Self-cleaning system of double-air-duct dust collector

Abstract

The invention relates to the technical field of cleaning and discloses a double-air-duct dust collector self-cleaning system.The dust collector comprises a dust cup, a driving part is installed at one end of the dust cup, a backflow air duct and an inlet air duct communicated with an inner cavity of the backflow air duct are further arranged on the outer side of the dust cup, and a vacuum motor is arranged on the inner side of the driving part; an air inlet of the vacuum motor is communicated with the backflow air duct or an inner cavity of the dust cup through the air duct switching assembly; the cleaning system comprises a base station, and a dust collection cavity and a middle air duct which communicate with each other are formed in the base station. The inlet air channel, the dust cup inner cavity and the vacuum motor are sequentially communicated to form an internal air channel of the dust collector, the inlet air channel, the dust cup inner cavity, the dust collection cavity, the middle connection air channel, the backflow air channel and the vacuum motor are sequentially communicated to form an external air channel, and the vacuum motor is controlled to be communicated with the dust cup inner cavity or the backflow air channel through the air channel switching assembly. And the dust collector and the base station share one vacuum motor, so that the noise generated when the system works and the cost of the whole machine can be reduced.

Description

Technical Field

[0001] The invention relates to the field of cleaning technology, and in particular to a dual-duct vacuum cleaner self-cleaning system. Background Art

[0002] A handheld vacuum cleaner is a small household cleaning tool designed to be easy to carry and use. It mainly uses the suction and pressure generated by the high-speed rotation of an electric exhaust fan to form a short vacuum state inside, forming a negative pressure due to the pressure difference with the external atmospheric pressure, causing dust and other impurities to be sucked in and collected in the dust collecting component.

[0003] Handheld vacuum cleaners have brought great convenience to people's lives in terms of hygiene and cleaning, but cleaning the garbage inside the vacuum cleaner is often troublesome and easily causes dust to overflow, causing secondary pollution to the user.

[0004] In order to solve the above problems, a Chinese patent with publication number CN117796704A announced on April 2, 2024 a base station type vacuum cleaner with a self-cleaning function, including a vacuum cleaner and a base station, the main body of the vacuum cleaner has a dust cup, a main cover is provided at the bottom of the dust cup, a sub-cover is provided in the middle of the main cover, and the upper part of the sub-cover is hinged to the main cover; the base station includes a bracket head, and the bracket head is provided with a main body storage part for docking the vacuum cleaner main body; the main body storage part is opened at the top of the bracket head and the side close to the vacuum cleaner, and a circular dust outlet is provided on the side wall of the main body storage part corresponding to the main cover, and the diameter of the dust outlet is larger than the sub-cover and smaller than the main cover; a ventilation cavity is provided in the bracket head, the upper part of the ventilation cavity is connected with the dust outlet, and the lower part is provided with a connecting port; a detachable dust box is provided in the dust storage part, and a filter is provided at the lower part of the dust box; the upper part of the dust box is connected with the connecting port, and the bottom is connected with the driving part; the driving part includes a fan for generating negative pressure in the dust box and the ventilation cavity. The base station type vacuum cleaner with a self-cleaning function of the present invention realizes two cleaning modes of the vacuum cleaner, namely manual cleaning and automatic cleaning, by arranging a sub-cover on the dust cup cover and a spoiler column on the sub-cover in a "cover-in-cover" manner. After use, the vacuum cleaner can be directly placed on the base station to complete the cleaning of the dust cup, which is convenient and quick.

[0005] However, the base station is also internally provided with a driving unit for dust cleaning (i.e., a fan that generates negative pressure), which not only increases the cost of the entire machine, but also generates a large noise during operation, affecting the user experience. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a dual-duct vacuum cleaner self-cleaning system, which realizes the switching between the inner and outer air ducts through an air duct switching assembly, so that the vacuum motor of the vacuum cleaner can not only provide negative pressure for cleaning dust and other dirt, but also can be used as a component for generating self-cleaning negative pressure suction.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A dual-air duct vacuum cleaner self-cleaning system, the vacuum cleaner comprises a dust cup, one end of the dust cup is equipped with a driving part for generating negative pressure suction, the other end is equipped with a bottom cover that can be opened and closed, and the outer side of the dust cup is provided with an inlet air duct connected with the inner cavity thereof, the outer side of the dust cup is also provided with a return air duct, the inner side of the driving part is provided with a vacuum motor, and the air inlet of the vacuum motor is connected with the return air duct or the inner cavity of the dust cup through an air duct switching component; The cleaning system comprises a base station for placing a vacuum cleaner, wherein a dust collecting chamber and a central air duct interconnected with each other are provided inside the base station, and a through hole is provided on the top of the base station; When the vacuum cleaner is placed on the base station, the upper and lower ends of the return air duct are respectively connected to the air inlet of the vacuum motor and the central air duct, and the inner cavity of the dust cup is connected to the dust collecting cavity through the through hole.

[0008] Optionally, a bracket is provided between the dust cup and the driving part, the bracket is installed at one end of the dust cup close to the driving part, and the air duct switching assembly is located on the inner side of the bracket.

[0009] Optionally, the air duct switching assembly includes a base plate connected to the bracket, a bottom hole connected to the inner cavity is formed on the base plate, a sliding sealing plate for closing or connecting the inner cavity and the air inlet is slidably installed above the base plate, side sealing plates for closing or connecting the air inlet and the return air duct are arranged on both sides of the sliding sealing plate, and the side sealing plates can be raised and lowered along the axial direction of the dust cup.

[0010] Optionally, a guide column parallel to the axis of the bracket is fixedly mounted on the inner side of the bracket, the side sealing plate is slidably sleeved on the guide column, and an inclined guide groove is provided on the side surface of the side sealing plate; The sliding sealing plate is provided with top holes corresponding to the positions and numbers of the bottom holes, and both sides of the sliding sealing plate are provided with outwardly protruding touch rods, and the ends of the touch rods are slidably embedded in the guide grooves; wherein the bottom plate and the sliding sealing plate are both inclined.

[0011] Optionally, one end of the sliding sealing plate is connected to a release button, and the other end is provided with a first spring for resetting, one end of the release button passes through the side wall of the bracket and extends to the outside of the dust cup, and the two ends of the first spring are respectively abutted against the inner wall of the bracket and the sliding sealing plate.

[0012] Optionally, a limiting rod is also fixedly installed on the inner side of the bracket, one end of the sliding sealing plate is provided with a limiting groove parallel to the axis direction of the first spring, and one end of the limiting rod is slidably inserted into the limiting groove.

[0013] Optionally, a support connected to the base station is provided on the outer side of the through hole, a second release boss for releasing the bottom cover is provided on the inner side of the support, a first release boss for closing the sliding sealing plate and the bottom plate is provided above the second release boss, and after the first release boss abuts against the release button, the air inlet of the vacuum motor is connected to the return air duct.

[0014] Optionally, the inner side surface of the support corresponds to the outer contour of the dust cup, and a positioning groove for positioning the vacuum cleaner is also provided on the base station.

[0015] Optionally, a sealing gasket is provided between the bottom plate and the sliding sealing plate, the sealing gasket is provided with avoidance holes corresponding to the positions and number of the bottom holes, and the sealing gasket is fixedly mounted on the top of the bottom plate.

[0016] Optionally, two of the return air duct and the intermediate air duct are provided, and one end of the intermediate air duct away from the through hole is connected to the dust collecting chamber from the bottom.

[0017] Beneficial Effects

[0018] (1) In the present invention, the inlet air duct, the dust cup cavity and the vacuum motor are connected in sequence to form the internal air duct of the vacuum cleaner, and the inlet air duct, the dust cup cavity, the dust collecting cavity, the central air duct, the return air duct and the vacuum motor are connected in sequence to form the external air duct. In this process, the vacuum motor is controlled to be connected to the dust cup cavity or the return air duct through the air duct switching component, and the vacuum cleaner and the base station share a vacuum motor, which can reduce the noise generated when the system is working and the cost of the whole machine.

[0019] (2) In the present invention, the sliding sealing plate can slide relative to the bottom plate under the action of the release button and the first spring, and the opening and closing between the top hole and the bottom hole can be realized through the positional relationship between the two holes, and the side sealing plate can be driven to rise and fall along the axis through the touch rod to realize the closure or conduction between the air inlet and the return air duct; the air duct switching component completely relies on mechanical triggering and structural linkage to realize the switching of the air duct, which is not only stable and reliable, but also low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural schematic diagram of a dual-duct vacuum cleaner self-cleaning system according to an embodiment of the present invention; Figure 2 Schematic diagram of the internal structure of the dual-duct vacuum cleaner self-cleaning system according to an embodiment of the present invention; Figure 3 is a schematic diagram of the position structure of a vacuum cleaner and a base station in an embodiment of the present invention; Figure 4 is a schematic diagram of the position structure of the vacuum cleaner and the base station from another perspective in an embodiment of the present invention; Figure 5 is a schematic structural diagram of a vacuum cleaner according to an embodiment of the present invention; Figure 6 is a schematic diagram of a structure in which the internal air duct is in a conducting state in an embodiment of the present invention; Figure 7 is a schematic diagram of a structure in which the internal air duct is in a closed state in an embodiment of the present invention; Figure 8 is a schematic diagram of the internal structure of the air duct switching component when it is turned on in an embodiment of the present invention; Fig. 9 is a schematic diagram of the internal structure of the air duct switching assembly when it is closed in an embodiment of the present invention; Among them, 1, base station; 11, dust collection chamber; 12, central air duct; 13, positioning groove; 2, support; 3, first release boss; 4, second release boss; 5. Dust cup; 51. Inlet air duct; 52. Bottom cover; 6. Driving unit; 61. Vacuum motor; 7. Return air duct; 8. Air duct switching assembly; 81. Bottom plate; 82. Bottom hole; 83. Sliding sealing plate; 831. Touch rod; 832. Limit rod; 833. Limit groove; 84. Top hole; 85. Release button; 86. First spring; 87. Side sealing plate; 88. Guide column; 89. Guide groove; 9. Sealing pad; 10. Bracket. DETAILED DESCRIPTION

[0021] The present invention will now be further described in detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0022] Embodiment 1

[0023] like Figure 1-Figure 5 As shown, the vacuum cleaner includes a dust cup 5, one end of which is equipped with a driving part 6 for generating negative pressure suction, and the other end is equipped with a bottom cover 52 that can be opened and closed, and the outer side of the dust cup 5 is provided with a return air duct 7 and an inlet air duct 51 connected to the inner cavity of the dust cup 5; the inner side of the driving part 6 is provided with a vacuum motor 61, and the air inlet of the vacuum motor 61 is connected to the return air duct 7 or the inner cavity of the dust cup 5 through the air duct switching component 8, that is, under the action of the air duct switching component 8, the vacuum motor 61 is only connected to the return air duct 7 or one of the inner cavities of the dust cup 5 at the same time.

[0024] When the inlet air duct 51, the inner cavity of the dust cup 5 and the vacuum motor 61 are connected in sequence, an internal air duct of the vacuum cleaner is formed, and the vacuum cleaner can now perform normal dirt suction work independently; when the vacuum motor 61 is connected to the return air duct 7, an external air duct of the vacuum cleaner is formed; and the function of the air duct switching component 8 is to realize the switching between the internal and external air ducts.

[0025] When the vacuum cleaner is used alone, with its internal air duct connected and its external channel closed, the vacuum cleaner can perform normal dirt suction work. When the vacuum cleaner is placed in a cleaning system, with its external air duct connected and its internal air duct closed, the vacuum cleaner can perform self-cleaning work with the assistance of the cleaning system, that is, automatically dump the dirt and garbage accumulated in the dust cup 5.

[0026] The cleaning system includes a base station 1 for placing a vacuum cleaner, the interior of the base station 1 is provided with a dust collecting chamber 11 and a central air duct 12 which are interconnected, and a through hole is provided on the top of the base station 1; when the vacuum cleaner is placed on the base station 1, the upper and lower ends of the return air duct 7 are respectively connected to the air inlet of the vacuum motor 61 and the central air duct 12, and the inner cavity of the dust cup 5 is connected to the dust collecting chamber 11 through the through hole.

[0027] The inlet air duct 51, the inner cavity of the dust cup 5 and the vacuum motor 61 are connected in sequence to form an internal air duct. At this time, the external dirt enters the inner cavity of the dust cup 5 along the inlet air duct 51 along with the air. Under the filtration of the filter components such as the filter net, the dirt is retained in the inner cavity of the dust cup 5, and the air passes through the filter components and is discharged to the external environment upward through the vacuum motor 61.

[0028] The inlet air duct 51, the inner cavity of the dust cup 5, the dust collecting chamber 11, the central air duct 12, the return air duct 7 and the vacuum motor 61 are connected in sequence to form an external air duct. At this time, the vacuum cleaner is placed on the base station 1, and the bottom cover 52 is in an open state; the vacuum motor 61 generates negative pressure suction, and the external clean air enters the inner cavity of the dust cup 5 along the inlet air duct 51, and blows the dirt downward into the dust collecting chamber 11 of the base station 1. A filter component is also provided between the dust collecting chamber 11 and the central air duct 12. Under its action, the dirt is intercepted in the dust collecting chamber 11, and the filtered air is discharged to the external environment along the central air duct 12, the return air duct 7 and the vacuum motor 61 in sequence.

[0029] Among them, a dust bag with good filtering performance can also be put into the dust collecting chamber 11, and all the dirt blown into the dust collecting chamber 11 will enter the dust collecting bag, which can be convenient for unified collection and treatment later.

[0030] The vacuum motor 61 is controlled to communicate with the inner cavity of the dust cup 5 or the return air duct 7 through the air duct switching component 8, and the vacuum cleaner and the base station 1 share a vacuum motor 61, which can reduce the noise generated by the system during operation and the cost of the whole machine.

[0031] Furthermore, two return air ducts 7 and two central air ducts 12 are provided, and one end of the central air duct 12 away from the through hole is connected with the dust collecting chamber 11 from the bottom. The two air ducts are provided to improve the ventilation efficiency of the external air ducts. The central air duct 12 is connected with the dust collecting chamber 11 from the bottom, which can provide a larger space for dust collection in the dust collecting chamber 11, so that there is a larger accommodating space between the air inlet and the air outlet of the dust collecting chamber 11.

[0032] In addition, a support 2 connected to the base station 1 is arranged on the outside of the through hole, the inner side surface of the support 2 corresponds to the outer contour of the dust cup 5, and a second release boss 4 for releasing the bottom cover 52 is arranged on the inner side of the support 2, and a positioning groove 13 for positioning the vacuum cleaner is also provided on the base station 1.

[0033] The connection between the bottom cover 52 and the dust cup 5 adopts the existing common connection method, that is, one end of the bottom cover 52 is rotatably connected to the dust cup 5, and a torsion spring is arranged at the connection, and the other end is snap-connected by a snap structure, and the bottom cover 52 is released after the snap button is pressed; based on this, a second release boss 4 is arranged on the support 2 at a position corresponding to the snap button, and when the vacuum cleaner is placed on the base station 1, the end of the second release boss 4 abuts against the snap button, thereby finally achieving the purpose of releasing the bottom cover 52.

[0034] The purpose of the correspondence between the inner side surface and the outer side contour is to make the connection between the vacuum cleaner and the base station 1 more stably and closely fit; and the positioning groove 13 is used to place the vacuum cleaner pipe and nozzle, and the inlet air duct 51 is located inside the pipe. Under the action of the positioning groove 13, it can be ensured that the position of the vacuum cleaner is consistent each time, and that when the vacuum cleaner is placed on the base station 1, its bottom cover 52 can be released through the second release boss 4.

[0035] Embodiment 2

[0036] On the basis of the first embodiment, the present invention further proposes a specific structure of the air duct switching component 8 .

[0037] like Figure 6-Figure 9 As shown, a bracket 10 is provided between the dust cup 5 and the driving part 6, the bracket 10 is installed at one end of the dust cup 5 close to the driving part 6, and the air duct switching component 8 is located on the inner side of the bracket 10; the bracket 10 is divided into an upper and lower cavity, the lower cavity is used to install filter components such as filter cotton, and the upper cavity is used to install the air duct switching component 8 to realize the switching of internal and external air ducts.

[0038] The air duct switching assembly 8 includes a bottom plate 81 integrally connected to the bracket 10, the bottom plate 81 divides the internal cavity of the bracket 10 into an upper and lower cavity, and a bottom hole 82 connected to the inner cavity of the dust cup 5 is opened on the bottom plate 81, and a sliding sealing plate 83 for closing or connecting the inner cavity and the air inlet is slidably installed above the bottom plate 81, and side sealing plates 87 for closing or connecting the air inlet and the return air duct 7 are arranged on both sides of the sliding sealing plate 83, and the side sealing plates 87 can be raised and lowered along the axial direction of the dust cup 5. The air inlet here refers to the air inlet of the vacuum motor 61.

[0039] Specifically, when the sliding sealing plate 83 moves laterally, it can block or release the bottom hole 82 on the bottom plate 81 by itself, and when the side sealing plate 87 moves vertically, it can block or connect the return air duct 7 and the upper cavity by itself; that is, the inner cavity of the dust cup 5 is connected with the lower cavity, and the lower cavity can be connected with the upper cavity through the bottom hole 82, and the upper cavity is connected with the air inlet of the vacuum motor 61. At the same time, the sliding sealing plate 83 is used to control the opening and closing of the bottom hole 82, and the side sealing plate 87 is used to control the opening and closing between the return air duct 7 and the upper cavity.

[0040] As mentioned above, a guide column 88 parallel to the axis of the bracket 10 is fixedly installed on the inner side of the bracket 10, and the side sealing plate 87 is slidably mounted on the guide column 88, and an inclined guide groove 89 is provided on the side of the side sealing plate 87; a top hole 84 corresponding to the position and number of the bottom hole 82 is provided on the sliding sealing plate 83, and outwardly protruding touch rods 831 are provided on both sides of the sliding sealing plate 83, and the ends of the touch rods 831 are slidably embedded in the guide groove 89; wherein, the bottom plate 81 and the sliding sealing plate 83 are both inclined, and the inclination directions of the bottom plate 81 and the guide groove 89 are opposite, and a second spring is provided on the guide column 88 for resetting the side sealing plate 87.

[0041] Under the limitation of the guide column 88, the side sealing plate 87 can only be raised and lowered along its axial direction. Because the end of the touch rod 831 slides into the guide groove 89, and the sliding sealing plate 83 and the guide groove 89 are inclined in opposite directions; based on this, when the sliding sealing plate 83 slides along the top surface of the bottom plate 81, the side sealing plate 87 can be driven to rise and fall through the touch rod 831.

[0042] In the initial state, the top hole 84 on the sliding sealing plate 83 is aligned with the bottom holes 82 on the bottom plate 81 in sequence, so that the upper and lower cavities of the bracket 10 are connected. At this time, the side sealing plate 87 is in the lower position to separate the upper cavity from the return air duct 7; when the sliding sealing plate 83 moves horizontally along the bottom plate 81 to the position where the top hole 84 and the bottom hole 82 are misaligned, the upper and lower cavities are separated by the sliding sealing plate 83, and the side sealing plate 87 is in the upper position driven by the touch rod 831, and the second spring is in a compressed state, so that the upper cavity and the return air duct 7 are connected.

[0043] Furthermore, one end of the sliding sealing plate 83 is connected to a release button 85, and the other end is provided with a first spring 86 for resetting. One end of the release button 85 passes through the side wall of the bracket 10 and extends to the outside of the dust cup 5. The two ends of the first spring 86 are respectively abutted against the inner wall of the bracket 10 and the sliding sealing plate 83.

[0044] The release button 85 and the sliding sealing plate 83 are connected in one piece. By pressing the release button 85, the sliding sealing plate 83 can be pushed to move; after the button 85 is released, the sliding sealing plate 83 moves a certain distance, and the first spring 86 is compressed to store elastic potential energy; at the same time, driven by the touch rod 831, the side sealing plate 87 moves upward, and the second spring is also compressed, the external air duct is connected, and the internal air duct is closed; after releasing the release button 85, under the elastic force of the first spring 86 and the second spring, the sliding sealing plate 83 and the side sealing plate 87 are reset, the internal air duct is connected, and the external air duct is closed.

[0045] In order to ensure that the bottom hole 82 and the top hole 84 can be misaligned when the sliding sealing plate 83 moves, a limiting rod 832 is fixedly installed on the inner side of the bracket 10, and one end of the sliding sealing plate 83 is provided with a limiting groove 833 parallel to the axis direction of the first spring 86, and one end of the limiting rod 832 is slidably penetrated in the limiting groove 833. There are multiple bottom holes 82 and top holes 84, and they are distributed at equal intervals; the distance that the limiting rod 832 moves relative to the limiting groove 833 is the distance that the sliding sealing plate 83 moves relative to the bottom plate 81.

[0046] In order to ensure the sealing between the bottom plate 81 and the sliding sealing plate 83, a sealing gasket 9 is arranged between the two, and the sealing gasket 9 is provided with avoidance holes corresponding to the positions and numbers of the bottom holes 82, and the sealing gasket 9 is fixedly installed on the top of the bottom plate 81. That is, the avoidance holes and the bottom holes 82 overlap with each other, and the top holes 84 and the avoidance holes and the top holes 84 and the bottom holes 82 have the same relative positions.

[0047] In addition, a first release boss 3 for closing the sliding sealing plate 83 and the bottom plate 81 is provided above the second release boss 4 , and after the first release boss 3 abuts against the release button 85 , the air inlet of the vacuum motor 61 is connected to the return air duct 7 .

[0048] The buckle button and the release button 85 are in the same longitudinal direction of the outside of the dust cup 5. When the vacuum cleaner is placed on the base station 1, the buckle button first contacts the second release boss 4, so that the bottom cover 52 is released and flipped longitudinally, and one end of the bottom cover passes through the through hole and enters the dust collecting chamber 11; then the vacuum cleaner is placed upright, and the release button 85 just abuts against the first release boss 3. Under the restriction of the first release boss 3, the release button 85 is pushed backward, driving the sliding sealing plate 83 to move a certain distance, so that the sliding sealing plate 83 is in a closed state, and the side sealing plate 87 is opened in conjunction, thereby closing the internal channel and opening the external channel. At this time, the vacuum motor 61 of the vacuum cleaner can be started to self-clean the inside of the dust cup 5.

[0049] Working principle: When the handheld vacuum cleaner is not placed in the base station 1 and is used normally alone, the sliding sealing plate 83 is in an open state, the side sealing plate 87 is in a closed state, the bottom cover 52 of the dust cup 5 is closed, and the vacuum motor 61 is working. At this time, the inside of the dust cup 5 is in a negative pressure state, and dust, garbage and other materials are sucked into the dust cup 5 along the inlet air duct 51; When the handheld vacuum cleaner is placed in the base station 1, the release button 85 and the buckle button of the sliding sealing plate 83 and the bottom cover 52 are triggered, causing the sliding sealing plate 83 to close and the linked side sealing plate 87 to open. At this time, the handheld vacuum cleaner is started, and the dust collecting chamber 11 is connected to the central air duct 12. Clean air is sucked in from the inlet air duct 51, and the dirty dust inside is taken away when passing through the dust cup 5. If a dust collecting bag is installed in the dust collecting chamber 11, the air with dust and dirt is finally sucked into the dust collecting bag of the base station 1, and the dirt and dust are retained in the bag. The filtered air is discharged to the external environment through the vacuum motor 61 along the central air duct 12 and the return air duct 7.

[0050] To sum up, the present invention proposes a dual-duct vacuum cleaner self-cleaning system. The vacuum cleaner adopts a dual-duct structure. The vacuum motor 61 of the handheld device realizes the vacuuming function of the handheld device and the cleaning function of the base station 1 for the handheld device dust cup 5. The base station 1 itself does not need an additional vacuum motor 61. The handheld device and the base station 1 only need one vacuum motor 61, which reduces the cost of the whole machine and the noise generated during operation; and the sliding sealing plate 83 and the side sealing plate 87 of the air duct switching assembly 8 and other active structures completely rely on mechanical triggering and structural linkage to realize the switching of the air duct, which is not only stable and reliable, but also low in cost.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0053] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A dual-air duct vacuum cleaner self-cleaning system, the vacuum cleaner comprising a dust cup (5), one end of the dust cup (5) being provided with a driving unit (6) for generating negative pressure suction, the other end being provided with an openable and closable bottom cover (52), and the outer side of the dust cup (5) being provided with an inlet air duct (51) communicating with the inner cavity thereof, characterized in that: A return air duct (7) is further provided on the outer side of the dust cup (5), a vacuum motor (61) is provided on the inner side of the driving part (6), and an air inlet of the vacuum motor (61) is connected to the return air duct (7) or the inner cavity of the dust cup (5) via an air duct switching component (8); The cleaning system comprises a base station (1) for placing a vacuum cleaner, the interior of the base station (1) is provided with a dust collecting chamber (11) and a central air duct (12) which are interconnected, and the top of the base station (1) is provided with a through hole; When the vacuum cleaner is placed on the base station (1), the upper and lower ends of the return air duct (7) are respectively connected to the air inlet of the vacuum motor (61) and the central air duct (12), and the inner cavity of the dust cup (5) is connected to the dust collecting cavity (11) through the through hole.

2. The dual-duct vacuum cleaner self-cleaning system according to claim 1, characterized in that: A bracket (10) is provided between the dust cup (5) and the driving part (6); the bracket (10) is mounted on one end of the dust cup (5) close to the driving part (6), and the air duct switching assembly (8) is located on the inner side of the bracket (10).

3. The dual-duct vacuum cleaner self-cleaning system according to claim 2, characterized in that: The air duct switching assembly (8) comprises a bottom plate (81) connected to the bracket (10), the bottom plate (81) being provided with a bottom hole (82) communicating with the inner cavity, a sliding sealing plate (83) for closing or connecting the inner cavity with the air inlet being slidably mounted above the bottom plate (81), side sealing plates (87) for closing or connecting the air inlet with the return air duct (7) being arranged on both sides of the sliding sealing plate (83), and the side sealing plates (87) being capable of rising and falling along the axial direction of the dust cup (5).

4. The dual-duct vacuum cleaner self-cleaning system according to claim 3, characterized in that: A guide column (88) parallel to the axis of the bracket (10) is fixedly mounted on the inner side of the bracket (10), the side sealing plate (87) is slidably sleeved on the guide column (88), and an inclined guide groove (89) is formed on the side surface of the side sealing plate (87); The sliding sealing plate (83) is provided with top holes (84) corresponding to the positions and number of the bottom holes (82); both sides of the sliding sealing plate (83) are provided with outwardly protruding touch rods (831), and the ends of the touch rods (831) are slidably embedded in the guide grooves (89); wherein the bottom plate (81) and the sliding sealing plate (83) are both arranged at an inclination.

5. The dual-duct vacuum cleaner self-cleaning system according to claim 4, characterized in that: One end of the sliding sealing plate (83) is connected to a release button (85), and the other end is provided with a first spring (86) for resetting, one end of the release button (85) passes through the side wall of the bracket (10) and extends to the outside of the dust cup (5), and the two ends of the first spring (86) are respectively in contact with the inner wall of the bracket (10) and the sliding sealing plate (83).

6. The dual-duct vacuum cleaner self-cleaning system according to claim 5, characterized in that: A limiting rod (832) is also fixedly mounted on the inner side of the bracket (10); one end of the sliding sealing plate (83) is provided with a limiting groove (833) parallel to the axial direction of the first spring (86); and one end of the limiting rod (832) is slidably inserted into the limiting groove (833).

7. The dual-duct vacuum cleaner self-cleaning system according to claim 6, characterized in that: A support (2) connected to the base station (1) is arranged on the outer side of the through hole, a second release boss (4) for releasing the bottom cover (52) is arranged on the inner side of the support (2), a first release boss (3) for closing the sliding sealing plate (83) and the bottom plate (81) is arranged above the second release boss (4), and after the first release boss (3) abuts against the release button (85), the air inlet of the vacuum motor (61) is connected to the return air duct (7).

8. The dual-duct vacuum cleaner self-cleaning system according to claim 7, characterized in that: The inner side surface of the support (2) corresponds to the outer contour of the dust cup (5), and a positioning groove (13) for positioning the vacuum cleaner is also provided on the base station (1).

9. The dual-duct vacuum cleaner self-cleaning system according to claim 4, characterized in that: A sealing gasket (9) is provided between the bottom plate (81) and the sliding sealing plate (83), the sealing gasket (9) being provided with avoidance holes corresponding to the positions and number of the bottom holes (82), and the sealing gasket (9) being fixedly mounted on the top of the bottom plate (81).

10. The dual-duct vacuum cleaner self-cleaning system according to any one of claims 1 to 9, characterized in that: Two return air ducts (7) and two intermediate air ducts (12) are provided, and one end of the intermediate air duct (12) away from the through hole is connected to the dust collecting chamber (11) from the bottom.

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