in conjunction with the appendix Figures 10 to 33 This embodiment describes the specific structure and working principle of the filter support structure, the rotary drive device 322, the filter 31, and other components.

[0043] In some embodiments, the filter support structure includes a top support assembly 32 and a filter support assembly 33, with the filter support assembly 33 located below the top support assembly 32. A filter 31 is disposed between the top support assembly 32 and the filter support assembly 33. Preferably, the filter 31 is cylindrical. The top support assembly 32 includes a fixedly disposed top frame 321, and the rotation drive device 322 is disposed on the top frame 321. The filter support assembly 33 includes a tray 333 and a fixedly disposed bottom frame 331. The tray 333 rotates relative to the bottom frame 331, and the filter 31 is disposed above the tray 333.

[0044] This application decouples the self-weight bearing and rotational drive task of the filter screen 31 into two independent functional components. The tray 333 of the filter screen support component 33 serves as a dedicated self-weight bearing structure, directly bearing the entire weight load of the cylindrical filter screen 31. The self-weight of the filter screen 31 is transferred to the bottom frame 331 through the tray 333, and finally, the outer shell 10 achieves stable bearing. The rotational drive device 322 of the top support component 32 only undertakes the single task of "providing rotational torque" and does not need to work against the self-weight of the filter screen 31. Structurally, the connection between the self-weight of the filter screen 31 and the drive torque is severed, completely avoiding the structural contradiction of "rotational drive device 322 both bearing weight and transmitting force" in the traditional lower-end drive mode, and creating a low-load working environment for the rotational drive device 322.

[0045] The rotary drive unit 322 does not need to counteract the gravity of the filter screen 31; it only needs to output rotational torque to drive the filter screen 31. This avoids technical malfunctions such as jamming, uneven speed, and inability to rotate caused by the gravity load of traditional bottom-drive modes. It can be used to drive large-diameter, high-density high-efficiency filter screens 31, solving the problem of insufficient motor torque and improving operational smoothness. It also extends the lifespan of the rotary drive unit 322 and reduces energy consumption.

[0046] Meanwhile, the tray 333 adopts a "rotatable setting" structural design, which is connected to the bottom frame 331 through ball bearings 334 or sliding bearings, so that the tray 333 can rotate synchronously with the filter screen 31, which can realize the function of bearing its own weight without hindering the rotation of the filter screen 31, and at the same time, it does not generate rotational resistance, realizing the coordinated work of the tray 333 in bearing and following.

[0047] The filter module 30 adopts a modular design consisting of a top support component 32, a filter support component 33, and a filter 31. The top support component 32 integrates the driving function and the function of limiting the upper airflow duct 212, while the filter support component 33 integrates the load-bearing function and the function of limiting the lower airflow duct. The filter 31 is placed between the two components. This structure makes the functional boundaries of each component clear. During assembly, the two main components can be fixed in the housing 10 first, and then the filter 31 can be installed, simplifying the assembly process. During maintenance, any module can be disassembled and assembled individually, effectively simplifying the assembly process and significantly reducing the difficulty of maintenance.

[0048] Furthermore, the top-driven layout provides more space below the bottom frame 331 inside the shell 10, enabling structural avoidance.

[0049] In summary, this application overturns the traditional layout where the filter 31 is driven by the lower tray 333. Instead, it integrates the rotary drive device 322 into the top frame 321, and the weight of the filter 31 is supported by the lower tray 333. The rotary drive device 322 does not need to work against the weight of the filter 31, thus completely solving the problem of insufficient motor torque caused by the weight of the lower drive. The smoothness of the rotation of the filter 31 is significantly improved, avoiding malfunctions such as jamming or even failure to rotate.

[0050] In one embodiment, such as Figure 11-12 and Figures 14-15 As shown, the rotary drive device 322 includes a power motor 3223 and a first transmission structure 3221 rotatably disposed above the top frame 321. The power motor 3223 is used to drive the first transmission structure 3221 to rotate around the rotating shaft 3231. The filter screen 31 is disposed between the first transmission structure 3221 and the tray 333 and rotates synchronously with the first transmission structure 3221.

[0051] The first transmission structure 3221 serves as a dedicated power intermediary between the power motor 3223 and the filter screen 31. Its core function is to achieve a smooth transition of torque and a change in direction. The rotational power output by the power motor 3223 first acts directly or indirectly on the first transmission structure 3221, and the power is transmitted to the filter screen 31 through the transmission cooperation between the first transmission structure 3221 and the filter screen 31.

[0052] The first transmission structure 3221 and the filter screen 31 can be coupled through insertion, snap-fit, or contact friction to transmit torque. The rigidity of the first transmission structure 3221 can be used to attenuate the torque fluctuations of the power motor 3223, preventing instantaneous impact loads from directly acting on the filter screen 31. Simultaneously, the first transmission structure 3221 rotates around the shaft 3231 of the top frame 321, which provides a fixed center of rotation, ensuring that the axis of the first transmission structure 3221 always coincides with the axis of the filter screen 31 during power transmission, forming a "coaxial transmission" system and eliminating the influence of radial force on power transmission efficiency.

[0053] The filter screen 31 is clamped between the first transmission structure 3221 and the tray 333, forming a two-way constraint of upper drive and lower load. The lower side of the first transmission structure 3221 and the upper side of the tray 333 limit the filter screen 31 on both sides of the axial direction, ensuring that the filter screen 31 has no axial movement and can achieve synchronous rotation.

[0054] The first transmission structure 3221 serves as a power transmission intermediary between the power motor 3223 and the filter screen 31, achieving a smooth power transition and avoiding torque fluctuations caused by the direct connection between the power motor 3223 and the filter screen 31. This further improves the smoothness of the filter screen 31's rotation. The filter screen 31 is clamped between the first transmission structure 3221 and the tray 333, forming a bidirectional upper and lower limit. There is no axial movement during rotation. In conjunction with the coaxial rotation drive of the first transmission structure 3221, it ensures that the filter screen 31 always rotates around the preset axis without any eccentricity or vibration.

[0055] In some other embodiments, the first transmission structure 3221 may also be formed directly from the drive shaft of the power motor 3223, which is not limited here.

[0056] In one embodiment, such as Figure 11 , Figure 12 and Figures 14-15 As shown, a first opening 3211 is provided on the top frame 321. The transmission body 32213 of the first transmission structure 3221 is arranged around the first opening 3211. The outer peripheral surface of the transmission body 32213 of the first transmission structure 3221 is formed as a transmission part 463. The power motor 3223 and the transmission part 463 drive the first transmission structure 3221 to rotate.

[0057] The first transmission structure 3221 is designed as a ring-shaped or frame-like body surrounding the first opening 3211, so that the central area of ​​the first opening 3211 forms a continuous airflow channel that minimizes mechanical obstruction. This arrangement ensures that the air purified by the filter 31 can pass directly through the first opening 3211 and flow unobstructed to the upper purification outlet 3230 connected to the upper air outlet 101, thereby minimizing airflow resistance and wind loss.

[0058] The transmission part 463 is directly formed on the outer peripheral surface of the first transmission structure 3221. The power motor 3223 drives the first transmission structure 3221 to rotate through meshing with the outer peripheral transmission part 463 or through friction transmission with a pulley. This peripheral drive design substantially increases the lever arm of the driving force, which reduces the instantaneous force required by the power motor 3223 to output the same torque, thereby reducing the requirement for the peak torque of the motor and improving the mechanical efficiency and stability of the transmission system.

[0059] The first transmission structure 3221 is arranged around the first opening 3211, reserving a flow channel for the filtered clean air. Air can smoothly enter the upper purification outlet 3230 through the first opening 3211, avoiding the transmission structure from obstructing the air duct and increasing airflow resistance, thus ensuring airflow efficiency. The transmission part 463 is located on the outer peripheral surface of the transmission body 32213. The power motor 3223 cooperates with the transmission part 463 on the outer peripheral surface, without occupying the space of the central air duct, optimizing the spatial layout of the top frame 321 and making the structure more compact. The transmission cooperation method on the outer peripheral surface increases the lever arm of power transmission, reduces the instantaneous load of the power motor 3223, further reduces power consumption, and improves the stability of torque transmission.

[0060] In other embodiments, the transmission part 463 may also be formed on other locations such as the inner circumferential surface of the transmission body 32213, which is not limited here.

[0061] In one embodiment, such as Figure 15 As shown, the power motor 3223 and the transmission assembly connecting the power motor 3223 and the transmission part 463 are located above the top frame 321 and are positioned to avoid the first opening 3211.

[0062] The power motor 3223 and its transmission assembly with the transmission unit 463 are integrally positioned above the top frame 321, and are designed to actively avoid the central area where the first opening 3211 is located in terms of spatial layout. This enables vertical spatial layering of functional modules. The power motor 3223 that generates power and the transmission assembly that converts torque are physically isolated vertically from the space below the top frame 321, and are physically separated horizontally from the first opening 3211, which serves as an airflow channel.

[0063] The transmission component can be a reduction gear set, a drive shaft, a pulley, or other structures, and is not limited thereto.

[0064] The motor 3223 and transmission assembly are positioned above the top frame 321 and away from the first opening 3211, preventing obstruction of the airflow channel and avoiding placing the rotary drive 322 in the airflow path. This ensures unobstructed airflow through the first opening 3211, maximizing the ventilation volume of the upper purification outlet 3230 and optimizing the overall purification efficiency. The motor 3223 and transmission assembly are integrated above the top frame 321, separated from the lower filter 31, preventing dust accumulation on the filter 31 from contaminating the drive components and extending the service life of the rotary drive 322. This independent modular layout facilitates the individual disassembly and maintenance of the rotary drive 322 without disassembling the filter 31 or other components, reducing maintenance difficulty.

[0065] In one embodiment, such as Figure 14 , Figure 15and Figure 17 As shown, the transmission part 463 is formed as a first transmission gear 322131, and the rotary drive device 322 also includes a second transmission structure, which is formed as a drive gear 3222 that meshes with the first transmission gear 322131.

[0066] The transmission unit 463 is designed as the first transmission gear 322131, and a second transmission structure, namely the drive gear 3222, is added to the rotary drive device 322 to mesh with it, thus forming a compact gear meshing transmission system.

[0067] Power is transmitted through a first transmission gear 322131 and a drive gear 3222, relying on rigid meshing between the tooth surfaces to replace the friction dependence or flexible connection of other transmission methods. This meshing method eliminates slippage and speed ratio fluctuations caused by elastic deformation, and can accurately convert the rotational motion of the power motor 3223 into the rotational motion of the first transmission gear 322131 and the filter screen 31 connected thereto.

[0068] The torque output by the power motor 3223 acts directly on the tooth surface of the first transmission gear 322131 through the drive gear 3222. The gear meshing efficiently converts the driving force of the motor shaft into the tangential force that drives the filter screen 31 to rotate. The power transmission path is short, the intermediate loss is extremely low, and the transmission efficiency is high.

[0069] The gear transmission method eliminates slippage losses in power transmission, resulting in higher efficiency compared to belt drives and other similar methods. This ensures that the output torque of the motor 3223 is effectively applied to the filter screen 31. The rigid connection of the gear mesh allows for precise control of the rotational speed of the first transmission structure 3221, ensuring uniform rotation of the filter screen 31 and guaranteeing consistent filtration. This prevents incomplete filtration caused by speed fluctuations. The gear transmission also boasts strong load-bearing capacity, making it suitable for large-diameter, high-density filters 31. Even if dust accumulation on the filter screen increases rotational resistance, stable rotation is maintained, preventing motor overload damage.

[0070] In one embodiment, such as Figure 15 As shown, the tooth ratio between the drive gear 3222 and the first transmission gear 322131 is no greater than 1 / 2. That is, the number of teeth of the drive gear 3222 is at most half the number of teeth of the first transmission gear 322131. By constructing a gear pair with a significant reduction ratio, speed reduction and torque increase are achieved.

[0071] In gear transmission, the gear ratio between the driving gear 3222 and the driven gear 322131 directly determines the reduction ratio of the system. Limiting the gear ratio to no more than 1 / 2 means the reduction ratio must be at least 2. The torque output by the motor 3223, after passing through this gear pair, can theoretically be amplified by at least double, thus converting the high-speed, low-torque output of the motor into the low-speed, high-torque output required to drive the filter 31.

[0072] This gear ratio setting also takes into account the space constraints of arranging the drive gear 3222. A smaller drive gear 3222 has a smaller radial dimension, which helps it to be arranged flexibly in the limited space above the top frame 321, better avoids the central first opening 3211 air duct, and achieves a compact direct or close drive with the power motor 3223, reducing intermediate links.

[0073] A gear ratio of less than or equal to 1 / 2 is a preferred range. In actual design, it can be finely selected based on the specific weight, moment of inertia, and target speed of the filter 31. For example, a larger reduction ratio such as 1 / 3 or 1 / 4 can be used to accommodate heavier loads. This achieves a reduction and torque increase effect. The high-speed, low-torque power output by the motor 3223 is converted into low-speed, high-torque power after gear meshing and transmitted to the filter 31, effectively improving torque output capability and completely solving the problem of uneven or non-rotating operation caused by the load on the filter 31. The reduction transmission can reduce the rotational speed of the filter 31, avoiding deformation of the filter 31 due to centrifugal force generated by high-speed rotation, while also reducing rotational noise and improving the user experience. A reasonable gear ratio matching allows the motor 3223 to operate in the efficient speed range, reducing useless power consumption of the motor and further reducing the overall energy consumption of the machine. At the same time, it reduces the size of the drive gear 3222, avoiding it occupying too much space and affecting the internal structural layout of the air purifier.

[0074] In one embodiment, such as Figure 15 As shown, the drive shaft of the power motor 3223 is coaxially and fixedly connected to the drive gear 3222. This achieves extreme simplification and minimization of the power transmission path.

[0075] The output shaft of the power motor 3223 directly serves as the rotating shaft 3231 of the drive gear 3222, and the two form a rigid whole that rotates around a common axis. This eliminates intermediate links such as couplings, transition shafts, and additional bearing supports that may exist in traditional designs, and realizes direct torque transmission from the motor rotor to the drive gear 3222 with zero distance and no intermediate links, minimizing the connection points that may cause torsional elastic deformation, backlash, or energy loss.

[0076] The drive shaft and drive gear 3222 are coaxially fixed, ensuring that the power transmission path is along the axial direction, without generating eccentric torque. This avoids tooth surface wear caused by lateral forces during gear meshing, extending gear life. The coaxial connection reduces intermediate links in power transmission, lowers torque loss, improves transmission efficiency, and simplifies the assembly structure, reducing production and assembly difficulty. The coaxial fixed structure has strong stability; during long-term, high-frequency operation, the gear meshing clearance will not change due to component offset, maintaining a stable transmission ratio and torque output. The power motor 3223 and the first transmission gear 322131 are only connected through the drive gear 3222, simplifying the structure of the rotary drive device 322, reducing production and design costs, and the space cost of arranging the rotary drive device 322.

[0077] In some embodiments, the output shaft end of the power motor 3223 is directly machined with gear teeth, achieving true motor-gear integration. In other embodiments, the drive shaft of the power motor 3223 and the drive gear 3222 are splined to transmit greater torque and ensure circumferential positioning between them.

[0078] In one embodiment, such as Figure 14 , Figure 15 and Figure 17 As shown, a stepped surface 3212 is formed at the first opening 3211. The bottom surface of the first transmission structure 3221 is fitted into the first opening 3211 with the stepped surface 3212. At least a part of the first transmission structure 3221 protrudes from the upper surface of the top frame 321, and the transmission part 463 is formed on at least a part of the outer peripheral surface.

[0079] By setting a stepped surface 3212 at the first opening 3211 and fitting the bottom surface of the first transmission structure 3221 into the stepped surface 3212, while making at least a portion of it protrude from the upper surface of the top frame 321, a composite installation structure integrating precise positioning, stable load bearing and functional optimization is formed.

[0080] The stepped surface 3212 forms an annular support plane perpendicular to the axial direction and a circumferential limiting wall connected to it. The bottom surface of the first transmission structure 3221 is in contact with the stepped surface 3212, achieving precise positioning of its axial height. The stepped surface 3212 directly bears the load on one side of the axial direction. At the same time, its sidewall cooperates with the circumferential limiting wall of the stepped surface 3212, achieving precise radial constraint of the rotation center.

[0081] By making a portion of the first transmission structure 3221, typically its upper part, protrude from the upper surface of the top frame 321, and shaping its outer periphery into the transmission part 463 on the protruding portion, the key functional area for realizing the transmission is essentially raised above the operating plane of the top frame 321. This design achieves axial separation between the load-bearing interface, i.e., the contact area between the bottom surface and the stepped surface 3212, and the transmission working interface; placing the transmission working area in a relatively open and easily accessible space, rather than in a hidden location recessed thereunder.

[0082] The first transmission structure 3221 is embedded in the first opening 3211 through the stepped surface 3212, achieving radial limiting and ensuring that its rotation center coincides with the axis of the filter screen 31, avoiding vibration and noise caused by eccentric rotation and improving rotation smoothness. The transmission part 463 is located on the outer peripheral surface of the protruding upper surface of the top frame 321, so that the meshing part of the power motor 3223 and the gear is in the open space above the top frame 321, which facilitates alignment during assembly and subsequent cleaning, lubrication and maintenance. The embedded fit structure design makes the connection between the first transmission structure 3221 and the top frame 321 more compact, improves the rigidity of the overall structure, and resists vibration and impact during operation.

[0083] In one embodiment, such as Figures 10-12 As shown, the filter support assembly 33 also includes a lifting module 332. The tray 333 is rotatably disposed above the lifting module 332. The lifting module 332 drives the filter 31 to move along the axial direction through the tray 333.

[0084] This application enables the filter module 30 to dynamically switch between a first state and a second state through the active deformation of the mechanical structure, adapting to the installation and maintenance conditions and stable working conditions of the filter screen 31 respectively.

[0085] The first state is the installation or maintenance state of the filter module 30, and the second state is the working and locked state of the filter module 30. In the first state, by controlling the tray 333 to be at a lower first height, an axial gap sufficient for the filter screen 31 to move freely horizontally is created between the tray 333 and the first transmission structure 3221 above, creating physical conditions for the unobstructed placement and removal of the filter screen 31.

[0086] In the first state, the user's operation of replacing filter 31 can be simplified to a simple "horizontal pick-up and drop", which improves the convenience of filter 31 and enhances the user experience.

[0087] The switching between states is accomplished by the lifting module 332 as both the power source and the actuator. When it is necessary to enter the working state, the lifting module 332 outputs power to precisely lift the tray 333 from the first height to a higher second height. This lifting action actively eliminates the aforementioned axial clearance and causes the filter screen 31 to be synchronously limited by the upper first transmission structure 3221 and the lower tray 333, thereby clamping it between the two.

[0088] In the second state, the filter 31 is axially limited, which effectively prevents axial movement, radial eccentricity, or circumferential slippage that may occur during high-speed rotation of the filter 31. This ensures smooth and uniform rotation of the filter 31, significantly reducing operating noise and overall machine vibration caused by vibration and eccentricity, while also ensuring the uniformity of airflow through the filter 31 and improving the consistency of purification effect.

[0089] In summary, the filter module 30 employs a dual-state switching design, balancing the ease of filter replacement 31 with operational stability. In the first state, the tray 333 is in a low position, allowing the filter 31 to move freely horizontally. This enables quick and easy placement and removal without disassembling other components, completely resolving the cumbersome replacement process of traditional filters 31. In the second state, the tray 333 rises, clamping the filter 31 between the first transmission structure 3221 and the tray 333, forming a stable clamping position. This prevents displacement and eccentricity during filter 31 rotation, ensuring smooth operation. The clamped filter 31 also provides more stable rotational drive force transmission, preventing power loss and noise caused by filter 31 loosening. The dual-state switching is driven by the lifting module 332, eliminating the need for manual pressing or locking, simplifying operation and significantly improving product usability.

[0090] Since the filter screen 31 can rise to cooperate with the first transmission structure 3221 of the top support component 32, the rotary drive device 322 can be set on the top support component 32 on the upper side of the filter module 30, so as to achieve a better driving effect that is not affected by the gravity of the filter screen 31 itself.

[0091] The lifting module 332 drives the tray 333 to move the filter screen 31 axially, enabling automatic coordination between the filter screen 31 and the rotary drive device 322. This ensures convenient operation and guarantees that the filter screen 31 rotates under the drive of the rotary drive device 322. The axial lifting function adaptively adjusts the distance between the tray 333 and the first transmission structure 3221, ensuring that both limit the filter screen 31 axially. The filter screen 31 is clamped between the first transmission structure 3221 and the tray 333, forming a bidirectional upper and lower limit. There is no axial movement during rotation. Combined with the coaxial rotation drive of the first transmission structure 3221, this ensures that the filter screen 31 always rotates around a preset axis without any eccentricity or vibration.

[0092] In one embodiment, such as Figures 10-12 , Figure 14 and Figure 15 As shown, the top support assembly 32 also includes a cover 323, which is located above the top frame 321 and defines a first installation space 3201 between the cover 323 and the top frame 321. The first transmission structure 3221 is located in the first installation space 3201.

[0093] The cover 323 is positioned above the top frame 321 and, together with the top frame 321, encloses and defines a closed or semi-closed first mounting space 3201 for accommodating the first transmission structure 3221. The top drive core, i.e., the first transmission structure 3221, is partially encapsulated within the first mounting space 3201 formed by the top frame 321 and the cover 323. This achieves physical enclosure and isolation of the precision transmission component 463, clearly separating it from the external environment and other functional areas within the equipment.

[0094] The cover 323 and the top frame 321 are fixedly connected by screws, clips, etc., forming a rigid composite structure. This structure not only provides the first transmission structure 3221 with an upper constraint and positioning reference in addition to the top support frame supported at the bottom, preventing it from axial movement or being disturbed by external forces, but also significantly enhances the structural rigidity and integrity of the entire top assembly, enabling it to better resist operational vibration and external impact.

[0095] The first installation space 3201 formed by the cover 323 and the top frame 321 houses the first transmission structure 3221, isolating it from external dust, hair, and other foreign objects, preventing foreign objects from getting stuck in the gear meshing or transmission mating surfaces, and extending the service life of the rotary drive device 322. The cover 323, positioned on the upper side, limits the first transmission structure 3221, ensuring the stability of the first transmission structure 3221 and improving the overall structure's impact resistance. Even if the purifier is slightly shaken or moved, the internal transmission components 463 will not shift or be damaged.

[0096] In one embodiment, such as Figure 15 As shown, the cover 323 defines the upper purification outlet 3230, and a mesh cover 324 is provided above the cover 323, which covers the upper purification outlet 3230.

[0097] The cover 323 directly forms the upper purification outlet 3230, and a mesh cover 324 is further provided above the cover 323 to cover the upper purification outlet 3230. The mesh cover 324, as a component with regular pores, covers the entire upper purification outlet 3230. It acts as a selective filtration barrier located in the air outlet path. As the most visible part at the top of the device, the mesh cover 324 physically prevents the user from contacting the internal structure of the filter module 30.

[0098] The mesh cover 324 covers the purification outlet 3230, effectively preventing foreign objects from falling into the internal space of the filter module 30, further enhancing the protection of the filter module 30, and preventing users from accidentally touching internal operating parts during use, thus improving safety. The mesh cover 324 also straightens the discharged clean airflow, dispersing the concentrated airflow into a uniform diffused airflow, accelerating the mixing speed of clean air and indoor air, and improving purification efficiency.

[0099] In one embodiment, such as Figure 11 , Figure 12 and Figure 14 As shown, a rotating shaft 3231 is located at the center of the cover 323. A first transmission structure 3221 cooperates with the rotating shaft 3231 to rotate around the rotating shaft 3231. An extension rib 3232 connects the rotating shaft 3231 and the cover 323. The rotating shaft 3231 is located at the center of the cover 323. The first transmission structure 3221 achieves rotational cooperation with the rotating shaft 3231 through a central hole or bearing, thereby rotating around the rotating shaft 3231. Simultaneously, the rotating shaft 3231 and the main body of the cover 323 are connected and reinforced by the extension rib 3232.

[0100] The rotating shaft 3231 provides the absolute reference rotation center for the rotation of the first transmission structure 3221. By directly setting the rotating shaft 3231 at the geometric center of the cover 323, the axis of the rotating shaft 3231 becomes the immovable absolute rotation reference line defined by the entire top drive module. Through its cooperation with the rotating shaft 3231, the rotation center of the first transmission structure 3221 is forcibly constrained to this reference line. This ensures the coincidence of the rotation axis of the first transmission structure 3221, the theoretical rotation axis of the filter 31, and the central air duct axis of the equipment, achieving coaxial transmission.

[0101] The rotating shaft 3231, through clearance fit or bearing fit with the center hole of the first transmission structure 3221, simultaneously performs the functions of radial positioning and axial limiting. Mechanical reinforcement and reliability are achieved through the extension rib 3232.

[0102] The pivot 3231 at the center of the cover 323 provides precise rotation center positioning for the first transmission structure 3221, ensuring that the first transmission structure 3221 always rotates around a preset axis and completely coincides with the axis of the filter screen 31, eliminating eccentric rotation problems and improving rotation smoothness. The extension rib 3232 strengthens the connection between the pivot 3231 and the cover 323, preventing the pivot 3231 from bending and deforming under radial force, maintaining positioning accuracy during long-term operation, and extending the service life of the structure. The integrated design of the pivot 3231 and the extension rib 3232 eliminates the need for additional positioning components, simplifying the structure and reducing production and assembly costs.

[0103] In one embodiment, such as Figure 14 and Figure 15 As shown, the cover 323 has a clearance opening 3233. The first transmission structure 3221 is connected to the power motor 3223 located outside the first installation space 3201 via the clearance opening 3233. The clearance opening 3233 provides a channel for the transmission connection between the first transmission structure 3221 and the power motor 3223, allowing the power motor 3223 to be flexibly arranged outside the first installation space 3201, optimizing the spatial layout without compromising the closed and protective function of the first installation space 3201. The size of the clearance opening 3233 is precisely matched to the transmission part 463, preventing foreign objects from entering due to an excessively large opening, thus maintaining the protective effect while ensuring the transmission connection. The external design of the power motor 3223 facilitates heat dissipation, preventing heat accumulation in the enclosed space from causing overheating and damage to the motor, extending the motor's service life, not interfering with the movement of other components, and saving design space.

[0104] In one embodiment, such as Figure 11 and Figure 12 As shown, a sealing structure 32335 is provided between the cover 323 and the first transmission structure 3221 to create a sealed barrier and achieve air passage sealing.

[0105] The cover 323 serves as the fixed boundary of the upper purification outlet 3230, and there is a relative circumferential motion between it and the rotating first transmission structure 3221. A sealing structure 32335, including a sealing ring and sealant, is provided at this interface to fill and continuously adapt to the physical gap between them. Utilizing the elasticity, contact pressure, or non-contact fluid resistance of the sealing material, an effective barrier against airflow is formed, preventing the airflow that has been purified by the filter 31 and flows through or around the first transmission structure 3221 from unexpectedly leaking into other non-duct areas inside the equipment. This ensures that all purified air is forcibly directed to the designed upper purification outlet 3230 for discharge.

[0106] The sealing structure 32335 fills the gap between the cover 323 and the first transmission structure 3221, preventing filtered clean air from leaking out of the gap and ensuring that all airflow is discharged through the upper purification outlet 3230, thereby improving purification efficiency. The sealing structure 32335 also prevents external dust from entering the first installation space 3201 through the gap, further enhancing the protection of the rotary drive device 322 and reducing wear and failure probability of the transmission components 463. The sealing structure 32335 also has a certain buffering and vibration damping effect, absorbing vibrations during the operation of the first transmission structure 3221, reducing vibration noise, and improving the overall quietness of the machine's operation.

[0107] In one embodiment, such as Figure 11 , Figure 12 and Figure 13As shown, the first transmission structure 3221 is movably disposed in the first installation space 3201, and a ball bearing structure 325 is provided between the first transmission structure 3221 and the cover 323.

[0108] The filter module 30 includes a first state and a second state. In the first state, the tray 333 is at a first height, and the first transmission structure 3221 contacts and engages with the top frame 321 under its own gravity. In the second state, the tray 333 rises to a second height under the drive of the lifting module 332, and the filter screen 31 rises with the tray 333 and drives the first transmission structure 3221 to move upward, so that the ball structure 325 contacts and engages with the lower surface of the cover 323.

[0109] Through the active deformation of the mechanical structure, namely the tray 333, the filter module 30 can dynamically switch between the first state and the second state to adapt to the installation and maintenance conditions and stable working conditions of the filter 31, respectively.

[0110] The first state is the installation or maintenance state of the filter module 30, and the second state is the working and locked state of the filter module 30. This division structurally decouples the space transfer requirements of the filter module 30 in the installation or maintenance state from the rigid coupling requirements of the filter module 30 in the working and locked state.

[0111] In the first state, by controlling the tray 333 to be at a lower first height, an axial gap sufficient for the filter 31 to move freely horizontally is created between the tray 333 and the upper first transmission structure 3221. This creates the physical conditions for unobstructed access to and placement of the filter 31.

[0112] In the first state, the user's operation of replacing filter 31 can be simplified to a simple "horizontal pick-up and drop", which improves the convenience of filter 31 and enhances the user experience.

[0113] The switching between states is accomplished by vertical movement as the power source and driven by the actuator. When it is necessary to enter the working state, the lifting module 332 outputs power to precisely lift the tray 333 from the first height to a higher second height. This lifting action actively eliminates the aforementioned axial clearance and causes the filter screen 31 to be synchronously limited by the first transmission structure 3221 above and the lower one, thus being clamped between the two.

[0114] In the second state, the filter 31 is axially limited, which effectively prevents axial movement, radial eccentricity, or circumferential slippage that may occur during high-speed rotation of the filter 31. This ensures smooth and uniform rotation of the filter 31, significantly reducing operating noise and overall machine vibration caused by vibration and eccentricity, while also ensuring the uniformity of airflow through the filter 31 and improving the consistency of purification effect.

[0115] In summary, the filter module 30 employs a dual-state switching design, balancing the ease of filter replacement 31 with operational stability. In the first state, the tray 333 is in a low position, allowing the filter 31 to move freely horizontally. This enables quick and easy placement and removal without disassembling other components, completely resolving the cumbersome replacement process of traditional filters 31. In the second state, the tray 333 rises, clamping the filter 31 between the first transmission structure 3221 and the tray 333, forming a stable clamping position. This prevents displacement and eccentricity during filter 31 rotation, ensuring smooth operation. The clamped filter 31 also provides more stable rotational drive force transmission, preventing power loss and noise caused by filter 31 loosening. The dual-state switching is driven by the lifting module 332, eliminating the need for manual pressing or locking, simplifying operation and significantly improving product usability.

[0116] Since the filter screen 31 can rise to cooperate with the first transmission structure 3221 of the top support component 32, the rotary drive device 322 can be set on the top support component 32 on the upper side of the filter module 30 to achieve a better driving effect that is not affected by the gravity of the filter screen 31 itself. Alternatively, the rotary drive device 322 can also be set on the filter support component 33 on the lower side of the filter module 30.

[0117] Rolling friction not only reduces resistance but also makes the movement smoother and more continuous. This makes the rotation of the first transmission structure 3221 and even the entire filter screen 31 more uniform and smooth, reducing vibrations or jamming caused by uneven friction. At the same time, the noise generated by rolling friction is much lower than that of sliding friction, which helps to further optimize the operating noise level of the equipment.

[0118] The dual-state design perfectly serves the filter 31 replacement process. In the first state, the tray 333 is in a low position, and the first transmission structure 3221 can be in a low position or lifted to a high position and then lowered back to a low position during installation, providing maximum unobstructed operating space for inserting the filter 31, making installation easy. After entering the second state, the tray 333 rises to automatically complete the docking and pre-tightening of the filter 31 with the first transmission structure 3221, the process is smooth, and the user experience is excellent.

[0119] In the second state, the first transmission structure 3221 is lifted from below by the filter screen 31 and the tray 333, forming a defined relative position with the cover 323 through the ball bearings 334. The entire transmission chain remains rigidly locked in the axial direction, without axial movement.

[0120] The ball structure 325 can be a complete axial thrust ball bearing 334, or it can be multiple independent balls 334 distributed along the circumference, housed in an annular groove or a separate cage on the upper surface of the first transmission structure 3221.

[0121] The vertically movable design of the first transmission structure 3221, in conjunction with the vertical movement of the tray 333, allows for the following changes in the second state: during rotation, the first transmission structure 3221 is separated from the top frame 321. In this second state, the ball bearing structure 325 engages with the lower surface of the cover 323, converting the sliding friction between the first transmission structure 3221 and the top frame 321 into rolling friction between them. This significantly reduces transmission resistance, decreases the load and power consumption of the motor 3223, reduces friction noise and component wear, and extends service life. The dual-state switching design makes the installation and removal of the filter 31 more convenient. When installing the filter 31, the tray 333 can be moved down and the first transmission structure 3221 moved up simultaneously, providing more space for installation and allowing for easy placement and removal by the user. In the second state, a rigid transmission chain is formed, ensuring stable power transmission while maintaining both convenience and reliability.

[0122] In one embodiment, such as Figures 11-12 , Figure 14 , Figure 15 and Figure 17 As shown, the transmission assembly also includes a drive end structure. The drive end structure is located below the first transmission structure 3221 and is inserted into the mating structure of the filter screen 31 along the axial direction. This insertion fit achieves circumferential positioning between the filter screen 31 and the drive end structure. The mating structure limits the drive end structure circumferentially, and the axial insertion fit ensures more precise alignment between the filter screen 31 and the drive end structure. Combined with the drive of the lifting module 332, quick insertion and removal are possible, improving ease of assembly and disassembly. The insertion fit achieves circumferential positioning, ensuring that the torque of the drive end structure can be efficiently transmitted to the filter screen 31, avoiding power loss caused by relative sliding. It also ensures that the filter screen 31 and the first transmission structure 3221 rotate synchronously, improving rotational smoothness. The plug-in connection structure is simple, requiring no additional locking components, simplifying the assembly process, reducing production and maintenance costs, and exhibiting strong structural stability, adapting to long-term, high-frequency rotational drives.

[0123] In related technologies, the filter screen 31 relies on the friction of the rotating tray 333 to drive its rotation, lacking a forced concentricity and circumferential limiting structure. This leads to eccentricity and slippage during rotation, and the friction-driven rotation is prone to slippage, resulting in poor rotational smoothness. This application designs the drive end structure and the mating structure as an insertion joint along the axis of the filter screen 31. This insertion joint not only achieves physical connection between the two but also restricts their relative circumferential rotation through structural adaptation, forcing the filter screen 31 to rotate coaxially with the drive end structure and avoiding eccentricity errors. At least one of the filter screen 31 or the top support assembly 32 is movable along the axial direction. When replacing it, it can be removed after disengaging from the plug-in connection, which avoids the impact of the traditional fixed plug-in structure on the ease of installation and ensures quick and accurate alignment during installation.

[0124] Therefore, this application achieves circumferential limiting directly through the axial insertion of the drive end structure and the mating structure, abandoning the traditional friction drive method. Structurally, it ensures the concentricity of the rotation of the filter screen 31 and the drive end structure, avoids eccentric movement, and makes the rotation smoother. At the same time, the filter screen 31 can move along the axis, and there is no need to force alignment when replacing it. With the guiding characteristics of the insertion structure, it not only solves the problem of poor concentricity, but also takes into account the convenience of installation and avoids the insertion process affecting the replacement efficiency.

[0125] In one embodiment, such as Figure 11 , Figure 12 and Figures 14-17 As shown, the mating structure and the drive end structure are located at the rotation center of the filter screen 31.

[0126] When using a plug-in connection, if the mating structure deviates from the rotation center of the filter 31, an eccentric torque may still be generated due to torque transmission offset, resulting in slight vibration or eccentricity during rotation. By precisely positioning the mating structure and the drive end structure at the rotation center of the filter 31, using the rotation axis 3231 of the filter 31 as the sole reference, the power output direction of the drive end structure is completely aligned with the rotation direction of the filter 31, ensuring that the torque is uniformly transmitted along the axis without any lateral force component.

[0127] In one embodiment, such as Figures 11-17 As shown, one of the mating structure and the drive end structure is formed as a socket 3121 or a recess, and the other is formed as a protrusion 32212 extending along the axial direction. The protrusion 32212 is mated with the socket 3121 or the recess. By utilizing the cavity constraint of the socket 3121 or the recess and the guiding characteristics of the protrusion, a clear axial mating path is formed, avoiding misalignment and interference during mating, and ensuring mating accuracy and concentricity. The mating length between the insertion protrusion 32212 and the insertion hole 3121 or the insertion recess is less than the distance that the filter screen 31 can move relative to the top support assembly 32 within the housing 10 along the axial direction, allowing sufficient separation stroke. When the filter screen 31 or the top support assembly 32 moves, it can completely disengage from the insertion engagement or achieve a deep and reliable insertion, avoiding problems such as "too tight a fit to separate" or "too shallow a fit to cause transmission failure".

[0128] Therefore, this application clarifies the insertion guide path, making the fit more precise and avoiding misalignment and interference; the limitation of the fit length ensures that the filter 31 can be completely separated or reliably fitted, and the switching process is smooth without jamming. This not only ensures the transmission stability during rotation, but also makes the separation operation when replacing the filter 31 smoother, improving the ease of use.

[0129] In one embodiment, such as Figures 13-17As shown, multiple first limiting ribs 31211 extending axially and spaced apart are formed inside the inner wall of the insertion hole 3121 or the insertion recess, and multiple second limiting ribs 322121 extending axially and spaced apart are formed on the insertion protrusion 32212. While the insertion protrusion 32212 engages with the insertion hole 3121 or the insertion recess, the second limiting ribs 322121 are inserted between two adjacent first limiting ribs 31211. Because the simple surface contact between the insertion hole 3121 or the insertion recess and the insertion protrusion 32212 provides limited circumferential constraint, long-term use can easily lead to slippage and increased transmission clearance, affecting rotational smoothness. Therefore, this application strengthens circumferential limiting through the engagement design of the ribs 424.

[0130] A first limiting rib 31211 and a second limiting rib 322121 extending axially are respectively provided on the inner wall of the insertion hole 3121 or the insertion recess and the insertion protrusion 32212. The physical interference of the ribs 424 achieves circumferential forced limiting. During insertion, the second limiting rib 322121 is precisely inserted into the gap of the adjacent first limiting rib 31211, forming a "gear-type" fit, preventing relative circumferential rotation and making the limiting more reliable.

[0131] In one embodiment, such as Figure 13 As shown, the first limiting rib 31211 includes multiple ribs evenly arranged circumferentially. The circumferential distance between two adjacent first limiting ribs 31211 is greater than the circumferential width of the second limiting rib 322121. Using the rotation center of the filter screen 31 as a reference, the first limiting ribs 31211 are evenly distributed circumferentially to ensure that after the second limiting rib 322121 is inserted, the circumferential force points are symmetrically distributed, with no local stress concentration, thus strengthening concentricity constraints. The design of the circumferential distance between adjacent first limiting ribs 31211 being greater than the circumferential width of the second limiting rib 322121 allows for a reasonable assembly gap, accommodating slight processing errors and installation deviations, preventing the ribs 424 from being forcibly jammed, while not affecting the circumferential limiting effect. Therefore, this application allows for a reasonable assembly allowance when the second limiting rib 322121 is inserted, to accommodate slight processing errors and prevent the rib 424 from getting stuck; the uniform arrangement ensures balanced circumferential force, without local stress concentration, to prevent the filter screen 31 from shifting due to uneven force, and to ensure rotational concentricity.

[0132] In one embodiment, such as Figure 17As shown, the second limiting ribs 322121 include multiple ribs evenly arranged circumferentially. The circumferential distance between two adjacent second limiting ribs 322121 is greater than the circumferential width of the first limiting rib 31211. Using the rotation center of the filter screen 31 as a reference, the second limiting ribs 322121 are evenly arranged circumferentially, echoing the even distribution of the first limiting ribs 31211. This ensures that the force points of the ribs 424 are bidirectionally symmetrical during engagement, with no local stress concentration. This provides double reinforcement of concentricity constraint from both the drive end structure and the filter screen 31 end. The design of the circumferential distance between adjacent second limiting ribs 322121 being greater than the circumferential width of the first limiting rib 31211 complements the "distance greater than the width of the second limiting ribs 322121" of the first limiting ribs 31211. This double-reserved assembly clearance maximizes the adaptation to processing errors, installation deviations, and slight wear after long-term use, preventing the ribs 424 from jamming or becoming too tightly engaged.

[0133] Even if the ribs 424 are evenly distributed circumferentially and assembly gaps are reserved, misalignment may still occur during insertion due to direct collision of the end faces of the ribs 424, leading to insertion jamming or damage to the edges of the ribs 424, affecting ease of operation and structural lifespan. In one embodiment, such as Figure 13 As shown, the first limiting rib 31211 and / or the second limiting rib 322121 are provided with guide slopes 3401. The guide slopes 3401 extend obliquely from the center of the circumference of the limiting rib 424 to both sides in the insertion direction. The guide slopes 3401 on the first limiting rib 31211 and / or the second limiting rib 322121, with the slopes obliquely extending from the circumference of the rib 424 to the center and then to both sides in the insertion direction, utilize the guiding effect of the slopes to ensure that the end face of the rib 424 contacts the rib first during insertion, automatically correcting slight alignment deviations and guiding the rib 424 to smoothly slide into the mating gap, avoiding hard-hitting interference. The guide slopes 3401 change the engagement of the rib 424 from "hard end face contact" to "progressive slope contact," dispersing the impact force during insertion, reducing wear and damage to the edges of the rib 424, while maintaining the circumferential limiting area after engagement, ensuring torque transmission efficiency.

[0134] In other embodiments, the insertion protrusion 32212 is also formed as a splined shaft or a polygonal boss, and the insertion hole 3121 or insertion recess is formed as a spline groove or polygonal recess adapted to the splined shaft or polygonal boss. Utilizing the mature structural characteristics of spline and polygonal mating, circumferential positioning is more reliable, and transmission torque loss is small; the high degree of structural standardization ensures easy processing accuracy, and can stably maintain the concentricity of the filter screen 31 and the drive end structure, avoiding wobbling during rotation and making rotation more stable.

[0135] In one embodiment, such as Figure 10 , Figure 11 and Figure 14As shown, the insertion protrusion 32212 includes a guide portion 3402, which extends obliquely outward from the insertion protrusion 32212 in the insertion direction.

[0136] Furthermore, the guide portion 3402 extends outward at an angle along the insertion direction, forming a "flared" guide structure. This significantly expands the effective range of initial alignment, allowing the insertion hole 3121 or the insertion recess to contact the guide portion 3402 without precise alignment, reducing the difficulty of alignment during manual installation. The inclined guide surface utilizes the guiding characteristics of the inclined surface to automatically correct the radial deviation between the insertion hole 3121 or the insertion recess and the insertion protrusion 32212 during the insertion process through the contact radial component force, guiding them to gradually and precisely align along the axis, avoiding forced interference. The guide portion 3402 is only located at the front end of the insertion protrusion 32212, without changing the precise mating structure at the rear end, ensuring reliable circumferential limiting and coaxial positioning after insertion.

[0137] In one embodiment, such as Figures 11-14 As shown, the insertion hole 3121 or the insertion recess includes a guide fitting portion 3403, which extends obliquely inward toward the insertion hole 3121 or the insertion recess in the insertion direction. The guide fitting portion 3403 extends obliquely inward along the insertion direction, forming a "retractable" guide structure, which corresponds bidirectionally with the "flared" guide portion 3402 of the insertion protrusion 32212. The guide portion 3402 and the guide fitting portion 3403 together expand the initial alignment range, guiding them to fit precisely.

[0138] In some embodiments, the tilt angle of the guide mating part 3403 is adapted to the guide part 3402 of the insertion protrusion 32212. Through the contact action of the bidirectional inclined surfaces, a superimposed guiding force is formed, which can not only correct radial deviations but also offset slight circumferential torsional deviations that may occur during insertion, ensuring precise engagement of the limiting structures such as the rib 424 and spline teeth. The guide mating part 3403 is only provided at the entrance end of the insertion hole 3121 or the insertion recess, without changing the precise mating contour inside the insertion hole 3121 or the insertion recess. After the guidance is completed, the mating structure of the insertion protrusion 32212 is precisely connected to the internal structure of the insertion hole 3121 or the insertion recess, ensuring both ease of assembly and without affecting the circumferential limiting and coaxial positioning accuracy.

[0139] The guide mating part 3403 and the guide part 3402 of the insertion protrusion 32212 form a double guide, which further improves the insertion alignment efficiency and makes the filter screen 31 move up and down more smoothly. The guide mating part 3403 can correct slight installation misalignment, ensure that the drive end structure and the mating structure are precisely coaxial, and ensure rotational concentricity.

[0140] In one embodiment, such as Figures 11-16As shown, the insertion hole 3121 or insertion recess is formed on the filter screen 31, which reduces the number of additional connecting parts of the filter screen 31, simplifies the structure of the filter screen 31, and reduces the replacement cost.

[0141] In other embodiments, the insertion protrusion 32212 is arranged around the rotation center of the filter 31, that is, the insertion protrusion 32212 can be formed into a ring structure. The arrangement around the rotation center makes the driving torque evenly distributed along the rotation axis, avoiding the filter 31 from shifting due to excessive local force, and ensuring rotational concentricity. The ring-shaped design makes the fit more stable, reduces radial sway during rotation, and improves rotational smoothness.

[0142] In some embodiments, the insertion protrusions 32212 include a plurality of protrusions arranged around the rotation center of the filter screen 31 and uniformly distributed in the circumferential direction. That is, multiple insertion protrusions 32212 with the same structural shape can simultaneously engage with the insertion hole 3121 or the insertion recess, thus achieving the above-mentioned purpose. This ensures circumferential force balance, with each insertion protrusion 32212 sharing the torque and avoiding stress concentration in a single mating structure; the uniform distribution ensures symmetrical force on the filter screen 31, eliminating off-center load during rotation, solving the problem of uneven rotation, and improving the load-bearing capacity of the mating structure.

[0143] In one embodiment, such as Figure 14 As shown, the filter screen 31 includes a cylindrical filter cotton 311 and end cap structures disposed on both axial sides of the filter cotton 311, with the mating structure formed on the end cap structures.

[0144] If the mating structure is directly formed on the filter cotton 311, the soft material and loose structure of the filter cotton 311 cannot provide a stable installation reference and torque bearing capacity, which can easily lead to misalignment and deformation of the mating structure, disrupting concentricity. Simultaneously, the filter cotton 311 is unrestrained axially, making it prone to displacement and wrinkling during rotation, affecting filtration efficiency and rotational smoothness. By setting end cap structures on both axial sides, made of rigid materials, the end caps provide a stable mounting carrier for the mating structure, preventing misalignment due to filter cotton 311 deformation and ensuring precise coaxiality between the mating structure and the rotation center of the filter screen 31. The end caps fit snugly against the axial end faces of the filter cotton 311, fixing it through positioning and snap-fitting methods, limiting axial displacement and radial deformation of the filter cotton 311, maintaining the integrity of the cylindrical structure of the filter screen 31, and preventing airflow turbulence or increased rotational resistance caused by wrinkles or misalignment of the filter cotton 311 during rotation. In addition, with the structure formed after the end cap, the driving torque is evenly transmitted to the entire filter cotton 311 through the end cap, avoiding structural damage caused by the torque being concentrated in a local area of ​​the filter cotton 311; at the same time, the two end caps form symmetrical support, balancing the axial force on the filter screen 31 and avoiding eccentricity caused by unilateral force.

[0145] In one embodiment, such as Figure 14As shown, the end cap structure includes an upper end cap 312, which includes a mating structure, an end cap body 3122, and reinforcing ribs 3123. The mating structure is formed in the central region of the end cap body 3122. The end cap body 3122 is in contact with the axial end face of the filter cotton 311. The reinforcing ribs 3123 extend radially along the end cap and are distributed at intervals in the circumferential direction. One end of the ribs is connected to the mating structure, and the other end is connected to the end cap body 3122.

[0146] By setting up reinforcing ribs 3123 that extend radially and are spaced circumferentially, one end of which is connected to the mating structure at the center and the other end is connected to the edge of the end cap body 3122, a "center-edge" force transmission path is formed, which disperses the driving torque from the mating structure to the entire end cap body 3122, thus avoiding deformation or breakage of the mating structure due to stress concentration around the mating structure.

[0147] Preferably, the reinforcing rib 3123 and the end cap body 3122 can be injection molded in one step, without additional assembly processes, thus not increasing production complexity and avoiding an increase in the defect rate due to end cap deformation, balancing structural performance and production costs. The reinforcing rib 3123 of the upper end cap 312 radially disperses the force on the mating structure, preventing the mating structure from breaking or deforming due to torque, and ensuring the stability of the mating structure after long-term use; the circumferentially spaced reinforcing ribs 3123 ensure that the end cap is subjected to balanced force, without affecting the concentricity of the filter screen 31, while reducing the weight of the end cap, reducing the driving load, and providing space for airflow inside the end cap body 3122.

[0148] In one embodiment, such as Figure 14 As shown, a positioning ring 31221 is provided on the side of the end cap body 3122 facing the filter cotton 311. The positioning ring 31221 extends circumferentially along the end cap body 3122 and is positioned on the inner or outer ring of the filter cotton 311.

[0149] The lack of a radial limiting structure between the upper end cap 312 and the filter cotton 311 makes it prone to radial displacement and eccentricity relative to the end cap during rotation, resulting in a decrease in the overall concentricity of the filter screen 31. Simultaneously, the gap between the filter cotton 311 and the end cap can cause airflow leakage, affecting purification efficiency. A circumferentially extending positioning ring 31221 is provided on the side of the end cap body 3122 facing the filter cotton 311. The positioning ring 31221 is precisely embedded into the inner or outer ring of the filter cotton 311. Utilizing the radial constraint effect of the positioning ring 31221, the central axis of the filter cotton 311 is forced to completely coincide with the central axis of the end cap body 3122, thereby ensuring that the mating structure between the filter cotton 311 and the center of the end cap is coaxial, locking the overall concentricity benchmark from within the filter screen 31.

[0150] In one embodiment, such as Figure 11 and Figure 12As shown, the reinforcing rib 3123 extends obliquely away from the end cap body 3122 in the direction close to the mating structure. The oblique reinforcing rib 3123 forms an "oblique support skeleton". Compared with straight ribs, its supporting force can be decomposed into radial and axial components. It can effectively disperse the torque transmitted by the mating structure and resist the axial impact force generated during insertion, which greatly improves the torsional and impact resistance of the end cap and avoids the mating structure from shifting due to uneven force.

[0151] Preferably, the reinforcing ribs 3123 are radially inclined around the mating structure and are evenly spaced circumferentially, ensuring that the supporting force of each reinforcing rib 3123 is consistent, maintaining the coaxiality of the mating structure and the end cap body 3122, and locking the concentricity benchmark of the filter screen 31 from the internal structural level of the end cap. In addition, the inclined design enhances the torsional resistance of the reinforcing ribs 3123, further improving the stability of the mating structure, ensuring smooth force transmission when the filter screen 31 rotates, and the arrangement of the reinforcing ribs 3123 makes the mating structure closer to the drive end structure, making it easier for the two to be inserted and mated.

[0152] In one embodiment, such as Figure 10 , Figure 11 and Figure 12 As shown, the filter screen 31 extends vertically along its axial direction. The top support assembly 32 is located above the filter screen 31. The top support assembly 32 includes a top frame 321, which is fixedly installed inside the housing and has a first opening 3211. The rotary drive device 322 includes a power motor 3223 and a first transmission structure 3221. The first transmission structure 3221 is rotatably installed above the top frame 321. A drive end structure is located below the first transmission structure 3221. The drive end structure passes through the first opening 3211 and cooperates with the filter screen 31. Under the drive of the power motor 3223, the first transmission structure 3221 rotates synchronously with the filter screen 31 around the rotation center of the filter screen 31.

[0153] The structural layout above the top frame 321 makes full use of the vertical space inside the outer shell 10, avoiding interference between the rotation drive device 322 and the air inlet and outlet paths, ensuring smooth airflow; the drive end structure set below the first transmission structure 3221 passes through the first opening 3211 and cooperates with the filter screen 31, shortening the transmission path between the two, reducing transmission error, improving concentricity, and making the rotation smoother.

[0154] In some embodiments, a rotatable tray 333 is provided below the filter screen 31 body. This application decouples the self-weight bearing and rotation drive task of the filter screen 31 into two independent functional components. The tray 333 of the filter screen support component 33 serves as a dedicated self-weight bearing structure, directly bearing the entire weight load of the cylindrical filter screen 31, so that the self-weight of the filter screen 31 is transmitted to the bottom frame 331 through the tray 333, and finally the outer shell 10 achieves stable bearing. The rotation drive device 322 of the top support component 32 only undertakes the single task of "providing rotation torque", and does not need to do work against the self-weight of the filter screen 31. It only needs to output rotation torque to drive the filter screen 31, avoiding technical failures such as jamming, uneven speed, and inability to rotate caused by the self-weight load in the traditional lower drive mode.

[0155] Meanwhile, the tray 333 adopts a "rotatable setting" structural design, which is connected to the bottom frame 331 through ball bearings 334 or sliding bearings, so that the tray 333 can rotate synchronously with the filter screen 31, which can realize the function of bearing its own weight without hindering the rotation of the filter screen 31, and at the same time, it does not generate rotational resistance, realizing the coordinated work of the tray 333 in bearing and following.

[0156] The filter module 30 adopts a modular design consisting of a top support component 32, a filter support component 33, and a filter 31. The top support component 32 integrates the driving function and the function of limiting the upper airflow duct 212, while the filter support component 33 integrates the load-bearing function and the function of limiting the lower airflow duct. The filter 31 is placed between the two components. This structure makes the functional boundaries of each component clear. During assembly, the two main components can be fixed in the housing 10 first, and then the filter 31 can be installed, simplifying the assembly process. During maintenance, any module can be disassembled and assembled individually, effectively simplifying the assembly process and significantly reducing the difficulty of maintenance.

[0157] Furthermore, the top-driven layout provides more space below the bottom frame 331 inside the shell 10, enabling structural avoidance.

[0158] In summary, this application overturns the traditional layout where the filter 31 is driven by the lower tray 333. Instead, it integrates the rotary drive device 322 into the top frame 321, and the weight of the filter 31 is supported by the lower tray 333. The rotary drive device 322 does not need to work against the weight of the filter 31, thus completely solving the problem of insufficient motor torque caused by the weight of the lower drive. The smoothness of the rotation of the filter 31 is significantly improved, avoiding malfunctions such as jamming or even failure to rotate.

[0159] In one embodiment, such as Figure 14 , Figure 15 and Figure 17As shown, the first transmission structure 3221 includes: a connecting rib 32214, a transmission body 32213 formed in a ring shape, and a first mounting part 32211. The first mounting part 32211 is located at the center of the transmission body 32213, and the driving end structure is located below the first mounting part 32211. The connecting rib 32214 extends radially along the first transmission structure 3221 and is distributed at intervals in the circumferential direction. One end of its radial direction is connected to the first mounting part 32211, and the other end is connected to the transmission body 32213.

[0160] If the first transmission structure 3221 adopts a solid plate design, it will block the top air outlet and increase the structural weight. At the same time, the stress distribution of the solid structure is uneven, and it is prone to deformation under high torque conditions. In addition, the solid structure makes it difficult to balance the coaxial installation of the drive end structure and transmission efficiency. Designing the transmission body 32213 as a ring shape to replace the traditional solid structure not only significantly reduces the overall weight of the transmission structure and reduces the load and energy consumption of the power motor 3223, but also leaves a flow channel for the top airflow, avoiding the increase in airflow resistance caused by blocking the upper air outlet 101, and is compatible with the upper and lower dual air outlet layout of the purifier.

[0161] A first mounting part 32211 is set at the center of the transmission body 32213, and the drive end structure is precisely set below the first mounting part 32211 to ensure that the axis of the drive end structure is completely coincident with the rotation axis of the transmission body 32213; at the same time, the connecting ribs 32214 extend radially and are evenly distributed circumferentially to rigidly connect the first mounting part 32211 and the transmission body 32213 to form a stable support structure, ensuring that the first mounting part 32211 has no radial offset during power transmission and is precisely connected with the mating structure of the filter screen 31.

[0162] In one embodiment, such as Figures 18-30 As shown, the filter support assembly 33 includes: The bottom frame 331 is fixedly installed inside the outer shell 10. A lower purification outlet 3311 is formed on the bottom frame 331. A tray 333 is arranged around the lower purification outlet 3311. A lifting module 332 is arranged between the tray 333 and the bottom frame 331.

[0163] Thus, based on the bottom frame 331, a clear functional division is achieved inside the outer shell 10, providing a rigid foundation for the lifting process.

[0164] The bottom frame 331 is fixedly installed inside the outer casing 10. Its primary function is to serve as the installation reference and load-bearing foundation for the entire filter support assembly 33 and even the filter module 30. It provides a precise and immovable reference plane and installation interface for all subsequent moving parts, such as the tray 333 and the lifting module 332, ensuring the overall structural rigidity and positional accuracy of the assembly. At the same time, the lower purification outlet 3311 is directly formed on the bottom frame 331, which means that it integrates the load-bearing function and the air duct function, defining the starting point of the path for clean air to be discharged from the filter module 30.

[0165] The tray 333 is designed to surround the lower purification outlet 3311, so that the inner ring area of ​​the tray 333 is empty and corresponds to the lower purification outlet 3311. This allows the clean air flowing out from the inside of the filter 31 to be discharged directly through the lower purification outlet 3311 without any obstruction. The tray 333 only provides annular support for the bottom of the filter 31 in the outer ring area. This achieves physical separation of the "support surface" and the "airflow channel" in the radial space, so that they do not interfere with each other.

[0166] The lifting module 332 is positioned between the tray 333 and the bottom frame 331. By utilizing the interlayer area formed between the lower surface of the tray 333 and the upper surface of the bottom frame 331, the lifting module 332 is completely hidden and protected under the tray 333, which forms a support platform. This achieves isolation between the lifting module 332 and the filter screen 31, ensuring the stability of the support effect.

[0167] The bottom frame 331 provides a rigid mounting reference for the tray 333 and the lifting module 332, ensuring that the driving force of the lifting module 332 is stably transmitted to the tray 333, avoiding tilting or jamming during lifting, and improving the coaxiality of the filter 31 clamping. The tray 333 is positioned around the lower purification outlet 3311, without obstructing the exhaust channel of the filtered clean airflow, ensuring the ventilation efficiency of the lower air outlet 102, and at the same time ensuring that the bottom of the filter 31 is evenly stressed, preventing excessive local pressure from deforming the filter 31. The lifting module 332 is hidden between the tray 333 and the bottom frame 331, optimizing the space layout, making the filter support component 33 compact, reducing the space occupied inside the purifier, and facilitating the miniaturization of the entire unit.

[0168] In other embodiments, the tray 333 may be directly integrated into the lifting module 332, which is not limited here.

[0169] In one embodiment, the lifting module 332 can drive the tray 333 to rise and fall, and may include an elastic element 461 with the reset direction upward to form a lifting assembly, or the tray 333 may be driven to rise and fall by other drive end structures.

[0170] like Figures 18-31As shown, the lifting module 332 includes a rotary switch 3321, which is movably disposed above the bottom frame 331 between an open position and a locked position. In a first state, the rotary switch 3321 is in the open position, and in a second state, the rotary switch 3321 is in the locked position.

[0171] In other words, the lifting module 332 of this application uses a mechanical rotary switch 3321 to achieve the switching drive. Since the tray 333 is formed into a ring structure surrounding the lower purification outlet 3311, the lifting module 332 is similar in shape to the tray 333 and is also a ring-like structure. The rotation process of the rotary switch 3321 does not change the projection coverage position and area of ​​the lifting module 332 on the horizontal plane, which is more suitable for achieving the lifting drive of the lifting module 332 by rotating the rotary switch 3321.

[0172] The rotary switch 3321 is designed to move only between two defined positions: the open position and the locked position. These two positions correspond one-to-one with the first and second states of the filter module 30, forming an intuitive and reliable mapping relationship between position and state. By limiting the end point of the switch's travel, the mechanical structure ensures that the system can only stably exist in these two preset operating modes, avoiding limit failure caused by inaccurate adjustment.

[0173] The circumferential rotation of the switch itself, through a specific structure, can be converted into the axial lifting motion required to drive the tray 333. This conversion of motion allows the user to indirectly and effectively control the lifting process of the tray 333 through a simple rotational action.

[0174] The dual-state switching is achieved using a rotary switch 3321, which is simple and intuitive to operate. Users can lock and unlock the filter 31 with a simple rotation of the switch 3321. Compared with push-button or snap-on structures, this reduces the force required for operation and improves ease of use. The position of the rotary switch 3321 corresponds one-to-one with the state of the filter module 30. Users can visually determine whether the filter 31 is locked by observing the switch position, avoiding operational malfunctions caused by the filter 31 not being properly secured, and improving operational safety. The rotary switch 3321 has a high mechanical structure reliability and is not prone to aging and failure, reducing the failure rate and extending the product's lifespan compared to electronic switches.

[0175] In other embodiments, the lifting module 332 may also use an electronic switch to achieve lifting switching, which is not limited here.

[0176] In one embodiment, such as Figure 18 and Figure 19As shown, the bottom frame 331 is provided with a first driving inclined surface 33131. While rotating the rotary switch 3321 between the open position and the locked position, it slides up and down above the first driving inclined surface 33131.

[0177] A first driving ramp 33131 is provided on the bottom frame 331, and the rotary switch 3321 slides up and down above the first driving ramp 33131 while rotating between the open and locked positions. This ramp mechanism directly and efficiently converts the rotational motion of the rotary switch 3321 into its own axial lifting motion.

[0178] According to the principles of inclined plane mechanics, when an object slides along an inclined plane, its displacement along the inclined plane can be decomposed into vertical and horizontal components. The first driving inclined plane 33131 is fixed to the bottom frame 331, and its inclination direction has a height change in the circumferential direction, that is, along the rotation path of the rotary switch 3321. When the rotary switch 3321 rotates relative to the bottom frame 331, the part of the switch in contact with the inclined plane will be forced to move along the contour trajectory of the inclined plane. Due to the radial and circumferential constraints of the inclined plane, this relative sliding in the circumferential direction will inevitably cause the rotary switch 3321 to generate a forced upward or downward displacement in the vertical direction, thereby realizing the linkage between "rotation" and "lifting".

[0179] By using a fixed inclined plane in conjunction with the rotary switch 3321, the conversion from rotation to lifting is achieved without the need for complex transmission mechanisms such as additional gears and racks, lead screws and nuts, connecting rods and hinges, or independent electric push rods. This makes the lifting module 332 extremely simple in structure, with few parts and easy assembly.

[0180] Inclined plane transmission inherently features smooth motion and minimal impact. The process of rotating switch 3321 sliding up or down along the inclined plane is smooth and controllable.

[0181] The first driving inclined surface 33131 can be a continuous inclined surface, a segmented inclined surface, or a composite surface composed of an inclined plane and a horizontal plane. Its surface can be treated with a friction-reducing coating or have lubricating grease grooves. The mating part of the rotary switch 3321 with the inclined surface can be designed as a roller or a slider to further reduce friction.

[0182] In other embodiments, the inclined surface may also be provided on the lower surface of the rotary switch 3321, and the corresponding mating structure is provided on the bottom frame 331 to achieve a reverse mating relationship.

[0183] By utilizing the guiding effect of the first driving inclined surface 33131, the circumferential rotational motion of the rotary switch 3321 is converted into axial lifting motion, eliminating the need for additional lifting drive components, simplifying the structure of the lifting module 332, and reducing production and assembly costs. The inclined surface drive method ensures a smooth and stable lifting process, avoiding any jerking sensation. Simultaneously, the even distribution of driving force ensures the synchronous lifting of the rotary switch 3321, preventing uneven clamping of the filter screen 31 due to tray 333 tilting. The inclined surface structure has a self-locking characteristic; after the rotary switch 3321 is switched to the locked position, it maintains a stable height under the support of the inclined surface, preventing the filter screen 31 from loosening due to vibration or external force, and improving the stability of the filter screen 31's working state.

[0184] In one embodiment, such as Figure 18 and Figure 19 As shown, a first protrusion 3313 is formed on the bottom frame 331, and a first driving inclined surface 33131 is formed on the first protrusion 3313, which is inclined vertically in the circumferential direction. A first groove is formed on the lower surface of the rotary switch 3321. In the first state, the first protrusion 3313 is accommodated in the first groove.

[0185] A first protrusion 3313 is formed on the bottom frame 331, and a first driving inclined surface 33131 with a height variation in the circumferential direction is constructed on the first protrusion 3313; correspondingly, a first groove is formed on the lower surface of the rotary switch 3321, thus constructing an embedded convex-concave mating mechanism that integrates precise positioning, motion guidance and stroke limitation.

[0186] When the filter module 30 is in the first state, i.e., the rotary switch 3321 is in the open position, the first protrusion 3313 is accommodated in the first groove. Through the engagement of the first protrusion 3313 with the sidewall of the first groove, the rotary switch 3321 is precisely positioned radially, preventing it from shifting when not in operation. The inner wall of the first groove contacts the top surface of the first protrusion 3313, determining the precise axial height of the rotary switch 3321 in this state, thereby indirectly ensuring that the tray 333 is at the preset "first height". This embedded engagement constitutes a stable mechanical lock in the first state.

[0187] The number of first protrusions 3313 and first grooves can be multiple, evenly distributed circumferentially to enhance positioning stability and force balance. The specific contour of the first driving inclined surface 33131 can be a straight inclined surface or a composite curved surface, etc., to optimize the relationship between force and stroke. Elastic material can be provided on the top of the protrusion or the bottom of the groove.

[0188] The engagement of the first protrusion 3313 and the first groove ensures precise positioning of the rotary switch 3321 in the open position, preventing switch displacement due to non-human operation and ensuring that the filter 31 can be freely placed and removed in the first state. The circumferentially inclined first drive ramp 33131 fits against the side wall of the first groove, making the guiding effect of the ramp more precise and the motion conversion efficiency higher when rotating the rotary switch 3321, further improving the smoothness of the lifting action. The embedded engagement structure of the protrusion and groove is compact, occupies little space, and at the same time enhances the connection strength between the rotary switch 3321 and the bottom frame 331, improving the overall rigidity of the lifting module 332.

[0189] In one embodiment, such as Figures 18-30 As shown, the lifting module 332 includes: a slider structure 3322 that is vertically movable between the tray 333 and the rotary switch 3321. The upper surface of the rotary switch 3321 is provided with a second driving inclined surface 332121. While the rotary switch 3321 rotates between the open position and the locked position, the slider structure 3322 slides up and down above the second driving inclined surface 332121.

[0190] A slider structure 3322 is introduced in the lifting module 332 between the tray 333 and the rotary switch 3321. The slider structure 3322 can only move vertically up and down, ensuring that the rotation of the rotary switch 3321 and the tray 333 can be carried out independently, avoiding unnecessary synchronous rotation of the two.

[0191] As an independent intermediate component, the slider structure 3322 indirectly transmits the driving force of the rotary switch 3321 to the tray 333, achieving functional decoupling. Driven by the rotary switch 3321, the slider transmits the driving force and guides it in the vertical direction, avoiding direct and complex coupling between the rotary switch 3321 and the tray 333, allowing each part to be optimized independently. Simultaneously, by providing a sufficiently large contact surface between the slider structure 3322 and the tray 333, the slider structure 3322 can transmit the driving force of the rotary switch 3321 to the tray 333 more evenly and stably, preventing tilting caused by excessive force at a single point or uneven force on the tray 333.

[0192] The slider structure 3322 can be a complete ring or multiple independent sliders distributed circumferentially.

[0193] A second driving inclined surface 332121 is provided on the rotary switch 3321. While the rotary switch 3321 rotates between the open and locked positions, the slider structure 3322 slides up and down above the second driving inclined surface 332121. This inclined surface mechanism directly and efficiently converts the rotational motion of the rotary switch 3321 into the axial lifting motion of the slider structure 3322.

[0194] According to the principles of inclined plane mechanics, when an object slides along an inclined plane, its displacement along the inclined plane can be decomposed into vertical and horizontal components. The slider structure 3322 has only one degree of freedom in vertical movement, while the second driving inclined plane 332121 has a height variation along its circumferential direction, i.e., along the rotation path of the rotary switch 3321. When the rotary switch 3321 rotates relative to the slider structure 3322, the portion of the slider structure 3322 in contact with the second driving inclined plane 332121 is forced to move along the contour trajectory of the inclined plane. Due to the radial and circumferential constraints of the inclined plane, this relative sliding in the circumferential direction inevitably causes the slider structure 3322 to produce a forced upward or downward displacement in the vertical direction, thus achieving the linkage between "rotation" and "lifting / lowering".

[0195] By using a fixed inclined plane in conjunction with the slider structure 3322, the conversion from rotation to lifting is achieved without the need for complex transmission mechanisms such as additional gears and racks, lead screws and nuts, connecting rods and hinges, or independent electric push rods. This makes the lifting module 332 extremely simple in structure, with few parts and easy assembly.

[0196] Inclined plane transmission inherently features smooth motion and minimal impact. The slider structure 3322 slides smoothly and controllably upwards or downwards along the inclined plane.

[0197] The second driving inclined surface 332121 can be a continuous inclined surface, a segmented inclined surface, or a composite surface composed of an inclined plane and a horizontal plane. Its surface can be treated with a friction-reducing coating or have lubricating grease grooves. The part of the slider structure 3322 that mates with the inclined surface can be designed as a roller or a slider to further reduce friction.

[0198] In other embodiments, the inclined surface may also be provided on the lower surface of the slider structure 3322, while the corresponding mating structure is provided on the rotary switch 3321 to achieve a reverse mating relationship.

[0199] By utilizing the guiding effect of the second driving inclined surface 332121, the circumferential rotational motion of the rotary switch 3321 is converted into the axial lifting motion of the slider structure 3322. This eliminates the need for additional lifting drive components, simplifying the structure of the lifting module 332 and reducing production and assembly costs. The inclined surface drive method ensures a smooth and stable lifting process, avoiding any jerking sensation. Simultaneously, the driving force is evenly distributed, ensuring the synchronous lifting of the rotary switch 3321 and preventing uneven clamping of the filter screen 31 due to tray 333 tilting. The inclined surface structure has a self-locking characteristic; after the rotary switch 3321 is switched to the locked position, the slider structure 3322 can maintain a stable height under the support of the inclined surface, preventing the filter screen 31 from loosening due to vibration or external force, and improving the stability of the filter screen 31's working state. The slider structure 3322 receives the driving force from the rotary switch 3321 and transmits it to the tray 333, making the force on the tray 333 more even. The lifting assembly cooperates with the tray 333 through the slider structure 3322, which has no degrees of freedom in the circumferential direction, preventing the tray 333 from driving the lifting assembly to rotate and ensuring structural stability. The slider structure 3322 also increases the contact area between the lifting module 332 and the tray 333, preventing deformation of the tray 333 due to single-point force, ensuring that the filter screen 31 is horizontally clamped and improving rotational stability.

[0200] In one embodiment, such as Figure 29 and Figure 31 As shown, a second protrusion 33212 is formed on the rotary switch 3321, and a second driving inclined surface 332121 is formed on the second protrusion 33212, which is inclined vertically in the circumferential direction. A second groove 33221 is formed on the lower surface of the slider structure 3322. In the first state, the second protrusion 33212 is accommodated in the second groove 33221.

[0201] A second protrusion 33212 is formed on the rotary switch 3321, and a second driving inclined surface 332121 with a height variation in the circumferential direction is constructed on the second protrusion 33212; correspondingly, a second groove 33221 is formed on the lower surface of the slider structure 3322, thus constructing an embedded convex-concave mating mechanism that integrates precise positioning, motion guidance and stroke limitation.

[0202] When the filter module 30 is in the first state, i.e., the rotary switch 3321 is in the open position, the second protrusion 33212 is accommodated within the second groove 33221. Through the engagement of the second protrusion 33212 with the sidewall of the second groove 33221, precise radial positioning of the rotary switch 3321 and the slider structure 3322 is achieved, preventing displacement during non-operation. The inner wall of the second groove 33221 contacts the top surface of the second protrusion 33212, determining the precise axial height of the slider structure 3322 in this state, thereby indirectly ensuring that the tray 333 is at the preset "first height." This embedded engagement constitutes a stable mechanical lock in the first state.

[0203] The number of second protrusions 33212 and second grooves 33221 can be multiple, evenly distributed circumferentially to enhance positioning stability and force balance. The specific contour of the second driving inclined surface 332121 can be a straight inclined surface or a composite curved surface, etc., to optimize the relationship between force and stroke. Elastic material can be provided on the top of the protrusion or the bottom of the groove.

[0204] The engagement of the second protrusion 33212 and the second groove 33221 enables precise positioning of the slider structure 3322 in its first state, ensuring that the tray 333 is at a preset low height and providing ample space for the horizontal movement of the filter screen 31. The circumferentially inclined second drive ramp 332121 fits tightly against the sidewall of the second groove 33221. When the rotary switch 3321 rotates, the driving force is evenly transmitted to the slider structure 3322 through the ramp, preventing the slider structure 3322 from jamming or shifting, and improving the synchronization of the lifting action. The engagement structure of the protrusion and groove has a limiting function, preventing the slider structure 3322 from disengaging from the rotary switch 3321, improving the structural reliability of the lifting module 332, and extending its service life. The embedded engagement structure of the protrusion and groove is compact, occupying little space, while also enhancing the connection strength between the rotary switch 3321 and the bottom frame 331, improving the overall rigidity of the lifting module 332.

[0205] In one embodiment, such as Figure 18 , Figure 19 and Figure 31 As shown, a first protrusion 3313 is formed on the bottom frame 331, and a first driving inclined surface 33131 is formed on the first protrusion 3313, which is inclined vertically in the circumferential direction. The inner wall of the part corresponding to the second protrusion 33212 is empty, and a first groove is formed on the lower surface of the rotary switch 3321. In the first state, the first protrusion 3313 is accommodated in the first groove.

[0206] Within a limited thickness space, a first-level drive interface with the rotary switch 3321 and the bottom frame 331 and a second-level drive interface with the slider structure 3322 are integrated.

[0207] The rotary switch 3321, acting as an intermediate transmission component, has a first groove on its lower surface that mates with the first protrusion 3313 of the bottom frame 331, and a second protrusion 33212 on its upper surface for driving the slider structure 3322. To achieve a minimum axial thickness, the internal area of ​​the rotary switch 3321 corresponding to the second protrusion 33212 is designed to have an "empty inner wall." This empty area provides vertical space for the first protrusion 3313 from the bottom frame 331 to accommodate and move. This allows the first protrusion 3313 of the bottom frame 331 to "pass through" the hollow area of ​​the rotary switch 3321 body, enabling its first driving ramp 33131 to contact and engage with the sidewall of the first groove on the lower surface of the rotary switch 3321.

[0208] When the user rotates the rotary switch 3321, two motion conversion processes can occur in steps or simultaneously: In the first conversion stage, the inner wall of the first groove on the lower surface of the rotary switch 3321 slides along the first driving inclined surface 33131 of the first protrusion 3313 of the bottom frame 331. This inclined surface forces the rotary switch 3321 to generate an axial lifting displacement while rotating.

[0209] In the second-stage conversion phase, the second protrusion 33212 on the upper surface of the rotary switch 3321 slides within the second groove 33221 of the slider. This slope forces the slider to produce an axial displacement relative to the rotary switch 3321, moving away from or closer to it.

[0210] Ultimately, in the second state, the total lifting stroke of the slider, tray 333, and filter 31 is the vector sum of these two axial displacements. This design allows for a greater total lift than a single-stage drive, or the required lift to be achieved with less operating force, while maintaining the same rotation angle and thickness of the rotary switch 3321.

[0211] By adding a first driving inclined surface 33131 to the existing second driving inclined surface 332121, a two-stage inclined surface drive is formed. This allows for a further increase in the lifting stroke of the rotary switch 3321 during rotation without increasing its thickness, thus adapting to filters 31 of different thicknesses and improving product compatibility. The two-stage inclined surface drive design reduces the operating resistance of the rotary switch 3321, making it easier for users to rotate the switch.

[0212] The inner wall of the second protrusion 33212 is left empty, providing space for the first protrusion 3313. This nested layout of the upper and lower inclined drive end structures significantly reduces the axial dimension of the lifting module 332, achieving an ultra-compact design and facilitating optimized configuration of the purifier's internal space. The first and second driving inclined surfaces 332121 drive in the same direction. When the rotary switch 3321 rotates, the two inclined drive surfaces exert force synchronously or separately, improving lifting efficiency while ensuring the stability and coaxiality of the tray 333 during lifting. The empty inner wall design reduces the material usage of the rotary switch 3321, achieving lightweighting while maintaining structural strength, thus reducing the overall weight and production cost.

[0213] In one embodiment, such as Figures 18-30 As shown, the bottom frame 331 surrounds the lower purification outlet 3311 and has a second mounting part 3312 formed as a cylinder. The lifting module 332 is sleeved on the outside of the second mounting part 3312. The second mounting part 3312 has a guide rail structure 33121 extending vertically. The slider structure 3322 cooperates with the guide rail and moves along the extension direction of the guide rail.

[0214] The bottom frame 331 surrounds the lower purification outlet 3311 to form the second mounting part 3312 of the cylinder, meaning that the second mounting part 3312 is primarily a physical extension and component of the lower purification duct. The design reinforces it as a "central cylinder" with sufficient structural rigidity. This cylinder serves multiple roles: it is the channel for clean airflow discharge, the central positioning reference for the entire lifting module 332, the mounting foundation and load-bearing core for the lifting module 332 and tray 333, and guides the movement of various structural components of the lifting module 332 and tray 333.

[0215] The central cylinder provides a natural, immovable center for the lifting module 332 that is fitted on the outside, which forcibly ensures that all movements of the entire lifting module 332 are around this central axis, fundamentally guaranteeing that the lifting of the tray 333 has a higher degree of coaxiality.

[0216] A vertically extending guide rail structure 33121 is formed on the outer wall of the second mounting portion 3312 of the cylinder. A corresponding portion of the slider structure 3322 mates with this guide rail. This design strictly limits the circumferential freedom of the slider structure 3322, allowing it to move only vertically along the guide rail direction, completely eliminating the possibility of circumferential rotation. This ensures that regardless of how the rotary switch 3321 is rotated, only a pure axial force is transmitted to the slider, and the slider drives the tray 333 to perform only a pure vertical lifting and lowering, avoiding any tilting or twisting.

[0217] The cylindrical second mounting part 3312 provides a central positioning reference for the lifting module 332, ensuring that the lifting module 332 is coaxially arranged around the lower purification outlet 3311, avoiding radial offset during lifting and improving the clamping accuracy of the filter screen 31. The vertical guide rail structure 33121 guides the lifting movement of the slider structure 3322, restricting the circumferential rotation of the slider structure 3322 and ensuring that the slider structure 3322 moves only along the axial direction, further improving the stability and levelness of the tray 333 lifting and lowering. This ensures that during the rotation of the rotary switch 3321, the slider structure 3322 moves vertically under the drive of the second driving inclined surface 332121.

[0218] The cooperation between the guide rail and the slider reduces the frictional resistance during the lifting process, making the operation of the rotary switch 3321 easier, while reducing component wear and extending the service life of the lifting module 332.

[0219] In one embodiment, such as Figures 19-21 As shown, the lifting module 332 also includes: a lever 3323, which slides between the unlocked and locked positions along a horizontal first direction; the rotary switch 3321 is provided with a pin 33231 extending vertically; the lever 3323 is provided with a long sliding hole 33213; and the pin 33231 is inserted into the long sliding hole 33213 and slides in cooperation with the long sliding hole 33213.

[0220] Thus, the power input point of the lifting module 332 is transferred from the rotary switch 3321 itself to a separate lever 3323. The horizontal linear sliding operation applied by the user to the lever 3323 is more intuitive and easier to apply force when operating from the side of the device. When the lever 3323 is moved horizontally, the pin 33231 pushes or pulls the wall of the long sliding hole 33213. Since the long sliding hole 33213 is located on the rotary switch 3321, this force will generate a torque that drives the rotary switch 3321 to rotate around its axis.

[0221] The cooperation between lever 3323 and pin 33231 transforms the user's horizontal sliding operation of lever 3323 into the circumferential rotation of switch 3321. This operation method is more ergonomic, allowing users to easily lock and unlock filter 31 by pushing and pulling lever 3323, improving ease of use. The sliding engagement between long sliding hole 33213 and pin 33231 accommodates both the rotational and axial lifting movements of switch 3321, ensuring that lever 3323 operation and lifting actions do not interfere with each other, improving the structural motion coordination. The lever 3323 allows for flexible arrangement of the switch operation position, facilitating the extension of the operating end to the outside of the purifier housing 10 for convenient user operation.

[0222] In one embodiment, such as Figures 19-21As shown, the elongated sliding hole 33213 extends radially along the rotary switch 3321. This radial extension ensures that the sliding direction of the pin 33231 within the hole aligns with the rotational tangent direction of the rotary switch 3321, resulting in higher force transmission efficiency and requiring less effort from the user when pushing the lever 3323, thus reducing operational resistance. The radially elongated sliding hole 33213 adapts to variations in the rotation radius of the rotary switch 3321, ensuring that the pin 33231 always slides within the hole, preventing jamming and improving the structural reliability. The radial layout allows for precise matching of the sliding stroke of the lever 3323 with the rotation angle of the rotary switch 3321, enabling the user to visually determine the locking status of the filter 31 by observing the sliding distance of the lever 3323.

[0223] The specific shape of the long sliding hole 33213 can be finely adjusted as needed: for example, it can be designed to be slightly curved to perfectly match the precise arc trajectory of the pin 33231's rotation; or slopes or recesses can be set at both ends of the long sliding hole 33213 to enhance the positioning and tactile feel of the "unlock" and "lock" positions.

[0224] In one embodiment, such as Figure 32 and Figure 33 As shown, the pin 33231 is vertically movably slidably engaged with the elongated sliding hole 33213. This bidirectional sliding engagement between the pin 33231 and the elongated sliding hole 33213 accommodates both the circumferential rotation and axial lifting motion of the rotary switch 3321, ensuring that the operation of the lever 3323 is not interfered with by the lifting of the rotary switch 3321, thus improving structural compatibility and smoothness of movement. The vertical sliding design compensates for displacement changes during the lifting of the rotary switch 3321, preventing lateral forces between the pin 33231 and the elongated sliding hole 33213, reducing component wear, and extending service life. The bidirectional sliding engagement makes the structural design more flexible, eliminating the need for additional compensation components and simplifying the overall structure of the lifting module 332. The length of the pin 33231 needs to be determined based on the maximum lifting stroke of the rotary switch 3321.

[0225] In one embodiment, such as Figures 19-21 , Figure 27 and Figure 28 , Figure 32 and Figure 33As shown, the lever 3323 extends outward to the outside of the filter support assembly 33. The filter support assembly 33 has a guide hole 104 extending in a first direction. The lever 3323 slides in conjunction with the guide hole 104. The lever 3323 has a limiting groove 33232 that engages with the edge of the guide hole 104. The guide hole 104 guides the sliding direction of the lever 3323, ensuring precise operation. The engagement of the limiting groove 33232 with the edge of the guide hole 104 guides the sliding process of the lever 3323, preventing structural damage during the sliding process and avoiding the lever 3323 from detaching from the guide hole 104 and falling into or outside the housing 10, causing the lifting module 332 to malfunction. The external operation design avoids user contact with the internal components of the purifier, improving safety and preventing dust contamination of the internal components.

[0226] In one embodiment, such as Figures 18-30 As shown, the bottom frame 331 surrounds the lower purification outlet 3311 and has a second mounting part 3312 formed as a cylinder. The lifting module 332 is sleeved on the outside of the second mounting part 3312, and the tray 333 is located above the second mounting part 3312.

[0227] The second mounting part 3312 can be integrally formed with the bottom frame 331, or it can be assembled onto the bottom frame 331 as an independent component. Its height can be optimized according to the lifting stroke of the lifting module 332. The cylindrical second mounting part 3312 provides a coaxial mounting reference for the lifting module 332 and the tray 333, ensuring that the tray 333 is arranged horizontally around the lower purification outlet 3311, avoiding uneven clamping of the filter screen 31 due to the tilt of the tray 333, and improving the smoothness of the rotation of the filter screen 31. The lifting module 332 is sleeved on the outside of the second mounting part 3312, and the tray 333 is located above the second mounting part 3312, forming a layered nested layout with a compact structure. It makes full use of the space above the bottom frame 331, avoids obstructing the lower purification outlet 3311, and ensures ventilation efficiency. The cylindrical structure of the second mounting part 3312 enhances the rigidity of the bottom frame 331, improves the support capacity for the lifting module 332 and the tray 333, and extends the service life of the filter support assembly 33.

[0228] In one embodiment, such as Figures 22-30 As shown, the outer edge of the tray 333 is provided with a first flange 3331 extending downward, and a first receiving space 3301 for accommodating the lifting module 332 is defined between the first flange 3331 and the second mounting part 3312.

[0229] A first flange 3331 extending downwards is provided on the outer edge of the tray 333, which, together with the second mounting part 3312 of the central cylinder, defines a first receiving space 3301 for accommodating the lifting module 332. This achieves functional partitioning, concealment of the lifting module 332, and structural reinforcement of the tray 333.

[0230] The lifting module 332 is a mechanism that requires precise movement and should avoid contamination. Extending downwards through the first flange 3331 of the tray 333, it naturally encloses a ring-shaped semi-enclosed cavity with the outer wall of the fixed cylindrical second mounting portion 3312. The lifting module 332 is "stored" and "hidden" under the tray 333, physically isolating it from the filter 31 above.

[0231] Integrating the load-bearing surface of tray 333 with the lateral enclosure structure significantly enhances the rigidity of the tray 333's edges, preventing it from curling or deforming when subjected to off-center loads or rotational inertia forces from the filter screen 31. The gap between the flange and the second mounting part 3312 is precisely calculated to accommodate the lifting module 332 while also providing radial guidance or limiting, thus improving the overall stability of the tray 333's movement.

[0232] The bottom of the first flange 3331 can be designed with an outward-folding structure to further increase the strength of the structure of the contact part between the first flange 3331 and the bottom frame 331, and to avoid damage during the lifting and lowering of the tray 333.

[0233] The first flange 3331 and the second mounting part 3312 enclose a first accommodating space 3301, completely concealing the lifting module 332 beneath the tray 333. This provides enclosed protection for the lifting module 332, preventing dust, hair, and other foreign objects from entering and causing jamming, thus extending the component's lifespan. The enclosed accommodating space makes the purifier's internal structure cleaner and easier to clean and maintain. The first flange 3331 enhances the structural rigidity of the tray 333, improving its support for the filter 31 and preventing deformation of the tray 333 due to excessive force.

[0234] In one embodiment, such as Figures 18-23 , Figures 26-30 As shown, a ball assembly is provided between the tray 333 and the lifting module 332. The ball assembly includes multiple balls 334, and at least a portion of the multiple balls 334 are located at the angle between the first flange 3331 and the tray 333.

[0235] A ball bearing assembly is provided between the tray 333 and the lifting module 332, and at least a portion of the plurality of balls 334 are specifically arranged at the angle between the first flange 3331 and the tray 333. Rolling friction can be used instead of sliding friction.

[0236] Multiple balls 334 are introduced between the tray 333 and the lower lifting module 332, changing the relative motion between them from traditional surface contact sliding friction to point or line contact rolling friction. The rolling friction coefficient is usually much lower than that of sliding friction, which significantly reduces the frictional resistance that the tray 333 needs to overcome when rotating.

[0237] The ball bearings 334 are positioned at the internal angle formed by the first flange 3331 and the tray 333. This allows them to bear the vertical load of the tray 333, adapt to and facilitate its rotation through their own rolling motion, and also constrain its radial wobble to a certain extent. The distributed arrangement of multiple ball bearings 334 optimizes force and motion: Using multiple ball bearings 334 distributed circumferentially ensures that the supporting force on the tray 333 is uniform, discrete, and high-density. This avoids stress concentration, tray deformation, or rotational instability that could result from single-point or few-point support. The multiple ball bearings 334 together form a low-friction, high-precision "plane bearing," ensuring smooth rotation of the tray 333 even on imperfect support surfaces.

[0238] A retainer or segmented ball bearings 334 can be designed at the corners to precisely fix the position of each ball bearing 334 and prevent them from colliding with each other.

[0239] The ball bearing assembly transforms the sliding friction between the tray 333 and the lifting module 332 into rolling friction, significantly reducing the frictional resistance of the filter screen 31 during rotation, resulting in smoother rotation and reduced load and power consumption of the motor 3223. The balls 334 are positioned at the angle between the first flange 3331 and the tray 333, using the flange for limiting and preventing the balls 334 from falling off, thus improving the structural stability of the ball bearing assembly. Simultaneously, the even distribution of multiple balls 334 ensures more uniform force distribution on the tray 333, eliminating jamming during rotation. Rolling friction reduces component wear, extends the service life of the tray 333 and the lifting module 332, and reduces maintenance frequency. The lateral placement of the balls 334 solves the problem of decreased accuracy caused by deviations resulting from relying on a single ball 334 or spring connection to limit the tray 333 in traditional structures, providing better support and limiting effect, ensuring smooth rotation without deviation or vibration.

[0240] In one embodiment, such as Figures 18-30 As shown, a second flange 3332 extending downward is provided at the inner edge of the tray 333, and a second receiving space 3302 for receiving the sealing structure 32335 is defined between the second flange 3332 and the second mounting part 3312.

[0241] A second flange 3332 extending downwards is added to the inner edge of the pallet 333, which, together with the central cylindrical second mounting portion 3312, defines a second receiving space 3302 for accommodating the sealing structure 32335. The annular gap space formed between the second flange 3332 and the second mounting portion 3312 provides a protected, positionally defined mounting base for the flexible or elastic sealing structure 32335, preventing it from shifting, twisting, or falling off due to compression or friction during assembly or equipment operation. The second flange 3332 integrates the bearing surface of the pallet 333 with the inner ring sidewall, significantly enhancing the rigidity of the pallet 333 and preventing deformation of the inner ring of the pallet 333.

[0242] The second flange 3332 and the second mounting part 3312 enclose a second receiving space 3302, providing a stable installation position for the sealing structure 32335. This ensures that the sealing structure 32335 fits tightly against the tray 333 and the second mounting part 3312, improving the sealing performance of the lower purification outlet 3311. The sealing structure 32335 prevents unfiltered airflow from entering the lower air outlet 102 through the gap between the tray 333 and the second mounting part 3312, avoiding airflow short-circuiting and ensuring that all airflow is filtered by the filter screen 31, thus improving purification efficiency. The second flange 3332 enhances the structural rigidity of the inner ring of the tray 333, preventing the inner ring of the tray 333 from deforming under stress. It also protects the sealing structure 32335 from being crushed or damaged.

[0243] In one embodiment, such as Figure 18 , Figure 19 and Figures 27-30 As shown, the filter module 30 also includes an upper cover 336, which is located above the bottom frame 331. The upper cover 336 has a second opening 3361, through which the tray 333 passes and engages with the filter screen 31. In the first state, the tray 333 is at the same height as the upper cover 336.

[0244] The top cover 336 can be integrally formed with the bottom frame 331, or it can be connected as a separate component via clips or screws. Its material can be an easy-to-clean smooth plastic or a material with an antibacterial coating. The top cover 336 provides protection above the bottom frame 331, while also ensuring a smooth surface on the air duct wall defined above it. The second opening 3361 provides clearance for the lifting and lowering movement of the tray 333, ensuring that the tray 333 and the filter 31 do not interfere with each other. In the first state, the tray 333 and the top cover 336 are flush, creating a flat operating surface inside the purifier. The filter 31 can be smoothly slid in and out horizontally, avoiding jamming due to height differences and further improving the ease of replacement. The top cover 336 closes the upper part of the bottom frame 331, reducing the amount of foreign objects falling onto the structurally complex bottom frame 331 and improving the overall cleanliness of the appearance during filter installation.

[0245] The following describes the complete operation steps for replacing the filter 31 of the air purifier's filter module 30, with reference to the accompanying drawings.

[0246] Confirm the air purifier is powered off: Turn off the device's power switch. If the device is connected to an external power source, unplug the power cord to avoid the risk of electric shock during replacement. Clear the operating space: Ensure there are no obstructions around the purifier, especially in the area on the outside of the outer casing 10 corresponding to the lever 3323. Leave at least 5cm of operating space for the lever 3323 to slide smoothly. Prepare the new filter 31. Confirm that the new filter 31 is the compatible model. Check that the cylindrical structure of the filter 31 is intact and undamaged, and that its upper and lower mating surfaces are clean and free of foreign objects. Locate the lever 3323 extending outwards on the periphery of the purifier casing 10. The lever 3323 slides into the guide hole 104 of the outer casing 10, and the lever 3323 has a limiting groove 33232 that matches the edge of the guide hole 104. It is currently in the "locked position" by default, and the filter module 30 is in the second state.

[0247] Move lever 3323 to the unlock position, and push lever 3323 along the horizontal extension direction of guide hole 104, i.e., the first direction, until lever 3323 engages with the end hole on the other side of guide hole 104. At this time, lever 3323 is in the "unlock position".

[0248] When the lever 3323 is pushed, its vertical pin 33231 slides along the extension direction of the long sliding hole 33213, and drives the rotary switch 3321 to rotate, so that the rotary switch 3321 rotates to the "open position" around the second mounting part 3312 formed by the bottom frame 331 into a cylinder. The first groove on the lower surface of the rotary switch 3321 slides relative to the first protrusion 3313 of the bottom frame 331. Under the guidance of the first driving inclined surface 33131 on the first protrusion 3313, the rotary switch 3321 descends axially.

[0249] The second driving inclined surface 332121 on the upper surface of the rotating switch 3321 synchronously drives the slider structure 3322 to descend along the vertical guide rail of the bottom frame 331, eventually causing the tray 333 to descend to the first height along with the slider structure 3322, which is level with the height of the upper cover 336. The filter module 30 enters the first state, at which time the filter screen 31 can be moved freely in the horizontal direction for replacement.

[0250] Remove the old filter screen 31 horizontally. The filter screen 31 is sandwiched between the upper mating structure and the tray 333. Pull the filter screen 31 outward horizontally until it is completely detached from the lower area of ​​the upper mating structure and the support surface of the tray 333. Install the new filter screen 31 and push it horizontally between the upper mating structure and the tray 333. The lower end face of the filter screen 31 should fit the support surface of the tray 333. At this time, the filter screen 31 is in the "pre-installation position", and its central axis should be as coincident as possible with the central axis of the upper mating structure and the tray 333.

[0251] During the insertion process, the drive end structure of the top support component 32 may be located on the horizontal movement path of the filter 31. However, since the first transmission structure 3221 can move up and down a certain distance, the drive end structure may move upward under the drive of the filter 31 to avoid the filter 31. After moving to the pre-installation position, the drive end structure loses the constraint of the filter 31, moves downward, and engages with the filter 31. The user can determine whether the filter 31 is installed in the pre-installation position based on whether the drive end structure falls.

[0252] Move the lever 3323 in the reverse direction to the locked position until the limiting groove 33232 of the lever 3323 engages with the starting end hole of the guide hole 104. At this point, the lever 3323 cannot move further and is in the "locked position". The lever 3323 drives the pin 33231 to slide in the reverse direction, causing the rotary switch 3321 to rotate around the second mounting part 3312 to the "locked position". The first groove on the lower surface of the rotary switch 3321 slides along the first driving inclined surface 33131 of the first protrusion 3313 of the bottom frame 331. The lifting effect of the inclined surface causes the rotary switch 3321 to rise axially. The second driving inclined surface 332121 on the upper surface of the rotary switch 3321 pushes the slider structure 3322 to rise along the vertical guide rail. The tray 333 rises synchronously with the slider to the second height, and the filter screen 31 is clamped between the tray 333 and the upper mating structure to achieve circumferential limiting and axial fixing.

[0253] At this time, the ball bearing structure 325 contacts and engages with the lower surface of the cover 323, the filter module 30 enters the second state, and the filter screen 31 can rotate synchronously with the upper engaging structure.

[0254] To restore power to the device: Insert the power plug into socket 3121 or the insertion recess, and close the device power switch. The device will then enter standby mode.

[0255] The following is combined Figure 1 , Figure 5 , Figure 7 , Figures 34 to 46 The present invention describes a vacuum cleaner 40 according to an embodiment of the present invention. The vacuum cleaner 40 includes a vacuum housing 41, a vacuum tube 42, a negative pressure structure 43, a drive structure 46, and a seal 47. The dust collection housing 41 is fixed to the filter support structure, and a first opening is provided on the side wall of the dust collection housing 41.

[0256] The suction pipe 42 is rotatably disposed within the suction housing 41. The suction pipe 42 includes at least two sub-pipe segments arranged sequentially along the axial direction. Each sub-pipe segment is provided with a suction port 421. One end of the suction pipe 42 along the axial direction is provided with a dust outlet 422. The suction ports 421 on the at least two sub-pipe segments are arranged at different angles in the circumferential direction. There is a gap between the suction pipe 42 and the suction housing 41. The suction port 421 has a suction position communicating with the first opening and a sealing position that is offset from the first opening.

[0257] The negative pressure structure 43 is connected to the dust outlet 422.

[0258] The drive structure 46 is connected to the suction pipe 42 and is used to drive the suction pipe 42 to rotate so as to drive the suction ports 421 on at least two of the sub-pipe segments to communicate sequentially with the first opening.

[0259] The sealing element 47 is connected inside the vacuum housing 41 and rotates with the vacuum tube 42 to seal and divide the space into at least two sub-spaces, each of which corresponds to one of the tube segments.

[0260] The vacuum cleaner 40's suction pipe 42 employs a design with at least two sub-pipe sections arranged sequentially along the axial direction, allowing at least two suction ports 421 to clean different positions of the filter 31 in the circumferential direction. The drive structure 46 drives the suction pipe 42 to rotate, causing the suction ports 421 on the at least two sub-pipe sections to sequentially connect with the first opening. This allows different suction ports 421 to sequentially reach the suction position connected to the first opening, enabling the suction ports 421 to sequentially enter the working state. The other suction ports 421 are in a sealed position offset from the first opening. The suction port in the suction position is under the negative pressure of the negative pressure structure 43. The negative pressure generated under negative pressure can suck up and clean the dust and contaminants on the surface of the filter screen 31. Due to the setting of the sealing element 47, the space between the suction pipe 42 and the suction housing 41 is sealed and separated, preventing gas from flowing in the space and avoiding gas from flowing between the suction ports 421 that are not in the suction position. This ensures that most of the gas can only enter from the suction port 421 in the suction position and flow out from the dust outlet 422, avoiding the influence of the suction port 421 that is in the suction position and not working on the suction port 421 that is in the suction position and working on the suction position, and ensuring the suction effect of the suction pipe 42.

[0261] In a specific implementation, the suction port 421 is an elongated opening extending along the axial direction of the suction pipe 42. The suction port 421 can have a good negative pressure to facilitate the suction of dust and contaminants from the filter screen 31.

[0262] In a further embodiment, the filter 31 can move relative to the vacuuming device 40, and during the movement of the filter 31, the vacuuming device 40 can suck away dust and contaminants from different positions on the filter 31. In one embodiment, the filter 31 is rotatably disposed on the side of the vacuuming pipe 42, so that the filter 31 can be vacuumed by the corresponding vacuum port 421 in the circumferential direction. In another embodiment, the filter 31 can reciprocate relative to the vacuuming pipe 42 in the horizontal direction.

[0263] In one embodiment, the sealing element 47 is a sleeve, and the sleeve is provided with a communication port 471, which communicates with the first opening; there are at least two sleeves, and one sleeve is sealed around the outer periphery of each sub-pipe segment.

[0264] The connecting port 471 is connected to the first opening, ensuring that when the suction port 421 is rotated to the suction position, it can communicate with the surface of the filter screen 31 through the connecting port 471 and the first opening, so as to achieve better removal of dust and pollutants on the surface of the filter screen 31; and the sleeve structure is simple, easy to connect, and can also have a good sealing effect.

[0265] In one embodiment, the sub-tube segment has sealing flanges 423 protruding from both ends in the axial direction, and the sealing flanges 423 are rotatably engaged with the inner wall of the sleeve.

[0266] By setting the sealing flange 423, dust and gas can be prevented from running around randomly between the sub-pipe sections along the axial direction, and the contact area between the sleeve and the sub-pipe section can be reduced, thus reducing friction and ensuring the smooth rotation and stability of the suction pipe 42.

[0267] As an alternative implementation, the inner wall of the sleeve may be provided with annular protrusions at both ends in the circumferential direction, and the annular protrusions may be rotatably engaged with the outer peripheral wall of the suction pipe 42.

[0268] In one embodiment, the outer peripheral wall of the sub-pipe section is further provided with a rib 424, the rib 424 extends along the axial direction, and the two ends of the rib 424 are respectively connected to the two sealing flanges 423, and the rib 424 is rotatably engaged with the inner wall of the sleeve.

[0269] By setting the ribs 424, the strength of the sub-tube section can be increased, dust and gas can be prevented from flowing in the interval space along the circumferential direction, and the contact area between the sleeve and the sub-tube section can be reduced to reduce friction and ensure the smooth rotation and stability of the suction pipe 42.

[0270] As an alternative implementation, the inner wall of the sleeve may have annular protrusions at both ends in the circumferential direction, and the annular protrusions may be rotatably engaged with the outer peripheral wall of the suction pipe 42; the inner peripheral wall of the sleeve may also have a sealing protrusion, which extends along the axial direction and is connected at both ends to the two annular protrusions respectively, and the sealing protrusion may be rotatably engaged with the outer peripheral wall of the suction pipe 42.

[0271] In one embodiment, there are at least two ribs 424, and the at least two ribs 424 are distributed at circumferential intervals along the sleeve.

[0272] The ribs 424 are at least two in number, and the at least two ribs 424 are distributed at intervals along the circumference of the sleeve, which can provide better limiting and sealing effects in the circumferential direction.

[0273] In a preferred embodiment, the two ribs 424 are respectively disposed on both sides of the suction port 421, and preferably disposed near the suction port 421, which can have a better sealing effect.

[0274] In one embodiment, the sleeve is provided with a first connecting part 472, and the vacuum housing 41 is provided with a corresponding second connecting part, wherein the first connecting part 472 and the second connecting part are detachably connected.

[0275] The first connecting part 472 and the second connecting part are detachably connected, which facilitates the installation and removal of the sleeve and the suction pipe 42 in the suction housing 41.

[0276] In one embodiment, the vacuum housing 41 includes a first housing 413 and a second housing 414, which are detachably spliced ​​together. The second connecting part and the first opening are both provided on the first housing 413, and the second connecting part is provided near the first opening. The sleeve is provided with the first connecting part 472 at both ends in the axial direction, and the first connecting part 472 and the second connecting part are detachably inserted.

[0277] The detachable connection between the first housing 413 and the second housing 414 facilitates the installation and removal of the suction pipe 42 and the sleeve within the suction housing 41. The insertion of the first connecting part 472 on the sleeve with the second connecting part further simplifies the installation and removal of the suction pipe 42 and the sleeve.

[0278] In one embodiment, the outer peripheral wall of the sleeve is provided with a limiting sealing part 473. The limiting sealing part 473 has two sets, and the two sets of limiting sealing parts 473 are respectively arranged on both sides of the communication port 471 in the circumferential direction. The limiting sealing part 473 is in limiting contact with the dust collection housing 41.

[0279] By setting the limiting seal part 473, the gap between the sleeve and the dust collection housing 41 can be sealed to prevent airflow from flowing between the sleeve and the dust collection housing 41, thus avoiding the airflow from affecting the dust collection effect of the dust collection pipe 42; the sleeve can also be limited to facilitate the disassembly of the sleeve mounting box; and the setting of the limiting seal part 473 can also enhance the strength of the sleeve.

[0280] Alternatively, the limiting seal 473 may be provided on the dust collection housing 41.

[0281] In one embodiment, the limiting sealing part 473 protrudes from the outer peripheral wall of the sleeve, and the limiting sealing part 473 includes a first sealing strip 4731 and a second sealing strip 4732.

[0282] The first sealing strip 4731 extends along the axial direction of the sleeve, and the length of the first sealing strip 4731 in the axial direction is greater than the length of the connecting port 471 in the axial direction. One end of the second sealing strip 4732 is connected to the end of the first sealing strip 4731, and the other end extends away from the first sealing strip 4731 along the circumferential direction of the sleeve.

[0283] The first sealing strip 4731 can limit and seal in the axial direction, and the second sealing strip 4732 can limit and seal in the circumferential direction to achieve a better limiting and sealing effect, and the structure is relatively simple.

[0284] In one embodiment, the vacuuming device 40 further includes a first pressure plate 44 and a cleaning brush 45.

[0285] The first pressure plate 44 is connected to the first opening, and the first pressure plate 44 is provided with a second opening 441.

[0286] A cleaning brush 45 is movably connected inside the vacuum cleaner housing 41. The cleaning brush 45 includes a cleaning bracket 451 and a first brush body 452. The first brush body 452 is connected to the cleaning bracket 451. The first brush body 452 has an extended position that extends out of the vacuum cleaner housing 41 through the second opening 441 and a stored position that is stored inside the vacuum cleaner housing 41. When the vacuum port 421 is in the vacuuming position and the first brush body 452 is in the extended position, the first brush body 452 contacts the filter screen 31, and the first pressure plate 44 limits the cleaning bracket 451.

[0287] The drive structure 46 drives the cleaning brush 45 to move. When the first brush body 452 moves to the extended position, the suction port 421 is in the suction position. The first brush body 452 is correspondingly set and connected with the first opening 411, the second opening 441 and the suction port 421. At this time, the first brush body 452 contacts the filter screen 31. When the filter screen 31 and the first brush body 452 move relative to each other, the first brush body 452 cleans the filter screen 31 during the relative movement. The suction pipe 42 and the suction port 421 generate negative pressure under the negative pressure of the negative pressure structure 43, which can suck away the dust and contaminants cleaned by the first brush body 452, so as to remove stubborn dust and deep-seated dirt from the filter screen 31. The cleaning brush 45 is removed by removing the dust. Due to the setting of the first pressure plate 44, the air flow between the first opening 411 and the suction port 421 in the suction position can be guaranteed by the second opening 441. The cleaning brush 45 can also be limited so that when the cleaning brush 45 moves to the extension position under the drive of the drive structure 46, the first brush body 452 can extend normally from the first opening 411 and the second opening 441 to the outside of the suction housing 41. The first pressure plate 44 and the second opening 441 can also provide a ring-shaped limit for the cleaning bracket 451, ensuring the installation stability of the cleaning brush 45 and preventing the cleaning brush 45 from falling out of the suction housing 41 of the dust removal module.

[0288] In a specific embodiment, the negative pressure structure 43 includes a dust collection box 431 and an air pump 432. The dust inlet of the dust collection box 431 is connected to the dust outlet 422 of the suction pipe 42, and the air pump 432 is connected to the gas outlet of the dust collection box 431. Both the air pump 432 and the dust collection box 431 can be located at the bottom of the filter 31. In a preferred embodiment, the dust collection box 431 is located directly below the suction pipe 42.

[0289] In a further embodiment, the negative pressure structure 43 also includes a first connecting pipe 433, one end of which is connected to the dust inlet of the dust collection box 431, and the other end is connected to the dust outlet 422 of the suction pipe 42. The negative pressure structure 43 also includes a second connecting pipe 434, one end of which is connected to the gas outlet of the dust collection box 431, and the other end is connected to the air pump 432.

[0290] In a specific embodiment, the vacuum cleaner housing 41 includes a first housing 413 and a second housing 414, which are detachably connected, and a first opening 411 is provided on the first housing 413.

[0291] In one embodiment, the first pressure plate 44 is detachably connected to the first opening 411.

[0292] The first pressure plate 44 is detachably connected to the first opening 411, which facilitates the disassembly and installation of the cleaning brush 45.

[0293] As an alternative implementation, the first pressure plate 44 may be fixedly connected to the first opening 411, and the cleaning brush 45 may be installed on the side of the vacuum cleaner housing 41 facing away from the first opening 411.

[0294] In one embodiment, the vacuuming device 40 further includes a first latching portion 442 and a second latching portion 412.

[0295] The first snap-fit ​​portion 442 is disposed on the first pressure plate 44.

[0296] The second snap-fit ​​portion 412 is disposed on the vacuum housing 41 and located at the first opening 411, and the first snap-fit ​​portion is snapped into the second snap-fit ​​portion 412.

[0297] The engagement of the first snap-fit ​​part 442 and the second snap-fit ​​part 412 not only enables the installation and disassembly of the first pressure plate 44 and the first housing 413, but also simplifies the installation and disassembly steps, and facilitates the installation and disassembly of the cleaning brush 45.

[0298] In a specific embodiment, at least three first engaging portions 442 are spaced apart along the axial direction. The first engaging portions 442 at both ends can be slots or holes, and the first engaging portion 442 in the middle position can be a resilient buckle. The number and position of the second engaging portions 412 correspond to the first engaging portions 442. The second engaging portions 412 at both ends can be resilient buckles, and the second engaging portion 412 in the middle position can be slots or holes. Alternatively, at least three first engaging portions 442 are resilient buckles, and at least three second engaging portions 412 are corresponding to slots or holes. Alternatively, at least three first engaging portions 442 are slots or holes, and at least three second engaging portions 412 are corresponding to resilient buckles.

[0299] In one embodiment, the cleaning bracket 451 includes a bracket frame, the bracket frame having a third opening 453, the third opening 453 connecting the second opening 441 and the suction port 421 at the suction position; a limiting rib 454 protrudes from the outer side wall of the bracket frame; when the cleaning brush 45 is in the extended position, the first pressure plate 44 abuts against the limiting rib 454.

[0300] By setting the limiting rib 454, the limiting force of the first pressure plate 44 can be directly applied to the cleaning bracket 451 when the cleaning brush 45 is in the extended position, ensuring a stable limiting and fixing effect. The setting of the limiting rib 454 can also increase the strength of the cleaning bracket 451 and avoid excessive contact between the cleaning bracket 451 and the first pressure plate 44, reducing friction and motion interference.

[0301] In a specific implementation, there may be at least two cleaning brushes 45, and each cleaning brush 45 may have at least two limiting ribs 454 on its sidewall extending in the axial direction.

[0302] In this embodiment, the axial direction is the axial direction of the suction pipe 42, and also the length direction of the suction housing 41, the cleaning brush 45, and the first pressure plate 44.

[0303] In one embodiment, the drive structure 46 includes an elastic element 461 connected between the first pressure plate 44 and the cleaning bracket 451.

[0304] The elastic element 461 is connected between the first pressure plate 44 and the cleaning bracket 451. The first pressure plate 44 can provide a more stable positioning connection for the elastic element 461. Compared to related technologies where a small connecting piece is used to fix the elastic element 461 separately, in this embodiment, since the first pressure plate 44 is an integral structure with a second opening 441, it can both achieve annular limiting of the cleaning brush 45 and provide a more stable positioning connection for the elastic element 461. The elastic element 461 is used to apply an elastic force to the cleaning brush 45 to drive the cleaning brush 45 from the extended position to the retracted position.

[0305] In one embodiment, the elastic element 461 is a spring, and a first limiting post protrudes from the first pressure plate 44 toward the cleaning bracket 451. A second limiting post 455 is correspondingly provided on the cleaning bracket 451, and the two ends of the spring are respectively sleeved on the outer periphery of the first limiting post and the second limiting post 455.

[0306] The spring has a simple structure, making it easy to install on the first and second limiting posts 455 and easy to disassemble. It also has good elastic force to ensure the drive of the cleaning brush 45 when it moves from the extended position to the retracted position.

[0307] In a specific embodiment, the first pressure plate 44 is provided with a limiting plate protruding into the second opening 441, and the first limiting post protrudes from the limiting plate.

[0308] As an alternative implementation, the first pressure plate 44 may be provided with a first limiting groove 33232, the cleaning bracket 451 may be provided with a second limiting groove 33232, and the two ends of the elastic member 461 may be inserted into the first limiting groove 33232 and the second limiting groove 33232 respectively.

[0309] In one embodiment, the suction pipe 42 is provided with at least two suction ports 421 in sequence along the axial direction, the suction housing 41 is provided with at least two first openings 411, the first pressure plate 44 is provided with at least two second openings 441, and the cleaning brush 45 is provided with at least two. The number of suction ports 421, first openings 411, second openings 441 and cleaning brushes 45 are arranged in a one-to-one correspondence. Each second opening 441 is provided with a first limiting post at both ends in the axial direction, and each cleaning bracket 451 is provided with a second limiting post 455 at both ends in the axial direction. The axial direction is set at an angle to the moving direction of the cleaning brush 45.

[0310] The first pressure plate 44 is provided with at least two second openings 441, which can respectively limit the at least two cleaning brushes 45 in annular shape, ensuring that each cleaning brush 45 has a stable limiting effect and preventing any cleaning brush 45 from falling off the vacuum cleaner housing 41.

[0311] In a specific embodiment, the suction pipe 42 is rotatably disposed within the suction housing 41. The suction pipe 42 includes at least two sub-pipe segments arranged sequentially along the axial direction. Each sub-pipe segment is provided with a suction port 421, and one end of the suction pipe 42 along the axial direction is provided with a dust outlet 422. The suction ports 421 on the at least two sub-pipe segments are arranged at different angles in the circumferential direction. The driving structure 46 is used to drive the suction pipe 42 to rotate, so as to drive the suction ports 421 on the at least two sub-pipe segments to communicate sequentially with the first opening 411. The suction port 421 has a suction position communicating with the first opening 411 and a sealing position that is offset from the first opening 411. There are at least two cleaning brushes 45, and each sub-pipe segment is correspondingly provided with one cleaning brush 45. When the suction port 421 of a sub-pipe segment is in the suction position communicating with the first opening 411, the cleaning brush 45 corresponding to that sub-pipe segment is in the extended position, and the other cleaning brushes 45 are in the retracted position.

[0312] In a preferred embodiment, the axial direction is perpendicular to the moving direction of the cleaning brush 45.

[0313] In one embodiment, the drive structure 46 further includes a drive motor 462 and a transmission part 463.

[0314] The drive motor 462 is connected to one end of the vacuum housing 41 along the moving direction of the cleaning brush 45; the power output end of the drive motor 462 is connected to the vacuum pipe 42.

[0315] The transmission part 463 is disposed on the suction pipe 42 and is in transmission cooperation with the cleaning brush 45.

[0316] The drive motor 462 can directly control the rotation of the suction pipe 42 through the power output end to drive the suction port 421 on the suction pipe 42 to move to the suction position; or it can transmit the driving force of the drive motor 462 to the cleaning brush 45 through the transmission part 463 to drive the cleaning brush 45 to move from the storage position to the extension position; thus, when the suction port 421 of the suction pipe 42 is in the suction position, the transmission drives the cleaning brush 45 to the extension position, so as to clean the filter screen 31 through the cleaning brush 45. The negative pressure of the suction pipe 42 and the suction port 421 sucks away the dust and pollutants that have been cleaned, so as to remove the stubborn dust and deep-seated attachments on the filter screen 31.

[0317] In a specific implementation, the transmission part 463 is a cam structure.

[0318] In a specific embodiment, the vacuuming device 40 further includes a first fixing plate 48 and a second fixing plate 49. The first fixing plate 48 and the second fixing plate 49 are respectively connected to both ends of the vacuuming housing 41 along the axial direction. The drive motor 462 is connected to the first fixing plate 48. The second fixing plate 49 is provided with a connecting connector 491 that communicates with the dust outlet 422. The connecting connector 491 communicates with the negative pressure structure 43. The first fixing plate 48 is mounted on the top support assembly 32, specifically on the top frame 321. The second fixing plate 49 is mounted on the filter support assembly 33, specifically on the bottom frame 331.

[0319] As an alternative implementation, the drive structure 46 may also include a first motor 2211 and a second motor 2111, wherein the first motor 2211 is used to drive the suction pipe 42 to rotate, and the second motor 2111 is used to drive the cleaning brush 45 to move.

[0320] In one embodiment, the filter module 30 includes a filter screen 31 and a second brush body 310. The filter screen 31 is rotatably disposed on the side of the vacuuming device 40, and the second brush body 310 is connected to the surface of the filter screen 31. The second brush body 310 is used to clean the first brush body 452.

[0321] The filter 31 rotates, causing the second brush body 310 to rotate. When the second brush body 310 rotates to contact the first brush body 452, the first brush body 452 crosses the second brush body 310, and the second brush body 310 can clean the first brush body 452, thus achieving self-cleaning of the first brush body 452.

[0322] In a specific implementation, both the first brush body 452 and the second brush body 310 are brush bristles.

[0323] Alternatively, in other embodiments, the first brush body 452 is bristles and the second brush body 310 is teeth.

[0324] In a specific implementation, the sub-segments of the suction pipe 42 are named sequentially from top to bottom as the first segment, the second segment, ..., the Nth segment. The control method for the vacuuming device 40 includes: firstly, driving the suction pipe 42 to rotate via the drive structure 46, moving the suction port 421 of the first segment to the suction position, with the suction ports 421 of the second segment...the Nth segment all in a sealed position, and driving the cleaning brush 45 corresponding to the first segment to the extended position, with the cleaning brush 45 corresponding to the second segment...the Nth segment all in a retracted position. At this time, the filter 31 is rotated at least one revolution to clean the filter 31 corresponding to the first segment; then, the suction port 421 of the second segment is moved to the suction position, with the suction ports 421 of the first segment...the Nth segment all in a sealed position, and the cleaning brush 45 corresponding to the second segment...the Nth segment is driven to the retracted position. Brush 45 is moved to the extended position, and the cleaning brushes 45 corresponding to the first tube segment...the Nth tube segment are all in the retracted position. At this time, the filter screen 31 is rotated at least one revolution to clean the filter screen 31 corresponding to the second tube segment. This process is repeated until the suction port 421 of the Nth tube segment is moved to the suction position, and the suction ports 421 of the first tube segment, the second tube segment...are all in the sealed position. The cleaning brush 45 corresponding to the Nth tube segment is then driven to the extended position, and the cleaning brushes 45 corresponding to the first tube segment, the second tube segment...are all in the retracted position. At this time, the filter screen 31 is rotated at least one revolution to clean the filter screen 31 corresponding to the Nth tube segment. At this point, the cleaning of the filter screen 31 is complete.

[0325] In some embodiments, the air purifier further includes an odor removal module 50, which is disposed at the lower air outlet 102.

[0326] In a specific example, the deodorization module 50 is located at the lower air outlet 102, while the upper air outlet 101 is not equipped with the deodorization module 50. This design ensures that the air coming out of the upper air outlet 101 does not undergo additional purification and deodorization, thus maximizing the purification performance and working efficiency of the air purifier in deodorization mode.

[0327] In some embodiments, the deodorization module 50 includes a plasma generator 51, which can generate plasma by discharge to decompose odors in the air. The deodorization module 50 also includes an anti-overflow mesh cover 324, which is disposed on the side of the plasma generator 51 near the air outlet to prevent plasma from overflowing.

[0328] In the above embodiment, the plasma generator 51 generates high-density plasma, which catalytically degrades harmful gases through discharge. This deeply decomposes residual odors, formaldehyde, TVOCs, and other gaseous pollutants in the clean air to be discharged, completely eliminating odors. This overcomes the limitations of traditional filters 31, which primarily target particulate matter and have limited efficiency in removing gaseous pollutants, thus expanding the purification capabilities of the air purifier. The overflow shield 324, positioned on the side of the plasma generator 51 near the air outlet, effectively prevents excessive plasma overflow, thus improving air purification efficiency and odor removal efficiency. It also avoids potential safety hazards, such as user contact or interference with surrounding equipment, meeting safety regulations and ensuring product safety.

[0329] In some embodiments, the overflow shield 324 is a metal mesh and is connected to the ground wire. Through this design, the overflow shield 324, while intercepting plasma, provides an additional safe discharge channel by connecting to the ground wire. This allows any potentially accumulated static charge or accidental leakage current to be safely conducted to the ground, enhancing safety and further reducing the risk of electric shock or other safety issues caused by charge accumulation. This makes the deodorization module 50 operate more stably and reliably. Furthermore, the metal mesh itself has good conductivity and shielding properties, which can more effectively confine the plasma field.

[0330] Of course, in other alternative implementations, the spill containment mesh 324 can also be made of non-metallic materials, such as plastic mesh 324, to serve as a shield to prevent plasma spillage and provide safety protection.

[0331] In some embodiments, the plasma generating device 51 includes a mounting frame 511, an electrode mounting area is formed in the mounting frame 511, airflow can pass through the electrode mounting area, and an overflow protection mesh 324 shields and covers the electrode mounting area.

[0332] In the above embodiment, the mounting bracket 511 provides a stable positioning and mounting base for the electrodes. The airflow is guided through the electrode mounting area formed by the mounting bracket 511 and receives plasma treatment here, ensuring the stability and consistency of the discharge process, thereby guaranteeing the deodorization effect. The anti-overflow mesh cover 324 is precisely shielded on the side of the electrode mounting area near the air outlet. The anti-overflow mesh cover 324 specifically covers the core discharge area, achieving minimal interference to the airflow treatment effect while ensuring safety, and achieving a balance between safety and efficiency.

[0333] In some embodiments, the deodorization module 50 further includes an ozone reduction mesh 53, which is disposed between the overflow cover 324 and the air outlet.

[0334] In the above embodiment, the air after plasma treatment and overflow prevention mesh 324 passes through ozone reduction mesh 53 before being discharged, catalytically reducing any residual ozone to oxygen. This effectively avoids the leakage of trace amounts of ozone that may be generated by glow discharge, further improving the quality of the exhaust air, making the purification process more thorough and environmentally friendly, and eliminating users' concerns about ozone.

[0335] In some embodiments, the air inlet 100 is arranged around the middle of the air purifier; the upper air outlet 101 is located on the top surface of the air purifier; and the lower air outlet 102 is arranged around the bottom perimeter wall of the air purifier.

[0336] In the above embodiments, the air inlet 100, through its surrounding design, increases the effective air intake area, allowing more air to be purified to quickly enter the device. This provides a structural basis for achieving a large air volume and a high clean air output ratio, thereby improving the initial purification efficiency of the entire unit. Furthermore, by placing the upper air outlet 101 on the top surface of the outer casing 10, it facilitates the upward diffusion and natural downward flow of clean air, forming a gentle vertical airflow. The bottom circumferential air outlet design allows air to be delivered horizontally to the far end of the room. This combined upper and lower air outlet method creates a uniform and gentle airflow, completely avoiding discomfort caused by direct airflow onto the human body. It is particularly suitable for bedrooms, studies, and other scenarios where quietness and comfort are paramount. In one specific example, the top of the housing 10 is open and fitted with an air outlet grille 12 to form an upper air outlet 101. An air inlet 100 and a lower air outlet 102 surround at least three sides of the housing 10.

[0337] In some embodiments, the air inlets 100 are distributed on the back and two sides of the housing 10; the lower air outlets 102 are distributed on the back and two sides of the housing 10. In the above embodiments, by setting the air inlet 100 and the lower air outlet 102 on the back and two sides of the housing 10 instead of the front, the front panel does not need to have a functional air inlet 100 or air outlet, thus maintaining the aesthetic and clean appearance of the product. In order to facilitate the maintenance and replacement of the filter 31, deodorization module 50, etc. inside the air purifier, a large disassembly port needs to be opened on the housing 10. By setting the disassembly port on the back of the housing 10 and installing the air inlet grille 11 on the disassembly port, the structure can be hidden, making it convenient to disassemble and maintain the internal components of the housing 10. It can also serve as an air inlet 100 or air outlet for air intake and exhaust, while maintaining a complete and simple appearance, making it easier to integrate into home decoration styles and enhancing the aesthetic value of the product.

[0338] In some embodiments, the air purifier further includes a lower fan assembly 22, which is disposed at the bottom of the housing 10. The lower fan assembly 22 includes a first fan 221 and a first bracket 222 for mounting the first fan 221. A plasma generator 51 is installed on the outer periphery of the first bracket 222 and corresponds to the lower air outlet 102. The plasma generator 51 and the first bracket 222 enclose each other to form a lower air duct. The lower air duct connects the air inlet 100 and the lower air outlet 102. The first fan 221 is disposed in the lower air duct.

[0339] In the above embodiments, by integrating the deodorization module 50 with the lower fan assembly 22, the first bracket 222 not only fixes the fan but also serves as the duct wall and mounting base for the deodorization module 50, achieving modular and integrated design of functional components. This greatly saves internal space, making the overall layout more reasonable and compact, and increasing space utilization. Furthermore, by directly placing the plasma generator 51 inside the lower duct and facing the lower air outlet 102, it ensures that all air blown from the bottom passes through the plasma area, thereby guaranteeing the effectiveness and consistency of deodorization. Simultaneously, the design of the lower duct also helps reduce airflow resistance, ensuring smooth airflow and volume.

[0340] Specifically, the first fan 221 includes a first motor 2211 and a first fan blade 2212. The first motor 2211 and the first fan blade 2212 are connected. The first motor 2211 can drive the first fan blade 2212 to rotate, so as to drive the air entering from the air inlet 100 to flow down the air outlet 102 along the first air duct. The first motor 2211 is detachably installed and fixed in the first bracket 222, and the first fan blade 2212 is installed on the output shaft above the first motor 2211. The plasma generator 51 has a discharge gap for airflow. When the plasma generator 51 is installed on the first bracket 222, the plasma generator 51 is located on the airflow path from the air inlet 100 to the lower air outlet 102, and the plasma generator 51 has a discharge gap for airflow and discharge purification.

[0341] In some embodiments, the lower air outlet 102 is distributed on at least two sides of the housing 10; at least two sets of plasma generating devices 51 are provided, and the at least two sets of plasma generating devices 51 are arranged on at least two sides of the first bracket 222 corresponding to the lower air outlet 102; the at least two sets of plasma generating devices 51 and the first bracket 222 enclose a lower air duct that is closed at the bottom, draws air at the top, and discharges air from at least two sides. In the above embodiment, the lower air outlet 102 adopts a design with air outlets on at least two sides, which makes the bottom air supply direction wider, can push clean air to fill the entire bottom space of the room more quickly, reduce purification dead corners, improve air replacement efficiency, and achieve multi-directional and uniform bottom air outlet. Furthermore, plasma generators 51 are configured in multiple air outlet directions, ensuring effective odor decomposition regardless of the direction of airflow, thus achieving full coverage of odor removal in the bottom air outlet area and significantly enhancing the product's ability to cope with complex odor environments. In addition, the "closed bottom, suction top, multi-directional air outlet" duct structure formed by the plasma generator 51 and the first support 222 is highly efficient and reasonable, conforming to the working characteristics of a centrifugal fan, effectively guiding airflow, gathering purified air from the middle, and uniformly pressing it out from multiple directions.

[0342] In one specific example, the deodorization module 50 is plugged into the first bracket 222 for easy disassembly and maintenance.

[0343] In a specific example, the lower air outlet 102 is provided on three sides of the housing 10, the mounting bracket 511 is provided with three flow openings 2220, and the plasma generator 51 has three sets. The three sets of plasma generators 51 are installed at the three flow openings 2220 to catalytically degrade harmful gases, odors, etc. in the air flowing through the flow openings 2220 through discharge.

[0344] In some embodiments, the first support 222 is a frame structure, and an overflow opening 2220 is provided on one side of the first support 222 corresponding to the lower air outlet 102. A first slot 2221 is formed on the first support 222, and the plasma generator 51 is inserted into the first slot 2221, corresponding to the overflow opening 2220. A second slot is also formed on the first support 222, and the second slot is located between the first slot 2221 and the lower air outlet 102. An overflow guard 324 is inserted into the second slot, and both the plasma generator 51 and the overflow guard 324 can allow airflow to pass through.

[0345] In the above embodiment, the frame-type first bracket 222 adopts a first slot 2221 design, which facilitates the plug-and-play installation of the plasma generator 51 as an independent module on the first bracket 222. This not only ensures a stable and reliable connection but also greatly simplifies the production and assembly process, making it easier for users or maintenance personnel to replace or maintain the plasma generator 51, reducing after-sales service costs, and facilitating production and maintenance. Furthermore, the design of the first slot 2221 and the second slot enables precise positioning, ensuring the accuracy and consistency of the installation positions of the plasma generator 51 and the overflow guard 324, so that its air outlet surface is precisely aligned with the flow opening 2220 on the bracket, ensuring smooth airflow.

[0346] Furthermore, along the airflow direction, the plasma generator 51, the metal mesh cover 52, and the ozone reduction mesh 53 are arranged sequentially. The first support 222 is provided with a second slot and a third slot for installing the metal mesh cover 52 and the ozone reduction mesh 53. The metal mesh cover 52 and the ozone reduction mesh 53 are slidably installed in the second and third slots from the sides of the first support 222. This design facilitates the disassembly and maintenance of the metal mesh cover 52 and the ozone reduction mesh 53.

[0347] In some alternative embodiments, two sets of partition ribs can be provided in the first slot 2221 of the first bracket 222 to divide it into three slots, which are respectively used to install the plasma generator 51, the metal mesh cover 52, and the ozone reduction mesh 53. Alternatively, a second slot and a third slot can be separately constructed on the side of the first slot 2221 near the lower air outlet 102.

[0348] In some embodiments, the plasma generating device 51 includes a mounting frame 511 and a plurality of electrode structures 512, the plurality of electrode structures 512 being arranged at intervals on the mounting frame 511 along the length direction of the mounting frame 511; there is a discharge gap between two adjacent electrode structures 512 and between the electrode structure 512 and the mounting frame 511 for gas flow.

[0349] In the above embodiment, a large plasma generation area can be formed by multiple electrode structures 512 spaced apart along the length of the mounting frame 511, increasing the plasma reaction area and improving processing efficiency. Furthermore, the multiple electrode structures 512 allow airflow to pass through these dense discharge gaps as it flows from the air inlet 100 to the air outlet 102, increasing the probability and time for pollutants to collide with high-energy plasma, resulting in more complete and efficient odor decomposition. In addition, the design of the discharge gaps allows airflow to pass through normally, avoiding excessive resistance to the air duct caused by overly dense structures, which could affect the overall airflow.

[0350] In some embodiments, the air purifier further includes an upper fan assembly 21, which is disposed at the top of the housing 10 and is used to drive external air to flow from the air inlet 100 to the air outlet 101.

[0351] In the above embodiments, the upper fan assembly 21 and the lower fan assembly 22 together constitute a dual-fan drive system. The two fans can independently control the wind speed and start / stop, providing a hardware foundation for realizing multiple purification modes, such as air outlet only from the top, air outlet only from the bottom, air outlet from both top and bottom at the same time, strong mode, sleep mode, etc., greatly enhancing the product's functional diversity and scenario adaptability.

[0352] In some embodiments, the filter 31 is disposed in the middle of the housing 10 corresponding to the air inlet 100; the top and bottom of the filter module 30 are respectively formed with an upper purification outlet 3230 and a lower purification outlet 3311, the upper fan assembly 21 is disposed between the upper purification outlet 3230 and the upper air outlet 101, and the lower fan assembly 22 is disposed between the lower purification outlet 3311 and the lower air outlet 102; after the outside air enters the housing 10 through the air inlet 100, it is filtered by the filter module 30 and flows to the upper fan assembly 21 and the lower fan assembly 22 from the upper purification outlet 3230 and the lower purification outlet 3311, respectively. The HEPA filter 31 is disposed on the inner periphery of the activated carbon filter 31, and the filter 31 is detachably installed in the housing 10. By integrating the HEPA high-efficiency particulate air filter 31 and the composite activated carbon filter 31 into one unit, an independently replaceable cylindrical unit is formed and detachably installed in the housing 10, effectively solving the resource waste problem of the traditional integrated filter 31 requiring overall replacement due to partial failure.

[0353] In some embodiments, the upper fan assembly 21 includes a second fan 211, a second bracket 213 for mounting the second fan 211, and an upper air duct 212; the inlet end of the upper air duct 212 is connected to the upper purification outlet 3230 of the filter module 30, and the outlet end is connected to the upper air outlet 101; the second fan 211 is disposed inside the upper air duct 212; the second bracket 213 is installed on the side of the upper air duct 212 away from the filter module 30.

[0354] Specifically, the second fan 211 includes a second motor 2111 and a second fan blade 2112. The second motor 2111 is connected to the second fan blade 2112 and can drive the second fan blade 2112 to rotate, so that the airflow flows from the air inlet 100 to the air outlet 101.

[0355] In some embodiments, such as Figure 7 , Figure 7 As shown, the air purifier also includes an ultraviolet sterilization module 60, which is disposed inside the outer casing 10 and is used to sterilize the filter module 30 with ultraviolet light. The ultraviolet sterilization module 60 irradiates the filter module 30 with ultraviolet light, killing bacteria, viruses, and other microorganisms attached to the filter screen 31. This effectively inhibits bacterial growth, significantly reduces the risk of microbial contamination of the filter screen 31, ensures users are protected from secondary pollution, and improves the hygiene level and health protection of the air outlet. By integrating purification and sterilization functions, the product can address more complex indoor air quality issues, such as particulate matter and microbial pollution, meeting users' higher demands for a healthy breathing environment and enhancing the product's overall competitiveness and market appeal.

[0356] In some embodiments, the ultraviolet sterilization module 60 includes a lamp holder 62 and an ultraviolet lamp 61. The lamp holder 62 extends along the length direction of the filter 31, and the extension length is not less than the length of the filter 31. There are multiple ultraviolet lamps 61, which are arranged at intervals along the length direction of the lamp holder 62, and the irradiation range of the multiple ultraviolet lamps 61 in the height direction of the filter 31 covers the filter 31.

[0357] In the above embodiment, by setting the length of the lamp holder 62 to be no less than the length of the filter 31, and using multiple ultraviolet lamps 61 arranged at intervals along its length, the irradiation range of the multiple ultraviolet lamps 61 in the height direction of the filter 31 covers the filter 31, ensuring that the ultraviolet light can cover the entire effective filtration height of the filter 31, avoiding the problem of incomplete sterilization in local areas of the filter 31 due to insufficient irradiation length, ensuring that the filter 31 is sterilized longitudinally without dead angles, and the interval arrangement of multiple lamp beads can form a continuous and uniform ultraviolet light field on the surface of the filter 31. Combined with the rotation of the filter 31, every point of the filter 31 can receive a sufficient amount of ultraviolet radiation dose, thereby greatly improving the reliability and uniformity of sterilization.

[0358] In some embodiments, the filter support structure further includes an intermediate support frame 34 disposed between the filter support assembly 33 and the top support assembly 32. The filter support assembly 33, the top support assembly 32, and the intermediate support frame 34 together enclose a filter installation space for accommodating the filter 31. The filter support assembly 33 and the top support assembly 32 are respectively provided with axial mounting grooves. The two ends of the lamp holder 62 are respectively inserted into the axial mounting grooves of the filter support assembly 33 and the top support assembly 32 and fixed by screws. In the above embodiments, by placing the lamp holder 62 within the axial mounting grooves on the filter support assembly 33 and the top support assembly 32 respectively, it can be ensured that the lamp holder 62 and the filter 31 are coaxially installed, reducing eccentricity. Furthermore, the lamp holder 62 is initially positioned by first inserting both ends into the axial mounting grooves, and then secured with screws, ensuring precise alignment and mechanical strength of the connection, preventing displacement due to vibration, and thus guaranteeing the stability of the sterilization effect of the ultraviolet sterilization module 60.

[0359] In some specific embodiments, there are two intermediate support frames 34, which are arranged opposite to each other. The intermediate support frames 34 are frame-shaped. The upper end of the frame-shaped intermediate support frame 34 is connected and fixed to the top support assembly 32, and the lower end of the frame-shaped intermediate support frame 34 is connected and fixed to the filter support assembly 33. The lamp holder 62 is installed between the two intermediate support frames 34.

[0360] In some embodiments, the air purifier further includes a negative ion generator 214, which is mounted on the second bracket 213. The negative ion generator 214 can adsorb any residual particulate matter in the air passing through the upper air duct 212 by generating negative ions, thereby further purifying the air.

[0361] The air purifier proposed in this application mainly consists of a shell 10, an air inlet grille 11, a filter module 30, an ultraviolet sterilization module 60, a dust collection device 40, an upper fan assembly 21, and a lower fan assembly 22. This purifier employs a dual centrifugal fan system, with the two fans respectively placed in the upper air duct 212 and the lower air duct. An annular air inlet 100 is provided on the air inlet grille 11 of the shell 10, forming a purification method of central air intake and top and bottom air exhaust. After purification, part of the air is blown upwards by the upper fan assembly 21, and the other part is blown downwards by the lower fan assembly 22 and discharged from all sides, ultimately forming the following configuration: Figure 4 The diagram shows a "surrounding" airflow path. Compared to traditional top and bottom air intake and center air exhaust methods, this solution avoids the problem of dust or foreign objects being easily drawn in when air is intaked from the ground, leading to filter 31 clogging, performance degradation, and shortened lifespan. Furthermore, common center air exhaust designs tend to create a noticeable direct airflow sensation, which can easily disturb users in quiet environments such as sleeping or working. The surrounding airflow formed by the center intake and top and bottom exhaust of this solution effectively eliminates the discomfort of direct airflow, allowing users to enjoy uniformly flowing clean air without feeling it while achieving purification, thus enhancing the user experience.

[0362] Furthermore, a filter module 30 integrating a HEPA high-efficiency particulate air filter 31 and a composite activated carbon filter 31 is installed at the air inlet 100. The composite activated carbon filter 31 is placed inside the HEPA filter 31, together forming a cylindrical, independently replaceable filter unit. This design allows users to replace the failed filter 31 section individually, avoiding the need for complete replacement of the entire filter 31 due to partial failure in traditional integrated composite filters, thereby reducing maintenance costs and resource waste. At the same time, the central air intake and top-bottom air outlet layout only requires a single filter 31 in the middle of the unit, making filter replacement and cleaning more convenient. In contrast, if a top-bottom air intake and central air outlet design were used, two sets of pre-filters would need to be installed at the top and bottom air inlets 100, increasing maintenance complexity and costs.

[0363] Furthermore, the central air intake and top-bottom air outlet structure helps to expand the functions of the air purifier. To avoid the filter 31 becoming clogged and bacteria accumulating due to centralized purification at the air inlet 100, thus affecting its service life, this embodiment preferably employs filter 31 self-cleaning technology and ultraviolet sterilization module 60 to centrally maintain the central filter 31, achieving the self-cleaning and sterilization functions of the filter 31. In contrast, the top-bottom air intake and central air outlet structure, with its dispersed filter element arrangement at the air inlet 100, makes it difficult to achieve the aforementioned centralized maintenance function.

[0364] This embodiment utilizes a top support assembly 32 above the filter screen 31 and a filter screen support assembly 33 below it to facilitate centralized maintenance of the air inlet filter screen 31. The two support assemblies are connected by two intermediate support frames 34, which bear the main weight of the entire unit. The top support assembly 32 is driven by a stepper motor to rotate the filter screen 31, which is fixed and pre-tightened to it; the filter screen support assembly 33 serves as a base, providing a platform for the filter screen 31 to rotate freely and support manual lifting. The user can control the filter screen 31 to rise by moving the lever 3323, fixing it to the top support assembly 32 for rotation, and move the lever 3323 in the opposite direction to lower the filter screen 31 for easy removal.

[0365] Furthermore, the self-cleaning function of the filter 31 is achieved by the vacuuming device 40, which also includes a vacuuming base 400. The vacuuming base 400 integrates a vacuuming motor, a ventilation pipe, and a dust collection box 431. The vacuuming housing 41 is equipped with a segmented, retractable brush head. The vacuuming base 400 is fixed to the bottom of the filter support assembly 33 by clips and screws. When the air purifier enters the self-cleaning mode, under the negative pressure environment provided by the vacuuming motor, the vacuuming housing 41 and its segmented, retractable brush head can vacuum the outer surface of the rotating filter 31 layer by layer. The dust is collected in the dust collection box 431 for convenient centralized disposal by the user. In the sterilization mode, the ultraviolet sterilization module 60, which is connected between the top support assembly 32 and the filter support assembly 33 by screws, can irradiate the rotating filter 31 360°, effectively inhibiting bacterial growth, reducing the risk of microbial contamination, improving purification efficiency, and reducing secondary pollution.

[0366] Furthermore, this embodiment also includes a four-in-one sensor on the upper fan assembly 21 and a formaldehyde sensor 14 on the outer casing 10. The formaldehyde sensor 14 and the four-in-one sensor work together to monitor air quality in real time, enabling the purifier to dynamically adjust the purification mode according to different environments, thereby improving purification efficiency. Preferably, an outer cover plate 13 is provided on the back of the outer casing 10, and the formaldehyde sensor 14 is integrated on the outer cover plate 13. The top of the outer cover plate 13 is limited by the ribs on the side of the upper air duct 212, and the bottom of the outer cover plate 13 is fixed to the bottom of the filter top support assembly 32 by buckles and screws.

[0367] Furthermore, the air purifier also includes a support base 80, which supports the entire unit. The lower fan assembly 22 is connected to the vacuum base 400 below by screws and clips, and fixed above the support base 80. The support base 80 is equipped with casters at the bottom, facilitating the movement of the purifier to different positions. The first bracket 222 is fixed to the base with screws, and a bottom light assembly 90 is installed at its bottom via clips. The bottom light assembly 90 includes a light strip bracket 91 and a bottom ambient light strip 92. The bottom ambient light strip is embedded in the groove of the light strip bracket 91 and adopts an adjustable warm light design to avoid glare at night and optimize the user experience. The first fan 221 is installed inside the first bracket 222, and three flow openings 2220 are opened around its perimeter. Each flow opening 2220 has a specific slot for installing the deodorization module 50. The deodorization module 50 consists of three plasma generators 51, three metal mesh covers 52, and three ozone reduction meshes 53. It can efficiently decompose and neutralize TVOCs, odors, and other organic pollutants in the air passing through the lower air outlet 102. The plasma generators 51 produce high-density plasma, which catalyzes the degradation of harmful gases. The metal mesh covers 52 are located between the ozone reduction meshes 53 and the plasma generators 51, and are grounded to prevent plasma leakage. The outermost ozone reduction meshes 53 prevent excessive ozone from escaping due to glow discharge.

[0368] Furthermore, the upper fan assembly 21 is fixed above the top support assembly 32 with screws. The upper fan assembly 21 includes an upper air duct 212, a second bracket 213, and a second fan 211. The second fan 211 is installed below the second bracket 213, and a display module 70 is installed above it. The display module 70 includes an indicator light, a lampshade, a lamp holder, an air quality light, and a lamp frame. The air quality light is embedded in the groove of the lamp frame and uses a ring-shaped LED matrix to dynamically display key indicators such as PM2.5 and formaldehyde in real time, allowing users to intuitively understand air quality and purification effects without the need for a screen or APP. A crystal lamp ball is mounted on the lamp holder, and a color display screen is integrated on its top for easy user operation of the entire unit. The crystal material forms a soft halo under the light, enhancing the product's visual style. In another embodiment, a lifting crystal lamp ball design can be adopted, which automatically rises when the unit is turned on and automatically lowers when it is turned off, enhancing aesthetics while giving users a sense of ritual in intelligent interaction.

[0369] Furthermore, to ensure the deodorization effect, the airflow through the deodorization module 50 needs to reach an appropriate air volume. When the purifier is in deodorization mode, the air volume at the lower air outlet 102 can be controlled by the first fan 221 to maintain an ideal air volume. At this time, the second fan 211 can still adjust the air volume at the upper air outlet 101 to continue purifying the air, thereby maximizing the purification performance and working efficiency of the whole machine in deodorization mode. When switching to normal purification mode, the deodorization module 50 can be turned off, and the speed of the two fans can be adjusted separately to achieve rapid purification.

[0370] The air purifier provided in this application expands its adaptability to multiple scenarios by integrating odor removal functionality. Based on the airflow path, it innovatively integrates a plasma generator 51, a metal mesh cover 52, and an ozone reduction mesh 53 to form an odor removal module 50. This module dynamically switches to odor removal mode according to environmental needs and works in conjunction with the first fan 221, automatically adjusting the airflow to the optimal state for efficient decomposition of TVOCs and odors. Simultaneously, the second fan 211 maintains basic purification efficiency, achieving efficient and safe odor removal and significantly improving the device's applicability and user experience in odorous environments. While ensuring the air purifier's performance, this application expands its diverse functions and purification modes, enhancing its reliability and adaptability in various application scenarios to meet different user needs and improve the user experience.

[0371] Although embodiments of the present 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 present invention, and such modifications and variations all fall within the protection scope of the embodiments of this application.

Claims

1. An air purifier, characterized in that, include: The outer casing (10) is provided with an air inlet (100) and an air outlet; A filter module (30) is disposed on the airflow path between the air inlet (100) and the air outlet. The filter module (30) includes a filter screen (31) and a filter screen support structure. A filter screen installation space is formed in the filter screen support structure. The filter screen (31) is rotatably disposed in the filter screen installation space. A rotary drive device (322) is installed on the top of the filter support structure and cooperates with the filter (31) to drive the filter (31) to rotate; A vacuuming device (40) is installed on the filter support structure and located on one side of the filter (31) for cleaning the filter (31).

2. The air purifier according to claim 1, characterized in that, The filter support structure includes: The top support assembly (32) includes a fixedly mounted top frame (321), and the rotation drive device (322) is mounted on the top frame (321); The filter support assembly (33) includes a tray (333) and a fixed bottom frame (331), the tray (333) rotating relative to the bottom frame (331), and the filter (31) positioned above the tray (333).

3. The air purifier according to claim 2, characterized in that, The rotary drive device (322) includes a drive assembly and a transmission assembly; The transmission assembly includes a first transmission structure (3221) rotatably disposed above the top frame (321), and the drive assembly is used to drive the first transmission structure (3221) to rotate around the pivot (3231). The filter screen (31) is disposed between the first transmission structure (3221) and the tray (333) and rotates synchronously with the first transmission structure (3221).

4. The air purifier according to claim 3, characterized in that, The top frame (321) has a first opening (3211), the transmission body (32213) of the first transmission structure (3221) is arranged around the first opening (3211), and the outer peripheral surface of the transmission body (32213) of the first transmission structure (3221) is formed as a transmission part (463). The drive component and the transmission part (463) drive the first transmission structure (3221) to rotate.

5. The air purifier according to claim 4, characterized in that, The drive component is located above the top frame (321) and is positioned to avoid the first opening (3211).

6. The air purifier according to any one of claims 1 to 5, characterized in that, The vacuuming device (40) includes: The vacuum cleaner housing (41) is fixed on the filter support structure, and a first opening (411) is provided on the side wall of the vacuum cleaner housing (41). A suction pipe (42) is rotatably disposed within the suction housing (41). The suction pipe (42) includes at least two sub-pipe segments arranged sequentially along the axial direction. Each sub-pipe segment is provided with a suction port (421). One end of the suction pipe (42) along the axial direction is provided with a dust outlet (422). The suction ports (421) on the at least two sub-pipe segments are arranged at different angles in the circumferential direction. There is a gap between the suction pipe (42) and the suction housing (41). The suction port (421) has a suction position communicating with the first opening (411) and a sealing position that is offset from the first opening (411). The negative pressure structure (43) is connected to the dust outlet (422); A drive structure (46) is connected to the suction pipe (42) and is used to drive the suction pipe (42) to rotate so as to drive the suction ports (421) on at least two of the sub-pipe segments to communicate sequentially with the first opening (411); A sealing element (47) is connected inside the vacuum housing (41) and rotates with the vacuum tube (42) to seal and divide the space into at least two sub-spaces, each of which corresponds to a sub-tube segment.

7. The air purifier according to claim 6, characterized in that, The sealing element (47) is a sleeve, and the sleeve is provided with a communication port (471), which is connected to the first opening (411); there are at least two sleeves, and one sleeve is sealed around the outer periphery of each sub-pipe segment.

8. The air purifier according to claim 7, characterized in that, The sub-tube section has sealing flanges (423) protruding from both ends in the axial direction, and the sealing flanges (423) are rotatably engaged with the inner wall of the sleeve.

9. The air purifier according to claim 8, characterized in that, The outer peripheral wall of the sub-pipe section is also provided with a rib (424), the rib (424) extends along the axial direction, and the two ends of the rib (424) are respectively connected to the two sealing flanges (423). The rib (424) is rotatably engaged with the inner wall of the sleeve.

10. The air purifier according to claim 9, characterized in that, The ribs (424) are at least two in number, and the at least two ribs (424) are distributed at circumferential intervals along the sleeve.

11. The air purifier according to any one of claims 1 to 5, characterized in that, The air inlet (100) is located in the middle of the outer casing (10); The air outlet includes an upper air outlet (101) disposed on the top of the housing (10) and a lower air outlet (102) disposed on the bottom of the housing (10).

12. The air purifier according to claim 11, characterized in that, The air purifier also includes: The upper fan assembly (21) is located at the top inside the housing (10) and is used to drive external air to flow from the air inlet (100) to the upper air outlet (101); The lower fan assembly (22) is located at the top inside the housing (10) and is used to drive external air to flow from the air inlet (100) to the lower air outlet (102); The filter module (30) is located between the upper fan assembly (21) and the lower fan assembly (22), and the top and bottom of the filter module (30) are respectively formed with an upper purification outlet (3230) and a lower purification outlet (3311). The upper fan assembly (21) is disposed between the upper purification outlet (3230) and the upper air outlet (101), and the lower fan assembly (22) is disposed between the lower purification outlet (3311) and the lower air outlet (102).

13. The air purifier according to claim 12, characterized in that, The air purifier also includes: The deodorization module (50) is located at the lower air outlet (102). The deodorization module (50) includes a plasma generator (51), which can generate plasma by discharge to decompose odors in the air.

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