Filter, filtering mechanism and pool cleaning robot

Abstract

The embodiment of the application provides a filter, a filtering mechanism and a pool cleaning robot, a filter comprises a filtering piece, the filtering piece comprises a first flexible filtering part, at least part of which is made of filtering cotton to form a first filtering surface, and is used for fine filtering of liquid; the first flexible filtering part surrounds a second cavity; a second connecting part is arranged at least at the lower end of the second cavity and is made of non-filtering cotton to support at least the lower end of the first flexible filtering part; the second connecting part is provided with a first opening, and the first opening is used for allowing liquid in a pool to enter the second cavity.

Description

[0001] This application claims priority to Chinese Patent Application No. 202610210919.6, filed on February 12, 2026, entitled "Filter, Filtering Mechanism and Pool Cleaning Robot", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of cleaning technology, and more particularly to a filter, a filtration mechanism, and a pool cleaning robot. Background Technology

[0003] In the prior art, the cleaning of pools (e.g., swimming pools) is usually carried out by pool cleaning robots (or swimming pool cleaning robots). Pool cleaning robots clean the bottom, walls, surface or waterline of the pool by walking automatically.

[0004] Existing pool cleaning robots include a first inlet, an outlet, a suction component, and a filter. Under the suction action of the suction component, the liquid in the pool enters the filter from the first inlet and is filtered by the filter. The debris remains in the filter, and the filtered liquid is discharged into the pool from the outlet, thereby cleaning the liquid in the pool.

[0005] However, the filters of existing pool cleaning robots cannot filter out fine debris (such as sand). When liquid carrying fine debris enters the filter, the debris does not remain in the filter but is discharged into the pool along with the filtered liquid from the outlet. This causes the fine debris to be sprayed out of the pool cleaning robot's outlet, resulting in a dust spray phenomenon and poor cleaning effect of the pool cleaning robot. Summary of the Invention

[0006] To overcome the above-mentioned defects, the purpose of this application is to provide a filter, a filtration mechanism, and a pool cleaning robot. The filtration mechanism of this application can not only filter large-sized garbage, but also filter small garbage, thereby improving the cleaning effect of the pool cleaning robot.

[0007] To address this, this application provides a filter, including a filter element. The filter element includes a first flexible filter section, at least partially made of filter cotton, to form a first filter surface for fine filtration of liquid. The first flexible filter section encloses a second cavity. A second connecting portion, made of non-filter cotton, is located at least at the lower end of the second cavity to at least support the lower end of the first flexible filter section. The second connecting portion has a first opening through which liquid from a water tank enters the second cavity. Because the first flexible filter section is made of filter cotton, it can finely filter the liquid, retaining fine debris within the first filter and preventing it from spraying out of the outlet, thereby improving the cleaning effect of the first filter. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A simplified structural diagram of a filtration mechanism provided in one embodiment of this application;

[0010] Figure 2 for Figure 1 AA section view;

[0011] Figure 3 A simplified structural diagram of a first filter provided in an embodiment of this application;

[0012] Figure 4 A simplified structural diagram of an installation component provided in one embodiment of this application;

[0013] Figure 5 A simplified structural diagram of a filter element provided in one embodiment of this application;

[0014] Figure 6 A simplified structural diagram of a second filter provided in an embodiment of this application;

[0015] Figure 7 A simplified structural diagram of a filtering mechanism provided in another embodiment of this application from a first-view perspective;

[0016] Figure 8 A simplified structural diagram of a filtering mechanism provided in another embodiment of this application from a second perspective;

[0017] Figure 9A for Figure 7 BB section view;

[0018] Figure 9BA simplified structural diagram of a first filter provided in an embodiment of this application;

[0019] Figure 10 A simplified structural diagram of the filtration mechanism provided in a first state according to another embodiment of this application;

[0020] Figure 11 A simplified structural diagram of the filtration mechanism provided in a second state according to another embodiment of this application;

[0021] Figure 12 for Figure 11 CC section view;

[0022] Figure 13 A simplified structural diagram of the first filter provided in another embodiment of this application;

[0023] Figure 14 A simplified structural diagram of the mounting component provided in another embodiment of this application;

[0024] Figure 15 A simplified structural diagram of a filter element provided in another embodiment of this application;

[0025] Figure 16 for Figure 13 DD sectional view;

[0026] Figure 17 A simplified structural diagram of a second filter is provided for yet another embodiment of this application;

[0027] Figure 18 A simplified structural diagram of a filtration mechanism provided in yet another embodiment of this application;

[0028] Figure 19 A simplified structural diagram of a first filter provided in yet another embodiment of this application;

[0029] Figure 20 A simplified structural diagram of a filtration mechanism provided in yet another embodiment of this application;

[0030] Figure 21 for Figure 20 EE sectional view;

[0031] Figure 22A A simplified structural diagram of the first filter provided in another embodiment of this application from a first perspective;

[0032] Figure 22B A simplified structural diagram of the first filter provided in another embodiment of this application from a second perspective;

[0033] Figure 22C For this application Figure 20 A simplified diagram of the local structure of the first filter in the image;

[0034] Figure 22D For this application Figure 20 A simplified diagram of the local structure of the first filter in the image;

[0035] Figure 23 A simplified diagram of the first filter structure provided in yet another embodiment of this application;

[0036] Figure 24 A simplified structural diagram of a second filter provided in yet another embodiment of this application;

[0037] Figure 25 A simplified structural diagram of a filtration mechanism provided in yet another embodiment of this application;

[0038] Figure 26 for Figure 25 FF sectional view;

[0039] Figure 27 A simplified structural diagram of the first filter provided in another embodiment of this application from a first perspective;

[0040] Figure 28A A simplified structural diagram of the first filter provided in another embodiment of this application from a second perspective;

[0041] Figure 28B for Figure 28A A simplified cross-sectional diagram of the first filter;

[0042] Figure 29 A simplified structural diagram of a second filter provided in yet another embodiment of this application;

[0043] Figure 30 A simplified structural diagram of a filtration mechanism provided in yet another embodiment of this application;

[0044] Figure 31 A simplified structural diagram of the first filter provided in another embodiment of this application from a first perspective;

[0045] Figure 32 A simplified structural diagram of the first filter provided in another embodiment of this application from a second perspective;

[0046] Figure 33 A simplified structural diagram of a second filter provided in yet another embodiment of this application;

[0047] Figure 34A A cross-sectional view of a pool cleaning robot provided in an embodiment of this application;

[0048] Figure 34B A cross-sectional view of a pool cleaning robot provided in an embodiment of this application;

[0049] Figure 35A schematic diagram of the assembly of a filtration mechanism provided in an embodiment of this application within a water tank cleaning robot;

[0050] Figure 36A A simplified structural diagram of the second frame provided in an embodiment of this application;

[0051] Figure 36B A simplified structural diagram of a first frame provided in an embodiment of this application;

[0052] Figure 36C A simplified structural diagram of the first frame provided for yet another embodiment of this application. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0054] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0055] As described in the background section, the filter inside the pool cleaning robot in the related technology cannot filter out fine debris (such as sand). The reason for this problem is that the mesh diameter of the first filter screen is still relatively large compared to the fine debris, making it unable to filter it. The fine debris is discharged into the pool along with the filtered liquid from the outlet 102, causing the pool cleaning robot to experience dust spraying, meaning the first filter screen performs coarse filtration. For example, the first filter screen may be made of at least one of polyester (PET), nylon, or polypropylene, and the mesh structure has a regular mesh shape.

[0056] Therefore, this application aims to provide a filter; the first filter includes a filter element, and the first flexible filter portion of the filter element is made of filter cotton. For example, the filter cotton is made of at least one of non-woven fabric, polyester fiber, sponge, chemical fiber, glass fiber, and carbon fiber. Since the size of the filter mesh of the filter cotton is smaller than the size of the filter mesh of the first filter screen on the prior art filter, the filter cotton forms a fine filter. Therefore, the first flexible filter portion can filter small debris in the liquid, thereby improving the cleaning effect of the pool cleaning robot and reducing or avoiding the phenomenon of small debris being sprayed out of the pool cleaning robot's outlet.

[0057] There are two inventive concepts for this invention. One concept is to replace the filter in the prior art with the filter of this invention, allowing the filter to perform fine filtration of the liquid; that is, only the filter of this application is installed inside the pool cleaning robot. The other inventive concept is to retain the filter in the prior art (hereinafter referred to as the second filter for ease of description), and install the filter of this invention (hereinafter referred to as the first filter for ease of description) into the second filter. The liquid in the pool first enters the first filter for fine filtration, and then enters the second filter for coarse filtration. In this case, the primary function of the first filter screen of the second filter is to allow the liquid filtered by the first filter to flow through, so that the liquid filtered by the first filter leaves the filter and is finally discharged from the outlet 102 of the pool cleaning robot's outer shell.

[0058] In some embodiments of the first filter, since the first flexible filter part made of filter cotton is relatively soft and easily deformable, in order to support the first flexible filter part, the filter element includes a mounting member, the hardness of which is greater than that of the first flexible filter part, to support the first flexible filter part.

[0059] The mounting hardware facilitates the insertion of the first filter into the second filter, and the positioning of the first filter within the second filter is limited by the limiting action between the mounting hardware and the second filter, as well as its removal from the second filter; alternatively, it facilitates the insertion of the first filter into the housing of the pool cleaning robot, and the positioning of the first filter within the housing is limited by the limiting action between the mounting hardware and the housing, as well as its removal from the housing.

[0060] For example, the mounting component can be made of a rigid material, such as plastic or metal. Alternatively, the mounting component can be made of a deformable or flexible material, such as soft rubber or plastic, allowing it to be sewn onto the first flexible filter section.

[0061] The second filter is used for coarse filtration. The second filter includes a second frame and at least one first filter screen. For example, the second frame 2100 has multiple perforated structures, and the first filter screen can be installed on these perforated structures. Alternatively, the first filter screen may be located at least on the side of the second frame to form a third filter surface for coarse filtration of the liquid. A second liquid inlet 2101 is provided at the bottom of the second frame, and the inner cavity of the second liquid inlet forms a second liquid inlet channel. Liquid from the water tank enters the second filter through the second liquid inlet channel and is filtered by the first filter screen.

[0062] At least a portion of the first filter 1000 is disposed within the second filter 2000, and the second inlet channel is connected to the first opening of the first filter, so that the liquid in the water tank first enters the first filter for fine filtration through the second inlet channel and the first opening, and then enters the second filter for coarse filtration.

[0063] To facilitate the insertion of the first filter into the second filter, one inventive concept is: ... Figure 1 , Figure 20 , Figure 24 , Figure 29 as well as Figure 30 As shown, the second filter also includes a ninth opening 2106, which is located on the top of the second frame. The first filter is inserted into and removed from the inner cavity of the second filter through the ninth opening. Another concept is: as... Figure 10 and Figure 17 As shown, the second filter further includes a fifth opening 2300 and a bottom cover 2400. At least a portion of the fifth opening is located on the bottom of the second frame; the bottom cover is movably located on the second frame for closing and opening the fifth opening; correspondingly, a second liquid inlet is located on the bottom cover. The first filter is inserted into and removed from the inner cavity of the second frame through the fifth opening. That is, the first filter can be inserted into and removed from the second frame 2100 from the ninth opening at the top of the second filter and / or the fifth opening at the bottom of the second filter.

[0064] Furthermore, the second liquid inlet can be an opening located at the bottom of the second frame. Alternatively, the second liquid inlet may include a second protrusion located at the bottom of the second frame, extending inward toward the second frame, with its inner cavity serving as a second liquid inlet channel. When the first filter is installed into the second filter, at least a portion of the first opening of the mounting member surrounds the outer periphery of the second liquid inlet channel, so that the second liquid inlet channel communicates with the first opening. Liquid in the pool enters the inner cavity of the first filter through the second liquid inlet channel and the first opening, and is filtered by the filter cotton.

[0065] Furthermore, the second filter also includes a first baffle 2102, which is movably disposed on the second liquid inlet section. The first baffle 2102 is used to block liquid from entering the first filter from the second liquid inlet channel (i.e., the first baffle is in the closed state) and to allow liquid to enter the first filter from the second liquid inlet channel (i.e., the first baffle is in the open state). For example, the first baffle is rotatably disposed at the inner end of the second liquid inlet channel. For example, the first baffle is made of soft rubber or a hard material. When the pool cleaning robot performs cleaning of the pool bottom and walls, the first baffle is in the open state; when the pool cleaning robot performs surface cleaning, the first baffle is in the closed state.

[0066] When the pool cleaning robot only has a first filter and not a second filter, such as Figure 9A As shown, the first filter includes a first liquid inlet portion 110a, which has a first liquid inlet channel. The first liquid inlet channel can be the aforementioned first opening 1101; or the first liquid inlet portion includes a first protrusion, which is located at the bottom of the mounting member and within the first cavity, and extends upward. In this embodiment, the first filter also includes the aforementioned first baffle, which is used to block liquid from entering the first filter from the first liquid inlet channel (i.e., the first baffle is in a closed state) and to allow liquid to enter the first filter from the first liquid inlet channel (i.e., the first baffle is in an open state).

[0067] In some embodiments, the present invention provides a filtration mechanism, which may include the aforementioned first filter. Correspondingly, when the first filter is installed inside the housing of the pool cleaning robot, in one embodiment, the housing is provided with a first water inlet 101, which communicates with a first liquid inlet channel, so that liquid in the pool enters the inner cavity of the first filter through the first water inlet and the first liquid inlet channel and is filtered by the filter cotton. Alternatively, a clearance opening (not shown in the figure) is provided on the bottom of the housing. When the first filter is installed in the housing, the clearance opening exposes one end of the first liquid inlet channel, allowing liquid in the pool to enter the first filter from the first liquid inlet channel.

[0068] Alternatively, the filtration mechanism includes the aforementioned first and second filters, with the first filter housed within the second filter. Correspondingly, when the first filter is installed inside the housing of the water tank cleaning robot, in one embodiment, the housing has a first water inlet 101, which communicates with a second liquid inlet channel. The second liquid inlet channel communicates with the first liquid inlet channel, allowing liquid from the water tank to enter the inner cavity of the first filter through the first water inlet, the second liquid inlet channel, and the first liquid inlet channel, where it is filtered by the filter cotton. Alternatively, the bottom of the housing has a clearance opening. When the filtration mechanism of this embodiment is installed in the housing, the clearance opening exposes one end of the second liquid inlet channel, allowing liquid from the water tank to enter the first filter through the second liquid inlet channel and the first liquid inlet channel, where it is filtered by the filter cotton. Alternatively, the first filter is located outside the second filter.

[0069] Based on the above-described inventive concept, the embodiments of this application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can have a more detailed understanding of the contents of this application.

[0070] Please refer to Figure 1-Figure 36CIn some embodiments, the first filter includes a filter element, wherein the filter element includes a first flexible filter section and a mounting member 1100. The mounting member 1100 has a first cavity 1100a; the mounting member 1100 is provided with at least one first opening 1101 and at least one second opening 1102, both of which are connected to the first cavity; wherein the first opening 1101 is used to allow liquid to flow into the first cavity.

[0071] A second cavity 1200a is formed within the first flexible filter section 1200, and at least one third opening 1201 is provided on the first flexible filter section 1200. The first flexible filter section is provided on the mounting member so that the third opening 1201 communicates with the second opening 1102; at least a portion of the first flexible filter section 1200 is made of filter cotton to form a first filter surface for fine filtration of the liquid.

[0072] As described above, in this embodiment, the first opening 1101 of the mounting component 1100 is connected to the first water inlet of the pool cleaning robot, and the first flexible filter section is connected to the second opening 1102 of the mounting component 1100 through the third opening 1201. Thus, liquid in the pool can enter the mounting component 1100 through the first opening, then enter the second cavity of the first flexible filter section and be filtered by the filter cotton. The filtered liquid is finally discharged from the outlet of the pool cleaning robot's outer shell. Because the filter component 1200 is made of filter cotton, forming a first filter surface, its filtration accuracy is far higher than that of the first filter screen on a filter in related technologies. It can filter smaller-sized debris, thus trapping small-sized debris in the first and / or second cavities, preventing debris from being carried in the filtered liquid. This solves the problem of dust spraying from the outlet and also improves the cleaning effect of the pool cleaning robot.

[0073] In some embodiments, the first flexible filter section is entirely made of filter cotton. In other embodiments, the first flexible filter section is only partially made of filter cotton.

[0074] In some embodiments, the thickness of the flexible filter section can be 20 mm, less than 20 mm, or greater than 20 mm. The specific thickness is selected according to actual needs. For example, the thickness of the flexible filter section can be from 1 mm to 16 mm. For instance, the thickness of the flexible filter section can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, etc. The diameter of the second mesh of the first / second flexible filter section is smaller than the diameter of the first mesh of the first filter screen. The specific diameters of the second and first meshes are not limited and are selected according to actual needs. For example, the diameter of the second mesh is no greater than 110 micrometers, and the diameter of the first mesh is greater than 110 micrometers. Alternatively, the diameter of the second mesh is no greater than 100 micrometers, and the diameter of the first mesh is greater than 100 micrometers; or the diameter of the second mesh is no greater than 80 micrometers, and the diameter of the first mesh is greater than 100 micrometers; or the diameter of the second mesh is no greater than 50 micrometers, and the diameter of the first mesh is greater than 100 micrometers, etc.

[0075] In some embodiments, the mounting member 1100 is detachably connected to the first flexible filter portion. For example, the first flexible filter portion is fitted over the second opening of the mounting member through its third opening. For example, the first flexible filter portion is tightly fitted over the second opening of the mounting member; or, the first flexible filter portion is fitted over the second opening and secured to the second opening by a retaining ring or clamp.

[0076] Alternatively, in some embodiments, the mounting component is non-detachably connected to the first flexible filter section. For example, the mounting component is bonded to the first flexible filter section with adhesive. As for the adhesive, since the filter filters the liquid in the pool, the adhesive must at least have waterproof properties. For example, the adhesive can be at least one of silicone-based waterproof adhesives, polyurethane waterproof adhesives, epoxy-based waterproof adhesives, etc.

[0077] Regarding the aforementioned connection between the third opening and the second opening, in some embodiments, the third opening and the second opening are sealed together to prevent liquid carrying debris from bypassing the fine filtration of the first filter surface and flowing directly from the gap between the third opening and the second opening to the outside of the first filter, thus failing to be filtered by the second filter and being sprayed out from the outlet of the outer casing. Therefore, sealing the connection between the third opening and the second opening ensures that the liquid entering both the first and second chambers undergoes fine filtration through the first filter surface, leaving small debris inside the first filter. In other embodiments, if the filtration effect for small debris in the pool is not critical, the third opening and the second opening do not need to be sealed together; fluid communication is sufficient.

[0078] For example, in some embodiments, the filter element 1200 is mounted to the second opening 1102 of the mounting member 1100 through the third opening 1201 to achieve communication between the third opening and the second opening. For example, for a sealed communication between the third opening and the second opening, the third opening of the first flexible filter element and the second opening of the mounting member can be bonded together with adhesive, or the third opening of the first flexible filter element can be tightly fitted outside the second opening of the mounting member.

[0079] In some embodiments, the first opening 1101 and the second opening 1102 are respectively disposed on adjacent sides of the mounting member 1100. The adjacent sides are the top and side portions of the mounting member; or, the adjacent sides are the bottom and top portions of the mounting member.

[0080] In some embodiments, such as Figures 3 to 5 The first filter shown has a first opening 1101 located at the bottom of the mounting member 1100 and a second opening 1102 located on the side of the mounting member 1100. Correspondingly, the third opening of the first flexible filter part is connected to the second opening so that the third opening and the second opening are in communication.

[0081] Regarding the second opening, there can be one, or two or more second openings; the specific number is not limited and is selected according to actual needs. Correspondingly, there can be one, two, or more third openings. In some embodiments, one third opening corresponds to one second opening, meaning one third opening is connected to one second opening. Alternatively, one third opening corresponds to two second openings, meaning one third opening is simultaneously connected to two second openings. Or, one third opening can also correspond to three or more second openings, meaning one third opening is simultaneously connected to multiple second openings.

[0082] In some embodiments, such as Figure 4 and Figure 5 As shown, the mounting component 1100 includes two second openings 1102, and the first flexible filter part 1200 includes two third openings 1201. The two third openings 1201 are respectively sealed and connected to the two second openings 1102. That is, the third openings are connected to the second openings in a one-to-one correspondence. For example, the second opening 1102 and the corresponding third opening 1201 can be sealed and connected by means of adhesive bonding, sleeve fitting, fastener connection, etc.

[0083] For example, the first flexible filter section is generally U-shaped, with a third opening at each of the two ends of the U-shape. The U-shaped first flexible filter section forms a clearance area so that the first filter can be installed inside the second filter. This clearance area can avoid the middle frame 2700 of the second filter (mentioned below). Of course, in some embodiments, if the second filter does not have a middle frame, the first flexible filter section does not need to be U-shaped and can be set in other shapes. The specific shape is not limited.

[0084] For example, in some embodiments, the first flexible filter section has only one third opening, and the second cavity is a single integral structure with good sealing. Liquid entering the second cavity under the suction of the suction assembly (mentioned below) is filtered by the filter cotton, thereby trapping almost all small-sized debris within the second cavity and improving the filter's filtration efficiency. Of course, in some embodiments, in addition to one or more third openings on the first flexible filter section, other openings may also be provided.

[0085] like Figure 4 As shown, in some embodiments, the mounting element is made of a rigid material, such as a plastic or metal part.

[0086] In some embodiments, the mounting element is non-detachably connected to the first flexible filter section. For example, the third opening and the second opening are bonded together with waterproof adhesive to ensure a tight seal between the third opening and the second opening.

[0087] Alternatively, in other embodiments, the mounting member is detachably connected to the first flexible filter section. For example, the third opening of the first flexible filter section is fitted over the second opening of the mounting member, and the first flexible filter section is locked onto the mounting member using clamps or rings. Alternatively, the third opening of the first flexible filter section is provided with an elastic band, which seals the first flexible filter section onto the mounting member.

[0088] Alternatively, in some embodiments, the filter element further includes a connecting portion 1220, one end of which is disposed at the third opening of the first flexible filter element, and the other end of which is connected to the mounting element. The connecting portion is made of a non-filter cotton material, and its hardness is greater than that of the filter cotton, so as to provide support for the third opening of the first flexible filter element, thereby facilitating the connection between the connecting portion and the mounting element.

[0089] For example, the other end of the connector is fitted onto the second opening of the mounting component. For example, the connector is made of at least one of rubber, soft rubber, elastic band, etc. The other end of the connector is deformed to fit tightly onto the second opening of the mounting component. Alternatively, the connector can be made of a non-deformable material, fitted onto the second opening of the mounting component, and secured to the second opening by Velcro, clamps, or rings.

[0090] In some embodiments, the outer wall of the mounting member is provided with an outwardly protruding first flange 1104, the first flange surrounding the outer periphery of the second opening; the connecting portion is sleeved on the first flange.

[0091] Alternatively, in other embodiments, the mounting component further includes a first mounting groove 1110, which is disposed on one end of the mounting component and distributed around the second opening. The first flexible filter part and / or connecting part are inserted into the first mounting groove and glued to the first mounting groove to achieve a non-detachable connection between the mounting component and the first flexible filter part.

[0092] In some embodiments, such as Figure 3 As shown, the mounting component 1100 is also provided with a handle 1103, which allows the user to remove the first filter 1000 or place it into the second filter 2000, thereby facilitating the removal and placement of the first filter 1000. Alternatively, in some embodiments, the handle may also be provided on the first flexible filter section. Or, part of the handle may be provided on the first flexible filter section and part may be provided on the mounting component.

[0093] In some embodiments, such as Figure 1 , Figure 2 as well as Figure 6 The second filter shown includes, in addition to the aforementioned second frame, first filter screen, and second liquid inlet, a middle frame 2700 located on the bottom of the second frame 2100 and within the inner cavity of the second frame. In some embodiments, at least one second filter screen 2202 is provided on the middle frame for filtering liquid. Exemplarily, the mesh count of the second filter screen 2202 may be the same as or different from that of the aforementioned first filter screen 2201. For example, the mesh count of the second filter screen 2202 may be greater than that of the first filter screen. Alternatively, the mesh count of the second filter screen 2202 may be less than or equal to that of the first filter screen. Alternatively, no second filter screen may be provided on the middle frame.

[0094] In this embodiment, such as Figure 2 , Figure 34A , Figure 34B As shown, the inner cavity of the middle frame forms a through-flow channel. A fluid inlet 2701 is located at the lower end of the channel, and a fluid outlet 2702 is located at the upper end. The outlet is connected to the water outlet of the outer shell. The pool cleaning robot also includes a suction assembly 120 (not shown in the figure), which includes a motor 1201 and at least one impeller 1202. The motor drives the impeller to rotate, and the impeller is located within the flow channel. The flow channel is designed primarily to allow liquid filtered by the first filter and / or liquid filtered by the second filter to enter the flow channel, pass through the impeller, and then be discharged from the water outlet.

[0095] In some embodiments, when the second filter is provided with the aforementioned middle frame, the first filter is installed inside the cavity of the second filter, and the first flexible filter portion needs to avoid the middle frame. Therefore, the first flexible filter portion is generally U-shaped, and the area enclosed by the U-shape serves as a clearance area, which surrounds the outer periphery of the portion of the middle frame to avoid the middle frame. Alternatively, the first flexible filter portion may also be C-shaped, V-shaped, or annular, etc., to surround the outer periphery of the portion of the middle frame.

[0096] Furthermore, in some embodiments, the first flexible filter portion 1200 surrounds the outer periphery of the middle frame 2700, and the height of the first flexible filter portion 1200 may be slightly lower than the height of the middle frame 2700. For example, the top of the first flexible filter portion is lower than the fluid outlet of the middle frame. Alternatively, the top of the first flexible filter portion is approximately flush with the fluid outlet of the middle frame.

[0097] In other embodiments, the second filter does not have the aforementioned middle frame, so the first flexible filter section of the first filter may not be U-shaped, but may be configured in other shapes, such as barrel or column.

[0098] In some embodiments, such as Figure 2 As shown, the first opening of the mounting component is disposed on the outer periphery of the second liquid inlet portion so that the second liquid inlet channel communicates with the first opening. For example, if the second liquid inlet channel is the aforementioned second protrusion, then the first opening of the mounting component is fitted onto the outer periphery of the second protrusion.

[0099] In some embodiments, the first opening 1101 and the second opening 1102 are respectively disposed at opposite ends of the mounting member 1100. For example... Figures 7 to 9A , Figures 13 to 16 As shown, the first opening 1101 is located at the bottom of the mounting member 1100, and the second opening 1102 is located at the top of the mounting member 1100.

[0100] In some embodiments, such as Figures 7 to 9A or, Figures 13 to 16 As shown, at least a portion of the third opening is located on the bottom of the first flexible filter section, and the mounting member is located on the bottom of the first flexible filter section, providing support to at least the bottom of the first flexible filter section. For example, as... Figure 5 As shown, at least a portion of the third opening is provided on the side of the first flexible filter section, and the mounting member is provided on the side of the first flexible filter section, providing support for at least the side of the first flexible filter section.

[0101] In this embodiment, the connection between the mounting member and the first flexible filter section is, for example, that one end of the first flexible filter section 200, which has a third opening 1201, is bonded to the second opening 1102 of the mounting member. Specifically, as shown... Figure 9AAs shown, the top of the mounting component 1100 is provided with a first mounting groove 1110. The first mounting groove 1110 is located at one end of the second opening 1102 and surrounds the second opening 1102. One end of the first flexible filter part 1200, which has a third opening 1201, is inserted into the first mounting groove 1110. The first mounting groove and the bottom of the first flexible filter part are then fixedly connected by adhesive, thereby achieving a sealed connection between the second opening 1102 and the third opening 1201.

[0102] Alternatively, the first flexible filter portion can be detachably and tightly fitted outside the second opening of the mounting member to achieve a sealed connection between the second opening 1102 and the third opening 1201. Specifically, the upper end of the mounting member is provided with an outwardly extending first flange, which surrounds the outer periphery of the second opening; the first flexible filter portion is fitted onto the first flange. Alternatively, the bottom of the first flexible filter portion is provided with a connecting portion, which seals the first flange.

[0103] In this embodiment, the connection method between the mounting component and the first flexible filter part is the same as that between the mounting component and the first flexible filter part in the previous embodiment, and will not be repeated here. Please refer to the previous content.

[0104] In any of the foregoing embodiments, in order to remove the debris from the first filter, such as Figure 9A As shown, the first flexible filter section 1200 is also provided with a fourth opening 1202, which is different from the third opening. When the pool machine performs cleaning, debris remains in the first filter. Due to the fourth opening, the user can empty the debris from the first filter, preventing excessive debris from clogging the filter cotton and affecting its filtration efficiency.

[0105] For example, in some embodiments, the fourth opening 1202 is disposed opposite to the third opening 1201. Specifically, the fourth opening is disposed on the top of the first flexible filter section, and the third opening is disposed on the bottom of the first flexible filter section, so that when the pool cleaning robot is cleaning the bottom or surface of the pool, the fourth opening is always higher than the third opening. The liquid in the pool enters the second cavity through the first opening and is filtered by the filter cotton. The placement of the fourth opening does not affect the cleaning effect of the pool cleaning robot.

[0106] Alternatively, in some embodiments, such as Figure 5 As shown, when the third opening is located on the side of the first flexible filter section, the fourth opening can also be located on the top of the first flexible filter section.

[0107] In some embodiments, such as Figure 9AAs shown, the filter element also includes an end cap 1203, which is located at the fourth opening and is used to open and close the fourth opening. When it is necessary to clean or remove the debris from the first filter, the user removes the first filter from the housing and manually opens the end cap to expose the fourth opening, thereby allowing the debris inside the first filter 1000 to be discharged through the fourth opening 1202. During the cleaning process performed by the pool cleaning robot, the end cap remains closed or covers the fourth opening to prevent debris from the first filter from being discharged through the fourth opening.

[0108] In other words, when the first filter is filtering, the end cap 1203 is placed over the fourth opening 1202 to cover the fourth opening 1202. When it is necessary to clean the first filter 1000 or remove the garbage inside the first filter, the end cap 1202 can be opened to discharge the garbage inside the first filter 1000 through the fourth opening 1202.

[0109] In some embodiments, when the first flexible filter portion is provided with a fourth opening and an end cap, the fourth opening may not be provided at the top of the first flexible filter portion, but may be provided in other parts of the first flexible filter portion, but offset from the third opening.

[0110] In some embodiments, an end cap is movably disposed on the fourth opening for opening and closing the fourth opening. For example, such as Figure 7 and Figure 9A As shown, the end cap 1203 is rotatably disposed on the first flexible filter section. Alternatively, the end cap is slidably disposed on the first flexible filter section.

[0111] To prevent a gap from existing between the end cap and the fourth opening after the end cap is closed, which could allow some liquid to escape from the first filter without being filtered by the filter cotton.

[0112] Therefore, in some embodiments, the filter element further includes at least one seal 1204, which is disposed on at least one of the end cap and the first flexible filter portion. When the end cap blocks the fourth opening, the seal seals the end cap to the first flexible filter portion. The seal prevents liquid from flowing directly out of the first filter through the fourth opening 1202 without being filtered by the filter cotton.

[0113] For example, in one embodiment, a portion of the seal is disposed on the first flexible filter portion and a portion is disposed on the end cap. For example, the seal includes Velcro or a zipper. One of the loop side and the hook side of the Velcro is disposed on the first flexible filter portion, and the other is disposed on the end cap.

[0114] Alternatively, the first end of the end cap 1203 can be rotatably connected to the first flexible filter part 1200. For example, the first flexible filter part is provided with a sealing ring (or sealing strip), which is wrapped around the outer periphery of the fourth opening, and the end cap is provided with a groove that mates with the sealing ring. When the end cap closes the fourth opening, the sealing ring is embedded in the groove, and the first flexible filter part and the end cap are sealed together; when the end cap opens the fourth opening, the sealing ring separates from the groove. Alternatively, the sealing ring is provided on the end cap, and the groove is provided on the first flexible filter part.

[0115] In some embodiments, the end cap and the first flexible filter portion are made of the same material, for example, both made of filter cotton, and the first end of the end cap is integrally formed with the first flexible filter portion. Alternatively, the end cap may be made of a non-filter cotton material. It may also be made of other flexible or deformable materials, or a rigid material.

[0116] Because the first flexible filter section is made of filter cotton, the part of the first flexible filter section at the fourth opening has low strength / hardness and is easily deformed. This part is prone to collapse, which makes it inconvenient for users to open and close the end cap and will also affect the reliability of the connection between the two.

[0117] Therefore, in some embodiments, such as Figure 9A As shown, the filter element 1200 also includes at least one reinforcing member 1205, disposed on the upper part of the first flexible filter section. The reinforcement increases the strength of the first flexible filter section and also increases the strength of the portion of the first flexible filter section at the fourth opening (hereinafter referred to as the first portion for ease of description), making this first portion less prone to collapse or deformation, ensuring the reliability of the connection between the first flexible filter section and the end cap, and also facilitating the user to operate the end cap to properly open and close the fourth opening.

[0118] For example, in some embodiments, the reinforcing member 1205 is disposed on the inner wall of the first flexible filter portion and near the fourth opening. The reinforcing member 1205 is disposed circumferentially along the first flexible filter portion 1200, thereby improving the strength of the first portion of the first flexible filter portion 1200. Specifically, as... Figure 9A As shown, the reinforcing member is partially disposed on the top of the first flexible filter section and partially disposed on the side of the first flexible filter section, thereby increasing the strength of the top of the first flexible filter section.

[0119] For example, the reinforcing member 1205 can be made of a flexible material, with a hardness greater than that of the first flexible filter portion. Specifically, in one embodiment, the reinforcing member is made of rubber or soft plastic and is sewn onto the first flexible filter portion. Alternatively, the reinforcing member can be made of a rigid material. For example, the reinforcing member can be made of plastic, further increasing the strength of the upper part or the first portion of the first flexible filter portion.

[0120] In some embodiments, the first flexible filter may not have a fourth opening. For example, when the first flexible filter is detachably mounted on the mounting, the first flexible filter can be removed from the mounting when it is necessary to clean the waste in the first filter, and the waste in the first filter can be discharged from the third opening.

[0121] In some embodiments, the filter element further includes a handle 1103, which is disposed on the end cap 1203. The user can use the handle 1103 to remove the first filter 1000 and place it into the cavity of the pool cleaning robot, thereby facilitating the removal and placement of the first filter 1000. Alternatively, the handle may be disposed on the first flexible filter section.

[0122] In some embodiments, such as Figure 9B As shown, when the first liquid inlet of the first filter is a first protrusion, there is a height difference between the upper end of the first protrusion and the bottom of the second frame, thereby forming a first recessed area in the inner cavity of the first filter. If the first flexible filter part does not have the aforementioned fourth opening, when the user removes the first filter from the housing, some liquid will remain in the first recessed area, and this liquid will be difficult to drain out of the first filter.

[0123] Therefore, in some embodiments, in order to drain the liquid in the first recessed area, such as Figure 9B As shown, the first filter also includes a tenth opening 1150 and a second flexible filter section 1400; as Figure 9B As shown, the tenth opening is located at the bottom of the mounting component, connecting the first recessed area to the outside; the second flexible filter is located on the tenth opening, and at least a portion of the second flexible filter is made of filter cotton to form a second filter surface. That is, the side of the first filter includes the first flexible filter (i.e., side filtration), and the bottom of the first filter includes the second flexible filter (bottom filtration).

[0124] In this embodiment, due to the tenth opening and the second flexible filter section, when the user lifts the first filter, some of the liquid in the first recessed area is discharged out of the first filter through the second flexible filter section, thereby preventing liquid residue in the first recessed area. Simultaneously, the second flexible filter section can also perform fine filtration of the liquid, thereby increasing the filtration area of ​​the first filter and improving its filtration efficiency.

[0125] In some embodiments, such as Figure 8 and Figure 9A As shown, the first filter also includes at least one bracket 1120, a sensor, a sample to be tested, and a processor. At least a portion of the bracket is located outside the side of the filter. One of the sensor and the sample to be tested is mounted on the bracket, and the other is located inside the housing of the pool cleaning robot; the sensor is used to acquire signals from the sample to be tested; the processor determines whether the filter is properly installed inside the housing based on the sensor signals.

[0126] For example, the sensor can be a Hall sensor, and the detected component can be a magnet. The Hall sensor detects the magnetic flux signal of the magnet, and the processor uses this magnetic flux signal to determine whether the first filter is properly installed inside the housing. Alternatively, the sensor can be a position switch, and the detected component can be a trigger. The trigger actuates the position switch to open or close, generating a signal.

[0127] Specifically, in one embodiment, the bracket 1120 has a mounting hole 1121 on the side opposite to the first flexible filter section 1200, and the mounting hole 1121 is used to mount a sensor or a device to be detected.

[0128] In some embodiments, the first filter is installed inside the second filter to form a filtration mechanism, which is entirely housed within the housing, with the first opening communicating with the second liquid inlet channel. For example, the first opening of the mounting component may be located outside or around the second liquid inlet channel. Alternatively, the first opening may be sealed against the inner end face of the second liquid inlet channel. If the second liquid inlet channel is a second protrusion, since the inner end of the second protrusion is higher than the bottom of the second frame, in order to allow the first opening to be located around the second liquid inlet channel, such as... Figure 4 As shown, one end of the mounting component where the first opening is located has an upwardly recessed first clearance opening 1160. The first clearance opening communicates with the first opening and engages with the second protrusion. When the first filter is inserted into the second filter, the first clearance opening covers the outside of or abuts against the second protrusion, avoiding the first baffle so as not to affect the movement of the first baffle. The bottom of the mounting component abuts against the bottom of the second frame. This engagement method between the mounting component and the second liquid inlet channel is applicable to any of the embodiments mentioned above and below.

[0129] In some embodiments, only the first filter is placed inside the housing of the pool cleaning robot, and no second filter is installed inside the housing, in order to limit the position of the first filter inside the housing. Figure 9A As shown, the bracket 1120 is also provided with a cantilever 1122, and the end of the cantilever 1122 is provided with a buckle 1123; as Figure 35 As shown, the housing has a first boss 130 that matches the snap fastener 1123. For example, the first boss has a stepped surface 103 (i.e., a limiting surface). By engaging the snap fastener 1123 with the first boss 130, the first filter is limited within the housing, preventing the first filter 1000 from moving within the cavity. For example, the limiting surface is an inclined guide surface.

[0130] In this embodiment, when the cantilever is not subjected to external force, the swing arm is in its initial position; however, when the cantilever is subjected to external force, it can swing relative to the bracket. When the user inserts the first filter downwards into the housing, the cantilever's latch first abuts against the first protrusion and slides downwards along the first protrusion. Under the abutment of the step surface against the latch, the swing arm is forced to swing away from the first protrusion, allowing the latch to move downwards to below the limiting surface. At this point, the first protrusion removes its abutment force on the latch, and the cantilever swings back to its initial position, thus hooking the latch onto the limiting surface and limiting the first filter. Conversely, if the user lifts the first filter upwards, the latch, during its upward movement, is subjected to the abutment force of the first protrusion, causing the cantilever to swing away from the first protrusion, thus gradually disengaging the latch from the first protrusion. After the latch disengages from the first protrusion, the cantilever swings back to its initial position.

[0131] In other embodiments, the positions of the aforementioned cantilever latch and the first boss inside the housing are swapped.

[0132] In some embodiments, such as Figures 13 to 16 The first filter shown is, with Figure 9A The structures of the first filters shown are mostly the same. For example, the first opening is located at the bottom of the mounting component, the second opening is located at the top of the mounting component, and the third opening is located at the bottom of the first flexible filter section.

[0133] In some embodiments, the first flexible filter portion has only one third opening at the bottom, with no openings at other locations. Alternatively, in other embodiments, the first flexible filter portion may also have the aforementioned fourth opening and end cap, as detailed in the foregoing description.

[0134] The connection method between the mounting component and the first flexible filter section is the same as that in the previous embodiment. Please refer to the description in the previous embodiment, and it will not be repeated here.

[0135] In some embodiments, the first filter of the foregoing embodiments can be placed inside the housing for use alone. Alternatively, in some embodiments, a second filter is placed inside first, and the second filter is combined to form a filtration mechanism, which is then installed inside the housing for use.

[0136] In some embodiments, when the first filter is inserted into the second filter, the first filter can be inserted into the second filter through the aforementioned ninth opening; or, it can be inserted into the second filter through the aforementioned fifth opening. The way the mounting member mates with the second filter is the same as in any of the foregoing embodiments, as described above.

[0137] In some embodiments, such as Figures 10 to 17As shown, the second filter includes the aforementioned second frame, first filter screen, bottom cover 2400, second liquid inlet, first baffle, and fifth opening. In this embodiment, the bottom cover is rotatably or slidably mounted on the second frame, and the bottom cover is used to open and close the fifth opening 2300. The second liquid inlet is mounted on the bottom cover, and the second liquid inlet channel of the first opening and the second liquid inlet is connected. For example, as... Figure 12 As shown, when the bottom cover closes the fifth opening, the second liquid inlet channel extends into the first cavity of the mounting component and communicates with the first cavity, that is, communicates with the first opening.

[0138] For example, one end of the bottom cover 2400 is hinged to the second frame 2100. The bottom cover 2400 may be provided with a fixing shaft, and the second frame 2100 may also be provided with a fixing hole. The bottom cover 2400 can be rotatably disposed within the fixing hole via the fixing shaft. By providing the bottom cover 2400, it is convenient to open the fifth opening 2300 (e.g., Figure 10 (as shown) or obstruction (such as) Figure 11 As shown, when the first filter 1000 needs to be placed, the bottom cover 2400 can be opened so that the first filter 1000 can be placed into the second frame 2100 through the fifth opening 2300.

[0139] The fifth opening on the bottom cover serves at least two purposes. Firstly, when both a first and second filter are installed inside the housing, the fifth opening allows the user to insert the first filter into the second filter and remove the first filter from the second filter; it can also be used to drain debris from the second filter. Secondly, when a second filter is installed inside the housing without a first filter, it is used to clean the liquid in the pool. When it is necessary to clean debris from the second filter, the fifth opening on the bottom cover is opened to allow debris to drain from the second filter, thus cleaning it.

[0140] If the first filter is inserted into and removed from the second filter through the aforementioned fifth opening, in order to limit the position of the first filter within the second filter, in some embodiments, such as... Figure 12 As shown, the inner wall of the second frame is provided with an inwardly extending second flange 2103, and the side of the mounting component is provided with a second boss 1170. When the first filter is installed into the second filter, the second flange is located above the second boss and abuts against the second boss. The second flange prevents the first filter from continuing to move upward during the installation process of the second filter, that is, the second flange limits the upward movement of the first filter.

[0141] When the bottom cover closes the fifth opening, the bottom of the mounting piece (i.e., the end with the first opening) abuts against the bottom cover. This limits the bottom of the first filter, preventing it from falling out of the second filter. Therefore, with the cooperation of the bottom cover and the second flange, the position of the first filter within the second filter is limited, ensuring that once the first filter is installed in place, it cannot move up or down within the second filter.

[0142] Furthermore, in some embodiments, such as Figure 12 As shown, the mounting member 1100 has a first groove 1130 on its side, the upper sidewall of the first groove 1130 forms the aforementioned first flange 1104, and the lower sidewall of the first groove 1130 forms the aforementioned second boss.

[0143] Furthermore, in some embodiments, such as Figure 14 and Figure 17 As shown, where Figure 17 A schematic diagram of the second filter, omitting the bottom cover 2400 and the first filter screen. (See attached diagram.) Figure 14 As shown, the mounting component 1100 has at least one or more slots 1140 on its outer side wall; as Figure 17 As shown, the lower inner wall of the second frame 2100 is provided with at least one or more protruding ribs 2104, which can be inserted into the slots 1140 one by one. When the first filter is inserted into the second filter by moving upward from the fifth opening, the protruding ribs 2104 can be inserted vertically into the corresponding slots 1140, thereby guiding and limiting the insertion of the first filter into the second filter. At the same time, the arrangement of multiple protruding ribs 2104 also helps to enhance the strength of the second frame 2100. Alternatively, in some embodiments, the positions of the aforementioned slots and protruding ribs can be interchanged.

[0144] The first filter in any of the foregoing embodiments can be installed into the second filter in the manner described in this embodiment. The cooperation of the second flange and the second boss, the limiting of the first filter by the bottom cover, and the cooperation of the slot and the rib are all applicable to the cooperation of the first filter and the second filter.

[0145] In some embodiments, such as Figures 18 to 33 As shown, the first filter includes a first flexible filter section and a mounting member (or connector). The mounting member supports the first flexible filter section and has sufficient strength to facilitate the installation and disassembly of the mounting member with the second filter; or with the inner cavity of the housing. At least a portion of the first flexible filter section is made of the aforementioned filter cotton, forming a first filter surface for fine filtration of the liquid.

[0146] The difference between the first filter in this embodiment and the first filter in the previous embodiment is that in this embodiment, the connecting part of the aforementioned filter element is used as an installation part, and no separate installation part is set.

[0147] For example, in some embodiments, such as Figure 18 and Figure 19 As shown, as Figure 22A and Figure 22B As shown, Figure 23 As shown, Figure 27 and Figure 28A The first filter is shown. The mounting component includes at least a second connecting portion 1320, which is located at the lower end of the first flexible filter portion and is made of non-filter cotton to at least support the lower end of the first flexible filter portion. A first opening is located on the second connecting portion and communicates with the second cavity of the first flexible filter portion, allowing liquid to enter the second cavity through the first opening and be finely filtered by the filter cotton. The hardness of the second connecting portion is greater than that of the first flexible filter portion, thereby supporting the first flexible filter portion and facilitating the assembly of the first flexible filter portion and the second filter.

[0148] For example, the second connecting part can be made of a flexible or deformable material. For instance, the second connecting part can be made of rubber or soft rubber. For instance, the second connecting part can be sewn onto the first flexible filter part, or adhered to the first flexible filter part with waterproof adhesive. Alternatively, it can be made of other flexible or deformable materials, as long as the hardness / strength of the second connecting part is greater than that of the first flexible filter part. Alternatively, in some embodiments, the second connecting part can also be made of a non-flexible or rigid material. For example, plastic, metal, or alloy materials. For example, waterproof adhesive can be used to bond and fix the second connecting part to the first flexible filter part.

[0149] The materials and connection methods of the second connecting part and the first flexible filter part in this embodiment are the same as those of the connecting part and the first flexible filter part in any of the aforementioned embodiments.

[0150] In some embodiments, such as Figure 18 and Figure 19 As shown, as Figure 22A and Figure 22B As shown, Figure 23 As shown, Figure 27 and Figure 28A As shown, the mounting component also includes a first connecting part 1310, which is located at the upper end of the first flexible member. The first connecting part is made of non-filter cotton, and the hardness / strength of the first connecting part is greater than the hardness / strength of the first flexible filter part, thereby supporting the upper part of the first flexible filter part.

[0151] The materials of the first connecting part and the second connecting part can be the same or different. For example, one of the first connecting part and the second connecting part may be made of a flexible or deformable material, while the other may be made of a non-flexible or rigid material. Alternatively, both the first connecting part and the second connecting part may be made of flexible or deformable materials. Or, both the first connecting part and the second connecting part may be made of non-flexible or rigid materials. The material of the first connecting part and the connection method between the first connecting part and the first flexible filter part can be found in the aforementioned description of the material of the second connecting part and the fixing method between the second connecting part and the first flexible filter part, and will not be repeated here.

[0152] Alternatively, as a variation, at least one of the first connecting portion and the second connecting portion is made of filter cotton, but the thickness of the first connecting portion and / or the second connecting portion is greater than the thickness of the first flexible filter portion, so that the hardness / strength of the first connecting portion and / or the second connecting portion is greater than the hardness / strength of the first flexible filter portion, so that both the first connecting portion and the second connecting portion can support the first flexible filter portion.

[0153] For example, the first connecting part 1310 and the second connecting part 1320 can both be made of silicone or rubber, and the upper end and lower end of the first flexible filter part 1200 can be sewn onto the first connecting part 1310 and the second connecting part 1320 respectively.

[0154] In some embodiments, such as Figure 18 and Figure 19 As shown, as Figure 22A and Figure 22B As shown, Figure 23 As shown, Figure 27 and Figure 28A As shown, the first connecting part is provided with a fourth opening, which is connected to the second cavity, so that both ends of the second cavity of the second filter are connected to the outside.

[0155] For example, such as Figure 18 and Figure 19 As shown, the first filter is fitted over the second filter. The first and fourth openings facilitate the fitting of the first filter over the second filter and its removal from the second filter. In this embodiment, the liquid in the pool first enters the second filter through the second inlet channel and is coarsely filtered by the first filter screen. Then, the liquid enters the gap between the second and first filters and is finely filtered by the filter cotton of the first filter. Fine debris is retained in the inner cavity of the first filter, and finally, the filtered liquid is discharged from the outlet of the outer casing. In this embodiment, the second filter can have the aforementioned middle frame, on which the aforementioned second filter screen can be installed or not. Alternatively, the second filter may not have a middle frame.

[0156] For example, the first filter is generally annular and fits around the side of the second filter. The annulus can be circular, elliptical, square, or polygonal, among other irregular shapes. Preferably, the annulus of the first filter matches the annulus formed by the side of the second filter to minimize the gap between the first and second filters, preventing some liquid from bypassing the second filter and being discharged from the outlet of the housing without being filtered.

[0157] For example, the first connecting portion 1310 and the second connecting portion 1320 are generally annular, and the first flexible filter portion is generally annular, so as to be fitted onto the outside of the second filter 2000. Furthermore, the first flexible filter portion 1200 is also generally annular, so as to surround the outer wall of the second filter 2000 and reduce the gap between the first filter and the second filter.

[0158] In some embodiments, the first filter is fitted over the second filter and engages with the second frame via at least one of the first connecting portion and / or the second connecting portion.

[0159] For example, in some embodiments, such as Figure 19 As shown, the first connecting portion 1310 includes a first body 1311, a first flexible arm 1312, and a second flexible arm 1313. Both the first flexible arm 1312 and the second flexible arm 1313 are connected to the first body 1311. One of the first flexible arm 1312 and the second flexible arm 1313 is provided with a fixing buckle 1314, and the other is provided with a fixing groove 1315. The first flexible arm 1312 and the second flexible arm 1313 are engaged. For example, the fixing buckle 1314 can be disposed at one end of the first flexible arm 1312, and the fixing groove 1315 can be disposed at one end of the second flexible arm 1313. After the first filter 1000 is fitted onto the outside of the second filter 2000, the fixing buckle 1314 can be inserted into the fixing groove 1315 to limit or fix the first filter outside the second filter.

[0160] Furthermore, in some embodiments, at least one of the first connecting portion 1310 and the second connecting portion 1320 is provided with a fixing hole 1316, and the second frame 2100 is provided with a fixing protrusion (not shown in the figure), which is inserted into the fixing hole 1316. By inserting the fixing protrusion into the fixing hole, the stability of the connection between the first filter 1000 and the second filter 2000 is further improved, and the first filter 1000 is prevented from falling off.

[0161] Alternatively, in some embodiments, when the first filter is fitted over the second filter, the first connecting portion and / or the second connecting portion can be secured to the outside of the second filter by means of clamps or rings. Alternatively, at least one of the first and second connecting portions is made of an elastic material, and the first and second connecting portions are tightly fitted over the second filter by their own deformation.

[0162] In some embodiments, such as Figure 18 As shown, the second frame has a third liquid inlet 2160 on its side, and the third liquid inlet has a third liquid inlet channel, correspondingly, as... Figure 19 As shown, the first connecting part has a second clearance opening 1206, through which the first connecting part fits onto the third liquid inlet. When the pool cleaning robot cleans the water surface, the liquid carrying water surface debris enters the second filter from the third liquid inlet, and is coarsely filtered by the first filter screen of the second filter, and then finely filtered by the filter cotton of the first filter, so as not to affect the water surface cleaning of the pool cleaning robot.

[0163] Alternatively, in other embodiments, such as Figures 20 to 25 As shown, similar to some of the aforementioned embodiments, the first filter is disposed within the second filter.

[0164] For example, in some embodiments, such as Figure 22A and Figure 22B , Figure 23 As shown, the mounting component includes a first connecting portion 1310 and a second connecting portion 1320, and a first flexible filter portion 1200 is disposed between the first connecting portion 1310 and the second connecting portion 1320. The first filter 1000 is detachably connected to the second frame 2100 of the second filter via at least one of the first connecting portion 1310 and the second connecting portion 1320.

[0165] In some embodiments, such as Figures 21 to 24 The first connecting part is provided with a first limiting structure, and the upper end of the second frame is provided with a second limiting structure. The first limiting structure and the second limiting structure are detachably connected, so that the first filter 1000 can be detachably installed in the second filter 2000.

[0166] For example, one of the first limiting structure and the second limiting structure includes a first limiting groove 1318, and the other includes a first limiting protrusion 2120. The first limiting protrusion 2120 is inserted into the first limiting groove 1318, so that the first filter can be detachably installed in the second filter. For example, the first limiting groove 1318 is located in the first connecting portion 1310, and the first limiting protrusion 2120 is located on the upper part of the second frame 2100. Alternatively, the first limiting groove is located on the upper part of the second frame, and the first limiting protrusion is located on the first connecting portion.

[0167] In some embodiments, such as Figure 22A and Figure 22B As shown, the first connecting portion 1310 is provided with an outwardly extending first mounting flange (i.e., a second outer edge) 1317, and the upper end of the second frame 2100 is provided with a first outer edge 2110. The second outer edge overlaps the first outer edge 2110. One of the aforementioned first limiting structure and second limiting structure is provided on the first outer edge, and the other is provided on the second outer edge. Along the height direction of the first filter, the first limiting protrusion is inserted into and removed from the first limiting groove. For example, the first limiting protrusion is provided on the bottom of the second outer edge, and the first limiting groove is provided on the top of the first outer edge; or the positions of the first limiting protrusion and the first limiting groove are interchanged.

[0168] Or, such as Figure 22C As shown, the first limiting structure includes a first limiting groove, and the second limiting structure includes a first limiting groove. One side of one of the first limiting grooves serves as a first limiting protrusion, which is inserted into the other first limiting groove. That is, the two limiting grooves mutually limit each other, further enabling the second connecting part to be detachably disposed on the upper part of the second frame.

[0169] The aforementioned first outer edge may be located on the inner wall of the second frame and extend inward into the second frame so that the second outer edge overlaps with the first outer edge; or, the first outer edge may be located on the top of the second frame and extend outward so that the second outer edge overlaps with the first outer edge.

[0170] In other embodiments, the bottom of the second frame and the second connecting part are provided with a first limiting groove and a limiting protrusion, respectively. The first limiting protrusion is inserted into the first limiting groove to realize the detachable connection between the second connecting part and the bottom of the second frame.

[0171] Alternatively, in some embodiments, such as Figure 22D and Figure 21 As shown, a second limiting groove 2130 is also provided on the bottom of the second frame 2100, and the second connecting part 1320 is inserted into the second limiting groove 2130. By inserting the second connecting part 1320 into the second limiting groove 2130, a detachable connection is achieved between the bottom of the first filter 1000 and the bottom of the second filter 2000.

[0172] In the foregoing embodiments, both the first connecting portion 1310 and the second connecting portion 1320 can be made of flexible or deformable materials. For example, deformable materials include silicone or rubber. The two ends of the first flexible filter portion 1200 can be sewn onto the first connecting portion 1310 and the second connecting portion 1320, respectively. Alternatively, in other embodiments, both the first connecting portion 1310 and the second connecting portion 1320 can be made of rigid materials. For example, the rigid material is plastic. The two ends of the first flexible filter portion 1200 are glued to the first connecting portion 1310 and the second connecting portion 1320, respectively.

[0173] In some embodiments, the first flexible filter portion is generally annular, and the first connecting portion 1310 and the second connecting portion 1320 may be generally annular to surround the inner wall surface of the side portion of the second filter 2000.

[0174] In some embodiments, the aforementioned first limiting groove is not provided on the second outer edge, and the aforementioned first limiting protrusion (or first limiting groove) is not provided on the first outer edge. The first connecting part and the second frame overlap on the first outer edge through the second outer edge to achieve a detachable connection.

[0175] In some embodiments, such as Figure 23 As shown, it also includes a handle 1103, which is disposed on the first connecting part and extends horizontally inward. For example, there are two handles, which are symmetrically disposed on two side walls of the first connecting part. Alternatively, there may be one handle.

[0176] In some embodiments, such as Figures 25 to 29 The first filter shown, compared to the first filter described above, includes a second flexible filter section 1400 in addition to the aforementioned first flexible filter section, first connecting section, and second connecting section. The second flexible filter section is made of the aforementioned filter cotton to form a fine filter for the liquid. Figure 27 and Figure 28A As shown, the second flexible filter section is disposed on the second connecting part and located at the bottom of the filter element, and the aforementioned first opening is disposed on the second connecting part. The first flexible filter section serves as a side filter section 1211, and the second flexible filter section serves as a bottom filter section 1212. Both flexible filter sections can perform fine filtration of the liquid to increase the filtration area of ​​the filter element and improve the filtration effect.

[0177] The mounting component includes a first connecting portion 1310 and a second connecting portion 1320, and the filter component 1200 includes a side filter portion 1211 and a bottom filter portion 1212. The side filter portion 1211 is disposed between the first connecting portion 1310 and the second connecting portion 1320, and the bottom filter portion 1212 is disposed on the second connecting portion 1320.

[0178] Furthermore, the second connecting portion is designed to support the second flexible filter portion, such as... Figure 28B As shown, the second connecting portion includes a first side portion 1320a and a first bottom portion 1320b. The first side portion is connected to the lower part of the first flexible filter portion, and the first bottom portion has a sixth opening 2500. The second flexible filter portion is disposed on the first bottom portion and at least covers the sixth opening. While ensuring that the bottom of the second connecting portion provides support for the second flexible filter portion, the sixth opening allows filtered liquid to pass through and be discharged outside the first filter. For example, in some embodiments, the second flexible filter portion is disposed on the inner wall of the second connecting portion to block the sixth opening. Alternatively, the second flexible filter portion is disposed on the outer wall of the second connecting portion to block the sixth opening; or, the second flexible filter portion is disposed within the sixth opening.

[0179] In this embodiment, the detachable connection between the first filter and the second filter is also achieved by at least one of the first connecting part 1310 and the second connecting part 1320 being detachably connected to the second frame. The connection method can adopt the connection method between the first connecting part and the second frame and the connection method between the second connecting part and the second frame in the previous embodiment, which will not be repeated here. Please refer to the above content.

[0180] In some embodiments, since the second connecting portion includes a first side portion and a first bottom portion, the detachable connection between the second connecting portion and the second frame can be achieved by inserting the first side portion into the second limiting groove in some embodiments.

[0181] And / or, in some embodiments, the detachable connection between the second connecting portion and the second frame can also be achieved through a detachable connection between the first bottom and the second frame. For example, a third limiting structure is provided on the first bottom, and a fourth limiting structure is provided on the bottom of the second frame 2100, and the third limiting structure and the fourth limiting structure are detachably connected.

[0182] For example, such as Figure 28A , Figure 28B and Figure 29 As shown, one of the third limiting structure and the fourth limiting structure includes a second fixing post 1321, and the other includes a second fixing hole 2150. The second fixing post 1321 is inserted into the second fixing hole 2150 to achieve a detachable connection between the first bottom and the second frame.

[0183] And / or, in other embodiments, one of the third and fourth limiting structures is a limiting protrusion and the other is a limiting groove, and the limiting protrusion is inserted into the limiting groove to achieve a detachable connection between the first bottom and the second frame.

[0184] In some embodiments, one of the aforementioned first limiting structure and second limiting structure is a first limiting groove and the other is a first limiting protrusion, so as to achieve a detachable connection between the first connecting part and the upper part of the second frame.

[0185] And / or, in other embodiments, as shown in Figure 28 and Figure 29 As shown, one of the first limiting structure and the second limiting structure includes at least one first fixing post 2140, and the other includes at least one first fixing hole 1319. The first fixing post 2140 is inserted into the first fixing hole 1319 to realize the upper connection of the first connecting part 1310 and the second frame. In some embodiments, when the aforementioned filter element is fitted over the second frame, the first connecting part, the second connecting part, and the side of the second frame can all be detachably connected by the first fixing hole and the first fixing post. Alternatively, the aforementioned first outer edge and second outer edge can be provided, with the second outer edge extending inward and the first outer edge extending outward, so that the filter element is fitted over the second frame, and the second outer edge overlaps the first outer edge, facilitating the cooperation of the first limiting structure and the second limiting structure.

[0186] That is, with the cooperation of the first limiting structure and the second limiting structure, and the cooperation of the third limiting structure and the fourth limiting structure, the upper and lower parts of the first filter are respectively detachably installed in the second filter to prevent the first filter 1000 from falling out of the second filter.

[0187] In this embodiment, the first filter is inserted into and removed from the second frame through the aforementioned ninth opening on the second frame.

[0188] In some embodiments, such as Figure 29 As shown, the second frame contains the aforementioned middle frame, but the middle frame does not have a second filter screen; that is, the middle frame does not have a filtering function. Correspondingly, as... Figure 28A As shown, a second clearance hole 1322 is provided on the first bottom of the second connecting portion 1320 to allow the first filter to be installed in the second frame. The second clearance hole is arranged around the outer periphery of the middle frame to avoid the middle frame. For example, in some embodiments, the second clearance hole and the first opening are connected to form a large opening; or, in other embodiments, the second clearance hole and the first opening are not connected, the first opening is disposed outside the second liquid inlet or a portion of the first opening abuts against the inner end of the second liquid inlet, and the other portion is arranged around the outside of the second liquid inlet.

[0189] In other embodiments, when the middle frame is not provided in the second frame, the second connecting part may not be provided with a second clearance hole, and the second connecting part can be provided with a first opening.

[0190] In some embodiments, when the first filter is inserted into and removed from the second frame through the ninth opening of the second frame, further to facilitate the removal and insertion of the first filter from and into the second frame, such as... Figure 36A As shown, the second filter also includes an eighth opening 2107 and at least one first cover plate 2108. The eighth opening is located on one side of the second frame, and the ninth opening communicates with the eighth opening. The first cover plate is movably or detachably mounted on the second frame and is used to open and cover the eighth opening. When the first cover plate opens the eighth opening, the first filter is inserted into and removed from the second frame through the large opening formed by the ninth and eighth openings, facilitating user access to the first filter.

[0191] In some embodiments, the first cover plate does not have a first filter screen and therefore does not have a filtering function. Alternatively, in some embodiments, the first cover plate has an opening, and the first filter screen at least covers this opening, enabling the first cover plate to have a filtering function. When the first cover plate covers the eighth opening, the first cover plate serves as part of the second frame structure.

[0192] For example, the second frame includes a frame body, a ninth opening and an eighth opening on the frame body, and the aforementioned second liquid inlet; a first cover plate is detachably or movably disposed on the frame body to cover and open the eighth opening. That is, a receiving cavity is formed within the second frame to accommodate the first filter; or, when only the second filter is disposed within the housing, the receiving cavity is used to accommodate waste.

[0193] In some embodiments, the first cover plate is rotatably or slidably disposed on the frame body to switch between opening and blocking the eighth opening. Alternatively, the second cover plate is detachably connected to the frame body via a magnetic or snap-fit ​​structure to allow for removal or installation from the frame body as needed. Alternatively, there may be multiple second cover plates, which cooperate to open and block the eighth opening. For example, there may be two, three, or more second cover plates. For instance, when the first cover plate is rotatably disposed on the frame body, there may be two first cover plates forming a double-door structure, which, in cooperation, open and block the eighth opening.

[0194] In any of the foregoing embodiments, the first filter includes a filter element, which includes a first flexible filter section and a mounting member. The connection between the first filter and the second filter (the filter mechanism includes the first filter and the second filter) or the connection between the housing (the filter mechanism includes the first filter but does not include the second filter) is achieved through the mounting member and the second frame.

[0195] In this embodiment, such as Figure 30As shown, the first filter also includes a first frame 1330. The filter element is disposed outside or inside the first frame. The detachable connection between the first filter and the second filter or the housing is achieved by connecting the first frame and the second frame or the housing. That is, the filter element is first installed on the first frame, and then the first frame is installed inside the second frame or the housing. The aforementioned mounting components provide support for the upper and lower parts of the first flexible filter section. In this embodiment, the first frame provides support for the entire first flexible filter section, supporting a larger area of ​​the first flexible filter section.

[0196] For example, such as Figure 31 The first frame is shown, and the filter element is fitted outside the first frame (the filter element is not shown in the figure). The filter element and the first frame are detachably connected. For example, the first frame has at least one first connecting structure, and the filter element has at least one second connecting structure. The first connecting structure and the second connecting structure are detachably connected. The second connecting structure is mainly provided on the mounting component.

[0197] In some embodiments, one of the first connecting structure and the second connecting structure includes a third fixing post 1333 and the other includes a third fixing hole. The third fixing post 1333 is inserted into the third fixing hole, thereby fixing the filter element 1200 to the first frame 1330.

[0198] Specifically, the first frame 1330 includes a plurality of adjacent first sidewalls 1331 and a first bottom wall 1332, with each of the first sidewalls 1331 connected to the first bottom wall 1332. A filter element is fitted over the first frame, with its side portion detachably connected to the first sidewall and its bottom portion fitted onto the first bottom wall. For example, one of the aforementioned third fixing hole and third fixing post is located on the first sidewall, and the other on the side portion of the filter element; and / or, one of the third fixing hole and third fixing post is located on the first bottom wall, and the other on the bottom of the filter element.

[0199] Furthermore, in some embodiments, the top of the first sidewall 1331 of this embodiment is provided with an outwardly extending first flange 1334, and the first bottom wall 1332 is provided with a downwardly extending second flange 1335. The filter element 1200 is fitted outside the first frame, and the upper and lower parts of the filter element abut against the first flange 1334 and the second flange 1335 respectively, thereby using the first flange 1334 and the second flange 1335 to limit the two ends of the filter element 1200. Preferably, in this embodiment, the following is adopted: Figure 27 The filter element is shown in Figure 28. The first bottom of the second connecting part is fitted onto the first bottom wall, and the inner edge of this first bottom is blocked and limited by the second flange. The first connecting part is blocked and limited by the first flange. The first connecting part may or may not have a second outer edge.

[0200] In some embodiments, the first frame is disposed within the second frame, and is connected to the second frame by a first flange overlapping the first outer edge of the second frame. In some embodiments, the first outer edge is disposed at the top of the second frame and extends outward, and the first flange extends outward from the top of the second frame to overlap the first outer edge. Alternatively, the first outer edge is disposed on the inner wall of the second frame and extends inward; the first flange overlaps the first outer edge within the inner cavity of the second frame. In some embodiments, the detachable connection between the first flap and the first outer edge can employ the aforementioned first and second limiting structures.

[0201] Alternatively, in some other embodiments, the second frame does not have the aforementioned first outer edge, and the first flap overlaps the top opening of the second frame. The first flap and the top of the second frame are detachably connected through the cooperation of the aforementioned limiting protrusion and limiting groove.

[0202] In some embodiments, when the filter element is fitted over the first frame, the liquid in the pool first enters the inner cavity of the first frame, then is filtered by the filter element, and finally enters the second filter, where it is filtered by the first filter screen. Therefore, as... Figure 31 As shown, the bottom of the first frame is provided with an eleventh opening 1338, which is connected to the second liquid inlet channel. The liquid in the pool enters the inner cavity of the first frame through the second liquid inlet channel and the eleventh opening. In this embodiment, the mounting part is provided with a first opening, which is arranged around the outer periphery of the eleventh opening. The liquid in the pool enters the first frame through the eleventh opening, which is relative to the inner cavity of the first flexible filter part that the liquid in the pool enters through the first opening.

[0203] In some embodiments, when the aforementioned middle frame is provided within the second frame, a first clearance hole 1336 is provided at the bottom of the first frame to avoid the middle frame, and the first clearance hole 1336 is arranged around the middle frame 2700. In some embodiments, the eleventh opening 1338 and the first clearance hole 1336 are connected; in another embodiment, the eleventh opening and the first clearance hole are separated. As a variation, when the middle frame is not provided within the second frame, the first frame correspondingly does not provide the first clearance hole 1336.

[0204] In some embodiments, if the second frame is provided with the aforementioned third liquid inlet 2105 on its side, the first frame 1330 is provided with a seventh opening 1337, which is fitted outside the third liquid inlet, and the filter is provided with the aforementioned second clearance opening, which is fitted outside the third liquid inlet, thereby achieving communication between the third liquid inlet, the second clearance opening, and the seventh opening, so that the liquid carrying surface debris enters the first frame, is first finely filtered by the first flexible member, and then coarsely filtered by the first filter screen, so that the pool cleaning robot has the function of cleaning the water surface.

[0205] In some embodiments, when the first filter element is fitted over the first frame, the first frame has a handle to facilitate inserting and removing the first filter into the second filter. In some embodiments, the handle is located on the top opening of the first frame and extends inward to form a grip for the user to hold. For example, the handle is in the shape of an inverted L, with the vertical portion of the L-shape located on the top of the first frame and the horizontal portion of the L-shape extending inward to form a grip. Or, as... Figure 36B As shown, the handle is in the shape of a straight line, with one end fixed to the top of the first frame and the other end extending horizontally inward.

[0206] In some embodiments, such as Figure 36A As shown, the second frame is provided with the aforementioned ninth opening, eighth opening and first cover plate, which facilitates the removal of the first frame from the second frame and its placement into the second frame.

[0207] Similarly, in some embodiments, to facilitate the removal and installation of the first filter element from the first frame, such as... Figure 36C As shown, a first notch 1339 is provided on one side of the first frame, and the first notch communicates with the top opening of the first frame; a second cover plate 1340 is provided on the first notch. This second cover plate has a frame structure and does not have a filter screen. The second cover plate is used to open and cover the first notch. Correspondingly, a second notch is provided on one side of the filter element, and the second notch communicates with the fourth opening at the top of the filter element. A third cover plate (not shown in the figure) is provided on the second notch. The third cover plate may not have a flexible filter part with filter cotton and therefore does not have a filtering function; or it may have a flexible filter part and therefore has a filtering function. The third cover plate is used to open and cover the second notch. The second cover plate is movably or detachably connected to the first frame, and the third cover plate is movably or detachably connected to the filter element. The connection method is the same as the connection method between the first cover plate and the second frame mentioned above, and will not be repeated here. Please refer to the previous content.

[0208] Alternatively, the first frame may not have a first notch and a second cover plate, and the filter element may not have a second notch and a third cover plate.

[0209] In some embodiments, such as Figure 36A As shown, the bottom of the second frame is provided with a second liquid inlet 2101, which is a second protrusion; the inner end of the second protrusion and the bottom of the second frame form the aforementioned first recessed area. In order to increase the filtration area of ​​the filter element, as shown... Figure 36BAs shown, the bottom of the first frame is provided with a relief portion 1341 at a position corresponding to the second protrusion, so that the bottom of the first frame forms a boss portion 1342. When the first filter is installed in the second filter, the boss portion is located in the first recessed area, and the bottom of the boss portion abuts against the bottom of the first frame. The relief portion overlaps the second protrusion or fits around the outer periphery of the second protrusion. The aforementioned eleventh opening is provided in the relief portion, so that the eleventh opening is connected to the second liquid inlet channel.

[0210] In other embodiments, when the first filter includes the aforementioned first frame, the filter element may also be disposed within the inner cavity of the first frame.

[0211] The foregoing embodiments describe a first filter and a filtration mechanism including the first filter, or a filtration mechanism including a first filter and a second filter.

[0212] The following embodiment provides a pool cleaning robot, including a housing 100, a filtration mechanism, a suction assembly, and a walking mechanism as described in any of the preceding embodiments. The housing has a first mounting cavity, a first water inlet 101, and a water outlet 102. The filtration mechanism is disposed within the first mounting cavity. The first water inlet, the filtration mechanism, the first mounting cavity, the impeller of the suction assembly, and the water outlet are sequentially fluidly connected to form a cleaning water path. The first water inlet is located on the bottom of the housing.

[0213] The suction assembly includes a motor and an impeller. The motor drives the impeller to rotate, generating suction force within the first mounting cavity. This suction force drives the liquid in the pool into the filtration mechanism for filtration. After filtration, the liquid passes through the impeller and is finally discharged from the outlet. The outlet is located on the top of the housing and is in fluid communication with the impeller.

[0214] In one embodiment, if the filtration mechanism includes a first filter but not a second filter, then the first inlet is connected to the first liquid inlet of the first filter. Alternatively, in other embodiments, if the filtration mechanism includes a first filter and a second filter, then the first inlet is connected to the second liquid inlet of the second filter, so that the liquid in the pool enters the first filter through the first inlet, the second liquid inlet, and the first opening for fine filtration, and then is coarsely filtered by the second filter, with the filtered water discharged from the outlet.

[0215] In some embodiments, the housing includes the aforementioned first mounting cavity and second mounting cavity, which are spaced apart. The filter mechanism is disposed in the first mounting cavity, and the motor of the suction assembly is disposed in the second mounting cavity.

[0216] In some embodiments, if the second filter has the aforementioned middle frame, the impeller is located inside the middle frame, i.e., the impeller is located inside the first mounting cavity. The fluid outlet and water outlet of the middle frame are connected; the output shaft of the motor extends from outside the second mounting cavity into the middle frame and connects to the impeller. Under the action of the suction assembly, the liquid in the pool first enters the first filter for filtration, then undergoes coarse filtration by the second filter. The liquid filtered by the filtration mechanism enters the gap between the second filter and the first mounting cavity, then enters the middle frame through this gap, passes through the impeller, and finally exits from the water outlet. In this embodiment, the middle frame does not have a second filter screen; if the middle frame has a second filter screen, some of the liquid filtered by the first filter directly enters the middle frame after passing through the second filter screen, passes through the impeller, and exits from the water outlet. In this embodiment, the impeller is distributed within the filtration mechanism.

[0217] In other embodiments, the filter mechanism is disposed in the first mounting cavity 100a, and the impeller and motor are disposed in the second mounting cavity 100b. A flow guide shroud is disposed in the second mounting cavity, with the impeller located inside the flow guide shroud. One end of the flow guide shroud communicates with the first mounting cavity through a connecting port, and the other end communicates with the water outlet. The motor is disposed in the second mounting cavity, outside the flow guide shroud, and its output shaft extends into the flow guide shroud and connects to the impeller. In this embodiment, the impeller and the filter mechanism are staggered along the length of the outer casing.

[0218] The traveling mechanism consists of two mechanisms, each including two wheels, or two wheels with tracks wrapped around them. The aforementioned length direction of the outer casing refers to the length direction of one traveling mechanism.

[0219] In other embodiments, a second water inlet is provided on the side of the housing, which is connected to the aforementioned third liquid inlet, so that the liquid carrying the garbage on the surface of the pool can enter the first filter from the second water inlet.

[0220] As an alternative embodiment, the aforementioned first water inlet is not located on the bottom of the housing, but on the filtration mechanism. For example, the first water inlet is the aforementioned second liquid inlet. An allowance opening is provided on the bottom of the housing to expose the outer end of the second liquid inlet. The liquid in the pool first enters the first filter from the second liquid inlet and the first opening for fine filtration, and then enters the second filter for further filtration.

[0221] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0222] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0223] It should be noted that in the description of this application, the terms "first" and "second" are used only for convenience in describing different components and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.

[0224] The embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0225] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0226] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A filter, characterized in that, Includes a filter element, the filter element comprising... The first flexible filter section is at least partially made of filter cotton to form a first filter surface for fine filtration of the liquid; the first flexible filter section surrounds a second cavity; Second connecting part; It is at least located at the lower end of the second cavity and is made of non-filter cotton to at least support the lower end of the first flexible filter part; the second connecting part is provided with a first opening, through which liquid in the water tank enters the second cavity.

2. The filter according to claim 1, characterized in that, The filter element also includes The first connecting part is located at the upper end of the first flexible filter part and is made of non-filter cotton, and at least supports the upper end of the first flexible filter part.

3. The filter as described in claim 2, characterized in that, At least one of the first connecting portion and the second connecting portion is made of a flexible or deformable material; or At least one of the first connecting portion and the second connecting portion is made of a non-flexible material or a rigid material.

4. The filter according to any one of claims 1-3, characterized in that, The filter element further includes a second flexible filter section, which is at least partially made of filter cotton to form a second filter surface; The second flexible filter portion is disposed on the second connecting portion and is located at the bottom of the first filter; the first flexible filter portion is located on the side of the first filter.

5. A filtration mechanism, characterized in that, include: A first filter is used for fine filtration; the first filter is the filter according to any one of claims 1-4; The second filter is used for coarse filtration; At least a portion of the first filter is disposed within the second filter, such that the liquid first enters the first filter for fine filtration and then is coarsely filtered by the second filter.

6. The filtration mechanism as described in claim 5, characterized in that, The second filter includes: The second frame; its interior forms a third cavity; At least one first filter screen is disposed on the second frame; the mesh diameter of the first filter screen is smaller than the mesh diameter of the first flexible filter section, so that the first filter forms a fine filter and the second filter forms a coarse filter; At least one second liquid inlet channel is provided on the bottom of the second frame; The first filter is installed inside the second filter, and the first opening is connected to the second liquid inlet channel, so that the liquid enters the second cavity first through the second liquid inlet channel and the first opening.

7. The filtration mechanism as described in claim 6, characterized in that, At least a portion of the first opening is disposed around the second liquid inlet channel so that the first opening and the second liquid inlet channel are connected.

8. The filtration mechanism as described in claim 6 or 7, characterized in that, The second filter also includes The ninth opening is at least partially located on the top of the second frame; The first filter is inserted into the second frame through the ninth opening and removed from the second frame.

9. The filtration mechanism as described in claim 8, characterized in that, The second filter also includes The eighth opening is at least partially located on one side of the second frame, and the ninth opening is connected to the eighth opening; At least one first cover plate, which is detachably or movably disposed on the eighth opening, for opening and closing the eighth opening; The eighth opening is opened by the second baffle, and the first filter is removed through the eighth opening and the ninth opening.

10. A pool cleaning robot, characterized in that, include: shell; The filtration mechanism is the same as that described in any one of claims 5-9. At least a portion of the filtration mechanism is disposed within the housing; At least one water outlet is provided on the outer casing; The suction assembly is at least partially disposed within the housing; Under the action of the suction component, the liquid in the pool first enters the first filter for fine filtration, then passes through the second filter for coarse filtration and is discharged from the outlet.

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