Vacuum cleaner and dust collection system

Abstract

The present invention relates to the field of vacuum cleaners, and specifically provides a vacuum cleaner and a dust collection system, which can achieve airflow path switching stably and reliably for a long time by means of a simple structure. The dust collection system comprises a vacuum cleaner, a base station, and an airflow path switching portion. A suction force is formed on the basis of negative pressure generated by an electric fan in the vacuum cleaner, the vacuum cleaner forms a floor suction airflow path, and the vacuum cleaner and the base station are connected in a matching manner and then jointly form a dust container emptying airflow path. The airflow path switching portion is used for switching ventilation states of the floor suction airflow path and the dust container emptying airflow path, and comprises a dust container emptying damper provided on the dust container emptying airflow path and opening and closing the dust container emptying airflow path, a floor suction damper provided on the floor suction airflow path and opening and closing the floor suction airflow path, and a switching member connected to a movable part of each damper and switching the two dampers to be alternately in an open state and a closed state. Each damper is configured such that in the closed state, the closed side of the movable part is at a position having lower air pressure relative to the back side.

Description

Dust collector and dust collection system TECHNICAL FIELD

[0001] The present application belongs to the field of dust collectors, and particularly relates to a dust collector and a dust collection system. BACKGROUND

[0002] With the continuous expansion and update of dust collection technology, base station type dust collectors with full functions and easy storage are increasingly popular. The base station not only can store and dock the dust collector, but also can charge the dust collector and clean the dirt collected in the dust collector, bringing great convenience to users.

[0003] However, in order to realize the dirt cleaning function, a vacuum motor is usually installed near the cleaning chamber in the base station, and the dirt in the dust collector is quickly sucked into the dust bag of the cleaning chamber through the suction airflow generated by the vacuum motor. However, the vacuum motor is heavy and expensive, which is not convenient for users to move and increases the cost.

[0004] Therefore, the motorless base station without a vacuum motor has become a research hotspot. For example, Chinese patent document CN117502962A discloses a dust collection station for a vacuum motor-free dust collector. The dust collection station does not have a vacuum motor, but works based on the vacuum motor of the dust collector body. The dust collection station is provided with an air duct switching slider and a return spring below the vacuum motor of the dust collector body. When the dust collector body is placed on the dust collection station for dust collection, the return spring does not deform, and the air duct switching slider can block the second air duct to switch to the base station for dust collection. When performing normal dust collection, the return spring is deformed to drive the air duct switching slider to block the first air duct to switch to the dust collector body for dust collection. However, during normal dust collection, the vacuum degree inside the air duct switching slider is much higher than that outside, and the air duct switching slider (hereinafter referred to as slider) is continuously subjected to the pulling force of unblocking, which is more prone to air leakage, affecting the dust collection performance. Moreover, the scheme uses a spring to apply a pushing force and a pulling force to the slider to switch the air duct, which has poor stability. The spring is prone to failure after long-term use, resulting in failure to push and pull in place, thereby causing air leakage at the blocking position, or failure to effectively open the air duct, or even causing the air duct to fail to switch normally, affecting the dust collection and dust collection effect.

[0005] The Chinese patent document CN219982787U discloses a single-vacuum-source base station type dust collector with switchable air ducts. When self-cleaning, the first plug on the same side is lifted by the trigger rod with a spring, the base station air inlet below is opened, and the second plug on the other side is pressed to block the dust suction air inlet below, and self-cleaning is performed by using the suction force of the vacuum source. Conversely, dust suction can be performed. Similarly, in this scheme, when the vacuum source is working, the vacuum degree on the blocking side is larger, thereby increasing the risk of air leakage. At the same time, in this scheme, whether in the self-cleaning or dust suction state, the corresponding plug cannot be completely opened and is still half blocked in the air path, thereby hindering the airflow from flowing quickly to the motor and increasing the air resistance. Moreover, this scheme also uses a spring to apply force to realize air duct switching, which is prone to failure.

[0006] In summary, the existing air duct switching structures all have problems such as unstable structure, air leakage, and failure, and cannot meet the long-term and stable use requirements of users. SUMMARY

[0007] The present application is made to solve the above problems, and aims to provide a dust collector and a dust suction system that can realize long-term, stable, and reliable air path switching through a simple structure. To achieve the above purpose, the present application adopts the following scheme:

[0008] <SYSTEM>

[0009] The present application provides a dust suction system, which comprises: a dust collector comprising an electric fan and a dust cup, wherein a negative pressure generated by the electric fan forms a ground suction air path, air flow along the air path sucks dirt from a surface to be cleaned into the dust cup, and surface cleaning is realized; a base station matched with the dust collector, and after being connected with the dust collector, the base station forms a warehouse cleaning air path together with the dust collector based on the negative pressure generated by the electric fan, air flow along the air path sucks dirt from the dust cup, and dust cup cleaning is realized; an air path switching part that switches the ventilation state of the ground suction air path and the warehouse cleaning air path, comprising a warehouse cleaning air door arranged on the warehouse cleaning air path and opening and closing the air path, a ground suction air door arranged on the ground suction air path and opening and closing the air path, and a switching piece connected with the movable part of each air door and switching the two air doors to alternately be in the open and closed states; wherein the air door is arranged such that in the closed state, the closing surface side of the movable part is at a position / region with lower air pressure than the back surface side.

[0010] The beneficial effects of the above scheme are:

[0011] By the above structure, the dust suction damper and the bin cleaning damper are alternately switched between the open and closed states by the switching member, so that the ground suction air path can be opened and the bin cleaning air path can be closed, or the bin cleaning air path can be opened and the ground suction air path can be closed, and the vacuum cleaner and the base station can realize the dust suction or the bin cleaning by sharing a vacuum source; and since the bin cleaning damper and the dust suction damper are both arranged to be in a position with a lower air pressure (a greater vacuum degree) on the closing surface side of the movable part than on the back surface side in the closed state. Therefore, in the closed state and after the electric fan is turned on, the closing surface side of the damper is always subjected to a greater suction force of the electric fan, so that the damper is closed more tightly. Without the switching member providing a large plugging force, the air tightness of the closing surface side can be stably and reliably ensured, and air leakage is avoided.

[0012] Specifically, in the dust suction system provided by the application, each damper can include a damper plate and a damper frame, and the corresponding damper is closed when the damper plate and the damper frame are in close contact. The area of mutual adhesion of the damper plate and the damper frame in the closed state is a closing surface, the closing surface is provided with an elastic sealing member, the side of the damper plate or the damper frame on which the closing surface is located is a closing surface side, and the opposite side of the closing surface is a back surface side. Any one of the damper plate and the damper frame serves as a movable part, which can stably move away from and close to the air path, so as to realize the opening and closing of the air path. The suction force generated by the electric fan in the negative pressure state can be transmitted along the air path to realize the ground suction or the bin cleaning.

[0013] Preferably, in the dust suction system provided by the application, the air path switching part includes: a ventilation chamber, two damper frames, two damper plates, and a guide rod. The ventilation chamber is arranged between the air inlet of the electric fan and the air outlet of the dust cup. The two damper frames are arranged in a horizontal direction and separate the ventilation chamber into three chambers. The middle chamber has an upper opening that is open to the air inlet of the electric fan. The two side chambers correspond to the ground suction air path and the bin cleaning air path, respectively. The bottom of each side chamber is provided with a lower opening that is in communication with the corresponding air path. The two damper frames form ventilation openings of the two side chambers, which are in communication with the upper opening. The two damper plates are movably arranged in the two side chambers and are arranged such that when the damper plate in one side chamber is in an air path closing position in close contact with the damper frame, the damper plate in the other side chamber is in an air path opening position away from the damper frame. The guide rod serves as a switching member and is arranged to drive the two damper plates to move back and forth relative to the two damper frames, so as to alternately open and close the air paths corresponding to the two side chambers.

[0014] The above scheme has the following beneficial effects:

[0015] The application sets three chambers along 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 chambers from the middle chamber and serve as two air vents of the two side chambers and the middle chamber, two damper plates only move back and forth in the respective side chambers relative to the respective door frames, thereby alternately closing one air vent and opening the other air vent, the guide rod can accurately and stably push and pull the damper plate, push or pull the damper plate in one side chamber to be close to the door frame while the damper plate in the other side chamber is away from the door frame, and the closing surface where the damper plate is close to the door frame is provided with an elastic sealing element; once the electric fan is turned on, among the three chambers, the middle chamber has the largest gas flow rate and the lowest gas pressure, the chamber with the closed air vent has the smallest gas flow rate and the largest gas pressure, and the air pressure at the air vent = the gas pressure of the middle chamber > the gas pressure of the side chamber with the closed air vent, based on the pressure difference, the damper plate close to the door frame is pressed more tightly to the door frame by the gas pressure of the side chamber, thereby being closed more tightly, and as the electric fan continues to run, the elastic sealing element at the closing surface is compressed to gradually adjust the deformation to better fit the blocking gap, further improving the sealing effect and making the suction tighter. Moreover, the force direction in which the guide rod exerts force to press the damper plate to the door frame is consistent with the direction in which the pressure difference presses, the guide rod structure and position stability are not affected during the pressure difference pressing process, and the guide rod will not deviate from the moving path. When the electric fan is turned off, the pressure difference disappears, and the closing surface returns to the initial state, the damper plate is easily moved away from the door frame, ensuring the stability and reliability of the air path conversion.

[0016] Further, when fine dust and the like carried by the airflow meet humid air and are accumulated by moisture adhesion in the ventilation chamber, as the air vent is closed, the closing surface is provided with an elastic sealing element, so even if the fine dust is adhered to the closing surface, the elastic sealing element can deform to fit and block the gap, especially after the electric fan is turned on, the fitting and blocking effect will be better and better, and reliable sealing can still be ensured; at the same time after the air path is converted, the closing surface becomes the windward surface and is washed away by the airflow passing through.

[0017] Preferably, in the dust collection system provided by the application, the top of the middle chamber is at least 2 / 3 open, and among the three chambers, the middle chamber has the largest volume and top area. Such a setting can make the communication surface between the middle chamber and the air inlet of the electric fan larger, the suction better transmitted to the ventilation chamber, the air path less hindered, and the electric fan better perform its function.

[0018] Preferably, in the dust collection system provided by the present application, the upper opening of the middle chamber + the lower openings of the two side chambers ≥ 3 / 4 of the longitudinal cross-sectional area of the ventilation chamber; the ventilation chamber spans the top of the dust cup. Through such a setting, the sum of the areas of the upper opening and the lower openings in the ventilation chamber is basically equivalent to the entire longitudinal cross-sectional area of the ventilation chamber, so that the effective ventilation area of the ventilation chamber is maximized, further reducing the wind path resistance, improving the ventilation effect, and improving the efficiency of floor cleaning and bin cleaning. The ventilation chamber spanning the top of the dust cup ensures that the airflow from the top of the dust cup receives as little wind resistance as possible, allowing it to enter the ventilation chamber efficiently and smoothly.

[0019] Preferably, in the dust collection system provided by the present application, the area of the lower opening ≥ 4 / 5 of the cross-sectional area of the side chamber, so that the lower opening is as open as possible to the exhaust port of the dust cup, thereby further reducing the wind resistance.

[0020] Preferably, in the dust collection system provided by the present application, the closing surfaces of the two dampers are oppositely arranged and both face the middle chamber; the closing surface of the damper plate or the closing surface of the door frame is provided with a ring of elastic sealing pads. The roughly symmetrical arrangement of the two dampers can make the structure and movement process more stable, and the elastic sealing pad as an elastic sealing member is simple and reliable in structure.

[0021] Preferably, in the dust collection system provided by the present application, in the closed state, the area of the closing surface of the damper plate is provided with an elastic sealing pad, and the elastic sealing pad covers and exceeds the sealing surface area; the elastic sealing pad is embedded on the damper plate body and protrudes towards the door frame. Such a setting can reduce the difficulty of aligning the damper plate with the door frame, and make the elastic sealing pad more durable and reliable.

[0022] Preferably, in the dust collection system provided by the present application, along the axial direction of the guide rod, two bearing support members are arranged at intervals, one bearing support member is located outside the ventilation chamber and the other is located inside the ventilation chamber, the bearing support member includes a bracket and a bearing, the bracket supports the bearing, and the bearing has a middle part through which the guide rod is movably arranged and supports the guide rod; the cross-sectional area of the bracket of the bearing support member located inside the ventilation chamber is less than 1 / 4 of the cross-sectional area of the chamber. Such a double-bearing support member arrangement can make the movement 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 dust collector is accidentally dropped, the structure of the wind path conversion part is stable and does not deviate relatively. In addition, the cross-sectional area of the bearing support member is small enough not to affect the ventilation effect of the ventilation chamber. Furthermore, the bracket of the bearing support member can also be partially hollowed out to further reduce its cross-sectional area.

[0023] Preferably, in the dust collection system provided by the present application, the upper and lower shells surrounding the ventilation chamber are respectively matched with the shape and structure of the air inlet side of the electric fan and the air outlet side of the dust cup; after the dust collector is connected with the base station, a normal projection is made from top to bottom, the middle chamber and one side chamber are overlapped with the air inlet of the electric fan and the air outlet of the dust cup, and the lower opening of the other side chamber is not overlapped with the air outlet area as the cleaning bin lower opening; the base station is provided with a cleaning bin connecting pipe matched with the dust collector, and the cleaning bin lower opening corresponds to the cleaning bin connecting pipe. Moreover, the ventilation chamber is overlapped with the air inlet of the electric fan and the air outlet of the dust cup, so that the ventilation chamber and the air inlet of the electric fan and the air outlet of the dust cup can be arranged more closely, the air path is the shortest, and the airflow enters the electric fan from bottom to top quickly. The cleaning bin lower opening is arranged in a manner that the cleaning bin airflow can be sent into the ventilation chamber more smoothly.

[0024] Preferably, in the dust collection system provided by the present application, the air door plate and the door frame are arranged such that, in the open state, the side surface facing the air path is substantially parallel to the main flow direction of the corresponding opened air path (the direction of the dominant path or the shortest path in the air path flow direction). Such an arrangement can make the air path as small as possible in the open state, and the high-speed airflow can pass through smoothly.

[0025] Preferably, in the dust collection system provided by the present application, the moving path of the guide rod and the air door plate is substantially parallel to the ground, which is more stable.

[0026] Preferably, the dust collection system provided by the application comprises: a dust collector comprising an electric fan and a dust cup, a suction air path being formed by suction force generated by the electric fan, air flow along the air path sucking dirt from a surface to be cleaned into the dust cup, and then the air flow entering the electric fan to achieve surface cleaning; a base station matched with the dust collector, and after being connected with the dust collector, forming a warehouse cleaning air path based on the suction force generated by the electric fan, air flow along the air path sucking dirt from the dust cup, and then the air flow entering the electric fan to achieve dust cup cleaning; an air path conversion part comprising a ventilation chamber, two door frames, two air door plates, a guide rod and a driving motor; the ventilation chamber is arranged between the air inlet of the electric fan and the air outlet of the dust cup, the two door frames are arranged in a horizontal direction and separate the ventilation chamber into three chambers; the middle chamber has an upper opening open to 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 each side chamber is provided with a lower opening at the bottom and communicates with the corresponding air path; the two door frames form ventilation openings of the two side chambers, which communicate with the upper opening; the two air door plates are movably arranged in the two side chambers and are arranged such that when the air door plate in one side chamber is in an air path closed position closely attached to the door frame, the air door plate in the other side chamber is in an air path open position away from the door frame; the guide rod is arranged to drive the two air door plates to move back and forth relative to the two door frames under the driving of the driving motor, so that the corresponding air paths of the two side chambers are alternately opened and closed; wherein the area where the air door plate and the door frame are attached to each other when the air door plate is in the air path closed position is defined as a closed surface, and the closed surface is provided with an elastic sealing element.

[0027] The beneficial effects of the above scheme are:

[0028] The application sets three chambers along 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 chambers from the middle chamber and serve as two air vents of the two side chambers and the middle chamber, two damper plates only move back and forth in the respective side chambers relative to the respective door frames, thereby alternately closing one air vent and opening the other air vent, the driving motor provides driving force to enable the guide rod to accurately and stably push and pull the damper plate, the damper plate in one side chamber is pushed or pulled to be close to the door frame while the damper plate in the other side chamber is away from the door frame, and the closing surface of the damper plate close to the door frame is provided with an elastic sealing element; therefore, when the air path is converted, the driving motor can provide stable driving force to firmly press one damper plate against the door frame and move the other damper plate away from the door frame, so that the two damper plates can be accurately moved to the target position (floor cleaning position or warehouse cleaning position) each time without deviation. And once the electric fan is turned on, among the three chambers, the gas flow rate in the middle chamber is the largest and the gas pressure is the lowest, the gas flow rate in the chamber with the closed air vent is the smallest and the gas pressure is the largest, the air pressure at the air vent = the gas pressure in the middle chamber > the gas pressure in the side chamber with the closed air vent, based on the pressure difference, the damper plate close to the door frame will be pressed more tightly to the door frame by the side chamber pressure, thereby being closed more tightly, and as the electric fan continues to run, the compression of the elastic sealing element at the closing surface gradually adjusts the deformation to better fit the blocking gap, further improving the sealing effect and making the suction tighter. Moreover, the pressing direction of the damper plate to the door frame by the driving motor and the guide rod is consistent with the direction of the pressure difference, and the pressure difference does not affect the structure and position stability of the driving motor and the guide rod, and does not make the guide rod deviate from the moving path. When the electric fan is turned off, the pressure difference disappears, and the closing surface returns to the initial state, and the damper plate is easily moved away from the door frame by the driving motor. Further, when fine dust and the like carried by the airflow meet humid air and are accumulated by moisture adhesion in the air chamber, the displacement distance of the damper plate opening and closing will not be affected due to the stable and accurate displacement of the driving motor, and due to the elastic sealing element provided on the closing surface when the air vent is closed, even if the fine dust is adhered to the closing surface, the elastic sealing element can deform to fit the blocking gap, especially after the electric fan is turned on, the fitting and blocking effect will be better and better, and reliable sealing can still be ensured; at the same time, after the air path is converted, the closing surface becomes the windward surface and is washed away by the airflow. In addition, in special circumstances, for example, the user forgets to install the filter (such as a cyclone filter or HEPA) in the dust cup, causing large particles of dust to enter the air chamber, for the same reason, the air path conversion part of the application can still ensure that the opening and closing are flexible and the sealing of the closing surface in the use state (floor cleaning state or warehouse cleaning state).In addition, when the user needs to quickly or frequently switch the air path, for example, for trial, the electric fan is started in the middle of the air path switching, at this time, the two groups of air doors and the door frame are in a separated state, but this situation does not affect the stability and effectiveness of the air path switching of the present application. The driving motor and the guide rod can provide sufficient driving force and accurate displacement for the air door plate, and the air door plate that needs to be close to the door frame is easily close to and tightly attached to the door frame under the action of the air pressure difference, thereby smoothly and stably moving to the position and completing the air path switching. In summary, the present application has a simple structure, the two air door plates are opened and closed freely and in place, and the stability and reliability of the air path switching are ensured. Even if special situations are encountered, the performance will not be affected, it is durable, and can meet the long-term and stable use requirements of the user.

[0029] Preferably, in the dust collection system provided by the present application, the guide rod coaxially connects the two air door plates, and a sealing ring is arranged at the connection; the driving motor converts the rotary motion into a push-pull force parallel to the axial direction of the guide rod and outputs the push-pull force to the guide rod through the eccentric wheel mechanism. In this way, the structure is more stable, the eccentric wheel structure is simple and reliable, and the rotary driving force of the driving motor can be stably converted into continuous push and pull forces, and the accuracy of displacement during the pushing and pulling processes is ensured.

[0030] Preferably, in the dust collection system provided by the present application, the state in which the warehouse cleaning air path is opened and the floor suction air path is closed is recorded as a warehouse cleaning state, and the state in which the floor suction air path is opened and the warehouse cleaning air path is closed is recorded as a floor suction state; the air path switching part further comprises a posture sensing unit for sensing the posture relationship between the dust collector and the base station. When the dust collector and the base station are matched and connected in place, the posture sensing unit generates a first sensing signal, and when the dust collector and the base station are separated, the posture sensing unit generates a second sensing signal; the driving motor drives the guide rod to move in a first direction to enter the warehouse cleaning state based on the first sensing signal, or drives the guide rod to move in a second direction to enter the warehouse cleaning state based on the second sensing signal. Such a setting enables the system to automatically switch the air path according to the posture first, and then start the electric fan to perform floor suction or warehouse cleaning.

[0031] Preferably, in the dust collection system provided by the present application, a bearing support is arranged between the driving motor and the adjacent side chamber, and between the side chamber and the other side chamber, the bearing support comprising a bracket and a bearing, the bracket supporting the bearing, the bearing having a middle part through which the guide rod is movably arranged and supporting the guide rod; the sectional area of the bracket of the bearing support between the two side chambers is less than 1 / 4 of the sectional area of the chamber. The arrangement of the double bearing supports can make the moving path of the guide rod (relative to the ventilation chamber) more stable and accurate, and the air door plate can be more accurately and stably moved. In particular, even if the dust collector is accidentally dropped, the structure of the air path conversion part is stable and relative deviation does not occur. In addition, the sectional area of the bearing support is small enough, and the ventilation effect of the ventilation chamber is not affected. Furthermore, the bracket of the bearing support can be partially hollowed out, further reducing the sectional area.

[0032] Preferably, in the dust collection system provided by the present application, the upper and lower housings surrounding the ventilation chamber are respectively matched with the shape and structure of the air inlet side of the electric fan and the air outlet side of the dust cup; the driving motor is independently arranged and does not contact the ventilation chamber; after the dust collector is connected with the base station, a front projection is performed from top to bottom, the middle chamber and one side chamber overlap with the air inlet of the electric fan and the air outlet of the dust cup, the projection area of the driving motor does not overlap with the projection area of the electric fan and the dust cup, and the lower opening of the other side chamber as a cleaning bin lower opening does not overlap with the air outlet area; the base station is provided with a cleaning bin connecting pipe matched with the dust collector, and the cleaning bin lower opening corresponds to the cleaning bin connecting pipe. The driving motor is independently arranged and does not occupy the space of the ventilation chamber, and does not interfere with the ventilation effect of the ventilation chamber. Furthermore, the ventilation chamber and the air inlet of the electric fan and the air outlet of the dust cup overlap with each other, so that the ventilation chamber and the air inlet of the electric fan and the air outlet of the dust cup can be arranged more closely, the air path is the shortest, and the airflow enters the electric fan quickly from bottom to top. The setting position of the cleaning bin lower opening can make the cleaning bin airflow more smoothly enter the ventilation chamber.

[0033] <the dust collector>

[0034] Further, the present application also provides a dust collector which can independently form a ground suction air path and form a cleaning bin air path in cooperation with the base station, comprising an electric fan and a dust cup, and further comprising an air path conversion part having any of the technical features described in the <dust collection system> above. Based on the same improved technology, the dust collector has the same beneficial effects as the <dust collection system>.

[0035] In addition, the dust collector can further comprise a soft / hard extension pipe (conductive pipe) and a suction nozzle. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 is a structural schematic diagram of a dust collection system related to an embodiment of the present application;

[0037] Fig. 2 is a structural schematic diagram of a dust collector related to an embodiment of the present application;

[0038] Fig. 3 is a schematic view of the structure of the main body of the vacuum cleaner according to an embodiment of the present application;

[0039] Fig. 4 is a sectional view of the main body of the vacuum cleaner according to an embodiment of the present application;

[0040] Fig. 5 is a sectional view of the vacuum cleaner according to an embodiment of the present application;

[0041] Fig. 6 is a schematic view of the structure of the base station according to an embodiment of the present application;

[0042] Fig. 7 is a sectional view of the vacuum cleaning system according to an embodiment of the present application;

[0043] Fig. 8 is a schematic view of the path and flow direction of the cleaning bin air passage RC in the vacuum cleaning system according to an embodiment of the present application;

[0044] Fig. 9 is a schematic view of the structure of the air passage switching mechanism according to an embodiment of the present application;

[0045] Fig. 10 is a schematic view of the internal structure of the air passage switching mechanism according to an embodiment of the present application;

[0046] Fig. 11 is a sectional view of the internal structure of the air passage switching mechanism according to an embodiment of the present application;

[0047] Fig. 12 is a schematic view of the internal structure of the air passage switching mechanism according to an embodiment of the present application, viewed from the upside down;

[0048] Fig. 13 is an enlarged view of a part of Fig. 4 corresponding to the vacuuming state (RF on + RC closed);

[0049] Fig. 14 is a schematic view of Fig. 13, in which the path and flow direction of the floor air passage RF are indicated;

[0050] Fig. 15 is a schematic view of Fig. 13, in which the vacuuming state is switched to the cleaning bin state (RC on + RF closed);

[0051] Fig. 16 is a schematic view of Fig. 15, viewed from the upside down;

[0052] Fig. 17 is a schematic view of Fig. 15, in which the path and flow direction of the cleaning bin air passage RC are indicated;

[0053] Fig. 18 is a schematic view of a part of the structure of the vacuum cleaner according to a modification of the present application, corresponding to the area of the damper plate;

[0054] Fig. 19 is an enlarged sectional view of the damper plate according to a modification of the present application, in which (a) and (b) respectively show two different modification schemes; DETAILED DESCRIPTION

[0055] The vacuum cleaner and vacuum cleaning system according to the present application will be described in detail below with reference to the accompanying drawings.

[0056] <Embodiment>

[0057] As shown in FIGS. 1-4, the dust collection system 1000 comprises a dust collector 10, a base station 20 and an air path conversion part 30.

[0058] As shown in FIGS. 2 and 5, the dust collector 10 is a wireless dust collector, which comprises a dust collector main body 11, an extension pipe 12 and a suction nozzle 13. The dust collector main body 11 is used to form a floor air path RF to suck up dirt on a surface to be cleaned. The rear end of the extension pipe 12 is connected to the dust collector main body 11, which can extend the floor air path RF outside the dust collector main body 11. The suction nozzle 13 is installed at the front end of the extension pipe 12, which is directed to and contacts the surface to be cleaned, and further guides the floor air path to suck up dirt such as dust and hair on the surface to be cleaned.

[0059] As shown in FIGS. 3-4, the dust collector main body 11 comprises an outer 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.

[0060] The outer shell 111 is used to install the dust cup 113, the main body air inlet pipe 114, the main body connecting pipe 115 and the energy pack 116.

[0061] The electric fan 112 is used to generate negative pressure to provide suction, thereby forming a floor air path RF as shown in FIG. 5 or a bin cleaning air path RC as shown in FIG. 8. In this embodiment, the air inlet of the electric fan 112 is directed downward, and the air outlet is connected to the side opening 111a of the outer shell 111.

[0062] The dust cup 113 is connected to the electric fan 112 and is used to contain dirt after dust-air separation. In this embodiment, the dust cup 113 comprises a cup body 113a, a bottom cover 113b, a bottom cover switch 113c and a main body filter unit 113d. The cup body 113a is used to contain filtered dirt. The bottom cover 113b is hingedly connected to one side of the bottom of the cup body 113a and is sealingly connected to the other side through the bottom cover switch 113c. The main body filter unit 113d is used to further filter small-particle-size dirt and discharge clean air flow from the air outlet 113e of the dust cup; in this embodiment, the main body filter unit 113d is a multi-cone cyclone filter, and the corresponding air outlet 113e is a plurality of outlets at the top of the cyclone filter.

[0063] The rear end of the main body air inlet pipe 114 is connected to the dust cup 113.

[0064] The main body connecting pipe 115 is used to match and communicate with the base station 20 after the dust collector main body 11 is placed on the base station 20, corresponding to the bin cleaning air path RC; when the dust collector main body 11 works independently, the main body connecting pipe 115 is closed together with the bin cleaning air path RC.

[0065] The energy package 116 is used to power the vacuum cleaner 10, in this embodiment, the energy package 116 is a battery package, which can power the electric fan 112, the extension pipe 12 and the suction nozzle 13. In order to avoid the energy package 116 running out of power and failing to clean the warehouse after being returned to the base station, the lower limit of the voltage in the protection circuit of the energy package 116 (cut-off voltage) can be set to be greater than or equal to the voltage required to complete one automatic warehouse cleaning.

[0066] In the floor cleaning state, the vacuum cleaner 10 works independently, and the floor cleaning air flow path RF is formed in the vacuum cleaner main body 11 from the main body air inlet pipe 114 → the cup body 113a → the main body filter unit 113d → the air inlet of the electric fan 112.

[0067] As shown in FIG. 5, after connecting the extension pipe 12 and the suction nozzle 13, the floor cleaning air flow path RF is extended to: the extension pipe 12 → the suction nozzle 13 → the main body air inlet pipe 114 → the cup body 113a → the main body filter unit 113d → the air inlet of the electric fan 112.

[0068] As shown in FIGS. 1 and 6, the base station 20 is matched with the vacuum cleaner 10 to allow the vacuum cleaner 10 to be parked, stored, and charged, and can form a warehouse cleaning air flow path RC based on the electric fan 112 to clean the dirt contained in the vacuum cleaner main body. The base station 20 includes a base station body 21, a warehouse cleaning connection pipe 22, a charger 23, a backup energy package 24, and a base 25.

[0069] As shown in FIG. 7, the base station body 21 is a hollow structure, and an upper portion is provided with a placement cavity 211. A dust bag 212 is installed below the outlet of the placement cavity 211. A base station filter unit 213 for further cleaning the air flow is arranged below the dust bag 212. The inlet end of a base station air exhaust passage 214 is arranged below the base station filter unit 213. The base station air exhaust passage 214 extends upward along the outer wall of the base station filter unit 213 and the placement cavity 211 from the inlet end. The placement cavity 211 is matched with the vacuum cleaner main body 11 and can at least seal and contain the lower half of the dust cup 113. A protruding push block 211a is arranged on the inner side of the placement cavity 211. When the dust cup 113 enters the placement cavity 211, the push block 211a corresponds to the bottom cover switch 113c to open the bottom cover 113b. The bottom of the placement cavity 211 is a sealed connection cavity 211b, and the space size should be greater than that of the bottom cover 113b, so that the bottom cover 113b can be completely opened as much as possible in parallel to the main air flow direction. The dust bag 212 is used to collect the dirt in the dust cup during warehouse cleaning, and the inlet is in sealed communication with the outlet of the placement cavity 211. After the bottom cover 113b is opened, the dust bag 212 can be connected in communication.

[0070] The cleanout connecting pipe 22 extends upwardly from the outlet end of the base station exhaust passage 214 and extends out of the base station body 21 by a distance to match the main body connecting pipe 115 for insertion of the main body connecting pipe 115 to form a sealed communicating pipe. In the present embodiment, the cleanout connecting pipe 22 is in engagement with the main body connecting pipe 115 and a sealing gasket is provided at the interface.

[0071] The electric output end 231 of the charger 23 is a spring needle. When the main body 11 of the vacuum cleaner is placed in the base station 20, the contact sheet of the energy pack 116 on the main body 11 of the vacuum cleaner is in contact with the electric output end 231 to connect and the charger 23 charges the energy pack 116 of the main body 11 of the vacuum cleaner.

[0072] The backup energy pack 24 is detachably placed in the pack box 216 on the side of the bottom of the base station body 21. When the original energy pack 116 of the vacuum cleaner 10 is not able to provide enough power to work, the user can choose to replace the original energy pack 116 with the backup energy pack 24 to make the vacuum cleaner 10 or the electric fan 112 work immediately.

[0073] 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 enclose a space to match the suction nozzle 13 to enable the suction nozzle 13 to be placed stably.

[0074] As shown in FIG. 8, in the cleanout state, the base station 20 cooperates with the main body 11 of the vacuum cleaner to form a cleanout air passage 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 passage 214→main body connecting pipe 115→electric fan 112 air inlet.

[0075] As shown in FIGS. 4-5 and 8-12, the air passage conversion part 30 is used to convert the ventilation state of the floor cleaning air passage RF and the cleanout air passage RC. The air passage conversion part 30 includes a ventilation chamber 31, a floor cleaning door frame 32, a cleanout door frame 33, a floor cleaning air door plate 34, a cleanout air door plate 35, a guide rod 36, a driving motor 37, an eccentric wheel mechanism 38 and a posture sensing unit.

[0076] 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 of the ventilation chamber 31 are matched with the shape and structure of the air inlet side of the electric fan 112 and the air outlet side of the dust cup 113, respectively. The inside of the ventilation chamber 31 is divided into one middle chamber and two side chambers by the suction door frame 32 and the cleaning door frame 33. As shown in FIG. 13, the three chambers are arranged in order from left to right as follows: the suction side chamber 311, the middle chamber 312, and the cleaning side chamber 313. The middle chamber 312 has an upper opening 312a that is open to the air inlet of the electric fan 112. The suction side chamber 311 and the cleaning side chamber 313 correspond to the suction air path and the cleaning air path, respectively. The bottom of the suction side chamber 311 and the cleaning side chamber 313 is respectively provided with a suction lower opening 311a and a cleaning lower opening 313a that are in communication with the suction air path RF and the cleaning air path RC. The suction lower opening 311a is open to the air outlet 113e, and the cleaning lower opening 313a is open to the base station air outlet 214. In this embodiment, in order to better ventilate and more effectively transmit the suction force of the electric fan 112 to the upstream of the suction and cleaning air paths, the ventilation chamber 31 spans the top of the dust cup 113, and the top of the middle chamber 312 is open by 2 / 3. Among the three chambers, the middle chamber 312 has the largest volume and top area. In addition, 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 cleaning side chamber 313 that is far from the cleaning door frame 33 can also be open, so that the ventilation area of the cleaning air path is larger.

[0077] The suction door frame 32 and the cleaning door frame 33 form the ventilation openings of the suction side chamber 311 and the cleaning side chamber 313, respectively, and both are in communication with the upper opening 312a.

[0078] The suction ground damper plate 34 and the cleaning bin damper plate 35 are movably arranged in the suction ground side chamber 311 and the cleaning bin side chamber 313 respectively, and the relative position relationship of the two damper plates is arranged such that when the damper plate in any one side chamber is in the air path closing position abutting against 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 suction ground damper plate 34 abuts against the suction ground door frame 32 and is in the air path closing position, and the cleaning bin damper plate 35 is away from the cleaning bin door frame 33 and is in the air path opening position, at this time the cleaning bin air path RC is opened, and the cleaner 10 enters the cleaning bin state; on the contrary, when the cleaning bin damper plate 35 is in the air path closing position, and the suction ground damper plate 34 is in the air path opening position, at this time the suction ground air path RF is opened, and the cleaner 10 enters the suction ground state. The area where the damper plate abuts against the door frame when the damper plate is in the air path closing position is referred to as the closing face, and the closing face is provided with an elastic sealing member. In the embodiment, the closing faces of the two damper plates are oppositely arranged and both face the middle chamber 312; the closing face of the damper plate or the closing face of the door frame is provided with a ring of elastic sealing gasket 344 or 354, and the elastic sealing gasket 344 or 354 covers and exceeds the closing face area (the abutting area of the damper plate and the door frame), so that the door frame can be better covered and abutted; in the embodiment, the elastic sealing gaskets 344 and 354 are fixed on the closing faces of the corresponding damper plates and protrude towards the door frame direction, and the inner ring positions corresponding to the elastic sealing gaskets 344 and 354 on the two damper plates are also respectively provided with a ring of slightly protruding limiting ribs 345 and 355. In addition, the edge of the door frame closing face is provided with a ring of top ribs, which can further enhance the sealing effect.

[0079] Further, in order to make the air path conversion process more stable and reliable, a limiting member can also be arranged in the door frame. As shown in FIG. 16, the suction ground door opening limiting structure 311b and the cleaning bin door opening limiting structure 313b are arranged on the left side of the suction ground lower opening 311a and the right side of the cleaning bin lower opening 313a respectively, and the back side of the corresponding damper plate contacts the corresponding door opening limiting structure when the damper plate is in the open state (fully open). The suction ground door opening limiting structure 311b is arranged near the left side of the suction ground lower opening 311a and is a baffle plate parallel to the back side 342, limiting the moving range of the suction ground damper plate 34; the cleaning bin door opening limiting structure 313b is arranged near the right side of the cleaning bin lower opening 313a and is a baffle frame corresponding to the back side 352, limiting the moving range of the cleaning bin damper plate 35.

[0080] The guide rod 36 is arranged to drive the two air door plates to move back and forth relative to the two door frames under the drive of the driving motor 37, so that the corresponding air passages of the two side chambers are alternately opened and closed, thereby switching the air passages. The guide rod 36 is coaxially connected with the ground suction air door plate 34 and the dust bin cleaning air door plate 35 in sequence along the axial direction, the ground suction air door plate 34 is arranged in the middle of the guide rod 36, and the dust bin cleaning air door plate 35 is arranged at the right end of the guide rod 36. The guide rod 36 is in sealing connection with the two air door plates, and a sealing ring is arranged at the connection position. In the embodiment, the guide rod 36 is circular in cross section, and each air door 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 segment 343 / 353 which is in close contact with the side surface of the guide rod 36, so that the sealing area is larger, and the guide rod 36 is in sealing connection with each air door plate through the three sealing rings 361 arranged at the two end surfaces and the middle of the sealing pipe segment 343 / 353. In the embodiment, when the dust bin is in the cleaning state (the dust collector 10 is placed on the base station 20 in a fixed position), the guide rod 36 is substantially parallel to the ground or a horizontal plane, and the moving paths RM of the guide rod 36, the ground suction air door plate 34 and the dust bin cleaning air door plate 35 are all parallel to the ground or the horizontal plane.

[0081] In order to further improve the stability and reliability of the movement of the guide rod 36, the application is provided with a bearing support between the driving motor 37 and the ground suction side chamber 311 and between the ground suction side chamber 311 and the dust bin cleaning side chamber 313, the bearing support comprises 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 move through and support the guide rod 36. The cross-sectional area of the bracket 362 of the bearing support between the ground suction side chamber 311 and the dust bin cleaning side chamber 313 is less than 1 / 4 of the cross-sectional area of the chamber, both the cross-sectional area and the longitudinal cross-sectional area should meet the above condition. In the embodiment, as shown in FIG. 16, the rod bracket 362 and the bearing 363 only occupy a very small space between the ground suction side chamber 311 and the dust bin cleaning side chamber 313, the maximum width of the bracket 362 corresponds to the short axis width of the black ellipse in the figure, the width of the bracket 362 is slightly larger than the bearing 363, and the two side regions of the bracket 362 in the width direction are open to form a large air duct for smooth airflow.

[0082] The driving motor 37 is independently arranged and does not directly contact the ventilation chamber 31, and is an independent structure. In the embodiment, as shown in FIG. 13, the driving motor 37 is located on the right side of the ventilation chamber 31, and the two are separated by a relatively thick frame structure. The driving motor 37 converts the rotary motion into a push-pull force which is parallel to the axial direction of the guide rod 36 and outputs to the guide rod 36 through the eccentric wheel mechanism 38. The output shaft of the driving motor 37 is inserted into the center hole 381a of the eccentric wheel mechanism 38. The driving motor 37 used in the embodiment is a micro rotary motor with a power of about 10W.

[0083] The driving motor 37 can be provided with a manual switch to allow the user to manually operate to start the driving motor 37 to rotate 180° to enter the cleaning bin position (the eccentric shaft 381b rotates from the leftmost side to the rightmost side in FIG. 11), and then to rotate 180° to return to the floor cleaning position (the eccentric shaft 351b rotates from the rightmost side to the leftmost side) after the cleaning bin is finished. A Hall sensor switch structure can also be used to achieve automatic start switch. A Hall sensor and a magnet are respectively provided on the base station 20 and the dust collector main body 11. When the dust collector main body 11 is placed on the base station, the magnet is close to and activates the Hall sensor to generate a start signal, thereby automatically starting the driving motor 37 to rotate to the cleaning bin position and stop. A timing switch circuit is used to keep the driving motor 37 in the cleaning bin position for a period of time (the time required for cleaning the bin), and then generate a start signal to make the driving motor 37 rotate back to the floor cleaning position. Alternatively, when the dust collector main body 11 leaves the base station 20, the magnetic field disappears, the Hall sensor changes from the activated state to the inactivated state, and the driving motor 37 uses this change signal as a start signal to rotate back to the floor cleaning position to reset.

[0084] As shown in FIGS. 10-12, the eccentric wheel mechanism 38 is used to convert the input rotary driving force into horizontal reciprocating pushing and pulling driving force, and the output end is connected with the guide rod 36. The eccentric wheel mechanism 38 includes an eccentric wheel 381 and a connecting piece 382. The eccentric wheel 381 is disc-shaped, and has a central hole 381a and an eccentric shaft 381b on both sides. The central hole 381a is located at the center of the disc and is used to install the output shaft of the driving motor 37. The eccentric shaft 381b is connected with the guide rod 36 through the connecting piece 382. The connecting piece 382 includes a shaft connecting part 382a and a rod connecting part 382b. The shaft connecting part 382a is provided with a limiting sliding groove 382a-1 matching the eccentric shaft 381b. The width of the limiting sliding groove 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 limiting sliding groove 382a-1 along a direction perpendicular to the moving direction of the guide rod 36, and output the pushing and pulling force of the connecting piece 382 along the axial direction of the guide rod 36. The rod connecting part 382b is arranged between the shaft connecting part 382a and the input end (left end in the figure) of the guide rod 36, and is connected with them respectively. The eccentric wheel structure is simple and reliable, and can stably convert the rotary driving force of the driving motor into continuous pushing and pulling force, and ensure the accuracy of the displacement during pushing and pulling.

[0085] The attitude sensing unit can sense the attitude relationship between the dust collector 10 and the base station 20. When the dust collector 10 and the base station 20 are matched and connected in place, the attitude sensing unit generates a first sensing signal. When the dust collector 10 and the base station 20 are separated, the attitude sensing unit generates a second sensing signal. The driving motor 37 automatically drives the guide rod 36 to move in a first direction (right in FIG. 13) to enter the cleaning state based on the first sensing signal, or automatically drives the guide rod 36 to move in a second direction (left in FIG. 15) to enter the cleaning state based on the second sensing signal. The attitude sensing unit can be a magnet and a corresponding Hall sensor respectively arranged on the dust collector body 11 and the base station body 21. When the dust collector body 11 is placed on the base station body 21, the magnet approaches and activates the Hall sensor to generate a cleaning start signal, thereby automatically starting the driving motor 37 to rotate 180° from the ground cleaning state and stop (in FIG. 12, the eccentric shaft 381b rotates from the leftmost side to the rightmost side), and enter the cleaning state. The way to return to the ground cleaning state from the cleaning state is that when the dust collector body 11 leaves the base station body 21, the magnetic field disappears, the Hall sensor enters the inactivated state from the activated state, and the change signal is taken as the second sensing signal generated by the attitude sensing unit. Based on this signal, the driving motor 37 rotates 180° again and stops (in FIG. 12, the eccentric shaft 381b rotates from the rightmost side to the leftmost side), and returns to the ground cleaning state to achieve accurate reset.

[0086] The attitude sensing unit can sense the attitude relationship between the dust collector 10 and the base station 20. When the dust collector 10 and the base station 20 are matched and connected in place, the attitude sensing unit generates a first sensing signal. When the dust collector 10 and the base station 20 are separated, the attitude sensing unit generates a second sensing signal. The driving motor 37 automatically drives the guide rod 36 to move in a first direction (right in FIG. 13) to enter the cleaning state based on the first sensing signal, or automatically drives the guide rod 36 to move in a second direction (left in FIG. 15) to enter the cleaning state based on the second sensing signal. The attitude sensing unit can be a magnet and a corresponding Hall sensor respectively arranged on the dust collector body 11 and the base station body 21. When the dust collector body 11 is placed on the base station body 21, the magnet approaches and activates the Hall sensor to generate a cleaning start signal, thereby automatically starting the driving motor 37 to rotate 180° from the ground cleaning state and stop (in FIG. 12, the eccentric shaft 381b rotates from the leftmost side to the rightmost side), and enter the cleaning state. The way to return to the ground cleaning state from the cleaning state is that when the dust collector body 11 leaves the base station body 21, the magnetic field disappears, the Hall sensor enters the inactivated state from the activated state, and the change signal is taken as the second sensing signal generated by the attitude sensing unit. Based on this signal, the driving motor 37 rotates 180° again and stops (in FIG. 12, the eccentric shaft 381b rotates from the rightmost side to the leftmost side), and returns to the ground cleaning state to achieve accurate reset.

[0087] Based on the above structure, the specific working process of the dust collection system 1000 provided in the embodiment is as follows:

[0088] As shown in FIGS. 2, 4, 5 and 13-14, when the user performs the floor cleaning work, the dust collector 10 is used independently (separated from the base station 20) and the suction nozzle 13 is directed to the surface to be cleaned. The dust collector 10 is in the floor cleaning state, the floor cleaning damper plate 34 is in the air passage opening position, the back side 342 thereof is in contact with the floor cleaning door limiting structure 311b, the floor cleaning side chamber 311 is ventilated, and the floor cleaning air passage RF is opened; at the same time, the cleaning bin damper plate 35 is in the air passage closing position, the closing face side 351 thereof is in contact with the cleaning bin damper frame 332 to close, the cleaning bin side chamber 313 is not ventilated, and the cleaning bin air passage RC is closed. After the user turns on the electric fan 112, the electric fan 112 continuously generates negative pressure, so that the external gas carrying the hair, dust and other dirt enters the suction nozzle 13, then enters the extension pipe 12, and then enters the main body air inlet pipe 114, and then enters the dust cup 113. The hair, dust and other dirt are separated and filtered, the filtered gas enters the floor cleaning side chamber 311 from the exhaust port 113e upward, then flows into the middle chamber 312 from the ventilation port of the floor cleaning side chamber 311, and then enters the air inlet of the electric fan 112 from the upper opening 312a, and finally is discharged from the air outlet of the electric fan 112 to the outer shell 111. At the same time, during the operation of the electric fan 112, the pressure difference between the cleaning bin side chamber 313 and the middle chamber 312 helps to press the cleaning bin damper plate 35, so as to ensure the sealing of the cleaning bin air passage RC, and thus ensure that the floor cleaning work is performed efficiently, stably and reliably.

[0089] When the user finishes the cleaning work, closes the electric fan 112, and places the cleaner 10 on the base station 20, the bottom cover 113b is opened, the suction nozzle 13 is directed to the surface of the base 25, the attitude sensing unit generates a first sensing signal, and the motor 37 is driven to start based on the signal, the output shaft is rotated by 180°, and the guide rod 36 is moved to the right by the eccentric wheel mechanism 38 to move the cleaning door plate 35 away from the cleaning door frame 332 until the back side 352 of the cleaning door plate 35 contacts the cleaning door opening limiting structure 313b, the cleaning door plate 35 is in the air passage opening position, the cleaning side chamber 313 is ventilated, and the cleaning air passage RC is turned on. At the same time, the suction door plate 34 is moved from the cleaning door opening limiting structure 311b to the closed side 341 in contact with the suction door frame 322, the suction door 32 is in the air passage closed position, the cleaning side chamber 311 is not ventilated, and the suction air passage RF is closed. Enter the cleaning state. After the electric fan 112 is turned on, the negative pressure is continuously generated, the external gas enters the suction nozzle 13, then enters the extension pipe 12, and then enters the main body air inlet pipe 114, and then enters the dust cup 113, and then the dust cup 113 is sent to 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 re-filtering, the filtered gas enters the base station air outlet 214, then enters the main body connecting pipe 115 upward along the base station air outlet 214, then enters the electric fan 112 inlet through the open cleaning door plate 35, and is discharged from the electric fan 112 outlet. At the same time, during the operation of the electric fan 112, the pressure difference between the cleaning side chamber 311 and the intermediate chamber 312 helps to press the suction door plate 34, ensures the sealing of the suction air passage RC, and ensures that the cleaning work is efficient, stable, and reliable.

[0090] After the cleaning is completed, the electric fan 112 is turned off. The next time the cleaner 10 is moved away from the base station 20, the attitude sensing unit generates a second sensing signal, the motor 37 is driven to start and rotate 180° based on the signal, and at the same time the eccentric wheel mechanism 38 drives the guide rod 36 to move to the left to the position where the suction door plate 34 is in the air passage opening position, the cleaning door plate 35 is in the air passage closed position, and the cleaner 10 enters the cleaning state.

[0091] In summary, in the dust collector and dust collection system of the present embodiment, the part of the ground air suction path formed between the air inlet of the electric fan and the exhaust port of the dust cup and the part of the cleaning bin air path formed between the air inlet of the electric fan and the outlet of the cleaning bin connecting pipe of the base station are basically the shortest straight lines, so that the airflow circulation path is the shortest and the resistance is the smallest. Further, the stable pushing and pulling force and accurate displacement are provided by the guide rod, the unique chamber and the two sets of air door plates and door frames are arranged, and the elastic sealing element at the sealing surface is arranged to play a sealing compensation role. After the electric fan is operated, the airflow in the middle chamber is always high-speed circulation, and the air pressure is always the lowest, while the air pressure in the side chamber is higher. Based on the air pressure difference between the different chambers, the closing air door plate is assisted to make the dust collector and dust collection system of the present scheme have the most simple, reliable and stable air path conversion structure, which can effectively avoid the influence of environmental and abnormal conditions, such as high air humidity, occasional falling or impact, forgetting to install the filter in the dust cup, etc. These conditions will not affect the smooth conversion of the air path of the present scheme. The dust collector and dust collection system of the present scheme can meet the reliable and stable use of users and be durable.

[0092] <Variant>

[0093] In the present variant, the same symbols are given to the structures mentioned in the embodiments, and the same descriptions are omitted.

[0094] In the above embodiments, a limit stop rib 345 and 355 is arranged at the inner circle position of the elastic sealing gasket 344 and 354, which facilitates the fixation of the elastic sealing gasket 344 and 354. However, in order to make the alignment of the air door plate and the door frame easier, the limit stop rib can also be removed. As shown in FIG. 18, in the present variant, no limit stop rib is arranged at the inner circle position of the elastic sealing gaskets 344I and 354I, and the width of the elastic sealing gaskets 344I and 354I can be increased, which is more conducive to the alignment and sealing of the air door plate and the door frame.

[0095] Further, in order to facilitate rotation and ensure the fixation of the position of the elastic sealing gasket and facilitate assembly, the elastic sealing gasket is prevented from being separated from the surface of the air door plate body. As shown in FIG. 19(a), a groove is arranged on the cleaning bin air door plate body 350II, and the elastic sealing gasket 354II is embedded and fixed in the groove. The elastic sealing gasket on the ground air door plate is arranged in the same way.

[0096] Further, as shown in FIG. 19(b), in order to further reduce the alignment difficulty and improve the sealing effect at the sealing surface, the width of the elastic sealing gasket 354III can be extended to cover the entire cleaning bin air door plate body 350III, and only the middle part is opened to allow the guide rod 36 to pass through. The elastic sealing gasket on the ground air door plate is arranged in the same way.

[0097] The above examples and variants are only examples of the technical solutions of the present application. The vacuum cleaner and the vacuum system involved in the present application are not limited to the above examples, but are limited to the scope defined in the claims. Any modification or supplement or equivalent replacement made by the skilled in the art on the basis of the examples is within the scope claimed by the claims of the present application. For example, in the present solution, the inlet end of the base station exhaust passage can also be located on the side of the base station body.

Claims

1. A dust extraction system characterised in that, The dust collector comprises an electric fan and a dust cup, and a negative pressure generated by the electric fan forms a ground suction air path, so that air flow along the air path sucks dirt from a surface to be cleaned into the dust cup. The base station is matched with the dust collector and, after being connected with the dust collector, forms a dust removal air path with the dust collector based on the negative pressure generated by the electric fan, so that air flow along the air path sucks dirt from the dust cup. The air path conversion part converts the ventilation state of the ground suction air path and the dust removal air path, and comprises a dust removal air door arranged on the dust removal air path and opening and closing the air path, a ground suction air door arranged on the ground suction air path and opening and closing the air path, and a conversion piece connected with the movable part of each air door and converting the two air doors into an alternating opening and closing state. In each air door, the closing surface side of the movable part is at a position with lower air pressure than the back surface side when the air door is in the closed state.

2. The dust collection system according to claim 1, wherein each air door comprises an air door plate and a door frame, and the corresponding air door is closed when the air door plate and the door frame are in close contact, the area of mutual contact between the air door plate and the door frame when the air door is closed is a closing surface, the opposite side of the closing surface is a back surface side, the closing surface is provided with an elastic sealing piece, and the side of the air door plate or the door frame on which the closing surface is located is the closing surface side.

3. The dust collection system according to claim 1, wherein the air path conversion part comprises a ventilation chamber, two door frames, two air door plates and a guide rod. wherein The ventilation chamber is arranged between the air inlet of the electric fan and the air outlet of the dust cup, the two door frames are arranged in a horizontal direction and separate the ventilation chamber into three chambers, the middle chamber has an upper opening open to the air inlet of the electric fan, and the two side chambers correspond to the ground suction air path and the dust removal air path respectively, and the bottom of each side chamber is provided with a lower opening in communication with the corresponding air path. The two door frames form ventilation openings of the two side chambers respectively, the ventilation openings are in communication with the upper opening, and the two air door plates are movably arranged in the two side chambers and are arranged such that when the air door plate in one side chamber is in an air path closing position in close contact with the door frame, the air door plate in the other side chamber is in an air path opening position away from the door frame. wherein The guide rod is arranged as the conversion piece and is arranged to drive the two air door plates to move back and forth relative to the two door frames, so that the corresponding air paths of the two side chambers are alternately opened and closed.

4. The dust collection system according to claim 3, wherein the top of the middle chamber is at least 2 / 3 open, and among the three chambers, the middle chamber has the largest volume and top area.

5. The dust collection system according to claim 3, wherein the area of the upper opening and the sum of the areas of the two lower openings are greater than or equal to 3 / 4 of the longitudinal cross-sectional area of the ventilation chamber, and the ventilation chamber spans the top of the dust cup.

6. The dust collection system according to claim 3, wherein ​ wherein ​ ​ wherein ​ ​ wherein The closing surfaces of the two damper plates are oppositely arranged and both face the middle chamber; the closing surface of the damper plate or the closing surface of the door frame is provided with a ring of elastic sealing gasket.

7. The dust collection system of claim 3, wherein: wherein In the closed state, the closing surface area of the damper plate is provided with an elastic sealing gasket, and the elastic sealing gasket covers and exceeds the closing surface area; the elastic sealing gasket is embedded on the damper plate body and protrudes towards the door frame.

8. The dust collection system of claim 3, wherein: wherein, Along the axial direction of the guide rod, two bearing support members are arranged at intervals, one outside the ventilation chamber and the other inside the ventilation chamber; the bearing support member includes a bracket and a bearing, the bracket supports the bearing, and the bearing has a middle part through which the guide rod is movably arranged and supports the guide rod; the bracket of the bearing support member inside the ventilation chamber has a cross-sectional area less than 1 / 4 of the cross-sectional area of the chamber.

9. The dust collection system of claim 3, wherein: wherein The upper and lower housings surrounding the ventilation chamber are respectively matched in shape and structure with the air inlet side of the electric fan and the air outlet side of the dust cup; after the dust collector is connected with the base station, a vertical projection is made from top to bottom, the middle chamber and one side chamber overlap with the air inlet of the electric fan and the air outlet of the dust cup, and the lower opening of the other side chamber as the cleaning bin lower opening does not overlap with the air outlet area; The base station is provided with a cleaning bin connecting pipe matched with the dust collector; the cleaning bin lower opening corresponds to the cleaning bin connecting pipe.

10. A dust collector capable of independently forming a floor air path and forming a warehouse air path in cooperation with a base station, comprising: The electric fan and the dust cup, further comprising: A wind path conversion part for converting the ventilation state of the ground suction wind path and the cleaning bin wind path, including a cleaning bin damper provided on the cleaning bin wind path to open and close the wind path, a ground suction damper provided on the ground suction wind path to open and close the wind path, and a conversion member connected with the movable part of each damper to convert the two dampers to alternately open and close; Wherein, the damper is arranged such that in the closed state, the closing surface side of the movable part is at a position with lower air pressure than the back side.

Images