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

Abstract

The utility model relates to the technical field of cleaning, and discloses a double-air-duct dust collector self-cleaning system, a 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 utility model relates to the technical field of cleaning, in particular to a self-cleaning system for a double-air duct vacuum cleaner. 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, the Chinese patent with publication number CN117796704A published 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 hanging head, and the hanging 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 hanging 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 hanging head, the upper part of the ventilation cavity is connected to 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 to the connecting port, and the bottom is connected to the driving part; the driving part includes a fan for generating negative pressure in the dust box and the ventilation cavity. The utility model discloses a base station type vacuum cleaner with a self-cleaning function. A sub-cover is provided on the dust cup cover. At the same time, a spoiler column is provided on the sub-cover. In this way, the vacuum cleaner can be cleaned in two ways, manual cleaning and automatic cleaning. 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 above-mentioned base station is also 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 when working, affecting the user experience. Utility Model Content

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

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A dual-duct vacuum cleaner self-cleaning system, the vacuum cleaner comprising a dust cup, a driving unit for generating negative pressure suction mounted on one end of the dust cup, and an openable and closable bottom cover mounted on the other end, an inlet air duct communicating with an inner cavity of the dust cup being disposed on the outer side of the dust cup, a return air duct being further disposed on the outer side of the dust cup, a vacuum motor being disposed on the inner side of the driving unit, and an air inlet of the vacuum motor being communicated with the return air duct or the inner cavity of the dust cup via an air duct switching assembly;

[0009] The cleaning system includes a base station for placing a vacuum cleaner, the interior of the base station is provided with a dust collection chamber and a central air duct that are interconnected, and the top of the base station is provided with a through hole;

[0010] 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.

[0011] 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.

[0012] Optionally, the air duct switching assembly includes a base plate connected to the bracket, a bottom hole connected to the inner cavity is opened 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, and side sealing plates for closing or connecting the air inlet and the return air duct are provided 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.

[0013] 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;

[0014] 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.

[0015] Optionally, one end of the sliding seal 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. The two ends of the first spring are respectively in contact with the inner wall of the bracket and the sliding seal plate.

[0016] Optionally, a limiting rod is fixedly installed on the inner side of the bracket, one end of the sliding seal 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.

[0017] 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.

[0018] 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.

[0019] 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 installed on the top of the bottom plate.

[0020] 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.

[0021] Beneficial effects

[0022] (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 intermediate 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 one vacuum motor, which can reduce the noise generated when the system is working and the cost of the whole machine.

[0023] (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. The side sealing plate can also be driven to rise and fall along the axis by 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

[0024] Figure 1 This is a schematic structural diagram of a dual-duct vacuum cleaner self-cleaning system according to an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the self-cleaning system of the dual-duct vacuum cleaner according to an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the position structure of the vacuum cleaner and the base station in the embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the position structure of the vacuum cleaner and the base station from another perspective in an embodiment of the utility model;

[0028] Figure 5 It is a structural schematic diagram of a vacuum cleaner in an embodiment of the present utility model;

[0029] Figure 6 This is a schematic structural diagram of an embodiment of the present utility model in which the internal air duct is in a conducting state;

[0030] Figure 7 This is a schematic structural diagram of an embodiment of the present utility model in which the internal air duct is in a closed state;

[0031] Figure 8 This is a schematic diagram of the internal structure of the air duct switching component when it is turned on in the embodiment of the present utility model;

[0032] Figure 9 This is a schematic diagram of the internal structure of the air duct switching assembly when it is closed in the embodiment of the present utility model;

[0033] 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;

[0034] 5. Dust cup; 51. Inlet air duct; 52. Bottom cover; 6. Drive unit; 61. Vacuum motor; 7. Return air duct;

[0035] 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 gasket; 10. Bracket. DETAILED DESCRIPTION

[0036] The present invention will now be described in further 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 components related to the present invention.

[0037] Example 1

[0038] like Figure 1-Figure 5As 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 outside 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 the inner cavity of the dust cup 5 at the same time.

[0039] When the inlet air duct 51, the inner cavity of the dust cup 5 and the vacuum motor 61 are connected in sequence, the internal air duct of the vacuum cleaner is formed, and the vacuum cleaner can now perform the normal dirt suction work independently; when the vacuum motor 61 is connected to the return air duct 7, the 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.

[0040] When the vacuum cleaner is used alone, its internal air duct is open and the external channel is closed, and the vacuum cleaner can perform normal dirt suction work. When the vacuum cleaner is placed in a cleaning system, its external air duct is open and the internal air duct is closed. At this time, with the assistance of the cleaning system, the vacuum cleaner can perform self-cleaning work, that is, automatically dumping the dirt and garbage accumulated in the dust cup 5.

[0041] The cleaning system includes a base station 1 for placing the vacuum cleaner. The interior of the base station 1 is provided with a dust collecting chamber 11 and a central air duct 12 that 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.

[0042] 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 through the vacuum motor 61.

[0043] 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 the 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.

[0044] Among them, a dust bag with good filtering performance can also be put into the dust collecting chamber 11, and the dirt blown into the dust collecting chamber 11 will all enter the dust collecting bag, which can be convenient for unified collection and treatment later.

[0045] 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 when the system is working and the cost of the whole machine.

[0046] Furthermore, two return air ducts 7 and two central air ducts 12 are provided, and the end of the central air duct 12 away from the through hole is connected with the dust collecting chamber 11 from the bottom. Setting two can improve the ventilation efficiency of the external air duct. 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.

[0047] In addition, a support 2 connected to the base station 1 is provided on the outside of the through hole, and the inner side surface of the support 2 corresponds to the outer contour of the dust cup 5. A second release boss 4 for releasing the bottom cover 52 is provided 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.

[0048] 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 provided at the connection, and the other end is snap-connected by a snap structure. After pressing the snap button, the bottom cover 52 is released; based on this, a second release boss 4 is provided on the support 2 at a position corresponding to the snap button. 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.

[0049] The purpose of the inner side surface corresponding to the outer side contour is to make the connection between the vacuum cleaner and the base station 1 more stably fitted; 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.

[0050] Example 2

[0051] On the basis of the first embodiment, the present invention further proposes a specific structure of the air duct switching component 8 .

[0052] like Figure 6-Figure 9As 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 two layers of cavities, 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.

[0053] 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 two layers of upper and lower cavities, and a bottom hole 82 connected to the inner cavity of the dust cup 5 is opened on the bottom plate 81. A sliding sealing plate 83 for closing or connecting the inner cavity and the air inlet is slidably installed above the bottom plate 81. 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.

[0054] Specifically, when the sliding sealing plate 83 moves horizontally, it can block or release the bottom hole 82 on the bottom plate 81 by itself, and when the side sealing plate 87 is raised or lowered longitudinally, 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.

[0055] As mentioned above, a guide column 88 parallel to its axis 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.

[0056] 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 and is embedded in 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 by the touch rod 831.

[0057] 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.

[0058] 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 in contact with the inner wall of the bracket 10 and the sliding sealing plate 83.

[0059] The release button 85 and the sliding sealing plate 83 are connected in one piece. Pressing the release button 85 can push the sliding sealing plate 83 to move; after pressing the release button 85, 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.

[0060] To ensure that the bottom hole 82 and the top hole 84 are properly aligned when the sliding seal plate 83 moves, a limiting rod 832 is fixedly mounted on the inner side of the bracket 10. A limiting groove 833 parallel to the axis of the first spring 86 is provided at one end of the sliding seal plate 83, and one end of the limiting rod 832 slides through the limiting groove 833. Multiple bottom holes 82 and top holes 84 are provided, spaced evenly apart. The distance that the limiting rod 832 moves relative to the limiting groove 833 corresponds to the distance that the sliding seal plate 83 moves relative to the bottom plate 81.

[0061] To ensure a tight seal between the bottom plate 81 and the sliding seal plate 83, a sealing gasket 9 is provided between them. The sealing gasket 9 has escape holes corresponding in position and number to the bottom holes 82, and the sealing gasket 9 is fixedly mounted on the top of the bottom plate 81. Specifically, the escape holes and the bottom holes 82 coincide with each other, and the top holes 84 and the escape holes, as well as the top holes 84 and the bottom holes 82, have the same relative positions.

[0062] 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 .

[0063] The buckle button and the release button 85 are in the same longitudinal direction of the outside of the dust cup 5. When placing the vacuum cleaner 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 it passes through the through hole and enters the dust collecting chamber 11; then the vacuum cleaner is placed upright, and the release button 85 is just in contact with 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.

[0064] 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 the open state, the side sealing plate 87 is in the closed state, the bottom cover 52 of the dust cup 5 is closed, and the vacuum motor 61 is working. At this time, the interior 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;

[0065] When the handheld vacuum cleaner is placed in the base station 1, the release button 85 and the buckle button of the sliding cover 83 and the bottom cover 52 are triggered, causing the sliding cover 83 to close and the linked side cover 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 takes away the dirt and dust inside the dust cup 5 when passing through it. If a dust collecting bag is installed in the dust collecting chamber 11, the air with dust and dirt will eventually be sucked into the dust collecting bag of the base station 1, and the dirt and dust will remain 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.

[0066] To sum up, the utility model 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 dust suction 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 side sealing plate 87 of the air duct switching component 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.

[0067] 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. 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.

[0068] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0069] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but 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 an inlet air duct (51) being provided on the outer side of the dust cup (5) and communicating with the inner cavity thereof, characterized in that: A return air duct (7) is further provided on the outside of the dust cup (5), a vacuum motor (61) is provided on the inside of the driving portion (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 assembly (8); The cleaning system comprises a base station (1) for placing a vacuum cleaner, wherein the interior of the base station (1) is provided with a dust collecting chamber (11) and a central air duct (12) that 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.

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) being mounted on one end of the dust cup (5) close to the driving part (6), and the air duct switching assembly (8) being located inside 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) includes a bottom plate (81) connected to the bracket (10), a bottom hole (82) communicating with the inner cavity is provided on the bottom plate (81), 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 provided 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).

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 provided 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), 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 grooves (89); wherein the bottom plate (81) and the sliding sealing plate (83) are both arranged at an angle.

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). 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 installed 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 provided on the outside of the through hole, a second release boss (4) for releasing the bottom cover (52) is provided on the inside of the support (2), 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).

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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