Dust collector

Abstract

This application provides a vacuum cleaner with an airflow guiding device that directs airflow sequentially along the dust cup inlet, dust cup chamber, dust cup outlet, main unit inlet, main unit chamber, and main unit outlet. A filter assembly is disposed in the dust cup chamber. A back-blowing device is configured to open or close the back-blowing inlet. When cleaning is required, the dust cup inlet of the main unit housing can be closed, preventing airflow from entering through it. The airflow guiding device directs airflow sequentially along the main unit chamber and main unit outlet, creating a certain degree of negative pressure within the main unit chamber. The back-blowing device can open the back-blowing inlet. Because the main unit chamber is under negative pressure, once the back-blowing inlet is opened, a sudden influx of airflow enters the main unit chamber from the outside. This sudden airflow has a certain impact force, impacting the filter assembly and causing it to beating and removing dust deposited on the filter assembly, thus cleaning it.

Description

Technical Field

[0001] This application relates to the field of home appliance technology, and in particular to vacuum cleaners. Background Technology

[0002] Vacuum cleaners can be categorized by structure into upright, canister, and portable types. The working principle of a vacuum cleaner is that an electric motor drives blades to rotate at high speed, creating negative air pressure within a sealed casing to suck up dust and debris. When a handheld vacuum cleaner is in operation, airflow enters the dust cup through the suction port, then passes through a HEPA filter before entering the motor. However, HEPA filters are prone to dust accumulation; if this accumulated dust blocks the airflow, it will reduce the dust-collecting ability of the handheld vacuum cleaner. Utility Model Content

[0003] Therefore, it is necessary to provide a vacuum cleaner to address the aforementioned technical problems.

[0004] This application provides a vacuum cleaner, the vacuum cleaner comprising:

[0005] The main unit housing has a main unit chamber and a main unit inlet, a main unit outlet and a backflush inlet communicating with the main unit chamber; the main unit housing is provided with a handheld part;

[0006] A dust cup is disposed in the main unit housing. The dust cup has a dust cup chamber and a dust cup inlet and a dust cup outlet communicating with the dust cup chamber. The dust cup outlet is communicating with the main unit inlet.

[0007] An airflow guiding device is disposed in the main housing, located between the dust cup and the handheld part, and at least partially overlaps with the dust cup in the direction from the dust cup to the handheld part; the airflow guiding device is configured to guide airflow sequentially along the direction of the dust cup inlet, the dust cup chamber, the dust cup outlet, the main housing inlet, the main housing chamber, and the main housing outlet;

[0008] A filter assembly is disposed in the dust cup chamber;

[0009] A power source, which is connected to the flow guiding device;

[0010] A backflush device is disposed in the main unit chamber and configured to open or close the backflush inlet.

[0011] In one embodiment, the backflush device includes a cam assembly comprising a cam drive and a cam follower that drive each other, with a cam interface between the cam drive and the cam follower for driving each other, the cam drive and the cam follower opening or closing the backflush inlet by driving the cam interface.

[0012] In one embodiment, the cam follower is configured as a driven piston, which is movably mounted in the main unit chamber;

[0013] A driver, the output of which engages with the driven piston, the driver being configured to drive the driven piston to open or close the backflush inlet.

[0014] In one embodiment, the backflush device includes:

[0015] An assembly base shell is disposed in the main unit chamber. The assembly base shell has a fluid channel, and the backflush inlet communicates with the main unit chamber through the fluid channel.

[0016] The actuator is disposed on the assembly base housing and is configured to drive the driven piston to open or close the fluid passage of the assembly base housing, thereby indirectly opening or closing the backflush inlet.

[0017] In one embodiment, the cam actuator is configured to drive a piston located at the output of the driver, the driver being configured to engage with the driven piston via the drive piston.

[0018] In one embodiment, the driving piston is provided with a driving part, the driving part having a driving inclined surface and a driving vertical surface, the driving inclined surface being connected to the driving vertical surface;

[0019] The driven piston is provided with a driven part, the driven part having a driven inclined surface and a driven vertical surface, the driven inclined surface being connected to the driven vertical surface;

[0020] The driving ramp of the driving part is configured to engage with the driven ramp of the driven part to drive the driven piston to move in a direction away from the fluid channel, thereby opening the fluid channel.

[0021] In one embodiment, the driving part is disposed on the end face of the driving piston, and both the driving ramp and the driving vertical surface are connected to the end face of the driving piston. The driven part is disposed on the end face of the driven piston, and both the driven ramp and the driven vertical surface are connected to the end face of the driven piston. Both the end faces of the driving piston and the end faces of the driven piston are configured as annular end faces; and / or,

[0022] The driven piston is elastically mounted in the main unit chamber via an elastic element, the elastic element being configured to elastically drive the driven piston to move along a direction close to the fluid passage, thereby closing the fluid passage; and / or,

[0023] At least one of the assembly base and the driven piston is provided with a sealing element, the driven piston being in a sealing engagement with the fluid passage through the sealing element, thereby sealing and closing the fluid passage; and / or

[0024] The driver is configured as a stepper motor; and / or,

[0025] The driving ramp is configured as a curved surface, and the driven ramp is configured as a curved surface.

[0026] In one embodiment, during a 360° cycle of mutual driving and engagement of the cam actuator and the cam follower via the cam interface, the backflushing inlet opens or closes at least once; and / or,

[0027] During the mutual driving and engagement of the cam drive member and the cam follower member through the cam interface, energy is stored in the gap except when the backflush inlet is open or closed; and / or,

[0028] The driving part and the driven part are arranged symmetrically to each other in the circumferential direction.

[0029] In one embodiment, the vacuum cleaner includes:

[0030] A detection component is connected to the backflush device and is configured to acquire control status data of the backflush device, the control status data including the control status of opening or closing the backflush inlet.

[0031] In one embodiment, the detection component is connected to at least one of the drive piston and the driven piston, and the control state data includes the drive engagement state between the drive piston and the driven piston.

[0032] In one embodiment, the detection component includes:

[0033] Detectable component, the detectable component being disposed on the drive piston;

[0034] A sensing component is disposed on the driven piston and configured to detect magnetic data information of the detectable component, thereby obtaining control state data of the backflush device based on the magnetic data information.

[0035] In one embodiment, the sensing component is configured to detect the driving engagement state between the driving ramp and the driven ramp based on the magnetic data information, thereby obtaining control state data of the backflush device.

[0036] In one embodiment, the sensing component is disposed on the end face of the driving piston, and the detectable component is disposed on the end face of the driven piston; and / or,

[0037] When the driving piston and the driven piston are in their initial positions, the distance between the detectable component and the sensing component has a unique value Da.

[0038] In one embodiment, the sensing element has a gap with the driving part along the circumferential direction of the driving piston; and / or,

[0039] The detectable component has a gap with the driven part along the circumferential direction of the driven piston.

[0040] In one embodiment, a first mounting groove is formed on the end face of the drive piston, and the sensing component is disposed in the first mounting groove; and / or,

[0041] The driven piston has a second mounting groove on its end face, and the detectable component is disposed in the second mounting groove.

[0042] In one embodiment, a cyclone is provided in the dust cup chamber of the dust cup, and a through dust collection channel is opened inside the cyclone, and a filter assembly is installed in the dust collection channel of the cyclone.

[0043] The outer wall of the cyclone is provided with air guide fins, and the cyclone is assembled and connected to the inner wall of the dust cup chamber through the air guide fins. There is a channel inlet between the air guide fins and the inner wall of the dust cup chamber, and the channel inlet connects the dust cup inlet and the dust collection channel.

[0044] The main unit inlet is connected to the ash collection channel of the cyclone.

[0045] In one embodiment, the dust cup is detachably disposed on the main unit housing; and / or,

[0046] The backflush inlet is configured as a grid-like window in the main housing; and / or,

[0047] The dust cup inlet is connected to a suction pipe; and / or

[0048] The main unit outlet is connected to an air outlet duct, and the air guide device is connected to the air outlet duct.

[0049] In one embodiment, the vacuum cleaner includes:

[0050] A shielding assembly disposed in the dust cup and configured to open or close the dust cup inlet.

[0051] In one embodiment, the shielding assembly is electrically connected to the flow guiding device and the backflushing device, and the shielding assembly is configured to activate the flow guiding device and the backflushing device when the dust cup inlet is closed.

[0052] In one embodiment, the occlusion component includes:

[0053] A baffle plate, which is rotatably mounted on the dust cup;

[0054] A torsion spring is connected between the dust cup and the baffle plate, and the torsion spring is configured to elastically control the baffle plate to open the dust cup inlet.

[0055] In one embodiment, the occlusion component includes:

[0056] A microswitch is electrically connected to the flow guiding device and the backflushing device, and the microswitch is configured to control the flow guiding device and the flow guiding device to turn on;

[0057] A control button is movably disposed in the dust cup. The control button has a first control part and a second control part. The first control part is driven to cooperate with the baffle plate to drive the baffle plate to close the dust cup inlet. The second control part is driven to cooperate with the micro switch to press the micro switch.

[0058] In one embodiment, the actuator is configured to stop moving when the drive piston returns to its initial position and the microswitch is disconnected.

[0059] In one embodiment, the backflush device includes:

[0060] A rotating gear, wherein the rotating gear is provided with a drive gear set and a drive gear section, and the drive gear set includes a plurality of unit teeth continuously arranged along the rotation direction of the rotating gear;

[0061] A drive motor, the output end of which is connected to the rotating gear drive;

[0062] An opening and closing rocker is movably mounted in the main unit chamber. The opening and closing rocker is configured to open or close the backflush inlet. A plurality of unit teeth of the drive gear assembly are configured to engage with the opening and closing rocker. Each unit tooth is configured to drive the opening and closing rocker to open the backflush inlet once.

[0063] A suction baffle is movably mounted on the dust cup and configured to open or close the dust cup inlet. The drive teeth of the rotating gear are configured to engage with the suction baffle to drive the suction baffle to close the dust cup inlet.

[0064] In one embodiment, the drive gear assembly includes three unit teeth, which are configured as plate-like structures.

[0065] In one embodiment, the backflush device includes:

[0066] A pushing element is movably mounted on the dust cup and connected to the suction port baffle. The driving teeth of the rotating gear are configured to engage with the pushing element, thereby indirectly driving the suction port baffle to close the dust cup inlet via the pushing element.

[0067] In one embodiment, the backflush device includes:

[0068] A rotating shaft is provided, and the pushing element is rotatably mounted on the dust cup via the fixed axis of the rotating shaft. The pushing element is connected to the suction port baffle via the rotating shaft. The driving teeth of the rotating gear are configured to drive the pushing element to rotate along the fixed axis of the rotating shaft, thereby indirectly driving the suction port baffle to rotate along the fixed axis, and thus closing the dust cup inlet.

[0069] In one embodiment, the filtering component includes:

[0070] Filter support;

[0071] A filter, which is assembled on the filter support;

[0072] A front seal, which is assembled on the front side of the filter bracket;

[0073] A rear seal is fitted to the rear side of the filter bracket.

[0074] In one embodiment, the filter holder includes:

[0075] Frame;

[0076] A handle, which is fitted onto the frame.

[0077] The fixing part is configured to be a plurality of fixing parts, and the plurality of fixing parts are disposed on the side wall of the frame part along the circumference of the frame part;

[0078] The number of support bars is configured to be several, and several support bars are assembled on the frame and arranged around the handle.

[0079] In one embodiment, the filter assembly is disposed within the dust cup, with the upstream end of the filter connected to the dust cup chamber and the downstream end connected to the main unit inlet; and / or,

[0080] The filter is disposed on the main unit housing, with its upstream end connected to the main unit inlet and its downstream end connected to the main unit outlet; and / or,

[0081] The filter is disposed between the dust cup and the main unit housing, with the upstream end of the filter connected to the dust cup outlet and the downstream end connected to the main unit inlet; and / or,

[0082] The dust cup and the main unit housing are each provided with an electrical coupler, and the dust cup and the main unit housing are detachably connected in communication via the two electrical couplers.

[0083] This application provides a vacuum cleaner, the vacuum cleaner comprising:

[0084] The main unit housing has a main unit chamber and a main unit inlet, a main unit outlet and a backflush inlet communicating with the main unit chamber; the main unit housing is provided with a handheld part;

[0085] A dust cup is disposed in the main unit housing. The dust cup has a dust cup chamber and a dust cup inlet and a dust cup outlet communicating with the dust cup chamber. The dust cup outlet is communicating with the main unit inlet.

[0086] A flow guiding device is disposed on the handheld part and configured to guide airflow sequentially along the direction of the dust cup inlet, the dust cup chamber, the dust cup outlet, the main unit inlet, the main unit chamber, and the main unit outlet;

[0087] A filter assembly is disposed in the dust cup chamber;

[0088] A power source is disposed on the handheld part and is connected to the flow guiding device;

[0089] A backflush device is disposed in the main unit chamber and is configured to open or close the backflush inlet.

[0090] In one embodiment, the flow guiding device is disposed on the upper side of the handheld portion; and / or,

[0091] The power source is located at the lower end of the handheld part.

[0092] In the aforementioned vacuum cleaner, when cleaning is required, the dust cup inlet of the main unit housing can be closed, preventing airflow from entering through it. At this time, the airflow guide activates, directing the airflow sequentially along the main unit chamber and outlet, creating a certain degree of negative pressure within the chamber. In this state, the back-blowing device opens the back-blowing inlet. Because the main unit chamber is under negative pressure, once the back-blowing inlet is opened, a sudden influx of airflow enters the chamber from the outside. This sudden airflow has a certain impact force, impacting the filter assembly and causing it to beating and removing accumulated dust, thus cleaning the filter assembly. Attached Figure Description

[0093] Figure 1 This is a partial plan sectional view of a vacuum cleaner provided in one embodiment of this application.

[0094] Figure 2 For example Figure 1 The diagram shows a partially enlarged view of the vacuum cleaner.

[0095] Figure 3 This is a partial perspective sectional view of a vacuum cleaner in normal working condition according to an embodiment of this application.

[0096] Figure 4 For example Figure 3 The diagram shows a first enlarged partial view of the vacuum cleaner.

[0097] Figure 5 For example Figure 3 The second enlarged schematic diagram of the vacuum cleaner shown.

[0098] Figure 6 This is a perspective view of a vacuum cleaner in normal working condition according to an embodiment of this application.

[0099] Figure 7 This is a partial planar cross-sectional view of a vacuum cleaner in its self-cleaning state, provided in one embodiment of this application.

[0100] Figure 8 For example Figure 7 The diagram shows a partially enlarged view of the vacuum cleaner.

[0101] Figure 9This is a perspective view of a vacuum cleaner in a self-cleaning state according to an embodiment of this application.

[0102] Figure 10 A perspective view of a driven piston provided in one embodiment of this application.

[0103] Figure 11 This is a perspective view of a drive piston provided in one embodiment of this application.

[0104] Figure 12 This is an exploded view of a backflush device provided in one embodiment of this application.

[0105] Figure 13 This is an exploded view from another angle of the backflush device provided in one embodiment of this application.

[0106] Figure 14 This is a perspective view of a vacuum cleaner in a self-cleaning state according to an embodiment of this application.

[0107] Figure 15 This is a perspective view of a cyclone provided in one embodiment of this application.

[0108] Figure 16 This is a perspective view of a shielding component provided in one embodiment of this application.

[0109] Figure 17a This is a partial enlarged view of the vacuum cleaner back-blowing device in its initial position, according to an embodiment of this application.

[0110] Figure 17b A simplified diagram of the driving piston, driven piston, Hall element, and magnetic element in their initial positions, provided for one embodiment of this application.

[0111] Figure 18a This is a partial enlarged view of a vacuum cleaner back-blowing device provided in one embodiment of this application during its movement from an initial position to a limit position.

[0112] Figure 18b This is a simplified diagram of a drive piston, driven piston, Hall element, and magnetic element provided in one embodiment of this application during the process of moving from an initial position to a limit position.

[0113] Figure 19a This is a partial enlarged view of the vacuum cleaner back-blowing device in its extreme position according to an embodiment of this application.

[0114] Figure 19b A simplified diagram of the drive piston, driven piston, Hall element, and magnetic element at extreme positions, provided for one embodiment of this application.

[0115] Figure 20 A first-view perspective perspective view of a filtering component provided in one embodiment of this application.

[0116] Figure 21 A second-view perspective perspective view of a filtering component provided in one embodiment of this application.

[0117] Figure 22 This is a cross-sectional view of a filtering component provided in one embodiment of this application.

[0118] Figure 23 An exploded view of a filtering component provided in one embodiment of this application.

[0119] Figure 24 This is a schematic diagram of the initial state of the driving piston and the driven piston provided in one embodiment of this application.

[0120] Figure 25 This is a schematic diagram of the downward process state of the driving piston and the driven piston provided in one embodiment of this application.

[0121] Figure 26 This is a schematic diagram of the limit states of the driving piston and the driven piston provided in one embodiment of this application.

[0122] Figure 27 This is a schematic diagram of the upward process of the driving piston and the driven piston according to an embodiment of this application.

[0123] Figure 28 This is a schematic diagram of the engagement state of the driving piston and the driven piston provided in another embodiment of this application.

[0124] Icon labels:

[0125] 1000. Main unit housing; 2000. Dust cup; 3000. Airflow guiding device; 4000. Filter assembly; 5000. Backflushing device; 6000. Cyclone fan; 7000. Shielding assembly; 8000. Detection assembly;

[0126] 1100. Air outlet duct; 1001. Main unit chamber; 1002. Main unit inlet; 1003. Main unit outlet; 1004. Backflush inlet; 1005. Handheld unit; 1006. Power source;

[0127] 2100. Suction pipe; 2001. Dust cup chamber; 2002. Dust cup inlet; 2003. Dust cup outlet;

[0128] 4001, Front surface; 4002, Rear surface; 4100, Filter; 4200, Filter support; 4300, Front seal; 4400, Rear seal; 4210, Frame; 4220, Handle; 4230, Fixing part; 4240, Support bar;

[0129] 5100, Driven piston; 5200, Actuator; 5300, Assembly base; 5400, Drive piston; 5500, Elastic element;

[0130] 5110, Driven part; 5111, Driven inclined surface; 5112, Driven vertical surface; 5120, Limiting groove;

[0131] 5310, fluid channel; 5320, limiting protrusion;

[0132] 5410, Drive unit; 5411, Drive inclined surface; 5412, Drive vertical surface; 5420, Shaft fixing unit;

[0133] 6100, Ash collection channel; 6200, Air guide fin; 6300, Channel inlet;

[0134] 7100, baffle plate; 7200, torsion spring; 7300, micro switch; 7400, control button; 7500, first control unit; 7600, second control unit;

[0135] 8100, magnetic element; 8200, Hall element. Detailed Implementation

[0136] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0137] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0138] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0139] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0140] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0141] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If 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. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0142] See Figures 1 to 16 As shown, this application provides a vacuum cleaner. First, refer to... Figure 1 and Figure 2As shown, the vacuum cleaner includes a main unit housing 1000, a dust cup 2000, a flow guiding device 3000, a filter assembly 4000, a power source 1006, and a back-blowing device 5000. The main unit housing 1000 serves as the assembly base for components such as the dust cup 2000, the flow guiding device 3000, the filter assembly 4000, the power source 1006, and the back-blowing device 5000. The main unit housing 1000 can be designed in various structures and shapes, which are not limited here. For example, in one embodiment, the main unit housing 1000 may have a main unit chamber 1001 and a main unit inlet 1002, a main unit outlet 1003, and a back-blowing inlet 1004 communicating with the main unit chamber 1001. The main unit inlet 1002, the main unit outlet 1003, and the back-blowing inlet 1004 can be arranged at any position in the main unit housing 1000 as needed. Components such as dust cup 2000, air guide device 3000, filter assembly 4000, power source 1006, and backflushing device 5000 can also be arranged in any way on the main unit housing 1000. Among them, the main unit outlet 1003 can be connected to the air outlet duct 1100, and the air guide device 3000 is connected to the air outlet duct 1100.

[0143] The vacuum cleaner provided in this application is a handheld vacuum cleaner. Therefore, a handheld part 1005 can be provided on the main housing 1000 as needed. The handheld part 1005 can adopt a rod-shaped handheld structure, and a handheld hole can be formed between the handheld part 1005 and the main housing 1000 to allow the user's hand to reach in and hold it. The handheld part 1005 can be set at an inclined angle for easy gripping by the user. The inclined design of the handheld part 1005 can be based on the arrangement direction of components such as the dust cup 2000, the air guiding device 3000, the filter assembly 4000, the power source 1006, and the back-blowing device 5000. For example, if the dust cup 2000, the filter assembly 4000, and the back-blowing device 5000 are arranged as follows... Figure 1 When the direction shown is arranged vertically in a straight line, the tilt direction of the handheld part 1005 is based on the vertical straight line arrangement direction of the dust cup 2000, the filter assembly 4000 and the back-blowing device 5000. The tilt angle can be designed to be between 85° and 140°. Those skilled in the art can design it according to actual needs, and it is not limited here.

[0144] Continue reading Figure 1 and Figure 2As shown, the dust cup 2000 is disposed on the main unit housing 1000. For example, the dust cup 2000 is detachably disposed on the main unit housing 1000, and the detachable assembly method facilitates the removal and cleaning of the dust cup 2000. The dust cup 2000 has a dust cup chamber 2001 and a dust cup inlet 2002 and a dust cup outlet 2003 communicating with the dust cup chamber 2001. The dust cup outlet 2003 communicates with the main unit inlet 1002. The dust cup inlet 2002 and the dust cup outlet 2003 can be set at any position of the dust cup 2000 as needed. The dust cup inlet 2002 can be connected to a suction pipe 2100. The length of the suction pipe 2100 can be set according to the suction needs. It mainly utilizes the suction pipe 2100 to contact the ground and other areas that need to be cleaned to suck up dust.

[0145] The flow guiding device 3000 can be disposed in the main housing 1000, and the flow guiding device 3000 is located between the dust cup 2000 and the handheld part 1005. In the direction from the dust cup 2000 to the handheld part 1005, the flow guiding device 3000 can at least partially overlap with the dust cup 2000 in projection, such that the dust cup 2000, the flow guiding device 3000, and the handheld part 1005 are in a relatively harmonious arrangement. Figure 1 The horizontal arrangement shown is designed to be suitable for handheld vacuum cleaners.

[0146] The power source 1006 is connected to the airflow guide 3000, primarily serving to provide power. Refer to [link / reference] when the vacuum cleaner is in normal operating condition. Figures 3 to 6 As shown, the dust cup inlet 2002 is in the open state. The flow guiding device 3000 can be a fan of various models, mainly serving to guide the airflow in a preset direction. For example, the flow guiding device 3000 can be configured to guide the airflow to flow sequentially along the direction of the dust cup inlet 2002, the dust cup chamber 2001, the dust cup outlet 2003, the main unit inlet 1002, the main unit chamber 1001, and the main unit outlet 1003, thereby achieving the dust suction effect. The dust also flows sequentially along the direction of the dust cup inlet 2002, the dust cup chamber 2001, and the dust cup outlet 2003. The filter assembly 4000 is set in the dust cup chamber 2001. When the dust passes through the filter assembly 4000, it can be trapped.

[0147] The filter assembly 4000 can adopt various different structural designs, as long as it meets the assembly and filtration functions in the vacuum cleaner; no limitation is made here. In one embodiment, please refer to [further details omitted]. Figures 20 to 23As shown, the filter assembly 4000 may include a filter 4100, a filter support 4200, a front seal 4300, and a rear seal 4400. The filter 4100 is disposed on the filter support 4200, and the filter support 4200 holds the filter 4100 in place. The filter support 4200 has a frame portion 4210, a handle 4220, a fixing portion 4230, and a support bar 4240. The frame portion 4210 is disposed around the filter 4100, the support bar 4240 is connected to the frame portion 4210, and the handle 4220 is disposed above the support bar 4240.

[0148] Therefore, the front seal 4300 can be disposed on the outer periphery of the frame portion 4210, and the front seal 4300 is used to seal against the dust cup chamber 2001 (specifically, the inner wall of the dust cup or the inner wall of the dust collection channel), and the fixing portion 4230 is disposed on the outer periphery of the frame portion 4210. The filter 4100 can be configured as a generally circular structure, the frame portion 4210 can be adapted to the shape of a cylindrical dust cup, and at least three fixing portions 4230 are arranged in an array. The fixing portions 4230 are used to fix the filter against the dust cup chamber 2001 (specifically, the inner wall of the dust cup or the inner wall of the dust collection channel).

[0149] A rear seal 4400 is disposed at one end of the frame 4210 facing the rear surface 4002, and the rear seal 4400 is in a sealing fit with the main housing 1000. At least a portion of the support bar 4240 is disposed in front of the rear surface 4002 of the filter 4100. The support bar 4240 may be designed as a generally mesh-like structure. The support bar 4240 provides support for the frame 4210, ensuring the strength of the filter 4100, and also ensuring that the filter 4100 does not deform under prolonged fluid forces from the front surface 4001 to the rear surface 4002. A handle 1005 protrudes from the support bar 4240, allowing the user to hold the handle 1005 for easy disassembly, replacement, and cleaning of the filter 4100.

[0150] The filter 4100 described above can be of various suitable types or models. For example, in one embodiment, the filter 4100 can be a HEPA filter 4100 (High Efficiency Particulate Air Filter), or other types of filters 4100 can be used, without limitation. The filter 4100 can be defined as having a front surface 4001 and a rear surface 4002. The rear surface 4002 of the filter 4100 is configured in assembly to be adjacent to the main unit inlet 1002, while the front surface 4001 of the filter 4100 faces the opposite direction to the rear surface 4002. When the airflow guiding device 3000 is activated and the vacuum cleaner is in a cleaning state, airflow can flow into the filter 4100 from the front surface 4001. The filter 4100 can be used to recover foreign objects from the airflow (air) flowing into the filter 4100. The airflow (air) passing through filter 4100 can flow out of the rear surface 4002 of filter 4100 and then flow into the main unit inlet 1002.

[0151] Regarding the location of the filter assembly 4000, in one embodiment, the filter 4100 may be optionally located inside the dust cup 2000, such that the upstream of the filter 4100 is connected to the dust cup chamber 2001, and the downstream of the filter 4100 is connected to the main unit inlet 1002.

[0152] In addition, the filter 4100 can also be optionally installed on the main unit housing 1000, with the upstream of the filter 4100 connected to the main unit inlet 1002 and the downstream of the filter 4100 connected to the main unit outlet 1003. Alternatively, the filter 4100 can also be optionally installed between the dust cup 2000 and the main unit housing 1000, with the upstream of the filter 4100 connected to the dust cup outlet 2003 and the downstream of the filter 4100 connected to the main unit inlet 1002.

[0153] Those skilled in the art can set the position of the filter component 4000 in the vacuum cleaner according to actual needs, and no limitation is made here.

[0154] When the handheld vacuum cleaner is working, the airflow enters the dust cup 2000 through the dust cup inlet 2002, and then passes through the filter assembly 4000 before entering the fan. The filter assembly 4000 can use materials with filtering functions, such as HEPA filters. HEPA filters easily accumulate dust, and if the accumulated dust blocks the air duct, it will reduce the dust pickup ability of the handheld vacuum cleaner. Therefore, the vacuum cleaner of this application is equipped with a back-blowing device 5000 and a back-blowing inlet 1004 is designed on the main unit housing 1000. The design of the back-blowing device 5000 and the back-blowing inlet 1004 is adapted to the original vacuum cleaner structure design, so that after the back-blowing device 5000 is installed in the main unit chamber 1001, the back-blowing device 5000 can open or close the back-blowing inlet 1004 as needed to achieve the self-cleaning function of the filter assembly 4000. The back-blowing inlet 1004 can be designed as an inlet with various structures and shapes. For example, the back-blowing inlet 1004 can be configured as a grid-like window opened in the main unit housing 1000.

[0155] When the vacuum cleaner is in self-cleaning mode, refer to Figures 7 to 9 As shown, the dust cup inlet 2002 is in the closed state. Regarding the self-cleaning function mentioned above, when cleaning is required, the dust cup inlet 2002 of the main unit housing 1000 can be closed, preventing airflow from entering through the dust cup inlet 2002. At this time, the airflow guiding device 3000 operates, guiding the airflow sequentially along the direction of the main unit chamber 1001 and the main unit outlet 1003, creating a certain degree of negative pressure within the main unit chamber 1001.

[0156] In this state, the backflush device 5000 can open the backflush inlet 1004. Since the main unit chamber 1001 is under negative pressure, once the backflush inlet 1004 is opened, a stream of air will suddenly enter the main unit chamber 1001 from the outside through the backflush inlet 1004. The airflow will flow from the rear surface 4002 of the filter assembly 4000 to the front surface 4001 of the filter assembly 4000. Because the suddenly entering airflow has a certain impact force, it can impact the filter assembly 4000, causing a certain degree of beating, knocking off the dust deposited on the filter assembly 4000, and cleaning the filter assembly 4000.

[0157] Furthermore, filter components such as HEPA filters 4000 need to trap dust while allowing airflow; therefore, filter components 4000 require a certain degree of air permeability and are made of breathable materials. When the vacuum cleaner is in normal operation, dust is sucked in and adheres to the lower side (front surface) of the filter component 4000, while air passes through the filter component 4000 and enters the airflow guide device 3000. When the back-blowing airflow from the back-blowing inlet 1004 enters, the back-blowing airflow not only beats the filter component 4000, causing it to shake, but also applies airflow from above the filter component 4000. This airflow enters the dust cup chamber 2001 of the dust cup 2000 from above, which also blows off the dust adhering to the filter component 4000, further improving the cleaning effect.

[0158] Regarding the aforementioned backflushing device 5000, the backflushing device 5000 can employ various control methods and structures to open or close the backflushing inlet 1004. For example, in one embodiment, the backflushing device 5000 includes a driven piston 5100 and a driver 5200. The driven piston 5100 is movably mounted in the main unit chamber 1001. The output end of the driver 5200 is driven and engaged with the driven piston 5100. The driver 5200 can be a motor, telescopic cylinder, or other device that can control the movement of the driven piston 5100. For example, the driver 5200 can be configured as a stepper motor, which is not limited here. In this case, the driving force applied by the driver 5200 can be configured to drive the driven piston 5100 to move in the main unit chamber 1001, thereby moving away from or blocking the backflushing inlet 1004, and thus opening or closing the backflushing inlet 1004.

[0159] Continue reading Figure 1 and Figure 2 As shown, in one embodiment, the backflush device 5000 may further include an assembly base 5300, which is disposed in the main unit chamber 1001. The assembly base 5300 serves as the assembly base for other components in the backflush device 5000 within the main unit chamber 1001. Therefore, the actuator 5200 may be disposed in the assembly base 5300. The assembly base 5300 has a fluid channel 5310, through which the backflush inlet 1004 communicates with the main unit chamber 1001. In this state, the actuator 5200 can be configured to drive the driven piston 5100 to open or close the fluid channel 5310 of the assembly base 5300. Since the backflush inlet 1004 communicates with the main unit chamber 1001 via the fluid channel 5310, opening or closing the fluid channel 5310 of the assembly base 5300 is equivalent to indirectly opening or closing the backflush inlet 1004.

[0160] Continue reading Figure 1 and Figure 2As shown, the backflush device 5000 may further include a drive piston 5400, which is disposed at the output end of the driver 5200. The driver 5200 is configured to drive the driven piston 5100 in a cooperative manner via the drive piston 5400. (Continue reading) Figure 10 and Figure 11 As shown, in one embodiment, the drive piston 5400 is provided with a drive part 5410, which has a drive inclined surface 5411 and a drive vertical surface 5412, with the drive inclined surface 5411 connected to the drive vertical surface 5412.

[0161] Correspondingly, the driven piston 5100 is provided with a driven part 5110, which has a driven inclined surface 5111 and a driven vertical surface 5112, with the driven inclined surface 5111 and the driven vertical surface 5112 connected. At this time, the driving inclined surface 5411 of the driving part 5410 can be configured to drive and cooperate with the driven inclined surface 5111 of the driven part 5110. When force is gradually transmitted between different positions of the driving inclined surface 5411 and the driven inclined surface 5111, the driving piston 5400 can thereby drive the driven piston 5100 to move relative to the fluid passage 5310, changing the state of the driven piston 5100 blocking (closing) the fluid passage 5310 to the state of the driven piston 5100 not blocking (opening) the fluid passage 5310.

[0162] The driving ramp 5411 can be configured as a curved surface, and the driven ramp 5111 can be configured as a curved surface. Moreover, at least one of the mounting base 5300 and the driven piston 5100 is provided with a sealing element, and the driven piston 5100 is sealed to the fluid passage 5310 through the sealing element, thereby sealing and closing the fluid passage 5310.

[0163] In one embodiment, the drive piston 5400 may have an end face. Provided that the drive unit 5410 can achieve stable driving, the drive unit 5410 may be fixedly or movably disposed on the end face of the drive piston 5400; no limitation is made here. The drive unit 5410 being disposed on the end face of the drive piston 5400 allows both the drive ramp 5411 and the drive vertical surface 5412 to be connected to the end face of the drive piston 5400.

[0164] Similarly, the driven piston 5100 may have its end face. Provided that the driving unit 5410 can achieve stable driving, the driven part 5110 may be fixedly or movably disposed on the end face of the driven piston 5100, without limitation. The driven part 5110 is disposed on the end face of the driven piston 5100 such that both the driven inclined surface 5111 and the driven vertical surface 5112 are connected to the end face of the driven piston 5100.

[0165] Both the end face of the driving piston 5400 and the end face of the driven piston 5100 can be configured as annular end faces. Therefore, the driving inclined surface 5411 and the driving vertical surface 5412 can be continuously arranged with the end face of the driving piston 5400 in the annular direction, and the driven inclined surface 5111 and the driven vertical surface 5112 can be continuously arranged with the end face of the driven piston 5100 in the annular direction.

[0166] The movement of the driven piston 5100 along the direction close to the fluid channel 5310 can be achieved by active control or passive control. For example, it can be set in an elastic passive mode. In this case, the driven piston 5100 can be elastically mounted in the main chamber 1001 by the elastic element 5500. The elastic element 5500 is configured to elastically drive the driven piston 5100 to move along the direction close to the fluid channel 5310, thereby using the elastic force of the elastic element 5500 to close the fluid channel 5310.

[0167] The elastic element 5500 can be a spring, sheet metal, or other spring, depending on the assembly requirements. For example, when the elastic element 5500 is a spring, a positioning post or positioning groove for fitting the spring can be provided in the main unit chamber 1001. One end of the spring is fitted into the positioning post or positioning groove in the main unit chamber 1001, thereby fixing it in the main unit chamber 1001. Similarly, the driven piston 5100 can also be provided with a positioning post or positioning groove for fitting the spring. The other end of the spring is fitted into the positioning post or positioning groove of the driven piston 5100, thereby fixing it in the driven piston 5100. Those skilled in the art can choose a suitable method to elastically assemble the driven piston 5100 in the main unit chamber 1001 according to actual needs, and no limitation is made here.

[0168] The backflush device 5000 connects the backflush inlet 1004 to the driver 5200 for opening and closing the backflush inlet 1004. Regarding the aforementioned backflush device, the backflush device 5000 may include a cam assembly, for example, the cam assembly may include at least one cam drive and a cam follower. The cam drive may be optionally configured as the aforementioned drive piston 5400, which is coupled to the driver 5200 to rotate about a central axis 5600 with the output end of the driver 5200. The cam follower may be optionally configured as the aforementioned driven piston 5100, which moves up and down along the central axis 5600 via engagement of a cam surface. The function of the backflush inlet 1004 may further depend on the cam interface between the drive piston 5400 and the driven piston 5100.

[0169] Continue reading Figures 24 to 28As shown, the cam interface includes a lower cam surface (i.e., the aforementioned driving portion 5410) on the driving piston 5400 and a corresponding upper cam surface (i.e., the aforementioned driven portion 5110) on the driven piston 5100. The lower cam surface includes a driving inclined surface 5411 and a driving vertical surface 5412, and the lower cam surface includes a driven inclined surface 5111 corresponding to the driving inclined surface 5411 and a driven vertical surface 5112 corresponding to the driving vertical surface 5412. The cam interface is configured to move the driven piston 5100 up and down during rotation.

[0170] Specifically, during the 360° cycle of mutual driving and engagement between the cam drive member and the cam follower through the cam interface, the backflush inlet 1004 opens or closes at least once, for example, once, twice, three times, or other different numbers, which are not limited here. Simultaneously, during the mutual driving and engagement between the cam drive member and the cam follower through the cam interface, the gaps other than when the backflush inlet 1004 is open or closed can be used for energy storage.

[0171] The driving part 5410 and the driven part 5110 are symmetrically arranged in the circumferential direction. For example, the torque can be balanced by rotating the two driven parts 5110 by 180 degrees. The driving vertical surface 5412 and the driven vertical surface 5112 in the cam interface are both vertical surfaces, which can make the cam interface instantly reset, immediately close the backflush inlet, make the dust cup chamber 2001 immediately become negative pressure, and the pressure difference changes rapidly, causing large vibrations.

[0172] In one embodiment, a cam guide may be provided to guide the movement of the driven piston 5100 in a controlled manner. The cam guide may include one or more of the aforementioned limiting grooves 5120 from the driven piston 5100, the limiting grooves being for receiving one or more corresponding limiting protrusions 5320 within the interior of the mounting base housing 5300. The cam surface may include respective cam profiles on the drive piston 5400 and the driven piston 5100. An elastic element 5500 may bias the driven piston 5100 upwards away from the bottom or end of the mounting base housing 5300 to keep the backflush inlet 1004 closed.

[0173] An embodiment of the cam profile in Figure 24 The initial state is shown, and it illustrates how the cam interface is configured to cause the drive piston 5400 to rotate or shift a total of 50 degrees per cycle, each cycle including the downward and upward strokes of the driven piston 5100. It should be noted that... Figures 24 to 28The scale is 10 degrees for each grid frame. The lower cam surface of the drive piston 5400 is offset by 40 degrees from the upper cam surface of the driven piston 5100, and the remaining cam interface is configured such that during the rotational stroke, the driven piston 5100 moves downward, the drive piston 5400 continues to rotate 10 degrees, and the cam interface is configured such that during the remaining stroke, the driven piston 5100 moves upward.

[0174] In some embodiments, the driving vertical surface 5412 and the driven vertical surface 5112 are arranged vertically, allowing the driven piston 5100 to instantly complete its upward movement. This allows the vacuum cleaner to quickly enter a low-pressure state, preparing for the next cycle. In some embodiments, a flat segment with a distance Lc, i.e., the driven connection point, is provided between the driving ramp 5411 and the driving vertical surface 5412 of a single driving part 5410. The cam interface is configured such that after the driven piston 5110 completes its downward stroke, the driving piston 5400 rotates or changes 10 degrees, while the vertical position of the driven piston 5100 remains unchanged. That is, the backflushing inlet 1004 remains open.

[0175] An embodiment of the cam profile in Figures 24 to 28 The diagram shows that if the cam interface is configured to drive the drive piston 5400 to rotate or change a total of 360 degrees per cycle, each cycle includes three loops. Of course, in other embodiments, the number of loops is not limited to three, but can be two or four, that is, each cycle includes at least one loop to ensure that each cycle includes at least one downward and one upward stroke of the driven piston 5100.

[0176] After the vacuum cleaner completes one cycle, the negative pressure inside the main unit chamber 1001 increases due to airflow filling, so it needs to be pre-charged with negative pressure. Therefore, an interval is set between two cycles within one cycle, such as... Figure 25 As shown in the upward process, Figure 25 In the direction shown, from right to left, three drive units 5410 can be optionally set in pairs, with a distance La between the first drive unit 5410 and the second drive unit 5410. The cam interface is configured such that the drive piston 5400 rotates or changes by 20 degrees between completing the first cycle and starting the second cycle, while the driven piston 5100 remains in the same vertical position, i.e., the backflush inlet 1004 remains closed.

[0177] Of course, in some embodiments, the backflush inlet 1004 may also remain open. The distance Lb between the second drive unit 5410 and the third drive unit 5410, and the cam interface configured such that the drive piston 5400 rotates or changes 20 degrees between completing the second cycle and starting the third cycle, while the driven piston 5100 remains in a constant vertical position, that is, the backflush inlet 1004 remains closed.

[0178] Of course, in some embodiments, the backflush inlet 1004 can also be kept open. In this embodiment, La = Lb, but in some instances, La can be set to be less than Lb. Because the negative pressure inside the main unit chamber 1001 and the dust cup chamber 2001 is somewhat reduced after the last cycle, a longer period of negative pressure charging is required.

[0179] In some embodiments, considering that the driven piston 5400 will be subjected to torque generated by the driven piston 5100 during rotation, in order to balance the torque in the circumferential direction, at least two sets of drive parts 5410 and driven parts 5110 may be provided, with each set distributed in a circumferential array.

[0180] In one embodiment, the vacuum cleaner may further include a detection component 8000, which is communicatively connected to the back-blowing device 5000, enabling the transmission of communication data. This allows the detection component 8000 to be configured to acquire control status data of the back-blowing device 5000 based on the communication connection. The control status data includes the control status of opening or closing the back-blowing inlet 1004. Therefore, the main function of the detection component 8000 is to detect the control status of the back-blowing device 5000 in opening or closing the back-blowing inlet 1004. If the vacuum cleaner enters normal operating mode, it must be linked to control the back-blowing device 5000 to close the back-blowing inlet 1004. The back-blowing inlet 1004 should not be open when the vacuum cleaner is in normal operating mode, as this would cause air leakage and affect the vacuum cleaner's suction performance.

[0181] For example, the detection component 8000 can be connected to at least one of the drive piston 5400 and the driven piston 5100, and the control status data includes the drive engagement state between the drive piston 5400 and the driven piston 5100. In this case, the main function of the detection component 8000 is to detect the drive engagement state between the drive piston 5400 and the driven piston 5100. If the drive engagement state between the drive piston 5400 and the driven piston 5100 is detected as the backflushing inlet 1004 being open, then the vacuum cleaner is prevented from entering the normal operating state.

[0182] The detection component 8000 can detect the state of the backflush device 5000 in various ways, and can also be equipped with corresponding control components as needed. The detection component 8000 may include a detectable component (e.g., a magnetic element 8100) mounted on and carried by the drive piston 5400, and a sensing component (e.g., a Hall element 8200) mounted on the vacuum cleaner. The detectable component is positioned such that when the drive piston 5400 moves to its initial position, the sensing component senses the position of the detectable component. The sensing component may be mounted on a fixed part of the vacuum cleaner (e.g., a mounting base or main housing) or a non-rotatable part (e.g., the driven piston 5100).

[0183] In one embodiment, the detectable component can be configured to be detected by the sensing component within the effective sensing area of ​​the sensing component. Direct physical contact between the detectable component and the sensing component is not required. This is because the effective sensing area allows the detectable component to be detected at a predetermined distance from the sensing component. Figure 24 The embodiment shown is an embodiment in which the detectable component is disposed on the driven piston 5100. The predetermined distance can be the distance Da between the detectable component and the sensing component when the driving piston 5400 and / or the driven piston 5100 are in the initial position.

[0184] When the drive piston 5400 and driven piston 5100 are in other positions, the distance Db between the detectable component and the sensing component is set such that Da has a unique value when the drive piston 5400 and driven piston 5100 are in their initial positions, specifically, their positions coincide in the vertical direction. In other embodiments, such as those where the detectable component is disposed on a fixed part of the vacuum cleaner (e.g., a mounting base or main housing), this predetermined distance may be the distance Da between the drive piston 5400 and the detectable component and the sensing component when they are in their initial positions.

[0185] When the drive piston 5400 and driven piston 5100 are in other positions, the distance Db between the detectable component and the sensing component is set such that Da has a unique value when the drive piston 5400 and driven piston 5100 are in their initial positions. Specifically, it is set so that their angular positions coincide in the circumferential direction. Preferably, the detectable component is disposed on a fixed part of the vacuum cleaner (e.g., a mounting base or main unit housing), because the detectable component needs to communicate with the control components, and a fixed installation position simplifies the structure and equipment.

[0186] The detection component 800 may include or be operatively coupled to a switch configured to close and send an electrical signal to the control device of the vacuum cleaner when the drive piston 5400 moves to the initial position, and to open if the drive piston 5400 or the driven piston 5100 is in a non-initial position, so that the components of the vacuum cleaner are continuously powered, specifically, the driver 5200 continues to rotate until the drive piston 5400 or the driven piston 5100 moves to the initial position, and the switch closes and stops powering the components of the vacuum cleaner, specifically, the driver 5200 stops rotating.

[0187] The component controlled by the detection component 800 can be the driver 5200 or any combination thereof. Other components that may be powered depending on whether the initial position is detected include the user interface.

[0188] In embodiments where the sensing component is a Hall effect sensor, the Hall sensor can be arranged to function as a switch configured to close and stop supplying power to components of the vacuum cleaner when the drive piston 5400 moves to its initial position. The Hall effect sensor can change state when the magnetic field it experiences exceeds a predetermined value. If the magnetic field drops below the predetermined value, the Hall effect sensor will change state again.

[0189] The vacuum cleaner may include a control component operatively coupled to various functional systems of the device for controlling its operation, including but not limited to a power source 1006 control system, a surface cleaner roller brush control system, and a flow guide device 3000 control system. In one embodiment, the control component may include a microcontroller unit (MCU) containing at least one central processing unit (CPU). The user of the vacuum cleaner can interact with the control component via a user interface.

[0190] The control component detects the state of the switch, such as the state of the Hall element 8200. The control component is arranged to selectively allow or block power supply to the component based on the state of the switch. This, in turn, depends on the distance between the Hall element 8200 and the magnetic element 8100.

[0191] During operation, when the user presses down on the control button 7400, the first control unit 7500 of the control button 7400 drives the baffle plate 7100 to close the dust cup inlet 2002. Simultaneously, the driver 5200 rotates in a directional direction, and the lower cam surface on the drive piston 5400 engages with the upper cam surface of the driven piston 5100. The drive piston 5400 rotates from its initial position and continues to rotate, causing the driven piston 5100 to circulate up and down due to the interface between the drive piston 5400 and the driven piston 5100. When the driven piston 5100 reaches its downward limit position, the backflush inlet 1004 opens to its maximum extent, allowing fluid to backflush the filter, and filter dust enters the dust cup. In some cases, if the user releases the control button during or after a cycle, the dust cup inlet opens, and the drive piston continues to rotate until it returns to its initial position. This ensures that the backflush inlet 1004 remains closed and prepares for the next start-up.

[0192] As can be seen from the above, the detection component 8000 may include a magnetic element 8100 and a Hall element 8200. The magnetic element 8100 is disposed on the drive piston 5400, and the Hall element 8200 is disposed on the driven piston 5100. The Hall element 8200 is configured to detect the magnetic data information of the magnetic element 8100. This magnetic data information includes the relative positional relationship between the Hall element 8200 and the magnetic element 8100, such as the relative distance between the Hall element 8200 and the magnetic element 8100, the circumferential rotation position, etc. Based on the magnetic data information, the control state data of the backflush device 5000 is obtained, the relative distance and circumferential rotation position between the drive piston 5400 and the driven piston 5100 are determined, and the driving cooperation state between the two is known.

[0193] For example, when the driving piston 5400 and the driven piston 5100 rotate relative to each other, they can have relative positions in their initial positions and other states. (Continue reading...) Figure 17a and Figure 17b As shown, in this initial position, the Hall element 8200 is set as follows: Figure 12 Directly below the magnetic element 8100, when the driven piston 5100 closes the backflush inlet 1004, the detection component 8000 can send a signal to the matching control component, which then controls the driver 5200 to stop moving.

[0194] When the user presses the control button 7400, if the duration of pressing the control button 7400 is limited to t1, the driver 5200 will be triggered to work within the time t1. However, the time for the driver 5200 to rotate relative to the drive piston 5400 and the driven piston 5100 from the initial position to return to the initial position after one rotation may be t2. Since t2 is different from t1, the time for the user to press the control button 7400 is often insufficient to make the relative rotation between the drive piston 5400 and the driven piston 5100 rotate from the initial position to return to the initial position after one rotation each time.

[0195] Specifically, t1 can be less than t2, or t1 can be greater than t2, or t1 can be less than 2*t2. Such possibilities are all possible. Therefore, the Hall element 8200 is needed to provide feedback on whether the relative rotation between the drive piston 5400 and the driven piston 5100 is in its initial position, ensuring that the driven piston 5100 can reset after each self-cleaning cycle.

[0196] When the driving ramp 5411 of the driving unit 5410 and the driven ramp 5111 of the driven unit 5110 are driven together, the Hall element 8200 can be used to detect the driving engagement state between the driving ramp 5411 and the driven ramp 5111 based on magnetic data information, thereby obtaining the control state data of the backflush device 5000. The Hall element 8200 can be disposed on the end face of the driving piston 5400, and the magnetic element 8100 can be disposed on the end face of the driven piston 5100.

[0197] When the end face of the drive piston 5400 is configured as an annular end face, the Hall element 8200 may have a gap with the drive part 5410 along the annular direction of the drive piston 5400. When the end face of the driven piston 5100 is configured as an annular end face, the magnetic element 8100 may have a gap with the driven part 5110 along the annular direction of the driven piston 5100.

[0198] See Figure 11 and Figure 12 As shown, when the end face of the driving piston 5400 is provided with a first mounting groove, the magnetic element 8100 can be disposed in the first mounting groove. When the end face of the driven piston 5100 is provided with a second mounting groove, the Hall element 8200 can be disposed in the second mounting groove, and the Hall element 8200 is connected to the control component for power supply.

[0199] In one embodiment, the output end of the driver 5200 can specifically be an output shaft, and a shaft fixing part 5420 can be provided inside the drive piston 5400. This shaft fixing part 5420 can be designed as, for example, a D-shaped hole or similar structure. In this case, the drive piston 5400 can achieve rotational movement under the drive of the driver 5200. One or more drive parts 5410 can be provided circumferentially on the drive piston 5400. When multiple drive parts 5410 are provided, the multiple drive parts 5410 can be angularly distributed in the same radius area along the circumferential direction of the shaft fixing part 5420. The distribution method can be an array equidistant distribution or an unequal distribution, a continuous distribution or a non-continuous spaced distribution, or a partially overlapping distribution. Those skilled in the art can design according to actual needs, and no limitation is made here.

[0200] The driven piston 5100 is mounted on the assembly base housing 5300, which has a mounting portion, such as a limiting protrusion 5320. The driven piston 5100 has a mating portion, such as a limiting groove 5120. The limiting protrusion 5320 and the limiting groove 5120 are axially movable and aligned, allowing the driven piston 5100 to move up and down along the axial direction on the assembly base housing 5300 through the axial sliding engagement between the limiting protrusion 5320 and the limiting groove 5120. Specifically, the shaft is parallel to or coincides with the output shaft of the driver 5200.

[0201] The drive ramp 5411 and the drive vertical surface 5412 are connected at a drive connection point, and the driven vertical surface 5112 and the driven ramp 5111 are connected at a driven connection point. (See reference...) Figure 18a and Figure 18b As shown, the rotational motion of the driving piston 5400 drives the driven piston 5100 to move up and down. When the driven connection contacts the driving inclined surface 5411, the driven piston 5100 moves downward. When the driven connection moves to the driving connection between the driving inclined surface 5411 and the driving vertical surface 5412, refer to... Figure 19a and Figure 19b As shown, when the driven piston 5100 moves to its limit position, the airflow of the backflush air entering through the backflush inlet 1004 is at its maximum. The driven connection then contacts the vertical surface of the drive vertical surface 5412, and the driven piston 5100 can quickly return to the closed position with the support of the elastic element 5500.

[0202] The drive ramp 5411 is inclined, which helps to reduce the resistance of the actuator 5200. The drive vertical surface 5412 is vertically set, which helps to speed up the reset and also provides space utilization. The driven ramp 5111 and the driven vertical surface 5112 are set to match the gap between the two driven pistons 5100.

[0203] Continue reading Figure 14 and Figure 15 As shown, in one embodiment, a cyclone separator 6000 may be provided in the dust cup chamber 2001 of the dust cup 2000. A through dust collection channel 6100 is provided inside the cyclone separator 6000, and the filter assembly 4000 is fixedly assembled in the dust collection channel 6100 of the cyclone separator 6000. A guide fin 6200 is provided on the outer wall of the cyclone separator 6000. The cyclone separator 6000 is assembled and connected to the inner wall of the dust cup chamber 2001 through the guide fin 6200. A channel inlet 6300 is provided between the guide fin 6200 and the inner wall of the dust cup chamber 2001. The channel inlet 6300 connects the dust cup inlet 2002 and the dust collection channel 6100. The main unit inlet 1002 is connected to the dust collection channel 6100 of the cyclone separator 6000.

[0204] Because there is a channel inlet 6300 between the guide fin 6200 and the inner wall of the dust cup chamber 2001, the airflow can enter the channel inlet 6300 through the dust cup inlet 2002, and then enter the dust collection channel 6100, carrying dust through the dust collection channel 6100 and passing through the filter assembly 4000. After being filtered by the filter assembly 4000, the sucked-in dust can fall again through the dust collection channel 6100 of the cyclone 6000 into the dust cup chamber 2001, where it will collect.

[0205] Dust enters through the dust cup inlet 2002 into the channel inlet 6300, then through the dust collection channel 6100 into the filter assembly 4000. Between the channel inlet 6300 and the dust collection channel 6100, a cyclone separator 6000 isolates the filter assembly 4000, preventing dust from directly entering it. Instead, the outer wall of the cyclone separator 6000 performs initial dust separation. The cyclone separator 6000 also isolates the filter assembly 4000 from the main unit inlet 1002, preventing dust from clogging the filter assembly 4000 upon entry.

[0206] In one embodiment, the cyclone 6000 can be configured as a cylindrical structure with a gradually decreasing diameter along its axial direction. If the diameter of the cyclone 6000 is limited to gradually decreasing from top to bottom, then the upper inner diameter of the cyclone 6000 can be set as d1 and the lower inner diameter as d2, where d1 is greater than d2. Simultaneously, the filter assembly 4000 can be configured as a circular structure, allowing it to be installed inside the cyclone 6000 and adapting to the circular cylindrical cross-section of the cyclone 6000. In this case, the diameter of the filter assembly 4000 can be set as D. Therefore, D can be limited to be greater than d2 and less than d1. The height of the cyclone 6000 can also be limited to h.

[0207] For example, d1 = 115mm, d2 = 64mm, D = 111mm, and h = 50mm. d2 is greater than 0.5D, facilitating dust fall from the filter assembly, while d1 is greater than D, ensuring the cyclone 6000 collects dust from the filter assembly 4000. The bottom of the cyclone 6000 is lower than the main unit inlet 1002, thus ensuring fluid cyclone movement. In this application, the filter assembly 4000 needs to be backflushed periodically; therefore, h can be set to be less than d2 to facilitate dust removal after backflushing of the filter assembly 4000.

[0208] Since the dust cup inlet 2002 needs to be closed when the vacuum cleaner enters the self-cleaning state, in one embodiment, the vacuum cleaner may include a shielding component 7000. The shielding component 7000 may be set in the main housing 1000 or the dust cup 2000 according to functional design requirements. The shielding component 7000 may be configured to open or close the dust cup inlet 2002. Thus, when the vacuum cleaner enters the self-cleaning state, the shielding component 7000 actively closes the dust cup inlet 2002. When the vacuum cleaner ends the self-cleaning state and enters the normal working state, the shielding component 7000 can also actively open the dust cup inlet 2002 without affecting the normal vacuuming function of the vacuum cleaner.

[0209] Therefore, in one embodiment, the shielding component 7000 can be designed to be electrically connected to the airflow guiding device 3000 and the back-blowing device 5000. By using the shielding component 7000 and the airflow guiding device 3000 to form a linkage control, when the vacuum cleaner needs to be in normal working condition, the shielding component 7000 does not shield the dust cup inlet 2002. At this time, the airflow guiding device 3000 guides the airflow to flow sequentially along the direction of the dust cup inlet 2002, the dust cup chamber 2001, the dust cup outlet 2003, the main unit inlet 1002, the main unit chamber 1001, and the main unit outlet 1003, thereby achieving the dust suction effect. This causes the dust to also flow sequentially along the direction of the dust cup inlet 2002, the dust cup chamber 2001, and the dust cup outlet 2003. When the dust passes through the filter component 4000, it can be trapped.

[0210] When the vacuum cleaner needs to be in self-cleaning mode, the shielding component 7000 blocks the dust cup inlet 2002. At this time, the shielding component 7000 can be configured to activate the airflow guiding device 3000 and the back-blowing device 5000 when the dust cup inlet 2002 is closed. The airflow guiding device 3000 operates, guiding the airflow sequentially along the direction of the main unit chamber 1001 and the main unit outlet 1003, creating a certain degree of negative pressure within the main unit chamber 1001. The main unit chamber 1001 and the dust cup chamber 2001 are in fluid communication, and their internal pressures are the same. Since the main unit outlet 1003 is much smaller than the dust cup outlet 2003, most of the fluid entering through the back-blowing will flow through the dust cup outlet 2003, pass through the aforementioned filter component 4000, and then enter the dust cup chamber 2001.

[0211] In this state, the backflush device 5000 can open the backflush inlet 1004. Since the main unit chamber 1001 is under negative pressure, once the backflush inlet 1004 is opened, a stream of air will suddenly enter the main unit chamber 1001 from the outside through the backflush inlet 1004. The sudden airflow has a certain impact force, which can impact the filter element 4000 and beat the filter element 4000 to a certain extent, knocking off the dust deposited on the filter element 4000 and cleaning the filter element 4000.

[0212] The shielding assembly 7000 can control the flow guiding device 3000 and the backflushing device 5000 in various ways. For example, in one embodiment, see [reference needed]. Figure 16As shown, the shielding assembly 7000 may include a shield 7100, a torsion spring 7200, a micro switch 7300, and a control button 7400. The shield 7100 is rotatably mounted on the dust cup 2000. The torsion spring 7200 is connected between the dust cup 2000 and the shield 7100, and is configured to elastically control the shield 7100 to open the dust cup inlet 2002. Therefore, when the vacuum cleaner is in normal operation and does not need to enter self-cleaning mode, the torsion spring 7200 can use its elastic force to keep the shield 7100 open and the dust cup inlet 2002. The micro switch 7300 is electrically connected to the airflow guiding device 3000 and the back-blowing device 5000, and can be configured to control the airflow guiding device 3000 and its opening.

[0213] At this time, the control button 7400 is movably mounted on the dust cup 2000. The control button 7400 has a first control part 7500 and a second control part 7600. The first control part 7500 and the second control part 7600 can adopt structures such as rods or protrusions, as long as the first control part 7500 can drive the baffle plate 7100 and the second control part 7600 can drive the micro switch 7300. Among them, the first control part 7500 can be used to drive the baffle plate 7100 to close the dust cup inlet 2002, and the second control part 7600 can be used to press the micro switch 7300.

[0214] When the user presses the control button 7400, the first control unit 7500 of the control button 7400 will drive the baffle 7100 to close the dust cup inlet 2002. At the same time, the second drive unit 5410 of the control button 7400 will press the micro switch 7300. After the micro switch 7300 is triggered by the second control unit 7600, it will immediately turn on the back-blowing device 5000. At this time, the flow guiding device 3000 is always in the working state. Therefore, with the dust cup inlet 2002 closed, the vacuum cleaner can enter the self-cleaning state.

[0215] Regarding the control component mentioned above, the shielding component 7000 and the backflushing device 5000 can be communicatively connected to the control component. The control component can be integrated into the flow guiding device 3000, or integrated into the power source 1006, or independently installed in the main housing 1000. Those skilled in the art can design it according to actual needs, and no limitation is made here. The control component receives and analyzes the electrical signals (such as the signal from the micro switch 7300) from the shielding component 7000, and then sends a working command to the backflushing device 5000 (such as starting the control driver 5200).

[0216] The control component can also communicate with the detection component 8000. After receiving the signal from the detection component 8000, it analyzes the relative positional relationship between the driven piston 5100 and the driving piston 5400 to ensure that the running stroke between the driven piston 5100 and the driving piston 5400 is in a preset state.

[0217] The dust cup 2000 is detachable from the main housing 1000. The dust cup 2000 is equipped with a filter assembly 4000, a shielding assembly 7000, and a dust cup inlet 2002. By placing the control button 7400 at the dust cup inlet 2002, a simple mechanical transmission between the control button 7400 and the shielding plate 7100 can be achieved.

[0218] The back-blowing device 5000 is installed in the main housing 1000, and the shielding component 7000 is installed in the dust cup 2000. The back-blowing function of the back-blowing device 5000 and the shielding function of the shielding component 7000 can both be communicated with the control component. Therefore, electrical couplers can be installed on the dust cup 2000 and the main housing 1000 respectively to realize the communication connection between the two relatively detachable structures, the dust cup 2000 and the main housing 1000.

[0219] If the control button 7400 is located on the main housing 1000, an additional driving device would be needed near the dust cup inlet 2002 to control the opening and closing of the baffle 7100, increasing costs and requiring more space. Furthermore, if the control button 7400 is located on the top of the main housing 1000, the user would experience increased hand pressure when holding the handle 1005 with one hand and pressing down on the control button 7400 with the other, causing inconvenience.

[0220] The structural design provided in this application allows the user to hold the handheld part 1005 with one hand and support the suction pipe 2100 of the dust cup inlet 2002 with the other hand, while simultaneously pressing the control button 7400 to achieve self-cleaning, making it convenient for the user to operate.

[0221] In another embodiment, the backflush device 5000 may also be a device structure comprising components such as a rotating gear, a drive motor, an opening / closing rocker, and a suction baffle. The rotating gear is provided with a drive gear assembly and drive teeth, the drive gear assembly containing several unit teeth continuously arranged along the rotation direction of the rotating gear. The output end of the drive motor is connected to the rotating gear drive, and the drive motor can control the rotation of the rotating gear along its fixed axis, providing rotational power to the rotating gear. The opening / closing rocker is movably mounted in the main unit chamber 1001, and the opening / closing rocker is mainly configured to open or close the backflush inlet 1004. In this case, several unit teeth of the drive gear assembly are configured to cooperate with the opening / closing rocker drive, and each unit tooth is configured to drive the opening / closing rocker to open the backflush inlet 1004 once.

[0222] Therefore, when the drive motor drives the rotating gear to rotate on its fixed axis, the rotation of the rotating gear on its fixed axis controls the drive gear assembly to make contact with the opening and closing rocker. Each unit tooth in the drive gear assembly can drive the opening and closing rocker to open the backflush inlet 1004 once. According to the design of the number and distribution of the unit teeth in the drive gear assembly, the backflush inlet 1004 can be opened and closed quickly several times as expected. The number of times it is opened and closed quickly depends on the number of unit teeth in the drive gear assembly, and the frequency of the rapid opening and closing depends on the relative distance between adjacent unit teeth in the drive gear assembly. In one embodiment, the drive gear assembly can be designed to include three unit teeth, and the unit teeth are configured as plate-like structures.

[0223] Simultaneously, the suction baffle is movably mounted on the dust cup 2000. The suction baffle is configured to open or close the dust cup inlet 2002. The drive teeth of the rotating gear are configured to engage with the suction baffle, thereby driving the suction baffle to close the dust cup inlet 2002. Therefore, when the drive motor drives the rotating gear to rotate on its fixed axis, the rotation of the fixed axis of the rotating gear controls the movement of the drive teeth of the rotating gear, which triggers the movement of the suction baffle to close the dust cup inlet 2002. Thus, when the drive motor drives the rotating gear to rotate on its fixed axis, it can simultaneously control the closing of the dust cup inlet 2002 and the rapid opening and closing of the backflushing inlet 1004 several times. With the dust cup inlet 2002 closed, the vacuum cleaner enters a self-cleaning state, rapidly drawing airflow from the backflushing inlet 1004 through the rapid opening and closing of the backflushing inlet 1004, impacting the filter assembly 4000 with airflow to achieve a cleaning effect. For details regarding the process of airflow entering from the backflushing inlet 1004 to achieve cleaning of the filter assembly 4000, please refer to the relevant records above, which will not be repeated here.

[0224] In one embodiment, the backflushing device 5000 may further include a pushing element and a rotating shaft. The pushing element is movably mounted in the dust cup 2000 and connected to the suction port baffle. The drive teeth of a rotating gear are configured to engage with the pushing element, thereby indirectly driving the suction port baffle to close the dust cup inlet 2002. Alternatively, the pushing element is rotatably mounted in the dust cup 2000 via a fixed axis of the rotating shaft, and is connected to the suction port baffle via the shaft. The drive teeth of the rotating gear are configured to drive the pushing element to rotate along the fixed axis of the rotating shaft, thereby indirectly driving the suction port baffle to rotate along its fixed axis, and thus closing the dust cup inlet 2002.

[0225] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0226] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A vacuum cleaner characterised in that, The vacuum cleaner includes: The main unit housing has a main unit chamber and a main unit inlet, a main unit outlet and a backflush inlet communicating with the main unit chamber; the main unit housing is provided with a handheld part; A dust cup is disposed in the main unit housing. The dust cup has a dust cup chamber and a dust cup inlet and a dust cup outlet communicating with the dust cup chamber. The dust cup outlet is communicating with the main unit inlet. An airflow guiding device is disposed in the main housing, located between the dust cup and the handheld part, and at least partially overlaps with the dust cup in the direction from the dust cup to the handheld part; the airflow guiding device is configured to guide airflow sequentially along the direction of the dust cup inlet, the dust cup chamber, the dust cup outlet, the main housing inlet, the main housing chamber, and the main housing outlet; A filter assembly is disposed in the dust cup chamber; A power source, which is connected to the flow guiding device; A backflush device is disposed in the main unit chamber and configured to open or close the backflush inlet.

2. The dustsucker according to claim 1, characterized in that, The filtering component includes: Filter support; A filter, which is assembled on the filter support; A front seal, which is assembled on the front side of the filter bracket; A rear seal is fitted to the rear side of the filter bracket.

3. The dustsucker according to claim 2, characterized in that, The filter holder includes: Frame; A handle, which is fitted onto the frame. The fixing part is configured to be a plurality of fixing parts, and the plurality of fixing parts are disposed on the side wall of the frame part along the circumference of the frame part; The number of support bars is configured to be several, and several support bars are assembled on the frame and arranged around the handle.

4. The dust cup according to claim 2, wherein The filter assembly is disposed within the dust cup, with the upstream end of the filter connected to the dust cup chamber and the downstream end connected to the main unit inlet; and / or, The filter is disposed on the main unit housing, with its upstream end connected to the main unit inlet and its downstream end connected to the main unit outlet; and / or, The filter is disposed between the dust cup and the main unit housing, with the upstream end of the filter connected to the dust cup outlet and the downstream end connected to the main unit inlet; and / or, The dust cup and the main unit housing are each provided with an electrical coupler, and the dust cup and the main unit housing are detachably connected in communication via the two electrical couplers.

5. The dust cup according to claim 1, wherein The dust cup is detachably mounted on the main unit housing; and / or The backflush inlet is configured as a grid-like window in the main housing; and / or, The dust cup inlet is connected to a suction pipe; and / or The main unit outlet is connected to an air outlet duct, and the air guide device is connected to the air outlet duct.

6. The dust cup according to claim 1, wherein The backflush device includes a cam assembly, which includes a cam drive member and a cam follower member that drive each other. A cam interface is provided between the cam drive member and the cam follower member for mutual driving and cooperation. The cam drive member and the cam follower member open or close the backflush inlet by driving and cooperating through the cam interface.

7. The vacuum cleaner according to claim 6, characterized in that, The cam follower is configured as a driven piston, which is movably mounted in the main unit chamber; A driver, the output of which engages with the driven piston, the driver being configured to drive the driven piston to open or close the backflush inlet.

8. The dust cup according to claim 7, wherein The backflush device includes: An assembly base shell is disposed in the main unit chamber. The assembly base shell has a fluid channel, and the backflush inlet communicates with the main unit chamber through the fluid channel. The actuator is disposed on the assembly base housing and is configured to drive the driven piston to open or close the fluid passage of the assembly base housing, thereby indirectly opening or closing the backflush inlet.

9. The dustsucker according to claim 8, characterized in that The cam actuator is configured to drive a piston, which is located at the output end of the driver, and the driver is configured to drive the driven piston in a cooperative manner via the drive piston.

10. The dustsucker according to claim 9, characterized in that The driving piston is provided with a driving part, the driving part having a driving inclined surface and a driving vertical surface, the driving inclined surface being connected to the driving vertical surface; The driven piston is provided with a driven part, the driven part having a driven inclined surface and a driven vertical surface, the driven inclined surface being connected to the driven vertical surface; The driving ramp of the driving part is configured to engage with the driven ramp of the driven part to drive the driven piston to move in a direction away from the fluid channel, thereby opening the fluid channel.

11. The dustsucker according to claim 10, characterized in that The driving part is disposed on the end face of the driving piston, and both the driving inclined surface and the driving vertical surface are connected to the end face of the driving piston. The driven part is disposed on the end face of the driven piston, and both the driven inclined surface and the driven vertical surface are connected to the end face of the driven piston. Both the end faces of the driving piston and the end faces of the driven piston are configured as annular end faces; and / or, The driven piston is elastically mounted in the main unit chamber via an elastic element, which is configured to elastically drive the driven piston to move along a direction close to the fluid channel, thereby closing the fluid channel; And / or, At least one of the assembly base and the driven piston is provided with a sealing element, the driven piston being in a sealing engagement with the fluid passage through the sealing element, thereby sealing and closing the fluid passage; and / or The driver is configured as a stepper motor; and / or, The driving ramp is configured as a curved surface, and the driven ramp is configured as a curved surface.

12. The dustsucker according to claim 11, characterized in that During a 360° cycle of the mutual driving and driving interaction of the cam drive member and the cam follower member through the cam interface, the backflush inlet opens or closes at least once; and / or, During the mutual driving and engagement of the cam drive member and the cam follower member through the cam interface, energy is stored in the gap except when the backflush inlet is open or closed; and / or, The driving part and the driven part are arranged symmetrically to each other in the circumferential direction.

13. The vacuum cleaner according to claim 11, characterized in that, The vacuum cleaner includes: A detection component is connected to the backflush device and is configured to acquire control status data of the backflush device, the control status data including the control status of opening or closing the backflush inlet.

14. The vacuum cleaner according to claim 13, characterized in that, The detection component is connected to at least one of the driving piston and the driven piston, and the control status data includes the driving engagement state between the driving piston and the driven piston.

15. The vacuum cleaner according to claim 14, characterized in that, The detection component includes: Detectable component, the detectable component being disposed on the drive piston; A sensing component is disposed on the driven piston and configured to detect magnetic data information of the detectable component, thereby obtaining control state data of the backflush device based on the magnetic data information.

16. The vacuum cleaner according to claim 15, characterized in that, The sensing component is configured to detect the driving engagement state between the driving ramp and the driven ramp based on the magnetic data information, thereby obtaining the control state data of the backflush device.

17. The vacuum cleaner according to claim 16, characterized in that, The sensing component is disposed on the end face of the driving piston, and the detectable component is disposed on the end face of the driven piston; and / or, When the driving piston and the driven piston are in their initial positions, the distance between the detectable component and the sensing component has a unique value Da.

18. The vacuum cleaner according to claim 17, characterized in that, The sensing component has a gap with the driving part along the circumferential direction of the driving piston; and / or, The detectable component has a gap with the driven part along the circumferential direction of the driven piston.

19. The vacuum cleaner according to claim 18, characterized in that, The end face of the drive piston has a first mounting groove, and the sensing component is disposed in the first mounting groove; and / or, The driven piston has a second mounting groove on its end face, and the detectable component is disposed in the second mounting groove.

20. The vacuum cleaner according to claim 1, characterized in that, The dust cup is equipped with a cyclone separator in its dust cup chamber, and a through dust collection channel is opened inside the cyclone separator. A filter assembly is installed in the dust collection channel of the cyclone separator. The outer wall of the cyclone is provided with air guide fins, and the cyclone is assembled and connected to the inner wall of the dust cup chamber through the air guide fins. There is a channel inlet between the air guide fins and the inner wall of the dust cup chamber, and the channel inlet connects the dust cup inlet and the dust collection channel. The main unit inlet is connected to the ash collection channel of the cyclone.

21. The vacuum cleaner according to claim 9, characterized in that, The vacuum cleaner includes: A shielding assembly disposed in the dust cup and configured to open or close the dust cup inlet.

22. The vacuum cleaner according to claim 21, characterized in that, The shielding assembly is electrically connected to the flow guiding device and the backflushing device, and the shielding assembly is configured to open the flow guiding device and the backflushing device when the dust cup inlet is closed.

23. The vacuum cleaner according to claim 22, characterized in that, The occlusion component includes: A baffle plate, which is rotatably mounted on the dust cup; A torsion spring is connected between the dust cup and the baffle plate, and the torsion spring is configured to elastically control the baffle plate to open the dust cup inlet.

24. The vacuum cleaner according to claim 23, characterized in that, The occlusion component includes: A microswitch is electrically connected to the flow guiding device and the backflushing device, and the microswitch is configured to control the flow guiding device and the flow guiding device to turn on; A control button is movably disposed in the dust cup. The control button has a first control part and a second control part. The first control part is driven to cooperate with the baffle plate to drive the baffle plate to close the dust cup inlet. The second control part is driven to cooperate with the micro switch to press the micro switch.

25. The vacuum cleaner according to claim 24, characterized in that, The actuator is configured to stop moving when the drive piston returns to its initial position and the microswitch is turned off.

26. The vacuum cleaner according to claim 1, characterized in that, The backflush device includes: A rotating gear, wherein the rotating gear is provided with a drive gear set and a drive gear section, and the drive gear set includes a plurality of unit teeth continuously arranged along the rotation direction of the rotating gear; A drive motor, the output end of which is connected to the rotating gear drive; An opening and closing rocker is movably mounted in the main unit chamber. The opening and closing rocker is configured to open or close the backflush inlet. A plurality of unit teeth of the drive gear assembly are configured to engage with the opening and closing rocker. Each unit tooth is configured to drive the opening and closing rocker to open the backflush inlet once. A suction baffle is movably mounted on the dust cup and configured to open or close the dust cup inlet. The drive teeth of the rotating gear are configured to engage with the suction baffle to drive the suction baffle to close the dust cup inlet.

27. The vacuum cleaner according to claim 26, characterized in that, The drive gear assembly includes three unit teeth, which are configured as plate-like structures.

28. The vacuum cleaner according to claim 26, characterized in that, The backflush device includes: A pushing element is movably mounted on the dust cup and connected to the suction port baffle. The driving teeth of the rotating gear are configured to engage with the pushing element, thereby indirectly driving the suction port baffle to close the dust cup inlet via the pushing element.

29. The vacuum cleaner according to claim 28, characterized in that, The backflush device includes: A rotating shaft is provided, and the pushing element is rotatably mounted on the dust cup via the fixed axis of the rotating shaft. The pushing element is connected to the suction port baffle via the rotating shaft. The driving teeth of the rotating gear are configured to drive the pushing element to rotate along the fixed axis of the rotating shaft, thereby indirectly driving the suction port baffle to rotate along the fixed axis, and thus closing the dust cup inlet.

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