Filtering device and air purifier

Abstract

The invention relates to the technical field of air purification equipment, and discloses a filtering device and an air purifier.The filtering device comprises a top supporting assembly, a bottom supporting assembly and a filter screen body, and the top supporting assembly is provided with a rotatable upper matching structure; the bottom supporting assembly is provided with a lifting module and a tray which is arranged above the lifting module and moves relative to the lifting module; the filter screen main body is arranged between the tray and the upper matching structure; the filtering device has two states, the first state is that the tray is located at the low position so that the filter screen body can move horizontally, and the second state is that the tray ascends so that the filter screen body can be clamped between the tray and the upper matching structure, through the dual-state switching design, the filter screen replacement convenience and the working state stability are both considered, and the problem that a traditional filter screen is tedious to replace is thoroughly solved; smooth operation of the filter screen is ensured, power transmission is stable, power loss and noise are reduced, operation is simple, and usability of products is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of air purification equipment technology, specifically to a filtration device and an air purifier. Background Technology

[0002] The filters in existing air purifiers are directly mounted on a rotating tray, leaving little space for filter replacement. This makes replacement inconvenient, cumbersome, and requires a high level of user skill. Furthermore, the filters are not very stable, easily loosening and shifting during operation, resulting in low power transmission efficiency and negatively impacting the user experience. Summary of the Invention

[0003] This invention provides a filtration device and an air purifier to solve the technical problems of unstable filter settings and inconvenient replacement in existing air purifiers.

[0004] In a first aspect, the present invention provides a filtration device, comprising: a top support assembly including a rotatably disposed upper mating structure; a bottom support assembly including a lifting module and a tray disposed above the lifting module and having relative movement with the lifting module; and a filter body disposed between the tray and the upper mating structure; wherein the filtration device includes a first state and a second state, in the first state, the tray is located at a first height, and the filter body is movably disposed between the upper mating structure and the tray in a horizontal direction; in the second state, the tray is raised to a second height under the drive of the lifting module, and the filter body is sandwiched between the upper mating structure and the tray.

[0005] Beneficial Effects: The filtration device features a dual-state switching design, balancing convenient filter replacement with operational stability. In the first state, the tray is in a low position, allowing the filter body to move freely horizontally. This enables quick and easy placement and removal without disassembling other parts, completely solving the cumbersome problem of traditional filter replacement. In the second state, the tray rises, clamping the filter body between the upper fitting structure and the tray, forming a stable clamping position. This prevents displacement and eccentricity during filter rotation, ensuring smooth operation. With the filter body clamped, the rotational drive force is transmitted more stably, avoiding power loss and noise caused by a loose filter. The dual-state switching is driven by a lifting module, eliminating the need for manual pressing or locking, simplifying operation and significantly improving product usability.

[0006] In one alternative implementation, the bottom support component includes: The bottom frame is fixedly installed and has a lower purification outlet formed on it. The tray is arranged around the lower purification outlet, and the lifting module is set between the tray and the bottom frame.

[0007] Beneficial effects: The bottom frame provides a rigid mounting reference for the tray and lifting module, ensuring that the driving force of the lifting module is stably transmitted to the tray, avoiding tilting or jamming during lifting, and improving the coaxiality of the filter body clamping. The tray surrounds the lower purification outlet, not obstructing the exhaust channel of the filtered clean airflow, ensuring the ventilation efficiency of the lower air outlet, and at the same time ensuring that the bottom of the filter body is evenly stressed, preventing excessive local pressure from causing filter deformation. The lifting module is hidden between the tray and the bottom frame, optimizing the space layout, making the bottom support component structure compact, reducing the space occupied inside the purifier, and facilitating the miniaturization of the entire unit.

[0008] In one alternative implementation, the lifting module includes: A rotary switch is movably positioned above the bottom frame between an open position and a locked position. In a first state, the rotary switch is in the open position, and in a second state, the rotary switch is in the locked position.

[0009] Beneficial effects: The rotary switch enables dual-state switching, offering a simple and intuitive operation. Users can easily lock and unlock the filter by rotating the switch, reducing the required force compared to push-button or snap-on structures and improving ease of use. The position of the rotary switch corresponds directly to the filter's status, allowing users to visually determine if the filter is locked, preventing malfunctions caused by an improperly secured filter and enhancing safety. The rotary switch's mechanical structure boasts high reliability and is less prone to aging and failure, reducing the failure rate and extending product lifespan compared to electronic switches.

[0010] In one alternative embodiment, a first driving ramp is provided on the bottom frame, and the rotary switch slides up and down above the first driving ramp while rotating between the open and locked positions.

[0011] Beneficial effects: By utilizing the guiding effect of the first driving inclined plane, the circumferential rotation of the rotary switch is converted into axial lifting motion, eliminating the need for additional lifting drive components, simplifying the structure of the lifting module, and reducing production and assembly costs. The inclined plane 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 and prevents uneven filter clamping caused by tray tilting. The inclined plane structure has a self-locking characteristic; after the rotary switch is switched to the locked position, it maintains a stable height under the support of the inclined plane, preventing the filter from loosening due to vibration or external forces, and improving the stability of the filter's working state.

[0012] In one alternative embodiment, a first protrusion is formed on the bottom frame, and a first driving ramp is formed on the first protrusion in the circumferential direction. A first groove is formed on the lower surface of the rotary switch. In a first state, the first protrusion is accommodated in the first groove.

[0013] Beneficial effects: The cooperation between the first protrusion and the first groove enables precise positioning of the rotary switch in the open position, preventing switch displacement caused by non-human operation and ensuring that the filter body can be freely placed and removed in the first state. The circumferentially inclined first drive ramp 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 switch, further improving the smoothness of the lifting action. The embedded cooperation between the protrusion and the groove has a compact structure, occupies little space, and at the same time enhances the connection strength between the rotary switch and the bottom frame, improving the overall rigidity of the lifting module.

[0014] In one alternative implementation, the lifting module includes: A slider structure is vertically movable between the tray and the rotary switch. The upper surface of the rotary switch is provided with a second driving slope. While the rotary switch rotates between the open position and the locked position, the slider structure slides up and down above the second driving slope.

[0015] Beneficial Effects: Utilizing the guiding effect of the second driving inclined plane, the circumferential rotation of the rotary switch is converted into the axial lifting motion of the slider structure. This eliminates the need for additional lifting drive components, simplifying the lifting module's structure and reducing production and assembly costs. The inclined plane drive 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 and preventing uneven filter clamping due to tray tilting. The inclined plane structure has a self-locking characteristic; after the rotary switch is switched to the locked position, the slider structure maintains a stable height under the support of the inclined plane, preventing filter loosening due to vibration or external forces and improving the stability of the filter's working state. The slider structure receives the driving force of the rotary switch and transmits it to the tray, making the tray's force more even. The lifting component, through the slider structure with no circumferential degrees of freedom, cooperates with the tray, preventing the tray from driving the lifting component to rotate and ensuring structural stability. Furthermore, the slider structure increases the contact area between the lifting module and the tray, preventing tray deformation due to single-point force and ensuring the filter body is horizontally clamped, improving rotational stability.

[0016] In one alternative embodiment, a second protrusion is formed on the rotary switch, and a second driving slope inclined in the circumferential direction is formed on the second protrusion. A second groove is formed on the lower surface of the slider structure. In the first state, the second protrusion is accommodated in the second groove.

[0017] Beneficial effects: The cooperation between the second protrusion and the second groove enables precise positioning of the slider structure in the first state, ensuring the tray is at the preset low height and providing ample space for the horizontal movement of the filter body. The circumferentially inclined second drive ramp fits tightly against the side wall of the second groove. When the rotary switch rotates, the driving force is evenly transmitted to the slider structure through the ramp, preventing the slider structure from jamming or shifting, and improving the synchronization of the lifting action. The cooperation structure between the protrusion and the groove has a limiting function, preventing the slider structure from disengaging from the rotary switch, improving the structural reliability of the lifting module and extending its service life. The embedded cooperation structure of the protrusion and the groove is compact, occupies little space, and at the same time enhances the connection strength between the rotary switch and the bottom frame, improving the overall rigidity of the lifting module.

[0018] In one alternative embodiment, a first protrusion is formed on the bottom frame, and a first driving slope inclined in the circumferential direction is formed on the first protrusion. The inner wall of the second protrusion is empty, and a first groove is formed on the lower surface of the rotary switch. In a first state, the first protrusion is accommodated in the first groove.

[0019] Beneficial Effects: The addition of a first driving ramp, forming a two-stage ramp drive, further expands the lifting stroke of the rotary switch during rotation without increasing its thickness, adapting to filter bodies of different thicknesses and improving product compatibility. The two-stage ramp drive design reduces the operating resistance of the rotary switch, making it easier for users to rotate. The empty inner wall at the corresponding position of the second protrusion provides space for the first protrusion, allowing for a nested layout of the upper and lower ramp drive ends. This significantly reduces the axial dimension of the lifting module, achieving an ultra-compact design and facilitating optimized configuration of the purifier's internal space. The driving directions of the first and second driving ramps are consistent. When the rotary switch rotates, the two ramp drives apply force synchronously or separately, improving lifting efficiency while ensuring the stability and coaxiality of the tray lifting. The empty inner wall design reduces the material usage of the rotary switch, achieving lightweighting while maintaining structural strength, thus reducing the overall weight and production costs.

[0020] In one alternative embodiment, a second mounting part is provided around the lower purification outlet of the bottom frame, and a lifting module is sleeved on the outside of the second mounting part. A guide rail structure extending vertically is formed on the second mounting part, and a slider structure cooperates with the guide rail and moves along the extension direction of the guide rail.

[0021] Beneficial effects: The cylindrical second mounting section provides a central positioning reference for the lifting module, ensuring that the lifting module is coaxially arranged around the lower purification outlet, avoiding radial offset during lifting, and improving the clamping accuracy of the filter body. The vertical guide rail structure guides the lifting movement of the slider structure, restricting the circumferential rotation of the slider structure and ensuring that the slider structure moves only along the axial direction, further improving the stability and levelness of the tray lifting. It also ensures that during the rotation of the rotary switch, the slider structure moves vertically under the drive of the second driving inclined plane.

[0022] The cooperation between the guide rail and the slider reduces frictional resistance during the lifting process, making the operation of the rotary switch easier, while also reducing component wear and extending the service life of the lifting module.

[0023] In one optional embodiment, the lifting module further includes: a lever, which slides between an unlocked position and a locked position along a first horizontal direction; a rotary switch has a long sliding hole; the lever has a pin extending vertically; and the pin is inserted into the long sliding hole and slides in cooperation with the long sliding hole.

[0024] Beneficial effects: The cooperation between the lever and the pin transforms the user's horizontal sliding operation of the lever into a circumferential rotational movement of the switch, making the operation more ergonomic. Users can easily lock and unlock the filter by pushing and pulling the lever, improving ease of use. The sliding engagement of the long sliding hole and the pin accommodates both the rotational and axial lifting movements of the switch, ensuring that the lever operation and lifting actions do not interfere with each other, improving the structural motion coordination. The lever design allows for flexible arrangement of the switch operation position, facilitating the extension of the operating end to the outside of the purifier casing for convenient user operation.

[0025] In one alternative implementation, the elongated slide hole extends radially along the rotary switch.

[0026] Beneficial effects: The elongated sliding hole extends radially along the rotary switch, aligning the sliding direction of the pin within the hole with the rotational tangent of the rotary switch. This results in higher force transmission efficiency, requiring less effort from the user when pushing the lever and reducing operational resistance. The radially elongated sliding hole design adapts to variations in the rotary switch's rotation radius, ensuring the pin always slides within the hole, preventing jamming and improving structural reliability. The radial layout allows for precise matching of the lever's sliding stroke with the rotary switch's rotation angle, enabling users to visually determine the filter's locking status by observing the lever's sliding distance.

[0027] In one alternative implementation, the pin is vertically movably slidably engaged with an elongated sliding hole.

[0028] Beneficial effects: The bidirectional sliding fit between the pin and the long sliding hole accommodates both the circumferential rotation and axial lifting motion of the rotary switch, ensuring that the lever operation is not interfered with by the raising and lowering of the rotary switch, thus improving structural compatibility and smoothness of movement. The vertical sliding design compensates for displacement changes during the raising and lowering of the rotary switch, avoiding lateral forces between the pin and the long sliding hole, reducing component wear, and extending service life. The bidirectional sliding fit makes the structural design more flexible, eliminating the need for additional compensation components and simplifying the overall structure of the lifting module.

[0029] In one alternative embodiment, the bottom support assembly has a guide hole extending in a first direction, the lever is slidably engaged with the guide hole, and the lever has a limiting groove that engages with the edge of the guide hole.

[0030] Beneficial effects: The lever extends to the outside of the outer casing, allowing users to lock and unlock the filter without opening the purifier's outer shell, significantly improving ease of use. The guide hole guides the sliding direction of the lever, ensuring precise operation. The engagement of the limiting groove and the guide hole edge guides the sliding process of the lever, preventing structural damage during sliding and avoiding the lever detaching from the guide hole and falling into the inside or outside of the casing, which could cause the lifting module to malfunction. The external operation design prevents users from contacting the internal components of the purifier, improving safety and preventing dust contamination of internal components.

[0031] In one alternative embodiment, a second mounting part is provided around the lower purification outlet by the bottom frame, a lifting module is sleeved on the outside of the second mounting part, and a tray is provided above the second mounting part.

[0032] Beneficial effects: The cylindrical second mounting section provides a coaxial mounting reference for the lifting module and the tray, ensuring that the tray is horizontally arranged around the lower purification outlet, avoiding uneven clamping of the filter body due to tray tilting, and improving the smoothness of filter rotation. The lifting module is sleeved on the outside of the second mounting section, and the tray is located above the second mounting section, forming a layered nested layout with a compact structure. It makes full use of the space above the bottom frame, avoids obstructing the lower purification outlet, and ensures ventilation efficiency. The cylindrical structure of the second mounting section enhances the rigidity of the bottom frame, improves the support capacity for the lifting module and the tray, and extends the service life of the bottom support components.

[0033] In one alternative embodiment, a first flange extending downward is provided at the outer edge of the tray, and a first receiving space for accommodating the lifting module is defined between the first flange and the second mounting portion.

[0034] Beneficial effects: The first flange and the second mounting section enclose the first accommodating space, completely concealing the lifting module beneath the tray. This provides enclosed protection for the lifting module, preventing dust, hair, and other foreign objects from entering and causing blockages, 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 enhances the tray's structural rigidity, improving its support for the filter body and preventing deformation due to excessive force.

[0035] In one alternative embodiment, a ball bearing assembly is provided between the tray and the lifting module. The ball bearing assembly includes a plurality of balls, at least a portion of which are located at the angle between the first flange and the tray.

[0036] Beneficial effects: The ball bearing assembly transforms the sliding friction between the tray and the lifting module into rolling friction, significantly reducing frictional resistance during filter rotation, resulting in smoother filter body rotation and reduced load and power consumption of the drive motor. The balls are positioned at the angle between the first flange and the tray, using the flange for limiting and preventing ball bearing detachment, thus improving the structural stability of the ball bearing assembly. Simultaneously, the even distribution of multiple balls ensures more uniform force distribution on the tray, eliminating jamming during rotation. Rolling friction reduces component wear, extending the service life of the tray and lifting module, and reducing maintenance frequency. Laterally positioned balls solve the problem of decreased accuracy caused by deviations resulting from relying on a single ball bearing or spring connection to limit the tray in traditional structures, providing better support and limiting effect, ensuring smooth and vibration-free rotation.

[0037] In one alternative embodiment, a second flange extending downward is provided at the inner edge of the tray, and a second receiving space for accommodating the sealing structure is defined between the second flange and the second mounting portion.

[0038] Beneficial effects: The second flange and the second mounting part form a second accommodating space, providing a stable installation position for the sealing structure and ensuring a tight fit between the sealing structure and the tray and the second mounting part, thus improving the sealing performance of the lower purification outlet. The sealing structure prevents unfiltered airflow from entering the lower air outlet through the gap between the tray and the second mounting part, avoiding airflow short-circuiting and ensuring that all airflow passes through the filter body, improving purification efficiency. The second flange enhances the structural rigidity of the inner ring of the tray, preventing deformation of the inner ring under stress, and also protects the sealing structure from being damaged by compression.

[0039] In one alternative embodiment, the filter device further includes a top cover disposed above the bottom frame, the top cover having a second opening through which a tray passes to engage with the filter body; In the first state, the tray is at the same height as the top cover.

[0040] Beneficial effects: The top cover provides protection above the bottom frame while ensuring a smooth surface on the air duct wall defined above it. The second opening provides clearance for the tray's lifting and lowering movement, ensuring uninterrupted cooperation between the tray and the filter body. In the first state, the tray and top cover are flush, creating a flat operating surface inside the purifier. The filter body can be smoothly slid in and out horizontally, avoiding jamming due to height differences and further improving the ease of replacement. The top cover also seals the upper part of the bottom frame, reducing the amount of foreign objects falling onto the complex bottom frame structure and improving the overall cleanliness of the unit during filter installation.

[0041] Secondly, the present invention provides an air purifier, including a housing and the aforementioned filter device. The housing is provided with an upper air outlet and a lower air outlet, and an air inlet is also provided on the peripheral wall. An upper purification outlet communicating with the upper air outlet is formed on the top support component of the filter device, and a lower purification outlet communicating with the lower air outlet is formed on the bottom support component. The filter body corresponds to the air inlet. Attached Figure Description

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the structure of a filtration device according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a filtering device according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of a filtering device according to an embodiment of the present invention; Figure 4 This is a partially enlarged schematic diagram of a filter body according to an embodiment of the present invention; Figure 5 This is a partial cross-sectional view of a filtering device according to an embodiment of the present invention; Figure 6 This is an exploded view of a top support component according to an embodiment of the present invention; Figure 7 This is a partial structural schematic diagram of a filter body according to an embodiment of the present invention; Figure 8 This is a schematic diagram of a first transmission structure according to an embodiment of the present invention; Figure 9 This is an exploded view of a bottom support component according to an embodiment of the present invention; Figure 10This is an exploded view of a bottom support component according to an embodiment of the present invention; Figure 11 This is a partial structural diagram of a bottom support component according to an embodiment of the present invention; Figure 12 for Figure 11 A magnified view of a portion of the image; Figure 13 This is a partial cross-sectional view of a bottom support component according to an embodiment of the present invention; Figure 14 for Figure 13 A magnified view of a portion of the image; Figure 15 This is a partial cross-sectional view of a bottom support component according to an embodiment of the present invention; Figure 16 for Figure 15 A magnified view of a portion of the image; Figure 17 This is a partial cross-sectional view of a bottom support component according to an embodiment of the present invention; Figure 18 This is a partial cross-sectional view of the bottom support component and the filter body in an embodiment of the present invention. Figure 19 for Figure 18 A magnified view of a portion of the image; Figure 20 This is a partial cross-sectional view of the bottom support component and the filter body in an embodiment of the present invention. Figure 21 for Figure 20 A magnified view of a portion of the image; Figure 22 This is a schematic diagram of the structure of a rotary switch according to an embodiment of the present invention; Figure 23 This is a schematic diagram of the structure of a lever according to an embodiment of the present invention; Figure 24 This is a schematic diagram of the structure of a lever according to an embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures: 104. Guide hole; 30. Filter device; 3401. Guide slope; 3402. Guide part; 3403. Guide mating part; 31. Filter screen body; 311. Filter cotton; 312. Top end cover; 3121. Insertion hole; 31211. First limiting rib; 3122. End cover body; 31221. Positioning ring; 3123. Reinforcing rib; 32. Top support assembly; 321. Top frame; 3211. First opening; 3212 322. Stepped surface; 322. Drive assembly; 3221. First transmission structure; 32211. First mounting part; 32212. Drive end structure / plug-in protrusion; 322121. Second limiting rib; 32213. Transmission body; 322131. First transmission gear; 32214. Connecting rib; 3222. Drive gear; 3223. Drive motor; 323. Cover; 3231. Rotating shaft; 3232. Extension rib; 3230. 3233 Upper purification outlet; 324 Clearance opening; 325 Mesh cover; 3201 Ball bearing structure; 3201 First installation space; 335 Bottom support assembly; 336 Bottom frame; 337 lower purification outlet; 338 second mounting section; 33921 ​​guide rail structure; 3303 first protrusion; 33131 first drive ramp; 3302 lifting module; 3313 rotary switch; 33212 second protrusion; 33212 1. Second driving inclined surface; 33213. Long sliding hole; 3322. Slider structure; 33221. Second groove; 3323. Toggle lever; 33231. Pin; 33232. Limiting groove; 333. Tray; 3331. First flange; 3332. Second flange; 334. Ball bearing; 32335. Sealing structure; 336. Top cover; 3361. Second opening; 3301. First receiving space; 3302. Second receiving space. Detailed Implementation

[0045] 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.

[0046] The following is combined with Figures 1 to 24 The following describes embodiments of the present invention.

[0047] According to an embodiment of the present invention, a filtration device 30 is provided, comprising: a top support assembly 32, which includes a rotatably configured upper mating structure; a bottom support assembly 33, which includes a lifting module 332 and a tray 333 disposed above the lifting module 332 and having relative movement with the lifting module 332; and a filter body 31 disposed between the tray 333 and the upper mating structure.

[0048] The filter device 30 includes a first state and a second state. In the first state, the tray 333 is located at a first height, and the filter body 31 is movably disposed between the upper mating structure and the tray 333 in the horizontal direction. In the second state, the tray 333 is raised to a second height under the drive of the lifting module 332, and the filter body 31 is sandwiched between the upper mating structure and the tray 333.

[0049] This application enables the filter device 30 to dynamically switch between a first state and a second state through the active deformation of the mechanical structure, thereby adapting to the installation and maintenance conditions and stable working conditions of the filter body 31 respectively.

[0050] The first state corresponds to the installation or maintenance state of the filter device 30, and the second state corresponds to the working and locked state of the filter device 30. This state division achieves structural decoupling: on the one hand, it meets the requirements for operating space during installation and maintenance, and on the other hand, it meets the requirements for rigid locking during operation.

[0051] In the first state, by controlling the tray 333 to be at a lower first height, a sufficient axial gap is created between the tray 333 and the upper mating structure above, so that the filter body 31 can move freely horizontally, thereby creating physical conditions for the unobstructed picking and placing of the filter body 31.

[0052] In the first state, the user's operation of changing the filter can be simplified to a simple "horizontal pick-up and drop", which improves the convenience of the filter body 31 and enhances the user experience.

[0053] The switching between states is driven by the lifting module 332. 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 body 31 to be synchronously limited by the upper mating structure and the lower tray 333, thus being clamped between the two.

[0054] In the second state, the filter body 31 is axially limited, which effectively prevents the filter body 31 from axial movement, radial eccentricity or circumferential slippage that may occur during high-speed rotation. This makes the filter body 31 rotate smoothly and at a uniform speed, significantly reducing operating noise and machine vibration caused by vibration and eccentricity. At the same time, this also ensures the uniformity of airflow when passing through the filter and improves the consistency of purification effect.

[0055] In summary, the filter device 30 employs a dual-state switching design, balancing the convenience of filter replacement with operational stability. In the first state, the tray 333 is in a low position, allowing the filter body 31 to move freely horizontally. This enables quick and easy placement and removal without disassembling other components, completely resolving the cumbersome process of traditional filter replacement. In the second state, the tray 333 rises, clamping the filter body 31 between the upper fitting structure and the tray 333, creating a stable clamping position. This prevents displacement and eccentricity during filter rotation, ensuring smooth operation. The clamped filter body 31 also provides more stable rotational drive force transmission, preventing power loss and noise caused by filter 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.

[0056] Since the filter body 31 can rise and cooperate with the upper fitting structure of the top support component 32, the drive component 322 can be set on the top support component 32 on the upper side of the filter device 30, thereby obtaining a better driving effect that is not affected by the gravity of the filter body 31. Of course, the drive component 322 can also be set on the bottom support component 33 on the lower side of the filter device 30.

[0057] In one embodiment, such as Figures 9-21 As shown, the bottom support assembly 33 includes a bottom frame 331, a tray 333, and a lifting module 332. The bottom frame 331 is fixedly installed and has a lower purification outlet 3311 formed on it. The tray 333 is arranged around the lower purification outlet 3311, and the lifting module 332 is arranged between the tray 333 and the bottom frame 331.

[0058] Thus, based on the bottom frame 331, a clear functional division is achieved inside the outer shell 10, and rigid support is provided for the lifting process.

[0059] The bottom frame 331 is fixed in place, and its primary function is to serve as the installation reference and load-bearing foundation for the entire bottom support assembly 33 and even the filter device 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 device 30.

[0060] The tray 333 is designed to surround the lower purification outlet 3311, with its inner ring area being empty and corresponding to the lower purification outlet 3311, allowing clean air flowing from inside the filter body 31 to be discharged directly through the lower purification outlet 3311 without obstruction. The tray 333 only provides annular support for the bottom of the filter in its outer ring area. This achieves physical separation of the "support surface" and the "airflow channel" in radial space, preventing them from interfering with each other.

[0061] The lifting module 332 is positioned between the tray 333 and the bottom frame 331, utilizing the interlayer area between them. By completely concealing and protecting the lifting module 332 under the tray 333, which serves as the support platform, it is isolated from the filter body 31, thereby ensuring the stability of the support effect.

[0062] 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 body 31. 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 103, and at the same time ensuring that the bottom of the filter body 31 is evenly stressed, preventing excessive local pressure from causing filter deformation. The lifting module 332 is hidden between the tray 333 and the bottom frame 331, optimizing the space layout, making the bottom support component 33 compact, reducing the space occupied inside the purifier, and facilitating the miniaturization design of the entire unit.

[0063] In other embodiments, the tray 333 may be directly integrated into the lifting module 332, which is not limited here.

[0064] In one embodiment, the lifting module 332 can drive the tray 333 to rise and fall. For example, the lifting module 332 may include a lifting assembly composed of an elastic element that provides an upward restoring force, or the tray 333 may be driven to rise and fall by other drive end structures 32212.

[0065] like Figures 9-22 As shown, the lifting module 332 includes a rotary switch 3321. The rotary switch 3321 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.

[0066] In other words, the lifting module 332 of this application is driven by a mechanical rotary switch 3321. Since the tray 333 is a ring structure surrounding the lower purification outlet 3311, the lifting module 332 is similar in shape and also has a ring-like structure. The rotation process of the rotary switch 3321 will not change the projection position and area of ​​the lifting module 332 on the horizontal plane. Therefore, it is more suitable to achieve lifting drive by rotating the rotary switch 3321.

[0067] 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 device 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 inaccurate positioning and limit failure caused by imprecise adjustment.

[0068] Through a specific structure, the circumferential rotation of the rotary switch 3321 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 of the tray 333 through a simple rotational action.

[0069] The dual-state switching is achieved using a rotary switch 3321, which is simple and intuitive to operate. Users can easily lock and unlock the filter by rotating the switch 3321. Compared to 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 device 30, allowing users to visually determine whether the filter is locked, avoiding operational malfunctions caused by the filter not being properly secured, and improving safety. The rotary switch 3321 has a highly reliable mechanical structure and is less prone to aging and failure, reducing the failure rate and extending the product's lifespan compared to electronic switches.

[0070] In other embodiments, the lifting module 332 may also use an electronic switch to achieve lifting switching, which is not limited here.

[0071] In one embodiment, such as Figure 9 and Figure 10 As 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.

[0072] The first driving inclined surface 33131 provided on the bottom frame 331 allows the rotary switch 3321 to slide up and down above the first driving inclined surface 33131 while rotating between the open and locked positions. This utilizes the inclined surface mechanism to directly and efficiently convert the rotational motion of the rotary switch 3321 into its own axial lifting motion.

[0073] According to the principles of inclined plane mechanics, the displacement of an object sliding along an inclined plane can be decomposed into vertical and horizontal components. The first driving inclined plane 33131, fixed to the bottom frame 331, has an inclination direction along the circumferential direction, creating a height change along the rotation path of the rotary switch 3321. When the rotary switch 3321 rotates relative to the bottom frame 331, the portion in contact with the inclined plane is forced to move along the contour of the inclined plane. Due to the radial and circumferential constraints of the inclined plane, this relative circumferential sliding inevitably forces the rotary switch 3321 to generate a forced displacement in the vertical direction, thereby achieving the linkage between rotation and lifting.

[0074] 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 fewer parts and easy assembly. The inclined plane transmission itself has the characteristics of smooth movement and low impact, making the process of the rotary switch 3321 sliding up and down along the inclined plane stable and controllable.

[0075] 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.

[0076] 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.

[0077] In one embodiment, such as Figure 9 and Figure 10 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 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.

[0078] 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.

[0079] When the filter device 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.

[0080] 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 also be provided on the top of the protrusion or the bottom of the groove.

[0081] In one embodiment, such as Figures 9-21 As shown, the lifting module 332 includes a slider structure 3322. This slider structure 3322 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. When 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.

[0082] The lifting module 332 is provided with a slider structure 3322 between the tray 333 and the rotary switch 3321. This slider structure 3322 can only move vertically up and down, which makes the rotation of the rotary switch 3321 and the tray 333 independent of each other, avoiding unnecessary synchronous rotation between the two.

[0083] The slider structure 3322, acting as an independent intermediate component, indirectly transmits the driving force of the rotary switch 3321 to the tray 333, achieving functional decoupling. Specifically, the rotary switch 3321 is responsible for driving, while the slider structure 3322 is responsible for transmitting the driving force and guiding it vertically. This avoids direct and complex coupling between the rotary switch 3321 and the tray 333, allowing each part to be optimized independently. Simultaneously, the slider structure 3322 and the tray 333 have a sufficiently large contact surface, enabling more even and stable transmission of the driving force and preventing tilting caused by excessive force at a single point or uneven force on the tray 333.

[0084] The slider structure 3322 can be a complete ring or multiple independent sliders distributed circumferentially.

[0085] The second driving inclined surface 332121 provided on the rotary switch 3321 allows the slider structure 3322 to slide up and down above the inclined surface when the rotary switch 3321 rotates between the open and locked positions. This utilizes the inclined surface mechanism to directly and efficiently convert the rotational motion of the rotary switch 3321 into the axial lifting motion of the slider structure 3322.

[0086] 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 vertical degree of freedom, and 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".

[0087] 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.

[0088] The inclined plane transmission itself has the characteristics of smooth motion and low impact, which makes the process of the slider structure 3322 sliding up or down along the inclined plane stable and controllable.

[0089] 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.

[0090] 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, achieving a reverse mating relationship. The introduction of the slider structure 3322 makes the driving force transmission more uniform, avoids the tray 333 from tilting or deforming due to single-point force, and ensures that the filter screen is horizontally clamped and has rotational stability. At the same time, the slider structure 3322 restricts circumferential rotation, ensuring structural stability.

[0091] In one embodiment, such as Figure 10 and Figure 22 As shown, a second protrusion 33212 is formed on the rotary switch 3321, and a second driving inclined surface 332121 inclined in the circumferential direction is formed on the second protrusion 33212. A second groove 33221 is formed on the lower surface of the slider structure 3322. In the first state, the second protrusion 33212 is received in the second groove 33221.

[0092] A second protrusion 33212 is formed on the rotary switch 3321, and a second driving inclined surface 332121 with a height variation along the circumference is provided on the protrusion. Correspondingly, a second groove 33221 is formed on the lower surface of the slider structure 3322. The two constitute an embedded convex-concave mating mechanism that integrates precise positioning, motion guidance and stroke limitation.

[0093] When the filter device 30 is in the first state, i.e., when 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.

[0094] The number of second protrusions 33212 and second grooves 33221 can be multiple, evenly distributed along the circumference 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 also be provided on the top of the protrusion or the bottom of the groove.

[0095] In one embodiment, such as Figure 9 , Figure 10 and Figure 22 As shown, a first protrusion 3313 is formed on the bottom frame 331, and a first driving inclined surface 33131 inclined in the circumferential direction is formed on the first protrusion 33133. A first groove is formed on the lower surface of the rotary switch 3321. At the same time, the inner wall of the second protrusion 33212 is empty, providing a receiving space for the first protrusion 3313. In the first state, the first protrusion 3313 is received in the first groove. Thus, within a limited thickness space, both the first-level driving interface connecting the rotary switch 3321 and the bottom frame 331, and the second-level driving interface connecting the rotary switch 3321 and the slider structure 3322 are integrated. The axial overlap and spatial reuse of the dual-level driving interfaces realize the ultra-thin design of the lifting module 332.

[0096] The rotary switch 3321 serves as an intermediate transmission component. Its lower surface has a first groove that mates with the first protrusion 3313 of the bottom frame 331, and its upper surface has a second protrusion 33212 for driving the slider structure 3322. To minimize axial thickness, the internal area of ​​the rotary switch 3321 corresponding to the second protrusion 33212 is designed as 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 to "pass through" the rotary switch 3321, 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.

[0097] 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.

[0098] In the second-stage conversion phase, the second driving ramp 332121 of the second protrusion 33212 on the upper surface of the rotary switch 3321 slides within the second groove 33221 of the slider structure 3322. This ramp forces the slider structure 3322 to produce an axial displacement relative to the rotary switch 3321.

[0099] Ultimately, in the second state, the total lifting stroke of the slider, tray 333, and filter body 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.

[0100] 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 filter bodies 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.

[0101] The inner wall of the second protrusion 33212 is left empty, providing space for the first protrusion 3313. This allows for a nested layout of the upper and lower drive structures, significantly reducing the axial dimension of the lifting module 332 and achieving an ultra-compact design that facilitates optimized configuration of the purifier's internal space. The first and second drive ramps 332121 drive in the same direction. When the rotary switch 3321 rotates, the two ramps act synchronously or sequentially, 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 costs.

[0102] In one embodiment, such as Figures 9-21 As shown, the bottom frame 331 surrounds the lower purification outlet 3311 and has a second mounting part 3312. The lifting module 332 is sleeved on the outside of the second mounting part 3312. A guide rail structure 33121 extending vertically is formed on the second mounting part 3312. The slider structure 3322 cooperates with the guide rail and moves along the extension direction of the guide rail.

[0103] The bottom frame 331 surrounds the lower purification outlet 3311 and has a second mounting part 3312, meaning that the second mounting part 3312 is primarily a physical extension and component of the lower purification duct. It is designed and reinforced as a "central cylinder" with sufficient structural rigidity. This cylinder serves multiple roles: it is the channel for the exhaust of clean airflow and the central positioning reference for the entire lifting module 332; it is the mounting foundation and load-bearing core for the lifting module 332 and the tray 333, while also providing guidance for their movement.

[0104] The central cylinder provides a natural, immovable center for the lifting module 332 that is fitted on the outside, ensuring that all movements of the entire lifting module 332 revolve around this central axis, fundamentally guaranteeing that the lifting of the tray 333 has a higher degree of coaxiality.

[0105] 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 structure 3322, enabling it to drive the tray 333 to complete a purely vertical lifting and lowering motion, avoiding any tilting or twisting.

[0106] In one embodiment, such as Figures 10-12 As shown, the lifting module 332 also includes a lever 3323. The lever 3323 can slide between the unlocked and locked positions along a horizontal first direction. The rotary switch 3321 is provided with a pin 33231 extending vertically, and the lever 3323 is provided with a long sliding hole 33213, into which the pin 33231 is inserted and slidably engaged.

[0107] Therefore, the power input point of the lifting module 332 is transferred from the rotary switch 3321 itself to the independent lever 3323. The horizontal linear sliding operation applied by the user to the lever 3323 is more intuitive for side operation of the equipment and easier to apply force. When the lever 3323 is moved horizontally, the pin 33231 will push or pull 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 to drive the rotary switch 3321 to rotate around its axis.

[0108] In one embodiment, such as Figures 10-12 As shown, the elongated sliding hole 33213 extends radially along the rotary switch 3321. This radial extension design 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 changes 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. Furthermore, 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 filter's locking status through the sliding distance of the lever 3323.

[0109] 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.

[0110] In one embodiment, such as Figure 23 and Figure 24 As shown, the pin 33231 is movably slidably engaged with the elongated sliding hole 33213 in a vertical manner.

[0111] This bidirectional sliding fit allows the pin 33231 to simultaneously accommodate 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 long sliding hole 33213, helping to reduce component wear and extend service life. The bidirectional sliding fit also 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.

[0112] In one embodiment, such as Figures 10-12 , Figure 23 and Figure 24 As shown, the bottom support assembly 33 is provided with a guide hole 104 extending in the first direction, the lever 3323 slides with the guide hole 104, and the lever 3323 is provided with a limiting groove 33232 that mates with the edge of the guide hole 104.

[0113] The lever 3323 extends to the outside of the outer casing 10, allowing users to lock and unlock the filter without opening the purifier casing 10, significantly improving ease of use. 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 sliding and avoiding the lever 3323 from detaching from the guide hole 104 and falling into or outside the outer casing 10, which could cause the lifting module 332 to malfunction. Furthermore, the external operation design prevents users from contacting internal components of the purifier, improving safety and preventing dust contamination of internal components.

[0114] In one embodiment, such as Figures 9-21 As shown, the bottom frame 331 surrounds the lower purification outlet 3311 and has a second mounting part 3312. 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.

[0115] The second mounting part 3312 can be integrally formed with the bottom frame 331 or assembled as a separate 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 body 31 due to the tilt of the tray 333, and improving the smoothness of the filter rotation. 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 bottom support assembly 33.

[0116] In one embodiment, such as Figures 13-21 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.

[0117] By providing a downwardly extending first flange 3331 along the outer edge of the tray 333, it together with the central cylindrical second mounting portion 3312 defines a first receiving space 3301 for accommodating the lifting module 332. This achieves functional partitioning, concealment of the lifting module, and reinforcement of the tray structure.

[0118] 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 second mounting portion 3312 of the cylinder. The lifting module 332 is "stored" and "hidden" under the tray 333, physically isolating it from the filter body 31 above.

[0119] The first flange 3331 integrates the bearing surface of the tray 333 with the lateral enclosure structure, significantly enhancing the rigidity of the tray 333's edge and preventing the tray 333 from curling or deforming when subjected to off-center loads or rotational inertia forces from the filter body 31. The gap between the flange and the second mounting part 3312 is precisely calculated to accommodate the lifting module 332 and also provide a certain degree of radial guidance or limiting, improving the overall stability of the tray 333's movement.

[0120] 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.

[0121] In one embodiment, such as Figures 9-14 , Figures 17-21 As shown, a ball bearing 334 assembly is provided between the tray 333 and the lifting module 332, including multiple balls 334. At least a portion of the multiple balls 334 are located at the angle between the first flange 3331 and the tray 333, and rolling friction can be used instead of sliding friction.

[0122] 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.

[0123] 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 333 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.

[0124] A retainer or segmented ball nests 334 can be designed at the corners to precisely fix the position of each ball 334 and prevent them from colliding with each other.

[0125] In one embodiment, such as Figures 9-21 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.

[0126] 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.

[0127] In one embodiment, such as Figure 9 , Figure 10 and Figures 18-21 As shown, the filter device 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 body 31. In the first state, the tray 333 is at the same height as the upper cover 336.

[0128] 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 body 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 body 31 can be smoothly slid in the horizontal direction for placement and removal, 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 body installation.

[0129] The following describes the complete operating steps for replacing the filter body 31 of the filter device 30, based on the accompanying drawings.

[0130] First, ensure the air purifier is powered off. Specifically, 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 body 31, confirming it is the compatible model. Check that the cylindrical structure of the filter body 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 device 30 is in the second state.

[0131] Then perform the unlocking operation, move the lever 3323 to the unlock position, and push the lever 3323 along the horizontal extension direction of the guide hole 104, i.e., the first direction, until the lever 3323 engages with the end hole on the other side of the guide hole 104. At this time, the lever 3323 is in the "unlock position".

[0132] 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 around the second mounting part 3312 of the bottom frame 331 to the "open position". 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. 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, level with the height of the upper cover 336. The filter device 30 enters the first state, at which time the filter body 31 can move freely in the horizontal direction for replacement. Next, replace the filter. Remove the old filter horizontally. The filter body 31 is sandwiched between the upper mating structure and the tray 333. Pull the filter body 31 outwards 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. Push it horizontally between the upper mating structure and the tray 333. The lower end face of the filter body 31 should align with the support surface of the tray 333. At this point, the filter is in the "pre-installation position," with its central axis coinciding as much as possible with the central axes of the upper mating structure and the tray 333.

[0133] During the insertion process, the drive end structure 32212 of the top support component 32 may be located on the horizontal movement path of the filter body 31. However, since the first transmission structure 3221, which forms an upper mating structure, can move up and down a certain distance, the drive end structure 32212 may move upward under the drive of the filter body 31 to avoid the filter body 31. After moving to the pre-installation position, the drive end structure 32212 loses the constraint of the filter body 31, moves downward, and engages with the filter body 31. The user can determine whether the filter body 31 is installed in the pre-installation position based on whether the drive end structure 32212 falls.

[0134] Then, perform the locking operation by reversing the lever 3323 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 opposite 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 body 31 is clamped between the tray 333 and the upper mating structure to achieve circumferential limiting and axial fixing.

[0135] At this time, the ball bearing structure 325 contacts and engages with the lower surface of the cover 323, and the filter device 30 enters the second state, and the filter screen body 31 can rotate synchronously with the upper engaging structure. Finally, restore power to the device: plug the power cord into the socket, turn on the device power switch, and the device will enter standby mode.

[0136] This application decouples the self-weight bearing and rotation drive tasks of the filter body 31 into two independent functional components. The tray 333 of the bottom support component 33 serves as a dedicated gravity bearing structure, directly bearing the entire weight load of the filter body 31. The self-weight of the filter body 31 is transferred to the bottom frame 331 through the tray 333, and finally, the outer shell achieves stable bearing. The drive component 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. Structurally, the connection between the self-weight of the filter and the drive torque is severed, completely avoiding the structural contradiction of "drive component 322 both bearing weight and transmitting force" in the traditional bottom drive mode, and creating a low-load working environment for drive component 322.

[0137] Therefore, the drive assembly 322 does not need to counteract the filter's own weight; it only needs to output rotational torque to drive the filter body 31 to rotate. This avoids technical malfunctions such as jamming, uneven speed, and inability to rotate caused by the weight of the filter itself, which are common in traditional bottom-drive modes. It can be applied to driving large-diameter, high-density high-efficiency filters, solving the problem of insufficient motor torque and improving operational smoothness. It also extends the lifespan of the drive assembly 322 and reduces energy consumption.

[0138] Meanwhile, the tray 333 is rotatable and is engaged with the bottom frame 331 through ball bearings 334 or sliding bearings, so that the tray 333 can rotate synchronously with the filter body 31, which can realize the function of bearing its own weight without hindering the rotation of the filter, and at the same time, it does not generate rotational resistance, thus realizing the coordinated work of the tray 333 in bearing and following.

[0139] The filtration device 30 adopts a modular design consisting of a top support assembly 32, a bottom support assembly 33, and a filter body 31. The top support assembly 32 integrates the driving function and the function of defining the upper airflow duct 212, while the bottom support assembly 33 integrates the load-bearing function and the function of defining the lower airflow duct. The filter body 31 is positioned between the two. This structure clearly defines the functional boundaries of each component. During assembly, the top support assembly 32 and the bottom support assembly 33 can be fixed first, and then the filter body 31 can be installed, simplifying the assembly process. During maintenance, any module can be disassembled and installed individually, effectively simplifying the assembly process and significantly reducing maintenance difficulty. Furthermore, the top-driven layout leaves more space below the bottom frame 331 inside the outer casing for arranging other internal structures of the purifier.

[0140] In summary, this application overturns the traditional layout where the filter body 31 is driven by the lower tray 333. Instead, it integrates the drive component 322 into the top frame 321, and the weight of the filter body 31 is supported by the lower tray 333. The drive component 322 does not need to work against the weight of the filter itself, thus completely solving the problem of insufficient motor torque caused by the weight of the lower drive. The smoothness of the filter rotation is significantly improved, avoiding malfunctions such as jamming or even failure to rotate.

[0141] In one embodiment, such as Figures 2-3 and Figures 5-6 As shown, the drive assembly 322 includes a drive motor 3223 and a first transmission structure 3221 rotatably disposed above the top frame 321. The drive motor 3223 is used to drive the first transmission structure 3221 to rotate around the rotating shaft 3231. The filter body 31 is disposed between the first transmission structure 3221 and the tray 333 and rotates synchronously with the first transmission structure 3221.

[0142] The first transmission structure 3221 serves as a dedicated power intermediary between the drive motor 3223 and the filter body 31. Its core function is to achieve a smooth transition and direction change of torque. The rotational power output by the drive motor 3223 first acts directly or indirectly on the first transmission structure 3221. Through the transmission cooperation between the first transmission structure 3221 and the filter body 31, the power is transmitted to the filter body 31. Thus, the rigidity of the first transmission structure 3221 can be used to attenuate the torque fluctuation of the drive motor 3223, avoiding instantaneous impact loads from directly acting on the filter body 31.

[0143] Meanwhile, the first transmission structure 3221 rotates around the shaft 3231 of the top frame 321, and the shaft 3231 provides a fixed center of rotation for it, ensuring that the axis of the first transmission structure 3221 and the axis of the filter body 31 always coincide during the power transmission process, forming a "coaxial transmission" system and eliminating the influence of radial force on power transmission efficiency.

[0144] In some embodiments, the first transmission structure 3221 and the filter body 31 can cooperate by means of insertion, snap-fit ​​or contact friction to transmit torque.

[0145] The filter body 31 is clamped between the first transmission structure 3221 and the tray 333, forming a bidirectional 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 body 31 on both sides of the axial direction, ensuring that the filter body 31 has no axial movement and can achieve synchronous rotation.

[0146] The first transmission structure 3221 serves as the power transmission intermediary between the drive motor 3223 and the filter body 31, achieving a smooth power transition and avoiding torque fluctuations caused by the direct connection between the drive motor 3223 and the filter body 31. This further improves the smoothness of the filter rotation. The filter body 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 body 31 always rotates around the preset axis, avoiding the problem of eccentric vibration.

[0147] In some other embodiments, the first transmission structure 3221 may also be formed directly from the drive shaft of the drive motor 3223, which is not limited here.

[0148] In one embodiment, such as Figure 2 , Figure 3 and Figures 5-6 As shown, a first opening 3211 is provided on the top frame 321, and 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. The drive motor 3223 drives the first transmission structure 3221 to rotate by transmission cooperation with the transmission part.

[0149] 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 of the first opening 3211 by the first transmission structure 3221. This arrangement ensures that the air purified by the filter body 31 can pass directly through the first opening 3211 and flow unobstructed to the upper purification outlet 3230 connected to the upper air outlet, thereby minimizing airflow resistance and wind loss.

[0150] In other words, the first transmission structure 3221 is arranged around the first opening 3211, which provides a passage for the filtered clean air. The air can smoothly enter the upper purification outlet 3230 through the first opening 3211, avoiding the transmission structure from blocking the air duct and causing an increase in airflow resistance, thus ensuring the air outlet efficiency.

[0151] The transmission unit is directly formed on the outer peripheral surface of the first transmission structure 3221. The drive motor 3223 drives the first transmission structure 3221 to rotate through gear meshing or belt friction transmission with the transmission unit formed on the outer peripheral surface. This peripheral drive design substantially increases the lever arm of the driving force, which reduces the instantaneous force required by the drive motor 3223 to output the same torque, thereby reducing the peak torque requirement of the motor and improving the mechanical efficiency and stability of the transmission system.

[0152] The transmission unit is located on the outer peripheral surface of the transmission body 32213. The drive motor 3223 cooperates with the transmission unit on the outer peripheral surface, which does not require occupying the space of the central air duct, thus optimizing the spatial layout of the top frame 321 and making the structure more compact.

[0153] In other embodiments, the transmission part may also be formed on other locations such as the inner circumferential surface of the transmission body 32213, which is not limited here.

[0154] In one embodiment, such as Figure 6 As shown, the drive motor 3223 and the transmission assembly connecting the drive motor 3223 and the transmission part are located above the top frame 321 and are positioned to avoid the first opening 3211.

[0155] The drive motor 3223 and its transmission assembly with the transmission unit are positioned above the top frame 321, and are designed to actively avoid the central area where the first opening 3211 is located. This allows for vertical spatial layering of the functional modules. The drive motor 3223, which generates power, and the transmission assembly, which converts torque, are physically isolated vertically from the space below the top frame 321, and horizontally separated from the first opening 3211, which serves as an airflow channel.

[0156] The transmission component can be a reduction gear set, a drive shaft, a pulley, or other structures, and is not limited thereto.

[0157] The drive 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 ensuring that the drive assembly 322 is not placed in the airflow path. This maximizes the ventilation volume of the upper purification outlet 3230 and optimizes the overall purification efficiency. The drive motor 3223 and transmission assembly are integrated above the top frame 321, separated from the lower filter body 31, preventing dust accumulation on the filter from contaminating the drive components and extending the service life of the drive assembly 322. The independent modular layout facilitates the individual disassembly and maintenance of the drive assembly 322 without disassembling the filter body 31 or other components, reducing maintenance difficulty.

[0158] In one embodiment, such as Figure 5 , Figure 6 and Figure 8 As shown, the transmission part forms a first transmission gear 322131, and the drive assembly 322 also includes a second transmission structure, which is formed as a drive gear 3222 that meshes with the first transmission gear 322131.

[0159] The transmission unit is designed as the first transmission gear 322131, and a second transmission structure, namely the drive gear 3222, is added to the drive assembly 322 to mesh with it, thus forming a compact gear meshing transmission system.

[0160] 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 drive motor 3223 into the rotational motion of the first transmission gear 322131 and the filter body 31 connected thereto.

[0161] The torque output by the drive 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 to rotate. The power transmission path is short, the intermediate loss is extremely low, and the transmission efficiency is high.

[0162] 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 drive motor 3223 is effectively applied to the filter body 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 body 31 and guaranteeing consistent filtration performance, thus preventing incomplete filtration in certain areas due to speed fluctuations. The gear transmission also boasts strong load-bearing capacity, making it suitable for large-diameter, high-density filter bodies 31. Even if dust accumulation on the filter increases rotational resistance, stable rotation is maintained, preventing motor overload damage.

[0163] In one embodiment, such as Figure 6 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.

[0164] Specifically, 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 times. The torque output by the drive 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.

[0165] 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 drive motor 3223, reducing intermediate links.

[0166] 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 body 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 drive motor 3223 is converted into low-speed, high-torque power after gear meshing and transmitted to the filter body 31, effectively improving torque output capability and completely solving the problem of uneven rotation or inability to rotate caused by filter load. The reduction transmission can reduce the rotational speed of the filter body 31, avoiding filter deformation caused by centrifugal force generated by high-speed rotation, while also reducing rotational noise and improving the user experience. A reasonable gear ratio matching allows the drive 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, the size of the drive gear 3222 is reduced to avoid it occupying too much space and affecting the internal structural layout of the air purifier.

[0167] In one embodiment, such as Figure 6 As shown, the drive shaft of the drive motor 3223 is coaxially and fixedly connected to the drive gear 3222. This achieves extreme simplification and minimization of the power transmission path.

[0168] The output shaft of the drive motor 3223 directly serves as the rotation shaft 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 number of connection points that may cause torsional elastic deformation, backlash, or energy loss.

[0169] 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, avoiding tooth surface wear caused by lateral forces during gear meshing, and extending the service life of the gears. The drive motor 3223 and the first transmission gear 322131 are only connected through the drive gear 3222, which simplifies the structure of the drive assembly 322, reduces production and design costs, and reduces the space cost of arranging the drive assembly 322.

[0170] In some embodiments, the output shaft end of the drive motor 3223 is directly machined with gear teeth, achieving true motor-gear integration. In other embodiments, the drive shaft of the drive motor 3223 and the drive gear 3222 are splined to transmit greater torque and ensure circumferential positioning between them.

[0171] In one embodiment, such as Figure 5 , Figure 6 and Figure 8 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 is formed on at least a part of the outer peripheral surface.

[0172] 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.

[0173] 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.

[0174] By shaping a portion of the first transmission structure 3221, typically the part protruding above the upper surface of the top frame 321, into a transmission section on the outer periphery of that portion, the key functional area for transmission is essentially elevated 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 concealed location hidden beneath it.

[0175] The first transmission structure 3221 is embedded in the first opening 3211 through the stepped surface 3212 to achieve radial limiting, ensuring that its rotation center coincides with the axis of the filter body 31, avoiding vibration and noise caused by eccentric rotation, and improving rotation smoothness. The transmission part is located on the outer peripheral surface of the protruding top frame 321, so that the meshing part of the drive 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.

[0176] In one embodiment, such as Figures 1-3 As shown, the bottom support component 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 body 31 to move along the axial direction through the tray 333.

[0177] This application enables the filter device 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 body 31 respectively.

[0178] The first state is the installation or maintenance state of the filter device 30, and the second state is the working and locked state of the filter device 30. This division structurally decouples the space transfer requirements of the filter device 30 in the installation or maintenance state from the rigid coupling requirements of the working and locked state of the filter device 30.

[0179] In the first state, by controlling the tray 333 to be at a lower first height, an axial gap sufficient for the filter body 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 placement and removal of the filter body 31.

[0180] In the first state, the user's operation of changing the filter can be simplified to a simple "horizontal pick-up and drop", which improves the convenience of the filter body 31 and enhances the user experience.

[0181] 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 body 31 to be synchronously limited by the upper first transmission structure 3221 and the lower tray 333, thus clamping it between the two.

[0182] In the second state, the filter body 31 is axially limited, which effectively prevents axial movement, radial eccentricity, or circumferential slippage that may occur during high-speed rotation of the filter body 31. This ensures smooth and uniform rotation of the filter body 31, significantly reducing operating noise and overall machine vibration caused by vibration and eccentricity, while also ensuring the uniformity of airflow through the filter and improving the consistency of purification effect.

[0183] In summary, the filter device 30 employs a dual-state switching design, balancing the convenience of filter replacement with operational stability. In the first state, the tray 333 is in a low position, allowing the filter body 31 to move freely horizontally. This enables quick and easy placement and removal without disassembling other components, completely resolving the cumbersome process of traditional filter replacement. In the second state, the tray 333 rises, clamping the filter body 31 between the first transmission structure 3221 and the tray 333, forming a stable clamping position. This prevents displacement and eccentricity during filter rotation, ensuring smooth operation. The clamped filter body 31 also provides more stable rotational drive force transmission, preventing power loss and noise caused by filter 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.

[0184] Since the filter body 31 can rise to cooperate with the first transmission structure 3221 of the top support component 32, the drive component 322 can be set on the top support component 32 on the upper side of the filter device 30, so as to achieve a better driving effect that is not affected by the gravity of the filter body 31 itself.

[0185] The lifting module 332 drives the tray 333 to move the filter body 31 axially, which can realize the automatic cooperation between the filter body 31 and the drive component 322. The operation is convenient and ensures that the filter body 31 can rotate under the drive of the drive component 322.

[0186] The axial lifting function can adaptively adjust the distance between the tray 333 and the first transmission structure 3221, ensuring that both can limit the filter body 31 axially. The filter body 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. With the coaxial rotation drive of the first transmission structure 3221, it is ensured that the filter body 31 always rotates around the preset axis without any eccentricity or vibration.

[0187] In one embodiment, such as Figures 1-3 , Figure 5 and Figure 6 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.

[0188] 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, clearly separating it from the external environment and other functional areas within the equipment.

[0189] 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.

[0190] 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 drive component 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 will not shift or be damaged.

[0191] In one embodiment, such as Figure 6 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.

[0192] 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 coming into contact with the internal structure of the filter device 30.

[0193] The mesh cover 324 covers the purification outlet 3230, effectively preventing foreign objects from falling into the internal space of the filter device 30, further enhancing the protection of the filter device 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.

[0194] In one embodiment, such as Figure 2 , Figure 3 and Figure 5 As shown, a rotating shaft 3231 is provided at the center of the cover 323. The first transmission structure 3221 rotates around the rotating shaft 3231 through a central hole or bearing.

[0195] 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 body 31, and the central air duct axis of the equipment, achieving coaxial transmission.

[0196] 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.

[0197] 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 the preset axis and is completely coincident with the axis of the filter body 31, eliminating the problem of eccentric rotation and improving rotation smoothness.

[0198] Meanwhile, an extension rib 3232 connects the rotating shaft 3231 and the cover 323, connecting and reinforcing the main body of the rotating shaft 3231 and the cover 323. The extension rib 3232 strengthens the connection between the rotating shaft 3231 and the cover 323, preventing the rotating shaft 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 rotating shaft 3231 and the extension rib 3232 eliminates the need for additional positioning components, simplifying the structure and reducing production and assembly costs.

[0199] In one embodiment, such as Figure 5 and Figure 6As shown, the cover 323 has a clearance opening 3233. The first transmission structure 3221 is connected to the drive 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 drive motor 3223, allowing the drive 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 components, 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 drive 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.

[0200] In one embodiment, such as Figure 2 and Figure 3 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.

[0201] 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 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.

[0202] 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 drive assembly 322 and reducing wear and tear on transmission components. The sealing structure 32335 also provides some buffering and vibration damping, absorbing vibrations during the operation of the first transmission structure 3221, reducing vibration noise, and improving the overall quietness of the machine's operation.

[0203] In one embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, the first transmission structure 3221 is vertically and flexibly 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.

[0204] The filter device 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 the action of gravity. In the second state, the tray 333 rises to a second height under the drive of the lifting module 332, and the filter body 31 rises with the tray 333 and drives the first transmission structure 3221 to move upward, so that the ball structure 325 above the first transmission structure 3221 contacts and engages with the lower surface of the cover 323.

[0205] Through the active deformation of the mechanical structure, namely the tray 333, the filter device 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 body 31, respectively.

[0206] The first state is the installation or maintenance state of the filter device 30, and the second state is the working and locked state of the filter device 30. This division structurally decouples the space transfer requirements of the filter device 30 in the installation or maintenance state from the rigid coupling requirements of the working and locked state of the filter device 30.

[0207] In the first state, by controlling the tray 333 to be at a lower first height, a sufficient axial gap is created between the tray 333 and the upper first transmission structure 3221, allowing the filter body 31 to move freely horizontally. This creates the physical conditions for unobstructed placement and removal of the filter body 31. In the first state, the user's filter replacement operation can be simplified to a simple "horizontal placement and removal," improving the convenience of the filter body 31 and enhancing the user experience.

[0208] The switching between states is accomplished by using the lifting mechanism 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 body 31 to be synchronously limited by the upper first transmission structure 3221 and the lower one, thus clamping it between the two.

[0209] In the second state, the filter body 31 is axially limited, which effectively prevents axial movement, radial eccentricity, or circumferential slippage that may occur during high-speed rotation of the filter body 31. This ensures smooth and uniform rotation of the filter body 31, significantly reducing operating noise and overall machine vibration caused by vibration and eccentricity, while also ensuring the uniformity of airflow through the filter and improving the consistency of purification effect.

[0210] In summary, the filter device 30 employs a dual-state switching design, balancing the convenience of filter replacement with operational stability. In the first state, the tray 333 is in a low position, allowing the filter body 31 to move freely horizontally. This enables quick and easy placement and removal without disassembling other components, completely resolving the cumbersome process of traditional filter replacement. In the second state, the tray 333 rises, clamping the filter body 31 between the first transmission structure 3221 and the tray 333, forming a stable clamping position. This prevents displacement and eccentricity during filter rotation, ensuring smooth operation. The clamped filter body 31 also provides more stable rotational drive force transmission, preventing power loss and noise caused by filter 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.

[0211] Since the filter body 31 can rise to cooperate with the first transmission structure 3221 of the top support component 32, the drive component 322 can be set on the top support component 32 on the upper side of the filter device 30 to achieve a better driving effect that is not affected by the gravity of the filter body 31, or the drive component 322 can also be set on the bottom support component 33 on the lower side of the filter device 30.

[0212] 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 body 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.

[0213] The dual-state design perfectly serves the filter 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 the low position during installation, providing maximum unobstructed operating space for filter insertion and making installation easy. Upon entering the second state, the tray 333 rises to automatically complete the docking and pre-tightening of the filter with the first transmission structure 3221, a smooth process providing a superior user experience.

[0214] In the second state, the first transmission structure 3221 is lifted from below by the filter screen and 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.

[0215] 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.

[0216] The liftable design of the first transmission structure 3221, in conjunction with the lifting action of the tray 333, allows for a second state where the first transmission structure 3221 is separated from the top frame 321 during rotation. 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 drive motor 3223, and also reduces friction noise and component wear, extending service life. The dual-state switching design makes filter installation and removal more convenient. When installing the filter body 31, the tray 333 can be moved down and the first transmission structure 3221 moved up simultaneously, providing more space for the filter body 31 installation and allowing for easy user access. In the second state, a rigid transmission chain is formed, ensuring stable power transmission while maintaining both convenience and reliability.

[0217] In one embodiment, such as Figures 2-3 , Figure 5 , Figure 6 and Figure 8 As shown, the drive end structure 32212 is located below the first transmission structure 3221 and is inserted into the filter body 31 along the axial direction. The insertion and engagement achieves circumferential positioning between the filter body 31 and the drive end structure 32212.

[0218] The axial insertion mechanism ensures more precise alignment between the filter body 31 and the drive end structure 32212. Combined with the drive of the lifting module 332, it enables quick insertion and removal, improving ease of assembly and disassembly. The insertion mechanism also provides circumferential limiting, ensuring that the torque of the drive end structure 32212 is efficiently transmitted to the filter body 31, avoiding power loss due to relative sliding. Simultaneously, it ensures synchronous rotation between the filter body 31 and the first transmission structure 3221, improving rotational smoothness. The insertion connection structure is simple, requiring no additional locking components, simplifying the assembly process, reducing production and maintenance costs, and providing strong structural stability suitable for long-term, high-frequency rotational drives.

[0219] In related technologies, the filter body 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. In this application, the drive end structure 32212 and the mating structure are designed as an insertion form along the axis of the filter body 31. The insertion action not only achieves the physical connection between the two, but also restricts their relative circumferential rotation through structural adaptation, forcing the filter body 31 and the drive end structure 32212 to rotate coaxially, thus avoiding eccentricity errors.

[0220] At least one of the filter body 31 or the top support component 32 is movable along the axial direction. When replacing, it can be removed after disengaging from the plug-in connection. This avoids the impact of the traditional fixed plug-in structure on the ease of installation, and also ensures quick and accurate alignment during installation by taking advantage of the natural guiding characteristics of the plug-in structure.

[0221] Therefore, this application achieves circumferential limiting directly through axial insertion, abandoning the traditional friction-driven method, ensuring rotational concentricity from a structural perspective, avoiding eccentric movement, and making rotation smoother; at the same time, the filter body 31 can move along the axis, taking into account the convenience of installation and avoiding the insertion process affecting replacement efficiency.

[0222] In one embodiment, such as Figure 2 , Figure 3 and Figures 5-8 As shown, the cooperating structure and the drive end structure 32212 are located at the rotation center of the filter body 31.

[0223] When using a plug-in connection, if the mating structure deviates from the rotation center of the filter body 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 32212 at the rotation center of the filter body 31, using the rotation axis as the sole reference, the power output direction of the drive end structure 32212 is completely aligned with the rotation direction of the filter body 31, ensuring uniform torque transmission along the axis without lateral force. Simultaneously, the uniqueness of the axis limits radial offset of the mating structure, working in conjunction with the axial plug-in structure to prevent radial misalignment during plugging, ensuring complete coaxiality after mating. This further strengthens concentricity assurance, completely resolving the rotational vibration problem caused by force offset in existing technologies, making the rotation of the filter body 31 more stable, reducing local wear on the mating structure, and extending its service life.

[0224] In one embodiment, such as Figures 2-8 As shown, one of the mating structure and the drive end structure 32212 is formed as a socket 3121 or a recess, and the other is formed as a protrusion extending along the axial direction. The protrusion 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 and the insertion hole 3121 or the insertion recess is less than the distance that the filter body 31 can move relative to the top support assembly 32 within the housing along the axial direction, allowing sufficient separation stroke. When the filter body 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 to separate" or "too shallow to cause transmission failure".

[0225] 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 body 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 smoother, improving the ease of use.

[0226] In one embodiment, such as Figures 4-8 As shown, multiple first limiting ribs 31211 are formed in the inner wall of the insertion hole 3121 or the insertion recess, extending axially and spaced apart. Multiple second limiting ribs 322121 are formed on the insertion protrusion, extending axially and spaced apart. When the insertion protrusion is inserted into the insertion hole 3121 or the insertion recess, the second limiting ribs 322121 are inserted between two adjacent first limiting ribs 31211.

[0227] Simple surface contact between a "hole or insertion recess and insertion protrusion" offers limited circumferential constraint, which can lead to slippage and increased transmission clearance over long-term use, affecting rotational smoothness. This application strengthens circumferential limiting through a rib meshing design: A first limiting rib 31211 and a second limiting rib 322121 extending axially are respectively provided on the inner wall of the hole or insertion recess and on the insertion protrusion. During insertion, the second limiting rib 322121 precisely inserts into the gap between adjacent first limiting ribs 31211, forming a "gear-like" fit, preventing relative circumferential rotation. The axial extension of the ribs does not disrupt the insertion guidance and enhances the rigidity of the mating structure. The circumferentially spaced distribution of multiple ribs evenly distributes the limiting force, avoiding localized stress concentration. Therefore, the rib meshing fit increases the contact area and constraint force of circumferential limiting, preventing transmission slippage, allowing for more direct torque transmission, while simultaneously improving structural rigidity, reducing rotational deformation, and further ensuring rotational smoothness.

[0228] In one embodiment, such as Figure 4As 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 body 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 minor machining errors and installation deviations, preventing the ribs from being forcibly jammed, and without affecting the circumferential limiting effect. Therefore, this application allows for a reasonable assembly allowance when the second limiting rib 322121 is inserted, which can accommodate slight processing errors and prevent the rib from getting stuck; the uniform arrangement ensures balanced circumferential force and no local stress concentration, preventing the filter body 31 from shifting due to uneven force and ensuring rotational concentricity.

[0229] Optimizing only the arrangement and spacing of the first limiting rib 31211 may still lead to circumferential force imbalance, interlocking, or rib compression and wear due to insufficient clearance if the second limiting rib 322121 is unevenly distributed or improperly spaced. In one embodiment, such as Figure 8 As 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 body 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 are bidirectionally symmetrical during engagement, with no local stress concentration, thus doubly reinforcing concentricity constraints from both the drive end and the filter 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 rib 322121" of the first limiting rib 31211, providing double pre-reserved assembly clearance. This maximizes the adaptation to processing errors, installation deviations, and slight wear after long-term use, preventing the ribs from jamming or becoming too tightly engaged.

[0230] Even with ribs evenly distributed circumferentially and pre-reserved assembly gaps, misalignment may still occur during insertion due to direct collision between the rib end faces, leading to insertion jamming or damage to the rib edges, affecting ease of operation and structural lifespan. In one embodiment, such as... Figure 4As 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 to both sides in the insertion direction. By providing guide slopes 3401 on the first limiting rib 31211 and / or the second limiting rib 322121, and by obliquely inclining from the center of the rib to both sides in the insertion direction, the guide slopes allow the end face of the rib to first contact the rib during insertion, automatically correcting slight alignment deviations and guiding the rib to smoothly slide into the mating gap, avoiding hard-hitting interference. The guide slopes 3401 change the rib engagement from "hard end face contact" to "progressive oblique surface contact," dispersing the impact force during insertion, reducing wear and damage to the rib edges, while maintaining the circumferential limiting area after engagement, ensuring torque transmission efficiency.

[0231] The guide bevel 3401 guides the protruding ribs to automatically align during insertion, reducing insertion resistance and avoiding structural damage caused by forceful insertion. The guide bevel 3401 makes the fit smoother, improving installation convenience and ensuring precise engagement of the protruding ribs after insertion, without affecting the circumferential limiting effect, and indirectly ensuring smooth rotation.

[0232] In other embodiments, the insertion protrusion 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 body 31 and the drive end structure 32212, avoiding wobbling during rotation and making rotation more stable.

[0233] During initial insertion, radial misalignment of the insertion hole 3121 or the insertion recess and protrusion may still cause alignment difficulties, or even result in a hard impact, damaging the edges of the mating structure; especially when the user manually installs the filter, it is difficult to accurately control the radial position, affecting the smoothness of operation. In one embodiment, such as Figure 1 , Figure 2 and Figure 5 As shown, the insertion protrusion includes a guide portion 3402, which extends obliquely outward from the insertion protrusion in the insertion direction.

[0234] 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 during the insertion process through the radial component of the contact 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, without changing the precise mating structure at the rear end, ensuring reliable circumferential limiting and coaxial positioning after insertion.

[0235] The guide part 3402 assists in precise alignment during insertion, guiding the insertion protrusion to quickly enter the insertion hole 3121 or insertion recess, reducing alignment difficulty; avoiding jamming during insertion, improving installation convenience, while protecting the edges of the mating structure, reducing wear, and ensuring mating accuracy after long-term use.

[0236] In one embodiment, such as Figures 2-5 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. The guide portion 3402 and the guide fitting portion 3403 together expand the initial alignment range, guiding them to fit precisely.

[0237] In some embodiments, the tilt angle of the guide mating part 3403 is adapted to the guide part 3402 of the insertion protrusion. 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 ribs and splines. 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 is precisely connected to the internal structure of the insertion hole 3121 or the insertion recess, ensuring both ease of assembly and without affecting circumferential limiting and coaxial positioning accuracy.

[0238] The guide mating part 3403 and the guide part 3402 of the insertion protrusion form a double guide, which further improves the insertion alignment efficiency and makes the filter body 31 move up and down more smoothly. The guide mating part 3403 can correct slight installation misalignment and ensure that the drive end structure 32212 and the mating structure are precisely coaxial, ensuring rotational concentricity.

[0239] In one embodiment, such as Figures 2-7 As shown, the insertion hole 3121 or insertion recess is formed on the filter body 31, which reduces the number of additional connecting parts of the filter body 31, simplifies the structure of the filter body 31, and reduces replacement costs.

[0240] In other embodiments, the insertion protrusion is arranged around the rotation center of the filter body 31, that is, the insertion protrusion 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 body 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.

[0241] In some embodiments, the insertion protrusions include a plurality of protrusions arranged around the rotation center of the filter body 31 and uniformly distributed circumferentially. That is, multiple insertion protrusions with the same structural shape can simultaneously engage with the insertion hole 3121 or the insertion recess, achieving the same purpose. This ensures balanced circumferential force, with each insertion protrusion sharing the torque and avoiding stress concentration in a single mating structure; the uniform distribution ensures symmetrical force on the filter body 31, eliminating off-center loads during rotation, solving the problem of uneven rotation, and simultaneously improving the load-bearing capacity of the mating structure.

[0242] In one embodiment, such as Figure 5 As shown, the filter body 31 includes a cylindrical filter cotton 311 and end cap structures located on both axial sides of the filter cotton 311, with the mating structure formed on the end cap structures.

[0243] If the mating structure is formed directly on the filter cotton 311, the filter cotton 311 is soft and loose in structure, and cannot provide a stable installation reference and torque bearing capacity. This can easily lead to the mating structure shifting and deforming, and destroying concentricity. At the same time, the filter cotton 311 is unrestrained axially, and it is easy to shift and wrinkle when rotating, which affects the filtration effect and rotation smoothness.

[0244] The filter body features end caps on both axial sides, made of rigid material to provide a stable mounting surface for the mating structure. This prevents the mating structure from shifting due to deformation of the filter cotton 311, ensuring precise coaxiality between the mating structure and the rotation center of the filter body 31. The end caps fit snugly against the axial end faces of the filter cotton 311, fixing it in place through positioning and snap-fitting. This restricts axial displacement and radial deformation of the filter cotton 311, maintaining the integrity of the cylindrical structure of the filter body 31 and preventing airflow turbulence or increased rotational resistance caused by wrinkles or shifts in the filter cotton 311 during rotation.

[0245] With the end caps forming the structure, the driving torque is evenly transmitted to the entire filter cotton 311 through the end caps, 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 body 31 and avoiding eccentricity caused by unilateral force.

[0246] In one embodiment, such as Figure 5 As 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.

[0247] The reinforcing ribs 3123 are arranged radially and circumferentially, with one end connected to the mating structure at the center and the other end connected to the edge of the end cap body 3122, forming a "center-edge" force transmission path, which disperses the driving torque from the mating structure to the entire end cap body 3122, and avoids deformation or breakage of the mating structure due to stress concentration around the mating structure.

[0248] The reinforcing rib 3123 is integrally formed with the end cap body 3122, which is equivalent to building a rigid support skeleton inside the end cap, greatly improving the end cap's resistance to torsion and warping. Even when subjected to large driving torque, it can maintain the flatness of the end cap and the coaxial accuracy of the mating structure.

[0249] The matching structure is precisely set in the central area of ​​the end cap body 3122 and is coaxial with the radial extension path of the reinforcing rib 3123, ensuring that the torque transmission direction is completely coincident with the rotation axis of the filter body 31, thus locking the concentricity benchmark at the end cap structure level.

[0250] The reinforcing ribs 3123 and the end cap body 3122 can be injection molded in one step, without additional assembly processes, thus not increasing production complexity. This also avoids increased defect rates due to end cap deformation, balancing structural performance and production costs. The reinforcing ribs 3123 of the upper end cap 312 radially distribute the force on the mating structure, preventing breakage or deformation due to torque and ensuring long-term stability. The circumferentially spaced reinforcing ribs 3123 ensure balanced force distribution on the end cap, without affecting the concentricity of the filter body 31, while also reducing the end cap weight and driving load, and providing space for airflow within the end cap body 3122.

[0251] In one embodiment, such as Figure 5 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.

[0252] The lack of radial limiting structure between the upper end cap 312 and the filter cotton 311 makes the filter cotton 311 prone to radial displacement and eccentricity relative to the end cap during rotation, resulting in a decrease in the overall concentricity of the filter body 31. Simultaneously, the gap between the filter cotton 311 and the end cap causes 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 body 31. The positioning ring 31221 and the inner / outer ring of the filter cotton 311 are interference-fitted or clearance-fitted to restrict the radial movement and circumferential movement of the filter cotton 311, and to prevent the filter cotton 311 from shifting or wrinkling due to centrifugal force or airflow impact during rotation, thus maintaining the integrity of the cylindrical structure of the filter body 31. The contact surface between the positioning ring 31221 and the filter cotton 311 forms an annular sealing strip, which fills the radial gap between the end cap body 3122 and the filter cotton 311, reduces the direct discharge of unfiltered airflow from the gap, and improves the effectiveness of airflow passing through the filter cotton 311.

[0253] The positioning ring 31221 and the end cap body 3122 are integrally injection molded, requiring no additional parts and production processes. This improves performance while controlling production costs, making it suitable for mass production. The positioning ring 31221 fixes the relative position of the filter cotton 311 and the end cap, preventing displacement of the filter cotton 311 and thus avoiding overall eccentricity of the filter body 31, ensuring rotational concentricity from the outset. The positioning ring 31221 also enhances the structural integrity of the filter body 31, preventing the filter cotton 311 from separating from the end cap during rotation and improving rotational stability.

[0254] In one embodiment, such as Figure 2 and Figure 3 As shown, the reinforcing rib 3123 extends obliquely away from the end cap body 3122 in the direction close to the mating structure.

[0255] The inclined reinforcing ribs 3123 form an "oblique support skeleton". Compared with straight ribs, their supporting force can be decomposed into radial and axial components. This can effectively disperse the torque transmitted by the mating structure and resist the axial impact force generated during insertion, greatly improving the end cap's torsional and impact resistance and preventing the mating structure from shifting due to uneven force.

[0256] The reinforcing ribs 3123 are radially inclined around the mating structure and are evenly spaced in the circumference to ensure that the supporting force of each reinforcing rib 3123 is consistent, maintain the coaxiality of the mating structure and the end cap body 3122, and lock the concentricity reference of the filter body 31 from the internal structure level of the end cap.

[0257] The inclined design enhances the torsional resistance of the reinforcing rib 3123, further improves the stability of the mating structure, and ensures smooth force transmission when the filter body 31 rotates. The setting of the reinforcing rib 3123 makes the mating structure closer to the drive end structure 32212, which makes it easier for the two to be inserted and mated.

[0258] In one embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the filter body 31 extends vertically along its axial direction. The top support assembly 32 is located above the filter body 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 drive assembly 322 includes a drive 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 32212 is located below the first transmission structure 3221. The drive end structure 32212 passes through the first opening 3211 and cooperates with the filter body 31. Under the drive of the drive motor 3223, the first transmission structure 3221 rotates synchronously with the filter body 31 around the rotation center of the filter body 31.

[0259] The structural layout above the top frame 321 makes full use of the vertical space inside the outer shell 10, avoiding interference between the drive component 322 and the air inlet and outlet paths, and ensuring smooth airflow. The drive end structure 32212 set below the first transmission structure 3221 passes through the first opening 3211 and cooperates with the filter body 31, shortening the transmission path between the two, reducing transmission error, improving concentricity, and making the rotation smoother.

[0260] In some embodiments, a rotatable tray 333 is provided below the filter body. This application decouples the gravity bearing and rotation drive tasks of the filter body 31 into two independent functional components. The tray 333 of the bottom support component 33 serves as a dedicated gravity bearing structure, directly bearing the entire weight load of the cylindrical filter body 31. The gravity of the filter body 31 is transferred to the bottom frame 331 through the tray 333, and finally stably supported by the outer shell 10. The drive component 322 of the top support component 32 only undertakes the single task of "providing rotational torque" and does not need to work against the gravity of the filter. Structurally, the connection between the gravity of the filter and the drive torque is severed, completely avoiding the structural contradiction of "the drive component 322 both bearing weight and transmitting force" in the traditional lower drive mode, and creating a low-load working environment for the drive component 322.

[0261] The drive assembly 322 does not need to contend with the gravity of the filter screen; it only needs to output rotational torque to drive the filter body 31. This avoids technical malfunctions such as jamming, uneven speed, and inability to rotate caused by gravity load in traditional bottom-drive modes. It can be used to drive large-diameter, high-density, high-efficiency filters, solving the problem of insufficient motor torque and improving operational smoothness. It also extends the lifespan of the drive assembly 322 and reduces energy consumption.

[0262] 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 body 31, which can realize the function of gravity bearing without hindering the rotation of the filter, and at the same time, it does not generate rotational resistance, realizing the coordinated work of the tray 333 in bearing and following.

[0263] The filter device 30 adopts a modular design consisting of a top support assembly 32, a bottom support assembly 33, and a filter body 31. The top support assembly 32 integrates the driving function and the function of limiting the upper airflow, while the bottom support assembly 33 integrates the load-bearing function and the function of limiting the lower airflow. The filter body 31 is positioned between the two. This structure clearly defines the functional boundaries of each component. During assembly, the two main components can be fixed inside the housing 10 first, and then the filter body 31 can be installed, simplifying the assembly process. During maintenance, any module can be disassembled and installed individually, effectively simplifying the assembly process and significantly reducing the difficulty of maintenance.

[0264] Furthermore, the top-driven layout provides more space below the bottom frame 331 inside the shell 10, enabling structural avoidance.

[0265] In summary, this application overturns the traditional layout where the filter body 31 is driven by the lower tray 333. Instead, it integrates the drive component 322 into the top frame 321, so that the weight of the filter body 31 is supported by the lower tray 333. The drive component 322 does not need to work against the weight of the filter, thus completely solving the problem of insufficient motor torque caused by gravity in the lower drive. The smoothness of the filter rotation is significantly improved, avoiding malfunctions such as jamming or even failure to rotate.

[0266] In one embodiment, such as Figure 5 , Figure 6 and Figure 8 As 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 drive end structure 32212 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.

[0267] If the first transmission structure 3221 adopts a solid plate design, it will obstruct the top air outlet, increase the structural weight, and the stress distribution of the solid structure will be uneven, making it prone to deformation under high torque conditions. It will be difficult to balance the coaxial installation of the drive end structure 32212 and the transmission efficiency. Designing the transmission body 32213 as a ring shape will significantly reduce the weight, reduce the load and energy consumption of the drive motor 3223, and leave a flow channel for the top airflow, avoiding the obstruction of the upper air outlet 101 which would increase airflow resistance. The first mounting part 32211 is set at the center of the transmission body 32213, and the drive end structure 32212 is precisely positioned below it, ensuring that the axes of the two are completely coincident. The connecting ribs 32214 extend radially and are evenly distributed circumferentially, rigidly connecting the first mounting part 32211 and the transmission body 32213, ensuring no radial offset during power transmission and uniform torque transmission, avoiding stress concentration. This ensures that the drive end structure 32212 is coaxial with the rotation center of the filter body 31, eliminating radial sway during transmission and improving rotational smoothness; the ring structure does not obstruct the air outlet, improving ventilation efficiency, and the lightweight design reduces rotational inertia, while the connecting rib 32214 enhances the torsional strength of the structure and improves torque bearing capacity.

[0268] According to an embodiment of the present invention, in a second aspect, an air purifier is provided, including a housing and a filter device 30. The housing is provided with an upper air outlet and a lower air outlet, and an air inlet is also provided on the peripheral wall. A top support assembly 32 has an upper purification outlet 3230 that communicates with the upper air outlet, and a bottom support assembly 33 has a lower purification outlet 3311 that communicates with the lower air outlet. The filter body 31 corresponds to the air inlet.

[0269] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined in this application.

Claims

1. A filtration device, characterized in that, include: The top support assembly includes a rotatably configured upper mating structure; A bottom support assembly, comprising a lifting module and a tray disposed above the lifting module and having relative movement with the lifting module. The filter body is disposed between the tray and the upper mating structure. The filtration device includes a first state and a second state. In the first state, the tray is located at a first height, and the filter body is movably disposed between the upper mating structure and the tray in a horizontal direction. In the second state, the tray is raised to a second height under the drive of the lifting module, and the filter body is sandwiched between the upper mating structure and the tray.

2. The filtration device according to claim 1, characterized in that, The bottom support component includes: A bottom frame is fixedly installed and has a lower purification outlet formed thereon. A tray is arranged around the lower purification outlet, and a lifting module is arranged between the tray and the bottom frame.

3. The filtration device according to claim 2, characterized in that, The lifting module includes: A rotary switch is movably disposed above the bottom frame between an open position and a locked position. In the first state, the rotary switch is located in the open position, and in the second state, the rotary switch is located in the locked position.

4. The filtration device according to claim 3, characterized in that, The bottom frame is provided with a first driving slope, and the rotary switch rotates between the open position and the locked position while sliding up and down above the first driving slope.

5. The filtration device according to claim 4, characterized in that, A first protrusion is formed on the bottom frame, and a first driving slope inclined in the circumferential direction is formed on the first protrusion. A first groove is formed on the lower surface of the rotary switch. In the first state, the first protrusion is accommodated in the first groove.

6. The filtration device according to claim 3, characterized in that, The lifting module includes: A slider structure is vertically movable between the tray and the rotary switch. The upper surface of the rotary switch is provided with a second driving slope. While the rotary switch rotates between the open position and the locked position, the slider structure slides up and down above the second driving slope.

7. The filtration device according to claim 6, characterized in that, The rotary switch has a second protrusion, and the second protrusion has a second driving slope that is inclined in the circumferential direction. The lower surface of the slider structure has a second groove. In the first state, the second protrusion is accommodated in the second groove.

8. The filtration device according to claim 7, characterized in that, A first protrusion is formed on the bottom frame, and a first driving slope inclined in the circumferential direction is formed on the first protrusion. The inner wall of the second protrusion is empty to form a first groove on the lower surface of the rotary switch. In the first state, the first protrusion is accommodated in the first groove.

9. The filtration device according to claim 6, characterized in that, The bottom frame is provided with a second mounting part around the lower purification outlet. The lifting module is sleeved on the outside of the second mounting part. A guide rail structure extending vertically is formed on the second mounting part. The slider structure cooperates with the guide rail and moves along the extension direction of the guide rail.

10. The filtration device according to claim 3, characterized in that, The lifting module further includes: a lever, which slides between an unlocked position and a locked position along a horizontal first direction; the rotary switch has a long sliding hole; the lever has a pin extending vertically; the pin is inserted into the long sliding hole and slides in cooperation with the long sliding hole.

11. The filtration device according to claim 10, characterized in that, The elongated sliding hole extends radially along the rotary switch; And / or, the pin is movably engaged with the elongated sliding hole in a vertical manner.

12. The filtration device according to claim 10, characterized in that, The bottom support assembly is provided with a guide hole extending in a first direction, the lever is slidably engaged with the guide hole, and the lever is provided with a limiting groove that engages with the edge of the guide hole.

13. The filtration device according to claim 2, characterized in that, The bottom frame is provided with a second mounting part around the lower purification outlet, the lifting module is sleeved on the outside of the second mounting part, and the tray is located above the second mounting part.

14. The filtration device according to claim 13, characterized in that, The outer edge of the tray is provided with a first flange extending downward, and the first flange and the second mounting part define a first receiving space for accommodating the lifting module.

15. The filtration device according to claim 14, characterized in that, A ball bearing assembly is provided between the tray and the lifting module. The ball bearing assembly includes multiple balls, and at least a portion of the multiple balls are located at the angle between the first flange and the tray.

16. The filtration device according to claim 13, characterized in that, The inner edge of the tray is provided with a downwardly extending second flange, and a second receiving space for accommodating the sealing structure is defined between the second flange and the second mounting part.

17. The filtration device according to claim 2, characterized in that, It also includes a top cover, which is located above the bottom frame and has a second opening, through which the tray passes and engages with the filter body; In the first state, the tray is at the same height as the top cover.

18. An air purifier, characterized in that, The filter includes a housing and a filter device as described in any one of claims 1-17. The housing is provided with an upper air outlet and a lower air outlet, and an air inlet is also provided on the peripheral wall. An upper purification outlet communicating with the upper air outlet is formed on the top support assembly of the filter device, and a lower purification outlet communicating with the lower air outlet is formed on the bottom support assembly. The filter body corresponds to the air inlet.

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