Air purifier

Abstract

The application relates to the technical field of air purification equipment, and discloses an air purifier which comprises a shell, an upper fan assembly, a lower fan assembly and a filter module; the middle part of the shell is provided with an air inlet, and the top and bottom of the shell are respectively provided with an upper air outlet and a lower air outlet; the filter module comprises a filter screen support structure and a filter screen arranged at the air inlet; the filter screen support structure is inserted and positioned above the lower fan assembly, the upper fan assembly is inserted and positioned above the filter screen support structure, and the three are detachably connected and fixed through connecting pieces. Through the above design, the problem that dust on the ground is easily sucked into the bottom air inlet and the problem that the middle air outlet directly blows at a user are avoided. In addition, the filter screen support structure, the lower fan assembly and the upper fan assembly are preliminarily positioned through the plug-in mode, and are detachably connected through the connecting pieces, so that the assembly efficiency is higher, the disassembly and assembly are convenient, the modular design of the filter module and the two fan assemblies can be realized, the overall disassembly and assembly are convenient, and the maintenance efficiency is improved.

Description

Technical Field

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

[0002] Air purifiers, as devices used to improve indoor air quality, typically use fans to drive airflow and internal filters to adsorb or convert pollutants. Their air intake and exhaust methods directly affect purification efficiency and user experience.

[0003] Traditional air purifiers often employ a single-sided or unidirectional air intake structure, which restricts airflow and can easily create dead zones when cleaning large or complex spaces, thus limiting purification efficiency. To improve air circulation, some air purifiers with multi-directional air intake structures have emerged, such as designs that allow simultaneous air intake from the bottom and top, and air outlet from the middle. This type of design increases the air intake area to some extent, accelerates the indoor air circulation rate, and thus improves the purification capacity per unit time.

[0004] However, the aforementioned structure still has significant limitations. First, when the bottom air inlet draws in air from near the ground, it easily draws in larger particles such as dust and hair that have settled on the ground directly into the machine. These particles tend to accumulate quickly on the filter surface, increasing air resistance, leading to higher energy consumption, and accelerating filter clogging, thus shortening its effective lifespan. Second, while the central air outlet design facilitates air diffusion in the middle of the room, the airflow direction is relatively concentrated and directly faces the breathing zone of a person sitting or lying down. In scenarios requiring continuous quiet and a draft-free environment, such as sleeping or working, the direct airflow can easily cause discomfort and disturb the user's rest or work, resulting in a poor user experience. Furthermore, existing multi-fan air purifiers have low assembly efficiency and are inconvenient to assemble and disassemble. Summary of the Invention

[0005] In view of this, the present invention provides an air purifier to solve the problems of unreasonable air intake and exhaust design of existing air purifiers, which easily suck in ground dust and blow it directly on users, as well as the problems of low assembly efficiency and inconvenient disassembly and assembly of multi-fan air purifiers.

[0006] In a first aspect, the present invention provides an air purifier, comprising:

[0007] The outer casing has an air inlet in the middle, and an upper air outlet and a lower air outlet at the top and bottom, respectively.

[0008] The upper fan assembly, housed within the housing, is used to drive external air to flow from the air inlet to the air outlet.

[0009] The downdraft fan assembly, housed within the housing, is used to drive external air to flow from the air inlet to the air outlet.

[0010] The filter module includes a filter support structure and a filter screen disposed at the air inlet, wherein a filter screen installation space is formed within the filter support structure, and the filter screen is installed within the filter screen installation space;

[0011] The filter support structure is inserted and positioned above the lower fan assembly and is detachably connected and fixed by a connector; and / or, the upper fan assembly is inserted and positioned above the filter support structure and is detachably connected and fixed by a connector.

[0012] The air purifier also includes:

[0013] The deodorization module is integrated into the outlet of the downdraft fan assembly, which has a downdraft duct.

[0014] The deodorization module includes a plasma generator, which can generate plasma by discharge to decompose odors in the air.

[0015] The plasma generating device includes:

[0016] The mounting bracket forms an electrode mounting area;

[0017] Several electrode structures are arranged at intervals along the length of the mounting frame in the electrode mounting area;

[0018] There is a discharge gap between two adjacent electrode structures and between the electrode structure and the mounting bracket to allow airflow.

[0019] Beneficial Effects: This application employs a central air intake and top and bottom air outlet design. Compared to top and bottom air intake and central air outlet purification methods, this effectively avoids the problems associated with bottom air intake, which can easily draw dust, hair, and other foreign objects from the ground directly into the filter, causing filter blockage and even affecting filter performance and lifespan. This reduces the frequency of filter cleaning, extends filter lifespan, and lowers maintenance costs. On the other hand, traditional central air outlet designs often produce a strong direct airflow sensation, which can easily cause user discomfort or even interfere with concentration in quiet environments such as sleeping or working. However, the central air intake and top and bottom air outlet design of this application allows purified air to be delivered from the top and bottom simultaneously, forming a "surrounding" airflow purification path indoors. This ensures that purified air evenly surrounds the user, completely eliminating direct airflow interference. It is particularly suitable for quiet environments such as sleeping and working, achieving "imperceptible purification," significantly improving user comfort, and enhancing the adaptability of the air purifier in various environmental applications to meet the needs of different users in various usage scenarios.

[0020] Furthermore, the filter module installed at the air inlet effectively removes particulate pollutants such as PM2.5, pollen, and dust from the air, which is fundamental to ensuring the quality of the exhaust air. Because it uses a single central air intake, only one filter module needs to be installed at the air inlet. Compared to existing systems with top and bottom air intakes that require two separate filter modules, this simplifies the overall structure and reduces material costs and the complexity of filter maintenance.

[0021] In addition, the filter support structure and the lower and upper fan components are initially positioned by plugging them in, and then detachably connected by connectors, which improves assembly efficiency and facilitates disassembly and assembly. Furthermore, the filter support structure and the lower and upper fan components are connected as one unit, which enables the modular design of the filter module and the two fan components, making it easy to disassemble and assemble the whole and improve maintenance efficiency.

[0022] Furthermore, by integrating the deodorization module at the outlet of the downdraft, the space at the end of the downdraft can be fully utilized, avoiding the need for separate additional installation space. This makes the overall structure more compact and space-efficient. It also enables modular integrated design, allowing the deodorization module and the downdraft to form an integrated structure, reducing assembly steps, making installation convenient and efficient, improving production efficiency, and reducing the error rate during installation.

[0023] Furthermore, the multiple electrode structures spaced along the length of the mounting frame create a large plasma generation area, increasing the plasma reaction area and improving processing efficiency. The multiple electrode structures also ensure that the airflow passes through these dense discharge gaps as it flows from the inlet to the outlet, increasing the probability and time for pollutants to collide with the high-energy plasma, resulting in more complete and efficient odor decomposition. Additionally, the design of the discharge gaps allows for normal airflow, preventing excessive resistance to the air duct caused by overly dense structures, which could affect the overall airflow.

[0024] In one optional implementation, the filter support structure includes:

[0025] The bottom support assembly, the top support assembly, and the intermediate support frame disposed between the bottom support assembly and the top support assembly together enclose and form a filter installation space;

[0026] The top support assembly is provided with a first insertion part, and the upper fan assembly is correspondingly provided with a first insertion mating part, wherein one of the first insertion part and the first insertion mating part is a slot and the other is an insertion protrusion; and / or

[0027] The bottom support assembly is provided with a second insertion part, and the lower fan assembly is provided with a corresponding second insertion mating part. One of the second insertion part and the second insertion mating part is a slot and the other is an insertion protrusion.

[0028] Beneficial effects: The filter support structure and the lower and upper fan components are positioned by using slots and plug-in ribs, which is simple in structure and highly efficient in positioning.

[0029] In one alternative embodiment, the down fan assembly includes a first fan and a first bracket for mounting the first fan; the filter support structure is inserted and positioned above the first bracket and fixed by screws.

[0030] Beneficial effects: The filter support structure is fixed to the first bracket with screws, which makes the connection reliable and easy to disassemble and assemble.

[0031] In one optional embodiment, the plasma generator is installed on the outer periphery of the first bracket and corresponds to the lower air outlet. The plasma generator and the first bracket enclose each other to form a lower air duct.

[0032] The downdraft duct connects the air inlet and the downdraft outlet, and the first fan is located inside the downdraft duct.

[0033] Beneficial effects: By integrating the deodorization module with the downdraft fan assembly, the first bracket not only secures the fan but also serves as the mounting base for the duct wall and the deodorization module. This achieves modular and integrated design of functional components, significantly saving internal space and making the overall layout more rational and compact, with higher space utilization. Furthermore, by directly placing the plasma generator inside the downdraft duct and facing the downdraft outlet, it ensures that all air blown from the bottom passes through the plasma zone, thereby guaranteeing the effectiveness and consistency of deodorization treatment.

[0034] In one alternative implementation, the lower air outlets are distributed on at least two sides of the housing;

[0035] The plasma generator is provided with at least two sets, and the air outlets of the at least two sets of plasma generators are located on at least two sides of the first bracket.

[0036] At least two sets of plasma generating devices are enclosed with the first support to form a downdraft duct that is closed at the bottom, draws air at the top, and discharges air from at least two sides.

[0037] Beneficial Effects: The bottom air outlet features a design with airflow from at least two sides, resulting in a wider airflow direction at the bottom. This allows for faster filling of the entire bottom space with clean air, reducing purification dead zones, improving air exchange efficiency, and achieving multi-directional and uniform bottom airflow. Furthermore, plasma generators are installed in multiple airflow directions, ensuring effective odor decomposition regardless of the airflow direction. This achieves full coverage of odor removal in the bottom airflow area, significantly enhancing the product's ability to handle complex odor environments. In addition, the "bottom-closed, top-suction, multi-directional airflow" duct structure formed by the plasma generator and the first support is highly efficient and rational, conforming to the working characteristics of a centrifugal fan. It effectively guides airflow, gathers purified air from the center, and evenly distributes it from multiple directions.

[0038] In one optional embodiment, the first bracket is a frame structure, and the first bracket is provided with an overflow opening on one side corresponding to the lower air outlet.

[0039] The first support has a slot formed therein, and the plasma generator is inserted into the slot and corresponds to the flow opening.

[0040] Beneficial effects: The first bracket of the frame adopts a slot-type design, which facilitates the plug-and-play installation of the plasma generator as an independent module on the first bracket. This not only ensures a stable and reliable connection but also greatly simplifies the production and assembly process, making it easier for users or maintenance personnel to replace or maintain the plasma generator, reducing after-sales service costs and facilitating production and maintenance. Furthermore, the slot structure design allows for precise positioning, ensuring the accuracy and consistency of the plasma generator's installation location, so that its air outlet surface is precisely aligned with the flow opening on the bracket, guaranteeing smooth airflow.

[0041] In one optional implementation, multiple electrode structures spaced apart along the length of the mounting frame create a large plasma generation area, increasing the plasma reaction area and improving processing efficiency. Furthermore, the multiple electrode structures allow airflow to pass through these dense discharge gaps as it flows from the inlet to the outlet, increasing the probability and time for pollutants to collide with the high-energy plasma, resulting in more complete and efficient odor decomposition. In addition, the design of the discharge gaps allows for normal airflow, preventing excessive resistance to the air duct caused by overly dense structures, which could affect the overall airflow.

[0042] In one alternative embodiment, the upper fan assembly includes a second fan, a second bracket for mounting the second fan, and an upper duct.

[0043] The inlet end of the upper air duct is connected to the upper purification outlet of the filter module, and the outlet end is connected to the upper air outlet. The second fan is located inside the upper air duct.

[0044] The second bracket is installed on the side of the upper air duct away from the filter module. The upper air duct is inserted and positioned above the filter support structure and fixed with screws.

[0045] Beneficial effects: By adopting the design of a second fan, a second bracket, and an upper air duct, the upper fan assembly forms two completely independent drive systems with the lower fan assembly. They can be controlled and adjusted separately, thereby realizing multiple working modes, such as sleep mode using only upper air outlet, and powerful mode using both upper and lower air outlets simultaneously, which greatly increases the product's functional diversity and scenario adaptability.

[0046] In one optional implementation, the filter support structure includes:

[0047] The top support assembly includes a rotatably configured upper mating structure;

[0048] The bottom support assembly includes a lifting module and a tray rotatably disposed above the lifting module;

[0049] The filter screen is disposed between the tray and the upper mating structure; wherein, the filter module includes a first state and a second state. In the first state, the tray is located at a first height, and the filter screen is movably disposed between the upper mating structure and the tray in the horizontal direction. In the second state, the tray is raised to a second height under the drive of the lifting module, and the filter screen is sandwiched between the upper mating structure and the tray.

[0050] Beneficial Effects: The filter module 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 to move freely horizontally. This enables quick and easy replacement without disassembling other components, completely eliminating the cumbersome process of traditional filter replacement. In the second state, the tray rises, clamping the filter between the upper structure and the tray, creating a stable clamping position. This prevents displacement and eccentricity during filter rotation, ensuring smooth operation. The clamped filter also ensures more stable rotational drive force transmission, 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.

[0051] In one optional embodiment, the filter is rotatably disposed within the filter mounting space, and the air purifier further includes:

[0052] An ultraviolet sterilization module is installed on the filter support structure and located on one side of the filter, and is used to perform ultraviolet sterilization on the filter.

[0053] Beneficial effects: By rotatably mounting the filter screen on the filter screen support structure and placing the ultraviolet sterilization module on one side of the filter screen, the entire outer surface of the rotating filter screen can be uniformly irradiated with 360-degree light without dead angles for sterilization, ensuring the thoroughness and efficiency of sterilization and disinfection, effectively inhibiting the growth of bacteria, and ensuring the cleanliness and hygiene of the filter screen.

[0054] In one optional implementation, the air purifier further includes:

[0055] The display module is integrated and installed on the upper fan assembly, and the top of the housing is open to form the upper air outlet;

[0056] The top of the casing is open to form an upper air outlet, and an air outlet grille is installed inside the upper air outlet. The air outlet grille is circular, and a clearance opening is formed in the middle of the air outlet grille to allow the display module to be exposed.

[0057] Beneficial effects: By setting the air outlet grille to be ring-shaped, and the opening in the middle of the ring-shaped air outlet grille serving as a clearance opening for the display module to be exposed, the air outlet and display functions do not interfere with each other, while the clearance opening can also meet the heat dissipation requirements of the display module. Attached Figure Description

[0058] 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.

[0059] Figure 1 A schematic diagram of the external structure of the air purifier in an embodiment of the present invention;

[0060] Figure 2 This is a cross-sectional view of the air purifier in an embodiment of the present invention;

[0061] Figure 3 This is a cross-sectional view of the air purifier after the filter has been removed in an embodiment of the present invention;

[0062] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0063] Figure 5 This is a schematic diagram of the airflow direction of the air purifier in an embodiment of the present invention;

[0064] Figure 6 This is an exploded view of the air purifier in an embodiment of the present invention;

[0065] Figure 7This is a schematic diagram of the air purifier after removing the outer casing in an embodiment of the present invention;

[0066] Figure 8 for Figure 7 A schematic diagram of the structure after removing the filter screen;

[0067] Figure 9 This is an exploded view of the lower fan assembly, the bottom light assembly, and the support base in an embodiment of the present invention;

[0068] Figure 10 This is an exploded view of the upper fan assembly in an embodiment of the present invention;

[0069] Figure 11 This is an exploded view of the display module in an embodiment of the present invention;

[0070] Figure 12 This is a schematic diagram of the upper air outlet grille in an embodiment of the present invention;

[0071] Figure 13 This is a cross-sectional view of the display module in an embodiment of the present invention;

[0072] Figure 14 This is a cross-sectional view of the lamp holder in an embodiment of the present invention;

[0073] Figure 15 This is a schematic diagram of the bottom structure of the lampshade in an embodiment of the present invention;

[0074] Figure 16 This is a bottom view of the display bracket, display panel, and display lamp assembled in an embodiment of the present invention;

[0075] Figure 17 This is an exploded view showing the bracket and decorative panel in an embodiment of the present invention;

[0076] Figure 18 This is a schematic diagram of the structure of a filtering module according to an embodiment of the present invention;

[0077] Figure 19 This is a cross-sectional view of a filtering module according to an embodiment of the present invention;

[0078] Figure 20 This is a cross-sectional view of a filtering module according to an embodiment of the present invention;

[0079] Figure 21 This is a partially enlarged schematic diagram of a filter screen according to an embodiment of the present invention;

[0080] Figure 22 This is a partial cross-sectional view of a filtering module according to an embodiment of the present invention;

[0081] Figure 23 This is an exploded view of a top support component according to an embodiment of the present invention;

[0082] Figure 24 This is a partial structural diagram of a filter screen according to an embodiment of the present invention;

[0083] Figure 25 This is a schematic diagram of a first transmission structure according to an embodiment of the present invention;

[0084] Figure 26 This is an exploded view of a bottom support component according to an embodiment of the present invention;

[0085] Figure 27 This is an exploded view of a bottom support component according to an embodiment of the present invention;

[0086] Figure 28 This is a partial structural diagram of a bottom support component according to an embodiment of the present invention;

[0087] Figure 29 for Figure 28 A magnified view of a portion of the image;

[0088] Figure 30 This is a partial cross-sectional view of a bottom support component according to an embodiment of the present invention;

[0089] Figure 31 for Figure 30 A magnified view of a portion of the image;

[0090] Figure 32 This is a partial cross-sectional view of a bottom support component according to an embodiment of the present invention;

[0091] Figure 33 for Figure 32 A magnified view of a portion of the image;

[0092] Figure 34 This is a partial cross-sectional view of a bottom support component according to an embodiment of the present invention;

[0093] Figure 35 This is a partial cross-sectional view of the bottom support component and the filter screen in an embodiment of the present invention;

[0094] Figure 36 for Figure 35 A magnified view of a portion of the image;

[0095] Figure 37 This is a partial cross-sectional view of the bottom support component and the filter screen in an embodiment of the present invention;

[0096] Figure 38 for Figure 37 A magnified view of a portion of the image;

[0097] Figure 39 This is a schematic diagram of the structure of a rotary switch according to an embodiment of the present invention;

[0098] Figure 40 This is a schematic diagram of the structure of a lever according to an embodiment of the present invention;

[0099] Figure 41 This is a schematic diagram of the structure of a lever according to an embodiment of the present invention;

[0100] Figure 42 This is a schematic diagram of one embodiment of the UV sterilization module and filter screen in this invention.

[0101] Figure 43 This is a schematic diagram of the ultraviolet sterilization module in an embodiment of the present invention;

[0102] Figure 44 This is a schematic diagram of the plasma generating device in an embodiment of the present invention;

[0103] Figure 45 for Figure 44 Exploded view;

[0104] Figure 46 for Figure 44 A schematic diagram of the structure after removing the top cover;

[0105] Figure 47 for Figure 46 A magnified view of a portion of the image;

[0106] Figure 48 This is a schematic diagram of the main structure of the mounting bracket in this embodiment;

[0107] Figure 49 for Figure 46 Another structural diagram;

[0108] Figure 50 for Figure 49 A magnified view of a portion of the image;

[0109] Figure 51 for Figure 46 A schematic diagram of the rear structure;

[0110] Figure 52 This is a schematic diagram of the electrode structure in an embodiment of the present invention;

[0111] Figure 53 This is a schematic diagram of the pressure plate structure in an embodiment of the present invention;

[0112] Figure 54 This is a schematic diagram of the structure of the elastic buffer in an embodiment of the present invention;

[0113] Figure 55 This is a schematic diagram of the low-pressure connecting plate in an embodiment of the present invention;

[0114] Figure 56This is a schematic diagram of the high-voltage connection plate in an embodiment of the present invention.

[0115] Explanation of reference numerals in the attached figures:

[0116] 10. Outer casing; 100. Air inlet; 101. Upper air outlet; 102. Lower air outlet; 104. Guide hole; 11. Air inlet grille; 12. Air outlet grille; 13. Cover plate; 14. Formaldehyde sensor;

[0117] 21. Upper fan assembly; 211. Second fan; 2111. Second motor; 2112. Second fan blade; 212. Upper air duct; 213. Second support frame; 214. Negative ion generator;

[0118] 22. Downstream fan assembly; 221. First fan; 2211. First motor; 2212. First fan blade; 222. First bracket; 2220. Flow opening; 2221. Slot;

[0119] 30. Filtering module;

[0120] 31. Filter screen; 311. Filter cotton; 312. Top cover; 3121. Socket; 31211. First limiting rib; 3122. End cover body; 31221. Positioning ring; 3123. Reinforcing rib;

[0121] 32. Top support component;

[0122] 321. Top frame; 3211. First opening; 3212. Step surface;

[0123] 322. Drive assembly; 3221. First transmission structure; 32211. First mounting part; 32212. Drive structure; 322121. Second limiting rib; 32213. Transmission body; 322131. First transmission gear; 32214. Connecting rib; 3222. Second transmission gear; 3223. Drive motor;

[0124] 323. Cover; 3231. Rotating shaft; 3232. Extension rib; 3230. Upper purification outlet; 3233. Clearance opening;

[0125] 324. Mesh cover; 325. Ball bearing structure;

[0126] 3201, First installation space;

[0127] 33. Bottom support components;

[0128] 331. Bottom frame; 3311. Lower purification outlet; 3312. Second mounting part; 33121. Guide rail structure; 3313. First protrusion; 33131. First driving slope;

[0129] 332. Lifting module;

[0130] 3321, Rotary switch; 33212, Second protrusion; 332121, Second drive ramp; 33213, Long sliding hole;

[0131] 3322, slider structure; 33221, second groove;

[0132] 3323, lever; 33231, pin; 33232, limit groove;

[0133] 333, pallet; 3331, first flange; 3332, second flange;

[0134] 334. Ball bearing; 32335. Sealing structure; 336. Top cover plate; 3361. Second opening;

[0135] 3301, First Accommodation Space; 3302, Second Accommodation Space;

[0136] 34. Intermediate support frame;

[0137] 3401. Guide slope; 3402. Guide section; 3403. Guide mating section;

[0138] 40. Filter self-cleaning assembly; 41. Vacuum cleaner base; 42. Vacuum cleaner assembly;

[0139] 50. Odor removal module;

[0140] 51. Plasma generator;

[0141] 511. Mounting bracket;

[0142] 5111, Mounting bracket body; 51111, Slot; 51112, Cable routing channel; 51113, First limiting rib; 51114, Second limiting rib; 5112, Top cover; 5113, Bottom cover;

[0143] 512. Electrode structure; 5121. Inner electrode; 5122. Insulating tube; 5123. Outer electrode; 5124. Conductive sleeve; 5125. Insulating adhesive;

[0144] 513. Low-voltage connecting plate; 5131. Bayonet;

[0145] 514. High-voltage connection plate; 5141. Connection hole;

[0146] 515, Elastic buffer; 5151, Electrical limit groove; 5152, Through hole; 5153, First mating groove; 5154, Second mating groove;

[0147] 516. Pressure plate; 5161. Buckle;

[0148] 517. Wire;

[0149] 52. Metal mesh cover; 53. Ozone reduction mesh;

[0150] 60. Ultraviolet sterilization module; 61. Ultraviolet lamp; 62. Lamp holder; 63. First baffle; 64. Second baffle;

[0151] 70. Display module;

[0152] 71. Display bracket; 711. Support part; 7110. Light-transmitting opening; 712. Connecting part; 713. Positioning slot; 714. Rotary groove; 715. Locking groove;

[0153] 72. Lampshade; 721. Limiting rib;

[0154] 73. Lamp holder; 731. Positioning rib; 732. Limiting groove;

[0155] 74. Indicator lights;

[0156] 75. Decorative panel; 751. Turnbuckle; 752. Locking protrusion;

[0157] 76. Display panel;

[0158] 77. Air quality lamp;

[0159] 78. Lamp stand;

[0160] 79. Display panel;

[0161] 80. Support base;

[0162] 90. Bottom light assembly; 91. Light strip bracket; 92. Bottom ambient light strip. Detailed Implementation

[0163] 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.

[0164] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0165] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0166] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0167] The following is combined Figures 1 to 56 The following describes embodiments of the present invention.

[0168] According to an embodiment of the present invention, in one aspect, the present invention provides an air purifier, including a housing 10, an upper fan assembly 21, a lower fan assembly 22, and a filter module 30. The housing 10 has an air inlet 100 in the middle, and an upper air outlet 101 and a lower air outlet 102 respectively at the top and bottom. The upper fan assembly 21 is disposed within the housing 10 and is used to drive external air to flow from the air inlet 100 towards the upper air outlet 101. The lower fan assembly 22 is disposed within the housing 10 and is used to drive external air to flow from the air inlet 100 towards the lower air outlet 102. It includes a filter support structure and a filter 31 disposed at the air inlet 100. The filter support structure has a filter installation space formed within it, and the filter 31 is installed within the filter installation space. The filter support structure is inserted and positioned above the lower fan assembly 22 and is detachably connected and fixed by a connector. And / or, the upper fan assembly 21 is inserted and positioned above the filter support structure and is detachably connected and fixed by a connector.

[0169] The air purifier provided in the above embodiments adopts an airflow path design with central air intake and top and bottom air outlets. Compared with the purification method of top and bottom air intake and central air outlet, it can effectively avoid the problem of bottom air intake, which easily sucks in foreign objects such as dust and hair from the ground directly into the filter, causing filter blockage and even affecting filter performance and service life. It reduces the frequency of filter cleaning, extends the filter's service life, and lowers maintenance costs. On the other hand, the traditional central air outlet design usually produces a strong direct airflow, which can easily cause user discomfort or even interfere with concentration in quiet scenarios such as sleeping or working. However, the central air intake and top and bottom air outlet design of this application allows purified air to be delivered from the top and bottom simultaneously, forming a "surround" airflow purification path in the room. This ensures that the purified air is evenly distributed around the user, completely eliminating direct airflow interference. It is particularly suitable for quiet scenarios such as sleeping and working, achieving "imperceptible purification," significantly improving user comfort, and enhancing the adaptability of the air purifier in multiple environmental applications to meet the needs of different users in various usage scenarios.

[0170] Furthermore, the filter module 30 installed at the air inlet 100 effectively removes particulate pollutants such as PM2.5, pollen, and dust from the air, which is fundamental to ensuring the quality of the exhaust air. Because it uses a single central air intake, only one filter module 30 needs to be installed at the air inlet 100. Compared to existing systems with top and bottom air intakes that require two separate filter modules, this simplifies the overall structure and reduces material costs and the complexity of filter maintenance.

[0171] In addition, the filter support structure and the lower and upper fan components are initially positioned by plugging them in, and then detachably connected by connectors, which improves assembly efficiency and facilitates disassembly and assembly. Furthermore, the filter support structure and the lower and upper fan components are connected as one unit, which enables the modular design of the filter module and the two fan components, making it easy to disassemble and assemble the whole and improve maintenance efficiency.

[0172] In some embodiments, the filter support structure includes a bottom support component 33 and a top support component 32, and an intermediate support frame 34 disposed between the bottom support component 33 and the top support component 32. The bottom support component 33, the top support component 32, and the intermediate support frame 34 together enclose a filter installation space. The top support component 32 is provided with a first insertion part, and the upper fan component 21 is provided with a corresponding first insertion mating part. One of the first insertion part and the first insertion mating part is a slot, and the other is an insertion protrusion. The bottom support component 33 is provided with a second insertion part, and the lower fan component 22 is provided with a corresponding second insertion mating part. One of the second insertion part and the second insertion mating part is a slot, and the other is an insertion protrusion.

[0173] In the above embodiments, the filter support structure, the lower fan assembly, and the upper fan assembly are positioned by using slots and plug-in ribs, which is simple in structure and has high positioning efficiency.

[0174] In some embodiments, the downdraft fan assembly 22 includes a first fan 221 and a first bracket 222 for mounting the first fan 221; the filter support structure is inserted and positioned above the first bracket 222 and fixed with screws. The filter support structure and the first bracket are fixed with screws, which ensures a secure connection and facilitates assembly and disassembly.

[0175] In some embodiments, the filter screen is rotatably disposed within the filter screen installation space, and the air purifier further includes an ultraviolet sterilization module 60, which is disposed within the housing 10 and is used to perform ultraviolet sterilization on the filter module 30.

[0176] By rotatably mounting the filter screen on the filter screen support structure and placing the ultraviolet sterilization module on one side of the filter screen, the entire outer surface of the rotating filter screen can be uniformly irradiated with 360-degree light without dead angles for sterilization, ensuring the thoroughness and efficiency of sterilization and disinfection, effectively inhibiting the growth of bacteria, and ensuring the cleanliness and hygiene of the filter screen.

[0177] In some embodiments, the air inlet 100 is arranged around the central peripheral wall of the air purifier; the filter module 30 includes a cylindrical filter 31, which is rotatably disposed inside the housing 10, and the ultraviolet sterilization module 60 is disposed on one side of the filter 31.

[0178] In the above embodiments, the air inlet 100, through its surrounding design, increases the effective air intake area, allowing more air to be purified to quickly enter the equipment. This provides a structural basis for achieving a large air volume and a high clean air output ratio, thereby improving the initial purification efficiency of the entire unit. The cylindrical filter 31 is designed to fit the air inlet 100 circumferentially surrounding the outer casing 10, resulting in a larger filtration area and the ability to handle a larger air volume within the same volume. It also provides a structural support for filter rotation and advanced maintenance functions such as filter self-cleaning and UV sterilization. By setting the filter 31 as a rotatable cylindrical structure and placing the UV sterilization module 60 on one side, the entire outer surface of the rotating filter 31 can be uniformly irradiated 360 degrees without dead angles, ensuring thorough and efficient sterilization and effectively inhibiting bacterial growth.

[0179] In some embodiments, combined with Figure 8 , Figure 42 and Figure 43As shown, the ultraviolet sterilization module 60 includes a lamp holder 62 and an ultraviolet lamp 61. The lamp holder 62 extends along the length of the filter 31, and the extension length is not less than the length of the filter 31. There are multiple ultraviolet lamps 61, which are arranged at intervals along the length of the lamp holder 62, and the irradiation range of the multiple ultraviolet lamps 61 in the height direction of the filter covers the filter.

[0180] In the above embodiment, by setting the length of the lamp holder 62 to be no less than the length of the filter 31, and using multiple ultraviolet lamps 61 arranged at intervals along its length, the irradiation range of the multiple ultraviolet lamps 61 in the height direction of the filter covers the filter, ensuring that the ultraviolet light can cover the entire effective filtration height of the filter 31, avoiding the problem of incomplete sterilization in local areas of the filter due to insufficient irradiation length, ensuring that there are no dead corners in the longitudinal sterilization of the filter, and the interval arrangement of multiple lamp beads can form a continuous and uniform ultraviolet light field on the surface of the filter. Combined with the rotation of the filter, every point of the filter can receive a sufficient amount of ultraviolet radiation dose, thereby greatly improving the reliability and uniformity of sterilization.

[0181] In some embodiments, the lamp holder 62 has a strip-shaped structure and includes a front plate and a rear shell that interlock with each other. The front plate and the rear shell form a mounting cavity for mounting the ultraviolet lamp 61. The front plate has an opening corresponding to the ultraviolet lamp 61 so that the ultraviolet lamp 61 can be exposed and covered onto the filter 31.

[0182] In some embodiments, the ultraviolet sterilization module 60 further includes baffle assemblies disposed on both sides of the plurality of ultraviolet lamps 61. In this embodiment, the irradiation range of the plurality of ultraviolet lamps 61 covers the filter screen in the height direction. Therefore, in the height direction, the ultraviolet light emitted by the ultraviolet lamps 61 can fully cover the filter screen 31. With the filter screen 31 rotating around its central axis, the ultraviolet light can scan the entire surface of the filter screen 31, achieving dynamic and comprehensive sterilization and avoiding static irradiation blind spots. By setting baffle assemblies on both sides of the plurality of ultraviolet lamps 61, the baffle assemblies can prevent ultraviolet light leakage and block the ultraviolet light reflected from the filter screen 31 from irradiating the outside of the air purification device, thereby avoiding harm to the human body. Furthermore, the ultraviolet light is concentrated on the inner side of the baffle assembly, which can improve the sterilization efficiency.

[0183] In some embodiments, such as Figure 42 and Figure 43 As shown, the baffle assembly includes a first baffle 63, which is disposed on both sides of the plurality of ultraviolet lamps 61 and perpendicular to the lamp holder 62. The height of the first baffle 63 is not less than the effective filtration height of the filter screen 31. The first baffle 63 can reflect light, and there is a gap between the first baffle 63 and the surface of the filter screen 31.

[0184] In the above embodiment, the first baffle 63 is disposed on both sides of the plurality of ultraviolet lamps 61 and perpendicular to the lamp holder 62. The height of the first baffle 63 is not less than the effective filtration height of the filter 31. Therefore, the first baffle 63 can prevent ultraviolet light leakage and block the ultraviolet light reflected from the filter from shining on the outside of the air purification device, thereby avoiding harm to the human body. The first baffle 63 can reflect light, so after the ultraviolet light reflected from the filter shines on the first baffle 63, the first baffle 63 can reflect the ultraviolet light back onto the filter 31, thereby ensuring the disinfection effect. The first baffle 63 has a gap with the surface of the filter 31, which can ensure that the first baffle 63 will not interfere with the rotation of the filter and ensure that the filter can rotate smoothly.

[0185] In some embodiments, the baffle assembly further includes a second baffle 64, which is disposed on both sides of the lamp holder 62. The first baffle 63 is located between the two second baffles 64, so the height of the second baffle 64 is not less than the effective filtration height of the filter screen 31. The angle between the second baffle 64 and the plane where the lamp holder 62 is located is an acute angle. The second baffle 64 can reflect light, and there is a gap between the second baffle 64 and the surface of the filter screen.

[0186] In the above embodiment, the second baffle 64 is disposed on both sides of the lamp holder 62, and the first baffle 63 is located between the two second baffles 64. The angle between the second baffle 64 and the plane where the lamp holder 62 is located is an acute angle. The second baffle 64 can further prevent ultraviolet light leakage and block the ultraviolet light reflected from the filter 31 from shining on the outside of the air purification device, thereby avoiding harm to the human body. The second baffle 64 can reflect light, so the ultraviolet light emitted by the ultraviolet lamp 61 passes through the gap between the first baffle 63 and the filter 31 and shines on the filter 31. After being reflected by the filter 31 and shining on the second baffle 64, the second baffle 64 can reflect the ultraviolet light back onto the filter, thereby ensuring the disinfection effect. The gap between the surface of the second baffle 64 and the filter 31 can ensure that the second baffle 64 will not interfere with the rotation of the filter 31, ensuring that the filter can rotate smoothly.

[0187] In some embodiments, the angle between the plane containing the second baffle 64 and the lamp holder 62 is 23°.

[0188] In the above embodiment, the angle between the plane where the second baffle 64 and the lamp holder 62 are located is 23°. The ultraviolet light emitted by the ultraviolet lamp 61 passes through the gap between the first baffle 63 and the filter 31 and shines on the filter 31. After being reflected by the filter 31 and shining on the second baffle 64, the second baffle 64 can reflect the ultraviolet light back onto the filter 31, thereby ensuring the disinfection effect.

[0189] In some embodiments, the first baffle 63 and the second baffle 64 include a substrate and a reflective layer disposed on the surface of the substrate.

[0190] In the above embodiments, by providing a reflective layer on the surface of the substrate, the reflective effect of the first baffle 63 and the second baffle 64 can be ensured.

[0191] In some embodiments, the reflective layer has micron-sized pits.

[0192] In the above embodiments, the reflective layer is provided with micron-level pits, which can realize controlled diffuse reflection of reflected light, so that after secondary reflection by the first baffle 63 and the second baffle 64, a more uniform irradiance distribution is formed on the filter surface.

[0193] In some embodiments, the reflective layer is an aluminum coating.

[0194] In the above embodiments, the reflective layer is an aluminum coating, which can improve the reflectivity, with an ultraviolet light reflectivity of ≥88% at a wavelength of 275nm.

[0195] In some embodiments, the baffle assembly is provided with a first connecting portion, and the lamp holder 62 is provided with a second connecting portion, and the first connecting portion is connected to the second connecting portion.

[0196] In the above embodiment, by providing a first connecting part in the baffle assembly and a second connecting part in the lamp holder 62, the first connecting part and the second connecting part are detachably connected. The cooperation between the first connecting part and the second connecting part can position the installation position of the baffle assembly, so that the baffle assembly is symmetrically distributed on both sides of the multiple ultraviolet lamps 61, ensuring the consistency of the light path.

[0197] In some embodiments, the lamp holder 62 is made of a thermally conductive insulating material.

[0198] In the above embodiment, the lamp holder 62 is made of thermally conductive and insulating material, which can effectively dissipate the heat generated by the ultraviolet lamp 61.

[0199] In some embodiments, the ultraviolet sterilization module is detachably fixed to the filter support structure.

[0200] In the above embodiments, by detachably fixing the ultraviolet sterilization module 60 to the support structure, the accuracy and stability of the sterilization module's position are ensured, and the replacement operation is greatly facilitated when the ultraviolet lamp 61 reaches the end of its life or needs maintenance, thereby reducing after-sales maintenance costs and improving the maintainability of the product.

[0201] In some embodiments, the bottom support assembly 33 and the top support assembly 32 are respectively provided with axial mounting grooves, and the two ends of the lamp holder 62 are respectively inserted into the axial mounting grooves of the bottom support assembly 33 and the top support assembly 32 and fixed by screws.

[0202] In the above embodiments, by placing the lamp holder 62 within the axial mounting grooves on the bottom support component 33 and the top support component 32 respectively, it can be ensured that the lamp holder 62 and the filter are installed coaxially, reducing eccentricity. Furthermore, the two ends of the lamp holder 62 are first inserted into the axial mounting grooves for initial positioning, and then secured with screws, ensuring precise alignment and mechanical strength of the connection, preventing displacement due to vibration, and thus guaranteeing the stability of the sterilization effect of the ultraviolet sterilization module 60.

[0203] Specifically, the axial mounting groove on the bottom support component 33 is open at least on its top surface, and the axial mounting groove on the top support component 32 is open at least on its bottom surface. Preferably, the outer peripheral surfaces of the axial mounting grooves of the bottom support component 33 and the top support component 32 are also open. This design facilitates the installation and fixing of the lamp holder 62 by pushing it into the two axial mounting grooves from the openings on the outer peripheral side of the filter support structure after the filter support structure is assembled. More preferably, at least one axial mounting groove is provided with a positioning rib or a positioning groove, and the lamp holder 62 is provided with a corresponding positioning groove or positioning rib. Through the cooperation of the positioning rib and the positioning groove, the lamp holder 62 can be effectively prevented from tipping over after being pushed into the axial mounting groove, which facilitates subsequent screw driving.

[0204] In some specific embodiments, there are two intermediate support frames 34, which are arranged opposite to each other. The intermediate support frames 34 are frame-shaped, with the upper end of the frame-shaped intermediate support frame 34 connected and fixed to the top support assembly 32, and the lower end of the frame-shaped intermediate support frame 34 connected and fixed to the bottom support assembly 33. The lamp holder 62 is installed between the two intermediate support frames 34.

[0205] In some embodiments, the filter 31 is disposed in the middle of the housing 10 corresponding to the air inlet 100;

[0206] The top and bottom of the filter module 30 are respectively formed with an upper purification outlet 3230 and a lower purification outlet 3311. The upper fan assembly 21 is installed above the filter support structure and is connected to the upper purification outlet 3230. The lower fan assembly 22 is installed below the filter support structure and is connected to the lower purification outlet 3311. After the external air enters the housing 10 from the air inlet 100, it is filtered by the filter module 30 and flows to the upper fan assembly 21 and the lower fan assembly 22 from the upper purification outlet 3230 and the lower purification outlet 3311, respectively.

[0207] In the above embodiment, the air to be purified enters from the central air inlet 100, and after being filtered by the cylindrical filter 31, it naturally splits into two directions, upward and downward, and flows from the upper and lower purification outlets to the corresponding fan components. The airflow path is short and smooth, reducing wind resistance and turbulence, thereby improving the overall purification efficiency.

[0208] In some embodiments, filter 31 is composed of at least a HEPA filter and an activated carbon filter.

[0209] In the above embodiments, the cylindrical filter 31 is designed to fit the air inlet 100 circumferentially surrounding the outer casing 10, resulting in a larger filtration area and the ability to handle a larger air volume within the same volume. It also provides a structural support for filter rotation and advanced maintenance functions such as filter self-cleaning and UV sterilization. Furthermore, the filter 31 employs a composite design of HEPA and activated carbon filters, which not only efficiently intercepts particulate matter but also adsorbs gaseous pollutants, achieving simultaneous and efficient removal of both major air pollutants.

[0210] Specifically, the HEPA filter is located on the inner circumference of the activated carbon filter, and the filter 31 is detachably installed in the housing 10. By integrating the HEPA high-efficiency particulate air filter and the composite activated carbon filter into one unit, an independently replaceable cylindrical unit is formed and detachably installed in the housing 10, effectively solving the resource waste problem of traditional integrated filters that need to be replaced as a whole due to partial failure.

[0211] In some embodiments, the upper air outlet 101 is disposed on the top surface of the air purifier; the lower air outlet 102 is disposed around the bottom peripheral wall of the air purifier.

[0212] In the above embodiments, the air inlet 100, through its surrounding design, increases the effective air intake area, allowing more air to be purified to quickly enter the device. This provides a structural basis for achieving a large air volume and a high clean air output ratio, thereby improving the initial purification efficiency of the entire unit. Furthermore, by placing the upper air outlet 101 on the top surface of the outer casing 10, it facilitates the upward diffusion and natural downward flow of clean air, forming a gentle vertical airflow. The bottom circumferential air outlet design allows air to be delivered horizontally to the far end of the room. This combined upper and lower air outlet method creates a uniform and gentle airflow, completely avoiding discomfort caused by direct airflow onto the human body. It is particularly suitable for bedrooms, studies, and other scenarios where quietness and comfort are paramount.

[0213] In one specific example, the top of the housing 10 is open and fitted with an air outlet grille 12 to form an upper air outlet 101. An air inlet 100 and a lower air outlet 102 surround at least two sides of the housing 10.

[0214] In some embodiments, the air inlets 100 are distributed on the back and two sides of the housing 10; the lower air outlets 102 are distributed on the back and two sides of the housing 10.

[0215] In the above embodiments, by setting the air inlet 100 and the lower air outlet 102 on the back and two sides of the housing 10 instead of the front, the front panel does not need to have a functional air inlet 100 or air outlet, thus maintaining the aesthetic and clean appearance of the product. In order to facilitate the maintenance and replacement of the filter, deodorization module 50, etc. inside the air purifier, a large disassembly port needs to be opened on the housing 10. By setting the disassembly port on the back of the housing 10 and installing the air inlet grille 11 on the disassembly port, the structure can be hidden, making it convenient to disassemble and maintain the internal components of the housing 10. It can also serve as an air inlet 100 or air outlet for air intake and exhaust, while maintaining a complete and simple appearance, making it easier to integrate into home decoration styles and enhancing the aesthetic value of the product.

[0216] In some embodiments, the air purifier further includes an odor removal module 50, wherein the downdraft assembly has a downdraft duct, and the odor removal module is integrated and installed at the outlet of the downdraft duct. By integrating the odor removal module at the outlet of the downdraft duct, the space at the end of the downdraft duct can be fully utilized, avoiding the need for separate additional installation space, making the overall structure more compact and space-efficient. Furthermore, it enables modular integration design, allowing the odor removal module and the downdraft duct to form an integrated structure, reducing assembly steps, making installation convenient and efficient, improving production efficiency, and reducing the error rate during installation.

[0217] In some embodiments, the deodorization module 50 includes a plasma generator 51, which can generate plasma by discharge to decompose odors in the air.

[0218] In the above embodiments, the plasma generator 51 installed at the upper air outlet 101 or the lower air outlet 102 can generate high-density plasma, which can catalytically degrade harmful gases through discharge, thereby deeply decomposing gaseous pollutants such as residual odors, formaldehyde, and TVOCs in the clean air to be discharged, and completely eliminating odors. This makes up for the shortcomings of traditional filters, which are mainly for particulate matter and have limited removal efficiency for gaseous pollutants, and expands the purification capabilities of air purifiers.

[0219] In a specific example, the deodorization module 50 is located at the lower air outlet 102, while the upper air outlet 101 is not equipped with the deodorization module 50. This design ensures that the air coming out of the upper air outlet 101 does not undergo additional purification and deodorization, thus maximizing the purification performance and working efficiency of the air purifier in deodorization mode.

[0220] In some embodiments, the plasma generator 51 is installed on the outer periphery of the first support 222 and corresponds to the lower air outlet 102. The plasma generator 51 and the first support 222 enclose each other to form a lower air duct. The lower air duct connects the air inlet 100 and the lower air outlet 102, and the first fan 221 is located in the lower air duct.

[0221] In the above embodiments, by integrating the deodorization module 50 with the lower fan assembly 22, the first bracket 222 not only fixes the fan but also serves as the duct wall and mounting base for the deodorization module 50, achieving modular and integrated design of functional components. This greatly saves internal space, making the overall layout more reasonable and compact, and increasing space utilization. Furthermore, by directly placing the plasma generator 51 inside the lower duct and facing the lower air outlet 102, it ensures that all air blown from the bottom passes through the plasma area, thereby guaranteeing the effectiveness and consistency of the deodorization process.

[0222] Specifically, the first fan 221 includes a first motor 2211 and a first fan blade 2212. The first motor 2211 and the first fan blade 2212 are connected. The first motor 2211 can drive the first fan blade 2212 to rotate, so as to drive the air entering from the air inlet 100 to flow down the air outlet 102 along the first air duct. The first motor 2211 is detachably installed and fixed in the first bracket 222, and the first fan blade 2212 is installed on the output shaft above the first motor 2211. The plasma generator 51 has a discharge gap for airflow. When the plasma generator 51 is installed on the first bracket 222, the plasma generator 51 is located on the airflow path from the air inlet 100 to the lower air outlet 102, and the plasma generator 51 has a discharge gap for airflow and discharge purification.

[0223] In some embodiments, the lower air outlet 102 is distributed on at least two sides of the housing 10; at least two sets of plasma generating devices 51 are provided, and the at least two sets of plasma generating devices 51 are arranged on at least two sides of the first bracket 222 corresponding to the lower air outlet 102; the at least two sets of plasma generating devices 51 and the first bracket 222 enclose a lower air duct that is closed at the bottom, draws air at the top, and discharges air from at least two sides.

[0224] In the above embodiment, the lower air outlet 102 adopts a design with air outlets on at least two sides, which makes the bottom air supply direction wider, can push clean air to fill the entire bottom space of the room more quickly, reduce purification dead corners, improve air replacement efficiency, and achieve multi-directional and uniform bottom air outlet. Furthermore, plasma generators 51 are configured in multiple air outlet directions, ensuring effective odor decomposition regardless of the direction of airflow, thus achieving full coverage of odor removal in the bottom air outlet area and significantly enhancing the product's ability to cope with complex odor environments. In addition, the "closed bottom, suction top, multi-directional air outlet" duct structure formed by the plasma generator 51 and the first support 222 is highly efficient and reasonable, conforming to the working characteristics of a centrifugal fan, effectively guiding airflow, gathering purified air from the middle, and uniformly pressing it out from multiple directions.

[0225] In one specific example, the deodorization module 50 is plugged into the first bracket 222 for easy disassembly and maintenance.

[0226] In a specific example, the lower air outlet 102 is provided on three sides of the outer casing 10, and three flow openings 2220 are correspondingly provided on the first bracket 222. The plasma generator 51 has three sets, and the three sets of plasma generators 51 are correspondingly installed at the three flow openings 2220 to catalytically degrade harmful gases, odors, etc. in the air flowing through the flow openings 2220 through discharge.

[0227] In some embodiments, the first bracket 222 is a frame structure, and the first bracket 222 is provided with an overflow opening 2220 on one side corresponding to the lower air outlet 102; a slot 2221 is formed on the first bracket 222, and the plasma generator 51 is inserted into the slot 2221 and corresponds to the overflow opening 2220.

[0228] In the above embodiment, the frame-type first bracket 222 adopts a slot-type design, which facilitates the insertion and removal of the plasma generator 51 as an independent module on the first bracket 222. This not only ensures a stable and reliable connection but also greatly simplifies the production and assembly process, making it easier for users or maintenance personnel to replace or maintain the plasma generator 51, reducing after-sales service costs, and facilitating production and maintenance. Furthermore, the design of the slot 2221 structure enables accurate positioning, ensuring the precision and consistency of the plasma generator 51's installation position, so that its air outlet surface is precisely aligned with the flow opening 2220 on the bracket, guaranteeing smooth airflow.

[0229] In some embodiments, the plasma generating device 51 includes a mounting frame 511 and a plurality of electrode structures 512, the plurality of electrode structures 512 being arranged at intervals on the mounting frame 511 along the length direction of the mounting frame 511; there is a discharge gap between two adjacent electrode structures 512 and between the electrode structure 512 and the mounting frame 511 for gas flow.

[0230] In the above embodiment, a large plasma generation area can be formed by multiple electrode structures 512 spaced apart along the length of the mounting frame 511, increasing the plasma reaction area and improving processing efficiency. Furthermore, the multiple electrode structures 512 allow airflow to pass through these dense discharge gaps as it flows from the air inlet 100 to the air outlet 102, increasing the probability and time for pollutants to collide with high-energy plasma, resulting in more complete and efficient odor decomposition. In addition, the design of the discharge gaps allows airflow to pass through normally, avoiding excessive resistance to the air duct caused by overly dense structures, which could affect the overall airflow.

[0231] In some embodiments, the deodorization module 50 further includes a metal mesh cover 52, which is disposed on the side of the plasma generator 51 near the lower air outlet 102. The metal mesh cover 52 is grounded, and the metal mesh cover 52 is provided to prevent excessive plasma generated by the plasma generator 51 from overflowing.

[0232] In some embodiments, the deodorization module 50 further includes an ozone reduction mesh 53. A metal mesh cover 52 is disposed between the plasma generator 51 and the ozone reduction mesh 53. The ozone reduction mesh 53 can effectively prevent excessive ozone leakage generated by the discharge of the plasma generator 51.

[0233] Furthermore, along the airflow direction, the plasma generator 51, the metal mesh cover 52, and the ozone reduction mesh 53 are arranged sequentially. The first support 222 is provided with a sliding groove for installing the metal mesh cover 52 and the ozone reduction mesh 53. The metal mesh cover 52 and the ozone reduction mesh 53 are slidably installed in the sliding groove from the side of the first support 222. This design facilitates the disassembly and maintenance of the metal mesh cover 52 and the ozone reduction mesh 53.

[0234] In some alternative embodiments, two sets of partition ribs can be provided in the slot 2221 of the first bracket 222 to divide the space into three slots, which are respectively used to install the plasma generator 51, the metal mesh cover 52 and the ozone reduction mesh 53.

[0235] In some embodiments, the upper fan assembly 21 includes a second fan 211, a second bracket 213 for mounting the second fan 211, and an upper air duct 212. The inlet end of the upper air duct 212 is connected to the upper purification outlet 3230 of the filter module 30, and the outlet end is connected to the upper air outlet 101. The second fan 211 is disposed inside the upper air duct 212. The second bracket 213 is installed on the side of the upper air duct 212 away from the filter module 30. The upper air duct 212 is inserted and positioned above the filter support structure and fixed with screws.

[0236] In the above embodiments, the upper fan assembly 21, by adopting the design of the second fan 211, the second bracket 213, and the upper air duct 212, forms two completely independent drive systems with the lower fan assembly 22. They can be controlled and adjusted separately, thereby realizing multiple working modes, such as sleep mode using only the upper air outlet, and strong mode using both upper and lower air outlets simultaneously, which greatly increases the product's functional diversity and scenario adaptability.

[0237] Specifically, the second fan 211 includes a second motor 2111 and a second fan blade 2112. The second motor 2111 is connected to the second fan blade 2112 and can drive the second fan blade 2112 to rotate, so that the airflow flows from the air inlet 100 to the air outlet 101.

[0238] The filtering module 30 of this embodiment will be described below with reference to the accompanying drawings.

[0239] In some embodiments, the top support assembly 32 includes a rotatably configured upper mating structure; the bottom support assembly 33 includes a lifting module 332 and a tray 333 rotatably configured above the lifting module 332, the filter screen 31 is formed in a cylindrical shape, and the filter screen 31 is disposed between the tray 333 and the upper mating structure.

[0240] The filter module 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 screen 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 screen 31 is sandwiched between the upper mating structure and the tray 333.

[0241] This application enables the filter module 30 to dynamically switch between a first state and a second state through the active deformation of the mechanical structure, adapting to the installation and maintenance conditions and stable working conditions of the filter screen 31 respectively.

[0242] The first state is the installation or maintenance state of the filter module 30, and the second state is the working and locked state of the filter module 30. In the first state, by controlling the tray 333 to be at a lower first height, an axial gap sufficient for the filter screen 31 to move freely horizontally is created between the tray 333 and the upper mating structure above, creating physical conditions for the unobstructed placement and removal of the filter screen 31.

[0243] 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 filter 31 and enhances the user experience.

[0244] The switching between states is accomplished by the lifting module 332 as the power source and actuator. When it is necessary to enter the working state, the lifting module 332 outputs power to precisely lift the tray 333 from the first height to a higher second height. This lifting action actively eliminates the aforementioned axial clearance and causes the filter screen 31 to be synchronously limited by the upper mating structure and the lower tray 333, thus being clamped between the two.

[0245] In the second state, the filter 31 is axially limited, which effectively prevents the filter 31 from axial movement, radial eccentricity or circumferential slippage that may occur during high-speed rotation. This makes the filter 31 rotate smoothly and at a uniform speed, significantly reducing operating noise and overall machine vibration caused by vibration and eccentricity. At the same time, it ensures the uniformity of airflow when passing through the filter and improves the consistency of purification effect.

[0246] In summary, the filter module 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 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 31 between the upper mating structure and the tray 333, creating a stable clamping position. This prevents displacement and eccentricity during filter rotation, ensuring smooth operation. With the filter 31 clamped, the rotational drive force is transmitted more stably, avoiding 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.

[0247] Since the filter 31 can rise to engage with the upper support structure of the top support component 32, the drive component 322 can be located on the top support component 32 on the upper side of the filter module 30 to achieve a better driving effect that is not affected by the gravity of the filter 31. Alternatively, the drive component 322 can also be located on the bottom support component 33 on the lower side of the filter module 30.

[0248] In one embodiment, such as Figures 26-38 As shown, the bottom support component 33 includes:

[0249] The bottom frame 331 is fixedly installed inside the outer shell 10. A lower purification outlet 3311 is formed on the bottom frame 331. A tray 333 is arranged around the lower purification outlet 3311. A lifting module 332 is arranged between the tray 333 and the bottom frame 331.

[0250] Thus, based on the bottom frame 331, a clear functional division is achieved inside the outer shell 10, providing a rigid foundation for the lifting process.

[0251] The bottom frame 331 is fixedly installed inside the outer casing 10. Its primary function is to serve as the installation reference and load-bearing foundation for the entire bottom support assembly 33 and even the filter module 30. It provides a precise and immovable reference plane and installation interface for all subsequent moving parts, such as the tray 333 and the lifting module 332, ensuring the overall structural rigidity and positional accuracy of the assembly. At the same time, the lower purification outlet 3311 is directly formed on the bottom frame 331, which means that it integrates the load-bearing function and the air duct function, defining the starting point of the path for clean air to be discharged from the filter module 30.

[0252] The tray 333 is designed to surround the lower purification outlet 3311, so that the inner ring area of ​​the tray 333 is empty and corresponds to the lower purification outlet 3311. This allows the clean air flowing out from inside the filter 31 to be discharged directly through the lower purification outlet 3311 without any obstruction. The tray 333 only provides annular support for the bottom of the filter in the outer ring area. This achieves physical separation of the "support surface" and the "airflow channel" in the radial space, so that they do not interfere with each other.

[0253] The lifting module 332 is positioned between the tray 333 and the bottom frame 331. By utilizing the interlayer area formed between the lower surface of the tray 333 and the upper surface of the bottom frame 331, the lifting module 332 is completely hidden and protected under the tray 333, which forms a support platform. This achieves isolation between the lifting module 332 and the filter screen 31, ensuring the stability of the support effect.

[0254] The bottom frame 331 provides a rigid mounting reference for the tray 333 and the lifting module 332, ensuring that the driving force of the lifting module 332 is stably transmitted to the tray 333, avoiding tilting or jamming during lifting, and improving the coaxiality of the filter 31 clamping. The tray 333 is positioned around the lower purification outlet 3311, without obstructing the exhaust channel of the filtered clean airflow, ensuring the ventilation efficiency of the lower air outlet 102, and at the same time ensuring that the bottom of the filter 31 is evenly stressed, preventing excessive local pressure from 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.

[0255] In other embodiments, the tray 333 may be directly integrated into the lifting module 332, which is not limited here.

[0256] In one embodiment, the lifting module 332 can drive the tray 333 to rise or fall, or the tray 333 can be driven to rise or fall by other driving structures 32212.

[0257] like Figures 26-39 As shown, the lifting module 332 includes a rotary switch 3321, which is movably disposed above the bottom frame 331 between an open position and a locked position. In a first state, the rotary switch 3321 is in the open position, and in a second state, the rotary switch 3321 is in the locked position.

[0258] In other words, the lifting module 332 of this application uses a mechanical rotary switch 3321 to achieve the switching drive. Since the tray 333 is formed into a ring structure surrounding the lower purification outlet 3311, the lifting module 332 is similar in shape to the tray 333 and is also a ring-like structure. The rotation process of the rotary switch 3321 does not change the projection coverage position and area of ​​the lifting module 332 on the horizontal plane, which is more suitable for achieving the lifting drive of the lifting module 332 by rotating the rotary switch 3321.

[0259] The rotary switch 3321 is designed to move only between two defined positions: the open position and the locked position. These two positions correspond one-to-one with the first and second states of the filter module 30, forming an intuitive and reliable mapping relationship between position and state. By limiting the end point of the switch's travel, the mechanical structure ensures that the system can only stably exist in these two preset operating modes, avoiding limit failure caused by inaccurate adjustment.

[0260] The circumferential rotation of the switch itself, through a specific structure, can be converted into the axial lifting motion required to drive the tray 333. This conversion of motion allows the user to indirectly and effectively control the lifting process of the tray 333 through a simple rotational action.

[0261] 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 module 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 product lifespan compared to electronic switches.

[0262] In other embodiments, the lifting module 332 may also use an electronic switch to achieve lifting switching, which is not limited here.

[0263] In one embodiment, such as Figure 26 and Figure 27 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.

[0264] A first driving ramp 33131 is provided on the bottom frame 331, and the rotary switch 3321 slides up and down above the first driving ramp 33131 while rotating between the open and locked positions. The ramp mechanism directly and efficiently converts the rotational motion of the rotary switch 3321 into its own axial lifting motion.

[0265] According to the principles of inclined plane mechanics, when an object slides along an inclined plane, its displacement along the inclined plane can be decomposed into vertical and horizontal components. The first driving inclined plane 33131 is fixed to the bottom frame 331, and its inclination direction has a height change in the circumferential direction, that is, along the rotation path of the rotary switch 3321. When the rotary switch 3321 rotates relative to the bottom frame 331, the part of the switch in contact with the inclined plane will be forced to move along the contour trajectory of the inclined plane. Due to the radial and circumferential constraints of the inclined plane, this relative sliding in the circumferential direction will inevitably cause the rotary switch 3321 to generate a forced upward or downward displacement in the vertical direction, thereby realizing the linkage between "rotation" and "lifting".

[0266] By using a fixed inclined plane in conjunction with the rotary switch 3321, the conversion from rotation to lifting is achieved without the need for complex transmission mechanisms such as additional gears and racks, lead screws and nuts, connecting rods and hinges, or independent electric push rods. This makes the lifting module 332 extremely simple in structure, with few parts and easy assembly.

[0267] Inclined plane transmission inherently features smooth motion and minimal impact. The process of rotating switch 3321 sliding up or down along the inclined plane is smooth and controllable.

[0268] 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.

[0269] 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.

[0270] By utilizing the guiding effect of the first driving inclined surface 33131, the circumferential rotational motion of the rotary switch 3321 is converted into axial lifting motion, eliminating the need for additional lifting drive components, simplifying the structure of the lifting module 332, and reducing production and assembly costs. The inclined surface drive method ensures a smooth and stable lifting process, avoiding any jerking sensation. Simultaneously, the driving force is evenly distributed, ensuring the synchronous lifting of the rotary switch 3321 and preventing uneven filter clamping due to tray 333 tilting. The inclined surface structure has a self-locking characteristic; after the rotary switch 3321 is switched to the locked position, it maintains a stable height under the support of the inclined surface, preventing the filter from loosening due to vibration or external force, and improving the stability of the filter's working state.

[0271] In one embodiment, such as Figure 26 and Figure 27 As shown, a first protrusion 3313 is formed on the bottom frame 331, and a first driving inclined surface 33131 is formed on the first protrusion 3313, which is inclined vertically in the circumferential direction. A first groove is formed on the lower surface of the rotary switch 3321. In the first state, the first protrusion 3313 is accommodated in the first groove.

[0272] A first protrusion 3313 is formed on the bottom frame 331, and a first driving inclined surface 33131 with a height change 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.

[0273] When the filter module 30 is in the first state, i.e., the rotary switch 3321 is in the open position, the first protrusion 3313 is accommodated in the first groove. Through the engagement of the first protrusion 3313 with the sidewall of the first groove, the rotary switch 3321 is precisely positioned radially, preventing it from shifting when not in operation. The inner wall of the first groove contacts the top surface of the first protrusion 3313, determining the precise axial height of the rotary switch 3321 in this state, thereby indirectly ensuring that the tray 333 is at the preset "first height". This embedded engagement constitutes a stable mechanical lock in the first state.

[0274] The number of first protrusions 3313 and first grooves can be multiple, evenly distributed circumferentially to enhance positioning stability and force balance. The specific contour of the first driving inclined surface 33131 can be a straight inclined surface or a composite curved surface, etc., to optimize the relationship between force and stroke. Elastic material can be provided on the top of the protrusion or the bottom of the groove.

[0275] The engagement of the first protrusion 3313 and the first groove ensures precise positioning of the rotary switch 3321 in the open position, preventing switch displacement due to non-human operation and ensuring that the filter 31 can be freely placed and removed in the first state. The circumferentially inclined first drive ramp 33131 fits against the side wall of the first groove, making the guiding effect of the ramp more precise and the motion conversion efficiency higher when rotating the rotary switch 3321, further improving the smoothness of the lifting action. The embedded engagement structure of the protrusion and groove is compact, occupies little space, and at the same time enhances the connection strength between the rotary switch 3321 and the bottom frame 331, improving the overall rigidity of the lifting module 332.

[0276] In one embodiment, such as Figures 26-38 As shown, the lifting module 332 includes: a slider structure 3322 that is vertically movable between the tray 333 and the rotary switch 3321. The upper surface of the rotary switch 3321 is provided with a second driving inclined surface 332121. While the rotary switch 3321 rotates between the open position and the locked position, the slider structure 3322 slides up and down above the second driving inclined surface 332121.

[0277] A slider structure 3322 is introduced in the lifting module 332 between the tray 333 and the rotary switch 3321. The slider structure 3322 can only move vertically up and down, ensuring that the rotation of the rotary switch 3321 and the tray 333 can be carried out independently, avoiding unnecessary synchronous rotation of the two.

[0278] As an independent intermediate component, the slider structure 3322 indirectly transmits the driving force of the rotary switch 3321 to the tray 333, achieving functional decoupling. Driven by the rotary switch 3321, the slider transmits the driving force and guides it in the vertical direction, avoiding direct and complex coupling between the rotary switch 3321 and the tray 333, allowing each part to be optimized independently. Simultaneously, by providing a sufficiently large contact surface between the slider structure 3322 and the tray 333, the slider structure 3322 can transmit the driving force of the rotary switch 3321 to the tray 333 more evenly and stably, preventing tilting caused by excessive force at a single point or uneven force on the tray 333.

[0279] The slider structure 3322 can be a complete ring or multiple independent sliders distributed circumferentially.

[0280] A second driving inclined surface 332121 is provided on the rotary switch 3321, and while the rotary switch 3321 rotates between the open position and the locked position, the slider structure 3322 slides up and down above the second driving inclined surface 332121. This inclined surface mechanism directly and efficiently converts the rotational motion of the rotary switch 3321 into the axial lifting motion of the slider structure 3322.

[0281] According to the principles of inclined plane mechanics, when an object slides along an inclined plane, its displacement along the inclined plane can be decomposed into vertical and horizontal components. The slider structure 3322 has only one degree of freedom in vertical movement, while the second driving inclined plane 332121 has a height variation along its circumferential direction, i.e., along the rotation path of the rotary switch 3321. When the rotary switch 3321 rotates relative to the slider structure 3322, the portion of the slider structure 3322 in contact with the second driving inclined plane 332121 is forced to move along the contour trajectory of the inclined plane. Due to the radial and circumferential constraints of the inclined plane, this relative sliding in the circumferential direction inevitably causes the slider structure 3322 to produce a forced upward or downward displacement in the vertical direction, thus achieving the linkage between "rotation" and "lifting / lowering".

[0282] 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.

[0283] Inclined plane transmission inherently features smooth motion and minimal impact. The slider structure 3322 slides smoothly and controllably upwards or downwards along the inclined plane.

[0284] 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.

[0285] In other embodiments, the inclined surface may also be provided on the lower surface of the slider structure 3322, while the corresponding mating structure is provided on the rotary switch 3321 to achieve a reverse mating relationship.

[0286] By utilizing the guiding effect of the second driving inclined surface 332121, the circumferential rotational motion of the rotary switch 3321 is converted into the axial lifting motion of the slider structure 3322. This eliminates the need for additional lifting drive components, simplifying the structure of the lifting module 332 and reducing production and assembly costs. The inclined surface drive ensures a smooth and stable lifting process, avoiding any jerking sensation. Simultaneously, the driving force is evenly distributed, ensuring the synchronous lifting of the rotary switch 3321 and preventing uneven filter clamping due to tray 333 tilting. The inclined surface structure has a self-locking characteristic; after the rotary switch 3321 is switched to the locked position, the slider structure 3322 maintains a stable height under the support of the inclined surface, preventing the filter from loosening due to vibration or external forces and improving the stability of the filter's working state. The slider structure 3322 receives the driving force of the rotary switch 3321 and transmits it to the tray 333, making the force on the tray 333 more even. The lifting assembly, through the slider structure 3322 (which has no degrees of freedom in the circumferential direction) cooperating with the tray 333, prevents the tray 333 from driving the lifting assembly to rotate, ensuring structural stability. Furthermore, the contact area between the lifting module 332 and the tray 333 is increased by the slider structure 3322, which avoids the deformation of the tray 333 due to single-point force, ensures that the filter screen 31 is clamped horizontally, and improves rotational stability.

[0287] In one embodiment, such as Figure 27 and Figure 39 As shown, a second protrusion 33212 is formed on the rotary switch 3321, and a second driving inclined surface 332121 is formed on the second protrusion 33212, which is inclined vertically in the circumferential direction. A second groove 33221 is formed on the lower surface of the slider structure 3322. In the first state, the second protrusion 33212 is accommodated in the second groove 33221.

[0288] A second protrusion 33212 is formed on the rotary switch 3321, and a second driving inclined surface 332121 with a height variation in the circumferential direction is constructed on the second protrusion 33212; correspondingly, a second groove 33221 is formed on the lower surface of the slider structure 3322, thus constructing an embedded convex-concave mating mechanism that integrates precise positioning, motion guidance and stroke limitation.

[0289] When the filter module 30 is in the first state, i.e., the rotary switch 3321 is in the open position, the second protrusion 33212 is accommodated within the second groove 33221. Through the engagement of the second protrusion 33212 with the sidewall of the second groove 33221, precise radial positioning of the rotary switch 3321 and the slider structure 3322 is achieved, preventing displacement during non-operation. The inner wall of the second groove 33221 contacts the top surface of the second protrusion 33212, determining the precise axial height of the slider structure 3322 in this state, thereby indirectly ensuring that the tray 333 is at the preset "first height." This embedded engagement constitutes a stable mechanical lock in the first state.

[0290] The number of second protrusions 33212 and second grooves 33221 can be multiple, evenly distributed circumferentially to enhance positioning stability and force balance. The specific contour of the second driving inclined surface 332121 can be a straight inclined surface or a composite curved surface, etc., to optimize the relationship between force and stroke. Elastic material can be provided on the top of the protrusion or the bottom of the groove.

[0291] The engagement of the second protrusion 33212 and the second groove 33221 enables precise positioning of the slider structure 3322 in its first state, ensuring that the tray 333 is at a preset low height and providing ample space for the horizontal movement of the filter screen 31. The circumferentially inclined second drive ramp 332121 fits tightly against the sidewall of the second groove 33221. When the rotary switch 3321 rotates, the driving force is evenly transmitted to the slider structure 3322 through the ramp, preventing the slider structure 3322 from jamming or shifting, and improving the synchronization of the lifting action. The engagement structure of the protrusion and groove has a limiting function, preventing the slider structure 3322 from disengaging from the rotary switch 3321, improving the structural reliability of the lifting module 332, and extending its service life. The embedded engagement structure of the protrusion and groove is compact, occupying little space, while also enhancing the connection strength between the rotary switch 3321 and the bottom frame 331, improving the overall rigidity of the lifting module 332.

[0292] In one embodiment, such as Figure 26 , Figure 27 and Figure 39 As shown, a first protrusion 3313 is formed on the bottom frame 331, and a first driving inclined surface 33131 is formed on the first protrusion 3313, which is inclined vertically in the circumferential direction. The inner wall of the structure corresponding to the second protrusion 33212 is empty, and a first groove is formed on the lower surface of the rotary switch 3321. In the first state, the first protrusion 3313 is accommodated in the first groove.

[0293] Within a limited thickness space, a first-level drive interface with the rotary switch 3321 and the bottom frame 331 and a second-level drive interface with the slider structure 3322 are integrated.

[0294] The rotary switch 3321, acting as an intermediate transmission component, has a first groove on its lower surface that mates with the first protrusion 3313 of the bottom frame 331, and a second protrusion 33212 on its upper surface for driving the slider structure 3322. To achieve a minimum axial thickness, the internal area of ​​the rotary switch 3321 corresponding to the second protrusion 33212 is designed to have an "empty inner wall." This empty area provides vertical space for the first protrusion 3313 from the bottom frame 331 to accommodate and move. This allows the first protrusion 3313 of the bottom frame 331 to "pass through" the hollow area of ​​the rotary switch 3321, 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.

[0295] 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.

[0296] In the second-stage conversion phase, the second protrusion 33212 on the upper surface of the rotary switch 3321 slides within the second groove 33221 of the slider. This slope forces the slider to produce an axial displacement relative to the rotary switch 3321, moving away from or closer to it.

[0297] Ultimately, in the second state, the total lifting stroke of the slider, tray 333, and filter 31 is the vector sum of these two axial displacements. This design allows for a greater total lift than a single-stage drive, or the required lift to be achieved with less operating force, while maintaining the same rotation angle and thickness of the rotary switch 3321.

[0298] By adding a first driving inclined surface 33131 to the existing second driving inclined surface 332121, a two-stage inclined surface drive is formed. This allows for a further increase in the lifting stroke of the rotary switch 3321 during rotation without increasing its thickness, thus adapting to filters 31 of different thicknesses and improving product compatibility. The two-stage inclined surface drive design reduces the operating resistance of the rotary switch 3321, making it easier for users to rotate the switch.

[0299] 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 inclined drive structures 32212, 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 inclined surfaces drive in the same direction. When the rotary switch 3321 rotates, the two inclined surfaces apply force synchronously or separately, improving lifting efficiency while ensuring the stability and coaxiality of the tray 333 during lifting. The empty inner wall design reduces the material usage of the rotary switch 3321, achieving lightweight design while maintaining structural strength, thus reducing the overall weight and production cost.

[0300] In one embodiment, such as Figures 26-38 As shown, the bottom frame 331 surrounds the lower purification outlet 3311 and has a second mounting part 3312 formed as a cylinder. The lifting module 332 is sleeved on the outside of the second mounting part 3312. The second mounting part 3312 has a guide rail structure 33121 extending vertically. The slider structure 3322 cooperates with the guide rail and moves along the extension direction of the guide rail.

[0301] The bottom frame 331 surrounds the lower purification outlet 3311 to form the second mounting part 3312 of the cylinder, meaning that the second mounting part 3312 is primarily a physical extension and component of the lower purification duct. The design reinforces it as a "central cylinder" with sufficient structural rigidity. This cylinder serves multiple roles: it is the channel for clean airflow discharge, the central positioning reference for the entire lifting module 332, the mounting foundation and load-bearing core for the lifting module 332 and tray 333, and guides the movement of various structural components of the lifting module 332 and tray 333.

[0302] The central cylinder provides a natural, immovable center for the lifting module 332 that is fitted on the outside, which forcibly ensures that all movements of the entire lifting module 332 are around this central axis, fundamentally guaranteeing that the lifting of the tray 333 has a higher degree of coaxiality.

[0303] A vertically extending guide rail structure 33121 is formed on the outer wall of the second mounting portion 3312 of the cylinder. A corresponding portion of the slider structure 3322 mates with this guide rail. This design strictly limits the circumferential freedom of the slider structure 3322, allowing it to move only vertically along the guide rail direction, completely eliminating the possibility of circumferential rotation. This ensures that regardless of how the rotary switch 3321 is rotated, only a pure axial force is transmitted to the slider, and the slider drives the tray 333 to perform only a pure vertical lifting and lowering, avoiding any tilting or twisting.

[0304] The cylindrical second mounting part 3312 provides a central positioning reference for the lifting module 332, ensuring that the lifting module 332 is coaxially arranged around the lower purification outlet 3311, avoiding radial offset during lifting and improving the clamping accuracy of the filter screen 31. The vertical guide rail structure 33121 guides the lifting movement of the slider structure 3322, restricting the circumferential rotation of the slider structure 3322 and ensuring that the slider structure 3322 moves only along the axial direction, further improving the stability and levelness of the tray 333 lifting and lowering. This ensures that during the rotation of the rotary switch 3321, the slider structure 3322 moves vertically under the drive of the second driving inclined surface 332121.

[0305] The cooperation between the guide rail and the slider reduces the frictional resistance during the lifting process, making the operation of the rotary switch 3321 easier, while reducing component wear and extending the service life of the lifting module 332.

[0306] In one embodiment, such as Figures 27-29 As shown, the lifting module 332 also includes: a lever 3323, which slides between the unlocked and locked positions along a horizontal first direction; the rotary switch 3321 is provided with a pin 33231 extending vertically; the lever 3323 is provided with a long sliding hole 33213; and the pin 33231 is inserted into the long sliding hole 33213 and slides in cooperation with the long sliding hole 33213.

[0307] Thus, the power input point of the lifting module 332 is transferred from the rotary switch 3321 itself to a separate lever 3323. The horizontal linear sliding operation applied by the user to the lever 3323 is more intuitive and easier to apply force when operating from the side of the device. When the lever 3323 is moved horizontally, the pin 33231 pushes or pulls the wall of the long sliding hole 33213. Since the long sliding hole 33213 is located on the rotary switch 3321, this force will generate a torque that drives the rotary switch 3321 to rotate around its axis.

[0308] The cooperation between lever 3323 and pin 33231 transforms the user's horizontal sliding operation of lever 3323 into the circumferential rotation of switch 3321. This operation method is more ergonomic, allowing users to easily lock and unlock the filter by pushing and pulling lever 3323, improving ease of use. The sliding engagement between the elongated sliding hole 33213 and pin 33231 accommodates both the rotational and axial lifting movements of switch 3321, ensuring that the operation of lever 3323 and the lifting action do not interfere with each other, improving the structural motion coordination. The lever 3323 allows for flexible arrangement of the switch operation position, facilitating the extension of the operating end to the outside of the purifier housing 10 for convenient user operation.

[0309] In one embodiment, such as Figures 27-29As shown, the elongated sliding hole 33213 extends radially along the rotary switch 3321. This radial extension ensures that the sliding direction of the pin 33231 within the hole aligns with the rotational tangent direction of the rotary switch 3321, resulting in higher force transmission efficiency and requiring less effort from the user when pushing the lever 3323, thus reducing operational resistance. The radially elongated sliding hole 33213 adapts to variations in the rotation radius of the rotary switch 3321, ensuring that the pin 33231 always slides within the hole, preventing jamming and improving the structural reliability. The radial layout allows for precise matching of the sliding stroke of the lever 3323 with the rotation angle of the rotary switch 3321, enabling the user to visually determine the filter's locking status by observing the sliding distance of the lever 3323.

[0310] 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.

[0311] In one embodiment, such as Figure 40 and Figure 41 As shown, the pin 33231 is vertically movably slidably engaged with the elongated sliding hole 33213. This bidirectional sliding engagement between the pin 33231 and the elongated sliding hole 33213 accommodates both the circumferential rotation and axial lifting motion of the rotary switch 3321, ensuring that the operation of the lever 3323 is not interfered with by the lifting of the rotary switch 3321, thus improving structural compatibility and smoothness of movement. The vertical sliding design compensates for displacement changes during the lifting of the rotary switch 3321, preventing lateral forces between the pin 33231 and the elongated sliding hole 33213, reducing component wear, and extending service life. The bidirectional sliding engagement makes the structural design more flexible, eliminating the need for additional compensation components and simplifying the overall structure of the lifting module 332. The length of the pin 33231 needs to be determined based on the maximum lifting stroke of the rotary switch 3321.

[0312] In one embodiment, such as Figures 27-29 , Figure 35 and Figure 36 As shown, Figure 40 and Figure 41As shown, the lever 3323 extends outward to the outside of the bottom support assembly 33. The bottom support assembly 33 has a guide hole 104 extending in a first direction. The lever 3323 slides in conjunction with the guide hole 104. The lever 3323 has a limiting groove 33232 that engages with the edge of the guide hole 104. The guide hole 104 guides the sliding direction of the lever 3323, ensuring precise operation. The engagement of the limiting groove 33232 with the edge of the guide hole 104 guides the sliding process of the lever 3323, preventing structural damage during the sliding process and avoiding the lever 3323 from detaching from the guide hole 104 and falling into or outside the outer casing 10, causing the lifting module 332 to malfunction. The external operation design avoids user contact with the internal components of the purifier, improving safety and preventing dust contamination of the internal components.

[0313] In one embodiment, such as Figures 26-38 As shown, the bottom frame 331 surrounds the lower purification outlet 3311 and has a second mounting part 3312 formed as a cylinder. The lifting module 332 is sleeved on the outside of the second mounting part 3312, and the tray 333 is located above the second mounting part 3312.

[0314] The second mounting part 3312 can be integrally formed with the bottom frame 331, or it can be assembled onto the bottom frame 331 as an independent component. Its height can be optimized according to the lifting stroke of the lifting module 332. The cylindrical second mounting part 3312 provides a coaxial mounting reference for the lifting module 332 and the tray 333, ensuring that the tray 333 is arranged horizontally around the lower purification outlet 3311, avoiding uneven clamping of the filter screen 31 due to the tilt of the tray 333, and improving the smoothness of the filter screen 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.

[0315] In one embodiment, such as Figures 30-38 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.

[0316] A first flange 3331 extending downwards is provided on the outer edge of the tray 333, which, together with the second mounting part 3312 of the central cylinder, defines a first receiving space 3301 for accommodating the lifting module 332. This achieves functional partitioning, concealment of the lifting module 332, and structural reinforcement of the tray 333.

[0317] 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 the outer wall of the fixed cylindrical second mounting portion 3312, forming a ring-shaped semi-enclosed cavity. The lifting module 332 is "stored" and "hidden" under the tray 333, physically isolating it from the filter 31 above.

[0318] Integrating the load-bearing surface of tray 333 with the lateral enclosure structure significantly enhances the rigidity of the tray 333's edges, preventing it from curling or deforming when subjected to off-center loads or rotational inertia forces from the filter screen 31. The gap between the flange and the second mounting part 3312 is precisely calculated to accommodate the lifting module 332 while also providing radial guidance or limiting, thus improving the overall stability of the tray 333's movement.

[0319] 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.

[0320] The first flange 3331 and the second mounting part 3312 enclose a first accommodating space 3301, completely concealing the lifting module 332 beneath the tray 333. This provides enclosed protection for the lifting module 332, preventing dust, hair, and other foreign objects from entering and causing jamming, thus extending the component's lifespan. The enclosed accommodating space makes the purifier's internal structure cleaner and easier to clean and maintain. The first flange 3331 enhances the structural rigidity of the tray 333, improving its support for the filter 31 and preventing deformation of the tray 333 due to excessive force.

[0321] In one embodiment, such as Figures 26-31 , Figures 34-38 As shown, a ball assembly is provided between the tray 333 and the lifting module 332. The ball assembly includes multiple balls 334, and at least a portion of the multiple balls 334 are located at the angle between the first flange 3331 and the tray 333.

[0322] A ball bearing assembly is provided between the tray 333 and the lifting module 332, and at least a portion of the plurality of balls 334 are specifically arranged at the angle between the first flange 3331 and the tray 333. Rolling friction can be used instead of sliding friction.

[0323] 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 greatly reduces the frictional resistance that the tray 333 needs to overcome when rotating.

[0324] The ball bearings 334 are positioned at the internal angle formed by the first flange 3331 and the tray 333. This allows them to bear the vertical load of the tray 333, adapt to and facilitate its rotation through their own rolling motion, and also constrain its radial wobble to a certain extent. The distributed arrangement of multiple ball bearings 334 optimizes force and motion: Using multiple ball bearings 334 distributed circumferentially ensures that the supporting force on the tray 333 is uniform, discrete, and high-density. This avoids stress concentration, tray deformation, or rotational instability that could result from single-point or few-point support. The multiple ball bearings 334 together form a low-friction, high-precision "plane bearing," ensuring smooth rotation of the tray 333 even on imperfect support surfaces.

[0325] The ball bearing assembly transforms the sliding friction between the tray 333 and the lifting module 332 into rolling friction, significantly reducing the frictional resistance during filter rotation, resulting in smoother rotation of the filter 31 and reduced load and power consumption of the drive motor 3223. The balls 334 are positioned at the angle between the first flange 3331 and the tray 333, using the flange for limiting and preventing the balls 334 from falling off, thus improving the structural stability of the ball bearing assembly. Simultaneously, the even distribution of multiple balls 334 ensures more uniform force distribution on the tray 333, eliminating jamming during rotation. Rolling friction reduces component wear, extends the service life of the tray 333 and the lifting module 332, and reduces maintenance frequency. The lateral placement of the balls 334 solves the problem of decreased accuracy caused by deviations resulting from relying on a single ball 334 or spring connection to limit the tray 333 in traditional structures, providing better support and limiting effect, ensuring smooth rotation without deviation or vibration.

[0326] In one embodiment, such as Figures 26-38 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.

[0327] 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.

[0328] The second flange 3332 and the second mounting part 3312 enclose a second receiving space 3302, providing a stable installation position for the sealing structure 32335. This ensures that the sealing structure 32335 fits tightly against the tray 333 and the second mounting part 3312, improving the sealing performance of the lower purification outlet 3311. The sealing structure 32335 prevents unfiltered airflow from entering the lower air outlet 102 through the gap between the tray 333 and the second mounting part 3312, avoiding airflow short-circuiting and ensuring that all airflow is filtered by the filter screen 31, thus improving purification efficiency. The second flange 3332 enhances the structural rigidity of the inner ring of the tray 333, preventing the inner ring of the tray 333 from deforming under stress. It also protects the sealing structure 32335 from being crushed or damaged.

[0329] In one embodiment, such as Figure 26 , Figure 27 and Figures 35-38 As shown, the filter module 30 also includes an upper cover plate 336, which is located above the bottom frame 331. The upper cover plate 336 has a second opening 3361, through which the tray 333 passes and cooperates with the filter screen 31. In the first state, the tray 333 is at the same height as the upper cover plate 336.

[0330] The top cover 336 can be integrally formed with the bottom frame 331, or it can be connected as a separate component via clips or screws. Its material can be an easy-to-clean smooth plastic or a material with an antibacterial coating. The top cover 336 provides protection above the bottom frame 331, while also ensuring a smooth surface on the air duct wall defined above it. The second opening 3361 provides clearance for the lifting and lowering movement of the tray 333, ensuring that the tray 333 and the filter 31 do not interfere with each other. In the first state, the tray 333 and the top cover 336 are flush, creating a flat operating surface inside the purifier. The filter 31 can be smoothly slid in and out horizontally, avoiding jamming due to height differences and further improving the ease of replacement. The top cover 336 closes the upper part of the bottom frame 331, reducing the amount of foreign objects falling onto the structurally complex bottom frame 331 and improving the overall cleanliness of the appearance during filter installation.

[0331] The following describes the complete operating steps for replacing filter module 30 and filter screen 31 with reference to the attached diagram.

[0332] Confirm the air purifier is powered off: Turn off the device's power switch. If the device is connected to an external power source, unplug the power cord to avoid the risk of electric shock during replacement. Clear the operating space: Ensure there are no obstructions around the purifier, especially in the area on the outside of the outer casing 10 corresponding to the lever 3323. Leave at least 5cm of operating space for the lever 3323 to slide smoothly. Prepare the new filter 31. Confirm that the new filter 31 is the compatible model. Check that the cylindrical structure of the filter 31 is intact and undamaged, and that its upper and lower mating surfaces are clean and free of foreign objects. Locate the lever 3323 extending outwards on the periphery of the purifier casing 10. The lever 3323 slides into the guide hole 104 of the outer casing 10, and the lever 3323 has a limiting groove 33232 that matches the edge of the guide hole 104. It is currently in the "locked position" by default, and the filter module 30 is in the second state.

[0333] Move lever 3323 to the unlock position, and push lever 3323 along the horizontal extension direction of guide hole 104, i.e., the first direction, until lever 3323 engages with the end hole on the other side of guide hole 104. At this time, lever 3323 is in the "unlock position".

[0334] When the lever 3323 is pushed, its vertical pin 33231 slides along the extension direction of the long sliding hole 33213, and drives the rotary switch 3321 to rotate, so that the rotary switch 3321 rotates to the "open position" around the second mounting part 3312 formed by the bottom frame 331 into a cylinder. The first groove on the lower surface of the rotary switch 3321 slides relative to the first protrusion 3313 of the bottom frame 331. Under the guidance of the first driving inclined surface 33131 on the first protrusion 3313, the rotary switch 3321 descends axially.

[0335] The second driving inclined surface 332121 on the upper surface of the rotating switch 3321 synchronously drives the slider structure 3322 to descend along the vertical guide rail of the bottom frame 331, eventually causing the tray 333 to descend to the first height along with the slider structure 3322, which is level with the height of the upper cover plate 336. The filter module 30 enters the first state, at which time the filter screen 31 can be moved freely in the horizontal direction for replacement.

[0336] Remove the old filter screen horizontally. The filter screen 31 is sandwiched between the upper mating structure and the tray 333. Pull the filter screen 31 outward horizontally until it is completely detached from the lower area of ​​the upper mating structure and the support surface of the tray 333. Install the new filter screen horizontally and push it between the upper mating structure and the tray 333. The lower end face of the filter screen 31 should fit the support surface of the tray 333. At this time, the filter screen is in the "pre-installation position", and its central axis should be as coincident as possible with the central axis of the upper mating structure and the tray 333.

[0337] During the insertion process, the drive structure 32212 of the top support assembly 32 may be located on the horizontal movement path of the filter 31. However, since the first transmission structure 3221 can move up and down a certain distance, under the drive of the filter 31, the drive structure 32212 may move upward to avoid the filter 31 until it reaches the pre-installation position. After that, the drive structure 32212 loses the constraint of the filter 31, moves downward, and engages with the filter 31. The user can determine whether the filter 31 is installed in the pre-installation position based on whether the drive structure 32212 falls.

[0338] Move the lever 3323 in the reverse direction to the locked position until the limiting groove 33232 of the lever 3323 engages with the starting end hole of the guide hole 104. At this point, the lever 3323 cannot move further and is in the "locked position". The lever 3323 drives the pin 33231 to slide in the reverse direction, causing the rotary switch 3321 to rotate around the second mounting part 3312 to the "locked position". The first groove on the lower surface of the rotary switch 3321 slides along the first driving inclined surface 33131 of the first protrusion 3313 of the bottom frame 331. The lifting effect of the inclined surface causes the rotary switch 3321 to rise axially.

[0339] The second driving inclined surface 332121 on the upper surface of the rotary switch 3321 pushes the slider structure 3322 to rise along the vertical guide rail. The tray 333 rises synchronously with the slider to the second height, and the filter screen 31 is clamped between the tray 333 and the upper mating structure to achieve circumferential limiting and axial fixing.

[0340] At this time, the ball bearing structure 325 contacts and engages with the lower surface of the cover 323, the filter module 30 enters the second state, and the filter screen 31 can rotate synchronously with the upper engaging structure.

[0341] To restore power to the device: Plug the power cord into the socket and turn on the device's power switch. The device will then enter standby mode.

[0342] This application decouples the gravity bearing and rotation drive tasks of the filter 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 31. The gravity of the filter 31 is transferred to the bottom frame 331 through the tray 333, and finally, the outer shell 10 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 do 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 bottom drive mode, and creating a low-load working environment for the drive component 322.

[0343] The drive assembly 322 does not need to resist the gravity of the filter screen; it only needs to output rotational torque to drive the filter screen 31. This avoids technical faults such as jamming, uneven speed, and inability to rotate caused by gravity load in the traditional bottom drive mode. It can be used to drive large-diameter, high-density high-efficiency filters, solve the problem of insufficient motor torque, improve the smoothness of operation, extend the life of the drive assembly 322, and reduce energy consumption.

[0344] Meanwhile, the tray 333 adopts a "rotatable setting" structural design, which is connected to the bottom frame 331 through ball bearings 334 or sliding bearings, so that the tray 333 can rotate synchronously with the filter screen 31, which can realize the function of gravity bearing without hindering the rotation of the filter screen, and at the same time, it does not generate rotational resistance, realizing the coordinated work of the tray 333 in bearing and following.

[0345] The filter module 30 adopts a modular design consisting of a top support component 32, a bottom support component 33, and a filter screen 31. The top support component 32 integrates the driving function and the function of limiting the upper airflow duct 212, while the bottom support component 33 integrates the load-bearing function and the function of limiting the lower airflow duct. The filter screen 31 is placed between the two components. This structure makes the functional boundaries of each component clear. During assembly, the two main components can be fixed in the housing 10 first, and then the filter screen 31 can be installed, simplifying the assembly process. During maintenance, any module can be disassembled and assembled individually, effectively simplifying the assembly process and significantly reducing the difficulty of maintenance.

[0346] Furthermore, the top-driven layout provides more space below the bottom frame 331 inside the shell 10, enabling structural avoidance.

[0347] In summary, this application overturns the traditional layout where the filter 31 is driven by the lower tray 333. Instead, it integrates the drive assembly 322 into the top frame 321, so that the weight of the filter 31 is supported by the lower tray 333. The drive assembly 322 does not need to do 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.

[0348] In one embodiment, such as Figures 19 to 23 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 screen 31 is disposed between the first transmission structure 3221 and the tray 333 and rotates synchronously with the first transmission structure 3221.

[0349] The first transmission structure 3221 serves as a dedicated power intermediary between the drive motor 3223 and the filter screen 31. Its core function is to achieve a smooth transition of torque and a change in direction. The rotational power output by the drive motor 3223 first acts directly or indirectly on the first transmission structure 3221, and the power is transmitted to the filter screen 31 through the transmission cooperation between the first transmission structure 3221 and the filter screen 31.

[0350] The first transmission structure 3221 and the filter screen 31 can be coupled through insertion, snap-fit, or contact friction to transmit torque. The rigidity of the first transmission structure 3221 can be used to attenuate the torque fluctuations of the drive motor 3223, preventing instantaneous impact loads from directly acting on the filter screen 31. Simultaneously, the first transmission structure 3221 rotates around the shaft 3231 of the top frame 321, which provides a fixed center of rotation, ensuring that the axis of the first transmission structure 3221 always coincides with the axis of the filter screen 31 during power transmission, forming a "coaxial transmission" system and eliminating the influence of radial force on power transmission efficiency.

[0351] The filter screen 31 is clamped between the first transmission structure 3221 and the tray 333, forming a two-way constraint of upper drive and lower load. The lower side of the first transmission structure 3221 and the upper side of the tray 333 limit the filter screen 31 on both sides of the axial direction, ensuring that the filter screen 31 has no axial movement and can achieve synchronous rotation.

[0352] The first transmission structure 3221 serves as a power transmission intermediary between the drive motor 3223 and the filter screen 31, achieving a smooth power transition and avoiding torque fluctuations caused by the direct connection between the drive motor 3223 and the filter screen 31. This further improves the smoothness of the filter screen rotation. The filter screen 31 is clamped between the first transmission structure 3221 and the tray 333, forming a bidirectional upper and lower limit. There is no axial movement during rotation. In conjunction with the coaxial rotation drive of the first transmission structure 3221, it ensures that the filter screen 31 always rotates around the preset axis without any eccentricity or vibration.

[0353] 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.

[0354] In one embodiment, such as Figure 19 , Figure 20 and Figures 22-23 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.

[0355] The first transmission structure 3221 is designed as a ring-shaped or frame-like body surrounding the first opening 3211, so that the central area of ​​the first opening 3211 forms a continuous airflow channel that minimizes mechanical obstruction. This arrangement ensures that the air purified by the filter 31 can pass directly through the first opening 3211 and flow unobstructed to the upper purification outlet 3230 connected to the upper air outlet 101, thereby minimizing airflow resistance and wind loss.

[0356] The transmission part 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 meshing with the outer peripheral transmission part or through friction transmission with a pulley. This peripheral drive design substantially increases the lever arm of the driving force, which reduces the instantaneous force required by the drive motor 3223 to output the same torque, thereby reducing the requirement for the peak torque of the motor and improving the mechanical efficiency and stability of the transmission system.

[0357] The first transmission structure 3221 is arranged around the first opening 3211, reserving a flow channel for the filtered clean air. Air can smoothly enter the upper purification outlet 3230 through the first opening 3211, avoiding the transmission structure from obstructing the air duct and increasing airflow resistance, thus ensuring airflow efficiency. The transmission part is located on the outer peripheral surface of the transmission body 32213. The drive motor 3223 cooperates with the transmission part on the outer peripheral surface, without occupying the space of the central air duct, optimizing the spatial layout of the top frame 321 and making the structure more compact. The transmission cooperation method on the outer peripheral surface increases the lever arm of power transmission, reduces the instantaneous load of the drive motor 3223, further reduces power consumption, and improves the stability of torque transmission.

[0358] In other embodiments, the transmission part may also be formed on the inner circumferential surface of the transmission body 32213 or other locations, which are not limited here.

[0359] In one embodiment, such as Figure 23 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.

[0360] 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.

[0361] The transmission components can be structures such as reduction gear sets, drive shafts, and pulleys, and are not limited here.

[0362] 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 31, preventing dust accumulation on the filter from contaminating the drive components and extending the service life of the drive assembly 322. This independent modular layout facilitates the individual disassembly and maintenance of the drive assembly 322 without disassembling the filter 31 or other components, reducing maintenance difficulty.

[0363] In one embodiment, such as Figure 22 , Figure 23 and Figure 25 As shown, the transmission part is formed as a first transmission gear 322131, and the drive assembly 322 also includes a second transmission structure, which is formed as a second transmission gear 3222 that meshes with the first transmission gear 322131.

[0364] The transmission unit is designed as the first transmission gear 322131, and a second transmission structure, namely the second transmission gear 3222, is added to the drive assembly 322 to mesh with it, thus forming a compact gear meshing transmission system.

[0365] Power is transmitted using a first transmission gear 322131 and a second transmission 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 screen 31 connected thereto.

[0366] The torque output by the drive motor 3223 acts directly on the tooth surface of the first transmission gear 322131 through the second transmission 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.

[0367] 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 efficiently applied to the filter screen 31. The rigid connection of the gear mesh allows for precise control of the rotational speed of the first transmission structure 3221, ensuring uniform rotation of the filter screen 31 and guaranteeing consistent filtration. This prevents incomplete filtration caused by speed fluctuations. The gear transmission also boasts strong load-bearing capacity, making it suitable for large-diameter, high-density filter screens 31. Even if dust accumulation on the filter screen increases rotational resistance, stable rotation is maintained, preventing motor overload damage.

[0368] In one embodiment, such as Figure 23 As shown, the tooth ratio between the second transmission gear 3222 and the first transmission gear 322131 is no greater than 1 / 2. That is, the number of teeth of the second transmission 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.

[0369] In gear transmission, the gear ratio between the driving gear (second transmission gear 3222) and the driven gear (first transmission 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.

[0370] This gear ratio setting also takes into account the space constraints of arranging the second transmission gear 3222. A smaller second transmission gear 3222 has a smaller radial dimension, which helps it to be arranged flexibly in the limited space above the top frame 321, better avoid the central first opening 3211 air duct, and achieve a compact direct or close drive with the drive motor 3223, reducing intermediate links.

[0371] In one embodiment, such as Figure 23 As shown, the drive shaft of the drive motor 3223 is coaxially and fixedly connected to the second transmission gear 3222. This achieves extreme simplification and minimization of the power transmission path.

[0372] The output shaft of the drive motor 3223 directly serves as the rotating shaft 3231 of the second transmission 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 second transmission gear 3222 with zero distance and no intermediate links, minimizing the connection points that may cause torsional elastic deformation, backlash, or energy loss.

[0373] The drive shaft and the second transmission gear 3222 are coaxially fixed, ensuring that the power transmission path is along the axial direction, without generating eccentric torque. This avoids tooth surface wear caused by lateral forces during gear meshing, extending gear life. The coaxial connection reduces intermediate links in power transmission, lowers torque loss, improves transmission efficiency, and simplifies the assembly structure, reducing production and assembly difficulty. The coaxial fixed structure has strong stability; during long-term, high-frequency operation, the gear meshing clearance will not change due to component offset, maintaining a stable transmission ratio and torque output. The drive motor 3223 and the first transmission gear 322131 are only connected via the second transmission gear 3222, simplifying the structure of the drive assembly 322, reducing production and design costs, and saving space costs associated with arranging the drive assembly 322.

[0374] 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 second transmission gear 3222 are splined to transmit greater torque and ensure circumferential positioning between them.

[0375] In one embodiment, such as Figure 22 , Figure 23 and Figure 25 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.

[0376] 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.

[0377] 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.

[0378] By making a portion of the first transmission structure 3221, typically its upper part, protrude from the upper surface of the top frame 321, and shaping its outer periphery into the transmission part of the protrusion, the key functional area for realizing the transmission is essentially raised above the operating plane of the top frame 321. This design achieves axial separation between the load-bearing interface, i.e., the contact area between the bottom surface and the stepped surface 3212, and the transmission working interface; placing the transmission working area in a relatively open and easily accessible space, rather than in a hidden location recessed thereunder.

[0379] The first transmission structure 3221 is embedded in the first opening 3211 through the stepped surface 3212, achieving radial limiting and ensuring that its rotation center coincides with the axis of the filter screen 31. This avoids vibration and noise caused by eccentric rotation and improves 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 design makes the connection between the first transmission structure 3221 and the top frame 321 more compact, improving the rigidity of the overall structure and resisting vibration and impact during operation.

[0380] In one embodiment, such as Figures 18-20 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 screen 31 to move along the axial direction through the tray 333.

[0381] This application enables the filter module 30 to dynamically switch between a first state and a second state through the active deformation of the mechanical structure, adapting to the installation and maintenance conditions and stable working conditions of the filter screen 31 respectively.

[0382] The first state is the installation or maintenance state of the filter module 30, and the second state is the working and locked state of the filter module 30. This division structurally decouples the space transfer requirements of the filter module 30 in the installation or maintenance state from the rigid coupling requirements of the filter module 30 in the working and locked state.

[0383] In the first state, by controlling the tray 333 to be at a lower first height, an axial gap sufficient for the filter 31 to move freely horizontally is created between the tray 333 and the upper first transmission structure 3221. This creates the physical conditions for unobstructed access to and placement of the filter 31.

[0384] 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 filter 31 and enhances the user experience.

[0385] The switching between states is accomplished by the lifting module 332 as both the power source and the actuator. When it is necessary to enter the working state, the lifting module 332 outputs power to precisely lift the tray 333 from the first height to a higher second height. This lifting action actively eliminates the aforementioned axial clearance and causes the filter screen 31 to be synchronously limited by the upper first transmission structure 3221 and the lower tray 333, thereby clamping it between the two.

[0386] In the second state, the filter 31 is axially limited, which effectively prevents the filter 31 from axial movement, radial eccentricity or circumferential slippage that may occur during high-speed rotation. This makes the filter 31 rotate smoothly and at a uniform speed, significantly reducing operating noise and overall machine vibration caused by vibration and eccentricity. At the same time, it ensures the uniformity of airflow when passing through the filter and improves the consistency of purification effect.

[0387] In summary, the filter module 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 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 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. With the filter 31 clamped, the rotational drive force is transmitted more stably, avoiding 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.

[0388] Since the filter 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 module 30, so as to achieve a better driving effect that is not affected by the gravity of the filter 31.

[0389] The lifting module 332 drives the tray 333 to move the filter screen 31 axially, enabling automatic coordination between the filter screen 31 and the drive assembly 322. This ensures convenient operation and guarantees that the filter screen 31 can rotate under the drive of the drive assembly 322. The axial lifting function adaptively adjusts the distance between the tray 333 and the first transmission structure 3221, ensuring that both can limit the filter screen 31 axially. The filter screen 31 is clamped between the first transmission structure 3221 and the tray 333, forming a bidirectional upper and lower limit. There is no axial movement during rotation. Combined with the coaxial rotation drive of the first transmission structure 3221, this ensures that the filter screen 31 always rotates around a preset axis without any eccentricity or vibration.

[0390] In one embodiment, such as Figures 18-20 , Figure 22 and Figure 23As 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.

[0391] 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.

[0392] 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.

[0393] 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.

[0394] In one embodiment, such as Figure 23 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.

[0395] The cover 323 directly forms the upper purification outlet 3230, and a mesh cover 324 is further provided above the cover 323 to cover the upper purification outlet 3230. The mesh cover 324, as a component with regular pores, covers the entire upper purification outlet 3230. It acts as a selective filtration barrier located in the air outlet path. As the most visible part at the top of the device, the mesh cover 324 physically prevents the user from contacting the internal structure of the filter module 30.

[0396] The mesh cover 324 covers the purification outlet 3230, effectively preventing foreign objects from falling into the internal space of the filter module 30, further enhancing the protection of the filter module 30, and preventing users from accidentally touching internal operating parts during use, thus improving safety. The mesh cover 324 also straightens the discharged clean airflow, dispersing the concentrated airflow into a uniform diffused airflow, accelerating the mixing speed of clean air and indoor air, and improving purification efficiency.

[0397] In one embodiment, such as Figure 19 , Figure 20 and Figure 22 As shown, a rotating shaft 3231 is located at the center of the cover 323. A first transmission structure 3221 cooperates with the rotating shaft 3231 to rotate around the rotating shaft 3231. An extension rib 3232 connects the rotating shaft 3231 and the cover 323. The rotating shaft 3231 is located at the center of the cover 323. The first transmission structure 3221 achieves rotational cooperation with the rotating shaft 3231 through a central hole or bearing, thereby rotating around the rotating shaft 3231. Simultaneously, the rotating shaft 3231 and the main body of the cover 323 are connected and reinforced by the extension rib 3232.

[0398] The rotating shaft 3231 provides the absolute reference rotation center for the rotation of the first transmission structure 3221. By directly setting the rotating shaft 3231 at the geometric center of the cover 323, the axis of the rotating shaft 3231 becomes the immovable absolute rotation reference line defined by the entire top drive module. Through its cooperation with the rotating shaft 3231, the rotation center of the first transmission structure 3221 is forcibly constrained to this reference line. This ensures the coincidence of the rotation axis of the first transmission structure 3221, the theoretical rotation axis of the filter 31, and the central air duct axis of the equipment, achieving coaxial transmission.

[0399] 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.

[0400] The pivot 3231 at the center of the cover 323 provides precise rotation center positioning for the first transmission structure 3221, ensuring that the first transmission structure 3221 always rotates around a preset axis and completely coincides with the axis of the filter screen 31, eliminating eccentric rotation problems and improving rotation smoothness. The extension rib 3232 strengthens the connection between the pivot 3231 and the cover 323, preventing the pivot 3231 from bending and deforming under radial force, maintaining positioning accuracy during long-term operation, and extending the service life of the structure. The integrated design of the pivot 3231 and the extension rib 3232 eliminates the need for additional positioning components, simplifying the structure and reducing production and assembly costs.

[0401] In one embodiment, such as Figure 22 and Figure 23 As 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 sealed 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, and extending the motor's service life.

[0402] In one embodiment, such as Figure 19 and Figure 20 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.

[0403] 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.

[0404] 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.

[0405] In one embodiment, such as Figure 19 , Figure 20 and Figure 21As 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.

[0406] The filter module 30 includes a first state and a second state. In the first state, the tray 333 is at a first height, and the first transmission structure 3221 contacts and engages with the top frame 321 under 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 screen 31 rises with the tray 333 and drives the first transmission structure 3221 to move upward, so that the ball structure 325 contacts and engages with the lower surface of the cover 323.

[0407] Rolling friction not only reduces resistance but also makes the movement smoother and more continuous. This makes the rotation of the first transmission structure 3221 and even the entire filter screen 31 more uniform and smooth, reducing vibration 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. 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 can be lifted to a high position and then fall back to a low position during installation, providing maximum unobstructed operating space for filter screen insertion, making installation easy. After entering the second state, the tray 333 rises to automatically complete the docking and pre-tightening of the filter screen with the first transmission structure 3221, the process is smooth, and the user experience is excellent. In the second state, the first transmission structure 3221 is lifted from below by the filter screen and the tray 333, forming a defined relative position with the cover 323 through the ball bearings 334, and the entire transmission chain remains rigidly locked in the axial direction, with no axial movement.

[0408] 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.

[0409] 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 contacts 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 31, the tray 333 can be moved down and the first transmission structure 3221 moved up simultaneously, providing more space for filter installation and allowing for easy placement and removal by the user. In the second state, a rigid transmission chain is formed, ensuring stable power transmission while maintaining both convenience and reliability.

[0410] In one embodiment, such as Figures 19-20 , Figure 22 , Figure 23 and Figure 25 As shown, the drive structure 32212 is located below the first transmission structure 3221 and is inserted into the filter screen 31 along the axial direction, and the circumferential limit between the filter screen 31 and the drive structure 32212 is achieved through the insertion and engagement.

[0411] In related technologies, the filter screen 31 relies on the friction of the rotating tray 333 to drive its rotation, lacking a forced concentricity and circumferential limiting structure. This leads to eccentricity and slippage during rotation, and the friction-driven rotation is prone to slippage, resulting in poor rotational smoothness. This application designs the drive structure 32212 and the mating structure as a plug-in connection along the axis of the filter screen 31. This plug-in action achieves both physical connection and, through structural adaptation, restricts their relative circumferential rotation, forcing the filter screen 31 and the drive structure 32212 to rotate coaxially, avoiding eccentricity errors. At least one of the filter screen 31 or the top support assembly 32 is movable along the axis, allowing for removal after disengagement during replacement. This avoids the impact of traditional fixed plug-in structures on installation convenience, ensuring quick and accurate alignment during installation.

[0412] Therefore, this application achieves circumferential limiting directly by axially inserting the drive structure 32212 with the mating structure, abandoning the traditional friction drive method. Structurally, it ensures the concentricity of the rotation of the filter screen 31 and the drive structure 32212, avoiding eccentric movement and making the rotation smoother. At the same time, the filter screen 31 can move along the axis, and there is no need for forced alignment when replacing it. With the guiding characteristics of the insertion structure, it not only solves the problem of poor concentricity, but also takes into account the convenience of installation and avoids the insertion process affecting the replacement efficiency.

[0413] In one embodiment, such as Figures 19-25As shown, one of the mating structure and the driving structure 32212 is formed as a socket 3121, and the other is formed as a plugging protrusion extending along the axial direction. The plugging protrusion and the socket 3121 are plugged in and mated. By utilizing the cavity constraint of the socket 3121 and the guiding characteristics of the plugging protrusion, a clear axial mating path is formed to avoid misalignment and interference during plugging and to ensure mating accuracy and concentricity.

[0414] The mating length between the plug protrusion and the socket 3121 is less than the distance that the filter screen 31 can move relative to the top support assembly 32 within the housing 10 along the axial direction, allowing sufficient separation travel. When the filter screen 31 or the top support assembly 32 moves, it can completely disengage from the plugging engagement or achieve a deep and reliable plugging, avoiding problems such as "too tight a fit to separate" or "too shallow a fit to cause transmission failure".

[0415] Therefore, this application clarifies the insertion guide path, making the fit more precise and avoiding misalignment and interference; the limitation of the fit length ensures that the filter 31 can be completely separated or reliably fitted, and the switching process is smooth without jamming. This not only ensures the transmission stability during rotation, but also makes the separation operation when replacing the filter smoother, improving the ease of use.

[0416] In one embodiment, such as Figures 21-25 As shown, multiple first limiting ribs 31211 extending axially and spaced apart are formed inside the inner wall of the socket 3121, and multiple second limiting ribs 322121 extending axially and spaced apart are formed on the insertion protrusion. When the insertion protrusion and the socket 3121 are inserted into each other, the second limiting ribs 322121 are inserted between two adjacent first limiting ribs 31211.

[0417] In one embodiment, such as Figure 21 As shown, the first limiting rib 31211 includes multiple ribs evenly arranged circumferentially. The circumferential distance between two adjacent first limiting ribs 31211 is greater than the circumferential width of the second limiting rib 322121. Using the rotation center of the filter screen 31 as a reference, the first limiting ribs 31211 are evenly distributed circumferentially to ensure that after the second limiting rib 322121 is inserted, the circumferential force points are symmetrically distributed, with no local stress concentration, thus strengthening concentricity constraints. The design of the circumferential distance between adjacent first limiting ribs 31211 being greater than the circumferential width of the second limiting rib 322121 allows for a reasonable assembly gap, accommodating 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 screen 31 from shifting due to uneven force and ensuring rotational concentricity.

[0418] In one embodiment, such as Figure 25As shown, the second limiting ribs 322121 include multiple ribs evenly arranged circumferentially. The circumferential distance between two adjacent second limiting ribs 322121 is greater than the circumferential width of the first limiting rib 31211. Using the rotation center of the filter screen 31 as a reference, the second limiting ribs 322121 are evenly arranged circumferentially, echoing the even distribution of the first limiting ribs 31211. This ensures that the force points of the ribs are bidirectionally symmetrical during engagement, with no local stress concentration, thus doubly reinforcing concentricity constraints from both the drive end and the filter screen 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 rib jamming or excessively tight engagement.

[0419] In one embodiment, such as Figure 21 As shown, the first limiting rib 31211 and / or the second limiting rib 322121 are provided with guide slopes 3401. The guide slopes 3401 extend obliquely from the center of the circumference of the limiting rib 721 towards both sides in the insertion direction. By providing guide slopes 3401 on the first limiting rib 31211 and / or the second limiting rib 322121, the slopes incline from the center of the rib towards both sides in the insertion direction. Utilizing the guiding effect of the slopes, the end faces of the ribs first contact the slopes during insertion, automatically correcting slight alignment deviations and guiding the ribs smoothly into the mating gap, avoiding hard-hitting interference. The guide slopes 3401 change the rib engagement from "hard end face contact" to "progressive slope contact," dispersing the impact force during insertion, reducing wear and damage to the edges of the ribs, while maintaining the circumferential limiting area after engagement, ensuring torque transmission efficiency.

[0420] In other embodiments, the insertion protrusion is also formed as a splined shaft or a polygonal boss, and the socket 3121 is formed as a splined groove or a polygonal recess that matches the splined shaft or polygonal boss. Utilizing the mature structural characteristics of spline and polygonal mating, circumferential positioning is more reliable, and transmission torque loss is small; the high degree of structural standardization ensures easy processing accuracy, and can stably maintain the concentricity of the filter screen 31 and the drive structure 32212, avoiding wobbling during rotation and making rotation smoother.

[0421] In one embodiment, such as Figure 18 , Figure 19 and Figure 22 As shown, the insertion protrusion includes a guide portion 3402, which extends obliquely outward from the insertion protrusion in the insertion direction.

[0422] Furthermore, the guide portion 3402 extends outward at an angle along the insertion direction, forming a "flared" guide structure. This significantly expands the effective range of initial alignment, allowing the socket 3121 to contact the guide portion 3402 without precise alignment, reducing the difficulty of alignment during manual installation. The angled guide surface utilizes the guiding characteristics of the inclined surface to automatically correct the radial deviation between the socket 3121 and the insertion protrusion during insertion by using 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 altering the precise mating structure at the rear end, ensuring reliable circumferential limiting and coaxial positioning even after insertion.

[0423] In one embodiment, such as Figures 19-22 As shown, the socket 3121 includes a guide mating portion 3403, which extends obliquely inward toward the inside of the socket 3121 in the insertion direction. The guide mating 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 mating portion 3403 together expand the initial alignment range, guiding them to fit precisely.

[0424] In some embodiments, the tilt angle of the guide mating part 3403 is adapted to the insertion protrusion guide part 3402. 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 inlet end of the socket 3121 and does not change the precise mating contour inside the socket 3121. After the guidance is completed, the mating structure of the insertion protrusion is precisely connected to the internal structure of the socket 3121, ensuring both ease of assembly and without affecting the circumferential limiting and coaxial positioning accuracy.

[0425] 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 screen 31 move up and down more smoothly. The guide mating part 3403 can correct slight installation misalignment and ensure that the drive structure 32212 and the mating structure are precisely coaxial, ensuring rotational concentricity.

[0426] In one embodiment, such as Figures 19-24 As shown, the socket 3121 is formed on the filter 31, which reduces the number of additional connectors on the filter 31, simplifies the structure of the filter 31, and reduces replacement costs.

[0427] In other embodiments, the insertion protrusion is arranged around the rotation center of the filter 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 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.

[0428] In some other embodiments, the insertion protrusions include a plurality of protrusions arranged around the rotation center of the filter screen 31 and evenly distributed in the circumferential direction. That is, multiple insertion protrusions with the same structural shape can simultaneously engage with the socket 3121, which can also achieve the above-mentioned purpose, ensuring the circumferential force balance. Each insertion protrusion shares the torque, avoiding stress concentration in a single mating structure. The even distribution makes the filter screen 31 subjected to symmetrical force, without off-center load during rotation, solving the problem of uneven rotation, and improving the load-bearing capacity of the mating structure.

[0429] In one embodiment, such as Figure 22 As shown, the filter screen 31 includes a cylindrical filter cotton 311 and end cap structures disposed on both axial sides of the filter cotton 311, with the mating structure formed on the end cap structures.

[0430] If the mating structure is directly formed on the filter cotton 311, the soft material and loose structure of the filter cotton 311 cannot provide a stable installation reference and torque bearing capacity, which can easily lead to misalignment and deformation of the mating structure, disrupting concentricity. Simultaneously, the filter cotton 311 is unrestrained axially, making it prone to displacement and wrinkling during rotation, affecting filtration efficiency and rotational smoothness. By setting end cap structures on both axial sides, made of rigid materials, the end caps provide a stable mounting carrier for the mating structure, preventing misalignment due to filter cotton 311 deformation and ensuring precise coaxiality between the mating structure and the rotation center of the filter screen 31. The end caps fit snugly against the axial end faces of the filter cotton 311, fixing it through positioning and snap-fitting methods, limiting axial displacement and radial deformation of the filter cotton 311, maintaining the integrity of the cylindrical structure of the filter screen 31, and preventing airflow turbulence or increased rotational resistance caused by wrinkles or misalignment of the filter cotton 311 during rotation. In addition, with the structure formed after the end cap, the driving torque is evenly transmitted to the entire filter cotton 311 through the end cap, avoiding structural damage caused by the torque being concentrated in a local area of ​​the filter cotton 311; at the same time, the two end caps form symmetrical support, balancing the axial force on the filter screen 31 and avoiding eccentricity caused by unilateral force.

[0431] In one embodiment, such as Figure 22As 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.

[0432] By setting up reinforcing ribs 3123 that extend radially and are spaced circumferentially, one end of which is connected to the mating structure at the center and the other end is connected to the edge of the end cap body 3122, a "center-edge" force transmission path is formed, which disperses the driving torque from the mating structure to the entire end cap body 3122, thus avoiding deformation or breakage of the mating structure due to stress concentration around the mating structure.

[0433] Preferably, the reinforcing rib 3123 and the end cap body 3122 are integrally formed. The reinforcing rib 3123 and the end cap body 3122 can be injection molded in one step, without additional assembly processes, without increasing production complexity, and at the same time avoiding the increase in defect rate due to end cap deformation, thus balancing structural performance and production cost. The reinforcing rib 3123 of the upper end cap 312 radially disperses the force on the mating structure, preventing the mating structure from breaking or deforming due to torque, and ensuring the stability of the mating structure after long-term use. The circumferentially spaced reinforcing ribs 3123 make the end cap bear the force evenly, without affecting the concentricity of the filter screen 31, while reducing the weight of the end cap, reducing the driving load, and providing space for airflow inside the end cap body 3122.

[0434] In one embodiment, such as Figure 22 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.

[0435] The lack of a radial limiting structure between the upper end cap 312 and the filter cotton 311 makes it prone to radial displacement and eccentricity relative to the end cap during rotation, resulting in a decrease in the overall concentricity of the filter screen 31. Simultaneously, the gap between the filter cotton 311 and the end cap can cause airflow leakage, affecting purification efficiency. A circumferentially extending positioning ring 31221 is provided on the side of the end cap body 3122 facing the filter cotton 311. The positioning ring 31221 is precisely embedded into the inner or outer ring of the filter cotton 311. Utilizing the radial constraint effect of the positioning ring 31221, the central axis of the filter cotton 311 is forced to completely coincide with the central axis of the end cap body 3122, thereby ensuring that the mating structure between the filter cotton 311 and the center of the end cap is coaxial, locking the overall concentricity benchmark from within the filter screen 31.

[0436] In one embodiment, such as Figure 19 and Figure 20As shown, the reinforcing rib 3123 extends obliquely away from the end cap body 3122 in the direction close to the mating structure. The oblique reinforcing rib 3123 forms an "oblique support skeleton". Compared with straight ribs, its supporting force can be decomposed into radial and axial components. It can effectively disperse the torque transmitted by the mating structure and resist the axial impact force generated during insertion, which greatly improves the torsional and impact resistance of the end cap and avoids the mating structure from shifting due to uneven force.

[0437] Preferably, the reinforcing ribs 3123 are radially inclined around the mating structure and are evenly spaced circumferentially, ensuring that the supporting force of each reinforcing rib 3123 is consistent, maintaining the coaxiality of the mating structure and the end cap body 3122, and locking the concentricity reference of the filter screen 31 from the internal structural level of the end cap. In addition, the inclined design enhances the torsional resistance of the reinforcing ribs 3123, further improving the stability of the mating structure, ensuring smooth force transmission when the filter screen 31 rotates, and the arrangement of the reinforcing ribs 3123 makes the mating structure closer to the drive structure 32212, making it easier for the two to be inserted and mated.

[0438] In one embodiment, such as Figure 2 , Figure 18 , Figure 19 and Figure 20 As shown, the filter screen 31 extends vertically along its axial direction. The top support assembly 32 is located above the filter screen 31. The top support assembly 32 includes a top frame 321, which is fixedly installed inside the housing 10 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 structure 32212 is located below the first transmission structure 3221. The drive structure 32212 passes through the first opening 3211 and cooperates with the filter screen 31. Under the drive of the drive motor 3223, the first transmission structure 3221 rotates synchronously with the filter screen 31 around the rotation center of the filter screen 31.

[0439] Furthermore, the drive structure 32212 located below the first transmission structure 3221 passes through the first opening 3211 and cooperates with the filter screen 31, which shortens the transmission path between the two, reduces transmission error, improves concentricity, and makes the rotation smoother.

[0440] In some embodiments, a rotatable tray 333 is provided below the filter screen. This application decouples the gravity bearing and rotation drive tasks of the filter screen 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 screen 31. The gravity of the filter screen 31 is transferred to the bottom frame 331 through the tray 333, and finally, the outer shell 10 achieves stable bearing. The drive component 322 of the top support component 32 only undertakes the single task of "providing rotational torque". It does not need to work against the gravity of the filter screen. It only needs to output rotational torque to drive the filter screen 31. This avoids the technical faults such as jamming, uneven speed, and inability to rotate caused by gravity load in the traditional bottom drive mode. It can be applied to the drive of large-diameter, high-density high-efficiency filters, solves the problem of insufficient motor torque, improves the smoothness of operation, extends the life of the drive component 322, and reduces energy consumption.

[0441] Meanwhile, the tray 333 adopts a "rotatable setting" structural design, which is connected to the bottom frame 331 through ball bearings 334 or sliding bearings, so that the tray 333 can rotate synchronously with the filter screen 31, which can realize the function of gravity bearing without hindering the rotation of the filter screen, and at the same time, it does not generate rotational resistance, realizing the coordinated work of the tray 333 in bearing and following.

[0442] The filter module 30 adopts a modular design consisting of a top support component 32, a bottom support component 33, and a filter screen 31. The top support component 32 integrates the driving function and the function of limiting the upper airflow duct 212, while the bottom support component 33 integrates the load-bearing function and the function of limiting the lower airflow duct. The filter screen 31 is placed between the two components. This structure makes the functional boundaries of each component clear. During assembly, the two main components can be fixed in the housing 10 first, and then the filter screen 31 can be installed, simplifying the assembly process. During maintenance, any module can be disassembled and assembled individually, effectively simplifying the assembly process and significantly reducing the difficulty of maintenance.

[0443] Furthermore, the top-driven layout provides more space below the bottom frame 331 inside the shell 10, enabling structural avoidance.

[0444] In summary, this application overturns the traditional layout where the filter 31 is driven by the lower tray 333. Instead, it integrates the drive assembly 322 into the top frame 321, so that the weight of the filter 31 is supported by the lower tray 333. The drive assembly 322 does not need to do 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.

[0445] In one embodiment, such as Figure 22 , Figure 23 and Figure 25As shown, the first transmission structure 3221 includes: a connecting rib 32214, a transmission body 32213 formed in a ring shape, and a first mounting part 32211. The first mounting part 32211 is located at the center of the transmission body 32213, and the driving 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.

[0446] If the first transmission structure 3221 adopts a solid plate design, it will block the top air outlet and increase the structural weight. At the same time, the stress distribution of the solid structure is uneven, and it is prone to deformation under high torque conditions. In addition, the solid structure makes it difficult to balance the coaxial installation of the drive structure 32212 and the transmission efficiency. Designing the transmission body 32213 as a ring shape to replace the traditional solid structure not only significantly reduces the overall weight of the transmission structure and reduces the load and energy consumption of the drive motor 3223, but also leaves a flow channel for the top airflow, avoiding the increase in airflow resistance caused by blocking the upper air outlet 101, and is compatible with the upper and lower dual air outlet layout of the purifier.

[0447] A first mounting part 32211 is provided at the center of the transmission body 32213, and the drive structure 32212 is precisely positioned below the first mounting part 32211 to ensure that the axis of the drive structure 32212 is completely coincident with the rotation axis of the transmission body 32213; at the same time, the connecting ribs 32214 extend radially and are evenly distributed circumferentially to rigidly connect the first mounting part 32211 and the transmission body 32213 to form a stable support structure, ensuring that the first mounting part 32211 has no radial offset during power transmission and is precisely aligned with the mating structure of the filter screen 31.

[0448] The display module 70 of this embodiment will be described below with reference to the accompanying drawings.

[0449] In some embodiments, the air purifier further includes a display module 70 disposed on the top of the housing 10. The display module 70 includes a display bracket 71, an indicator light 74 mounted on the display bracket 71, a lampshade, and a lamp holder 73 for supporting the lampshade 72. The lampshade 72 is made of crystal or crystal-like translucent material. The display bracket 71 passes at least partially through the lampshade 72 and is detachably connected to the lamp holder 73 to limit the lampshade 72 between the display bracket 71 and the lamp holder 73. The indicator light 74 is configured to emit light, and the light can illuminate the lampshade 72 and be refracted and / or scattered by the lampshade 72.

[0450] In the above embodiments, the display module 70 of the air purifier uses a lampshade 72 made of crystal or crystal-like translucent material. This allows the light emitted by the display lamp 74 to be refracted and / or scattered in all directions after hitting the lampshade 72, creating a soft, three-dimensional halo effect. This makes the overall appearance more refined and high-end, improving the product's visual quality and user experience. It also effectively prevents the light from the display lamp 74 from shining directly out, causing glare and user interference. Furthermore, this application uses a clamping design between the display bracket 71 and the lamp holder 73 to install the lampshade 72. This not only ensures a secure and stable installation of the lampshade 72 but also avoids the risks of damaging the integrity of the lampshade 72 and causing stress cracks associated with fixing the lampshade 72 with screws or similar methods. It also makes the installation and removal of the lampshade 72 easier, facilitating later cleaning or replacement and reducing maintenance costs.

[0451] Specifically, in this embodiment, the lampshade 72 is made of crystal and is a spherical or hemispherical crystal ball. Preferably, the lampshade 72 in this embodiment is hemispherical to facilitate its fit with the plate-shaped components such as the display panel 79, display panel 76, and decorative panel 75 above it. The lamp holder 73 is a bowl-shaped component that matches the shape of the lampshade 72. A hollow channel running through the center of the lampshade 72 is provided, and the lower end of the display bracket 71 passes through the hollow channel and connects to the lamp holder 73. The display bracket 71 and the lamp holder 73 are connected by screws or snap-fit. Preferably, to ensure the stability of the connection between the display bracket 71, the lamp holder 73, and the lampshade 72, the display bracket 71 and the lamp holder 73 are connected by screws.

[0452] In some embodiments, such as Figure 13 , Figure 16 and Figure 17 As shown, the display bracket 71 includes a support portion 711 and a connecting portion 712 located below the support portion 711; the display lamp 74 is mounted above the support portion 711, and the support portion 711 is provided with a light-transmitting opening 7110 that guides the light of the display lamp 74 to illuminate the lamp cover 72; the lamp cover 72 has a hollow channel in the middle, and the connecting portion 712 passes through the hollow channel and is screwed to the lamp holder 73.

[0453] In the above embodiments, the display bracket 71, through the design of the support part 711 and the connecting part 712, can not only install the display lamp 74, but also connect with the lamp holder 73, realizing the assembly and fixation of the lamp holder 73, display bracket 71, and lamp cover 72, serving multiple purposes in one device. By mounting the display panel 79 above the support part 711, the support part 711 can form a physical isolation between the display panel 79 and the lamp cover 72, avoiding the risk of heat accumulation or short circuit. Furthermore, the light-transmitting opening 7110 on the support part 711 can guide the light to concentrate on the lamp cover 72, avoiding scattering loss. The cooperation between the connecting part 712 and the hollow channel of the lamp cover 72 can effectively ensure the coaxiality of the lamp cover 72, display bracket 71, and lamp holder 73, preventing the lamp cover 72 from shifting and affecting the light efficiency. In addition, the connecting part 712 and the lamp holder 73 are fixed by screw connection, which is reliable and stable, effectively ensuring the stability of the product during transportation and use.

[0454] Specifically, the support portion 711 is an annular plate structure, and the connecting portion 712 is a cylindrical structure. The upper circumferential edge of the cylindrical connecting portion 712 is connected to the inner ring edge of the annular support portion 711. There are multiple sets of indicator lights 74, which are arranged at intervals along the circumference of the support portion 711, and multiple sets of light-transmitting openings 7110 are provided accordingly.

[0455] Furthermore, such as Figure 13 , Figure 14 , Figure 17 As shown, the lower end of the connecting part 712 is provided with a bolt post, and the lamp holder 73 is provided with a connecting hole. A screw is connected between the connecting hole and the bolt post. Preferably, at least two sets of bolt posts are symmetrically provided on the connecting part 712 to further improve the stability of the connection between the lamp holder 73 and the display bracket 71.

[0456] In some embodiments, one of the mating parts of the display bracket 71 and the lamp holder 73 is provided with a positioning slot 713 and the other is provided with a positioning rib 731; the positioning slot 713 and the positioning rib 731 are inserted and mated to limit the display bracket 71 and the lamp holder 73 in the circumferential direction.

[0457] In the above embodiments, the cooperation of the positioning rib 731 and the positioning slot 713 can not only limit the display bracket 71 and the lamp holder 73 in the circumferential direction, effectively preventing the display bracket 71 and the lamp holder 73 from rotating relative to each other during use or assembly, but also play a role in rapid positioning, so that the screw connection structure on the display bracket 71 and the lamp holder 73 can be quickly aligned, simplifying the assembly alignment process and improving production efficiency.

[0458] Specifically, the display bracket 71 is provided with a positioning slot 713, the lamp holder 73 is provided with a positioning rib 731, the bottom edge of the connecting part 712 of the display bracket 71 is provided with a notch, the notch forms the positioning slot 713, and the bottom inner peripheral wall of the lamp holder 73 is provided with a strip rib, the strip rib forms the positioning rib 731.

[0459] Preferably, there are at least two sets of positioning ribs 731 and positioning slots 713, which are arranged at intervals.

[0460] In some embodiments, such as Figure 14 and Figure 15 As shown, one of the mating parts of the lampshade 72 and the lamp holder 73 is provided with a limiting groove 732 and the other is provided with a limiting rib 721; the limiting groove 732 and the limiting rib 721 are in concave-convex fit to realize the limiting of the lampshade 72 and the lamp holder 73 in the circumferential direction.

[0461] In the above embodiment, the limiting groove 732 and the limiting rib 721 cooperate to limit the lamp cover 72 and the lamp holder 73 in the circumferential direction. The limiting groove 732 and the limiting rib 721, together with the positioning rib 731 and the positioning slot 713, form a double anti-rotation mechanism to ensure that the lamp cover 72 can maintain high stability even in a vibration environment.

[0462] In some embodiments, the display module 70 further includes a display panel 79 and a decorative panel 75. The display panel 79 is mounted on the display bracket 71, and the display lamp 74 is disposed below the display panel 79 and corresponds to the lamp cover 72. The decorative panel 75 has a mounting position in the middle for mounting the display panel 79, and the display panel 79 is detachably mounted in the mounting position. The decorative panel 75 and the display bracket 71 are engaged and fixed by a snap-fit ​​structure.

[0463] In the above embodiment, by integrating the mounting position of the decorative panel 75 and installing the display panel 79 in the mounting position, the overall structure is relatively compact. The decorative panel 75 and the display bracket 71 are fixed by rotating and snapping together through a swivel structure, which can realize quick assembly and disassembly of the decorative panel 75 and the display bracket 71, and facilitates later maintenance.

[0464] Specifically, the display panel 79 is reliably fixed to the mounting position of the decorative panel 75 using four stainless steel self-tapping screws; the decorative panel 75 and the display bracket 71 are integrated with four sets of symmetrically distributed screw structures, and the decorative panel 75 and the display bracket 71 are precisely matched through the four sets of screw structures to achieve a 360° tightening connection.

[0465] In some embodiments, such as Figure 4 , Figure 13 and Figure 17As shown, the decorative panel 75 is fastened to the display bracket 71; the snap fastener structure includes a snap fastener 751 and a slot 714, one of which is disposed on the decorative panel 75 and the other on the display bracket 71; one of the snap fastener 751 and the slot 714 is provided with a locking protrusion 752 and the other with a locking groove 715; when the decorative panel 75 and the display bracket 71 are rotated and engaged to the set assembly position by the snap fastener 751 and the slot 714, the locking protrusion 752 and the locking groove 715 engage.

[0466] In the above embodiments, the snap fastener structure, by adopting a snap fastener 751 and a groove 714, has a simple structure and is easy to operate. Furthermore, the locking protrusion 752 and locking groove 715 correspondingly provided on the snap fastener 751 and the groove 714 can effectively prevent the snap fastener 751 from falling out of the groove 714 in the opposite direction, further improving the reliability of the connection and ensuring that the snap fastener 751 will not easily loosen even in a vibration environment. In addition, the locking protrusion 752 and locking groove 715 can provide clear tactile and audible feedback when the decorative panel 75 is engaged, resulting in a better assembly experience.

[0467] Specifically, the decorative panel 75 includes a panel body and a fastening part disposed below the panel body. The fastening part is cylindrical, and the outer periphery of the support part 711 is bent upward to form a folded edge. That is, the outer periphery of the support part 711 is bent upward to form a folded edge, and the fastening part extends into the folded edge. A swivel 751 is provided on the outer peripheral wall of the fastening part, and a swivel groove 714 is provided on the inner periphery of the folded edge. A portion of the swivel 751 is recessed inward to form a locking groove 715, and a locking protrusion 752 is fixedly disposed in the swivel groove 714. During assembly, the decorative panel 75 is fastened above the display bracket 71 and covers the display panel 79, the display bracket 71, and the lampshade 72. The fastening part extends into the folded edge above the display bracket 71, and then the decorative panel 75 is rotated along the set installation direction until the locking groove 715 engages with the locking protrusion 752.

[0468] In some embodiments, the display module 70 further includes a display panel 76 mounted above the decorative panel 75 and at least covering the display panel 79.

[0469] In the above embodiments, by providing a display panel 76 on the decorative panel 75, the gap between the display panel 79 and the decorative panel 75 can be hidden, resulting in a clean interface. Furthermore, the display panel 76 can effectively prevent dust from entering the display module 70 and extend the service life of the display module 70.

[0470] Specifically, the back of the display panel 76 is attached to the decorative panel 75 by a high-adhesion adhesive.

[0471] In some embodiments, the housing 10 has an air inlet 100 in the middle, an upper air outlet 101 and a lower air outlet 102 at the top and bottom respectively, and the display module 70 is located at the upper air outlet 101; the top of the housing 10 is open to form the upper air outlet 101, and an air outlet grille 12 is installed inside the upper air outlet 101. The air outlet grille 12 is annular, and an avoidance opening is formed in the middle of the air outlet grille 12 to allow the display module 70 to be exposed.

[0472] In the above embodiment, by setting the air outlet grille 12 as an annular shape, the opening in the middle of the annular air outlet grille 12 serves as a clearance opening for the display module 70 to be exposed, so that the air outlet and display functions do not interfere with each other, while the clearance opening can also meet the heat dissipation requirements of the display module 70.

[0473] In some embodiments, the air purifier further includes a negative ion generator 214, which is mounted on the second bracket 213. The negative ion generator 214 can adsorb any residual particulate matter in the air passing through the upper air duct 212 by generating negative ions, thereby further purifying the air.

[0474] In some embodiments, the air purifier further includes a filter self-cleaning assembly 40, which is disposed on one side of the filter 31 and is used to clean the filter 31.

[0475] The air purifier proposed in this application mainly consists of a shell 10, an air inlet grille 11, a filter module 30, an ultraviolet sterilization module 60, a filter self-cleaning component 40, an upper fan assembly 21, and a lower fan assembly 22. This purifier employs a dual centrifugal fan system, with the two fans respectively placed in the upper air duct 212 and the lower air duct. An annular air inlet 100 is provided on the air inlet grille 11 of the shell 10, forming a purification method of central air intake and top and bottom air exhaust. After purification, part of the air is blown upwards by the upper fan assembly 21, and the other part is blown downwards by the lower fan assembly 22 and discharged from all sides, ultimately forming the following configuration: Figure 5 The diagram shows a "surrounding" airflow path. Compared to traditional top and bottom air intake and center air exhaust, this solution avoids the problem of dust or foreign objects being easily drawn in when air is drawn in from the ground, leading to filter clogging, performance degradation, and shortened lifespan. Furthermore, common center air exhaust designs tend to create a noticeable direct airflow sensation, which can easily disturb users in quiet environments such as sleeping or working. The surrounding airflow created by this solution, with center air intake and top and bottom air exhaust, effectively eliminates the discomfort of direct airflow, allowing users to enjoy uniformly flowing clean air without feeling any discomfort while achieving purification, thus enhancing the user experience.

[0476] Furthermore, a filter module 30 integrating a HEPA high-efficiency particulate air filter and a composite activated carbon filter is installed at the air inlet 100. The composite activated carbon filter is placed inside the HEPA filter, together forming a cylindrical, independently replaceable filter unit. This design allows users to easily replace the failed filter section individually, avoiding the need for complete replacement of traditional integrated composite filters due to partial failure, thereby reducing maintenance costs and resource waste. At the same time, the central air intake and top-bottom air outlet layout only requires a single filter in the middle of the unit, making filter replacement and cleaning more convenient. In contrast, if a top-bottom air intake and central air outlet design were used, two sets of pre-filters would need to be installed at the top and bottom air inlets, increasing maintenance complexity and costs.

[0477] Furthermore, the central air intake and top-to-bottom air outlet structure helps to expand the functions of the air purifier. To avoid filter clogging and bacterial accumulation due to centralized purification at the air inlet 100, which would affect its service life, this embodiment preferably employs filter self-cleaning technology and an ultraviolet sterilization module 60 to centrally maintain the central filter, achieving both self-cleaning and sterilization functions. In contrast, the top-to-bottom air intake and central air outlet structure, with its dispersed filter element arrangement at the air inlet 100, makes it difficult to achieve the aforementioned centralized maintenance function.

[0478] This embodiment utilizes a top support assembly 32 above the filter screen 31 and a bottom support assembly 33 below it to facilitate centralized maintenance of the air inlet filter screen 100. The two support assemblies are connected by two intermediate support frames 34, which bear the main weight of the entire unit. The top support assembly 32 is driven by a stepper motor to rotate the filter screen 31, which is fixed and pre-tightened to it; the bottom support assembly 33 serves as a base, providing a platform for the filter screen 31 to rotate freely and support manual lifting. The user can control the filter screen 31 to rise by moving the lever 3323, fixing it to the top support assembly 32 for rotation, and move the lever 3323 in the opposite direction to lower the filter screen 31 for easy removal.

[0479] Furthermore, the filter self-cleaning function is achieved by the filter self-cleaning component 40, which includes a vacuum base 41 and a vacuum assembly 42. The vacuum base 41 integrates a vacuum motor, a ventilation pipe, and a dust collection box, while the vacuum assembly 42 is equipped with a segmented, retractable brush head. The vacuum base 41 is fixed to the bottom support assembly 33 by clips and screws, and the upper and lower ends of the vacuum assembly 42 are connected to the top support assembly 32 and the bottom support assembly 33 by screws, respectively. When the air purifier enters the self-cleaning mode, under the negative pressure provided by the vacuum motor, the vacuum assembly 42 and its segmented, retractable brush head can vacuum the outer surface of the rotating filter 31 layer by layer, and the dust is collected in the dust collection box for convenient centralized disposal by the user. In the sterilization mode, the ultraviolet sterilization module 60, which is connected between the top support assembly 32 and the bottom support assembly 33 by screws, can irradiate the rotating filter 360°, effectively inhibiting bacterial growth, reducing the risk of microbial contamination, improving purification efficiency, and reducing secondary pollution.

[0480] Furthermore, this embodiment also includes a four-in-one sensor on the upper fan assembly 21 and a formaldehyde sensor 14 on the housing 10. The formaldehyde sensor 14 and the four-in-one sensor work together to monitor air quality in real time, enabling the purifier to dynamically adjust the purification mode according to different environments, thereby improving purification efficiency. Preferably, a cover plate 13 is provided on the back of the housing 10, and the formaldehyde sensor 14 is integrated on the cover plate 13. The top of the cover plate 13 is limited by the ribs on the side of the upper air duct 212, and the bottom of the cover plate 13 is fixed to the bottom of the filter top support assembly 32 by buckles and screws.

[0481] Furthermore, the air purifier also includes a support base 80, which supports the entire unit. The lower fan assembly 22 is connected to the vacuum base 41 via screws and clips, and fixed above the support base 80. The support base 80 is equipped with casters at the bottom, facilitating movement of the purifier to different locations. The first bracket 222 is fixed to the base with screws, and a bottom light assembly 90 is installed at its bottom via clips. The bottom light assembly 90 includes a light strip bracket 91 and a bottom ambient light strip 92. The bottom ambient light strip is embedded in the groove of the light strip bracket 91 and adopts an adjustable warm light design to avoid glare at night and optimize the user experience. The first fan 221 is installed inside the first bracket 222, and three flow openings 2220 are opened around its perimeter. Each flow opening 2220 has a specific slot for installing the deodorization module 50. The deodorization module 50 consists of three plasma generators 51, three metal mesh covers 52, and three ozone reduction meshes 53. It can efficiently decompose and neutralize TVOCs, odors, and other organic pollutants in the air passing through the lower air outlet 102. The plasma generators 51 produce high-density plasma, which catalyzes the degradation of harmful gases. The metal mesh covers 52 are located between the ozone reduction meshes 53 and the plasma generators 51, and are grounded to prevent plasma leakage. The outermost ozone reduction meshes 53 prevent excessive ozone from escaping due to glow discharge.

[0482] Furthermore, the upper fan assembly 21 is fixed above the top support assembly 32 with screws. The upper fan assembly 21 includes an upper air duct 212, a second bracket 213, and a second fan 211. The second fan 211 is installed below the second bracket 213, and a display module 70 is installed above it. The display module 70 includes an indicator light 74, a lampshade 72, a lamp holder 73, an air quality light 77, and a lamp stand 78. The air quality light 77 is embedded in the groove of the lamp stand 78 and uses a ring-shaped LED matrix to dynamically display key indicators such as PM2.5 and formaldehyde in real time, allowing users to intuitively understand air quality and purification effects without the need for a screen or APP. A crystal sphere is mounted on the lamp holder 73, and a color display screen is integrated on its top for easy user operation of the entire unit. The crystal material forms a soft halo under the light, enhancing the product's visual style. In another embodiment, a liftable crystal sphere design can be adopted, which automatically rises when the unit is turned on and automatically lowers when it is turned off, enhancing aesthetics while giving users a sense of ritual in intelligent interaction.

[0483] Furthermore, to ensure the deodorization effect, the airflow through the deodorization module 50 needs to reach an appropriate air volume. When the purifier is in deodorization mode, the air volume at the lower air outlet 102 can be controlled by the first fan 221 to maintain an ideal air volume. At this time, the second fan 211 can still adjust the air volume at the upper air outlet 101 to continue purifying the air, thereby maximizing the purification performance and working efficiency of the whole machine in deodorization mode. When switching to normal purification mode, the deodorization module 50 can be turned off, and the speed of the two fans can be adjusted separately to achieve rapid purification.

[0484] The air purifier provided in this application expands its adaptability to multiple scenarios by integrating odor removal functionality. Based on the airflow path, it innovatively integrates a plasma generator 51, a metal mesh cover 52, and an ozone reduction mesh 53 to form an odor removal module 50. This module dynamically switches to odor removal mode according to environmental needs and works in conjunction with the first fan, automatically adjusting the airflow to optimal levels for efficient decomposition of TVOCs and odors. Simultaneously, the second fan maintains basic purification efficiency, achieving efficient and safe odor removal and significantly improving the device's applicability and user experience in odor-prone environments. While ensuring the air purifier's performance, this application expands its functionality and purification modes, enhancing its reliability and adaptability in various application scenarios to meet diverse user needs and improve the user experience.

[0485] The following is in conjunction with the appendix Figure 9 , Figures 44 to 56 The specific structure and working principle of the plasma generator 51 in this embodiment will be introduced.

[0486] In some embodiments, the electrode structure 512 includes an insulating tube 5122, an inner electrode 5121 passing through the insulating tube 5122, and an outer electrode 5123 spirally wound around the insulating tube 5122; an elastic buffer 515 is detachably mounted on the mounting bracket 511, and an electrical limit groove 5151 is formed on the elastic buffer 515, with both ends of the electrode structure 512 respectively limited and fixed in the electrical limit groove 5151.

[0487] In the above embodiment, the added elastic buffer 515 and the electrical limit groove 5151 formed on the elastic buffer 515 support and position the electrode structure 512. Utilizing the high elasticity of the elastic buffer 515, the electrode structure 512 can be held in place by the elastic buffer 515, thus achieving a fixed position. It also provides good shock absorption for the electrode structure 512. When the device is subjected to transportation vibrations or mechanical impacts during operation, the elastic buffer 515 can effectively absorb and attenuate energy, significantly reducing the risk of cracks or breakage of the electrode structure 512 (especially brittle ceramic insulating tubes) due to stress concentration, thereby improving product reliability and service life. Furthermore, the elastic buffer 515 can be detachably installed onto the mounting bracket 511, facilitating manufacturing and subsequent maintenance and replacement. In addition, the electrical limit groove 5151 precisely limits and fixes both ends of the electrode structure 512, ensuring the stability of the electrode structure position during use of the plasma generator 51 and preventing discharge instability or failure due to loosening.

[0488] Based on the above embodiments, as a further limited embodiment, the elastic buffer 515 can be a silicone part, a rubber part, a TPE part, a polyurethane part, or it can also be a composite structure, such as a spring assembly or an airbag part. This embodiment does not limit this.

[0489] In some embodiments, the mounting bracket 511 includes two opposing frames, and two elastic buffers 515 are provided; the two elastic buffers 515 are respectively snapped and limited on the two frames, and the two ends of the electrode structure 512 are respectively limited in the electrical limit grooves 5151 of the two elastic buffers 515.

[0490] In the above embodiment, by mounting the electrode structure 512 on two opposite sides of the mounting bracket 511 and setting elastic buffers 515 on the two sides respectively, the electrode structure 512 can be supported and fixed from both ends at the same time, forming a stable "two-point support" structure, which effectively prevents the electrode from warping or shaking in the length direction, ensures its accurate position in the airflow channel, and ensures uniform and stable discharge effect.

[0491] Based on the above embodiments, as a further defined embodiment, the frame includes an upper frame and a lower frame spaced apart vertically, and the frame is a vertically arranged plate-like structure. An elastic buffer 515 is fixedly disposed on one side of the plate-like frame.

[0492] In some embodiments, the mounting bracket 511 includes a mounting bracket body 5111 and an upper cover 5112 and a lower cover 5113 disposed at the upper and lower ends of the mounting bracket body 5111. The mounting bracket body 5111 is annular, with an electrode mounting area formed in the middle of the mounting bracket body 5111. The electrode structure 512 is mounted on the mounting bracket body 5111. The mounting bracket body 5111 includes an upper frame and a lower frame, and two side frames connected to the upper and lower frames. The upper end of the electrode structure 512 is mounted on the upper frame, and the lower end is mounted on the lower frame. The upper cover 5112 and the lower cover 5113 of the mounting bracket 511 are fitted onto the upper and lower ends of the mounting bracket body 5111, and at least cover the electrode structure 512 and the elastic buffer member 515.

[0493] By installing upper covers 5112 and lower covers 5113 at the top and bottom of the mounting frame body 5111 respectively, the electrode structure 512, elastic buffer 515, pressure plate 516, high-voltage connection plate 514, and low-voltage connection plate 513 are completely enclosed, effectively preventing moisture, oil, dust, etc. from entering the interior, protecting the electrode structure 512 from corrosion, extending the service life of the equipment, and preventing accidental contact with live parts, thus improving the safety protection level of the equipment. They also provide cushioning protection, preventing the electrode structure 512, elastic buffer 515, pressure plate 516, high-voltage connection plate 514, and low-voltage connection plate 513 from loosening or being damaged by collisions with external components due to transportation bumps. Furthermore, the upper covers 5112 and lower covers 5113 fit tightly with the mounting frame body 5111, forming an integral structure that allows for the concealment of internal components, resulting in a simple and aesthetically pleasing appearance and enhancing the overall quality of the product. Furthermore, the upper cover 5112 and lower cover 5113 are designed with a clamp for easy installation and removal. When it is necessary to inspect or replace components such as electrode structure 512 and elastic buffer 515, it is only necessary to remove the upper cover 5112 or the lower cover 5113 without disassembling the entire mounting bracket 511, which greatly simplifies the maintenance process.

[0494] In some embodiments, a first limiting rib 51113 is provided on the frame, and the first limiting rib 51113 extends along the length direction of the frame; the elastic buffer member 515 is provided with a first mating groove 5153 that cooperates with the first limiting rib 51113; a second limiting rib 51114 is provided on the frame, and the second limiting rib 51114 extends along the width direction of the frame; the elastic buffer member 515 is provided with a second mating groove 5154 that cooperates with the second limiting rib 51114.

[0495] In the above embodiment, the first limiting rib 51113 arranged along the length direction of the frame and the second limiting rib 51114 arranged along the width direction of the frame, under the combined action of the first limiting rib 51113 and the second limiting rib 51114, limit the elastic buffer 515 from multiple dimensions, improve the stability of the elastic buffer 515 structure, ensure that the installation position of the elastic buffer 515 on the mounting bracket 511 is accurate, prevent the elastic buffer 515 from shifting or rotating during installation, play a role in precise positioning and error prevention, and thus ensure the positioning consistency of all electrodes. In addition, the groove and rib mating structure, while providing positioning, also increases the contact area and friction, making the connection between the elastic buffer 515 and the frame more firm, avoiding the possible loosening of the elastic buffer 515 and the mounting bracket 511 under long-term vibration environment, and enhancing the reliability of the connection between the elastic buffer 515 and the mounting bracket 511.

[0496] Based on the above embodiments, as a further defined embodiment, there are multiple second limiting ribs 51114, which are spaced apart along the length direction of the first limiting rib 51113. The first limiting rib 51113 is a long strip of rib arranged horizontally on the frame, and the second limiting ribs 51114 are ribs arranged vertically on the frame. The first limiting ribs 51113 and the second limiting ribs 51114 form a cross rib. The elastic buffer member 515 is a long strip structure that matches the length of the frame. The elastic buffer member 515 has a first mating groove 5153 and a second mating groove 5154 on the side near the frame.

[0497] In some embodiments, the elastic buffer 515 is a rubber strip, and the electrical limit groove 5151 is a U-shaped groove formed on one side of the rubber strip.

[0498] In the above embodiments, the elastic buffer 515 adopts a rubber strip structure, which is simple in structure and easy to install. The electrical limit groove 5151 adopts a U-shaped groove, which allows the electrode structure 512 to be easily inserted into the electrical limit groove 5151 from the side, making the assembly operation simple and quick. At the same time, the U-shaped structure has a certain degree of tolerance for the diameter of the electrode, and with the elasticity of the rubber strip, it can adapt to small dimensional tolerances to ensure the reliability of clamping. In addition, the U-shaped groove can wrap around the electrode from three directions. When subjected to impacts or vibrations from different directions, it can provide effective buffer protection through the deformation of the rubber strip, resulting in better cushioning and shock absorption.

[0499] Based on the above embodiments, as a further defined embodiment, the distance between the two opposite walls of the U-shaped groove is less than the size of the corresponding mounting part of the electrode structure 512, so as to achieve the limiting and fixing of the electrode structure 512 by means of interference fit.

[0500] In some embodiments, the first limiting rib 51113 is provided with a relief recess at the position corresponding to the electric limit groove 5151 of the elastic buffer 515. This design can play a role in relief and limiting when the elastic buffer 515 is squeezed by the pressure plate 516, thereby further improving the stability of the position of the electrode structure 512.

[0501] In some embodiments, the plasma generating device 51 further includes a pressure plate 516, which is detachably connected to the mounting frame 511 and presses the elastic buffer 515 tightly onto the mounting frame 511.

[0502] In the above embodiment, the pressure plate 516 ensures that the elastic buffer 515 is always subjected to a clamping force close to the mounting bracket 511, making it tightly fitted to the mounting bracket 511. This prevents the elastic buffer 515 from bouncing off or loosening from its mounting position due to its own elastic recovery or external vibration, further improving the reliability of the fixation. Furthermore, the pressure plate 516 and the mounting bracket 511 are detachably connected, facilitating subsequent disassembly and maintenance.

[0503] Based on the above embodiments, as a further defined embodiment, the elastic buffer 515 is located between the pressure plate 516 and the mounting bracket 511, and the pressure plate 516 can be connected to the mounting bracket 511 by screws or snap-fit.

[0504] Preferably, in this embodiment, the pressure plate 516 and the mounting bracket 511 are snapped together, so that the pressure plate 516 can be disassembled and assembled without the aid of external tools.

[0505] In some specific embodiments, the pressure plate 516 is provided with a buckle 5161, the mounting bracket 511 is provided with a slot 51111, and the elastic buffer 515 is provided with a through hole 5152. The buckle 5161 passes through the through hole 5152 and connects with the slot 51111.

[0506] In the above embodiment, the pressure plate 516 is connected and engaged with the mounting bracket 511 through the through hole 5152 of the elastic buffer 515 via a snap fastener 5161. This not only enables the assembly of the pressure plate 516, the elastic buffer 515, and the mounting bracket 511 into a single unit, but also ensures that the snap fastener 5161 of the pressure plate 516, after fastening the mounting bracket 511, exerts a squeezing effect on the elastic buffer 515. This causes the elastic buffer 515 to deform under pressure and firmly press against the electrode structure 512, thereby indirectly and effectively pressing and fixing the electrode structure 512. Furthermore, by using the snap fastener 5161 as the connection structure between the pressure plate 516 and the mounting bracket 511, the use of tools such as screwdrivers is eliminated, significantly improving assembly efficiency and making it very suitable for mass production. The snap fastener 5161 also has a certain holding force, effectively ensuring that the pressure plate 516 does not loosen under vibration.

[0507] Based on the above embodiments, as a further defined embodiment, the pressure plate 516 is provided with a plurality of buckles 5161 spaced apart along its length, and the fixing frame is provided with a plurality of corresponding slots 51111. The plurality of slots 51111 and the plurality of buckles 5161 are engaged in a one-to-one manner, further improving the fixing effect of the pressure plate 516. There are two pressure plates 516, and the two pressure plates 516 are respectively fixed at the upper and lower ends of the electrode structure 512.

[0508] In some embodiments, the electrode structure 512 has multiple sets, and the multiple sets of electrode structures 512 are spaced apart along the length direction of the mounting frame 511. The elastic buffer 515 is provided with multiple sets of electrical limit grooves 5151 corresponding to the multiple sets of electrode structures 512.

[0509] In the above embodiments, the parallel arrangement of multiple electrode structures 512 increases the total area of ​​glow discharge, thereby significantly improving air purification efficiency and processing capacity per unit time, meeting the needs of larger spaces or higher cleanliness levels. Furthermore, the spaced arrangement of multiple electrode structures 512 not only facilitates electrode installation but also promotes smooth airflow through the electrode area, reducing wind resistance and improving purification efficiency. Moreover, by creating multiple electrical limit slots 5151 on a single adhesive strip, multiple electrodes can be installed in parallel and at equal intervals, achieving a modular design for the multiple electrode structures 512. This ensures the neat and uniform arrangement and consistent spacing of the multiple electrode structures 512, promoting uniform electric field distribution, optimizing discharge performance, and resulting in a compact structure.

[0510] Based on the above embodiments, as a further defined embodiment, multiple sets of electrical limit grooves 5151 are formed on the same side of the elastic buffer 515, facilitating the installation of multiple sets of electrode structures 512 from one side. Specifically, the openings of the multiple sets of electrical limit grooves 5151 all face the same side. In this embodiment, the electrode structure 512 is firmly fixed to the mounting bracket 511 using a pressure plate 516 and adhesive strips, thus providing both fixing and shock absorption functions.

[0511] Based on the above embodiments, as a further defined embodiment, the overall module is stably fixed and the structure is compact by pressing the rubber strip and the multiple sets of electrode structures 512 installed on it with the pressure plate 516 in one go.

[0512] Because the insulating tube 5122 needs to be resistant to breakdown and electrochemical corrosion, ceramic is the best choice. Therefore, in this embodiment, the insulating tube 5122 of the electrode structure 512 is made of ceramic. However, ceramic is relatively brittle and prone to cracking. Furthermore, ceramic products are more susceptible to cracking during transportation and drops from heights, rendering the electrode unusable due to arcing. Therefore, this application addresses the problem of ceramic cracking during transportation and drops by providing a U-shaped electrical limit groove 5151 on the elastic buffer member 515. The elastic buffer member 515 is manufactured using a high-elasticity silicone material through precision injection molding. Its surface has a U-shaped groove structure to accommodate the dimensional tolerances of the electrode structure 512, serving to mount the electrode structure 512 and providing a limiting effect. The elastic buffer member 515 is fixed to the mounting bracket 511, serving as a support and buffer structure for the electrode structure. The pressure plate 516 is equipped with a buckle 5161, which cooperates with the slot 51111 on the mounting bracket 511. The electrode structure 512 is pressed and fixed on the mounting bracket 511 through the buckle 5161 connection method, ensuring that it will not loosen due to vibration during operation. At the same time, the elastic buffer 515 can effectively absorb external impacts. It not only serves as a supporting skeleton for the electrode structure 512, but also effectively absorbs external mechanical impacts due to its excellent elastic buffer characteristics, attenuating the impact energy and greatly reducing the risk of micro-displacement of the electrode caused by thermal expansion and contraction or external disturbances. It has both fixing and shock absorption functions, improving the stability, reliability and service life of the module.

[0513] Based on the above embodiments, as a further defined embodiment, multiple sets of electrode structures 512 are arranged in a single row with equal spacing; the diameter of the outer electrode 5123 is set as d1, and the spacing between two adjacent sets of electrode structures 512 is set as d2, wherein 1.5d1≤d2≤5d1; the number of electrode structures 512 is 8 to 14 sets.

[0514] By arranging the electrode structure 512 in a single row, the problem of airflow obstruction caused by multiple rows can be avoided. Furthermore, the design of equidistant arrays of multiple electrode structures 512 ensures uniform discharge throughout the entire electrode safety zone. In addition, by setting the spacing of the electrode structures 512 within the aforementioned range, the problem of arcing caused by two electrode structures 512 being too close can be effectively avoided. Simultaneously, it also prevents two electrode structures 512 from being too far apart, resulting in a small effective discharge area and some airflow passing directly through without passing the plasma region, leading to low purification efficiency.

[0515] Preferably, the number of electrode structures 512 is 12 groups.

[0516] In some embodiments, the electrode structure 512 includes a conductive sleeve 5124, which is fixedly disposed outside the insulating tube 5122. The conductive sleeve 5124 is fixed and covers at least one end of the outer electrode 5123, and the outer electrode 5123 is connected to the power source through the conductive sleeve 5124.

[0517] In the above embodiment, the conductive sleeve 5124 is made of conductive material. Since the outer electrode 5123 wrapped around the insulating tube 5122 is relatively thin, it is very difficult and unreliable to connect it directly to the power line. The conductive sleeve 5124 covering the end of the outer electrode 5123 provides a large-area, stable and reliable electrical connection point, which completely solves the problem of messy connection and unstable conduction at the tail of the existing outer electrode 5123. In addition, the conductive sleeve 5124 can also reinforce and protect the inner insulating tube 5122 and the end of the outer electrode 5123.

[0518] Furthermore, in the electrode structure 512 provided in this embodiment, the original extended portion of the outer electrode 5123 is removed. Instead of connecting the extended portion of the outer electrode 5123 to the metal component by solder, the electrical connection is achieved by covering the end of the outer electrode 5123 with a conductive sleeve 5124. This makes the entire electrode structure 512 look neater and reduces phenomena such as poor electrode conductivity. In addition, there is no need to comb the tail of the outer electrode 5123 during connection, which effectively solves the problem of messy connection at the tail of the outer electrode 5123.

[0519] In some embodiments, the plasma generating device 51 further includes a low-voltage connecting plate 513, which is fixedly connected to the conductive sleeve 5124 and forms an electrical connection. The outer electrode 5123 forms a conductive path with the power supply through the conductive sleeve 5124 and the low-voltage connecting plate 513. The plasma generating device 51 also includes a high-voltage connecting plate 514, where one end of the inner electrode 5121 near the conductive sleeve 5124 extends out of the insulating tube 5122 and forms a conductive path with the power supply through the high-voltage connecting plate 514.

[0520] In the above embodiments, by replacing the messy traditional welded wires 517 with low-voltage connection plates 513 and high-voltage connection plates 514, the electrical connections of all electrodes are integrated onto a single board, resulting in neat and standardized wiring, greatly simplifying the internal structure, and achieving standardized and modular electrical connections. Furthermore, the low-voltage connection plates 513 and 514 provide clear and reliable interfaces with stable resistance, avoiding problems such as incomplete soldering or missing solder joints that may occur with manual soldering, ensuring the consistency and long-term reliability of the conductivity of all electrodes. Moreover, the low-voltage connection plates 513 and 514 are connected to the electrode structure 512 via plug-in or crimp connections, significantly improving assembly efficiency and reducing production costs and reliance on worker skills. Furthermore, by concentrating the electrical connection between the outer electrode 5123 and the inner electrode 5121 on one side, all connection points can be fixed by epoxy resin potting on only one side. The single-sided potting is more convenient to operate than the existing double-sided potting, and the single-sided potting can also effectively ensure that the insulating tube 5122 will not be broken due to stress compression from the double-sided potting, which improves process efficiency and ensures the conductivity of the electrode structure 512.

[0521] Based on the above embodiments, as a further defined embodiment, the low-voltage connection plate 513 is connected to the grounding terminal of the power supply, and the high-voltage connection plate 514 is connected to the high-voltage terminal of the power supply. Preferably, the ends of the low-voltage connection plate 513 and the high-voltage connection plate 514 connected to the power supply are located on the same side to facilitate wiring. Specifically, the end of the low-voltage connection plate 513 near the power supply is connected to the grounding terminal of the power supply, and the end of the low-voltage connection plate 513 near the power supply is connected to the high-voltage terminal of the power supply through wires 517.

[0522] Based on the above implementation, one end of the mounting bracket 511 is provided with two cable trays 51112, which are respectively used for the wires 517 connecting the low-voltage connection plate 513 to the power supply and the wires 517 connecting the high-voltage connection plate 514 to the power supply.

[0523] In the above embodiment, the power connection terminals of the low-voltage connection plate 513 and the high-voltage connection plate 514 are located on the same side. Combined with the design of two independent cable trays 51112, the two conductors 517 can pass through in an orderly manner, resulting in neat wiring, high space utilization, and avoiding wire tangling, effectively saving installation space. Furthermore, the separate routing of the high and low voltage conductors through the two independent cable trays 51112 achieves physical isolation, effectively preventing interference and short-circuit risks between high and low voltage lines, and improving the electrical safety performance of the system. In addition, it facilitates installation and maintenance; the centralized arrangement of the power connection terminals on the same side facilitates wiring operations and subsequent maintenance. The design of the cable trays 51112 makes the fixing of the conductors 517 more standardized, less prone to confusion during disassembly, and reduces maintenance difficulty and error rate.

[0524] As a further defined embodiment, both the low-voltage connecting plate 513 and the high-voltage connecting plate 514 are located above the electrode structure 512, and the low-voltage connecting plate 513 and the high-voltage connecting plate 514 are respectively fixed on the mounting bracket 511 by means of snap-fit, plug-in or other methods.

[0525] In some alternative embodiments, the bottom edge of the upper frame of the mounting bracket 511 bends and extends towards the electrode structure 512 to form a first step position for accommodating and supporting the low-voltage connecting plate 513, which is then embedded and limited within this first step position. A second step position is formed at the top of the upper frame of the mounting bracket 511, within which the high-voltage connecting plate 514 is embedded and limited. The second step position is higher than the first step position, and the high-voltage connecting plate 514 is higher than the low-voltage connecting plate 513.

[0526] Furthermore, after the electrode structure 512, elastic buffer 515, pressure plate 516, low-voltage connecting plate 513, and high-voltage connecting plate 514 are all assembled, the upper cover 5112 and lower cover 5113 are fastened, and then insulating glue is poured into the upper cover 5112 to form an insulating seal, so that the low-voltage connecting plate 513 and high-voltage connecting plate 514 are insulated from the outside air, preventing leakage, sparking, or other related safety hazards. Optionally, the insulating glue is epoxy resin. When it is necessary to disassemble and maintain the electrode structure 512, the lower cover 5113 is opened for disassembly and maintenance.

[0527] In some embodiments, the conductive sleeve 5124 is made of copper foil or conductive adhesive.

[0528] In the above embodiments, copper foil possesses excellent conductivity and mechanical strength, and can be firmly wrapped around the electrode end through methods such as hot pressing to form a durable and reliable electrical interface, completely solving problems such as poor connection and easy oxidation caused by direct welding or binding. Conductive adhesive, on the other hand, has good adhesion and flexibility, and can cure at room temperature, making it particularly suitable for irregular surfaces. It can better adapt to manufacturing tolerances, further simplifying the assembly process, while providing good shock resistance. Whether using copper foil or conductive adhesive, the conductive sleeve 5124 can form a large-area, low-resistance stable contact with the spiral-shaped thin external electrode 5123 (such as carbon fiber) and the low-voltage connecting plate 513, facilitating electrical connection. Moreover, using copper foil or conductive adhesive to replace the original messy tail wire combing and welding makes the electrode end neat and standardized, eliminating quality fluctuations caused by individual operational differences and improving product consistency and aesthetics.

[0529] In some embodiments, the end of the outer electrode 5123 without the conductive sleeve 5124 is covered by insulating glue 5125, and both ends of the insulating tube 5122 are respectively covered by insulating glue 5125. One end of the insulating tube 5122 is through which the inner electrode 5121 passes, and the other end is completely covered by insulating glue 5125 to isolate air.

[0530] In some embodiments, both the low-voltage connection board 513 and the high-voltage connection board 514 are PCB boards.

[0531] In some embodiments, the insulating tube 5122 is a ceramic tube.

[0532] In the above embodiments, the insulating tube 5122 is made of ceramic material (such as alumina ceramic), which has extremely high insulation strength and arc resistance, and can effectively withstand the high voltage generated by glow discharge, prevent breakdown short circuit between electrodes, and ensure the safety and stability of the discharge process.

[0533] In other alternative embodiments, the insulating tube 5122 may also be a quartz tube, a glass tube, or a polytetrafluoroethylene tube.

[0534] In some embodiments, the two ends of the conductive sleeve 5124 are respectively covered and fixed to the outside of the insulating tube 5122 by insulating adhesive 5125.

[0535] In the above embodiments, the conductive sleeve 5124 is firmly glued to the insulating tube at both ends using insulating adhesive 5125, preventing the conductive sleeve 5124 from loosening or warping due to long-term use or vibration. Simultaneously, the covering of both ends with insulating adhesive 5125 ensures that current can only be drawn from predetermined locations on the conductive sleeve 5124, effectively preventing corona discharge or short circuits with adjacent components that may occur due to concentrated electric fields at the edges of the conductive sleeve 5124, thus improving safety.

[0536] Preferably, in this embodiment, the insulating adhesive 5125 is epoxy resin.

[0537] In some embodiments, the conductive sleeve 5124 covers one end of the outer electrode 5123; the electrode structure 512 has multiple sets arranged in a linear interval, and the conductive sleeve 5124 is provided in a corresponding manner, and the multiple conductive sleeves 5124 are provided at the same end of the multiple sets of electrode structures 512; the low-voltage connecting plate 513 is provided on the same side of the multiple sets of electrode structures 512 where the conductive sleeves 5124 are provided, and is fixedly connected to and electrically conductive with all the conductive sleeves 5124.

[0538] In the above embodiments, multiple electrode structures 512 are arranged linearly, and all conductive sleeves 5124 are located at the same end and are uniformly connected by a low-voltage connecting plate 513. All electrical connections are concentrated on the same side of the electrodes, so that only one side needs to be treated when potting epoxy resin, achieving single-sided potting. This significantly reduces stress and avoids the problem of uneven stress on both sides of the insulating tube 5122 and easy breakage caused by potting on both sides in the prior art, which significantly improves product yield and long-term reliability. Moreover, the same-side layout makes the device structure very compact and regular, and the appearance is more aesthetically pleasing.

[0539] In some embodiments, the axial length of the conductive sleeve 5124 is greater than D, and the end of the outer electrode 5123 is located in the middle of the conductive sleeve 5124. This ensures that the area of ​​the conductive sleeve 5124 is large enough to completely cover the end of the outer electrode 5123 and facilitates connection with the low-voltage connection plate 513.

[0540] In some embodiments, the low-voltage connecting plate 513 is snapped onto the outer periphery of the conductive sleeve 5124. The inner electrode 5121 is inserted into the high-voltage connecting plate 514.

[0541] In the above embodiments, the low-voltage connecting plate 513 and the conductive sleeve 5124 are connected by a snap-fit ​​method, which ensures a reliable connection and facilitates assembly and disassembly. The inner electrode 5121 is plugged into the high-voltage connecting plate 514 for easy assembly and disassembly.

[0542] In some embodiments, the low-voltage connecting plate 513 is provided with a bayonet 5131, which is interference-fitted onto the outer periphery of the conductive sleeve 5124.

[0543] In the above embodiments, the low-voltage connecting plate 513 is directly snapped onto the conductive sleeve 5124 through the interference fit bayonet 5131, realizing a weld-free and quick connection. During assembly, reliable electrical contact and mechanical fixation can be achieved simply by pressing, which further improves the assembly speed. Moreover, when it is necessary to replace a single electrode or the low-voltage connecting plate 513, it can be easily and quickly disassembled and installed, which is convenient for maintenance and replacement.

[0544] In some embodiments, the inner electrode 5121 has an extension section extending out of the insulating sleeve; the high voltage connection plate 514 is provided with a connection hole 5141 at the position corresponding to the extension section, and the extension section is inserted into the connection hole 5141.

[0545] In the above embodiment, the protruding section of the inner electrode 5121 is inserted into the connection hole 5141 of the high voltage connection plate 514, thereby ensuring the precise alignment of each inner electrode 5121 and forming a stable electrical connection through the tight fit between the connection hole 5141 and the inner electrode 5121. At the same time, it realizes the rapid and parallel assembly of the high voltage end and completes the efficient assembly closed loop of the entire device with "high and low voltage double-side plate connection".

[0546] Preferably, the protruding section and the connecting hole 5141 are interference-fitted, so that the inner electrode 5121 and the high-voltage connecting plate 514 are tightly connected, resulting in higher electrical conductivity stability. Of course, in other optional embodiments, conductive adhesive can be poured between the inner electrode 5121 and the connecting hole 5141 to further improve the stability of their connection.

[0547] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the protection scope of the embodiments of this application.

Claims

1. An air purifier, characterized in that, include: The outer casing (10) has an air inlet (100) in the middle, and an upper air outlet (101) and a lower air outlet (102) at the top and bottom, respectively. An upper fan assembly (21) is disposed inside the housing (10) for driving external air to flow from the air inlet (100) to the upper air outlet (101); The lower fan assembly (22) is disposed inside the housing (10) and is used to drive external air to flow from the air inlet (100) to the lower air outlet (102); The filter module (30) includes a filter support structure and a filter (31) disposed at the air inlet (100). A filter installation space is formed in the filter support structure, and the filter (31) is installed in the filter installation space. The filter support structure is inserted and positioned above the lower fan assembly (22) and is detachably connected and fixed by a connector; and / or, the upper fan assembly (21) is inserted and positioned above the filter support structure and is detachably connected and fixed by a connector; The air purifier also includes: Odor removal module (50), the downdraft assembly (22) has a downdraft duct, the odor removal module (50) is integrated and installed at the outlet of the downdraft duct; The deodorization module (50) includes a plasma generator (51), which can generate plasma by discharge to decompose odors in the air. The plasma generating device (51) includes: Mounting bracket (511) forms an electrode mounting area; A plurality of electrode structures (512) are arranged at intervals along the length of the mounting frame (511) in the electrode mounting area; There is a discharge gap between two adjacent electrode structures (512) and between the electrode structure (512) and the mounting bracket (511) for airflow to pass through; The downwind fan assembly (22) includes: A first fan (221) and a first bracket (222) for mounting the first fan (221), the plasma generator (51) is mounted on the outer periphery of the first bracket (222) and corresponds to the lower air outlet (102), the plasma generator (51) and the first bracket (222) enclose each other to form a lower air duct; The downdraft duct connects the air inlet (100) and the down outlet (102), and the first fan (221) is located in the downdraft duct; The lower air outlet (102) is distributed on at least two sides of the outer casing (10); The plasma generating device (51) is provided with at least two sets, and the at least two sets of plasma generating devices (51) are provided on at least two sides of the first bracket (222) corresponding to the lower air outlet (102); At least two sets of plasma generating devices (51) are enclosed with the first support (222) to form a downdraft duct that is closed at the bottom, draws air at the top, and discharges air from at least two sides; the first support (222) is a frame structure, and the first support (222) is provided with an overflow opening (2220) on one side corresponding to the lower air outlet (102). A slot (2221) is formed on the first support (222), and the plasma generator (51) is inserted into the slot (2221) and corresponds to the flow opening (2220); The deodorization module (50) also includes a metal mesh cover (52) and an ozone reduction mesh (53). Along the airflow direction, the plasma generator (51), the metal mesh cover (52), and the ozone reduction mesh (53) are arranged in sequence. The metal mesh cover (52) is grounded. The first bracket (222) is provided with a sliding groove for installing the metal mesh cover (52) and the ozone reduction mesh (53). The metal mesh cover (52) and the ozone reduction mesh (53) are slidably installed in the sliding groove from the side of the first bracket (222). Two sets of partition ribs are provided in the slot (2221) of the first bracket (222) to separate three slots for installing the plasma generator (51), the metal mesh cover (52), and the ozone reduction mesh (53) respectively.

2. The air purifier according to claim 1, characterized in that, The filter support structure includes: The bottom support assembly (33) and the top support assembly (32), and the intermediate support frame (34) disposed between the bottom support assembly (33) and the top support assembly (32), together enclose the filter installation space; The top support assembly (32) is provided with a first insertion part, and the upper fan assembly (21) is provided with a corresponding first insertion mating part. One of the first insertion part and the first insertion mating part is a slot, and the other is an insertion protrusion; and / or, The bottom support assembly (33) is provided with a second insertion part, and the lower fan assembly (22) is provided with a corresponding second insertion mating part. One of the second insertion part and the second insertion mating part is a slot and the other is an insertion protrusion.

3. The air purifier according to claim 2, characterized in that, The filter support structure is inserted and positioned above the first bracket (222) and fixed by screws.

4. The air purifier according to any one of claims 1 to 3, characterized in that, The upper fan assembly (21) includes a second fan (211), a second bracket (213) for mounting the second fan (211), and an upper air duct (212). The inlet end of the upper air duct (212) is connected to the upper purification outlet (3230) of the filter module (30), and the outlet end is connected to the upper air outlet (101). The second fan (211) is located inside the upper air duct (212). The second bracket (213) is installed on the side of the upper air duct (212) away from the filter support structure; the upper air duct (212) is inserted and positioned above the filter support structure and fixed by screws.

5. The air purifier according to any one of claims 1 to 3, characterized in that, The filter support structure includes: The top support assembly (32) includes a rotatably configured upper mating structure; Bottom support assembly (33), the bottom support assembly (33) includes a lifting module (332) and a tray (333) rotatably disposed above the lifting module (332). The filter (31) is disposed between the tray (333) and the upper mating structure; The filter module (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 (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 (31) is sandwiched between the upper mating structure and the tray (333).

6. The air purifier according to any one of claims 1 to 3, characterized in that, The filter (31) is rotatably disposed within the filter installation space, and the air purifier further includes: The ultraviolet sterilization module (60) is installed on the filter support structure and located on one side of the filter (31) for ultraviolet sterilization of the filter (31).

7. The air purifier according to any one of claims 1 to 3, characterized in that, The air purifier also includes: The display module (70) is integrated on the upper fan assembly (21), and the top of the housing (10) is open to form the upper air outlet (101). An air outlet grille (12) is installed inside the upper air outlet (101). The air outlet grille (12) is annular, and an opening is formed in the middle of the air outlet grille (12) to allow the display module (70) to be exposed.

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