A filtration assembly, a vacuum cleaner and a cleaning kit

Abstract

The application discloses a filter assembly, a dust collector and a cleaning set, the filter assembly comprising a cyclone separator and a HEPA assembly; the cyclone separator comprising a filter support and a filter screen, a side wall of one end of the filter support being formed with a spiral air guide structure which protrudes radially outward and spirally extends towards the side of the filter screen, and a plurality of first air outlet holes being formed in the spiral air guide structure; the HEPA assembly comprising a HEPA support and a HEPA body, a plurality of second air outlet holes being formed in the HEPA support, and the HEPA body being arranged on the HEPA support and comprising a plurality of folds, and a gas flow circulation channel being formed between any two adjacent folds along the axial direction of the cyclone separator. The spiral air guide structure and the spiral first air outlet holes formed in the air guide structure can not only realize gas-solid separation in the dust collection state, but also realize self-cleaning of the inside and outside of the filter assembly and the inner wall of the dust cup in the self-dust collection process. The structure is simple, and the self-cleaning dust discharge effect is good.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, specifically to a filter assembly, a vacuum cleaner, and a cleaning kit. 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 create negative pressure, sucking up debris and other impurities into a dustbin. The dustbin has a small capacity, and the dustbin needs to be opened to empty it after use. However, this process often scatters dust, causing secondary pollution. To address these issues, base stations with dust collection functions have emerged on the market, collecting dust from the dustbin and preventing it from being scattered. For example, Chinese patent document CN218651617U discloses a dust collection system for a vacuum cleaner base station, including a base station and a vacuum cleaner. The base station includes a base, a support rod, and a support component. The support component has a dust collection chamber. The base has a dust collection bag and a negative pressure component. The vacuum cleaner includes a hand handle and a dust collection cup. The dust collection cup has a dust cup body and a dust cup bottom cover. The dust cup body has a release button to control the rotation of the dust cup bottom cover to open or close. When the vacuum cleaner is placed on the base station, the trigger part on the base station triggers the bottom cover release button, the dust cup bottom cover opens, and the negative pressure component draws in, creating a negative pressure inside the collection chamber. The dust inside the dust cup body automatically falls and is collected in the base station, achieving the purpose of self-collection of dust. This conventional cleaning equipment solution features two suction devices in the entire cleaning kit. One device is located inside the vacuum cleaner, creating negative pressure in the dust cup during vacuuming to achieve the purpose of dust removal. The other device creates negative pressure in the dust collection chamber of the base station during dust collection, thus collecting the dust from the dust cup. This approach is costly, and because the airflow passes through a long suction channel at the front, there is significant airflow loss, resulting in a smaller overall effective airflow and poor dust collection. Furthermore, the entire cleaning kit is heavy, making it inconvenient for customers to move. In addition, the dust cup of a vacuum cleaner typically contains a filtration component for separating dust particles, such as a conventional cyclone filter. As a core component of the vacuum cleaner, this filtration component accumulates a lot of dust and debris after frequent use, leading to a decrease in filtration efficiency. Cleaning is necessary to improve its filtration effect, but cleaning has always been a major problem for consumers. The earliest technology typically involved disassembling the filter assembly and manually washing and blowing it. However, this method is cumbersome and inefficient. During hand washing, dust is close to the person, making it easy for it to enter the respiratory system. Therefore, it cannot meet current market demands. To solve this problem, various self-cleaning filter structures have emerged on the market, which can be broadly divided into contact cleaning structures and non-contact cleaning structures. Contact cleaning structures use scraper strips, brush strips, scrapers, etc., to directly act on the filter screen, while non-contact structures use methods such as tapping vibration or negative pressure suction.Contact cleaning methods typically operate simultaneously with the vacuum cleaner's startup, preventing users from selecting the self-cleaning time. They are also noisy, impacting the user experience, and their cleaning effectiveness is often poor. Hard cleaning components like scrapers can easily damage the filter 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, the filter self-cleaning device and vacuum cleaner disclosed in Chinese patent publication CN116019386A include a housing, power source, transmission assembly, cam, striking element, and elastic element. The striking element consists of a contact part and a striking part. The contact part contacts the cam, and the striking part strikes the object connected to the filter. The striking causes the filter to vibrate, separating dust from the filter screen, thus cleaning the filter. However, this solution has two drawbacks: firstly, the filter self-cleaning device has a very complex structure, leading to high design costs; secondly, the striking element can only clean the filter screen and cannot clean dust adhering to the inner wall of the dust cup. In negative pressure suction solutions, on the one hand, additional suction devices are required, leading to higher costs; on the other hand, because the suction airflow needs to pass through a long suction channel at the front end, airflow loss is significant, and the actual airflow entering the dust cup to backwash the filter screen is small, resulting in poor self-cleaning effect of the filter. Furthermore, most existing filter components use cyclone filtration structures, but these structures are only used for gas-solid separation during dust collection, and their function is relatively simple, requiring further improvement to enhance their functionality. Therefore, this invention was developed to address the aforementioned problems. Summary of the Invention

[0003] In view of at least one of the above-mentioned technical problems, the present invention aims to provide a filter assembly, a vacuum cleaner, and a cleaning kit.

[0004] The technical solution of this invention is: One object of the present invention is to provide a filtration assembly, including a cyclone separator for primary filtration and a HEPA assembly for secondary filtration disposed within the cyclone separator; the cyclone separator includes a filter support and a filter screen disposed on the filter support, wherein a guide structure is formed on the side wall of one end of the filter support, protruding radially outward and spirally extending toward the filter screen, and the guide structure has a plurality of through first air outlet holes. The HEPA assembly includes a HEPA bracket and a HEPA body. The HEPA bracket is adapted to be fixed to one end of the filter bracket with the first air outlet and has a plurality of second air outlets thereon. The HEPA body is disposed on the HEPA bracket and includes a plurality of pleats. An airflow channel along the axial direction of the cyclone separator is formed between any two adjacent pleats. When used in a vacuum cleaner, the filter assembly has a suction mode and a blowing mode. In the suction mode, the other end of the filter bracket is closed, and the airflow forms a spiral airflow along the outer contour of the air guide structure. After passing through the filter screen for a first filtration, the airflow enters the filter bracket and is then filtered a second time by the HEPA component before being discharged through the airflow channel from the top opening of the HEPA body. In the blowing mode, the airflow enters the filter bracket through the second air outlet and is partly blown through the first air outlet into the space between the outer wall of the filter screen and the inner wall of the dust cup body of the vacuum cleaner, and partly blown into the space between the inner wall of the filter bracket and the outer wall of the HEPA body, thereby achieving self-cleaning of the cyclone separator, HEPA component, and dust cup.

[0005] Another object of the present invention is to provide a vacuum cleaner, including a brush head assembly, a body assembly, a fan assembly, and a dust cup assembly. The brush head assembly is connected to an air inlet channel on the body assembly via an extension tube. The fan assembly and the dust cup assembly are mounted on the body assembly. The dust cup assembly includes a dust cup body and a filter assembly disposed within the dust cup body. The filter assembly is any of the filter assemblies described above.

[0006] Another object of the present invention is to provide a cleaning kit, including a vacuum cleaner and a base station, wherein the vacuum cleaner is the aforementioned vacuum cleaner, and / or, the power source for both the base station in the dust collection state and the vacuum cleaner in the dust collection state is the fan assembly inside the vacuum cleaner, and in the dust collection state, the fan assembly blows air in the forward direction into the dust cup assembly and the base station.

[0007] Compared with the prior art, the advantages of the present invention are: This invention discloses a filter assembly with a spiral air guide structure and several spiral first air outlet holes on the air guide structure. This not only achieves gas-solid separation during dust collection but also enables self-cleaning of the filter assembly's interior, exterior, and dust cup inner wall during dust collection. It features a simple structure and excellent self-cleaning and dust removal performance. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the cleaning kit according to an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the filter component according to an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the bottom-up structure of the filter component in the image; Figure 4 for Figure 2 A top view of the filtering component; Figure 5 for Figure 2 A cross-sectional view of the filter assembly (arrows indicate the airflow direction in suction and blowing modes). Figure 6 for Figure 2 The main view of the HEPA filter component; Figure 7 for Figure 2 A three-dimensional structural diagram of the HEPA filter assembly with the bottom facing upwards; Figure 8 for Figure 2 A top view of the HEPA filter assembly; Figure 9 This is a cross-sectional view of a vacuum cleaner according to an embodiment of the present invention. Detailed Implementation

[0009] 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.

[0010] A filtering component according to an embodiment of the present invention, see [link to relevant documentation]. Figures 2 to 8The system includes a cyclone separator 321 and a HEPA filter assembly 322, wherein the HEPA filter assembly 322 is located inside the cyclone separator 321 and is used as a filter element. The cyclone separator 321 is used for primary filtration, and the HEPA filter assembly 322 is used for secondary filtration. The cyclone separator 321 includes a filter support 3211 and a filter screen 3212 disposed on the filter support 3211. An air guide structure 32111 is formed on the side wall of one end of the filter support 3211, which protrudes radially outward and spirally extends toward the filter screen 3212. The air guide structure 32111 has several through first air outlet holes 32112. HEPA component 322 includes HEPA bracket and HEPA body 3222. HEPA bracket is adapted to be fixed to one end of filter bracket 3211 with a first air outlet 32112 and a plurality of second air outlets 32211 thereon. HEPA body 3222 is disposed on HEPA bracket and includes a plurality of pleats 32221. An airflow passage 32222 is formed between any two adjacent pleats 32221 along the axial direction of cyclone separator 321. It should be noted that the top of HEPA body has an opening so that airflow can be discharged from the dust cup assembly through the opening when vacuuming. When used in a vacuum cleaner, the filter assembly 32 has a vacuuming state and a blowing state. In the vacuuming state, the other end of the filter bracket 3211 is closed, and the airflow forms a spiral airflow along the outer contour of the air guide structure. After the filter screen 3212 filters once, it enters the filter bracket 3211 and is filtered a second time by the HEPA assembly 322. Then, it is discharged from the top opening of the HEPA body along the airflow channel 32222. That is to say, in the vacuuming state, the airflow does not pass through the second air outlet 32211 when it is discharged. In the blowing state, the airflow enters the filter bracket 3211 through the second air outlet 32211 and part of it is blown through the first air outlet 32112 into the space between the outer wall of the filter screen 3212 and the inner wall of the dust cup body 31 of the vacuum cleaner, and part of it is blown into the space between the inner wall of the filter bracket 3211 and the outer wall of the HEPA body 3222, so as to achieve self-cleaning of the cyclone separator 321, the HEPA assembly 322 and the dust cup. The filter assembly of this invention features a spiral air guide structure 32111 with several spiral first air outlet holes 32112. This not only enables gas-solid separation during dust collection but also allows for self-cleaning of the filter assembly 32's interior, exterior, and the inner wall of the dust cup during dust collection. The structure is simple and offers excellent self-cleaning and dust removal performance.

[0011] It should be noted that in this embodiment of the invention, the HEPA body 3222 is formed by repeatedly folding a sheet or plate-shaped HEPA into a frustum structure, with each fold 32221 forming as follows: Figure 7 The triangular shape shown, and the airflow channel 32222 formed between any two adjacent folds 32221 are also triangular.

[0012] Specifically, such as Figures 2 to 8 As shown, the filter holder 3211 has a cavity in the middle to facilitate the installation of the HEPA assembly 322. The following description and explanation will be based on the use of the filter holder 3211 as an example. Figure 2 As shown, from top to bottom, the filter bracket 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 bracket 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. In this embodiment of the invention, the air guide structure is preferably as follows: Figure 3 The spiral air guide groove shown, specifically, the air guide structure includes the axial direction, i.e., as shown... Figure 5 The diagram shows a guide wall 321111 extending downwards spirally from the top of the first section, and a windbreak wall 321112 extending axially on the outside of the guide wall 321111. The top of the first section has an opening for placing and securing the HEPA assembly 322. A filter screen 3212 is provided on the second section, and the third section is inverted conical in shape, preferably, as shown in the diagram. Figure 3 As shown, the third paragraph specifically refers to... Figure 2 The lower end shown has a blowing dust-blocking structure 3214 that closes in the dust-suction state and opens in the dust-blowing state. The air-guiding structure, i.e., the spiral air-guiding groove, specifically has several through first air outlet holes 32112 on the guide wall 321111, and the lower end outlet of the spiral air-guiding groove extends to connect with the outer side of the filter screen 3212. In the installed state, the filter bracket 3211 also has an air-inlet dust-blocking structure 3213 at the air outlet position facing the air inlet channel. This structure opens in the dust-suction state to guide the air inlet channel and the dust cup body 31, and closes in the positive pressure dust-blowing state to cut off the air inlet channel 11 and the dust cup body 31. Preferably, the air-inlet dust-blocking structure is rotatably set on the top side wall of the first section of the filter bracket 3211, and flips to block the entrance of the spiral air-guiding groove after the air inlet channel is opened. That is to say, in the dust-suction state, the airflow entering the dust cup body 31 from the air inlet channel will not enter the interior of the spiral air-guiding groove, but will only spiral downward along the outer wall of the spiral air-guiding groove to form a spiral airflow. For HEPA module 322, such as Figures 6 to 8 As 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 7 and Figure 8As shown, the HEPA holder 3221 is a circular tray, and there are two sets of second air outlets 32211 on the HEPA holder 3221. The two sets of second air outlets 32211 are concentric but have different radii, that is, the HEPA holder 3221 has 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 support 3211. In other words, the projection of the second air outlets 32211 of the inner ring and the space between the inner wall of the cyclone separator 321 and the outer wall of the HEPA body 3222 overlaps in the horizontal plane. The second air outlets 32211 of the outer ring correspond to the first air outlet 32112. That is to say, the projection of the second air outlets 32211 of the outer ring and the first air outlet 32112 overlaps in the horizontal plane.

[0013] According to some preferred embodiments of the present invention, the HEPA assembly 322 further includes a HEPA bottom cover 3223 disposed at one 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 passage 32222. It should be noted that the two sides of the avoidance notch 32231 are on the same plane as the corresponding surface of the corresponding pleat 32221. That is to say, in the vacuuming state and the blowing state, the airflow through the airflow passage 32222 will not be blocked, and the airflow direction through the filter bracket 3211 is opposite in the two states. Taking the airflow direction inside the filter bracket 3211 in the vacuuming state as positive, the airflow inside the filter bracket 3211 in the blowing state is reversed. That is, in the blowing state, 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 the outer wall of the filter bracket 3211 and the inner wall of the dust cup body 31. In the cleaning device of this embodiment, during vacuuming, the airflow can directly enter the airflow channel 32222 through the clearance notch 32231 for secondary filtration. During blowing, specifically in self-cleaning mode, the airflow blows through the airflow channel 32222 onto the HEPA filter body 3222 and then exits through the clearance notch 32231 and the bottom opening of the filter bracket 3211. Furthermore, the clearance notch 32231 ensures that no dust remains in dead corners during self-cleaning, significantly improving the filter's self-cleaning efficiency. Specifically, as... Figure 6As shown, 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 having multiple pleats 32221. It should be noted that the airflow channel is different in the vacuuming state and the blowing state. Specifically, as described above, in the vacuuming state, the airflow channel 32222 is the space defined between any adjacent folds on the inner wall of the HEPA body 3222 that faces away from the filter support 3211. In the blowing state, the airflow channel 32222 is the space defined between any two adjacent folds on the outer wall of the HEPA body 3222.

[0014] In this embodiment of the invention, under vacuum conditions, the air inlet dust barrier structure 3213 is open, and the air blowing dust barrier structure 3214 is closed. The airflow carrying dust and debris drawn into the air inlet channel enters the dust cup body 31 and undergoes a first filtration along the air guide structure and filter screen 3212. The dust particles then fall directly to the ground. The airflow enters the filter bracket 3211 and undergoes a second filtration along the airflow channel 32222 before entering the fan assembly 20 through the second air outlet 32211 and finally exiting through the vacuum exhaust port 12. Under positive pressure blowing conditions, the air inlet dust barrier structure 3213 is closed, and the air blowing dust barrier structure 3214 is closed. When structure 3214 is opened, 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 dust blowing state, part of the airflow exits through the first outlet 32112 and also forms a spiral airflow around the outer wall of the air guide structure. This part of the airflow has the same vortex direction as the airflow entering the dust cup body 31 through the air inlet channel in the dust suction state, which can achieve self-cleaning of the outer wall of the cyclone filter 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 improvement of the structure of the filter component 32, although the airflow of the cleaning device of this embodiment of the invention blows the filter component 32 in the opposite direction in the dust blowing state, just like the existing suction self-cleaning cleaning device, the cleaning device of this embodiment of the invention, through the structural setting and the adoption of positive pressure self-cleaning method, can not only achieve self-cleaning of the outer wall of the cyclone filter and the outer wall of the HEPA body 3222, but also achieve self-cleaning of the inner wall of the dust cup. 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 wind force is stronger, and the self-cleaning effect is naturally better.

[0015] For the blower dust-blocking structure 3214, it is a dust-blocking sheet made of existing conventional soft materials, such as... Figure 4The image shows a rubber sheet cut in a cross shape in the middle. As an alternative embodiment, the blowing dust-blocking structure 3214 can also be a conventional one-way valve, where air can only flow in one direction. That is, in suction mode, air cannot enter the filter bracket 3211 from bottom to top, but in blowing mode, the airflow can be discharged from inside 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, extending directly to contact the inner surface of the movable cover plate 34 on the bottom cover plate 33 of the dust cup body 31, rather than being fixed. In the vacuuming state, 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 plate 34 to achieve a sealing effect. In the positive pressure blowing state, since the bottom end of the filter bracket 3211 and the movable cover plate 34 are not fixedly connected, the movable cover plate 34 will be blown open under the action of positive pressure, so that the bottom opening of the filter bracket 3211 will be opened. Thus, during the self-cleaning operation, dust and other debris on the outer wall of the HEPA body 3222 can be blown down and introduced into the base station 40.

[0016] For air guiding structures, such as Figure 4 As shown, the projection of the air guide structure onto the horizontal plane is a circular ring. The arrangement of the first air outlet 32112 on the air guide structure can be partially spiral or fully spiral. Specifically, any first air outlet 32112 can be, but is not limited to, as shown in the figure below. Figure 3 and Figure 4 The waist-shaped or elliptical holes shown are arranged such that the extension direction (i.e., the major axis) of any first air outlet 32112 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, further improving the self-cleaning effect.

[0017] This invention also provides a vacuum cleaner, such as... Figures 2 to 9As shown, the assembly includes a brush head assembly 50, a body assembly 10, a fan assembly 20, and a dust cup assembly 30. The brush head assembly 50 is connected to the air inlet channel on the body assembly 10 via an extension tube. The fan assembly 20 and the dust cup assembly 30 are mounted on the body assembly 10. The dust cup assembly 30 includes a dust cup body 31 and a filter assembly 32 disposed within the dust cup body 31. The filter assembly 32 is the same as the filter assembly 32 in the above embodiment. Because the filter assembly 32 of the above embodiment is used, it at least has the beneficial effects of the filter assembly 32 of the above embodiment, and will not be described in detail here. As for the brush head assembly 50, it is a conventional roller brush type floor brush assembly, and will not be described in detail or limited, and is not the inventive point of this application.

[0018] This invention also provides a cleaning kit, such as... Figures 1 to 9 As shown, the system includes a vacuum cleaner and a base station 40. The vacuum cleaner is the same as the one described in the above embodiment. Because the vacuum cleaner described in the above embodiment is used, it at least has the beneficial effects of the vacuum cleaner described above, which will not be described in detail here.

[0019] According to some preferred embodiments of the present invention, the power source for the cleaning kit in both the dust collection and suction states is the fan assembly 20 inside the vacuum cleaner. In the dust collection state, the fan assembly 20 blows air in a forward direction into the dust cup assembly 30 and the base station 40, which is opposite to the airflow direction in the suction state when the vacuum cleaner is used alone. The specific structure and principle are not described in detail or limited here, but can be found in the description in the applicant's application document submitted on the same day, entitled "A Cleaning Device with Suction, Self-Cleaning, and Dust Collection Functions".

[0020] 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 filter assembly, characterized in that, The device includes a cyclone separator for primary filtration and a HEPA filter assembly for secondary filtration disposed within the cyclone separator. The cyclone separator includes a filter support and a filter screen disposed on the filter support. The sidewall of the filter support has an air guiding structure, and the filter support includes a first section, a second section, and a third section. The outer diameter of the first section is larger than that of the second and third sections. The outer wall surface of the first section has the air guiding structure. The air guiding structure includes a guide wall spirally extending downward from the top of the first section and an axially extending windbreak wall formed outside the guide wall. The second section is provided with the filter screen, and the third section is inverted conical in shape. The guide wall has several through first air outlet holes. The HEPA assembly includes a HEPA bracket and a HEPA body. The HEPA bracket is adapted to be fixed to one end of the filter bracket with the first air outlet and has a plurality of second air outlets thereon. The HEPA body is disposed on the HEPA bracket and includes a plurality of pleats. An airflow channel along the axial direction of the cyclone separator is formed between any two adjacent pleats. When used in a vacuum cleaner, the filter assembly has a suction mode and a blowing mode. In the suction mode, the other end of the filter bracket is closed, and the airflow forms a spiral airflow along the outer contour of the air guide structure. After passing through the filter screen for a first filtration, the airflow enters the filter bracket and is then filtered a second time by the HEPA component before being discharged through the airflow channel from the top opening of the HEPA body. In the blowing mode, the airflow enters the filter bracket through the second air outlet and is partly blown through the first air outlet into the space between the outer wall of the filter screen and the inner wall of the dust cup body of the vacuum cleaner, and partly blown into the space between the inner wall of the filter bracket and the outer wall of the HEPA body, thereby achieving self-cleaning of the cyclone separator, HEPA component, and dust cup.

2. A filter assembly according to claim 1, characterized in that, The projection of the air guide structure onto the horizontal plane is a ring, and at least part of the extension direction of the first air outlet and the line connecting the center of the ring with any end of the first air outlet form a non-zero angle.

3. A filter assembly according to claim 2, characterized in that, The angle between the extension direction of all the first air outlets on the horizontal projection plane and the line connecting the center of the ring to any end of the first air outlet is equal.

4. A filter assembly according to claim 1, characterized in that, The wall surface of the HEPA bracket with the second air outlet is a circular plane. The second air outlet includes two rings of air outlets distributed radially at intervals with the center of the circular plane as the center. The projection of the second air outlet of the inner ring and the space between the inner wall of the cyclone separator and the outer wall of the HEPA body on the horizontal plane overlaps, and the projection of the second air outlet of the outer ring and the first air outlet on the horizontal plane overlaps.

5. A filter assembly according to claim 1, characterized in that, The HEPA assembly also includes a HEPA bottom cover, which is located at the end of the HEPA body away from the HEPA support, and the HEPA bottom cover has an avoidance notch corresponding to any airflow channel.

6. A filter assembly according to claim 1, characterized in that, The HEPA body is in the form of a column or sheet.

7. A filter assembly according to any one of claims 1-6, characterized in that, The other end of the filter bracket is inverted conical and extends to contact the movable cover plate on the bottom cover of the dust cup of the vacuum cleaner, or has a blowing dust-blocking structure that can be closed in the vacuuming state and opened in the blowing state.

8. A filter assembly according to claim 7, characterized in that, The dust-blocking structure is either a dust-blocking sheet made of a soft material or a one-way valve.

9. A vacuum cleaner, comprising a brush head assembly, a body assembly, a fan assembly, and a dust cup assembly, wherein the brush head assembly is connected to an air inlet channel on the body assembly via an extension tube, the fan assembly and the dust cup assembly are mounted on the body assembly, and the dust cup assembly comprises a dust cup body and a filter assembly disposed within the dust cup body, characterized in that... The filter component is the filter component according to any one of claims 1-8.

10. A cleaning kit comprising a vacuum cleaner and a base station, characterized in that, The vacuum cleaner is the vacuum cleaner according to claim 9, and / or, the power source for both the base station in the dust collection state and the vacuum cleaner in the dust collection state is the fan assembly inside the vacuum cleaner, and in the dust collection state, the fan assembly blows air in the forward direction to the dust cup assembly and the base station.

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