Vacuum cleaner and cleaning system

Abstract

Provided in the embodiments of the present application are a vacuum cleaner and a cleaning system. The vacuum cleaner comprising a vacuum cleaner body and a dust collection device, wherein the dust collection device comprises a housing, a bottom cover pivotally connected to the housing, and a dust separator located in the housing; the dust separator has a skirt extending towards the bottom cover, and a free end of the skirt encloses a second opening facing the bottom cover; and the bottom cover is provided with a sealing assembly for covering the second opening, the sealing assembly has a flexible film and a hollow cavity, the flexible film forms a top wall of the hollow cavity, and the sealing assembly is further provided with a fourth opening to communicate the outside with the hollow cavity. The vacuum cleaner and the cleaning system provided in the embodiments of the present application have a simplified docking station structure, and can also avoid a manual cover closing operation by a user to achieve automatic closing of the bottom cover and self-locking of the housing.

Description

Vacuum cleaners and cleaning systems

[0001] Cross-references

[0002] This application incorporates Chinese Patent Application No. 2024109190753, filed on July 10, 2024, entitled “Vacuum Cleaner and Cleaning System”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application relates to the field of cleaning appliance technology, and in particular to a vacuum cleaner and cleaning system. Background Technology

[0004] Vacuum cleaners are essential household cleaning appliances for most families. They work by creating a vacuum inside the vacuum cleaner, and the pressure difference draws dust in, thus achieving the purpose of cleaning. Handheld vacuum cleaners are particularly popular among users due to their portability and multiple functions.

[0005] In related technologies, a handheld vacuum cleaner may include a nozzle, a connecting tube, a vacuum cleaner body, a negative pressure motor, a dust collection bin housing, a bottom cover, and a dust separator. The dust separator may include a skirt, with a first space formed between the outer wall of the skirt and the inner wall of the dust collection bin, and a second space formed by the inner wall of the skirt. Larger dirt and particles in the mixture may be deposited in the first space, and smaller dirt and particles in the mixture may be deposited in the second space.

[0006] The dirt in the handheld vacuum cleaner's storage compartment can be manually unlocked using the unlock button to open the bottom cover and drain the dirt directly. However, when the bottom cover needs to be closed, the user needs to manually touch the bottom cover to close it.

[0007] As shown in Figure 1, Chinese Patent CN218572110U discloses a vacuum cleaner and a vacuum cleaner base station. The vacuum cleaner base station uses a closing mechanism to close the dust collection cover of the vacuum cleaner. When the handheld vacuum cleaner body leaves the base station, the closing member of the closing mechanism contacts the open dust collection cover, causing the dust collection cover to close the dust outlet of the dust collection space. However, the closing mechanism increases the complexity of the base station structure.

[0008] In summary, the closing of the bottom cover of the aforementioned handheld vacuum cleaner requires manual operation by the user or can be achieved by setting a closing mechanism in the vacuum cleaner base station.

[0009] Application content

[0010] The purpose of this application is to provide a vacuum cleaner and cleaning system that can solve the problem of simplifying the structure while avoiding the need for users to close the lid.

[0011] To achieve the above objectives, one aspect of this application provides a vacuum cleaner, including a vacuum cleaner body and a dust collection device. The dust collection device includes a housing, a bottom cover pivotally connected to the housing, and a dust separator located within the housing. The dust separator has a skirt extending toward the bottom cover, and the free end of the skirt surrounds a second opening toward the bottom cover. The bottom cover is provided with a sealing assembly for sealing the second opening. The sealing assembly has an elastic soft membrane and a hollow cavity. The elastic soft membrane forms the top wall of the hollow cavity. The sealing assembly also has a fourth opening to communicate with the outside world and the hollow cavity.

[0012] Function: The sealing component connects the hollow cavity to the outside atmosphere through a fourth opening, allowing free exchange of gas within the cavity. When the elastic membrane is compressed by the skirt, the compressed gas within the hollow cavity is promptly discharged to the outside through the fourth opening, preventing the increased internal pressure of the hollow cavity from causing the elastic membrane to create closing resistance against the skirt. Simultaneously, when the vacuum cleaner's negative pressure motor is operating, the air pressure inside the skirt is lower than the air pressure in the hollow cavity connected to the outside atmosphere, causing the elastic membrane to expand outward to seal the second opening. This ensures that the elastic membrane remains sealed during the operation of the negative pressure motor, simplifying the base station structure and eliminating the need for users to manually close the bottom cover.

[0013] To achieve the above objectives, another aspect of this application provides a dust collection device, including a housing with an inner cavity, a bottom cover pivotally connected to the bottom of the housing, and a dust separator disposed in the inner cavity of the housing; the dust separator has a skirt extending toward the bottom cover, the free end of the skirt forming a second opening toward the bottom cover; the bottom cover is provided with a sealing assembly for sealing the second opening, the sealing assembly having a hollow cavity, the hollow cavity having a third opening disposed toward the skirt and a fourth opening disposed away from the skirt, the sealing assembly including an elastic soft membrane sealing the third opening; when the elastic soft membrane seals the second opening, the hollow cavity communicates with the outside through the fourth opening.

[0014] To achieve the above objectives, another aspect of this application provides a vacuum cleaner, including a vacuum cleaner body and a dust collection device. The dust collection device includes a housing, a bottom cover pivotally connected to the housing, and a dust separator located within the housing. The dust separator has a skirt extending toward the bottom cover, and the free end of the skirt forms a second opening toward the bottom cover. The bottom cover has a through hole and an elastic soft membrane located inside the bottom cover and covering the through hole. A hollow cavity is formed between the elastic soft membrane and the bottom cover, located below the elastic soft membrane. When the elastic soft membrane seals the second opening, the hollow cavity communicates with the outside through the through hole of the bottom cover.

[0015] To achieve the above objectives, another aspect of the embodiments of this application provides a cleaning system, including a base station and a vacuum cleaner as described above. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a partial schematic diagram of the first type of related vacuum cleaner;

[0018] Figure 2 is a partial schematic diagram of the second type of related vacuum cleaner;

[0019] Figure 3 is a partial schematic diagram of the third type of related vacuum cleaner;

[0020] Figure 4 is a partial schematic diagram of the fourth type of related vacuum cleaner;

[0021] Figure 5 is a schematic diagram of a cleaning system provided in an embodiment of this application;

[0022] Figure 6 is a longitudinal sectional view of the dust collection device provided in an embodiment of this application;

[0023] Figure 7 is a longitudinal sectional view of the dust collection device and part of the base station provided in the embodiment of this application;

[0024] Figure 8 is a partial perspective sectional view of the dust collection device provided in an embodiment of this application;

[0025] Figure 9 is a perspective sectional view of the sealing assembly shown in Figure 8;

[0026] Figure 10 is an exploded view of the sealing assembly provided in an embodiment of this application;

[0027] Figure 11 is an exploded view of the sealing assembly provided in an embodiment of this application from another perspective;

[0028] Figure 12 is a partial schematic diagram of another dust collection device provided in an embodiment of this application;

[0029] Figure 13 is a partial schematic diagram of another dust collection device provided in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1000, dust collection device; 100, housing; 110, first air inlet; 120, first opening; 200, bottom cover; 210, through hole; 211, first hole; 212, second hole; 220, cover part; 230, extension part; 300, dust separator; 310, multi-cone assembly; 320, skirt; 330, second opening; 400. Sealing assembly; 410. Elastic part; 411. Contact surface; 412. Sealing part; 413. Peripheral part; 414. Outward protrusion; 415. Elastic soft membrane; 420. Support part; 421. First support section; 4211. Third opening; 4212. Fourth opening; 4213. Bottom wall; 4214. Annular side wall; 422. Second support section; 430. Shielding part; 431. Bottom wall; 432. Connecting arm; 433. Gap channel; 440. Top surface; 441. Beveled surface; 442. Arc transition surface; 450. Bottom end face; 460. Vent hole; 470. Locking section; 480. Stepped surface; 500. Reset component; 600. Hollow cavity; 710. First separation space; 720. Second separation space; 800. First trigger component; 2000. Suction nozzle; 3000, Pipeline; 5000, Base station; 5100, Recycling chamber; 5200, Recycling channel; 5300, Second trigger; 5400, Chamber wall; 5500, Third trigger. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0032] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] In existing designs, the bottom cover of the dust collection bin is generally a normally open structure, meaning that after unlocking, the bottom cover automatically flips open the dust collection bin and remains open. When the handheld vacuum cleaner is in operation, the bottom cover can be fastened to the bottom opening of the dust collection bin housing and the bottom opening of the skirt, forming a first and second closed space at the bottom. When it is necessary to empty the dust collection bin, the dust collection bin is placed in the base station's cleaning slot to activate the base station's dust collection function, or the user can directly unlock the bottom cover to open the dust collection bin. After the bottom cover is unlocked from the dust collection bin housing, the bottom cover automatically flips away from the bottom of the housing by the force provided by the torsion spring, opening the dust collection bin. After the user removes the dust collection bin from the base station's cleaning slot, the bottom cover must be closed manually or by the automatic closing mechanism to overcome the flipping force provided by the torsion spring until the bottom cover is fastened to the bottom of the housing. However, manually turning the bottom cover may get hands dirty, and the automatic closing mechanism of the base station is relatively complex.

[0034] Meanwhile, in order to achieve a seal between the bottom cover and the skirt, the following structures are generally used in existing designs.

[0035] As shown in Figure 2, the prior art (Chinese Patent CN220713811U) discloses that the opening formed by the skirt is suspended inside the dust collection bin and away from the bottom cover of the dust collection bin. An independent sealing plate is set at the opening to seal the skirt opening. This sealing plate can be flipped in one direction to seal the bottom opening of the skirt. The sealing plate relies on negative pressure suction to keep the skirt opening closed. However, in this design, the sealing plate always partially blocks the bottom opening of the skirt and cannot be fully opened, resulting in the inability to completely empty the dirt inside. At the same time, it is not possible to guarantee that the skirt is always sealed during sealing.

[0036] As shown in Figure 3, the prior art (Chinese Patent CN219699796U) discloses an embodiment of a sealing element installed in the groove of the bottom cover. The sealing element is squeezed between the bottom edge of the skirt and the inner end face of the bottom cover to seal the opening of the skirt.

[0037] As shown in Figure 4, prior art (Chinese Patent CN115734735A) also discloses an embodiment in which the sealing element can be a cylindrical body inserted into the opening at the bottom end of the skirt to achieve an interference seal. In other prior art not shown, the sealing element can also be a flexible element disposed on the side of the skirt and surrounding the bottom edge of the skirt, with the flexible element directly fitting against the bottom cover to achieve a seal. In the case where the bottom cover of the dust collection bin is a normally open structure, the above-mentioned sealing element embodiments can overcome the resistance generated during interference sealing by relying on external force, such as manual force or an automatic closing mechanism of the base station. However, when the bottom cover needs to achieve automatic closing without the aforementioned external force, the above-mentioned sealing element structure will generate resistance to the automatic closing of the bottom cover, causing the bottom cover to not close completely, thus requiring additional force from the user or machine to achieve complete closure of the bottom cover.

[0038] Figure 5 is a schematic diagram of a cleaning system provided in an embodiment of this application. Referring to Figure 5, the cleaning system may include a vacuum cleaner and a base station 5000. The vacuum cleaner may include a nozzle 2000, a pipe 3000, a negative pressure motor (not shown in the figure) disposed in the vacuum cleaner body, and a dust collection device 1000 detachably installed to the vacuum cleaner body. The dust collection device 1000 is a dust bin used to collect solid dirt collected by the nozzle.

[0039] Figure 6 is a longitudinal sectional view of the dust collection device provided in an embodiment of this application. Referring to Figure 6, the dust collection device 1000 may include a housing 100, a bottom cover 200, and a dust separator 300. The bottom end of the housing 100 may have a first opening 120, and the bottom cover 200 may be fitted into the first opening 120 at the bottom end of the housing 100. The bottom cover may close the first opening 120 as shown in Figure 6 or open the first opening 120 as shown in Figure 7. The bottom cover 200 is pivotally connected to the housing 100, thereby enabling movement between a closed position and an open position.

[0040] A reset member 500 is provided between the bottom end of the housing 100 and the bottom cover 200. This reset member 500 provides a reset force to the bottom cover 200 to seal the first opening 120 of the housing 100 and maintain the sealed state. Specifically, the reset member 500 is located at the pivot connection between the housing 100 and the bottom cover 200. The reset member provides a closing force to the bottom cover toward the housing. When the bottom cover 200 is in the open position, under the action of the reset member 500, the bottom cover 200 rotates toward the housing 100 about the pivot point with respect to the housing 100, so that the bottom cover 200 can automatically return from the open position shown in FIG. 7 to the closed position shown in FIG. 6 without manual closing or using a complex base station automatic closing mechanism. The reset element 500 may be a torsion spring provided at the pivot point between the housing 100 and the bottom cover 200 as shown in Figures 6 and 7; or, the reset element 500 may be a linear spring or other part capable of elastic deformation. Based on the above, the reset element 500 may also include magnetic elements respectively provided on the bottom cover 200 and the housing 100, thereby improving the reset force when the bottom cover and the housing are closed by the attraction between the opposite poles of the two magnetic elements.

[0041] Referring to Figures 5 and 6, when the vacuum cleaner is working, the bottom cover 200 is in the closed position of the first opening 120 of the cover. The mixture of garbage and gas near the nozzle 2000 can be guided by the negative pressure generated by the negative pressure motor and enter the inner cavity formed by the housing 100 and the bottom cover 200 through the nozzle 2000, the connecting pipe, and the air inlet 110 of the housing 100.

[0042] A dust separator 300 is disposed within the inner cavity of the housing 100, and the dust separator 300 is capable of separating solids and gases in a mixture. Specifically, the dust separator may include a multi-cone assembly 310 and a skirt 320 extending toward the bottom cover 200. The space formed by the skirt 320 is used to receive the dirty solids separated by the dust separator, and the downwardly extending free end of the skirt 320 forms a second opening 330 toward the bottom cover 200. The bottom cover 200 is provided with a sealing assembly 400 for sealing the second opening 330.

[0043] When the vacuum cleaner is working, the bottom cover 200 can be in the closed position, sealing the first opening 120, as shown in Figure 6, and the sealing assembly 400 seals the second opening 330. Thus, the outer surface of the dust separator 300, the inner surface of the housing 100, and the inner surface of the bottom cover 200 form a closed first separation space 710; the inner surface of the skirt 320 and the inner surface of the sealing assembly 400 form a closed second separation space 720. The sealing assembly 400 isolates the first separation space 710 and the second separation space 720, preventing them from communicating through the unsealed second opening 330 when the vacuum cleaner is working. Large particles of dirt can accumulate in the first separation space 710, while small particles can accumulate in the second separation space 720.

[0044] As an example, referring to Figure 6, one side of the bottom end of the housing 100 can be hinged to the bottom cover 200 for pivoting. When the bottom cover 200 is in the closed position as shown in Figure 6, the other side of the bottom end of the housing 100 can be locked to the bottom cover 200 by a snap-fit ​​connection. In addition, a first trigger 800 is provided on the outer wall of the housing 100 near the bottom end to unlock the housing 100 from the bottom cover 200; the first trigger 800 is an unlock button.

[0045] For ease of description, in this embodiment, the end of the housing 100 connected to the bottom cover 200 is considered the bottom, and the other end of the housing 100 is considered the top (as indicated by arrow X in the attached figures). For example, the lower end of the housing 100 is connected to the bottom cover 200. The side where the lower end of the housing 100 is hinged to the bottom cover 200 is considered the left (as indicated by arrow Y in the attached figures), and the side where the lower end of the housing 100 is engaged with the bottom cover 200 is considered the right. For example, the left side of the lower end of the housing 100 is hinged to the bottom cover 200.

[0046] Referring to Figure 5, when the vacuum cleaner needs to clean up debris, the dust collection device 1000 of the vacuum cleaner is inserted downwards into the base station 5000. Figure 7 is a longitudinal sectional view of the dust collection device and part of the base station provided in the embodiment of this application. Referring to Figure 7, the base station 5000 has a collection chamber 5100 at its top, and the upper end of the collection chamber 5100 is an opening for inserting the dust collection device 1000. The collection chamber 5100 is provided with a second trigger 5300 and a third trigger 5500. The second trigger 5300 is disposed on the side wall of the collection chamber 5100 to contact the first trigger 800 disposed on the outer side wall of the housing 100, and the third trigger 5500 is disposed at the bottom of the collection chamber 5100 to contact the bottom cover 200. Specifically, the second trigger 5300 may protrude from the right side wall of the collection chamber 5100. During the process of inserting the dust collection device 1000 vertically downward into the recycling chamber 5100, the first trigger 800 of the dust collection device 1000 first contacts the second trigger 5300, thereby unlocking the engagement between the right side of the bottom cover 200 and the right side of the housing 100, while the third trigger 5500 has not yet contacted the bottom cover 200.

[0047] It should be noted that because the reset member 500 provides a closing force to the bottom cover 200, the bottom cover 200 remains sealed at the first opening 120 when the first trigger member 800 and the second trigger member 5300 are unlocked. This prevents the bottom cover 200 from being opened due to improper user operation, which could cause secondary contamination of the clean surface by recycled dirt. The base station 5000 also includes a recycling channel 5200 that communicates with the recycling chamber 5100. The bottom surface of the recycling chamber 5100 has an opening to communicate with the recycling channel 5200.

[0048] Referring to Figure 6, the bottom cover 200 includes a cover body 220 that covers the first opening 120 and an extension 230 that is connected to the cover body 220 but extends away from the cover body 220. The extension 230 is provided near the hinge point as a baffle for opening the bottom cover. The cover body 220 and the extension 230 are respectively provided on both sides of the hinge point between the bottom cover 200 and the housing 100. When the bottom cover 200 is in the closed position, the extension 230 is located outside the first opening 120.

[0049] When the first trigger 800 and the second trigger 5300 cooperate to unlock the bottom cover 200, the bottom cover 200 remains in the closed position. The housing 100 continues to move downward until the extension 230 abuts against the third trigger 5500. As the housing 100 moves further downward, the third trigger 5500 presses against the extension 230 upward, causing the extension 230 to overcome the closing force of the reset member 500 and tilt upward. With the hinge of the bottom cover 200 as the pivot point, the extension 230 on the left side of the hinge tilts upward, while the cover portion 220 on the right side of the hinge moves downward and opens. As the housing 100 moves downward within the recovery chamber 5100 until it reaches its position, the cover portion 220 of the bottom cover 200 pivots to the open position and remains there. Specifically, during the downward movement of the housing 100, the extension 230 is lifted by the third trigger 5500, causing the bottom cover 200 to rotate about the hinge point in a direction away from the housing 100, thereby opening the first opening 120 and allowing waste in the first separation space 710 to enter the recycling channel 5200. Furthermore, when the bottom cover 200 opens the first opening 120, the sealing assembly 400 on the bottom cover 200 can disengage from the skirt 320 with the movement of the bottom cover 200, opening the second separation space 720 and allowing waste in the second separation space 720 to enter the recycling channel 5200.

[0050] When the user removes the vacuum cleaner from the base station 5000, the extension 230 of the bottom cover 200 separates from the third trigger 5500. Under the action of the reset member 500, the cover plate of the bottom cover 200 automatically moves from the open position shown in Figure 7 to the closed position shown in Figure 6, but is not locked. Then, the first trigger 800 and the second trigger 5300 separate as the dust collection device 1000 moves away from the collection chamber 5100, locking the bottom cover 200 in the closed position. Thus, no additional mechanism is needed within the base station 5000 to provide the external force for closing the bottom cover 200, simplifying the base station's closing structure. Simultaneously, the bottom cover 200 does not need to consider the existing base station closing structure that provides the closing force, allowing for a larger opening angle and smoother removal of dirt. When the bottom cover 200 is in the open position, the angle formed between the bottom cover 200 and the horizontal plane where the first opening 120 is located can reach 45° or more. Referring to the embodiment in Figure 7, the angle formed between the bottom cover 200 and the horizontal plane does not exceed 70°.

[0051] By providing a reset element 500 between the bottom cover 200 and the housing 100, a closing force is provided to ensure that the bottom cover 200 remains in the closed position without external force, thus eliminating the need to add an automatic bottom cover closing structure to the base station 5000. Similarly, this design also avoids the situation in existing designs where the torsion spring, acting as the reset element, provides the force to open the bottom cover, causing it to open automatically immediately after unlocking. This prevents the user from manually overcoming the force exerted by the torsion spring on the bottom cover away from the housing to close it, thus eliminating the need for the user to actively close the bottom cover 200 and preventing dirt and grime from contaminating their hands.

[0052] Referring to Figure 6, when the negative pressure motor is working, to prevent the first separation space 710 and the second separation space 720 from communicating through the second opening 330 of the skirt 320, the second opening 330 of the skirt 320 is generally sealed by the sealing component 400. However, even in the sealed state, gaps may still exist between the skirt 320 and the sealing component 400 due to improper installation of the dust separator 300, irregularities caused by manufacturing defects of the skirt 320, etc., thus reducing dust collection performance. The sealing component 400 provided in this application embodiment can ensure that the second opening 330 is sealed when the negative pressure motor is working, even when there is a gap between the sealing component 400 and the bottom edge of the skirt. It can also seal the second opening 330 when the sealing component 400 and the bottom edge of the skirt 320 are interference-fitted, thereby adapting to the problem of different distances between the bottom edge of the skirt 320 and the sealing component 400 caused by improper installation of the dust separator 300 or manufacturing defects of the skirt 320.

[0053] In order to ensure that the sealing assembly can seal the second opening when the negative pressure motor is working, the existing design generally uses a solid sealing gasket fixed on the bottom cover and with a certain thickness, or a columnar body that can enter the second opening and fit against the inner wall of the skirt to achieve a seal, or a hollow closed air cushion fixed on the bottom cover to block the second opening, or a flexible annular sealing assembly set at the bottom edge of the skirt to fit against the bottom cover.

[0054] When the sealing assembly is a solid gasket, the gasket is clamped between the bottom end face of the skirt and the bottom cover, and deformed under pressure to achieve an interference seal, thus ensuring a sealing effect on the second opening when the bottom cover is in the closed position. When the sealing assembly is a cylindrical body, the cylindrical body enters the skirt opening and contacts the inner wall of the skirt when the bottom cover is in the closed position to achieve an interference seal. When the sealing assembly is a hollow closed air cushion, the top surface of the air cushion is pressed upward and fits against the second opening to achieve an interference seal. When the sealing assembly is a flexible annular sealing assembly set at the bottom edge of the skirt, the annular sealing assembly is pressed downward and fits against the bottom cover to achieve an interference seal.

[0055] All of the above designs require an interference fit between the sealing component and the skirt, which generates resistance when the bottom edge of the skirt contacts the sealing component. However, since the bottom cover reset component in these designs provides a reset force to keep the bottom cover open, closing the bottom cover requires additional closing force from the user or base station. This additional closing force is much greater than the resistance generated by the interference fit between the sealing component and the skirt, so there is no need to consider adjusting the resistance of the sealing component when it contacts the skirt. However, when the bottom cover can close automatically without additional closing force, the resistance of the sealing gasket will prevent the bottom cover from closing completely, causing the bottom cover that has not reached the closed position to fail to self-lock with the housing through the locking device. At the same time, all of the above-mentioned existing designs require an interference fit between the sealing component and the skirt, but the distance between the sealing component and the bottom edge of the skirt may be greater than the preset interference distance due to dust separator installation reasons or manufacturing process errors, resulting in a gap between the sealing component and the bottom edge of the skirt, which prevents sealing.

[0056] When the reset element provides the closing force to keep the bottom cover and housing in a normally closed state, the resistance generated by the interference contact of the sealing assembly, the locking force between the housing and the bottom cover, and the air pressure resistance generated by the airtightness effect when the bottom cover and housing are closed all contribute to the closing resistance preventing the bottom cover from closing automatically. When the reset force provided by the reset element to close the bottom cover is less than the closing resistance, the bottom cover cannot completely seal the first opening of the housing, and the sealing assembly cannot seal the second opening of the skirt. If the reset force is too large, the bottom cover will be difficult to open. Therefore, while ensuring that the reset force is appropriate, the structure of the sealing assembly needs to be adjusted to reduce the overall closing resistance.

[0057] The sealing assembly 400 has an elastic soft membrane 415 and a hollow cavity 600. The elastic soft membrane 415 forms the top wall of the hollow cavity 600. The sealing assembly 400 also has a fourth opening 4212 to connect the outside world with the hollow cavity 600. In other words, the bottom cover 200 has a sealing assembly 400 that seals the second opening 330. The sealing assembly 400 has a hollow cavity 600, which has a third opening 4211 facing the skirt 320 and a fourth opening 4212 away from the skirt 320. The sealing assembly 400 includes an elastic soft membrane 415 that seals the third opening 4211. When the elastic soft membrane 415 seals the second opening 330, the hollow cavity 600 communicates with the outside world through the fourth opening 4212.

[0058] In summary, the sealing assembly 400, by providing the fourth opening 4212, allows the hollow cavity 600 to communicate with the outside atmosphere, thus enabling the gas inside the hollow cavity 600 to freely exchange with the outside. When the elastic membrane 415 is squeezed by the skirt 320, the compressed gas inside the hollow cavity 600 is promptly discharged to the outside through the fourth opening 4212, preventing the internal air pressure of the hollow cavity 600 from increasing and causing the elastic membrane 415 to create closing resistance against the skirt 320. At the same time, when the vacuum cleaner's negative pressure motor is working, the air pressure inside the skirt 320 is lower than the air pressure of the hollow cavity 600, which is connected to the outside atmosphere, due to the suction force generated by the negative pressure motor. This causes the elastic membrane 415 to expand outward and be absorbed by the second opening 330. The elastic membrane 415 moves towards the skirt 320 to press against and seal the second opening 330 of the skirt 320, so that the elastic membrane 415 remains in a state of sealing the second opening 330 when the negative pressure motor is working.

[0059] Referring to Figure 8, the cover body 220 of the bottom cover 200 is provided with a through hole 210. The sealing assembly 400 is detachably installed into the through hole 210 and seals the through hole 210 to prevent the inner cavity of the dust collection device 1000 from communicating with the outside air due to the through hole 210.

[0060] As shown in Figure 6, the top surface of the sealing assembly 400 is vertically aligned with the second opening 330 formed by the bottom edge of the skirt 320. In the horizontal direction perpendicular to the vertical direction, the area of ​​the second opening 330 is smaller than the area of ​​the top surface of the sealing assembly 400. By increasing the area of ​​the top surface of the sealing assembly 400 that covers the second opening 330, the coaxial installation accuracy of the second opening 330 of the skirt 320 and the sealing assembly 400 in the vertical direction is reduced, ensuring that even if the skirt 320 is installed at an angle, the larger top surface of the sealing assembly 400 can still cover the second opening 330.

[0061] When the bottom cover 200 seals the first opening 120, the top surface of the sealing assembly 400, serving as the contact surface 411, can seal the second opening 330. Figure 9 is a perspective sectional view of the sealing assembly shown in Figure 8. Referring to Figures 8 and 9, the sealing assembly 400 has a hollow cavity 600, which can freely exchange with the outside gas, and the volume of the hollow cavity 600 changes with the elastic deformation of the contact surface 411 of the sealing assembly 400.

[0062] Referring to the embodiment shown in Figure 9, the sealing assembly 400 includes an elastic portion 410 made of a flexible material and a support portion 420 made of a rigid material. The support portion 420 has an inner cavity extending upwards and penetrating its top surface. The opening of the inner cavity facing the skirt edge 320 is defined as a third opening 4211. The support portion 420 also has a vent 460 extending downwards and penetrating the bottom wall of the inner cavity. The opening formed by the vent 460 is the fourth opening 4212. The elastic portion 410 is fitted onto the third opening 4211 of the support portion 420 and has an elastic soft membrane 415 that seals the third opening 4211. The elastic soft membrane 415 seals the third opening 4211, and its outer surface faces the second opening 330, forming a contact surface 411 that can seal the second opening 330. The elastic membrane 415 of the elastic part 410 and the inner cavity of the support part 420 together form the hollow cavity 600 of the sealing assembly 400. This hollow cavity 600 is freely connected to the outside air through a fourth opening 4212 located away from the skirt 320, thus forming a hollow cavity 600 that is sealed towards the skirt 320 but open away from the skirt 320. The elastic membrane 415 can expand outwards and move away from the inner cavity space of the support part 420 as outside gas enters the hollow cavity 600, or it can retract inwards and enter the inner cavity space of the support part 420 as gas inside the hollow cavity 600 is discharged to the outside through the vent 460. The volume of the hollow cavity 600 can change as the elastic membrane 415 of the sealing assembly 400 expands or retracts.

[0063] The elastic part 410 is in the shape of a frustum, including a top surface of the frustum, a bottom surface of the frustum opposite to the top surface of the frustum, and an inclined surface connecting the top surface of the frustum and the bottom surface of the frustum. The top surface of the frustum is a closed surface, and the bottom surface of the frustum has an opening for the support part 420 to enter, so that the elastic part 410 can be fitted on the top of the support part 420.

[0064] In other embodiments, referring to FIG12, the hollow cavity 600 has an annular sidewall 4214, and a vent 460 is disposed on the annular sidewall 4214. The bottom wall 4213 of the hollow cavity 600 is a sealing surface. By providing a fourth opening 4212 communicating with the outside atmosphere on the annular sidewall 4214 instead of providing it on the bottom wall 4213 in the same vertical direction as the elastic membrane 415 (elastic part 410), it is possible to ensure that the hollow cavity 600 communicates with the outside atmosphere while preventing foreign objects from passing through the bottom wall 4213 and damaging the elastic membrane 415 (elastic part 410), without adding an additional structure to block the vent 460.

[0065] By using a hollow cavity 600 that allows free exchange with external air, the elastic soft membrane 415 of the sealing component 400 can either make an interference fit with the bottom edge of the skirt 320 to achieve a seal, or, when the negative pressure motor is not working, there is a gap between the elastic soft membrane 415 of the sealing component 400 and the bottom edge of the skirt 320. When the negative pressure motor is working, the elastic soft membrane 415 expands outward due to the negative pressure suction in the second separation space 720 and is adsorbed to the second opening 330 of the skirt to achieve a seal on the second opening 330. This adapts to the different gaps that may exist between the skirt 320 and the sealing component 400 in different dust collection devices 1000.

[0066] In the embodiment where the sealing assembly 400 and the skirt 320 are in an interference fit, during the process of the bottom cover 200 moving from the open position shown in FIG7 to the closed position shown in FIG8, the elastic soft membrane 415 will gradually move downward under the downward pressure of the bottom edge of the skirt 320. The contact surface 411 keeps the second opening 330 sealed during the downward movement of the elastic soft membrane 415. The downwardly moving elastic soft membrane 415 will compress the gas in the hollow cavity 600. By providing a vent 460 that connects the hollow cavity 600 with the outside air, the compressed gas in the hollow cavity 600 can be discharged to the outside in time, thereby reducing or even eliminating the rebound resistance of the elastic soft membrane 415. This avoids the situation where, like a hollow closed airbag, the compressed gas cannot be discharged due to the lack of an exhaust channel, which would increase the internal air pressure and thus increase the strong rebound resistance of the elastic soft membrane 415 against the bottom edge of the skirt 320 during interference contact. Thus, compared to the prior art, the elastic soft membrane 415 of the sealing component 400 in this embodiment of the application has a larger inward and outward movement distance, while also reducing or even avoiding the rebound resistance generated by the elastic soft membrane 415 when the bottom cover 200 is closed.

[0067] In an embodiment where a gap exists between the contact surface of the sealing assembly 400 and the skirt 320, the bottom cover 200 seals the first opening 120. When the negative pressure motor is not operating, a gap exists between the contact surface of the sealing assembly 400 and the skirt 320 in the vertical direction. However, when the negative pressure motor is operating, the elastic membrane 415 of the sealing assembly 400 is drawn to the bottom end of the skirt 320 under the suction force of the negative pressure motor, causing the contact surface 411 of the sealing assembly 400 to adhere to and seal the second opening 330 of the skirt 320. During the process of the bottom cover 200 moving from the open position to the closed position, the contact surface of the sealing assembly 400 does not experience rebound resistance due to the gap between it and the skirt 320. The negative pressure motor operates in the inner space of the skirt 320 to perform suction, resulting in the air pressure in the second separation space 720 being lower than the atmospheric pressure outside. As a hollow cavity connected to the outside, its internal air pressure is consistent with that of the outside. Due to the air pressure difference between the second separation space 720 and the hollow cavity, the elastic soft membrane 415 expands and presses against the second opening to eliminate the gap. It will not be difficult for the elastic soft membrane 415 to expand due to the hollow cavity's inability to freely exchange gas with the outside, or the elastic soft membrane 415's own deformation resistance will result in an insufficient expansion distance to eliminate the gap.

[0068] In other embodiments, when the bottom cover 200 is closed due to factors such as the inclination of the skirt 320 installation or the inclination of the sealing surface, and the negative pressure motor is not working, the contact surface 411 of the sealing component 400 is in partial interference contact with the skirt 320, resulting in a partial gap. By setting the vent hole 460, it is possible to reduce the deformation resistance of the elastic soft membrane 415 when the skirt 320 and the elastic soft membrane 415 are in partial interference contact when the bottom cover 200 is closed, and also to ensure that the part of the elastic soft membrane 415 with a gap with the second opening 330 is absorbed and sealed by the vent hole 460 when the negative pressure motor is working, without increasing the deformation resistance of the elastic soft membrane 415.

[0069] As can be seen from the above, regardless of whether the skirt 320 and the contact surface 411 are interference fit, clearance fit, or partially interference and partially clearance fit, the hollow cavity 600 communicates with the outside world, enabling free gas exchange. This allows the elastic soft membrane 415 of the sealing component 400 to seal the second opening 330 in any of the above embodiments while reducing or even suppressing the reverse resistance generated by the elastic soft membrane 415 when sealing the skirt 320. As a result, under the action of the reset member 500, the bottom cover 200 automatically pivots from the open position to the closed position, realizing automatic closing operation without the need for external forces to provide additional closing force to the bottom cover 200.

[0070] As shown in Figure 9, the contact surface 411 of the sealing assembly 400 is an arc-shaped curved surface, specifically a concave arc-shaped curved surface that is lower in the middle and higher on the outer side. The overall area of ​​the contact surface 411 after being flattened is larger than the area of ​​the third opening 4211, thereby increasing the vertical movement distance of the elastic soft membrane 415 and reducing the resistance caused by its own elastic deformation during movement. Thus, by increasing the overall area of ​​the contact surface 411, the vertical movement distance is increased, thereby reducing the deformation resistance formed by the elasticity of the elastic part 410 itself. In other embodiments, the contact surface 411 of the sealing assembly 400 can also be a convex arc-shaped surface that is higher in the middle and lower on the outer side.

[0071] Figure 10 is an exploded view of the sealing assembly provided in an embodiment of this application from one perspective, and Figure 11 is an exploded view of the sealing assembly provided in an embodiment of this application from another perspective. Referring to Figures 8-11, the support portion 420 has a bottom wall 4213 and an annular side wall 4214 extending upward from the bottom wall 4213. The bottom wall 4213 and the annular side wall 4214 together form the inner cavity of the support portion 420. The annular side wall 4214 and the bottom wall 4213 form the first support section 421 of the support portion 420, so that the elastic portion 410 can be wrapped and fitted onto the first support section 421 for fixation. The upper end of the annular side wall 4214 forms the third opening 4211, and the bottom wall 4213 has a vent hole 460 penetrating the bottom wall 4213 at its central position.

[0072] The inner cavity of the support portion 420 may also include a second support section 422, which extends upward from the bottom wall 4213 and does not exceed the annular sidewall 4214. The second support section 422 is arranged around the vent hole 460. The second support section 422 is located inside the annular sidewall 4214 of the first support section 421, and the height of the second support section 422 in the vertical direction is lower than the height of the annular sidewall 4214 of the first support section 421. The second support section 422 supports the central position of the elastic membrane 415 of the elastic portion 410 upward, so as to prevent the elastic membrane 415 from collapsing excessively downward in its natural state, or from being abutted excessively downward by the skirt 320, which would block the vent hole 460 and thus affect the free entry and exit of external gas into the hollow cavity 600 of the sealing assembly 400, thereby increasing the internal air pressure of the hollow cavity 600. The arrangement of the second support section 422 helps to ensure that the hollow cavity 600 is freely connected with the external gas. There are three second support sections 422 arranged at intervals around the vent 460. The top of each second support section 422 can support the inner surface of the elastic membrane 415 of the elastic part 410. When the elastic membrane 415 of the elastic part 410 retracts downward and fits with the top of the second support section 422, the gap between adjacent second support sections 422 can ensure that the hollow cavity 600 can freely exchange with the external gas through the vent 460.

[0073] As shown in the embodiment of Figure 9, the vent 460 is centrally located in the center of the bottom wall 4213, and there is only one vent. However, in other embodiments, multiple vents 460 can be provided on the bottom wall 4213 and arranged as needed. To prevent foreign objects from entering the hollow cavity 600 through the vent 460 and damaging the elastic membrane 415, the aperture of the vent 460 can be reduced to prevent foreign objects from entering the hollow cavity 600 and damaging the elastic membrane 415. While reducing the aperture of the vent 460, the number of vents 460 is increased to ensure gas flow between the hollow cavity 600 and the outside, so that the gas inside the hollow cavity 600 can be discharged in a timely manner through a large number of small-aperture vents 460.

[0074] The support portion 420 has a top surface 440 and a bottom surface 450 arranged opposite each other in the vertical direction. The top surface 440 is the top surface of the annular sidewall 4214 of the first support section 421. The support portion 420 extends further downward from its bottom surface 450 to form a plurality of annularly spaced locking segments 470, which are fixed to the through hole 210. The diameter of the circle formed by the annularly spaced locking segments 470 is smaller than the diameter of the circular inner cavity formed by the annular sidewall 4214. A stepped surface 480 is formed between the locking segments 470 and the annular sidewall 4214 of the first support section 421. The stepped surface 480 is located on the outer periphery of the locking segments 470 and is arranged downward, and is a part of the bottom surface 450 near its outer edge. The elastic part 410 is fitted onto and wraps around the outer side of the top of the support part 420. Specifically, the elastic part 410 wraps around the annular sidewall, and the elastic part 410 is attached to the top surface 440 and the stepped surface 480. This arrangement ensures the sealing of the elastic part 410 to the third opening 4211, preventing gas inside the dust collection device 1000 from escaping to the outside through the third opening 4211. At the same time, the top surface 440 of the support part 420 supports the top surface (contact surface 411) of the elastic part 410 to maintain its shape; the stepped surface 480 of the support part 420 restricts the bottom position of the elastic part 410 to facilitate positioning and assembly, and also ensures the stability of the elastic part 410 fixed on the support part.

[0075] Referring to Figures 8 and 9, the elastic membrane 415 of the elastic portion 410 includes a sealing portion 412 located in the center and sealing the second opening 330, and a peripheral portion 413 extending outward from the sealing portion 412. The second support section 422 supports the central position of the sealing portion 412 upward, while the annular sidewall 4214 of the first support section 421 supports the peripheral portion 413 upward. At least a portion of the peripheral portion 413, together with the sealing portion 412, forms a hollow cavity 600 with the inner cavity of the support portion 420. The peripheral portion 413 is formed by extending outward and downward at an angle from the sealing portion 412. As shown in Figure 9, a portion of the peripheral portion 413 adjacent to the sealing portion 412, together with the sealing portion 412, seals the third opening 4211 of the support portion 420. The outer surface of the sealing portion 412 is the contact surface 411 of the sealing assembly 400. That is, the top surface 440 of the annular sidewall 4214 of the first support section 421 abuts against the outer periphery 413 at a position below the connection between the outer periphery 413 and the sealing part 412. A portion of the upper end of the outer periphery 413 is higher than the top surface 440 and does not abut against the annular sidewall 4214, thereby raising the position of the sealing part 412 connected to the upper end of the outer periphery 413. At the same time, the portion of the upper end of the outer periphery 413 that is not abutted increases the distance that the sealing part 412 can move up and down in the vertical direction, and the increased distance will not cause the sealing part 412 to deform and increase the closing resistance of the bottom cover 200.

[0076] Referring again to Figures 8 and 9, vertically, the second opening 330 is located directly above the contact surface 411, and the projection surface of the second opening 330 lies within the projection surface of the contact surface 411 of the sealing assembly 400. On the horizontal plane, the area of ​​the contact surface 411 of the sealing assembly 400 is larger than the area of ​​the second opening 330 of the skirt 320; the area of ​​the sealing part 412 on the horizontal plane is larger than the area of ​​the second opening 330 on the horizontal plane. By setting the area of ​​the sealing part 412 to be larger than the area of ​​the second opening 330, it is possible to avoid the second opening 330 of the skirt 320 not being completely covered due to deviations during coaxial installation of the skirt 320 and the dust collection device 1000, and to prevent the outline of the second opening 330 from being irregular and non-circular due to manufacturing issues, instead being elliptical or having other contours that prevent complete coverage, thereby reducing the coaxial installation accuracy and processing accuracy requirements of the skirt 320.

[0077] The top surface 440 of the support portion 420 includes an outwardly and downwardly extending beveled surface 441 and an arc transition surface 442, the arc transition surface 442 connecting the beveled surface 441 and the inner cavity surface of the hollow cavity 600. The beveled surface 441 disperses the supporting force of the top surface 440 of the support portion 420 on the contact point with the outer periphery 413 of the elastic portion 410, facilitating vertical sliding on the outer periphery. When the sealing portion 412 is pressed downwards by the skirt, the beveled surface 441 converts the downward pressure F of the elastic soft membrane 415 onto it into a portion of a vertically downward pressure f1 and a portion of a horizontally outward force f2 (see Figure 9), thereby reducing the reverse supporting force of the top surface 440 of the support portion 420 on the elastic soft membrane 415 under pressure, and further reducing the resistance of the sealing assembly 400 when sealing the second opening 330 of the skirt 320. In other embodiments, the annular sidewall 4214 of the first support section 421 may abut upward against the connection between the sealing portion 412 and the peripheral portion 413.

[0078] Referring to Figure 8, the through hole 210 is a countersunk hole that is larger at the top and smaller at the bottom. The through hole 210 includes a first hole 211 that penetrates upward through the bottom cover 200 and a first hole 211 that communicates with and penetrates downward through the bottom cover 200. The diameter of the first hole 211 is larger than the diameter of the bottom cover 200. The locking section 470 of the support part 420 passes through the first hole 211 and is locked and fixed to the first hole 211 during installation. An upwardly arranged annular stepped surface is formed between the two holes 211. The stepped surface of the through hole 210 is arranged opposite to the stepped surface 480 of the support part 420, and at least a portion of the elastic part 410 is clamped between the stepped surface of the through hole 210 and the stepped surface 480 of the support part 420 to form a seal.

[0079] Referring to Figures 8 and 9, the elastic portion 410 may include a lip extending further outward from the peripheral portion 413. This lip surrounds the peripheral portion 413 to form an outwardly protruding portion 414. The diameter of this annular outwardly protruding portion 414 is larger than the maximum diameter of the through hole 210, and it abuts against the inner surface of the bottom cover 200 located on the outer periphery of the through hole 210. This seals the opening at the top of the through hole 210 through the elastic portion 410, preventing the dust collection device 1000 from communicating with the outside through the through hole 210 of the bottom cover 200. At the same time, the elastic portion of the stepped surface 480 attached to the support portion 420 presses downward against the stepped surface of the through hole 210. The sealing of the through hole 210 by the two-part sealing arrangement of the outwardly protruding portion 414 and the elastic portion 410 at the stepped surface 480 ensures the sealing performance of the sealing assembly 400.

[0080] Referring to Figures 9-7, the vent 460 extends downward through the bottom wall. The sealing assembly 400 may also include a shielding portion 430 that shields the vent 460. This shielding portion 430 includes a plurality of connecting arms 432 extending downward from around the vent 460 of the support portion 420, and a bottom wall 431 connected to the lower ends of the connecting arms 432. The connecting arms 432 are arranged circumferentially at intervals. The bottom wall 431 of the shielding portion 430 is located directly below the fourth opening 4212 to shield the fourth opening 4212 and prevent foreign objects from passing through the vent 460 and entering the hollow cavity 600 of the sealing assembly 400, damaging the elastic membrane 415. A gap opening 433 communicating with the vent is formed between adjacent and spaced connecting arms 432. The opening 433 is horizontally open, allowing gas in the hollow cavity to pass through the vent and finally communicate with the outside through the opening 433. This allows the hollow cavity 600 to freely exchange gas with the outside world, while also ensuring that the lower surface of the elastic membrane 415 is completely covered by the support, preventing damage from foreign objects from the bottom side of the sealing assembly.

[0081] In addition to the connection method between the elastic membrane 415 and the through hole 210 described above, the two can also be connected in the manner shown in FIG13. Referring to FIG13, in another embodiment, the bottom cover 200 is provided with the through hole 210 and the elastic membrane 415' located inside the bottom cover 200 and covering the through hole 210. A hollow cavity 600 is formed between the elastic membrane 415' and the bottom cover 200, located below the elastic membrane 415'. The elastic membrane 415' may be at least partially raised towards the skirt 320 (not shown in the figure) and forming the hollow cavity 600 located below the elastic membrane 415', or it may be located on the upper side of the bottom cover 200 and have a generally flat or concave shape, and together with the bottom cover 200, form the hollow cavity 600. The hollow cavity 600 is isolated from the inner cavity of the vacuum cleaner housing 100 (not shown in the figure) by an elastic membrane 415', thus preventing the inner cavity of the housing 100 from communicating with the outside atmosphere through the through hole 210 of the bottom cover 200. When the elastic membrane 415' covers the second opening 330, the hollow cavity 600 communicates with the outside through the through hole 210 of the bottom cover 200. The support part 420 can be designed integrally with the bottom cover 200, and the elastic membrane 415' achieves the covering and sealing of the through hole 210 by fixing it to the bottom cover 200 (or the support part 420).

[0082] In addition to sucking up dirt, the suction nozzle 2000 has multiple functions. An LED green light is located in the middle of the front face of the nozzle in the forward direction to illuminate dust on the ground. The angle between the two edges of the illuminated surface is 120°. Near the rear face of its two outer side walls, the nozzle 2000 has a detection device to check if it is close to a wall. This device can be an infrared sensor. When the distance between one side wall of the nozzle and the wall is less than a certain threshold, the sensor sends a signal to increase the suction power of the nozzle, enabling side suction of dirt from corners and edges of walls.

[0083] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0084] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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 indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A vacuum cleaner, comprising a vacuum cleaner body and a dust collection device, the dust collection device comprising a housing, a bottom cover pivotally connected to the housing, and a dust separator located within the housing; The dust separator has a skirt extending toward the bottom cover, and the free end of the skirt surrounds a second opening toward the bottom cover; Its features are, The bottom cover is provided with a sealing assembly that covers the second opening. The sealing assembly has an elastic soft membrane and a hollow cavity. The elastic soft membrane forms the top wall of the hollow cavity. The sealing assembly is also provided with a fourth opening to connect the outside world with the hollow cavity.

2. The vacuum cleaner according to claim 1, characterized in that, The vacuum cleaner also includes a negative pressure motor. When the negative pressure motor works to generate suction, the elastic membrane moves toward the skirt to press against and seal the second opening of the skirt.

3. The vacuum cleaner according to claim 1, characterized in that, In the vertical direction, the elastic membrane can expand outward and / or contract inward relative to the hollow cavity.

4. The vacuum cleaner according to claim 1, characterized in that, The hollow cavity includes a side wall and a bottom wall, and the sealing assembly is provided with a vent hole that penetrates the bottom wall and / or the side wall.

5. The vacuum cleaner according to claim 4, characterized in that, The sealing assembly includes a support portion and an elastic portion having the elastic membrane. The support portion has an inner cavity, which is formed by the side wall and the bottom wall. The elastic membrane of the elastic portion and the inner cavity of the support portion together form the hollow cavity of the sealing assembly.

6. The vacuum cleaner according to claim 5, characterized in that, The elastic part is shaped like a frustum, including a top surface of the frustum, a bottom surface of the frustum opposite to the top surface, and an inclined surface connecting the top surface and the bottom surface. The top surface of the frustum is a closed surface, and the bottom surface of the frustum has an opening for the support part to enter.

7. The vacuum cleaner according to claim 5, characterized in that, The support portion further includes a second support section extending upward from the bottom wall but not exceeding the side wall.

8. The vacuum cleaner according to claim 5, characterized in that, The support portion has a stepped surface adjacent to the sidewall and facing downwards, and the elastic portion wraps around the sidewall and is at least partially attached to the stepped surface.

9. The vacuum cleaner according to claim 8, characterized in that, The bottom cover has a through hole, and the sealing component is detachably installed into the through hole and seals the through hole; The through hole has an annular stepped surface that is disposed opposite to the stepped surface of the support portion; At least a portion of the elastic part is held between the annular stepped surface of the through hole and the stepped surface of the support part.

10. The vacuum cleaner according to claim 9, wherein the elastic portion extends outward to form an outward protrusion, the elastic portion seals the through hole and the outward protrusion abuts against the bottom cover surface on the outer periphery of the through hole.

11. The vacuum cleaner according to claim 5, characterized in that, The elastic membrane includes a sealing portion disposed opposite to the second opening and a peripheral portion extending outward and downward from the sealing portion, at least a portion of the peripheral portion together with the inner cavity of the sealing portion and the support portion to form the hollow cavity.

12. The vacuum cleaner according to claim 1, characterized in that, A reset member is also provided at the pivot connection between the bottom cover and the housing, and the reset member provides a closing force to the bottom cover toward the housing.

13. The vacuum cleaner according to claim 1, wherein the fourth opening is arranged in a vertical direction, the sealing assembly includes a blocking part that blocks the fourth opening, the blocking part having a bottom wall located directly below the fourth opening and a connecting arm connected between the bottom wall and the support part, and the blocking part further having an opening communicating with the outside in a horizontal direction perpendicular to the vertical direction.

14. A dust collection device, comprising a housing having an inner cavity, a bottom cover pivotally connected to the bottom of the housing, and a dust separator disposed in the inner cavity of the housing; The dust separator has a skirt extending toward the bottom cover, and the free end of the skirt surrounds a second opening toward the bottom cover; Its features are: The bottom cover is provided with a sealing assembly that seals the second opening. The sealing assembly has a hollow cavity, and the hollow cavity has an elastic soft membrane disposed toward the skirt edge and a fourth opening disposed away from the skirt edge. When the elastic membrane seals the second opening, the hollow cavity communicates with the outside through the fourth opening.

15. A dust collection device, comprising a housing having an inner cavity, a bottom cover pivotally connected to the bottom of the housing, and a dust separator disposed in the inner cavity of the housing; The dust separator has a skirt extending toward the bottom cover, and the free end of the skirt surrounds a second opening toward the bottom cover; Its features are: The bottom cover is provided with a sealing assembly for sealing the second opening. The sealing assembly has a support portion and an elastic portion sleeved on the top of the support portion. The support portion has an upward-opening inner cavity and a vent hole connecting the inner cavity of the support portion to the outside. The elastic portion has an elastic soft membrane that seals the opening of the inner cavity of the support portion. The elastic soft membrane and the inner cavity together constitute the hollow cavity of the sealing assembly. When the elastic soft membrane seals the second opening, the hollow cavity is connected to the outside through the vent hole.

16. A vacuum cleaner, comprising a vacuum cleaner body and a dust collection device, the dust collection device comprising a housing, a bottom cover pivotally connected to the housing, and a dust separator located within the housing; The dust separator has a skirt extending toward the bottom cover, and the free end of the skirt surrounds a second opening toward the bottom cover; Its features are, The bottom cover has a through hole and an elastic soft membrane located inside the bottom cover and covering the through hole; a hollow cavity is formed between the elastic soft membrane and the bottom cover, located below the elastic soft membrane; When the elastic membrane seals the second opening, the hollow cavity communicates with the outside through the through hole in the bottom cover.

17. A cleaning system, characterized in that, This includes base stations and vacuum cleaners as described in any one of claims 1-16.

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