Filtration devices and household appliances

Abstract

This invention relates to the field of air purification technology, disclosing a filtration device and a household appliance. The filtration device includes: a support frame; a filter structure; a dust collection structure, including a rotating dust collector disposed on one side of the filter structure, adapted to progressively adsorb dust from the surface of the filter structure along its axial direction during rotation; an active rotating mechanism connected to the filter structure; and a driven rotating mechanism driven between the filter structure and the rotating dust collector, adapted to drive the rotating dust collector to rotate when the active rotating mechanism drives the filter structure to rotate. The rotating dust collector enables uniform and effective adsorption of dust from all locations on the filter, resulting in better dust removal. Furthermore, the driven rotating mechanism, by rotating the dust collector to adsorb dust as the filter structure rotates, achieves the goals of saving motor costs, simplifying the number of parts, and improving production and assembly efficiency.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, specifically to filtration devices and household appliances. Background Technology

[0002] Traditional filter-type air purifiers purify the air by physically adsorbing small particles such as particulate matter, pollen, and formaldehyde through filters. However, with long-term use, impurities accumulate on the filter surface, which not only reduces the air intake area and affects the purification effect, but also causes bacterial growth, posing a health hazard.

[0003] Therefore, related technologies provide air purifiers with self-cleaning functions. The filter is driven to rotate by a drive mechanism, and the dust on the filter surface is removed by a vacuuming device located on one side of the filter, achieving the effect of self-cleaning the filter. The vacuuming device usually includes a vacuum pipe and a vacuum motor. The side of the vacuum pipe facing the filter has a vacuum port, which is a strip-shaped opening along the axial direction of the filter. The vacuum motor is connected to one end of the vacuum pipe to provide suction for the vacuum pipe to adsorb dust.

[0004] However, due to the relatively long suction port of the vacuum tube, the suction power varies at different points. The suction is stronger closer to the motor and significantly weaker further away, resulting in uneven adsorption of the filter and poor cleaning. Furthermore, in air purifiers with self-cleaning functions, not only the filter but also parts of the vacuum unit need to rotate. Since each rotation requires a motor, this not only increases costs but also leads to an excessive number of electrical components, wiring, screws, and fasteners, hindering production and assembly efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a filtration device and a household appliance to solve the problems of uneven adsorption force on various parts of the filter in the dust collection device of the existing air purifier, poor dust collection effect, high cost, too many parts, resulting in low production and assembly efficiency.

[0006] In a first aspect, the present invention provides a filtration device, comprising:

[0007] Support frame;

[0008] The filter structure is rotatably mounted within the support frame.

[0009] The dust collection structure includes a rotary dust collection component disposed on one side of the filter structure. The rotary dust collection component is adapted to adsorb dust on the surface of the filter structure step by step along the axial direction of the filter structure during rotation.

[0010] An active rotation mechanism is located at one end of the support frame. The active rotation mechanism is connected to the filter structure and is suitable for driving the filter structure to rotate.

[0011] The driven rotating mechanism is located at the other end of the support frame. The driven rotating mechanism is driven between the filter structure and the rotating dust collection component, and is suitable for driving the rotating dust collection component to rotate when the active rotating mechanism drives the filter structure to rotate.

[0012] Beneficial effects: The active rotating mechanism drives the filter structure to rotate, ensuring that the outer circumference of the filter structure is fully covered by the suction mechanism. This allows dust and foreign objects on the outer circumference of the filter to be sucked up, achieving cleaning of the entire circumference of the filter structure. Furthermore, the rotating suction component, driven by the driven rotating mechanism, rotates and progressively adsorbs dust along the axial direction of the filter structure, improving dust removal efficiency and ensuring uniform dust removal across all areas. This extends the filter's lifespan and reduces the need for manual cleaning. The rotating suction component, combined with the rotation of the filter structure, achieves comprehensive and thorough cleaning of the entire filter surface, uniformly and effectively adsorbing dust from all circumference and axial directions. This superior dust removal effectively solves the problem of uneven adsorption and poor dust removal performance in existing air purifiers.

[0013] Furthermore, the driven rotation mechanism, positioned between the filter structure and the rotating dust collector, allows the rotating dust collector to rotate when the active rotation mechanism drives the filter structure. This eliminates the need for a separate motor, saving on motor costs and reducing the need for additional electrical components, wiring, screws, and fasteners. This simplifies the component count, improves production efficiency, and reduces material costs. This effectively addresses the problem of air purifiers requiring motors for all rotation, which not only increases motor costs but also leads to an excessive number of electrical components, wiring, screws, and fasteners, hindering production and assembly and resulting in low overall production efficiency.

[0014] In one alternative embodiment, the driven rotation mechanism includes a driven gear engaged between the filter structure and the rotating vacuum cleaner.

[0015] Beneficial effects: When the rotating mechanism drives the filter structure to rotate, the filter structure can drive the rotating dust collection component to rotate through the driven gear. The driven rotating mechanism adopts a driven gear structure design that meshes between the filter structure and the rotating dust collection component, making the transmission between the filter structure and the rotating dust collection component more stable and reliable, and the structure is simple.

[0016] In one alternative embodiment, the active rotation mechanism is located at the bottom of the support frame, and the driven rotation mechanism is located at the top of the support frame.

[0017] Beneficial effects: Since the active rotating mechanism requires power components such as a motor and is relatively heavy, by setting the active rotating mechanism at the bottom of the support frame and the driven rotating mechanism at the top of the support frame, the active rotating mechanism can act as a counterweight, improving the stability of the entire filter device structure and avoiding the problem of the filter device being top-heavy and prone to tipping over.

[0018] In one alternative embodiment, the driven rotation mechanism includes:

[0019] A rotating top plate is rotatably mounted on the top of the support frame. The rotating top plate is connected to the filter screen structure and can rotate with the filter screen structure.

[0020] The driven gear is rotatably mounted on the top of the support frame, and the outer periphery of the rotating top plate is provided with a first external tooth;

[0021] The rotary vacuum cleaner is rotatably mounted on the support frame, and a first mating gear is fixedly mounted on the top of the rotary vacuum cleaner, with the driven gear meshing between the first external gear and the first mating gear.

[0022] Beneficial effects: The driven rotating mechanism includes a rotating top plate and a driven gear. The rotating top plate has a first external tooth on its outer circumference. The driven gear meshes with the first external tooth on the outer circumference of the rotating top plate and the first mating gear on the top of the rotating dust collector. When the filter structure rotates under the drive of the active rotating mechanism, it can drive the rotating top plate to rotate, thereby driving the driven gear and the first mating gear to rotate. Since the first mating gear is fixedly set on the rotating dust collector, it can drive the entire rotating dust collector to rotate, achieving the purpose of dust collection step by step along the axial direction of the filter structure. The transmission between the driven gear and the filter structure is realized by the rotating top plate as an intermediate part, which facilitates the separate disassembly and cleaning of the filter structure. It avoids the problems of inconvenience in disassembly and assembly and increased difficulty in forming the filter structure due to direct meshing between the filter structure and the driven gear.

[0023] In one alternative implementation, the suction structure further includes:

[0024] The outer cover is fixedly mounted on the support frame and located on one side of the filter structure. The side of the outer cover facing the filter structure has an opening that extends along the axial direction of the filter structure.

[0025] The rotary vacuum cleaner includes a vacuum tube that is rotatably inserted inside the outer casing, and the vacuum tube is provided with a vacuum port;

[0026] The suction port has a suction area corresponding to the opening and a closed area blocked by the outer casing. During the rotation of the rotary suction component, the suction area changes from one end to the other along the axial direction of the filter structure.

[0027] Beneficial effects: The outer casing has an opening on the side facing the filter structure, allowing a portion of the suction port on the suction hose to be exposed, thus effectively adsorbing dust from the filter structure. The main body of the outer casing also covers the other part of the suction port, concentrating suction power on the exposed area. Furthermore, the outer casing works in conjunction with the suction port during the rotation of the suction hose, shifting the suction area along the filter structure's axis from one end to the other as the rotating suction unit rotates. This allows the rotating suction unit to maintain a consistent suction force, gradually removing dust from the filter surface from top to bottom or bottom to top, improving filter dust removal efficiency and ensuring a clean result. Moreover, this method of cleaning the filter surface from top to bottom, compared to existing methods that use a hose connected to a suction head and then drive the head up and down to clean the filter structure axially, avoids hose strain and utilizes the filter structure's movement to drive the rotating suction unit, eliminating the need for an additional drive motor. This results in a simpler structure and lower cost.

[0028] In one optional embodiment, the suction port includes a plurality of strip-shaped suction ports arranged sequentially along the axial direction of the suction pipe, and the plurality of suction ports are staggered along the circumference of the suction pipe.

[0029] Beneficial effects: By adopting the aforementioned stepped opening design, the vacuum hose allows airflow to pass from top to bottom through the opening of the outer casing when the hose rotates, thus achieving top-down dust removal from the filter surface. Since the openings of each suction port are of the same shape and size, the suction force applied to the filter during rotation is also consistent, effectively ensuring uniform dust removal performance of the filter structure at all axial positions. In addition, the suction ports are designed with multiple strip-shaped holes staggered around the circumference of the vacuum hose, making the opening method simple and easy to process and shape, while effectively ensuring the structural strength of the vacuum hose.

[0030] In one alternative embodiment, the suction port is a spiral opening, extending spirally from one end of the suction tube to the other.

[0031] Beneficial effects: The spiral suction port has a uniformly wide spiral opening, and the opening on the outer casing is a strip opening with a uniform width. During the rotation of the suction pipe, the area of ​​the suction area exposed by the spiral is also uniform, ensuring that the suction power provided by the rotating suction component is also uniform. By adopting a spiral opening, the suction port ensures that the rotating suction component can continuously and uninterruptedly absorb dust during rotation, resulting in better dust removal effect.

[0032] In one optional embodiment, the vacuum cleaner is open at the lower end and closed at the upper end, and the support frame is provided with a mating interface suitable for rotating with the lower end of the vacuum cleaner.

[0033] The vacuuming structure also includes:

[0034] The vacuum motor is installed inside the support frame. The suction end of the vacuum motor is connected to the mating interface to achieve communication with the vacuum hose.

[0035] Beneficial effects: The upper end of the suction pipe is sealed to prevent the adsorbed dust from escaping, while the lower end of the suction pipe is open to facilitate the discharge of the sucked-in dust. The designed mating interface not only realizes the assembly between the support frame and the suction pipe, but also realizes the connection between the moving suction pipe and the stationary suction motor. The suction motor is connected to the inside of the suction pipe through the mating interface via a pipeline, thereby realizing the adsorption of dust on the filter screen through the suction pipe.

[0036] In one alternative implementation, the active rotation mechanism includes:

[0037] The power unit is fixedly installed at the bottom of the support frame;

[0038] The drive gear is fixedly mounted on the output shaft of the power unit, and the drive gear directly or indirectly meshes with the filter structure for transmission.

[0039] In one optional embodiment, the active rotation mechanism further includes:

[0040] A rotating chassis is rotatably mounted on the bottom of the support frame, and the outer periphery of the rotating chassis is provided with a second external tooth or a second mating gear is fixedly provided on the rotating chassis;

[0041] The drive gear meshes with the second external gear or the second mating gear, the rotating chassis is connected to the bottom of the filter structure, and can drive the filter structure to rotate under the drive of the power component.

[0042] In one alternative embodiment, the support frame includes:

[0043] The base assembly includes an active rotation mechanism.

[0044] The top cover assembly has a driven rotation mechanism located on it, and the filter structure is rotatably positioned between the base assembly and the top cover assembly.

[0045] Support columns are fixedly connected between the base assembly and the top cover assembly. There are multiple support columns, which are arranged at intervals along the circumference of the filter structure.

[0046] Multiple support columns, base assembly, and top cover assembly enclose an installation space suitable for accommodating the filter structure.

[0047] Secondly, the present invention also provides a household appliance including the filtration device of any of the above embodiments.

[0048] In one alternative implementation, the household appliance includes an air purifier. Attached Figure Description

[0049] 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.

[0050] Figure 1 This is a schematic diagram of the filter device at one angle in an embodiment of the present invention;

[0051] Figure 2 This is a schematic diagram of the filtering device from another angle in an embodiment of the present invention;

[0052] Figure 3 This is a cross-sectional view of the first position of the filtering device in an embodiment of the present invention;

[0053] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0054] Figure 5 for Figure 3 Enlarged view at point B in the middle;

[0055] Figure 6 This is a cross-sectional view of the second position of the filtering device in an embodiment of the present invention;

[0056] Figure 7 for Figure 6 Enlarged view at point C;

[0057] Figure 8 This is a cross-sectional view of the filtering device at the third position in an embodiment of the present invention;

[0058] Figure 9 for Figure 8Enlarged view at point D;

[0059] Figure 10 This is a schematic diagram of the structure of the base assembly after one corner has been removed in an embodiment of the present invention;

[0060] Figure 11 This is a schematic diagram of the rear structure of the base assembly engaging with the second mating gear on the rotating chassis in an embodiment of the present invention.

[0061] Figure 12 This is a schematic diagram of the filter structure in an embodiment of the present invention;

[0062] Figure 13 This is a schematic diagram of the structure of the filter screen cover in an embodiment of the present invention;

[0063] Figure 14 This is a schematic diagram of the structure of the filter screen lower cover in an embodiment of the present invention;

[0064] Figure 15 This is a front view of the rotating top plate in an embodiment of the present invention;

[0065] Figure 16 This is a top view of the rotating top plate in an embodiment of the present invention;

[0066] Figure 17 This is a schematic diagram of the bottom structure of the rotating top plate in an embodiment of the present invention;

[0067] Figure 18 This is a schematic diagram of the assembled structure of the rotary dust suction component and the outer casing in an embodiment of the present invention;

[0068] Figure 19 for Figure 18 Exploded view;

[0069] Figure 20 for Figure 18 A sectional view;

[0070] Figure 21 This is a schematic diagram of the structure of the rotating dust-collecting component in an embodiment of the present invention;

[0071] Figure 22 This is a front view of the rotating vacuum cleaner component in an embodiment of the present invention;

[0072] Figure 23 This is a cross-sectional view of the rotating dust-collecting component in an embodiment of the present invention.

[0073] Explanation of reference numerals in the attached figures:

[0074] 10. Support frame; 11. Base assembly; 110. Base body; 111. Mating interface; 12. Top cover assembly; 13. Support column;

[0075] 20. Filter screen structure; 21. Filter screen support; 211. Filter screen upper cover; 2111. First positioning rib; 212. Filter screen lower cover; 2121. Second positioning rib; 22. Filter element;

[0076] 30. Suction structure; 31. Rotary suction component; 311. Suction pipe; 3110. Suction port; 312. First mating gear; 32. Outer casing; 321. Opening; 322. Connecting part; 323. Positioning part; 324. Snap-fit ​​part; 325. Separating rib; 33. Snap ring; 34. Snap ring; 341. Positioning mating part;

[0077] 40. Active rotation mechanism; 41. Power component; 42. Drive gear; 43. Rotating chassis; 431. Second mating gear; 432. Second positioning groove;

[0078] 50. Driven rotating mechanism; 51. Driven gear; 52. Rotating top plate; 521. First external tooth; 522. First positioning groove. Detailed Implementation

[0079] 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.

[0080] Related technologies provide air purifiers with self-cleaning functions. The filter is driven to rotate by a drive mechanism, and then a vacuuming device located on one side of the filter removes the dust from the filter surface, achieving the effect of self-cleaning the filter. The vacuuming device usually includes a vacuum tube and a vacuum motor. The side of the vacuum tube facing the filter has a vacuum port, which is a strip-shaped opening along the axial direction of the filter. The vacuum motor is connected to one end of the vacuum tube, providing suction for the vacuum tube to adsorb dust.

[0081] However, because the suction port of the vacuum tube is relatively long, the suction power varies at different locations. The suction power is stronger at the location closer to the vacuum motor and significantly weaker at the location farther away from the vacuum motor. This results in uneven adsorption of the vacuum device on different locations of the filter, leading to inconsistent dust removal on the filter. The end farther away from the vacuum motor has more dust accumulation and poor filter cleaning effect.

[0082] In addition, air purifiers with self-cleaning functions in related technologies require not only the filter to rotate, but also some of the dust collection devices. Since each part needs to be driven by a motor, it is not only costly, but also results in an excessive number of electrical components, wiring, screws and fasteners, which is not conducive to production and assembly, and leads to low production and assembly efficiency of the whole machine.

[0083] The following is combined Figures 1 to 23 The following describes embodiments of the present invention.

[0084] According to an embodiment of the present invention, in one aspect, the present invention provides a filtration device, which includes a support frame 10, a filter structure 20, a dust suction structure 30, an active rotation mechanism 40, and a driven rotation mechanism 50.

[0085] Specifically, the filter structure 20 is rotatably disposed within the support frame 10; the dust collection structure 30 includes a rotating dust collection component 31 disposed on one side of the filter structure 20, which is adapted to adsorb dust on the surface of the filter structure 20 step by step along the axial direction of the filter structure 20 during rotation; an active rotating mechanism 40 is disposed at one end of the support frame 10 and is connected to the filter structure 20, which is adapted to drive the filter structure 20 to rotate; a driven rotating mechanism 50 is disposed at the other end of the support frame 10 and is driven between the filter structure 20 and the rotating dust collection component 31, which is adapted to drive the rotating dust collection component 31 to rotate when the active rotating mechanism 40 drives the filter structure 20 to rotate.

[0086] In the above embodiment, the filter structure 20 is driven to rotate by the active rotating mechanism 40, so that the outer circumferential surface of the filter structure 20 can pass through the suction structure 30, and the dust and foreign objects on the outer circumferential surface of the filter element 22 can be sucked up by the suction structure 30, thereby achieving cleaning of the entire circumference of the filter structure 20. Furthermore, the rotating suction component 31 is driven by the driven rotating mechanism 50 to rotate, and the rotating suction component 31 can achieve adsorption of dust on the surface of the filter structure 20 step by step along the axial direction of the filter structure 20 during the rotation process. To improve the dust removal efficiency of the filter, ensure uniform dust removal effect at all locations on the filter, increase the service life of the filter, and reduce the hassle of manual cleaning, the aforementioned rotating dust suction component 31, in conjunction with the rotation of the filter structure 20, achieves all-round, thorough, and effective cleaning of the entire surface of the filter structure 20. It can evenly and effectively adsorb dust from all locations on the circumference and axis of the filter, resulting in better dust removal effect. This effectively solves the problem of uneven adsorption force and poor dust removal effect at various locations on the filter in existing air purifier dust suction devices.

[0087] Furthermore, the driven rotation mechanism 50, which is configured between the filter structure 20 and the rotating dust-collecting component 31, can drive the rotating dust-collecting component 31 to rotate when the active rotation mechanism 40 drives the filter structure 20 to rotate. This eliminates the need for a separate motor to drive the rotating dust-collecting component 31, saving on motor costs. It also eliminates the need for corresponding electrical components, wiring, screws, and fasteners, simplifying the number of parts and improving production and assembly efficiency, while reducing material costs. This effectively solves the problem that air purifiers require motors to drive the rotation of each part, which not only increases motor costs but also results in an excessive number of electrical components, wiring, screws, and fasteners, hindering production and assembly and leading to low overall production and assembly efficiency.

[0088] Furthermore, in this embodiment, the filter structure 20 is rotatable around its central axis, and the suction structure 30 is disposed on one side of the filter structure 20 with a predetermined gap between them to prevent interference between the filter and the suction structure 30 during rotation. Optionally, in this embodiment, the central axis of the filter structure 20 is vertical, and the rotating suction component 31 can remove dust from the surface of the filter along the filter structure 20 from top to bottom or from bottom to top during rotation.

[0089] In one embodiment, combined with Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the driven rotation mechanism 50 includes a driven gear 51 that meshes between the filter structure 20 and the rotating dust collection component 31.

[0090] In the above embodiments, when the active rotating mechanism 40 drives the filter structure 20 to rotate, the filter structure 20 can drive the rotating dust collector 31 to rotate through the driven gear 51. The driven rotating mechanism 50 adopts the structural design of the driven gear 51 meshing between the filter structure 20 and the rotating dust collector 31, which makes the transmission between the filter structure 20 and the rotating dust collector 31 more stable and reliable, and the structure is simple.

[0091] Specifically, the driven gear 51 is rotatably mounted on the support frame 10. The driven gear 51 can directly mesh with the filter structure 20 or indirectly mesh with it through an intermediate part. The rotating dust suction component 31 is provided with a mating structure that cooperates with the driven gear 51.

[0092] In one embodiment, the active rotation mechanism 40 is disposed at the bottom of the support frame 10, and the driven rotation mechanism 50 is disposed at the top of the support frame 10.

[0093] In the above embodiment, since the active rotating mechanism 40 needs to be equipped with power components such as motors and has a large weight, by setting the active rotating mechanism 40 at the bottom of the support frame 10 and the driven rotating mechanism 50 at the top of the support frame 10, the active rotating mechanism 40 can act as a counterweight to improve the stability of the entire filter device structure and avoid the problem of the filter device being top-heavy and easy to tip over.

[0094] In one embodiment, the driven rotating mechanism 50 includes a rotating top plate 52 and a driven gear 51. The rotating top plate 52 is rotatably mounted on the top of the support frame 10, connected to the filter structure 20, and can rotate with the filter structure 20. The driven gear 51 is rotatably mounted on the top of the support frame 10, and a first external tooth 521 is provided on the outer periphery of the rotating top plate 52. The rotating dust suction component 31 is rotatably mounted on the support frame 10, and a first mating gear 312 is fixedly provided on the top of the rotating dust suction component 31. The driven gear 51 meshes between the first external tooth 521 and the first mating gear 312.

[0095] In the above embodiments, combined with Figure 3 , Figure 4 , Figure 6 and Figure 7 , Figures 15 to 17 As shown, the driven rotating mechanism 50 includes a rotating top plate 52 and a driven gear 51. The rotating top plate 52 has a first external tooth 521 on its outer periphery. The driven gear 51 meshes with the first external tooth 521 on the outer periphery of the rotating top plate 52 and the first mating gear 312 on the top of the rotating dust collection component 31. When the filter structure 20 rotates under the drive of the active rotating mechanism 40, it can drive the rotating top plate 52 to rotate, thereby driving the driven gear 51 and the first mating gear 312 to rotate. Since the first mating gear 312 is fixedly set on the rotating dust collection component 31, it can drive the entire rotating dust collection component 31 to rotate, thereby achieving the purpose of dust collection step by step along the axial direction of the filter structure 20. The transmission between the driven gear 51 and the filter structure 20 is realized by the rotating top plate 52 as an intermediate part, which facilitates the separate disassembly and cleaning of the filter structure 20 and avoids the problem of inconvenience in disassembly and assembly of the filter structure 20 and the increased difficulty in forming the filter structure 20 by directly meshing with the driven gear 51.

[0096] Specifically, the rotating top plate 52 has a disc-shaped structure, and the first external teeth 521 are several teeth formed on the outer peripheral wall of the rotating top plate 52. The rotating top plate 52 is detachably connected to the filter screen structure 20, which facilitates disassembly and cleaning of the filter screen structure 20.

[0097] Furthermore, combined Figures 1 to 9 as well as Figures 12 to 14As shown, the filter structure 20 has a cylindrical filter element 22 and a filter support 21 for mounting the filter element 22. The filter support 21 includes a filter upper cover 211 and a filter lower cover 212 respectively disposed at the upper and lower ends of the filter element 22. The filter element 22 is fixedly disposed between the filter upper cover 211 and the filter lower cover 212. Preferably, the filter element 22 is detachably connected to the filter upper cover 211 and the filter lower cover 212, which facilitates individual disassembly, replacement or cleaning of the filter element 22.

[0098] Furthermore, combined Figure 12 , Figure 13 , Figure 15 , Figure 17 As shown, the lower surface of the rotating top plate 52 is provided with a first positioning groove 522, and the upper surface of the filter screen cover 211 is provided with a first positioning rib 2111. The first positioning rib 2111 cooperates with the first positioning groove 522, and the connection between the rotating top plate 52 and the filter screen cover 211 is realized through the concave-convex cooperation. This not only enables the rotating top plate 52 and the filter screen structure 20 to move synchronously in the circumferential direction, but also makes disassembly and assembly more convenient and quick.

[0099] In the above embodiment, the rotating top plate 52 is assembled with the filter screen cover 211. The filter screen cover 211 is provided with a first positioning rib 2111, which cooperates with the first positioning groove 522 of the rotating top plate 52. When the filter screen structure 20 rotates, the first positioning rib 2111 and the first positioning groove 522 can drive the rotating top plate 52 to rotate.

[0100] Preferably, the first positioning ribs 2111 and the first positioning grooves 522 are arranged in multiple intervals, which further improves the stability and reliability of the fit between the rotating top plate 52 and the filter structure 20.

[0101] More preferably, combined with Figure 1 , Figure 3 , Figure 12 , Figure 13 , Figure 17 As shown, the extension directions of the multiple first positioning ribs 2111 are located in the same straight line or parallel to each other. This design makes it convenient to pull the filter structure 20 out of the support frame 10 from the side or slide it into the support frame 10, providing convenience for disassembling and assembling the filter structure 20.

[0102] In one embodiment, combined with Figures 2 to 4 , Figure 6 , Figure 7 , Figures 18 to 23As shown, the dust collection structure 30 also includes an outer cover cylinder 32, which is fixedly mounted on the support frame 10 and located on one side of the filter structure 20. The outer cover cylinder 32 has an opening 321 on the side facing the filter structure 20, and the opening 321 extends along the axial direction of the filter structure 20. The rotary dust collection component 31 includes a dust collection pipe 311 rotatably inserted inside the outer cover cylinder 32, and a dust collection port 3110 is provided on the dust collection pipe 311. The dust collection port 3110 has a dust collection area corresponding to the opening 321 and a closed area blocked by the outer cover cylinder 32. During the rotation of the rotary dust collection component 31, the dust collection area changes from one end to the other along the axial direction of the filter structure 20.

[0103] In the above embodiment, the outer cover 32 has an opening 321 on the side facing the filter structure 20. The opening 321 allows a portion of the suction port 3110 on the suction pipe 311 to be exposed, thereby achieving the effect of adsorbing dust on the filter structure 20. The main body of the outer cover 32 can also cover another part of the suction port 3110, so that the suction force is concentrated in the exposed suction area. In addition, the outer cover 32 can also cooperate with the suction port 3110 during the rotation of the suction pipe 311, so that the suction area changes from one end to the other along the axial direction of the filter structure 20 during the rotation of the rotating suction component 31. This allows the rotating suction component 31 to maintain the same suction force and gradually remove dust from the filter surface from top to bottom or from bottom to top, thereby improving the dust removal efficiency of the filter and ensuring the cleaning effect. Furthermore, the above method of cleaning dust from the filter surface by moving it up and down is superior to the existing method of connecting a vacuum head to a hose and then moving the vacuum head up and down to clean the filter structure 20 axially. This method does not cause the hose to be pulled, and the movement of the filter structure 20 can also drive the rotating vacuum component 31 to move. There is no need to set up an additional drive motor, the structure is simpler, and the cost is lower.

[0104] Specifically, the opening 321 is a strip-shaped opening on the outer wall of the outer casing 32, and the length of the opening 321 is not less than the length of the filter structure 20. The width of the opening 321 is uniform, ensuring that the area of ​​the suction port 3110 exposed during the rotation of the suction pipe 311 is consistent, thereby ensuring consistent suction power.

[0105] Furthermore, combined Figure 6 , Figure 10 , Figures 18 to 20 The bottom of the outer cover 32 is fixedly provided with a connecting part 322, which is suitable for being connected to the support frame 10 by screws, making it easy to assemble and disassemble. Preferably, multiple connecting parts 322 are provided at intervals on the circumference of the bottom of the outer cover 32, and the multiple connecting parts 322 are respectively connected to the support frame 10 by screws, which improves the stability of the structure.

[0106] In one embodiment, combined with Figures 19 to 23 As shown, the suction port 3110 includes a plurality of strip-shaped suction ports 3110 arranged sequentially along the axial direction of the suction pipe 311, and the plurality of suction ports 3110 are staggered in the circumferential direction along the suction pipe 311.

[0107] In the above embodiment, the suction pipe 311 adopts the stepped opening design. When the suction pipe 311 rotates, the airflow can pass through the opening 321 of the outer cover cylinder 32 from top to bottom in the suction assembly, thereby achieving the removal of dust from the filter surface from top to bottom. Since the opening shape and size of each suction port 3110 are consistent, the suction force applied to the filter during rotation is also consistent, thereby effectively ensuring that the dust removal effect of the filter structure 20 is uniform and consistent in all positions in the axial direction. In addition, the suction port 3110 adopts a design of multiple strip holes arranged in a staggered manner around the circumference of the suction pipe 311. The opening method is simple and easy to process and form, and can effectively ensure the structural strength of the suction pipe 311.

[0108] Specifically, in this embodiment, multiple suction ports 3110 are distributed throughout the axial direction of the entire suction pipe 311 to ensure that each position of the filter screen in the axial direction can be cleaned and guided. Furthermore, the multiple suction ports 3110 are evenly spaced and staggered in the circumferential direction to further improve the suction effect.

[0109] Preferably, in this embodiment, there are four suction ports 3110. The four suction ports 3110 can be spaced apart from each other at a certain angle in the circumferential direction, or they can be arranged adjacent to each other and staggered in the circumferential direction.

[0110] In this embodiment, when one suction port 3110 is exposed during the rotation of the suction pipe 311, the other suction ports 3110 can be blocked by the outer cover 32, ensuring that the suction force is concentrated at the exposed suction port 3110, thereby enabling the suction pipe 311 to provide uniform suction force from top to bottom during the rotation.

[0111] In this embodiment, the outer cover 32 and the suction pipe 311 can fit together to minimize the gap between them. This ensures that the suction pipe 311 can rotate freely while also sealing off other suction ports 3110.

[0112] In some preferred embodiments, combined with Figure 19 , Figure 20As shown, multiple sets of annular dividing ribs 325 can be arranged at intervals inside the outer casing 32. An annular dividing cavity is formed between two adjacent dividing ribs 325. The number of dividing cavities is the same as the number of suction ports 3110 and they are arranged one-to-one. Each suction port 3110 is located in a dividing cavity. After the suction pipe 311 is assembled into the outer casing 32, the annular dividing ribs 325, the outer wall of the suction pipe 311, and the inner wall of the outer casing 32 form a closed annular dividing cavity, thereby separating each suction port 3110, preventing them from communicating with each other, and allowing them to work independently. The dividing ribs 325 can ensure the sealing effect of the blocked suction ports 3110, ensuring that the suction is concentrated at the exposed suction ports 3110, and can also effectively prevent the dust sucked in by the exposed suction ports 3110 from falling into the outer casing 32, which would be inconvenient to clean.

[0113] In an alternative embodiment, the suction port 3110 is a spiral opening, extending spirally from one end of the suction tube 311 to the other end.

[0114] In the above embodiment, the spiral suction port 3110 is a spiral opening with a uniform width, and the opening 321 on the outer cover cylinder 32 is a strip opening with a uniform width. During the rotation of the suction pipe 311, the area of ​​the suction area exposed by the spiral is also uniform, ensuring that the suction force provided by the rotating suction component 31 is also uniform during the rotation. By adopting a spiral opening, the suction port 3110 ensures that the rotating suction component 31 can continuously and uninterruptedly adsorb dust during the rotation, resulting in better dust removal effect.

[0115] In this embodiment, the suction port 3110 can be a single-turn spiral or a multi-turn spiral. Preferably, in this embodiment, the suction port 3110 is a single-turn spiral to ensure the structural strength of the suction pipe 311, and the line connecting the first and last ends of the single-turn spiral suction port 3110 is parallel to the central axis of the suction pipe 311, further ensuring the continuity of suction.

[0116] In one embodiment, the suction pipe 311 is open at the lower end and closed at the upper end. The support frame 10 is provided with a mating interface 111 suitable for rotating with the lower end of the suction pipe 311. The suction structure 30 also includes a suction motor, which is installed in the support frame 10. The suction end of the suction motor is connected to the mating interface 111 to achieve communication with the suction pipe 311.

[0117] In the above embodiments, combined with Figure 3 , Figure 10 , Figures 19 to 23As shown, the upper end of the suction pipe 311 is closed to prevent the adsorbed dust from escaping, while the lower end of the suction pipe 311 is open to facilitate the discharge of the sucked-in dust. The mating interface 111 not only realizes the assembly between the support frame 10 and the suction pipe 311, but also realizes the connection between the moving suction pipe 311 and the stationary suction motor. The suction motor is connected to the inside of the suction pipe 311 through the mating interface 111 via a pipeline, thereby realizing the adsorption of dust on the filter screen through the suction pipe 311.

[0118] Optionally, a rotary sealing structure is provided between the interface 111 and the suction pipe 311 to prevent dust from escaping from the connection gap between the two, or the two can also be connected by means of a bearing.

[0119] Preferably, combined with Figure 6 , Figure 10 , Figures 18 to 20 As shown, a mating interface 111 is formed on the top wall of the base assembly 11 of the support frame 10. The outer periphery of the mating interface 111 matches the inner periphery of the suction pipe 311. More preferably, a positioning groove is also provided on the outer periphery of the mating interface 111. The width of the positioning groove matches the thickness of the suction pipe 311, so that the lower end of the suction pipe 311 can be positioned in the positioning groove to further improve the assembly effect. In addition, the positioning groove and the concave-convex fit of the lower end of the suction pipe 311 can also play a sealing role to prevent dust from escaping.

[0120] In one embodiment, the first mating gear 312 and the dust suction pipe 311 are integrally formed. The radius of the driven gear 51 is larger than that of the first mating gear 312. The driven gear 51 serves as an intermediate component to realize the mating gear between the rotating top plate 52 and the rotating airflow component. Compared with the two directly meshing, the size of the rotating top plate 52 and the first mating gear 312 can be adaptively reduced, saving more space and making assembly and installation more convenient.

[0121] Furthermore, combined Figures 18 to 21As shown, the outer casing 32 is a cylindrical structure with openings at the top and bottom. The upper and lower ends of the suction pipe 311 extend out of the outer casing 32. The suction structure 30 also includes a retaining spring 33, which has two halves. The two halves of the retaining spring 33 are respectively engaged with the outer casing 32 and located on the outer periphery of the connection position between the suction pipe 311 and the outer casing 32. An opening is formed in the center of the two halves of the retaining spring 33 for the upper end of the suction pipe 311 to extend out. The suction pipe 311 includes a main body section located inside the outer casing 32 and an extension section with a narrowed upper end. The extension section passes through the retaining spring 33, and the outer diameter of the extension section is smaller than the inner diameter of the opening in the center of the retaining spring 33 to ensure that the suction pipe 311 can rotate freely. A first mating gear 312 is fixedly connected to or integrally formed at the upper end of the extension section. Preferably, an annular boss is provided between the main body section and the extended section. The outer diameter of the annular boss is larger than the inner diameter of the opening at the center of the retaining ring 33. The inner ring edge of the retaining ring 33 extends into and is limited in the annular groove formed between the annular boss and the main body section.

[0122] Furthermore, the suction structure 30 also includes a retaining ring 34, which is fitted around the outer periphery of the retaining spring 33 to reinforce the connection between the retaining spring 33 and the suction pipe 311 and the outer casing 32.

[0123] Preferably, a positioning part 323 is fixedly provided on the outer peripheral wall of the outer cover cylinder 32, and a positioning mating part 341 that cooperates with the positioning part 323 is provided on the retaining ring 34, which is suitable for fixing the two in the circumferential direction through the cooperation of the positioning part 323 and the positioning mating part 341.

[0124] More preferably, the positioning part 323 is a positioning rib, and the positioning mating part 341 is a positioning groove opened on the lower edge of the retaining ring 34. The positioning part 323 includes a plurality of parts spaced apart along the circumference of the outer cover cylinder 32, and the positioning mating part 341 is also provided in a corresponding plurality of places.

[0125] Furthermore, a buckle is provided on the outer peripheral wall of the outer casing 32, and a clearance opening is provided on the snap spring 33 corresponding to the buckle for it to pass through. A slot is provided on the snap ring 34 corresponding to the snaple for engaging with the buckle. The buckle passes through the clearance opening and engages with the slot, thereby further strengthening the stability of the connection between the outer casing 32 and the snap spring 33 and snap ring 34, thereby ensuring the reliability of the engagement between the outer casing 32 and the vacuum pipe 311.

[0126] In one embodiment, combined with Figure 1 , Figure 3 , Figure 5 , Figures 8 to 10 As shown, the active rotation mechanism 40 includes a power component 41 and an active gear 42. The power component 41 is fixedly installed at the bottom of the support frame 10; the active gear 42 is fixedly installed on the output shaft of the power component 41, and the active gear 42 directly or indirectly meshes with the filter structure 20 for transmission.

[0127] Optionally, the power component 41 is a stepper motor, and the drive gear 42 is fixedly connected to the output shaft of the motor. The drive gear 42 directly or indirectly meshes with the filter structure 20 to drive the filter structure 20 to rotate. Driving the filter structure 20 to rotate through gear transmission makes the rotation of the filter more stable and reliable.

[0128] Of course, in other alternative embodiments, the output shaft of the power component 41 can also be directly connected to the filter structure 20 to drive the filter structure 20 to rotate.

[0129] In one embodiment, combined with Figure 8 , Figures 9 to 11 As shown, the active rotation mechanism 40 also includes a rotating chassis 43, which is rotatably mounted on the bottom of the support frame 10. The outer periphery of the rotating chassis 43 is provided with a second external tooth or a second mating gear 431 is fixedly provided on the rotating chassis 43. The active gear 42 meshes with the second external tooth or the second mating gear 431. The rotating chassis 43 is connected to the bottom of the filter structure 20 and can drive the filter structure 20 to rotate under the drive of the power component 41.

[0130] In the above embodiment, the drive gear 42 and the filter structure 20 are driven by the rotating chassis 43 as an intermediate component, which facilitates the separate disassembly and cleaning of the filter structure 20 and avoids the problems of inconvenience in disassembly and assembly due to direct meshing between the filter structure 20 and the drive gear 42, and the increased difficulty in forming the filter structure 20.

[0131] In this embodiment, several teeth can be directly constructed on the outer periphery of the rotating chassis 43 to form a second external tooth, which meshes with the drive gear 42. Alternatively, a second mating gear 431 can be fixedly provided on the bottom wall of the rotating chassis 43, and the meshing between the rotating chassis 43 and the drive gear 42 can be achieved by the second mating gear 431 meshing with the drive gear 42. The accompanying drawings of this embodiment show the second mating gear 431.

[0132] Specifically, in combination Figure 3 , Figure 5 , Figure 10 , Figure 12 , Figure 14 As shown, a second positioning groove 432 is provided on the top wall of the rotating base 43, and a second positioning rib 2121 is provided on the lower surface of the filter screen cover 212. The second positioning rib 2121 cooperates with the second positioning groove 432, and the connection between the rotating top plate 52 and the filter screen cover 211 is realized through the concave-convex cooperation. This not only enables the rotating top plate 52 and the filter screen structure 20 to move synchronously in the circumferential direction, but also makes disassembly and assembly more convenient and quick.

[0133] In the above embodiment, the rotating base 43 is assembled with the filter screen lower cover 212. The filter screen lower cover 212 is provided with a second positioning rib 2121, which cooperates with the second positioning groove 432 of the rotating base 43. When the rotating base 43 rotates, the filter screen structure 20 can be rotated by the second positioning rib 2121 and the second positioning groove 432.

[0134] Preferably, the second positioning groove 432 is an elongated groove that is radially opened along the rotating base 43, and the second positioning rib 2121 is a strip-shaped rib that extends radially along the filter screen cover 212. The combination of the elongated groove and the rib further improves the stability and reliability of the fit between the rotating top plate 52 and the filter screen structure 20, while also facilitating the disassembly and assembly of the filter screen structure 20.

[0135] In one embodiment, combined with Figures 1 to 3 As shown, the support frame 10 includes a base assembly 11, a top cover assembly 12, and support columns 13. An active rotation mechanism 40 is disposed on the base assembly 11; a driven rotation mechanism 50 is disposed on the top cover assembly 12; and the filter structure 20 is rotatably disposed between the base assembly 11 and the top cover assembly 12. The support columns 13 are fixedly connected between the base assembly 11 and the top cover assembly 12. There are multiple support columns 13, which are arranged at intervals along the circumference of the filter structure 20. The multiple support columns 13, the base assembly 11, and the top cover assembly 12 enclose an installation space suitable for accommodating the filter structure 20.

[0136] In the above embodiments, the base assembly 11 and the top cover assembly 12 each include a shell structure with an internal cavity, and the active rotation mechanism 40 and the driven rotation mechanism 50 are respectively installed inside the shell structure to achieve the concealment of the structure.

[0137] Preferably, the base assembly 11 and the top cover assembly 12 are each formed by two housings that are detachably connected, which facilitates disassembly and assembly of the various internal components.

[0138] Optionally, such as Figure 2 , Figure 6 , Figure 7 , Figure 10 As shown, the base assembly 11 includes a base body 110 with a mounting cavity. The lower end of the outer cover 32 is fixed to the top wall of the base body 110, and the upper end is limited on the top cover assembly 12. The bottom wall of the top cover assembly 12 is provided with an annular baffle corresponding to the outer cover 32. The inner circumference of the annular baffle is positioned and engaged with the retaining ring 34 on the outer circumference of the outer cover 32 to prevent the outer cover 32 and the suction pipe 311 from deviating from the central axis of the filter structure 20.

[0139] In this embodiment, the rotation is achieved by the rotation of a stepper motor and the cooperation of various driven components. In this embodiment, the stepper motor in the base assembly 11 can drive the driven components to drive the filter structure 20 to rotate and drive the rotating dust suction component 31 to rotate. There is no need to add an additional stepper motor on the top cover assembly 12 to drive the rotating dust suction component 31 to rotate, which saves driving costs and simplifies the structure.

[0140] In this embodiment, the structure and function of each component of the driven rotation mechanism 50 are as follows:

[0141] Combination Figures 1 to 4 , Figure 6 , Figure 7 , Figures 15 to 17 As shown, the rotating top plate 52 is used to fix the filter structure 20 and transmit the rotation of the filter structure 20 to the driven gear 51. The rotating top plate 52 is set in the top cover assembly 12. The rotating top plate 52 is annular in shape, and the outer annular curved surface has gear features. These gear features can cooperate with the driven gear 51 to realize the rotational transmission.

[0142] Combination Figures 1 to 4 , Figure 6 , Figure 7 , Figures 18 to 23 As shown, the rotary dust collector 31 is driven by the rotation of the driven gear 51 to rotate in the outer casing 32 to adsorb dust from the various surfaces of the filter structure 20. The rotary dust collector 31 is cylindrical in shape and has a gear feature on the top. This gear feature can cooperate with the driven gear 51 to realize the rotational transmission.

[0143] Combination Figures 1 to 4 , Figure 6 , Figure 7 , Figures 18 to 23 As shown, the driven gear 51 is used to transmit the rotation of the rotating top plate 52 to the rotating dust suction component 31 and is installed in the top cover assembly 12. Through the transmission cooperation between the driven gear 51, the rotating top plate 52 and the rotating dust suction component 31, the components that originally rotated independently can be linked together, which effectively solves the problem of low production and assembly efficiency caused by too many parts in the existing structure.

[0144] In this embodiment, the movement process of the filtration device is as follows:

[0145] The power component 41 in the base assembly 11 drives the drive gear 42 to rotate, which in turn drives the rotating chassis 43 to rotate. The rotating chassis 43 drives the filter structure 20 to rotate, which in turn drives the rotating top plate 52 in the top cover assembly 12 to rotate. The driven gear 51 then drives the rotating dust collection component 31 in the dust collection structure 30 to rotate. The filter device provided in this embodiment improves assembly efficiency and reduces material costs by adopting the above-mentioned driven rotating mechanism 50.

[0146] According to an embodiment of the present invention, in another aspect, a household appliance is provided, including the filtration device of any of the above embodiments.

[0147] Optionally, household appliances include air purifiers.

[0148] It should be noted that the filtration device provided in this embodiment is not limited to air purifiers, but can be applied to other product series that share the same principle as air purifiers, such as air conditioners and air coolers.

[0149] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A filtration device, characterized in that, include: Support frame (10); The filter structure (20) is rotatably disposed within the support frame (10); The dust collection structure (30) includes a rotating dust collection component (31) disposed on one side of the filter structure (20), the rotating dust collection component (31) being adapted to adsorb dust on the surface of the filter structure (20) step by step along the axial direction of the filter structure (20) during rotation; An active rotation mechanism (40) is provided at one end of the support frame (10). The active rotation mechanism (40) is connected to the filter structure (20) and is adapted to drive the filter structure (20) to rotate. The driven rotating mechanism (50) is located at the other end of the support frame (10). The driven rotating mechanism (50) is driven between the filter structure (20) and the rotating dust collector (31). It is suitable for driving the rotating dust collector (31) to rotate when the active rotating mechanism (40) drives the filter structure (20) to rotate. The dust collection structure (30) also includes: The outer cover (32) is fixedly mounted on the support frame (10) and located on one side of the filter structure (20). The outer cover (32) has an opening (321) on the side facing the filter structure (20), and the opening (321) extends along the axial direction of the filter structure (20). The rotary vacuum cleaner (31) includes a vacuum tube (311) rotatably inserted inside the outer casing (32), and the vacuum tube (311) is provided with a vacuum port (3110). The suction port (3110) has a suction area corresponding to the opening (321) and a closed area blocked by the outer cover (32). During the rotation of the rotating suction component (31), the suction area changes from one end to the other along the axial direction of the filter structure (20). The suction port (3110) includes a plurality of strip-shaped suction ports (3110) arranged sequentially along the axial direction of the suction pipe (311), and the plurality of suction ports (3110) are staggered in the circumferential direction along the suction pipe (311); Alternatively, the suction port (3110) is a spiral opening, and the suction port (3110) extends spirally from one end of the suction tube (311) to the other end.

2. The filtration device according to claim 1, characterized in that, The driven rotating mechanism (50) includes a driven gear (51) meshing between the filter structure (20) and the rotating dust collection component (31). And / or, the active rotation mechanism (40) is disposed at the bottom of the support frame (10), and the driven rotation mechanism (50) is disposed at the top of the support frame (10).

3. The filtration device according to claim 1, characterized in that, The driven rotation mechanism (50) includes: A rotating top plate (52) is rotatably mounted on the top of the support frame (10). The rotating top plate (52) is connected to the top of the filter structure (20) and can rotate with the filter structure (20). Driven gear (51) is rotatably mounted on the top of the support frame (10), and the outer periphery of the rotating top plate (52) is provided with a first external tooth (521). The rotary vacuum cleaner (31) is rotatably mounted on the support frame (10), and a first mating gear (312) is fixedly mounted on the top of the rotary vacuum cleaner (31), and the driven gear (51) meshes between the first external gear (521) and the first mating gear (312).

4. The filtration device according to claim 1, characterized in that, The vacuum tube (311) is open at the bottom and closed at the top. The support frame (10) is provided with a mating interface (111) suitable for rotating with the lower end of the vacuum tube (311). The dust collection structure (30) also includes: A vacuum motor is installed inside the support frame (10). The suction end of the vacuum motor is connected to the mating interface (111) to achieve communication with the vacuum pipe (311).

5. The filtration device according to any one of claims 1 to 3, characterized in that, The active rotation mechanism (40) includes: The power unit (41) is fixedly installed at the bottom of the support frame (10); The drive gear (42) is fixedly mounted on the output shaft of the power component (41), and the drive gear (42) directly or indirectly meshes with the filter structure (20) for transmission.

6. The filtration device according to claim 5, characterized in that, The active rotation mechanism (40) further includes: A rotating chassis (43) is rotatably mounted on the bottom of the support frame (10), and the outer periphery of the rotating chassis (43) is provided with a second external tooth or a second mating gear (431) is fixedly provided on the rotating chassis (43). The drive gear (42) meshes with the second external gear or the second mating gear (431), the rotating chassis (43) is connected to the bottom of the filter structure (20), and can drive the filter structure (20) to rotate under the drive of the power component (41).

7. The filtration device according to any one of claims 1 to 3, characterized in that, The support frame (10) includes: The base assembly (11) is provided with the active rotation mechanism (40). The top cover assembly (12) is provided with the driven rotation mechanism (50) disposed on the top cover assembly (12), and the filter structure (20) is rotatably disposed between the base assembly (11) and the top cover assembly (12); Support columns (13) are fixedly connected between the base assembly (11) and the top cover assembly (12). There are multiple support columns (13), and the multiple support columns (13) are arranged at intervals along the circumference of the filter structure (20). The plurality of support columns (13) together with the base assembly (11) and the top cover assembly (12) form an installation space suitable for accommodating the filter structure (20).

8. A household appliance, characterized in that, The filtration device includes any one of claims 1 to 7.

9. The household appliance according to claim 8, characterized in that, The household appliances include air purifiers.

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