Dust collecting device and cleaning apparatus

Abstract

The dust collecting device and the cleaning equipment provided by the present disclosure belong to the field of cleaning equipment. The dust collecting device comprises a dust cup, a filter assembly and a rotating member. The dust cup has a receiving space and an air inlet communicating with the receiving space. The filter assembly is arranged in the receiving space and comprises a bracket rotatable around the axis of the dust cup and a filter screen surrounding the outer periphery of the bracket. The rotating member is connected with the bracket, and the outer periphery of the rotating member is provided with a fan blade. The fan blade is configured to generate driving force under the action of airflow entering the receiving space through the air inlet, so as to drive the rotating member and the bracket to rotate around the axis of the dust cup, so that the filter screen is passively rotated with the bracket in the receiving space. The dust collecting device and the cleaning equipment provided by the present disclosure can reduce the tangential velocity of fibrous impurities such as hair relative to the surface of the filter screen, inhibit the hair winding phenomenon and improve the user experience.

Description

Technical Field

[0001] This disclosure belongs to the field of cleaning equipment technology, specifically relating to a dust collection device and cleaning equipment. Background Technology

[0002] Vacuum cleaners, widely used in homes, offices, and industrial environments, have become an indispensable tool in modern life. Their basic working principle involves a built-in motor driving a fan to generate negative pressure airflow, sucking dust, hair, lint, fibers, and other fine impurities from floors, carpets, furniture surfaces, or other areas into the device. These impurities are then collected, separated, and filtered inside the device for efficient cleaning before the purified airflow is discharged.

[0003] In mainstream vacuum cleaners, the dust cup collection structure is one of the core components. This structure uses a hollow cup as the main container, forming a closed storage space inside for temporarily storing sucked-in debris. The cup usually has an air inlet connected to the external environment. When the motor generates negative pressure, the airflow carrying impurities enters the storage space through the air inlet. A filter assembly is further installed inside the cup to effectively separate dust from the airflow. This filter assembly typically includes a filter screen capable of intercepting large particles. Utility Model Content

[0004] In some cleaning scenarios, long, filamentous hairs, fine threads, and fibrous strands make up a significant portion of the composition. These high aspect ratio debris easily adhere to and entangle on the filter surface under the combined effects of airflow and wall shearing. Because the filter surface of conventional filter components is prone to initial entanglement, subsequent hairs and fibers will continue to roll along the existing adhesion direction, causing the filter pores to become clogged, reducing the flow area, increasing the pressure drop within the dust cup, and significantly reducing the vacuum cleaner's suction power and actual cleaning efficiency.

[0005] The purpose of this disclosure is to provide a dust collection device and cleaning equipment that can reduce the risk of hair, lint, or fibrous material getting tangled in the filter screen.

[0006] To achieve the above objectives, the technical solution provided in this disclosure is as follows:

[0007] In a first aspect, this disclosure provides a dust collection device, comprising a dust cup, a filter assembly, and a rotating component. The dust cup has a receiving space and an air inlet communicating with the receiving space. The filter assembly is disposed within the receiving space and includes a support rotatable about the axis of the dust cup and a filter screen surrounding the support. The rotating component is connected to the support, and fan blades are provided on the outer periphery of the rotating component. The fan blades are configured to generate a driving force under the action of airflow entering the receiving space through the air inlet, thereby driving the rotating component and the support to rotate about the axis of the dust cup, so that the filter screen passively rotates with the support within the receiving space. By using airflow to drive the fan blades to passively rotate the support / filter screen coaxially, the snagging and entanglement of hair and other fibers on the filter surface is reduced, thus reducing maintenance difficulty.

[0008] In one or more embodiments, the dust collection device further includes a cyclone separation assembly disposed within the receiving space and fixedly connected to the dust cup. The cyclone separation assembly includes a cyclone cone and a mounting base. The mounting base is located inside the filter screen and rotatably connected to the support, allowing the support to rotate relative to the mounting base about the dust cup axis. The cyclone cone and mounting base are positioned inside the filter screen and can rotate relative to the support, balancing a stable cyclone separation field with the rotational freedom of the filter screen.

[0009] In one or more embodiments, the cyclone separator includes a cover fixedly connected to the dust cup. The outer wall of the cover is provided with a spiral duct extending downwards around the dust cup axis. The air inlet is positioned corresponding to the starting point of the spiral duct, so that the incoming airflow forms a spiral airflow around the dust cup axis within the receiving space. This spiral airflow has a circumferential velocity and acts on the fan blades. The spiral duct on the outer side of the cover causes the incoming airflow to form a rotating airflow with a circumferential velocity, which can efficiently act on the fan blades, improving aerodynamic torque conversion efficiency and drive stability.

[0010] In one or more embodiments, the fan blades include a plurality of blades arranged circumferentially along the rotating member, the windward surfaces of the blades being configured to convert the momentum of the spiral airflow into torque that rotates the rotating member, and the angle between the windward surfaces of the blades and the extension direction of the spiral duct being 80° to 100°. This 80° to 100° orientation of the windward surfaces of the blades and the extension direction of the duct reduces skid slip and losses, and improves torque output.

[0011] In one or more embodiments, the bracket includes a bearing housing with a first bearing arranged axially along the dust cup; the mounting base has a flange arranged axially along the dust cup and cooperating with the first bearing, the flange being rotatably connected to the bearing housing via the first bearing. The rotatable engagement of the bearing housing, the first bearing, and the flange provides coaxial, low-friction support, reducing the swing and runout of the bracket rotation.

[0012] In one or more embodiments, a sealing ring is provided on the outer periphery of the bearing housing. The sealing ring includes a main body and a sealing lip extending from the main body towards the bottom surface of the mounting base. The main body is sealed against the outer peripheral surface of the bearing housing, and the sealing lip abuts against the bottom surface of the mounting base. The outer peripheral sealing ring of the bearing housing can prevent dust-laden airflow from entering the bearing area, extend the bearing life, and maintain smooth rotation.

[0013] In one or more embodiments, the mounting base includes a first pipe communicating with the outlet of the cyclone cone; the bracket includes a second pipe communicating with the first pipe, the second pipe being sleeved on the inner side of the flange; the rotating component includes a dust collection bin communicating with the second pipe; the first pipe, the second pipe, and the dust collection bin are arranged sequentially along the axial direction of the dust cup. The sequential arrangement of the first pipe, the second pipe, and the dust collection bin along the axial direction forms a multi-stage dust collection path, ensuring that the dust separated by the cyclone is smoothly guided into the dust collection bin, optimizing separation efficiency and facilitating centralized collection.

[0014] In one or more embodiments, the bottom of the dust collection bin is provided with a dust discharge port, and the dust discharge port is provided with a one-way cover that can be opened outward. The one-way cover has a connecting end fixed to the inner wall of the dust discharge port and a free end that can be flipped relative to the connecting end. The one-way cover has a thinned portion near the connecting end, so that the free end can be flipped relative to the thinned portion to open or close the dust discharge port. The thinned portion of the one-way cover features a flexible hinge design, enabling the free end to flip open in one direction, facilitating the user's emptying of dust and preventing backflow and leakage.

[0015] In one or more embodiments, the second pipe has a connecting portion extending axially toward the first pipe along the dust cup, and the top wall of the mounting base has a mating portion extending axially toward the connecting portion along the dust cup. The connecting portion and the mating portion are rotatably connected by a second bearing. The second bearing rotatably connects the connecting portion of the second pipe to the mating portion of the mounting base, forming a double support node with the first bearing, ensuring the stability and anti-sway capability of the relative rotation of the mounting base and the bracket.

[0016] In one or more embodiments, the bottom of the bracket extends axially towards the rotating component along the dust cup to form a skirt. The skirt has a groove that mates with the rotating component, and the rotating component has a protrusion that adapts to the groove. The bracket and the rotating component are detachably connected via the groove and the protrusion. The detachable connection between the skirt groove and the rotating component protrusion allows for quick assembly and disassembly, facilitating cleaning and maintenance.

[0017] In one or more embodiments, the groove includes an insert portion extending axially along at least a portion of the skirt and a fitting portion extending circumferentially along at least a portion of the skirt from one side of the insert portion. A limiting portion is formed between the fitting portion and the end face of the skirt to restrict axial displacement of the rotating member relative to the bracket. The bay-shaped path and limiting portion design of the groove insert portion and fitting portion effectively limit axial displacement after assembly guidance and circumferential locking, preventing movement.

[0018] In one or more embodiments, the fitting portion includes a retaining portion protruding from the bottom surface of the groove, and the protrusion has a recess corresponding to the retaining portion. The retaining portion and the recess engage with each other to restrict the relative rotation of the bracket and the rotating member. The engagement between the retaining portion and the protrusion recess in the fitting portion provides circumferential positioning and anti-loosening and anti-rotation capabilities, stabilizing torque transmission.

[0019] In one or more embodiments, a sealing gasket is provided between the rotating component and the support. The sealing gasket is compressed and deformed when the rotating component is assembled into the support to seal the gap between the rotating component and the support. The sealing gasket between the rotating component and the support is compressed and formed to seal, cutting off bypass leakage, preventing cyclone short circuits, and maintaining separation efficiency and suction stability.

[0020] Secondly, this disclosure provides a cleaning device including a fan assembly and a dust collection device as described above. The fan assembly and the dust cup form an airflow passage so that the negative pressure generated by the fan assembly drives the airflow entering the receiving space through the air inlet to act on the fan blades of the rotating member, thereby driving the filter screen to rotate within the receiving space.

[0021] The dust collection device and cleaning equipment disclosed herein convert the kinetic energy of the airflow entering the dust cup into a driving force around the axis of the dust cup via fan blades, thereby causing the support and its outer peripheral filter screen to rotate passively. This makes the filter screen aligned with the main airflow direction inside the dust cup, which can reduce the tangential velocity of fibrous debris such as hair relative to the filter screen surface and suppress hair entanglement. In addition, the rotation of the filter screen can generate centrifugal and shearing effects, causing hair to slide or be thrown off and sink with the airflow. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a cross-sectional view of a dust collection device according to an embodiment of the present disclosure;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of the bracket in one embodiment of the present disclosure;

[0026] Figure 4 for Figure 3 A schematic diagram of the support structure from another perspective;

[0027] Figure 5 This is a schematic diagram of the rotating component in one embodiment of the present disclosure;

[0028] Figure 6 for Figure 5 A schematic diagram of the rotating component from another perspective;

[0029] Figure 7 This is a schematic diagram of the structure of the cover in one embodiment of the present disclosure.

[0030] Explanation of key figure labels:

[0031] 1-Dust cup, 11-Containment space, 12-Air inlet, 2-Filter assembly, 21-Bracket, 211-Bearing seat, 212-Second duct, 213-Connecting part, 214-Skirt, 215-Groove, 2151-Embedding part, 2152-Fitting part, 2153-Holding part, 22-Filter screen, 3-Rotating component, 31-Fan blade, 311-Blade, 32-Dust collection bin, 33-Dust outlet, 34-One-way cover, 341 - Connecting end, 342 Free end, 343 Thinning part, 35 Protrusion, 351 Recessed part, 4 Cyclone separation assembly, 41 Cyclone cone, 411 Discharge port, 42 Mounting base, 421 Flange, 422 First pipe, 423 Connecting part, 43 Cover, 44 Spiral air duct, 51 First bearing, 52 Second bearing, 53 Sealing ring, 531 Main body, 532 Sealing lip, 54 Sealing gasket. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0033] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0034] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. In the embodiments shown in this disclosure, directional representations such as up, down, left, right, front, and back are relative and are used to explain the relative structure and movement of different components in this disclosure. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, then these representations are considered to change accordingly.

[0035] In the development of vacuum cleaner technology, the dust cup collection structure has been widely adopted due to its advantages such as convenient maintenance and high visibility. However, as the objects to be cleaned have expanded from hard floors to complex surfaces such as carpets and sofa fabrics, the types of impurity particles carried in the intake airflow have become more diverse, especially the proportion of high aspect ratio impurities such as hair, fine threads, and fibrous fibers has increased significantly.

[0036] Through analysis of the actual usage of existing dust cup vacuum cleaners, the inventors discovered that these fibrous impurities, after entering the dust cup, are easily wrapped around the surface of the filter screen under the dual effects of airflow carrying and wall shearing, and continue to roll along the existing adhesion direction, causing the filter screen pores to be quickly blocked, the flow cross-sectional area to drop sharply, and thus causing problems such as suction power reduction, noise increase and energy consumption increase.

[0037] Based on an in-depth analysis of the above problems, the inventors realized that the root cause of hair entanglement lies in the relative motion between the filter and the incoming airflow. If the filter can be made to move with the airflow during operation, especially to passively rotate in a direction consistent with the main vortex of the airflow, then the relative motion state between the fibers and the filter can be changed (weakening the relative rotation between the fibers and the filter) without the need for an additional independent drive device, thereby reducing the conditions for entanglement.

[0038] Therefore, this disclosure proposes a technical approach to achieve passive rotation of the filter component by utilizing the kinetic energy of the airflow itself. That is, by setting a rotating component that can be impacted by the airflow on the outer periphery of the filter component, the airflow entering the dust cup automatically generates a driving force when it flows through this part, thereby driving the internal filter structure to rotate synchronously, thus achieving the unity of pneumatic drive and anti-entanglement function.

[0039] Specifically, after the airflow is generated by the negative pressure system, a flow field with a rotational component is formed inside the dust cup. The momentum of this flow field is converted into rotational power by the fan blade structure, causing the filter assembly to rotate around the dust cup axis. Through this passive rotation, the filter screen is aligned with the direction of the flow field, the adhesion of long fibers upon contact is weakened, and already attached fibers can detach from the filter surface under centrifugal and shearing action and deposit towards the bottom of the dust cup with the airflow, thus achieving a self-cleaning effect without the need for an additional motor drive.

[0040] Please refer to Figure 1 As shown, a dust collection device in one embodiment of this disclosure includes a dust cup 1, a filter assembly 2, and a rotating component 3; the dust cup 1 has a receiving space 11 and an air inlet 12 communicating with the receiving space 11; the filter assembly 2 is disposed in the receiving space 11, and the filter assembly 2 includes a support 21 that can rotate around the axis of the dust cup and a filter screen 22 surrounding the support 21; the rotating component 3 is connected to the support 21, and a fan blade 31 is provided on the outer periphery of the rotating component 3.

[0041] The fan blade 31 is configured to generate driving force under the action of the airflow entering the receiving space 11 through the air inlet 12, so as to drive the rotating part 3 and the bracket 21 to rotate around the dust cup axis, so that the filter screen 22 is passively rotated with the bracket 21 in the receiving space 11.

[0042] The dust cup 1 serves as the supporting and airflow guiding shell of the overall structure. Its interior encloses a receiving space 11 for collecting and separating debris. The air inlet 12 connects to the external suction pipe and introduces dust-laden airflow into the upstream area of ​​the receiving space 11. The filter assembly 2 is located in the middle or upstream of the receiving space 11. Its core structure includes a support 21 that can rotate around the dust cup axis and a filter screen 22 surrounding the support 21. The support 21 is rotatably connected to the dust cup 1 via a rotational fit. The rotational support can be a bearing, bushing, or an equivalent low-friction support structure to ensure stable, low-resistance rotational movement under pneumatic drive. The filter screen 22 is coaxially sleeved on the outside of the support 21, and the two are fixedly connected, so that when the support 21 rotates around the dust cup axis, the filter screen 22 also rotates synchronously.

[0043] The rotating component 3 is reliably connected to the support 21 in the axial or circumferential direction. The connection method can be a snap-fit, keyway, interference fit, or other mechanical fixing form, so as to transmit the driving torque obtained by the rotating component 3 to the support 21. Fan blades 31 are arranged around the outer periphery of the rotating component 3. The windward surface of the fan blades 31 faces the airflow introduced by the air inlet 12 and formed in the receiving space 11. The geometry of the fan blades 31 is configured to capture the tangential momentum of the airflow. During operation, the airflow generates aerodynamic force on the fan blades 31, thereby forming a driving torque around the dust cup axis on the rotating component 3. This torque is transmitted to the support 21 via the rotating component 3, causing the support 21 and its outer periphery filter screen 22 to passively rotate within the receiving space 11 at a certain angular velocity.

[0044] As a result, the filter screen 22 is no longer stationary, but rotates in the same direction as the main airflow. When the dust-laden airflow containing fibrous debris such as hair, fine threads, or flocculent fibers sweeps across the surface of the filter screen 22, the relative tangential velocity and effective residence time between the fibrous debris and the filter screen are reduced, decreasing the probability of initial snagging and entanglement. At the same time, the rotational motion of the filter screen 22 introduces centrifugal and tangential shearing effects near its outer surface, causing the already snagged fibers to tend to slide along the filter surface and migrate downstream (to the bottom) of the receiving space 11, reducing continuous accumulation on the surface of the filter screen 22.

[0045] In one exemplary embodiment, please refer to Figure 1 As shown, the dust collection device also includes a cyclone separation assembly 4 disposed in the receiving space 11 and fixedly connected to the dust cup 1. The cyclone separation assembly 4 includes a cyclone cone 41 and a mounting base 42. The mounting base 42 is located inside the filter screen 22 and is rotatably connected to the bracket 21 so that the bracket 21 can rotate relative to the mounting base 42 around the axis of the dust cup.

[0046] The cyclone separation assembly 4 in the dust collection device is fixedly connected to the dust cup 1 to establish a stable rotating separation field within the containment space 11. The cyclone separation assembly 4 includes a cyclone cone 41 for forming eddies and radial pressure gradients, and a mounting base 42 for supporting and positioning the cyclone cone 41.

[0047] The mounting base 42 is preferably arranged coaxially along the dust cup axis, and its shape matches the spatial relationship between the inner cavity of the dust cup 1 and the filter assembly 2, so that its whole body is located inside the filter screen 22 and forms an annular flow channel with the filter screen 22. The cone tube part of the cyclone cone 41 is fixed on the mounting base 42, thereby guiding the dust and airflow separated by the cyclone in an orderly manner at the geometric center, ensuring the stability and symmetry of the cyclone core area. The mounting base 42 remains stationary relative to the dust cup 1 and is a rigid reference component of the cyclone separation assembly 4. It can be fixed to the cyclone cone 41 by interference fit, screw connection, snap-fit ​​or other fastening methods.

[0048] To maintain the stability of the cyclone field while providing rotational freedom to the filter assembly 2, a rotational fit is formed between the mounting base 42 and the bracket 21 around the dust cup axis. This rotational fit is achieved through the axially protruding positioning flange 421 on the mounting base 42 and the bearing seat 211 on the bracket 21. A rotational support is arranged in the bearing seat 211 to reduce friction and limit radial and axial runout, allowing the bracket 21 to rotate smoothly around the dust cup axis relative to the mounting base 42.

[0049] Therefore, the mounting base 42 serves to position the cyclone cone 41 and guide the airflow. Simultaneously, as the stationary side of the rotating structure, it provides a rotational reference for the support 21 and its outer peripheral filter screen 22. The support 21, as the movable side of the rotating structure, transmits the driving torque from the rotating component 3 to the filter screen 22, enabling the filtration and separation process to be dynamic within the envelope of a stable cyclone field. The stationary and coaxial arrangement of the mounting base 42 ensures that the flow field center and separation efficiency of the cyclone cone 41 remain undisturbed, while the rotatable arrangement of the support 21 alters the relative motion relationship between fibrous debris and the filter screen 22, suppressing entanglement and promoting the removal of attached fibers from the surface of the filter screen 22.

[0050] Specifically, please refer to Figure 1 and 7 As shown, the cyclone separation assembly 4 includes a cover 43 fixedly connected to the dust cup 1. The outer wall of the cover 43 is provided with a spiral air duct 44 extending downward around the axis of the dust cup. The air inlet 12 is provided at the starting point of the spiral air duct 44 so that the incoming airflow forms a spiral airflow around the axis of the dust cup in the receiving space 11, and the spiral airflow has a circumferential velocity and acts on the fan blade 31.

[0051] The shroud 43 in the cyclone separator assembly 4 is fixedly connected to the dust cup 1. The two are preferably arranged coaxially, so that the shroud 43 serves as the geometric reference and rigid support for establishing a rotating flow field within the containment space 11. The shroud 43 can adopt a bowl-shaped or hemispherical closed shell structure, and is fixedly connected to the upper opening of the dust cup 1 by means of screws, clips, or integral injection molding, forming a sealed connection with the inner wall of the dust cup 1, thereby jointly defining the upper boundary of the containment space 11 and preventing airflow leakage.

[0052] The outer wall of the cover 43 is integrally formed or embedded with a spiral air duct 44, which is a continuous spiral channel. The spiral air duct 44 can perform momentum shaping and direction modulation of the airflow, ensuring that the airflow entering the receiving space 11 has a non-zero circumferential velocity. The centerline of the spiral air duct 44 has both circumferential and axial extension components relative to the dust cup axis, and continuously surrounds the outer wall of the cover 43 from top to bottom, thereby applying a predetermined tangential guidance to the airflow in terms of structure. The air inlet 12 is correspondingly arranged at the starting point of the spiral air duct 44, so that the airflow drawn in from the outside can gain circumferential momentum after entering the receiving space 11 of the dust cup 1, and gradually accumulate a rotational tendency along the spiral air duct 44. The spiral air duct 44 preferably adopts a smooth cross-sectional transition and rounded corner transition in the length direction to suppress boundary layer separation and secondary flow, and reduce friction loss and eddy noise.

[0053] The end region of the spiral duct 44 is tangentially guided to the bottom of the receiving space 11 through the channel formed between the cover 43 and the dust cup 1, so that the airflow has a circumferential velocity component relative to the axis of the dust cup, thereby establishing a rotating airflow field around the axis of the dust cup within the receiving space 11. The resulting rotating airflow directly acts on the fan blade 31 within the receiving space 11. The windward surface of the fan blade 31 obtains a torque around the axis due to the combined action of the tangential momentum of the airflow and the air pressure. This torque is transmitted to the rotatable support 21 through the rotating component 3, so that the filter screen 22 surrounding the support 21 achieves passive synchronous rotation.

[0054] Further, please refer to Figure 1 and 6 As shown, the fan blade 31 includes a plurality of blades 311 arranged circumferentially along the rotating member 3. The windward surface of the blades 311 is configured to convert the momentum of the spiral airflow into the torque that causes the rotating member 3 to rotate. The angle between the windward surface of the blades 311 and the extension direction of the spiral duct 44 (the tangential direction of the center line of the spiral duct 44) is preferably 80° to 100°.

[0055] The fan blades 31 are preferably evenly arranged around the circumference of the rotating member 3. Each blade 311 is arranged around the axis of the dust cup as the center of rotation. The blade root is fixedly connected to the wall of the rotating member 3, and the blade tip faces the rotating airflow field of the receiving space 11, so that the blades 311 are always in the main energy zone of the spiral airflow formed in the receiving space 11. The windward surface of the blades 311 serves as the surface that converts the circumferential momentum and dynamic pressure carried by the spiral airflow into the torque around the axis. It forms an angle of about 80° to 100° with respect to the tangent direction of the center line of the spiral air duct 44. This angle relationship makes the blades 311 approximately positively compressed when impacted by the airflow, reducing the tangential slip and surface escape of the airflow.

[0056] The blade 311 can be connected to the wall of the rotating part 3 by integral injection molding or mechanical fastening. The leading edge and trailing edge of the blade 311 are preferably smoothly transitioned to reduce the additional losses and aerodynamic noise caused by boundary layer separation and vortex shedding; an appropriate radial clearance is maintained between the blade 311 and the inner wall of the housing space 11 to avoid wall interference.

[0057] In one exemplary embodiment, please refer to Figures 1 to 4 As shown, the bracket 21 includes a bearing seat 211, which is provided with a first bearing 51 arranged along the axial direction of the dust cup 1; the mounting base 42 has a flange 421 arranged along the axial direction of the dust cup 1 and cooperating with the first bearing 51, and the flange 421 is rotatably connected to the bearing seat 211 through the first bearing 51.

[0058] The bracket 21 serves as the support frame for the filter assembly 2 and further integrates a bearing housing 211. This bearing housing 211 is a cylindrical or annular embedded structure located near the bottom region of the bracket 21 and is connected to the main body of the bracket 21 via integral molding, threaded fixing, or snap-fit. The bearing housing 211 provides a mounting cavity for the first bearing 51 along the dust cup axis, ensuring that the first bearing 51 is coaxially positioned with respect to the dust cup axis and receives radial and axial rigid support from the bearing housing 211.

[0059] The bottom area of ​​the mounting base 42 is integrally or fixedly provided with a flange 421 extending axially along the dust cup 1, forming an annular protrusion structure. The outer peripheral surface of the flange 421 serves as a rotating mating surface, mating with the inner ring of the first bearing 51. The first bearing 51 enables a low-friction rotational connection between the flange 421 and the bearing housing 211. The coaxial support system of the bearing housing 211, the first bearing 51, and the flange 421 thus constitutes a system that keeps the mounting base 42 stationary, while the bracket 21 rotates smoothly around the dust cup axis under the action of pneumatic torque. The first bearing 51 bears the main radial load and restricts axial movement. The bearing housing 211, through the setting of wall thickness and fit tolerances, ensures the stable positioning and coaxiality of the outer ring of the first bearing 51, avoiding runout caused by loose outer ring or deformation of the seat hole, so that the torque transmitted to the self-rotating component 3 is applied to the bracket 21 with less friction loss.

[0060] Specifically, please refer to Figure 1 and Figure 2 As shown, a sealing ring 53 is provided on the outer periphery of the bearing housing 211. The sealing ring 53 includes a main body 531 and a sealing lip 532 extending from the main body 531 to the bottom surface of the mounting base 42. The main body 531 is sealed and fitted to the outer periphery of the bearing housing 211, and the sealing lip 532 abuts against the bottom surface of the mounting base 42.

[0061] The sealing ring 53 is integrally formed as an elastic annular component, for example, by integral molding of a highly elastic material such as rubber, silicone, or fluororubber. It is embedded in the outer peripheral groove of the bearing housing 211 by pressing, gluing, or retaining ring fixing to form a continuous circumferential closed band. The main body 531 of the sealing ring 53 is used to provide circumferential sealing and positioning of the outer peripheral surface of the bearing housing 211 in the radial direction, ensuring that the sealing component does not rotate, slip, or move axially during assembly and operation. The sealing lip 532 extending from the main body 531 to the bottom surface of the mounting base 42 has an axial cantilever structure, and its end edge elastically abuts against the bottom surface of the mounting base 42 by line contact or narrow surface contact, thereby establishing a static sealing interface between the bearing housing 211 (rotating with the bracket 21) and the mounting base 42 (stationary).

[0062] The main body 531 of the sealing ring 53 performs the functions of follow-up sealing and geometric positioning with the rotating component, while the sealing lip 532 performs the function of relative sliding sealing with the stationary end face. The two form contact pressure after assembly through material elasticity and structural pre-compression to ensure the continuity of the seal. The sealing lip 532 preferably has a smoothly transitioned lip and a micro-chamfer to reduce friction and suppress dust entrainment caused by boundary layer separation; its elastic recovery force can avoid leakage caused by assembly tolerances, thermal expansion and contraction, or long-term vibration. Through the above configuration, an annular barrier is formed between the sealing lip 532 and the bottom surface of the mounting base 42, cutting off the air leakage gap between the outer periphery of the bearing housing 211 and the bottom surface of the mounting base 42, reducing the probability of dust-laden gas migrating into the bearing cavity, and preventing dust from entering the first bearing 51.

[0063] In one exemplary embodiment, please refer to Figure 1 As shown, the mounting base 42 includes a first pipe 422 communicating with the outlet 411 of the cyclone cone 41; the bracket 21 includes a second pipe 212 communicating with the first pipe 422, and the second pipe 212 is sleeved on the inner side of the flange 421; the rotating component 3 includes a dust collection bin 32 communicating with the second pipe 212; the first pipe 422 is arranged sequentially along the axial direction of the dust cup 1 so that the dust discharged from the cyclone cone 41 can enter the dust collection bin 32 sequentially through the first pipe 422 and the second pipe 212.

[0064] The inner cavity of the mounting base 42 forms a first pipe 422, which is connected to the outlet 411 of the cyclone cone 41 and arranged with the dust cup axis as the geometric reference. It is used to discharge the dust after cyclone separation and avoid secondary eddies and backflow in the near-wall area of ​​the outlet 411. A second pipe 212 is provided on the side of the bracket 21. The second pipe 212 is coaxially sleeved in the inner space of the flange 421 of the mounting base 42 and is connected to the end of the first pipe 422. Since the mounting base 42 and its flange 421 are in a stationary state, while the bracket 21 and its second pipe 212 are arranged to rotate around the axis with the rotating component 3, the two preferably adopt a coaxially stacked annular gap structure or an annular seal / labyrinth micro-gap at the docking interface to achieve a low-leakage, low-friction rotational fit relationship, while maintaining good concentricity to ensure that the docking section does not wear under rotational conditions.

[0065] The rotating component 3 is connected to the second pipe 212 at its downstream axial end, and the outlet of the second pipe 212 communicates with the dust collection bin 32 inside the rotating component 3. The dust collection bin 32 is preferably configured as a barrel-shaped container with an open upper end, and its opening edge can be fixedly connected to the lower end of the support 21 via threads, snaps, or a concave-convex structure to form a closed collection chamber. The first pipe 422, the second pipe 212, and the dust collection bin 32 are arranged sequentially along the axial direction of the dust cup 1, forming a collection path where the cyclone cone 41 outlet 411, the first pipe 422, the second pipe 212, and the dust collection bin 32 are arranged sequentially along the axial direction of the dust cup 1. This collection path, through an axially straight guide channel, migrates the dust separated by the cyclone to the collection chamber of the dust collection bin 32, reducing radial backflow and wall re-entrapment opportunities.

[0066] Specifically, please refer to Figure 1 and 6 As shown, the bottom of the dust collection bin 32 is provided with a dust discharge port 33. The dust discharge port 33 is provided with a one-way cover 34 that can be opened to the outside of the dust discharge port 33. The one-way cover 34 has a connecting end 341 fixed to the inner wall of the dust discharge port 33 and a free end 342 that can be flipped relative to the connecting end 341. The one-way cover 34 is provided with a thinning part 343 near the connecting end 341 so that the free end 342 can be flipped relative to the thinning part 343 to open or close the dust discharge port 33.

[0067] The dust collection bin 32 has a dust discharge port 33 at its bottom, and a one-way cover 34 is provided at the dust discharge port 33. The one-way cover 34 is fixed to the inner wall of the dust discharge port 33 by its connecting end 341, preferably fitting and positioning it against the annular step or positioning rib of the dust discharge port 33, so that the axis of the one-way cover 34 is coaxial or nearly coaxial with the axis of the dust discharge port 33. The free end 342 of the one-way cover 34 can be flipped open facing the outside of the dust discharge port 33. The area near the connecting end 341 is provided with a partially thinned part 343, which forms a flexible hinge segment, so that the one-way cover 34 can achieve opening and closing cycles by material rebound without an independent spring.

[0068] To ensure both sealing and guidance, the edge of the dust outlet 33 can be equipped with an annular sealing seat or a slight chamfer, and the contact surface of the free end 342 of the one-way cover 34 can form an annular lip or an arched transition surface, forming a stable surface contact or line contact sealing band at the edge when closed. The fixed connection between the one-way cover 34 and the inner wall can be achieved by integral injection molding, insert riveting, or mechanical fastening to obtain sufficient tensile and torsional strength.

[0069] The one-way cover 34 works in conjunction with the pressure difference inside and outside the dust collection bucket 32 ​​and the material's resilience. The negative pressure inside the dust collection bucket 32 ​​acts on the cover, causing the free end 342 to be pressed towards the edge of the opening to form a self-closing state, blocking the bypass leakage of dust-laden gas through the dust discharge port 33, and avoiding the impact of short-circuit airflow on the cyclone separation efficiency. When emptying dust or performing maintenance, the operator flips the one-way cover 34 outward toward the dust discharge port 33. Gravity and the local static pressure generated by the accumulation of dust inside the bucket cause the free end 342 to flip outward past the thinning part 343, forming a discharge channel, and the dust can be smoothly discharged under its own weight.

[0070] Further, please refer to Figure 1 As shown, the second pipe 212 is provided with a connecting part 213 extending axially along the dust cup 1 toward the first pipe 422, and the top wall of the mounting base 42 has a docking part 423 extending axially along the dust cup 1 toward the connecting part 213. The connecting part 213 and the docking part 423 are rotatably connected by a second bearing 52.

[0071] The connecting part 213 is preferably a coaxial cylindrical or sleeve structure, with its outer or inner circle serving as the mating reference for the rotating structure. The top wall of the mounting base 42 is correspondingly provided with a mating part 423 pointing axially along the dust cup 1 towards the connecting part 213. The mating part 423 is coaxial cylindrical and fits with the connecting part 213 to enclose an axial overlap area. The second bearing 52 is arranged in this overlap area and is preferably a low-friction support such as a ball bearing or needle roller bearing. Its outer ring is fixed to the connecting part 213 on the rotating side, and its inner ring is fixed to the mating part 423 on the stationary side, or the two can be configured in reverse to adapt to specific assembly processes.

[0072] To ensure the reliability of bearing positioning, the mating part 423 and the connecting part 213 can be respectively provided with annular shaft shoulders, snap ring grooves or locking screw rings to achieve axial limiting and pre-tightening of the inner and outer rings; the second bearing 52 is prevented from rotating circumferentially by interference or locating pins, and is limited axially by end face caps or snap rings, so as to establish coaxial rotational fit in the direction of the dust cup axis after assembly.

[0073] The second bearing 52 and the first bearing 51 located below form a double support node distributed vertically along the dust cup axis. The side of the first bearing 51 near the flange 421 of the mounting base 42 bears the main radial load and part of the axial positioning. The side of the second bearing 52 near the top wall of the mounting base 42 works together to share the torque. The two together can effectively reduce the sway of the bracket 21 and the rotating part 3 and improve the smoothness of rotation.

[0074] In one exemplary embodiment, please refer to Figures 1 to 6 As shown, the bottom of the bracket 21 extends axially toward the rotating part 3 along the dust cup 1 to form a skirt 214. The skirt 214 is provided with a groove 215 that cooperates with the rotating part 3. The rotating part 3 is provided with a protrusion 35 that is adapted to the groove 215. The bracket 21 and the rotating part 3 are detachably connected through the groove 215 and the protrusion 35.

[0075] The skirt 214 serves as a load-bearing and positioning component at the lower end of the support 21. Its cylindrical shape defines the assembly area that mates with the rotating component 3 and provides sufficient circumferential length and wall thickness rigidity for the assembly structure. The inner / outer sides or end faces of the skirt 214 are machined with grooves 215 that mate with the rotating component 3. The grooves 215 are arranged circumferentially at a predetermined pitch to form a reliable mechanical engagement relationship with the protrusions 35 provided on the rotating component 3.

[0076] The protrusion 35 and the groove 215 on the rotating part 3 are matched in profile. The relative working surfaces of the two are preferably set as a force-bearing surface with a basic radial direction or a certain slope, so that the axial torque generated by the airflow acting on the fan blade 31 can be efficiently transmitted to the bracket 21 through the side wall of the protrusion 35 and the groove 215, thereby driving the filter screen 22 to rotate stably with the bracket 21.

[0077] To balance ease of disassembly and assembly with reliable operation, the groove 215 can form a composite guiding and limiting structure in the axial and circumferential directions. The axial direction provides the functions of insertion, guidance, and centering, while the circumferential direction provides the functions of locking and anti-rotation. The end face of the skirt 214 and the step of the groove 215 can jointly limit the axial stop and suppress the axial movement of the rotating part 3 under working vibration.

[0078] Specifically, please refer to Figure 4 As shown, the groove 215 includes an insert portion 2151 that extends at least partially axially along the skirt portion 214 and a fitting portion 2152 that extends at least partially circumferentially along the skirt portion 214 from one side of the insert portion 2151. A limiting portion for limiting the axial displacement of the rotating member 3 relative to the bracket 21 is formed between the fitting portion 2152 and the end face of the skirt portion 214.

[0079] The groove 215 is provided in the connection area of ​​the skirt 214. It includes an insert 2151 extending axially along the skirt 214 and a fitting 2152 extending circumferentially from one side of the insert 2151 along the skirt 214. It forms an approximately L-shaped or equivalent zigzag path in space to adapt to the protrusion 35 on the rotating member 3 to realize the sequential actions of insertion, centering and locking.

[0080] The insert 2151 provides guidance in the axial direction, and its cross-section preferably has a guide chamfer or taper, which facilitates positioning at the beginning of assembly and can also mitigate the contact impact between the protrusion 35 and the sidewall of the groove 215 and reduce scratching wear. The width and depth of the insert 2151 define the maximum outline of the protrusion 35, and the mating clearance is controlled within a reasonable tolerance zone in the radial and circumferential directions, respectively, to ensure that the protrusion 35 is radially restricted and circumferentially controllable during the insertion stroke.

[0081] The fitting part 2152 extends circumferentially from the end of the insert part 2151, and its bottom surface and side wall geometrically form a locking cavity. A limiting part is reserved between the cavity and the end face of the skirt part 214. The limiting part can be composed of an end face shoulder, a step, or a shoulder / sloping surface composite structure, which is used to provide axial stop for the protrusion 35 after assembly, thereby limiting the axial displacement of the rotating part 3 relative to the bracket 21.

[0082] During assembly, the operator only needs to axially advance the protrusion 35 along the direction of the insert 2151 to the positioning section, and then rotate it circumferentially at a predetermined angle, causing the protrusion 35 to slide into the fitting part 2152 and form end face contact with the limiting part, thus realizing the transformation from axial introduction to circumferential locking. To improve the locking anti-loosening ability, the fitting part 2152 can be provided with a slight slope or a local arched transition, which will produce a slight wedging effect after the circumferential rotation is completed; shallow grooves or micro-protrusions can also be locally provided on the bottom surface of the fitting part 2152, which will cooperate with the corresponding recesses or arc surfaces on the protrusion 35 to form a micro-clamp to suppress the tendency of rotational uncoupling under vibration. The corners of the groove 215 are preferably rounded to reduce stress concentration and ensure that a stable meshing state and low wear can be maintained even in high-frequency micro-amplitude torsional vibration and dusty environments.

[0083] Further, please refer to Figure 4 and Figure 5 As shown, the fitting part 2152 is provided with a retaining part 2153 protruding from the bottom surface of the groove 215, and the protrusion 35 has a recessed part 351 corresponding to the retaining part 2153. The retaining part 2153 and the recessed part 351 engage with each other to restrict the relative rotation of the bracket 21 and the rotating member 3.

[0084] The bottom surface of the fitting part 2152 is integrally or fixedly provided with a retaining part 2153 that protrudes upward from the bottom surface. The spatial position of the retaining part 2153 is located on the force channel after the protrusion 35 completes axial insertion and rotates circumferentially into the fitting part 2152. Its protruding shape is preferably dome, cone, or rounded ridge to provide a smooth climbing and falling profile during engagement and disengagement, reducing local stress concentration and wear. Correspondingly, the protrusion 35 on the rotating part 3 has a recess 351 on the working surface opposite to the fitting part 2152. The geometric outline of the recess 351 matches the protruding shape of the retaining part 2153, and a stable locking is formed by a small amount of interference or pre-compression deformation.

[0085] During assembly, the protrusion 35 is guided through the insert 2151 and rotated circumferentially into the fitting 2152. The mating surface of the protrusion 35 first makes sliding contact with the upstream slope of the retaining part 2153. With the help of the elasticity of the material and slight deformation, it crosses the highest point and enters the bottom area of ​​the recess 351. The retaining part 2153 and the recess 351 form a surface / line or surface / surface composite contact in this bottom area. If there is a slight reverse torsional vibration during operation, the slope of the retaining part 2153 and the shoulder of the recess 351 provide restoring force and frictional damping to suppress relative rotation.

[0086] The aforementioned engagement relationship constrains the relative rotational freedom between the bracket 21 and the rotating component 3 within the allowable area of ​​the fitting portion 2152. When the applied torque does not reach the set threshold, the protrusion 35 is stably positioned in the recess 351, thereby maintaining the circumferential position and preventing loosening. When maintenance or disassembly is required, applying a reverse torque greater than the threshold will allow the locking portion 2153 to climb up again and disengage from the recess 351, thus releasing the lock.

[0087] In one exemplary embodiment, please refer to Figure 1 and Figure 2 As shown, a sealing gasket 54 is provided between the rotating part 3 and the bracket 21. The sealing gasket 54 is squeezed and deformed when the rotating part 3 is assembled into the bracket 21 to seal the gap between the rotating part 3 and the bracket 21.

[0088] A sealing gasket 54 is provided between the rotating component 3 and the bracket 21, preferably clamped in a coaxial annular manner at the mating parts of their opposing end faces. The sealing gasket 54 can be pre-embedded in an annular receiving groove on the side of the bracket 21 or the side of the rotating component 3, and is circumferentially limited by the flange 421 step or positioning rib to prevent displacement and overturning during assembly and operation. During assembly, as the rotating component 3 completes axial compression relative to the bracket 21 and its end face is fitted by its detachable locking mechanism, the sealing gasket 54 is elastically deformed by controlled compression in the axial direction. The deformed sealing gasket 54 forms a continuous annular sealing band, thereby creating an airtight barrier between the rotating component 3 and the bracket 21.

[0089] The sealing gasket 54 is preferably made of an elastomer with good resilience to ensure stable airtight contact under the conditions of thermal expansion and contraction and slight relative displacement due to vibration. It effectively isolates the air path at the interface of the rotating part 3 and the support 21, cuts off the potential bypass channel from the cyclone area to the filter area, and prevents the airflow from short-circuiting through the interface gap and bypassing the predetermined cyclone separation and guiding path.

[0090] This disclosure also provides a cleaning device, which includes a fan assembly and the aforementioned dust collection device. The fan assembly and the dust cup form an airflow passage so that the negative pressure generated by the fan assembly drives the airflow entering the dust cup receiving space through the air inlet to act on the fan blades of the rotating component, thereby driving the filter screen to rotate within the receiving space.

[0091] The negative pressure generated by the fan assembly draws the dust-laden airflow into the dust cup through the air inlet. The airflow moves along a predetermined path within the containment space and interacts with the fan blades on the outer periphery of the rotating component, converting some of the kinetic energy into torque around the axis of the dust cup. This torque drives the bracket connected to the dust cup to rotate, causing the filter screen surrounding the bracket to rotate passively and coaxially.

[0092] To ensure efficient aeromechanical coupling, the interface between the fan assembly and the dust cup can be sealed with an annular seal, labyrinth groove, or equivalent sealing structure to limit leakage channels and avoid pressure differential attenuation and insufficient rotational driving force caused by bypass short circuits. The installation reference of the fan assembly is set to be coaxial or near coaxial with the axis of the dust cup to reduce abrupt changes in the flow path and local losses.

[0093] In summary, the dust collection device and cleaning equipment provided in this disclosure convert the kinetic energy of the airflow entering the dust cup into a driving force around the dust cup axis via fan blades. This drives the support and its outer peripheral filter to rotate passively, aligning the filter with the main airflow direction within the dust cup. This reduces the tangential velocity of fibrous debris such as hair relative to the filter surface, suppressing hair entanglement. Furthermore, the rotation of the filter generates centrifugal and shear effects, causing hair to slide or be thrown off and sink with the airflow. This solution eliminates the need for an independent motor and complex transmission, resulting in limited energy consumption and noise increases. It also reduces the frequency of filter cleaning, improving the user experience.

[0094] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0095] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dust collection device, characterized in that, include: A dust cup has a receiving space and an air inlet communicating with the receiving space; A filter assembly is disposed within the receiving space, the filter assembly including a bracket rotatable about the dust cup axis and a filter screen surrounding the bracket. A rotating component is connected to the bracket, and the outer periphery of the rotating component is provided with fan blades; The fan blades are configured to generate a driving force under the action of the airflow entering the receiving space through the air inlet, so as to drive the rotating component and the bracket to rotate around the dust cup axis, so that the filter screen passively rotates with the bracket within the receiving space.

2. The dust collection device according to claim 1, characterized in that, The dust collection device further includes a cyclone separation component disposed within the receiving space and fixedly connected to the dust cup. The cyclone separation component includes a cyclone cone and a mounting base. The mounting base is located inside the filter screen and is rotatably connected to the bracket so that the bracket can rotate about the axis of the dust cup relative to the mounting base.

3. The dust collection device according to claim 2, characterized in that, The cyclone separator includes a cover fixedly connected to the dust cup. The outer wall of the cover is provided with a spiral air duct extending downward around the axis of the dust cup. The air inlet is provided at the starting point of the spiral air duct so that the incoming airflow forms a spiral airflow around the axis of the dust cup in the receiving space, and the spiral airflow has a circumferential velocity and acts on the fan blade.

4. The dust collection device according to claim 3, characterized in that, The fan blades include a plurality of blades arranged circumferentially along the rotating member, the windward surface of the blades being configured to convert the momentum of the spiral airflow into torque that causes the rotating member to rotate, and the angle between the windward surface of the blades and the extension direction of the spiral air duct being 80° to 100°.

5. The dust collection device according to claim 2, characterized in that, The bracket includes a bearing housing, the bearing housing having a first bearing arranged axially along the dust cup; the mounting base has a flange arranged axially along the dust cup and cooperating with the first bearing, the flange being rotatably connected to the bearing housing via the first bearing.

6. The dust collection device according to claim 5, characterized in that, The bearing housing is provided with a sealing ring on its outer periphery. The sealing ring includes a main body and a sealing lip extending from the main body to the bottom surface of the mounting base. The main body is sealed and fitted to the outer periphery of the bearing housing, and the sealing lip abuts against the bottom surface of the mounting base.

7. The dust collection device according to claim 5, characterized in that, The mounting base includes a first pipe communicating with the outlet of the cyclone cone; the bracket includes a second pipe communicating with the first pipe, the second pipe being sleeved on the inner side of the flange; the rotating component includes a dust collection bin communicating with the second pipe; the first pipe, the second pipe, and the dust collection bin are arranged sequentially along the axial direction of the dust cup.

8. The dust collection device according to claim 7, characterized in that, The bottom of the dust collection bin is provided with a dust discharge port, and the dust discharge port is provided with a one-way cover that can be opened to the outside of the dust discharge port. The one-way cover has a connecting end fixed to the inner wall of the dust discharge port and a free end that can be flipped relative to the connecting end. The one-way cover is provided with a thinning part near the connecting end so that the free end can be flipped relative to the thinning part to open or close the dust discharge port.

9. The dust collection device according to claim 7, characterized in that, The second pipe is provided with a connecting part extending axially toward the first pipe along the dust cup, and the top wall of the mounting base is provided with a mating part extending axially toward the connecting part along the dust cup. The connecting part and the mating part are rotatably connected by a second bearing.

10. The dust collection device according to claim 1, characterized in that, The bottom of the bracket extends axially toward the rotating component along the dust cup to form a skirt. The skirt is provided with a groove that mates with the rotating component. The rotating component is provided with a protrusion that matches the groove. The bracket and the rotating component are detachably connected through the groove and the protrusion.

11. The dust collection device according to claim 10, characterized in that, The groove includes an insert portion extending axially along at least a portion of the skirt and a fitting portion extending circumferentially along at least a portion of the skirt from one side of the insert portion, wherein a limiting portion is formed between the fitting portion and the end face of the skirt to limit the axial displacement of the rotating member relative to the bracket.

12. The dust collection device according to claim 11, characterized in that, The fitting part is provided with a retaining part that protrudes from the bottom surface of the groove. The protrusion has a recessed part corresponding to the retaining part. The retaining part and the recessed part engage with each other to restrict the relative rotation of the bracket and the rotating part.

13. The dust collection device according to claim 10, characterized in that, A sealing gasket is provided between the rotating component and the bracket. The sealing gasket is squeezed and deformed when the rotating component is assembled into the bracket to seal the gap between the rotating component and the bracket.

14. A cleaning device, characterized in that, Includes a fan assembly and a dust collection device as described in any one of claims 1 to 13, wherein the fan assembly and the dust cup form an airflow passage, so that the negative pressure generated by the fan assembly drives the airflow entering the receiving space through the air inlet to act on the fan blades of the rotating member, thereby driving the filter screen to rotate within the receiving space.

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