Dust collector and dust collection system

Abstract

The utility model belongs to the field of dust collectors, and particularly provides a dust collector and a dust collection system, which can stably and reliably realize air path conversion for a long time through a simple structure. The dust collection system comprises a dust collector, a base station and a wind path conversion part; suction force is formed based on negative pressure generated by an electric fan in the dust collector, the dust collector forms a ground suction air path, and the dust collector and the base station are matched and connected to jointly form a clearance air path. The air path switching part is used for switching the ventilation states of the ground suction air path and the clearance air path and comprises a clearance air door which is arranged on the clearance air path and is used for opening and closing the air path, a ground suction air door which is arranged on the ground suction air path and is used for opening and closing the air path, and a switching piece which is connected with the movable part of each air door and is used for switching the two air doors into an open state and a closed state alternately; wherein the damper is provided such that, in the closed state, the closed surface side of the movable portion is at a position at which the air pressure is lower than that of the back surface side.

Description

Technical Field

[0001] The utility model belongs to the field of vacuum cleaners, and in particular relates to a vacuum cleaner and a dust collection system. Background Art

[0002] With the continuous expansion and updating of vacuum cleaning technology, full-featured, easy-to-store base station vacuum cleaners are becoming increasingly popular. The base station can not only store, dock and charge the vacuum cleaner, but also remove the dirt collected in the vacuum cleaner, bringing great convenience to users.

[0003] However, in order to achieve the dirt removal function, a vacuum motor is usually installed near the cleaning chamber in the base station, and the suction airflow generated by the vacuum motor quickly sucks the dirt in the vacuum cleaner into the dust bag in the cleaning chamber.

[0004] However, vacuum motors are heavy and expensive, which makes it inconvenient for users to move and increases costs.

[0005] Therefore, the motor-free base station without vacuum motor has become a hot topic of research. For example, Chinese patent document CN117502962A discloses a dust collecting station for vacuum cleaner without vacuum motor. The dust collecting station does not have a vacuum motor, but works based on the vacuum motor of the vacuum cleaner body. An air duct switching slider and a reset spring are arranged under the vacuum motor of the vacuum cleaner body, so that when the vacuum cleaner body is placed on the dust collecting station for dust collection, the reset spring does not deform, and the air duct switching slider can block the second air duct and switch to the base station for dust collection; when performing normal vacuuming, the reset spring is driven to deform, driving the air duct switching slider to block the first air duct and switch to the vacuum cleaner body for dust collection. However, during normal vacuuming, since the vacuum degree on the inner side of the air duct switching slider is much greater than the outer side to be blocked, the air duct switching slider (hereinafter referred to as the slider) is subjected to the continuous unblocking pulling force, which is more prone to air leakage and affects the dust collection performance. In addition, this solution uses a spring to apply push and pull force to the slider to switch the air duct, which is not stable enough. The spring is prone to failure after long-term use, resulting in failure to push and pull, causing air leakage at the blockage, or failure to effectively open the air duct, or even causing the air duct to fail to switch normally, affecting the dust suction and dust collection effects.

[0006] Chinese patent document CN219982787U discloses a single-vacuum source base station type vacuum cleaner with switchable air ducts. During self-cleaning, the first plug on the same side is lifted up through a trigger rod with a spring to open the base station air inlet below, and the second plug on the other side is pressed down to block the dust suction air inlet below, and the suction force of the vacuum source is used for self-cleaning; conversely, dust suction can be performed. Similarly, in this scheme, when the vacuum source is working, the vacuum degree on the blocked side is greater, thereby increasing the risk of air leakage. At the same time, in this scheme, whether in self-cleaning or dust suction state, the corresponding plug cannot be fully opened, and most of it is still blocked in the air path, hindering the airflow from flowing quickly to the motor and increasing wind resistance. In addition, this scheme also uses springs to apply force to achieve air duct switching, which is prone to failure.

[0007] In summary, the air duct switching structures in the prior art all have problems such as unstable structure, easy air leakage, easy failure, etc., and cannot meet the needs of users for long-term and stable use. Utility Model Content

[0008] The utility model is developed to solve the above-mentioned problem, and aims to provide a dust collector and a dust collection system, which can realize the air path conversion in a long-term, stable and reliable manner through a simple structure.

[0009] In order to achieve the above purpose, the utility model adopts the following scheme:

[0010] <System>

[0011] The utility model provides a dust collection system, comprising: a vacuum cleaner, comprising an electric fan and a dust cup, wherein a ground suction air path is formed by the negative pressure generated by the electric fan, so that the airflow sucks dirt from the surface to be cleaned into the dust cup along the air path, thereby achieving surface cleaning; a base station, which is matched with the vacuum cleaner, and after being matched and connected with the vacuum cleaner, forms a bin cleaning air path together with the vacuum cleaner based on the negative pressure generated by the electric fan, so that the airflow sucks dirt from the dust cup along the air path, thereby achieving dust cup cleaning; an air path conversion part, which converts the ventilation states of the ground suction air path and the bin cleaning air path, comprising a bin cleaning air door arranged on the bin cleaning air path for opening and closing the air path, a ground suction air door arranged on the ground suction air path for opening and closing the air path, and a conversion part connected to the movable part of each air door for converting the two air doors into alternately open and closed states; wherein the air doors are arranged so that: in the closed state, the closed surface side of the movable part is in a position / area with lower air pressure than the back side.

[0012] The beneficial effects of the above scheme are:

[0013] Through the above structure, the dust suction damper and the warehouse cleaning damper are alternately opened and closed through the conversion part, so that the ground suction air path can be opened and the warehouse cleaning air path can be closed, or the warehouse cleaning air path can be opened and the ground suction air path can be closed. The vacuum cleaner and the base station share a vacuum source to achieve dust suction or warehouse cleaning; and, because the warehouse cleaning damper and the dust suction damper are both set to be in a closed state, the closed surface side of the movable part is at a position with lower air pressure (greater vacuum degree) than the back side. Therefore, in the closed state, and after the electric blower is turned on, whether it is the warehouse cleaning damper or the ground suction damper, the closed surface side of the damper is always subject to a greater suction force from the electric blower, so that it is closed more tightly. Without the need for the conversion part to provide a large blocking force, the air tightness of the closed surface side can be stably and reliably guaranteed to avoid air leakage.

[0014] Specifically, in the dust collection system provided by the utility model, each damper may include a damper plate and a door frame. When the damper plate and the door frame are in close contact, the corresponding damper is closed. When the damper is closed, the area where the damper plate and the door frame are in close contact with each other is a closed surface. The closed surface is provided with an elastic sealing member. The side where the closed surface is located on the damper plate or the door frame is a closed surface side. Either the damper plate or the door frame is a movable part, which can stably leave and approach the wind path, thereby realizing the opening and closing of the wind path. After the wind path is opened, the suction force generated by the negative pressure of the electric fan can be transmitted along the wind path to realize the suction of the ground or the cleaning of the warehouse.

[0015] Preferably, in the dust suction system provided by the utility model, the wind path conversion part comprises: a ventilation chamber, two door frames, two damper plates, and a guide rod; the ventilation chamber is arranged between the air inlet of the electric fan and the exhaust port of the dust cup, and the two door frames are arranged at intervals in the horizontal direction and divide the ventilation chamber into three chambers; the middle chamber has an upper opening opened toward the air inlet of the electric fan, and the two side chambers correspond to the ground suction air path and the warehouse cleaning air path respectively, and the bottom of each side chamber is provided with a lower opening connected to the corresponding air path; the two door frames respectively form ventilation openings of the two side chambers, and the ventilation openings are connected to the upper openings; the two damper plates are movably arranged in the two side chambers, respectively, and are arranged so that when the damper plate in one side chamber is in an air path closing position close to the door frame, the damper plate in the other side chamber is in an air path opening position away from the door frame; the guide rod is arranged as a conversion member to drive the two damper plates to move back and forth relative to the two door frames, so that the air paths corresponding to the two side chambers are alternately opened and closed.

[0016] The beneficial effects of the above scheme are:

[0017] The utility model arranges three chambers in the horizontal direction between the air inlet of the electric fan and the exhaust port of the dust cup, the middle chamber is communicated with the air inlet of the electric fan, two door frames separate the side chamber from the middle chamber and serve as two vents for the two side chambers and the middle chamber, the two damper plates only move back and forth relative to their own door frames in their own side chambers, thereby alternately closing one vent and opening the other vent, the guide rod can accurately and stably push and pull the damper plates, push or pull the damper plates in one side chamber until they are close to the door frame, while the damper plates in the other side chamber are away from the door frame, and the damper plates The closed surface where the plate and the door frame are in close contact is provided with an elastic seal; once the electric fan is turned on, among the three chambers, the gas flow rate in the middle chamber is the largest and the air pressure is the lowest, and the gas flow rate in the chamber of the closed vent is the smallest and the air pressure is the largest. The air pressure at the vent = the air pressure in the middle chamber > the air pressure in the side chamber of the closed vent. Based on the air pressure difference, the damper plate close to the door frame will be pressed closer to the door frame by the air pressure in the side chamber, and thus be closed more tightly. As the electric fan continues to run, the elastic seal at the closed surface is compressed and gradually adjusted to better fit the blocked gap, further improving the sealing effect, and the more it sucks, the tighter it becomes. In addition, the direction of force applied by the guide rod to press the damper plate against the door frame is consistent with the direction of the air pressure difference. The air pressure difference will not affect the structure and position stability of the guide rod during the pressing process, and will not cause the guide rod to deviate from the moving path. When the electric fan is turned off, the air pressure difference disappears, the closed surface will return to its initial state, and the damper plate can be easily moved away from the door frame, ensuring the stability and reliability of the air path conversion.

[0018] Furthermore, when the fine dust carried by the airflow encounters humid air, it is bonded by the moisture and accumulated in the ventilation chamber. Since the vent is closed, the closing surface is provided with an elastic seal. Therefore, even if the fine dust is bonded to the closing surface, the elastic seal can be deformed to fit and seal the gap. Especially after the electric fan is turned on, the sealing effect will become better and better, and a reliable seal can still be guaranteed. At the same time, after the air path is converted, the closing surface will become the windward surface and the bonded fine dust will be washed away by the airflow passing through.

[0019] Preferably, in the dust collection system provided by the utility model, the top of the middle chamber is at least 2 / 3 open, and among the three chambers, the volume and top area of ​​the middle chamber are the largest. Such an arrangement can make the middle chamber and the air inlet of the electric fan connected with a larger surface, so that the suction force can be better transmitted to the ventilation room, the wind path is less obstructed, and the electric fan can better perform its function.

[0020] Preferably, in the dust collection system provided by the utility model, the upper opening of the middle chamber + the lower openings of the two side chambers are ≥ 3 / 4 of the longitudinal cross-sectional area of ​​the ventilation chamber; the ventilation chamber spans the top of the dust cup. With such a configuration, the sum of the areas of the upper opening and the lower opening in the ventilation chamber is substantially equivalent to the longitudinal cross-sectional area of ​​the entire ventilation chamber, so that the effective ventilation area of ​​the ventilation chamber is maximized, further reducing wind path obstruction, improving ventilation effect, and improving the efficiency of floor suction and warehouse cleaning. The ventilation chamber spans the top of the dust cup to ensure that the airflow coming out of the top of the dust cup is subject to as little wind resistance as possible, and can enter the ventilation chamber efficiently and smoothly.

[0021] Preferably, in the dust collection system provided by the present invention, the area of ​​the lower opening is ≥ 4 / 5 of the cross-sectional area of ​​the side chamber, so that the lower opening is as open to the exhaust port of the dust cup as possible, thereby further reducing wind resistance.

[0022] Preferably, in the dust collection system provided by the utility model, the closed surfaces of the two dampers are arranged opposite to each other and both face the middle chamber; the closed surface of the damper plate or the closed surface of the door frame is provided with a circle of elastic sealing pads. The roughly symmetrical arrangement of the two dampers can make the structure and the movement process more stable, and the elastic sealing pads are simple and reliable as elastic sealing components.

[0023] Preferably, in the dust collection system provided by the utility model, in the closed state, an elastic sealing pad is provided in the area of ​​the damper plate corresponding to the closed surface, and the elastic sealing pad covers and exceeds the sealing surface area; the elastic sealing pad is embedded in the damper plate body and protrudes toward the door frame. This arrangement can reduce the difficulty of aligning the damper plate with the door frame for sealing, and makes the elastic sealing pad more firm and durable.

[0024] Preferably, in the dust collection system provided by the utility model, two bearing supports are arranged at intervals along the axial direction of the guide rod, one bearing support is located outside the ventilation chamber, and the other is located in the ventilation chamber, the bearing support includes a bracket and a bearing, the bracket supports the bearing, and the middle part of the bearing allows the guide rod to movably pass through and support the guide rod; the cross-sectional area of ​​the bracket of the bearing support located in the ventilation chamber is less than 1 / 4 of the cross-sectional area of ​​the chamber. Such a dual bearing support arrangement can make the moving path of the guide rod (relative to the ventilation chamber) more stable and accurate, and the damper plate can be moved more accurately and stably. In particular, even if the vacuum cleaner is accidentally dropped, the structure of the air path conversion part is stable and will not deviate relative to each other. In addition, the cross-sectional area of ​​the bearing support is small enough and will not affect the ventilation effect of the ventilation chamber. In addition, the bracket of the bearing support can also be made partially hollow to further reduce its cross-sectional area.

[0025] Preferably, in the dust collection system provided by the utility model, the upper and lower shells that enclose the ventilation chamber match the shapes and structures of the air inlet side of the electric fan and the exhaust side of the dust cup respectively; after the vacuum cleaner is matched and connected with the base station, the middle chamber and one side chamber overlap with the air inlet of the electric fan and the exhaust area of ​​the dust cup in an orthographic projection from top to bottom, and the lower opening of the other side chamber as a lower opening for clearing does not overlap with the exhaust area; the base station is provided with a clearing connection pipe matched with the vacuum cleaner, and the lower opening for clearing corresponds to the clearing connection pipe. In addition, the ventilation chamber overlaps with the air inlet of the electric fan and the exhaust area of ​​the dust cup, so that the ventilation chamber and the air inlet of the electric fan and the exhaust area of ​​the dust cup can be arranged more closely, so that the air path is the shortest, and the airflow quickly enters the electric fan from bottom to top. The arrangement of the lower opening for clearing can deliver the clearing airflow into the ventilation chamber more smoothly.

[0026] Preferably, in the dust collection system provided by the utility model, the damper plate and the door frame are arranged so that, when in the open state, the side facing the air path is roughly parallel to the mainstream direction (the dominant path direction or the shortest path direction in the air path flow direction) of the corresponding opened air path. Such an arrangement can minimize the obstruction of the air path when it is in the open state, and high-speed airflow can pass smoothly.

[0027] Preferably, in the dust collection system provided by the present invention, the moving paths of the guide rod and the damper plate are substantially parallel to the ground, which is more stable.

[0028] <Vacuum cleaner>

[0029] Furthermore, the utility model also provides a vacuum cleaner, which can independently form a ground suction air path and cooperate with the base station to form a warehouse cleaning air path, including an electric fan and a dust cup, and also includes an air path conversion part having any technical feature described in the above <Dust collection system>. Based on the same improved technology, the vacuum cleaner has the same beneficial effects as the <Dust collection system>.

[0030] In addition, the vacuum cleaner may further include a soft / hard extension tube (conductive tube) and a suction nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a dust collection system involved in an embodiment of the utility model;

[0032] Figure 2 It is a structural schematic diagram of a vacuum cleaner involved in an embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of a vacuum cleaner body involved in an embodiment of the utility model;

[0034] Figure 4 It is a cross-sectional view of the vacuum cleaner body involved in the embodiment of the utility model;

[0035] Figure 5 is a cross-sectional view of a vacuum cleaner according to an embodiment of the utility model;

[0036] Figure 6 It is a schematic diagram of the structure of a base station involved in an embodiment of the utility model;

[0037] Figure 7 is a cross-sectional view of a dust collection system according to an embodiment of the present utility model;

[0038] Figure 8 It is a schematic diagram of the path and flow direction of the bin cleaning air path RC in the dust collection system involved in the embodiment of the utility model;

[0039] Fig. 9 It is a structural schematic diagram of the wind path conversion mechanism involved in the embodiment of the utility model;

[0040] Fig.10 It is a schematic diagram of the internal structure of the air duct conversion mechanism involved in the embodiment of the utility model;

[0041] Fig.11 It is a cross-sectional view of the internal structure of the air duct conversion mechanism involved in the embodiment of the utility model;

[0042] Fig.12 It is a schematic diagram of the internal structure of the air duct conversion mechanism involved in the embodiment of the utility model after being turned upside down;

[0043] Fig.13 It corresponds to the dust collection state (RF conduction + RC closed) Figure 4 A partial enlarged view of

[0044] Fig.14 is Fig.13 The schematic diagram after marking the RF path and flow direction of the ground suction wind path;

[0045] Fig.15 Yes Fig.13 Schematic diagram after conversion to clearing state (RC on + RF closed);

[0046] Fig.16 Yes Fig.15 Adjust to a structural diagram viewed from bottom to top;

[0047] Fig.17 is Fig.15 The schematic diagram after marking the RC path and flow direction of the clearance airway;

[0048] Fig.18 It is a partial structural schematic diagram of the area where the air door plate of the vacuum cleaner involved in the modified example of the utility model is located;

[0049] Fig.19It is an enlarged cross-sectional view of the damper plate involved in the modified example of the utility model, wherein (a) and (b) are two different modified schemes respectively. DETAILED DESCRIPTION

[0050] The specific implementation scheme of the vacuum cleaner and the dust collection system involved in the utility model is described in detail below with reference to the accompanying drawings.

[0051] <Example>

[0052] like Figures 1 to 4 As shown, the dust collection system 1000 includes a dust collector 10 , a base station 20 and an air duct conversion unit 30 .

[0053] like Figure 2 and 5 As shown, the vacuum cleaner 10 is a cordless vacuum cleaner, which includes a vacuum cleaner body 11, an extension tube 12, and a suction nozzle 13. The vacuum cleaner body 11 is used to form a ground suction air path RF to absorb dirt on the surface to be cleaned. The rear end of the extension tube 12 is matched and connected with the vacuum cleaner body 11, and can extend the ground suction air path RF of the vacuum cleaner body 11 to the outside. The suction nozzle 13 is installed at the front end of the extension tube 12, facing and contacting the surface to be cleaned, and further guiding the ground suction air path to absorb dirt such as dust and hair on the surface to be cleaned.

[0054] like Figures 3-4 As shown, the vacuum cleaner body 11 includes a shell 111, an electric fan 112, a dust cup 113, a main body air inlet pipe 114, a main body connecting pipe 115, and an energy pack 116.

[0055] The outer shell 111 is used for installing the dust cup 113 , the main body air intake pipe 114 , the main body connecting pipe 115 , and the energy pack 116 .

[0056] The electric fan 112 is used to generate negative pressure, thereby providing suction force, forming a Figure 5 The ground suction wind path RF shown or Figure 8 In this embodiment, the air inlet of the electric fan 112 faces downward, and the air outlet is connected to the side opening 111a of the housing 111.

[0057] The dust cup 113 is connected to the electric fan 112 and is used to hold the dirt after dust and gas separation. In this embodiment, the dust cup 113 includes a cup body 113a, a bottom cover 113b, a bottom cover switch 113c and a main filter unit 113d. The cup body 113a is used to hold the filtered dirt. The bottom cover 113b is hinged to one side of the bottom of the cup body 113a, and the other side is sealed through the bottom cover switch 113c. The main filter unit 113d is used to further filter fine particle size dirt and discharge the clean airflow from the dust cup from the exhaust port 113e; in this embodiment, the main filter unit 113d is a multi-cone cyclone filter, and the corresponding exhaust port 113e is a plurality of outlets at the top of the cyclone filter.

[0058] The rear end of the main air inlet pipe 114 is connected to the dust cup 113 .

[0059] The main connecting pipe 115 is used to match and connect with the base station 20 after the vacuum cleaner main body 11 is placed on the base station 20, corresponding to the cleaning air path RC; when the vacuum cleaner main body 11 works independently, it is closed together with the cleaning air path RC.

[0060] The energy pack 116 is used to power the vacuum cleaner 10. In this embodiment, the energy pack 116 is a battery pack that can power the electric blower 112, the extension tube 12, and the suction nozzle 13. To prevent the energy pack 116 from running out of power and being unable to clean the vacuum after being returned to the base station, the voltage lower limit (cut-off voltage) in the protection circuit of the energy pack 116 can be set to be ≥ the voltage required to complete one automatic cleaning.

[0061] In the floor suction state, the vacuum cleaner 10 works independently, and a floor suction air path RF is formed in the vacuum cleaner body 11 from the main body air intake pipe 114 → the cup body 113a → the main body filter unit 113d → the air intake port of the electric fan 112.

[0062] like Figure 5 As shown, after the extension tube 12 and the suction nozzle 13 are connected, the ground suction air path RF is extended to: extension tube 12 → suction nozzle 13 → main body air intake pipe 114 → cup body 113a → main body filter unit 113d → electric fan 112 air intake.

[0063] like Figure 1 and 6 As shown, the base station 20 matches the vacuum cleaner 10, allowing the vacuum cleaner 10 to dock, store / place and charge the vacuum cleaner 10, and can form a cleaning air path RC based on the electric fan 112 to remove the dirt stored in the vacuum cleaner body. The base station 20 includes a base station body 21, a cleaning connection pipe 22, a charger 23, a backup energy pack 24, and a base 25.

[0064] like Figure 7As shown, the base station body 21 is a hollow structure, with a placement chamber 211 provided at the top, a dust bag 212 installed below the outlet of the placement chamber 211, a base station filter unit 213 for further cleaning the airflow provided below the dust bag 212, and the base station filter unit 213 below the inlet end of the base station exhaust duct 214, which extends upward from the inlet end along the outer wall of the base station filter unit 213 and the placement chamber 211. The placement chamber 211 matches the vacuum cleaner body 11, and can at least seal and accommodate the lower half of the dust cup 113. A protruding push block 211a is provided on the inner side of the placement chamber 211. When the dust cup 113 enters the placement chamber 211, the push block 211a correspondingly pushes the bottom cover switch 113c to open the bottom cover 113b. And the bottom of the placement chamber 211 is used as a sealed connection chamber 211b, and the space size should be larger than the bottom cover 113b, so that the bottom cover 113b can be fully opened as parallel to the mainstream air path as possible. The dust bag 212 is used to collect dirt in the dust cup when cleaning the warehouse. The inlet is sealed and connected to the air outlet of the placement cavity 211. After the bottom cover 113b is opened, it can be connected to the dust bag 212.

[0065] The cleaning connection pipe 22 extends upward from the outlet end of the base station exhaust duct 214 and extends out of the base station body 21 for a distance, matching the main body connection pipe 115, and allowing the main body connection pipe 115 to be inserted to form a sealed connecting pipe. In this embodiment, the cleaning connection pipe 22 is in contact with the main body connection pipe 115, and a sealing pad layer is provided at the contact surface.

[0066] The electrical output terminal 231 of the charger 23 is a spring pin. When the vacuum cleaner body 11 is placed on the base station 20, the contact piece of the energy pack 116 on the vacuum cleaner body 11 is in contact with the electrical output terminal 231, and the charger 23 charges the energy pack 116 of the vacuum cleaner body 11.

[0067] The backup energy pack 24 can be detachably placed in the pack box 216 on the bottom side of the base station body 21, so that when the original energy pack 116 of the vacuum cleaner 10 fails to work due to insufficient energy supply, the user can choose to use the backup energy pack 24 to replace the original energy pack 116, so that the vacuum cleaner 10 or the electric fan 112 can resume work immediately.

[0068] The base 25 is connected to the bottom of the base station body 21 to support and fix the base station body 21. The upper surface of the base 25 and the surface of the base station body 21 form a placement space that matches the suction nozzle 13, so that the suction nozzle 13 can be placed stably.

[0069] like Figure 8 As shown, in the cleaning state, the base station 20 cooperates with the vacuum cleaner body 11 to form a cleaning air path RC: main body air inlet pipe 114 → dust cup 113 → sealed connecting cavity 211b → dust bag 212 → base station filter unit 213 → base station exhaust duct 214 → main body connecting pipe 115 → electric fan 112 air inlet.

[0070] like Figures 4-5 As shown in FIGS. 8 to 12 , the air duct conversion unit 30 is used to convert the ventilation states of the floor suction air duct RF and the warehouse cleaning air duct RC. The air duct conversion unit 30 includes a ventilation chamber 31, a floor suction door frame 32, a warehouse cleaning door frame 33, a floor suction damper plate 34, a warehouse cleaning damper plate 35, a guide rod 36, a drive motor 37, and an eccentric wheel mechanism 38.

[0071] The ventilation chamber 31 is horizontally arranged between the electric fan 112 and the dust cup 113, and is in the shape of a flat hollow cylinder. The upper and lower shells surrounding the ventilation chamber 31 match the shape and structure of the air inlet side of the electric fan 112 and the exhaust side of the dust cup 113 respectively. The interior of the ventilation chamber 31 is divided into an intermediate chamber and two side chambers by the floor suction door frame 32 and the warehouse cleaning door frame 33. Fig.13 The three chambers shown are, from left to right, the ground suction side chamber 311, the middle chamber 312, and the warehouse cleaning side chamber 313. The middle chamber 312 has an upper opening 312a opened toward the air inlet of the electric blower 112, the ground suction side chamber 311 and the warehouse cleaning side chamber 313 correspond to the ground suction air path and the warehouse cleaning air path, respectively, and the bottoms of the ground suction side chamber 311 and the warehouse cleaning side chamber 313 are respectively provided with a ground suction opening 311a and a warehouse cleaning lower opening 313a connected to the ground suction air path RF and the warehouse cleaning air path RC, the ground suction opening 311a is open corresponding to the exhaust port 113e, and the warehouse cleaning lower opening 313a is open corresponding to the base station exhaust duct 214. In this embodiment, in order to better ventilate and more effectively transfer the suction force of the electric fan 112 to the upstream of the floor suction and warehouse cleaning air path, the ventilation chamber 31 spans the top of the dust cup 113, and the top of the middle chamber 312 is open 2 / 3. Among the three chambers, the volume and top area of ​​the middle chamber 312 are the largest; and the area of ​​the upper opening 312a + the area of ​​the two lower openings 311a and 313a> 3 / 4 of the longitudinal cross-sectional area of ​​the ventilation chamber 31. In addition, the side of the warehouse cleaning side chamber 313 away from the warehouse cleaning door frame 33 can also be opened to increase the ventilation area of ​​the warehouse cleaning air path.

[0072] The floor suction door frame 32 and the warehouse cleaning door frame 33 respectively form ventilation openings of the floor suction side chamber 311 and the warehouse cleaning side chamber 313 , and both ventilation openings are communicated with the upper opening 312 a .

[0073] The floor suction damper plate 34 and the warehouse cleaning damper plate 35 are movably arranged in the floor suction side chamber 311 and the warehouse cleaning side chamber 313, respectively, and the relative position relationship of the two damper plates is set so that when the damper plate in any side chamber is in the air path closing position close to the door frame, the damper plate in the other side chamber is just in the air path opening position away from the door frame. When the floor suction damper plate 34 is in the air path closing position close to the floor suction door frame 32, and the warehouse cleaning damper plate 35 is away from the warehouse cleaning door frame 33 and is in the air path opening position, then the warehouse cleaning air path RC is opened at this time, and the vacuum cleaner 10 enters the warehouse cleaning state; on the contrary, when the warehouse cleaning damper plate 35 is in the air path closing position, and the floor suction damper plate 34 is in the air path opening position, then the floor suction air path RF is opened at this time, and the vacuum cleaner 10 enters the floor suction state. The area where the damper plate and the door frame are in contact with each other when in the air path closing position is recorded as a closed surface, and the closed surface is provided with an elastic sealing member. In this embodiment, the closed surfaces of the two damper plates are arranged opposite to each other and both face the middle chamber 312; a circle of elastic sealing pads 344 or 354 is provided on the closed surface of the damper plate or the closed surface of the door frame, and the elastic sealing pads 344 or 354 cover and exceed the closed surface area (exceed the fitting area between the damper plate and the door frame), so as to better cover and fit the door frame; in this embodiment, the elastic sealing pads 344 and 354 are fixed on the closed surface of the corresponding damper plate and protrude toward the door frame, and a circle of slightly raised limiting ribs 345 and 355 are respectively provided at the inner circle positions of the two damper plates corresponding to the elastic sealing pads 344 and 354. In addition, a circle of top ribs is provided on the edge of the closed surface of the door frame to further enhance the sealing effect.

[0074] Furthermore, in order to make the air path conversion process more stable and reliable, a limiter can be provided in the door frame. Fig.16 As shown, corresponding ground suction door opening limiting structures 311b and warehouse clearance door opening limiting structures 313b are arranged on the left side of the underground suction opening 311a and the right side of the warehouse clearance lower opening 313a. When the damper is in the open state (fully open), the back side of the corresponding damper plate contacts the corresponding door opening limiting structures. The ground suction door opening limiting structure 311b is arranged near the left side of the underground suction opening 311a, and is a baffle plate parallel to the back side 342, which limits the moving range of the ground suction damper plate 34; the warehouse clearance door opening limiting structure 313b is arranged near the right side of the warehouse clearance lower opening 313a, and is a baffle frame corresponding to the back side 352, which limits the moving range of the warehouse clearance damper plate 35.

[0075] The guide rod 36 is configured to drive the two damper plates to move back and forth relative to the two door frames under the drive of the drive motor 37, so that the air paths corresponding to the two side chambers are alternately opened and closed, thereby converting the air paths. The guide rod 36 is coaxially connected to the ground suction damper plate 34 and the warehouse cleaning damper plate 35 in sequence along the axial direction. The ground suction damper plate 34 is arranged in the middle of the guide rod 36, and the warehouse cleaning damper plate 35 is arranged at the right end of the guide rod 36. The guide rod 36 is sealed with the two damper plates, and a sealing ring is provided at the connection. In this embodiment, the cross section of the guide rod 36 is circular, and each damper plate extends from the middle of the closed surface side 341 / 351 (the side where the closed surface is located) to form a sealing pipe section 343 / 353 that fits the side of the guide rod 36 to make the sealing area larger. The guide rod 36 and each damper plate are sealed by three sealing rings 361 arranged at the two end faces and approximately the middle of the sealing pipe section 343 / 353. In this embodiment, in the cleaning state (the vacuum cleaner 10 is placed on the base station 20 and fixed in position), the guide rod 36 is basically parallel to the ground or the horizontal plane, and the moving paths RM of the guide rod 36, the ground suction damper plate 34, and the cleaning damper plate 35 are all parallel to the ground or the horizontal plane.

[0076] In order to further improve the stability and reliability of the movement of the guide rod 36, the utility model is provided with bearing supports between the drive motor 37 and the adjacent ground suction side chamber 311, and between the ground suction side chamber 311 and the warehouse cleaning side chamber 313. The bearing supports include a bracket 362 and a bearing 363. The bracket 362 supports the bearing 363, and the middle of the bearing 363 allows the guide rod 36 to movably pass through and support the guide rod 36. The cross-sectional area of ​​the bracket 362 of the bearing support located between the ground suction side chamber 311 and the warehouse cleaning side chamber 313 is less than 1 / 4 of the cross-sectional area of ​​the chamber, and both the cross-sectional area and the longitudinal cross-sectional area should meet the above conditions. In this embodiment, if Fig.16 As shown, between the floor suction side chamber 311 and the warehouse cleaning side chamber 313, the rod bracket 362 and the bearing 363 only occupy a small space, the maximum width of the bracket 362 corresponds to the width of the short axis of the black ellipse in the figure, the width of the bracket 362 is slightly larger than the bearing 363, and the two side areas of the bracket 362 in the width direction are open to form a large air duct for smooth airflow.

[0077] The drive motor 37 is independently arranged and does not directly contact the ventilation chamber 31, and is an independent structure. Fig.13 As shown, the drive motor 37 is located on the right side of the ventilation chamber 31, and the two are separated by a thick frame structure. The drive motor 37 converts the rotational motion into a push-pull force parallel to the axial direction of the guide rod 36 through the eccentric wheel mechanism 38 and outputs it to the guide rod 36. The output shaft of the drive motor 37 is inserted into the center hole 381a of the eccentric wheel mechanism 38. The drive motor 37 used in this embodiment is a micro rotary motor with a power of about 10W.

[0078] The drive motor 37 can be provided with a manual switch, allowing the user to manually operate the drive motor 37 to rotate 180° to the clearance position ( Fig.11 The eccentric shaft 381b rotates from the leftmost side to the rightmost side), and then after the cleaning is completed, it is turned on and rotated 180° to reset to the ground suction position (the eccentric shaft 351b rotates from the rightmost side to the leftmost side). A Hall sensor switch structure can also be used to realize the automatic start switch. A Hall sensor and a magnet are respectively set on the base station 20 and the vacuum cleaner body 11. After the vacuum cleaner body 11 is placed on the base station, the magnet approaches and activates the Hall sensor, generating a power-on signal, thereby automatically turning on the drive motor 37 and rotating it to the cleaning position and stopping. After the drive motor 37 is kept in the cleaning position for a period of time (the time required for cleaning) through the timing switch circuit, a power-on signal is generated to rotate the drive motor 37 back to the ground suction position; or when the vacuum cleaner body 11 leaves the base station 20, the magnetic field disappears, and the Hall sensor enters the inactivated state from the activated state. The drive motor 37 uses this change signal as a power-on signal to rotate back to the ground suction position to achieve reset.

[0079] like Figures 10-12 As shown, the eccentric mechanism 38 is used to convert the input rotational driving force into a push-pull driving force for horizontal reciprocating movement, and the output end is connected to the guide rod 36. The eccentric mechanism 38 includes an eccentric wheel 381 and a connecting member 382. The eccentric wheel 381 is disc-shaped, and has a center hole 381a and an eccentric shaft 381b on both sides. The center hole 381a is located at the center of the disc and is used to install the output shaft of the drive motor 37; the eccentric shaft 381b is connected to the guide rod 36 through a connecting member 382. The connecting member 382 includes an axis connecting portion 382a and a rod connecting portion 382b; the axis connecting portion 382a is provided with a limiting slide 382a-1 for matching and installing the eccentric shaft 381b, the width of the limiting slide 382a-1 is equivalent to the diameter of the eccentric shaft 381b, and the length is several times larger than the diameter of the eccentric shaft 381b, so that the eccentric shaft 381b can slide in the direction perpendicular to the moving direction of the guide rod 36, and output the push and pull force of the connecting member 382 along the axial direction of the guide rod 36; the rod connecting portion 382b is arranged between the axis connecting portion 382a and the input end of the guide rod 36 (the left end in the figure), and is connected to the two respectively. The eccentric wheel has a simple and reliable structure, and can stably convert the rotational driving force of the driving motor into continuous thrust and pull, and ensure the accuracy of displacement during the pushing and pulling process.

[0080] Based on the above structure, the specific working process of the dust collection system 1000 provided in this embodiment is as follows:

[0081] like Figure 2 , 4, 5 and 13-14, when the user performs floor vacuuming, the vacuum cleaner 10 is used independently (separated from the base station 20), and the suction nozzle 13 is directed toward the surface to be cleaned. The vacuum cleaner 10 is in the floor vacuuming state, the floor vacuuming damper plate 34 is in the air path opening position, its back side 342 is in contact with the floor vacuuming door opening limit structure 311b, the floor vacuuming side chamber 311 is ventilated, and the floor vacuuming air path RF is opened; at the same time, the cleaning damper plate 35 is in the air path closing position, the closing side 351 is in contact with the cleaning damper frame 332 to close, the cleaning side chamber 313 is not ventilated, and the cleaning air path RC is closed. After the user turns on the electric fan 112, the electric fan 112 continuously generates negative pressure, so that the external air carrying dirt such as hair and dust enters the suction nozzle 13, then enters the extension tube 12, then enters the main air inlet pipe 114, and then enters the dust cup 113. The hair, dust and other dirt are separated and filtered, and the filtered gas enters the suction side chamber 311 upward from the exhaust port 113e, and then flows into the middle chamber 312 from the vent of the suction side chamber 311, and enters the air inlet of the electric fan 112 from the upper opening 312a, and finally exits the housing 111 from the air outlet of the electric fan 112. At the same time, during the operation of the electric fan 112, the air pressure difference between the cleaning side chamber 313 and the middle chamber 312 helps to compress the cleaning air door plate 35, ensuring the sealing of the cleaning air path RC, thereby ensuring that the suction work is efficient, stable and reliable.

[0082] like Figure 1 , 6As shown in Figures 10 to 15 to 17, when the user finishes vacuuming, turns off the electric fan 112, and places the vacuum cleaner 10 on the base station 20, the bottom cover 113b is opened, the suction nozzle 13 faces the surface of the base 25, the drive motor 37 is turned on, the output shaft rotates 180°, and the guide rod 36 is driven to move to the right through the eccentric wheel mechanism 38, so that the cleaning damper plate 35 is moved away from the cleaning damper frame 332, until the back side 352 of the cleaning damper plate 35 contacts the cleaning door opening limiting structure 313b, the cleaning damper plate 35 is in the air path opening position, the cleaning side chamber 313 is ventilated, and the cleaning air path RC is connected; at the same time, the suction damper plate 34 is moved from the suction door opening limiting structure 311b to the closed side 341 to contact the suction damper frame 322, the suction damper 32 is in the air path closing position, the suction side chamber 311 is not ventilated, and the suction air path RF is closed; the cleaning state is entered. After the electric fan 112 is turned on, negative pressure is continuously generated, so that external air enters the suction nozzle 13, then enters the extension tube 12, then enters the main air inlet pipe 114, and then enters the dust cup 113, and sends the dirt in the dust cup 113 into the dust bag 212. The dust bag 212 filters and collects the dirt. The filtered gas flows out of the dust bag 212 and enters the base station filter unit 213 for further filtration. The filtered gas enters the base station exhaust duct 214, and then goes up along the base station exhaust duct 214 to enter the main connecting pipe 115, and then goes up through the open warehouse cleaning damper plate 35 to enter the air inlet of the electric fan 112, and is discharged from the housing 111 from the air outlet of the electric fan 112. At the same time, during the operation of the electric fan 112, the air pressure difference between the ground suction side chamber 311 and the middle chamber 312 helps to press the ground suction damper plate 34, ensuring the sealing of the ground suction air path RC, thereby ensuring that the warehouse cleaning work is carried out efficiently, stably and reliably.

[0083] After the cleaning is completed, the electric fan 112 is turned off. The next time the vacuum cleaner 10 is moved away from the base station 20, the drive motor 37 is turned on to rotate 180 degrees to reset, and at the same time, the eccentric wheel mechanism 38 drives the guide rod 36 to move leftward until the floor suction damper plate 34 is in the air path opening position, and the cleaning damper plate 35 is in the air path closing position, and the vacuum cleaner 10 enters the floor suction state.

[0084] In summary, in the vacuum cleaner and vacuum system involved in this embodiment, the ground suction air path portion formed between the air inlet of the electric blower and the exhaust port of the dust cup, and the cleaning air path portion between the air inlet of the electric blower and the cleaning connecting pipe outlet of the base station are basically the shortest straight lines, so that the airflow path is the shortest and the obstruction is minimal. Furthermore, the guide rod provides stable push-pull force and accurate displacement, the unique chamber and the two sets of damper plates and door frames, as well as the elastic sealing parts at the closed surface play a sealing compensation role. After the electric fan is running, there is always airflow in the middle chamber and it circulates at high speed. The air pressure is always the lowest, while the air pressure in the side chamber is higher. The air pressure difference between different chambers assists in closing the damper plates, so that the vacuum cleaner and dust collection system of this scheme have the simplest, most reliable and most stable wind path conversion structure, which can effectively avoid the influence of the environment and abnormal conditions, such as high air humidity, occasional falling or collision, and forgetting to install the filter on the dust cup. These conditions will not affect the smooth wind path conversion of this scheme. The vacuum cleaner and dust collection system of this scheme can meet the user's reliable and stable use and are durable.

[0085] <Modification>

[0086] In this modification, the same symbols are given to the same structures as those in the embodiment, and the same description is omitted.

[0087] In the above embodiment, a circle of raised limiting ribs 345 and 355 are respectively provided at the inner circle positions of the corresponding elastic sealing pads 344 and 354, so as to facilitate the fixing of the elastic sealing pads 344 and 354. However, in order to make it easier to align the damper plate and the door frame, the limiting ribs can also be removed. Fig.18 As shown, in this variation, no limiting ribs may be provided at the inner ring positions of the elastic sealing pads 344I and 354I, and the widths of the elastic sealing pads 344I and 354I may be increased, which is more conducive to the alignment and sealing of the damper plate and the door frame.

[0088] Furthermore, in order to facilitate the counter-rotation and ensure that the elastic sealing pad is fixed in position and easy to assemble in place, the elastic sealing pad is prevented from being separated from the surface of the damper plate body. Fig.19 As shown in (a), a groove is provided on the main body 350II of the warehouse cleaning damper plate, and the elastic sealing pad 354II is embedded and fixed in the groove. The elastic sealing pad on the floor suction damper plate is provided in the same manner.

[0089] Going a step further, Fig.19 As shown in (b), in order to further reduce the difficulty of alignment and improve the sealing effect at the closed surface, the width of the elastic sealing pad 354III can be extended to cover the entire warehouse clearance damper plate body 350III, with only the middle opening to allow the guide rod 36 to pass through. The elastic sealing pad on the ground suction damper plate is set in the same way.

[0090] The above embodiments and variations are merely examples of the technical solution of the utility model. The vacuum cleaner and vacuum system involved in the utility model are not limited to the contents described in the above embodiments, but are subject to the scope defined by the claims. Any modification, supplement or equivalent replacement made by technicians in the field of the utility model on the basis of this embodiment is within the scope of protection required by the claims of the utility model. For example, in this solution, the inlet end of the exhaust duct of the base station can also be located on the side of the base station body.

Claims

1. A dust collection system, characterized in that: include: A vacuum cleaner, comprising an electric fan and a dust cup, wherein the negative pressure generated by the electric fan forms a ground suction air path, allowing the airflow to suck dirt from the surface to be cleaned into the dust cup along the air path; A base station is matched with the vacuum cleaner, and after being matched and connected with the vacuum cleaner, forms a cleaning air path together with the vacuum cleaner based on the negative pressure generated by the electric fan, so that the airflow sucks the dirt from the dust cup along the air path; an air passage conversion unit for converting the ventilation states of the ground suction air passage and the warehouse cleaning air passage, including a warehouse cleaning air door provided on the warehouse cleaning air passage for opening and closing the air passage, a ground suction air door provided on the ground suction air passage for opening and closing the air passage, and a conversion member connected to a movable part of each air door for converting the two air doors into alternately open and closed states; Each of the dampers is configured such that, in a closed state, the closed surface side of the movable part is at a position with a lower air pressure than the back surface side.

2. The dust collection system according to claim 1, characterized in that: in, Each of the dampers includes a damper plate and a door frame. When the damper plate and the door frame are in close contact, the corresponding damper is closed. When the damper is closed, the area where the damper plate and the door frame are in close contact with each other is a closed surface, and the opposite side of the closed surface is a back side. The closed surface is provided with an elastic sealing member, and the side of the damper plate or the door frame where the closed surface is located is the closed surface side.

3. The dust collection system according to claim 1, characterized in that: in, The wind path conversion part includes: a ventilation chamber, two door frames, two air damper plates, and a guide rod; The ventilation chamber is arranged between the air inlet of the electric fan and the exhaust port of the dust cup, and the two door frames are arranged at intervals in the horizontal direction and divide the ventilation chamber into three chambers; the middle chamber has an upper opening opened toward the air inlet of the electric fan, and the two side chambers correspond to the ground suction air path and the warehouse cleaning air path respectively, and the bottom of each side chamber is provided with a lower opening connected to the corresponding air path; The two door frames respectively form ventilation openings of the two side chambers, and the ventilation openings are communicated with the upper opening; the two damper plates are respectively movably arranged in the two side chambers, and are arranged so that when the damper plate in one side chamber is in a wind path closing position close to the door frame, the damper plate in the other side chamber is in a wind path opening position away from the door frame; The guide rod is configured as the conversion member to drive the two air damper plates to move back and forth relative to the two door frames, so that the air passages corresponding to the two side chambers are alternately opened and closed.

4. The dust collection system according to claim 3, characterized in that: in, The top of the middle chamber is at least 2 / 3 open, and among the three chambers, the volume and top area of ​​the middle chamber are the largest.

5. The dust collection system according to claim 3, characterized in that: in, The area of ​​the upper opening + the area of ​​the two lower openings is ≥ 3 / 4 of the longitudinal cross-sectional area of ​​the ventilation chamber; the ventilation chamber spans the top of the dust cup.

6. The dust collection system according to claim 3, characterized in that: in, The closed surfaces of the two damper plates are arranged opposite to each other and both face the intermediate chamber; the closed surface of the damper plate or the closed surface of the door frame is provided with a circle of elastic sealing pad.

7. The dust collection system according to claim 3, characterized in that: in, In the closed state, an elastic sealing pad is provided on the closed surface area of ​​the damper plate, and the elastic sealing pad covers and exceeds the closed surface area; the elastic sealing pad is embedded on the damper plate body and protrudes toward the door frame.

8. The dust collection system according to claim 3, characterized in that: in, Along the axial direction of the guide rod, two bearing supports are spaced apart, one bearing support is located outside the ventilation chamber, and the other is located in the ventilation chamber, the bearing support includes a bracket and a bearing, the bracket supports the bearing, and the middle part of the bearing allows the guide rod to movably pass through and support the guide rod; the cross-sectional area of ​​the bracket of the bearing support located in the ventilation chamber is less than 1 / 4 of the cross-sectional area of ​​the chamber.

9. The dust collection system according to claim 3, characterized in that: in, The upper and lower shells that enclose the ventilation chamber are matched with the shapes and structures of the air inlet side of the electric fan and the exhaust side of the dust cup respectively; after the vacuum cleaner is matched and connected with the base station, the middle chamber and one of the side chambers overlap with the air inlet of the electric fan and the exhaust area of ​​the dust cup in an orthographic projection from top to bottom, and the lower opening of the other side chamber serves as a lower opening for clearing the warehouse and does not overlap with the exhaust area; The base station is provided with a bin cleaning connection pipe matched with the vacuum cleaner, and the bin cleaning lower opening corresponds to the bin cleaning connection pipe.

10. The vacuum cleaner can independently form a ground suction air path and cooperate with the base station to form a warehouse cleaning air path, including: The electric fan and dust cup are characterized by further comprising: an air passage conversion unit for converting the ventilation states of the ground suction air passage and the warehouse cleaning air passage, including a warehouse cleaning air door provided on the warehouse cleaning air passage for opening and closing the air passage, a ground suction air door provided on the ground suction air passage for opening and closing the air passage, and a conversion member connected to a movable part of each air door for converting the two air doors into alternately open and closed states; Wherein, the damper is arranged so that, in a closed state, the closed surface side of the movable part is at a position with lower air pressure than the back surface side.

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