A cleaning device with dust suction, self-cleaning and dust collection

Abstract

The application discloses a cleaning device with dust suction, self-cleaning and dust collection, comprising a dust collector main body and a base station, the cleaning device has a dust suction mode and a positive pressure self-dust collection mode, the positive pressure self-dust collection mode comprises two modes of self-cleaning and dust collection, and power sources of the dust suction mode and the positive pressure self-dust collection mode are from the same fan assembly; the dust collector main body can automatically realize switching from the dust suction mode to the positive pressure self-dust collection mode when being placed on the base station, and the switching of the dust suction mode and the positive pressure self-dust collection mode is realized by switching of at least one air duct in an air inlet air duct and an air outlet air duct. On the one hand, the cost is lower, and the weight of the whole device is lighter; on the other hand, positive pressure blowing is adopted in the self-cleaning and dust collection mode, and compared with negative pressure suction, the self-cleaning and dust collection effect is better; on the other hand, the self-dust collection mode is realized without manual operation, and the operation is simpler.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and specifically to a cleaning device with dust suction, self-cleaning and dust collection functions. Background Technology

[0002] Handheld vacuum cleaners are increasingly popular in households due to their compact size, portability, and lack of power cord constraints. Handheld vacuum cleaners typically use a fan to generate negative pressure, sucking up debris and other impurities into a dustbin for collection. The dustbin has a small capacity, and the dustbin needs to be opened to empty it after use, but this process scatters dust and causes secondary pollution. To address these issues, base stations with dust collection functions have emerged on the market. These stations collect dust from the dustbin, preventing it from being scattered. For example, Chinese patent document CN218651617U discloses a vacuum cleaner base station dust collection system, including a base station and a vacuum cleaner. The base station's base contains a dust collection bag and a negative pressure component. When the vacuum cleaner is placed on the base station and the dustbin's bottom cover is opened, the negative pressure component draws in suction, creating negative pressure inside the collection chamber. The dust inside the dustbin automatically falls and is collected into the base station, achieving self-collection of dust. This conventional cleaning solution typically uses two suction devices in the entire cleaning kit. One is located inside the vacuum cleaner to create negative pressure in the dust cup during vacuuming mode, and the other is located in the base station to create negative pressure in the dust collection chamber for dust collection. This approach is costly, and because the airflow passes through a long suction channel at the front, airflow loss is significant, resulting in a smaller overall effective airflow and poor dust collection. Furthermore, the entire cleaning kit is heavy, making it difficult for customers to move. In addition, vacuum cleaners usually have a dust particle separation filter, such as a conventional cyclone filter. As a core component of the vacuum cleaner, this filter accumulates a lot of dust and debris after frequent use, leading to decreased filtration efficiency. Cleaning is necessary to improve its effectiveness, but cleaning has always been a major challenge for consumers. To address this issue, various filter self-cleaning solutions are available on the market, broadly categorized into contact and non-contact cleaning structures. Contact cleaning methods involve scrapers, brushes, or blades that directly act on the filter screen. Non-contact methods include tapping vibration or negative pressure suction. Contact cleaning typically operates simultaneously with the vacuum cleaner's startup, preventing users from selecting the self-cleaning time. It also generates significant noise, impacting the user experience, and the cleaning effect is often poor. Harder cleaning components like scrapers can easily damage the filter screen during cleaning, affecting its filtration efficiency or even causing it to fail. Non-contact solutions are more commonly used in existing vacuum cleaners. For example, Chinese Patent Publication No. CN116019386A discloses a filter self-cleaning device and vacuum cleaner. The filter self-cleaning device includes a housing, power source, transmission components, cam, tapping element, and elastic reset element.The striking element includes a contact part and a striking part. The contact part contacts a cam, and the striking part is used to strike the object connected to the filter. The striking element causes the filter to vibrate, causing dust to be separated from the filter screen, thus achieving the purpose of cleaning the filter. However, in this solution, on the one hand, the structure of the filter self-cleaning device is very complex and the design cost is high; on the other hand, the striking element can only clean the filter screen and cannot clean the dust adhering to the inner wall of the dust cup. In the negative pressure suction solution, on the one hand, it also requires an additional suction device, resulting in high cost; on the other hand, because the suction airflow needs to pass through a long suction channel at the front end, the air volume loss is large, and the actual air volume entering the dust cup to backwash the filter screen is small, resulting in poor self-cleaning effect of the filter. Therefore, in order to solve the above problems, this invention is hereby developed. Summary of the Invention

[0003] In view of at least one of the above-mentioned technical problems, the present invention aims to provide a cleaning device with dust suction, self-cleaning and dust collection functions.

[0004] The technical solution of the present invention is as follows: The purpose of the present invention is to provide a cleaning device with vacuuming, self-cleaning and dust collection, including a vacuum cleaner body and a base station. The cleaning device has a vacuuming mode and a positive pressure self-collecting mode. The positive pressure self-collecting mode includes two modes: self-cleaning and dust collection. The power source for both the vacuuming mode and the positive pressure self-collecting mode comes from the same fan assembly.

[0005] The vacuum cleaner body, when placed on the base station, can automatically switch from vacuuming mode to positive pressure self-collecting mode. The switching between vacuuming mode and positive pressure self-collecting mode is achieved by switching at least one of the air inlet duct and air outlet duct.

[0006] Compared with the prior art, the advantages of the present invention are: the cleaning device of the present invention with dust suction, self-cleaning and dust collection is lower in cost and lighter in weight; the positive pressure blowing is used for dust collection and self-cleaning, which has better self-cleaning and dust collection effects than negative pressure suction; and the self-dust collection mode does not require manual operation, making it simpler to operate. Attached Figure Description

[0007] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0008] Figure 1 This is a three-dimensional structural diagram of a cleaning device with dust suction, self-cleaning and dust collection functions according to an embodiment of the present invention;

[0009] Figure 2 This is a schematic diagram of the structure of a cleaning device with suction, self-cleaning and dust collection functions according to an embodiment of the present invention, showing the base station facing forward and the brush head assembly facing backward.

[0010] Figure 3 This is an exploded structural diagram of the dust cup assembly and fan assembly of a cleaning device with dust suction, self-cleaning and dust collection functions according to an embodiment of the present invention.

[0011] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0012] Figure 5 for Figure 3 Enlarged view of part B in the middle;

[0013] Figure 6 This is a schematic diagram of the structure of the filter assembly of a cleaning device with dust suction, self-cleaning and dust collection according to an embodiment of the present invention (where 6(a) is the front view, 6(b) is the bottom-up perspective view, and 6(c) is the bottom view).

[0014] Figure 7 This is a cross-sectional structural diagram of the filter assembly of a cleaning device with vacuuming, self-cleaning, and dust collection functions according to an embodiment of the present invention (arrows indicate the airflow direction in vacuuming mode and positive pressure self-collection mode).

[0015] Figure 8 This is a schematic diagram of the structure of the HEPA component in the filter assembly of a cleaning device with dust collection, self-cleaning and dust collection functions according to an embodiment of the present invention (where 8(a) is the front view, 8(b) is the perspective view with the bottom facing upward, and 8(c) is the bottom view).

[0016] Figure 9 This is a three-dimensional structural schematic diagram of the fan assembly of a cleaning device with dust suction, self-cleaning and dust collection according to an embodiment of the present invention (where 9(a) is a schematic diagram with the front cover facing forward and 9(b) is a schematic diagram with the rear cover facing forward).

[0017] Figure 10 This is a schematic diagram of the fan bracket of a cleaning device with dust suction, self-cleaning and dust collection according to an embodiment of the present invention (where 10(a) is a perspective view, 10(b) is a top view and 10(c) is a side view).

[0018] Figure 11 This is a cross-sectional structural diagram of the main body (excluding the brush head assembly) of a cleaning device with suction, self-cleaning and dust collection functions according to an embodiment of the present invention in suction mode.

[0019] Figure 12 for Figure 11 Enlarged view of a section in the middle C;

[0020] Figure 13 This is a cross-sectional structural diagram of a cleaning device (excluding brush head assembly) with suction, self-cleaning and dust collection functions according to an embodiment of the present invention in positive pressure self-dust collection mode.

[0021] Figure 14 for Figure 13 A magnified view of part D in the image;

[0022] Figure 15 This is a cross-sectional structural diagram of a base station (excluding the support body) of a cleaning device with dust suction, self-cleaning and dust collection functions according to an embodiment of the present invention.

[0023] Figure 16 This is a cross-sectional structural diagram of a base station (including a support body) of a cleaning device with dust suction, self-cleaning and dust collection functions according to an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0025] An embodiment of the present invention provides a cleaning device with dust suction, self-cleaning, and dust collection functions, see [link to relevant documentation]. Figures 1 to 16The system includes a vacuum cleaner body and a base station 40, with the base station 40 used for dust collection. The cleaning device has a vacuuming mode and a positive pressure self-collecting mode, both powered by the same fan assembly 20. The positive pressure self-collecting mode refers to a positive pressure within the dust cup body 31 of the dust cup assembly 30 during dust collection, rather than the conventional negative pressure. The vacuum cleaner body, when placed on the base station 40, can automatically switch between the vacuuming mode and the positive pressure self-collecting mode. This switching is achieved by switching at least one of the air inlet and outlet ducts. It should be noted that the positive pressure self-collecting dust mode in this embodiment of the invention includes two modes: self-cleaning and dust collection. Self-cleaning refers to the dust cup assembly 30, while dust collection refers to the process of introducing dust and other debris from the dust cup assembly 30 into the base station 40, while simultaneously introducing dust and other debris generated during the self-cleaning process of the dust cup assembly 30 into the base station 40. The air duct is the same in both self-cleaning and dust collection modes, and self-cleaning occurs during the dust collection process. Therefore, the two modes are summarized as a positive pressure self-collecting dust mode. In the cleaning device implemented by this invention, the vacuum cleaner body can be used independently for vacuuming, or it can be placed on the base station 40 for self-cleaning and dust collection. Moreover, dust collection and self-cleaning are automatically achieved when the vacuum cleaner body is placed on the base station 40. In other words, the triggering of dust collection and self-cleaning is initiated by the vacuum cleaner body being placed on the base station 40, without requiring additional operation of the base station 40 or the vacuum cleaner body to activate dust collection and self-cleaning. More specifically, a single fan assembly 20 is shared for both vacuuming and self-collecting modes. Placing the vacuum cleaner body on the base station 40 triggers a switch in at least one of the air inlet or outlet ducts, thereby switching between vacuuming mode and positive pressure self-collecting mode. It should be noted that in the positive pressure self-collecting mode, "positive pressure" refers to the air pressure inside the dust cup being greater than the air pressure inside the base station 40 or greater than the air pressure outside the dust cup. Similarly, in vacuuming mode, "negative pressure" refers to the air pressure inside the dust cup being less than the air pressure outside the dust cup. Compared to existing technologies that add additional suction devices or other negative pressure devices to the base station 40, the cleaning device of this invention is lower in cost and lighter in weight. Furthermore, the positive pressure blowing for dust collection and self-cleaning provides better self-cleaning and dust collection effects compared to negative pressure suction. Additionally, the self-collecting mode requires no manual operation, making it simpler to use.

[0026] According to some preferred embodiments of the present invention, after the vacuum cleaner body is removed from the base station 40, the air duct automatically switches back to the air duct of the vacuuming mode. That is, the switch from dust collection mode to vacuuming mode is achieved by separating the vacuum cleaner body from the base station 40. After the vacuum cleaner body is removed from the base station 40, the air duct automatically resets to the air duct of the vacuuming mode used when the vacuum cleaner body is used alone, without requiring additional user operation to switch the air duct, making operation simpler. It should be noted that technical solutions that achieve the switch from dust collection mode to vacuuming mode through manual operation are also within the scope of protection of the present invention. For example, the air duct switching is controlled by a button, push button, or knob located on the outer wall of the dust cup assembly 30. Automatic switching can be achieved when the vacuum cleaner body is placed on the base station 40, but after the vacuum cleaner body is removed from the base station 40, the air duct reset and switching cannot be achieved automatically and requires manual operation of the button, push button, or knob.

[0027] Some preferred embodiments of the present invention, such as Figures 1 to 14 As shown, the vacuum cleaner body includes a body assembly 10, a fan assembly 20 mounted on the body assembly 10, and a dust cup assembly 30. The dust cup assembly 30 includes a dust cup body 31 and a filter assembly 32 disposed within the dust cup body 31. The body assembly 10 has an air inlet channel 11 that communicates with the dust cup assembly 30 in vacuuming mode and closes in positive pressure self-collection mode. The air inlet channel 11 is used to connect an extension duct (not shown) to a brush head assembly 50, such as a conventional roller brush or floor brush assembly. The body assembly 10 includes a main body with an air inlet channel 11, a vacuum exhaust port 12, and a dust blowing air inlet 13. The main body has a handle structure (not shown), and the main body has a mounting cavity (not shown) for mounting the fan assembly 20. The mounting cavity also contains a fan bracket 14 for mounting the fan assembly 20. Figure 3 and Figure 10As shown in (10a), the fan bracket 14 is inverted U-shaped. The position or angle of the fan assembly 20 and one of the fan brackets 14 relative to the body assembly 10 or the dust cup assembly 30 changes in the dust collection mode and the positive pressure self-collecting mode, so that the fan assembly 20 and the fan bracket 14 are connected in a switchable air duct manner. Specifically, the fan assembly 20 has at least one air inlet and at least one air outlet, and the fan bracket 14 also has at least one air inlet and at least one air outlet. As an exemplary embodiment, for example, in the dust collection mode, one air inlet on the fan bracket 14 is connected to one air inlet on the fan assembly 20, and one air outlet on the fan assembly 20 is connected to one air outlet on the fan bracket 14 to form an air duct, which is connected to the dust collection exhaust port 12 to discharge the gas in the dust collection mode outside the vacuum cleaner body. The other air inlets and outlets on the fan assembly 20 and the fan bracket 14 are closed or blocked, preventing air from entering or leaving. In the positive pressure self-dust collection mode, the air inlets and outlets that are closed or blocked in the dust collection mode are connected to the dust blowing inlet 13 to blow the gas entering the dust blowing inlet 13 into the dust cup assembly 30 under positive pressure. The air inlets and outlets that are connected in the dust collection mode are closed or blocked, preventing air from entering or leaving. In other words, the air duct changes between vacuuming mode and positive pressure self-collecting mode; it is not fixed. More specifically, for example... Figure 9 As shown, the fan assembly 20 has a first air inlet 221, a first air outlet 222, and a first air outlet 231. Preferably, as shown... Figure 3 As shown, the fan assembly 20 of this embodiment includes a fan body 21 and a front cover 22 and a rear cover 23 covering the fan body 21. A first air inlet 221 and a first air outlet 222 are formed on the front cover 22, and a first air outlet 231 is formed on the rear cover 23. Figure 10As shown, the fan bracket 14 has a second air inlet 141, a second air outlet 142, and a third air inlet 143. Preferably, the second air inlet 141, the second air outlet 142, and the third air inlet 143 are arranged sequentially and at intervals along the arc direction of rotation of the fan assembly 20 on the fan bracket 14. In dust collection mode, the second air inlet 141, the first air inlet 221, and the first air outlet 231 are sequentially connected; in positive pressure self-dust collection mode, the third air inlet 143, the first air inlet 221, the first air outlet 222, and the second air outlet 142 are sequentially connected. As an alternative embodiment, the fan assembly 20 has a first air inlet 221 and a first air outlet 222. The fan bracket 14 has a second air inlet 141, a second air outlet 142, and a third air inlet 143. In vacuuming mode, the second air inlet 141, the first air inlet 221, and the first air outlet 222 are sequentially connected; in positive pressure self-dust collection mode, the third air inlet 143, the first air inlet 221, the first air outlet 222, and the second air outlet 142 are sequentially connected. That is to say, the first air outlet 231 is not opened on the fan assembly 20. At this time, it is only necessary to adjust the position of the vacuum exhaust port 12, which is used as exhaust in vacuuming mode, on the body assembly 10.

[0028] Some preferred embodiments of the present invention, such as Figure 3 and Figures 6 to 8 As shown, the dust cup assembly 30 includes a dust cup body 31, a filter assembly 32 disposed within the dust cup body 31, a bottom cover plate 33 disposed at the bottom of the dust cup body 31, and a movable cover plate 34 movably connected, for example, hinged to an opening on the bottom cover plate 33. Preferably, it also includes a sealing element, such as a sealing ring 36, disposed on the opening of the bottom cover plate 33 for sealing the movable cover plate 33. It should be noted that a locking element 35 is provided inside the bottom cover plate 33, which is used to lock the movable cover plate 34 in the natural state, i.e., when not in operation, and in the dust collection mode. In order to enable the movable cover plate 34 to open automatically in the positive pressure self-collecting mode so that the interior of the dust cup body 31 and the interior of the base station 40 can be connected, such as... Figure 15 As shown, a first trigger 45 for triggering the unlocking of the locking element 35 is preferably provided on the base station 40. As an alternative embodiment, the first trigger 45 can also be directly provided on the outer wall of the dust cup body 31. The specific structure of the locking element 35 is not described in detail or limited, and can be any conventional locking element 35. As an exemplary embodiment, such as Figure 3 and Figures 11 to 12As shown, the locking element 35 includes a locking body and a biasing element 351. In the installed state, the biasing element 351 applies a biasing force to the locking body in the center direction toward the opening of the bottom cover plate 33, so that the locking element 35 can lock the movable cover plate 34 covering the opening of the bottom cover plate 33. The side of the locking body facing the opening of the bottom cover plate 33 has a hook portion 353, and the end connected to the biasing element 351 has a barb portion (inverted triangle). When the movable cover plate 34 is closed, the hook portion 353 can hook onto the protruding cover edge 341 (matching the hook portion 353) on the inner end face of the movable cover plate 34 under the biasing force of the biasing element 351. The bottom cover 33 also has a first insertion hole (not shown) for the insertion of the first trigger 45. When the vacuum cleaner body is placed on the base station 40, the first trigger 45 is inserted into the first insertion hole and pushes the barb of the locking body so that the locking body can move upward a certain distance so that the hook part 353 separates from the cover edge 341. Then, due to the action of the inclined surface on the barb part, the locking body will move towards the center of the opening away from the bottom cover 33 and overcome the bias force of the biasing member 351 so that the hook part 353 is completely separated from the movable cover 34. Finally, the movable cover 34 is opened under the positive pressure in the dust cup body 31. Preferably, the locking member 35 also includes a locking unlocking push rod 352 that is movably connected to the bottom cover 33 along the axial direction of the dust cup body 31 and protrudes outside the first insertion hole of the bottom cover 33 or is flush with the bottom end of the first insertion hole when the movable cover 34 is closed in the vacuuming mode. Figure 3 and Figures 11 to 12 As shown, the top of the latch unlocking push rod 352 is inverted triangular. When the latch unlocking push rod 352 is subjected to the upward pushing force of the first trigger member 45, it pushes the barb part of the latch body. Specifically, when the vacuum cleaner body is placed on the base station 40, the latch unlocking push rod 352 is pushed upward along the first insertion hole by the upward pushing force of the first trigger member 45, thereby unlocking the latch member 35 so that the movable cover 34 can be opened under positive pressure. For the first trigger member 45, it is preferably a key-like component such as an upwardly protruding push rod provided on the top cover of the base station 40. It should be noted that a support frame 15 is provided on the side of the dust cup body 31 facing the fan assembly 20. The support frame 15 is used to support the fan assembly 20 and the filter assembly 32, and the support frame 15 has multiple through holes so that the airflow in the dust cup assembly 30 can enter the air inlet of the fan assembly 20 through the through holes in the dust suction mode. Similarly, in the positive pressure self-dust collection mode, the airflow blown out of the air outlet of the fan assembly 20 can enter the dust cup assembly 30 through the through holes.

[0029] The switching between vacuuming mode and self-collecting mode can be achieved as follows: Figure 13 and Figure 14The fan assembly 20 is shown rotating relative to the body assembly 10. As an alternative embodiment, the fan bracket 14 can rotate relative to the body assembly 10 or the dust cup assembly 30, while the fan assembly 20 remains fixed. As a modified embodiment, the fan assembly 20 can be fixed, while the fan bracket 14 translates relative to the body assembly 10. The specific structure is not particularly limited or described; please refer to the structure of the switching component in the applicant's previous multi-purpose pet vacuum cleaner patent. As another alternative embodiment, the fan bracket 14 is fixed, and the fan assembly 20 achieves airflow switching by translation. The specific structure is also not described in detail; please refer to the structure of the switching component in the applicant's previous multi-purpose pet vacuum cleaner patent. In this embodiment of the invention, airflow switching is preferably achieved by rotating the fan assembly 20 and the fan bracket 14, that is, the angle of the fan assembly 20 relative to the body assembly 10 or the dust cup assembly 30 changes in vacuuming mode and positive pressure self-collecting mode. To enable automatic airflow switching when the vacuum cleaner body is placed on and removed from the base station 40, a pushing component linked to the fan assembly 20 is provided on the body assembly 10. The base station 40 is provided with a second trigger 46 for triggering the pushing component to rotate the fan assembly 20 when the vacuum cleaner body is placed on the base station 40, thus achieving automatic airflow switching. (Preferred embodiment, such as...) Figures 3 to 5 and Figures 11 to 14 As shown, the pushing assembly includes a first pushing assembly 37 and a second pushing assembly. The first pushing assembly 37 is movably disposed within the dust cup body 31, and the bottom cover plate 33 has a second insertion hole 332 or socket for the second trigger 46 to push the first pushing assembly 37 upward. The second pushing assembly is movably disposed on the fan bracket 14 and connected to the fan assembly 20, specifically as follows: Figure 5 The pivot shown. More specifically, as... Figure 3As shown, the first pushing assembly 37 includes a first pushing member 371, such as a push rod or push plate, movably disposed within the dust cup body 31 and extending along the axial direction of the dust cup body 31, and a first elastic reset member 372, one end of which is connected to the dust cup body 31 and the other end of which is connected to the first pushing member 371. The second pushing assembly includes a second pushing member 16, such as a push rod or push plate, movably disposed on the fan bracket 14 with one end free and the other end pivotally connected to the outer wall of the fan assembly 20, and a second elastic reset member 160, one end of which is connected to the second pushing member 16 and the other end of which is connected to the fan bracket 14. The first elastic reset member 372 and the second elastic reset member 160 are conventional components such as tension springs. It should be noted that in this embodiment, the first pushing member 371 and the second pushing member 16 are independent, that is, they are not connected together. They only come into contact or abut each other when the vacuum cleaner body is placed on the base station 40 and is triggered to switch the air duct. In order for the first pushing member 371 to trigger the second pushing member 16 during displacement after being triggered by the second trigger member 46, the second pushing member 16 should be on the path of the displacement of the first pushing member 371. The second trigger member 46 is a conventional push rod or other component. In this embodiment of the invention, when the vacuum cleaner body is placed on the base station 40, the second trigger member 46 pushes the first pushing component 37 upward. The first pushing component 37 moves upward and pushes the second pushing component. The second pushing component also moves upward and rotates around the pivot axis between the second pushing member 16 and the fan component 20, thereby driving the fan component 20 to rotate and realize the air duct switching. Preferably, the second pushing member 16 is a flat plate, and an upwardly curved first hook 161 for connecting the second elastic reset member 160 is provided on the side wall of the second pushing member 16 facing away from the fan assembly 20. Correspondingly, a downwardly curved second hook 144 is provided on the fan bracket 14 for connecting the other end of the second elastic reset member 160. Preferably, the first pushing member 371 is a push rod or push plate, such as... Figure 3 and Figure 4 As shown, the first pusher 371 has a first connecting part 3711 for one end of the first elastic reset member to be connected, specifically for hooking, and the bottom cover plate 33 has a second connecting part 331 for the other end of the first elastic reset member to be hooked. Both the first connecting part 3711 and the second connecting part 331 shown in the figure are connecting holes. The first connecting part 3711 and the second connecting part 331 can also be hook-like structures. As an alternative embodiment, the first pusher 371 and the second pusher 16 are connected together to form a linkage structure, that is, the push assembly can also be a linkage linkage assembly. In this case, it is not necessary to set multiple elastic reset members such as tension springs; only one elastic reset member such as a tension spring is needed. It should be noted that the linkage assembly can be just one linkage or multiple linkages. As another alternative embodiment, the push assembly can also be a meshing transmission assembly such as a rack and pinion transmission structure. It should be noted that, as Figures 11 to 14 As shown, the second pusher 16 is positioned at the dust inlet 13. In the dust suction mode, the second pusher 16 blocks the dust inlet 13, and the air in the dust suction mode is discharged from the dust suction exhaust port 12. In the positive pressure self-dust collection mode, the second pusher 16 moves upward to open the dust inlet 13.

[0030] According to some preferred embodiments of the present invention, after the vacuum cleaner body is placed on the base station 40, the air duct switches from a suction air duct to a self-collecting air duct, and the fan body 21 automatically starts. The automatic start-up of the fan body 21, its automatic shutdown after completing self-cleaning and dust collection operations, and subsequent charging are all achieved through a micro switch (not shown). The micro switch and the fan body 21 can be electrically connected through a control module, such as a control circuit. The micro switch is located on the fan assembly 20 or the push assembly, or at the connection point of both. The micro switch is a conventional micro switch in the prior art. When the fan assembly 20 rotates to switch the air duct into position, the micro switch is triggered by the squeezing force of the push assembly or the fan assembly 20, thereby activating the circuit of the fan assembly 20. The base station 40 also has a charging interface for charging the vacuum cleaner body. Correspondingly, the vacuum cleaner body has a charging port. When the vacuum cleaner body is placed on the base station 40, the charging interface and the charging port are electrically connected. Preferably, the vacuum cleaner body does not immediately execute the charging program. Instead, it first triggers the self-cleaning and dust collection program via a microswitch and performs self-cleaning and dust collection operations for a preset time, such as 1-20 seconds. After the preset time is reached, the fan body 21 is turned off, for example, by setting a timing circuit (the control device has a logic circuit that determines whether the self-cleaning and dust collection time has reached the self-cleaning and dust collection time set by the timing circuit; this logic circuit and timing circuit are conventional control circuits, which are easily known and implemented by those skilled in the art) to turn off the fan assembly 20 after the preset time. The control device then controls the vacuum cleaner body to switch to the charging program. The cleaning device of this embodiment of the invention can switch between self-cleaning and charging by setting a microswitch, eliminating the need for manual operation of self-cleaning and charging, making operation simple.

[0031] In some preferred embodiments of the present invention, the power source for both the vacuuming mode and the positive pressure self-collecting mode is the same, namely a battery pack or a power supply. For example, a battery pack (not shown) or a power supply (not shown) can be integrated into the body assembly 10. The power for the suction operation of the fan assembly 20 in the vacuuming mode is provided by the battery pack or power supply. Unlike the prior art where a suction device or negative pressure device is added to the base station 40 for dust collection, requiring separate power sources for the vacuum cleaner body and base station 40 to perform vacuuming and dust collection functions respectively, thus increasing operating costs, the present invention uses a single power source for both the vacuuming mode and the self-collecting mode, resulting in lower manufacturing and operating costs.

[0032] In some preferred embodiments of the present invention, to achieve better self-cleaning effect, the filter component 32 is also improved. Specifically, as shown in the embodiments of the present invention... Figures 6 to 8 As shown, the filter assembly 32 includes a cyclone separator 321 and a HEPA filter assembly 322 disposed in the middle of the cyclone separator 321. The cyclone separator 321 includes a filter support 3211 and a filter screen 3212 mounted on the filter support 3211. The filter support 3211 has a cavity in the middle to facilitate the installation of the HEPA filter assembly 322. The description and explanation will focus on the use of the filter support 3211, specifically the direction from near the fan assembly 20 to near the movable cover 34. Figure 6 As shown in (6a), from top to bottom, the filter support 3211 includes a first section, a second section, and a third section, wherein the outer diameter of the first section is larger than the outer diameters of the second and third sections, that is, the filter support 3211 is thicker at the top and thinner at the bottom. More specifically, the outer wall surface of the first section protrudes radially outward to form a downwardly spiraling air guide structure 32111. In this embodiment of the invention, the spiral air guide structure 32111 is preferably as follows: Figure 7 The spiral air guide groove shown, specifically, the spiral air guide structure 32111 includes the spiral air guide groove along the axial direction, that is, as shown in the figure. Figure 7 The diagram shows a guide wall 321111 spirally extending downwards from the top of the first section and a baffle wall 321112 extending axially on the outer side of the guide wall 321111. The top of the first section has an opening for placing and fixing the HEPA assembly 322. The second section is provided with a filter screen 3212, and the third section is inverted conical in shape. Preferably, the third section specifically has a blowing dust-blocking structure 3214 at the end facing the movable cover 34 in the installed state, which is closed in dust suction mode and open in positive pressure self-collecting dust mode. The spiral air guide structure 32111, i.e., the spiral air guide groove, specifically has several through first air outlet holes 32112 on the guide wall 321111, and the lower end outlet of the spiral air guide groove extends to meet the outer side of the filter screen 3212. The filter bracket 3211, in its installed state, is further provided with an air inlet dust blocking structure 3213 at the air outlet position facing the air inlet channel 11. This structure opens in vacuuming mode to connect the air inlet channel 11 and the dust cup body 31, and closes in positive pressure self-collecting mode to cut off the air inlet channel and the dust cup body 31. Preferably, the air inlet dust blocking structure is rotatably mounted on the top side wall of the first section of the filter bracket 3211, and after the air inlet channel 11 is opened, it flips to block the inlet of the spiral air guide groove. That is to say, in vacuuming mode, the airflow entering the dust cup body 31 from the air inlet channel 11 will not enter the spiral air guide groove, but will only spiral downwards along the outer wall of the spiral air guide groove to form a spiral airflow. For the HEPA component 322, such as Figure 8As shown, the HEPA assembly 322 includes a HEPA frame 3221, a HEPA body 3222, and a HEPA bottom cover 3223. The HEPA frame 3221 has several second air outlets 32211. During installation, the HEPA frame 3221 covers the top opening of the first section of the filter support 3211, and the first air outlets 32112 and the second air outlets 32211 correspond. This correspondence means that their projections on the same horizontal plane, i.e., along the axial direction of the filter assembly 32, at least partially overlap; they can be completely overlapped or partially overlapped. This is a preferred embodiment of the invention, such as... Figure 8 As shown in (8b) and (8c), there are two sets of second air outlets 32211 on the HEPA frame 3221. The two sets of second air outlets 32211 are concentric but have different radii. That is, the HEPA frame 3221 is provided with two rings of second air outlets 32211, one inner and one outer. Each ring of second air outlets 32211 is preferably composed of multiple circumferentially spaced arc-shaped air holes. The second air outlets 32211 of the inner ring correspond to the gap between the outer wall of the HEPA body 3222 and the inner wall of the filter bracket 3211, and the second air outlets 32211 of the outer ring correspond to the first air outlet 32112. The HEPA body 3222 is mounted on the HEPA frame 3221 and has several pleats 32221. An airflow channel 32222 is formed between any two adjacent pleats 32221 along the axial direction of the cyclone separator 321. The HEPA bottom cover 3223 is located at the end of the HEPA body 3222 away from the HEPA frame 3221, and the HEPA bottom cover 3223 has an avoidance notch 32231 at any airflow channel 32222. That is to say, the vacuuming mode and In positive pressure self-collection mode, the airflow through the airflow channel 32222 is unobstructed, and the airflow direction inside the filter bracket 3211 is opposite in both modes. Taking the airflow direction inside the filter bracket 3211 in the vacuuming mode as positive, the airflow inside the filter bracket 3211 in the self-collection mode is reversed. That is, in the self-collection mode, the airflow blows in the opposite direction against the inner wall of the filter bracket 3211 and the outer wall of the HEPA body 3222, and against the inner wall of the dust cup body. In the cleaning device of this embodiment, in the vacuuming mode, the airflow can directly enter the airflow channel 32222 through the clearance notch 32231 for secondary filtration. In the self-collection mode, specifically the self-cleaning mode, the airflow blows against the HEPA body 3222 through the airflow channel 32222 and then exits through the clearance notch 32231 through the bottom opening of the filter bracket 3211. Moreover, the setting of the clearance notch 32231 can also ensure that there is no dust remaining in dead corners during the self-cleaning operation, which can greatly improve the self-cleaning efficiency of the filter. Specifically, such as Figure 8As shown in (8b), the HEPA body 3222 is an inverted cone shape, thicker at the top and thinner at the bottom, and the HEPA bottom cover 3223 is a polygon with multiple corners. In an alternative embodiment, the HEPA bottom cover 3223 of the HEPA assembly 322 does not have a clearance notch 32231. In another alternative embodiment, the HEPA body 3222 can also be arranged in a conventional sheet-like configuration, that is, one or more sheet-like HEPA units can be arranged side-by-side or in an array at the bottom of the HEPA frame 3221. Each sheet-like HEPA body 3222 also has multiple folds 32221. The HEPA body is formed by repeatedly folding a sheet or plate-like HEPA unit in reverse, and each fold 32221 is shaped like... Figure 9The triangle shape is shown. In this embodiment of the invention, in the dust collection mode, the air inlet dust barrier structure 3213 is open, and the air blowing dust barrier structure 3214 is closed. The airflow containing dust and debris drawn in from the air inlet channel 11 enters the dust cup body 31 and is filtered once by the filter screen 3212 along the spiral air guide structure 32111. The dust particles fall directly, and the airflow enters the filter bracket 3211 and is filtered a second time by the HEPA body. After that, it enters the fan assembly 20 through the top opening of the HEPA body along the airflow channel 32222 and is finally discharged through the dust collection exhaust port 12. In the positive pressure self-collecting dust mode, the air inlet dust barrier structure 3213... When the airflow is closed and the dust-blocking structure 3214 is open, the airflow entering through the dust inlet 13 passes through the fan assembly 20 and the second outlet 32211, and is entirely blown into the space between the outer wall of the filter bracket 3211 and the inner wall of the dust cup body 31. Alternatively, some airflow may be blown into the space between the inner wall of the filter bracket 3211 and the outer wall of the HEPA body 3222, and some into the space between the outer wall of the filter bracket 3211 and the inner wall of the dust cup body 31. Finally, the airflow enters the base station 40 through the opening at the bottom of the dust cup body 31, achieving self-dust collection and self-cleaning of the filter assembly 32 and the inner wall of the dust cup body 31. It should be noted that in the self-dust collection mode, some airflow exits through the first outlet 32112 and also forms a spiral airflow around the outer wall of the spiral air guide structure 32111. This part of the airflow has the same spiral direction as the airflow entering the dust cup body 31 from the air inlet channel 11 in the dust suction mode, which can achieve self-cleaning of the outer wall of the cyclone separator 321 and the inner wall of the dust cup body 31. In addition, part of the airflow passing through the first air outlet 32112 spirals downward along the guide wall 321111 to self-clean the inner wall of the filter screen 3212, and another part of the airflow enters between the inner wall of the filter support 3211 and the outer wall of the HEPA body 3222 through the second air outlet 32211. The direction of this part of the airflow is consistent with the fold line between two adjacent folds 32221 of the HEPA body 3222, so as to clean the outer wall of the HEPA body 3222. The cleaning device of this embodiment of the invention, through the improved structure of the filter component 32, although the airflow of the filter component 32 in the self-dust collection mode is reversed like that of existing suction self-cleaning cleaning devices, the cleaning device of this embodiment of the invention, through the structural design and the adoption of a positive pressure self-cleaning method, can not only achieve self-cleaning of the outer wall of the cyclone separator 321 and the outer wall of the HEPA body 3222, but also achieve self-cleaning of the inner wall of the dust cup. Moreover, the blowing air during self-cleaning is provided by the fan component 20 above the dust cup component 30. Compared with the prior art of setting a suction device or other negative pressure device in the base station 40, the distance to the dust cup component 30 is shorter, the wind loss is smaller, the self-cleaning airflow is stronger, and the self-cleaning effect is naturally better. As for the blowing dust-blocking structure 3214, it is a dust-blocking sheet made of conventional soft material, such as a rubber sheet with a cross-cut in the middle.As an alternative embodiment, the blowing dust-blocking structure 3214 can also be a conventional one-way valve, where the air can only flow in one direction. That is, in the dust suction mode, the air cannot enter the filter bracket 3211 from bottom to top. However, in the positive pressure self-collecting dust mode, the airflow can be discharged from the filter bracket 3211 into the dust cup and then introduced into the base station 40. As another alternative embodiment, the blowing dust-blocking structure 3214 can be omitted. Instead, an opening can be made at the bottom of the third section of the filter bracket 3211, and the opening can extend directly to contact the inner surface of the movable cover plate 34, rather than being fixed. In vacuum mode, due to the negative pressure inside the dust cup body 31, the bottom end of the filter bracket 3211 can be tightly sucked together with the movable cover 34, and a sealing structure such as a sealing ring is used between the bottom of the filter bracket 3211 and the movable cover 34 to achieve a sealing effect. However, in positive pressure self-dust collection mode, since the bottom end of the filter bracket 3211 is not fixedly connected to the movable cover 34, the movable cover 34 will be blown open under positive pressure, causing the bottom opening of the filter bracket 3211 to open. Therefore, during self-cleaning operations, dust and other debris on the outer wall of the HEPA body 3222 can be blown down and introduced into the base station 40. For the spiral air guide structure 32111, for example… Figure 6 As shown in (6c), the projection of the spiral air guide structure 32111 onto the horizontal plane is a ring. The arrangement of the first air outlet 32112 on the spiral air guide structure 32111 can be partially spiral or fully spiral. Specifically, any first air outlet 32112 can be, but is not limited to, as shown in (6c). Figure 6 In the waist-shaped or elliptical holes shown in (6b) and (6c), the extension direction of any first air outlet 32112, i.e., its major axis, forms an angle with the line connecting the center of the ring and any end of the first air outlet 32112 (the end closest to or furthest from the center of the ring). In other words, the extension direction of any first air outlet 32112 is not along the radius or diameter of the ring, but forms an angle with the radius or diameter of the ring, and this angle is not zero. This design allows the airflow during self-cleaning to form a spiral airflow, achieving a better self-cleaning and dust removal effect. Preferably, the angle formed by the extension direction of all first air outlets 32112 and the line connecting the midpoint of the ring and any end of the first air outlet 32112 is equal. This facilitates design and manufacturing, and further promotes the formation of a spiral airflow, thus improving the self-cleaning effect. It should be noted that the airflow channel is different in vacuuming mode and positive pressure dust collection mode. Specifically, in vacuuming mode, the airflow channel is the space defined between any adjacent folds on the inner wall of the HEPA body that is opposite to the filter support. In dust blowing mode, the airflow channel is the space defined between any two adjacent folds on the outer wall of the HEPA body.

[0033] Some preferred embodiments of the present invention, such as Figures 15 to 16 As shown, the base station 40 has a housing cavity 41 inside, and a dust bag 42 is also installed inside the housing cavity 41. A dust collection and exhaust port 44, which communicates with the inside of the housing cavity 41 and the outside, is opened on the side wall of the base station 40. An air outlet filter 43, such as a plate-shaped or sheet-shaped HEPA filter, is installed between the air outlet of the housing cavity 41 (i.e., the port connecting to the dust bag 42) and the dust collection and exhaust port 44. Preferably, the air inlet of the housing cavity 41 is also... Figure 15 The area of ​​the upper opening of the storage cavity 41 shown is not less than the area of ​​the air inlet of the fan assembly 20, and the area of ​​the dust collection exhaust port 44 is not less than 1.5 times the area of ​​the air inlet of the fan assembly 20, i.e., the area of ​​the first air inlet 221. It should be noted that this multiple cannot be too large or too small; it is an ideal multiple obtained by the applicant through optimized design. If it is too large, it will not be conducive to forming an effective blowing force in the dust cup body, i.e., it will not be conducive to the self-cleaning of the dust cup assembly. If it is too small, it will not be conducive to dust collection in the base station. The volume of the storage cavity 41 is not less than the effective volume of the dust cup body 31 that can hold garbage, i.e., the volume of the space after subtracting the space occupied by the filter assembly 32. Optionally, as Figure 16 As shown, the base station 40 also includes a support body 47, and the base at the bottom of the support body 47 is provided with a plurality of foldable or openable support legs 48 spaced circumferentially. On the outer surface of the base station 40 corresponding to the outer side of the air outlet filter 43, a side cover (not shown) that can be opened to remove the internal air outlet filter 43 for cleaning or replacement may also be provided.

[0034] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A cleaning apparatus having a suction, self-cleaning and dust collection, comprising a suction cleaner main body and a base station, characterized in that, The cleaning equipment has a dust suction mode and a positive pressure self-dust collection mode. The positive pressure self-dust collection mode includes two modes: self-cleaning and dust collection. The power source for both the dust suction mode and the positive pressure self-dust collection mode comes from the same fan assembly. The vacuum cleaner body, when placed on the base station, can automatically switch from vacuuming mode to positive pressure self-collecting mode. The switching between vacuuming mode and positive pressure self-collecting mode is achieved by switching at least one of the air inlet duct and air outlet duct. The vacuum cleaner body includes a body assembly, a fan assembly and a dust cup assembly mounted on the body assembly; the dust cup assembly includes a filter assembly, which includes a cyclone separator and a HEPA filter assembly located in the middle of the cyclone separator; The cyclone separator includes a filter support, which comprises a first section, a second section, and a third section arranged axially. The outer wall of the filter support has a spiral air guide structure, which includes a guide wall extending axially from the first section toward the third section and a windproof wall formed on the outside of the guide wall extending axially. The guide wall and the windproof wall form a spiral guide groove. In the installed state, the filter support has an opening at one end facing the fan assembly for fixing the HEPA assembly, and several through first air outlets are formed on the spiral air guide structure. The projection of the spiral air guide structure in the horizontal direction is a ring, and the extension direction of any first air outlet forms an angle with the line connecting the center of the ring and any end of the first air outlet. The HEPA assembly includes a HEPA frame, a HEPA body, and a HEPA bottom cover. The HEPA frame has several second air outlets. The HEPA body is mounted on the HEPA frame and has several pleats. An airflow channel is formed between any two adjacent pleats along the axial direction of the cyclone separator. The HEPA bottom cover is located at the end of the HEPA body away from the HEPA frame, and the HEPA bottom cover has a clearance notch at any airflow channel.

2. The cleaning apparatus having dust suction, self-cleaning and dust collection according to claim 1, wherein, After the vacuum cleaner body is removed from the base station, the air duct automatically switches back to the air duct of the vacuuming mode.

3. A cleaning device with dust suction, self-cleaning, and dust collection functions according to claim 1 or 2, characterized in that, The body assembly has a fan bracket for mounting the fan assembly. The position or angle of the fan assembly and one of the fan brackets relative to the body assembly or dust cup assembly changes in dust suction mode and positive pressure self-collection mode, so that the fan assembly and the fan bracket are connected in a switchable air duct manner.

4. The cleaning apparatus having dust suction, self-cleaning and dust collection of claim 3, wherein, The body assembly is connected to an air intake channel and is equipped with a dust extraction exhaust port and a dust blowing air intake port; The fan assembly has a first air inlet, a first air outlet, and a first air outlet. The fan support has a second air inlet, a second air outlet and a third air inlet; In vacuuming mode, the air inlet duct, dust cup assembly, second air inlet, first air inlet, first air outlet, and vacuum exhaust outlet are sequentially connected; in positive pressure self-collection mode, the dust blowing inlet, third air inlet, first air inlet, first blowing outlet, second blowing outlet, and dust cup assembly are sequentially connected; or The fan assembly has a first air inlet and a first air outlet; The fan support has a second air inlet, a second air outlet and a third air inlet; In vacuuming mode, the air inlet channel, dust cup assembly, second air inlet, first air inlet, first blower, and vacuum exhaust port are sequentially connected; in positive pressure self-dust collection mode, the dust blowing air inlet, third air inlet, first air inlet, first blower, second blower, and dust cup assembly are sequentially connected.

5. The cleaning apparatus having dust suction, self-cleaning and dust collection of claim 4, wherein, The dust cup assembly also includes a dust cup body, a bottom cover plate located at the bottom of the dust cup body, and a movable cover plate movably connected to an opening on the bottom cover plate. In the dust suction mode, the movable cover plate is locked and closed by a locking element located on the bottom cover plate. The base station is provided with a first trigger for unlocking the movable cover plate and a second trigger for switching the air duct. In positive pressure self-dust collection mode, the movable cover is unlocked by the first trigger and blown open by the positive pressure airflow to connect the dust cup body with the base station; The vacuum cleaner body is provided with a push component that can be triggered by the second trigger and drive one of the fan components or fan brackets to change position or angle relative to the body component or dust cup component, thereby realizing the switching of the air duct.

6. The cleaning apparatus having dust suction, self-cleaning and dust collection of claim 5, wherein, The fan assembly is rotatably mounted inside the body assembly, and the second triggering element switches the air duct by triggering a change in the position or angle of the fan assembly relative to the body assembly or the dust cup assembly; The pushing assembly includes a first pushing assembly disposed within the dust cup body and capable of displacement upon triggering and resetting after the trigger is released, and a second pushing assembly disposed on the fan bracket and capable of displacement upon triggering by the displacement of the first pushing assembly and resetting after the trigger is released. The second pushing assembly is located on the path of displacement of the first pushing assembly after being triggered, and the end of the second pushing assembly away from the first pushing assembly is connected to the fan assembly. In positive pressure self-dust collection mode, the first pushing component is triggered by the second trigger and moves toward the second pushing component. The second pushing component is triggered by the displacement of the first pushing component and moves away from the first pushing component. The fan component changes angle relative to the body component to achieve air duct switching.

7. The cleaning device with dust suction, self-cleaning and dust collection of claim 6, wherein, The fan assembly or drive assembly is also provided with a micro switch, which is connected to the fan body circuit. When the fan assembly is switched into position, the circuit between the micro switch and the fan body is connected, and the fan body is started to work to perform self-cleaning and dust collection operations. After a predetermined time, the fan body is turned off and the system switches to charging the vacuum cleaner body.

8. A cleaning device with dust suction, self-cleaning, and dust collection functions according to claim 5, characterized in that, The cyclone separator also includes a filter screen installed on the filter bracket. In the installed state, the end facing the movable cover has a blowing dust-blocking structure that is closed in dust suction mode or opened in positive pressure self-collecting dust mode. In the installed state, the filter bracket also has an air inlet dust-blocking structure at the air outlet position facing the air inlet channel, which is opened in dust suction mode to guide the air inlet channel and the dust cup body, and closed in positive pressure self-collecting dust mode to cut off the air inlet channel and the dust cup body. In vacuuming mode, the air intake dust barrier structure is open and the air blowing dust barrier structure is closed. The airflow with dust and debris drawn in from the air intake channel enters the dust cup body and is filtered by the filter screen along the spiral air guide structure. The airflow then enters the filter bracket and enters the blower assembly through the top opening of the HEPA body along the airflow channel, and finally is discharged through the vacuum exhaust port. In positive pressure self-dust collection mode, the air inlet dust barrier structure is closed and the air blowing dust barrier structure is open. The airflow entering through the dust blowing inlet passes through the fan assembly and then through the second air blowing port. Part of the airflow is blown into the space between the inner wall of the filter bracket and the outer wall of the HEPA body, and part of the airflow is blown into the space between the outer wall of the filter bracket and the inner wall of the dust cup body. Finally, the airflow enters the base station through the opening at the bottom of the dust cup body to achieve self-dust collection and self-cleaning of the filter assembly and the inner wall of the dust cup body.

9. The cleaning device with dust suction, self-cleaning and dust collection of claim 8, wherein, The dust-blocking structure is a dust-blocking sheet made of soft material or a one-way valve; or In the installed state, the filter bracket does not have a blowing and dust blocking structure on the end facing the movable cover. Instead, it has an opening that extends directly to the inner surface of the movable cover. In the dust suction mode, the negative pressure suction and the sealing structure between the bottom of the filter bracket and the movable cover ensure that the two are in close contact and sealed.

10. The cleaning apparatus having dust suction, self-cleaning and dust collection of claim 3, wherein, The body assembly also integrates a battery pack or power source. The power source for the operation of the power source in the dust collection mode and the positive pressure self-collection mode is the same, namely the battery pack or power source.

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