A filtration mechanism and pool cleaning device

Abstract

This invention relates to a filtration mechanism and a swimming pool cleaning device, belonging to the technical field of swimming pool cleaning equipment. The filtration mechanism includes at least a first filter box, which includes at least a first inlet and a first outlet, with the first inlet and first outlet in fluid communication to form a first channel. At least a portion of the wall of the first filter box forms a first filtration structure, which forms the first outlet. The first filter box also includes a second inlet and a second outlet, with the second inlet and second outlet in fluid communication to form a second channel. The second channel is provided with a second opening and closing mechanism, which is movable between a first position and a second position. When the second opening and closing mechanism is in the first position, water can flow through the second channel; when the second opening and closing mechanism is in the second position, water flow is blocked from passing through the second channel, forming a water flow channel. Through the above-described design, this invention solves the defect of existing swimming pool cleaning devices where filter clogging easily leads to weakened back thrust.

Description

Technical Field

[0001] This invention relates to the field of swimming pool cleaning equipment technology, and more particularly to a filtration mechanism and a swimming pool cleaning device. Background Technology

[0002] Swimming pools generate debris such as leaves and gravel during use, requiring regular cleaning to maintain hygiene. Conventional pool cleaning systems typically use a pump to draw water into the system and then discharge it. During this process, a debris box equipped with a filter screen filters the water, trapping debris inside. The water then flows out through the filter screen and back into the pool via the pool cleaning system's outlet.

[0003] When the cleaned water is discharged from the outlet of the pool cleaning device, it provides a counter-propulsion force to the device. This is very important, as it not only affects the normal movement of the cleaning device underwater, but also largely determines whether a pool cleaning device can move along the pool wall and perform cleaning operations.

[0004] However, in existing pool cleaning devices, the filter screen of the trash can often gets clogged after a period of operation, reducing the amount of water flowing out of the filter screen. Consequently, the amount of water discharged from the outlet and the counter-propulsion force it provides also decrease. This reduces the mobility of the pool cleaning device, making it unable to maintain stability and difficult to move and clean along the pool wall. Summary of the Invention

[0005] To address the shortcomings of existing pool cleaning devices, such as filter clogging leading to reduced thrust, this invention proposes a filtration mechanism and a pool cleaning device.

[0006] The technical solution adopted in this invention is a filtration mechanism, comprising at least a first filter box, the first filter box including at least a first inlet and a first outlet, the first inlet and the first outlet being in fluid communication to form a first channel; at least a portion of the wall of the first filter box is a first filtration structure, the first filtration structure forming the first outlet; the first filter box further includes a second inlet and a second outlet, the second inlet and the second outlet being in fluid communication to form a second channel; the second channel is provided with a second opening and closing mechanism, the second opening and closing mechanism being movable between a first position and a second position; when the second opening and closing mechanism is in the first position, the second channel allows water to flow through; when the second opening and closing mechanism is in the second position, the second channel prevents water from flowing through, forming a water flow channel.

[0007] In one embodiment, the movement of the second opening and closing mechanism between a first position and a second position is based on at least one of the degree of blockage of the first outlet, the degree of tilt of the filter mechanism, or the depth information of the filter mechanism.

[0008] In one embodiment, a position sensing unit is provided at the second opening and closing mechanism, the position sensing unit being used to characterize the position of the second opening and closing mechanism.

[0009] In one embodiment, the second channel is formed as a waterproof cylindrical structure to isolate the water flow between the first channel and the second channel.

[0010] In one embodiment, the second channel is formed as a permeable cylindrical structure, allowing water to flow between the first and second channels.

[0011] In one embodiment, the second entrance is located within the range of the first entrance.

[0012] In one embodiment, the second opening and closing mechanism is located at the second inlet or the second outlet of the second channel, and the second opening and closing mechanism is a pivot baffle that can be sealed with the second inlet or the second outlet.

[0013] In one embodiment, the first inlet and the second inlet are disposed on a first surface of the filter mechanism, and the second outlet is located on a second surface of the filter mechanism that is different from the first surface.

[0014] In one embodiment, the system further includes at least one second filter box, the second filter box including at least one third inlet, the surface of the third inlet being dockably connected to the second surface, and the second outlet being dockably connected to the third inlet.

[0015] The present invention also proposes a pool cleaning device, including at least one first water inlet located at the bottom of the pool cleaning device, a first water outlet located away from the first water inlet, and the aforementioned filtration mechanism, wherein the first water inlet, the filtration mechanism, and the first water outlet form a water flow channel of the pool cleaning device.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. When the first filter structure is clogged with debris, water in the first filter box cannot flow through it into the space between the first filter box and the pool cleaning device. Instead, the water between the first filter box and the pool cleaning device is discharged by the water pump, creating a pressure difference on both sides of the second opening and closing mechanism in the second channel. When the pressure reaches the opening threshold of the second opening and closing mechanism, it moves from the second position to the first position, allowing water to flow through the second channel. Water flowing from the second outlet can be discharged from the pool cleaning device, providing sufficient counter-thrust to ensure its mobility. Even if the first filter structure is clogged, the water pump or extraction device of the pool cleaning device can still operate normally, providing sufficient counter-thrust for its normal movement, sidewall cleaning, and wall climbing. This sufficient counter-thrust reduces the possibility of the pool cleaning device tipping over or being damaged, allowing it to autonomously climb along the pool wall to the ground, facilitating user maintenance and making it convenient to use.

[0018] 2. By setting a position sensing unit at the second opening and closing mechanism, when the position sensor detects that the second opening and closing mechanism is in the first position, it can remind the user that the first filter structure of the first filter box has been blocked by garbage. The user can then command the pool cleaning device to climb up the pool wall from inside the pool and reach the ground so that the user can clean the garbage inside in time and ensure the normal use of the filter mechanism in the future; or the user can directly clean the pool cleaning device after receiving the information that it is blocked.

[0019] 3. By setting a second filter box, when the first filter structure is blocked, the water in the first filter box enters the third inlet from the second outlet, and after being filtered by the second filter box, it is discharged through the fourth filter structure, thereby making the filtration effect of the filtration mechanism better. Attached Figure Description

[0020] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of the filter mechanism in one embodiment;

[0022] Figure 2 This is a schematic diagram of the second channel;

[0023] Figure 3 This is a schematic diagram of the swimming pool cleaning system;

[0024] Figure 4 This is a schematic diagram of the filter mechanism in another embodiment;

[0025] Figure 5 This is a schematic diagram of the third opening and closing mechanism.

[0026] 10. First filter box; 11. First inlet;

[0027] 20. Second passageway; 21. Second entrance; 22. Second exit; 23. Second opening / closing mechanism;

[0028] 30. Second filter box; 31. Third inlet; 32. Third opening and closing mechanism; 33. Torsion spring;

[0029] 40. Pool cleaning equipment; 41. First water inlet; 42. First water outlet; 43. Water pump. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In one embodiment, such as Figure 1-2 As shown, a filtration mechanism installed within a pool cleaning device 40 is used to collect debris from the pool water and discharge the filtered water. The filtration mechanism includes a first filter box 10, which includes a first inlet 11 and a first outlet. The first inlet 11 and the first outlet are in fluid communication, forming a first channel. The first inlet 11 is used for water intake, and a first opening and closing mechanism is provided at the first inlet 11 to control the opening and closing of the first inlet 11, thereby controlling whether water can flow into the first inlet 11. The first opening and closing mechanism can be a pivot baffle, pressure cover, door panel, sliding door, or lifting gate, etc., that seals with the first inlet 11. The first outlet is used for water discharge. A portion of the wall of the first filter box 10 forms a first filtration structure, which serves as the first outlet. Under the action of a water pump 43 or an extraction device, pool water enters the first filter box 10 through the first inlet 11. Debris is intercepted within the first filter box 10 by the first filtration structure, and water flows out from the first filtration structure, thus enabling the first filtration structure to filter the pool water. Water flowing out of the first filter structure flows between the first filter box 10 and the pool cleaning device 40, and finally flows out of the pool cleaning device 40, providing a counter-thrust to the pool cleaning device 40.

[0032] The first filter box 10 also includes a second inlet 21 and a second outlet 22, which are in fluid communication to form a second channel 20. The second channel 20 is provided with a second opening and closing mechanism 23, which can move between a first position and a second position. When the second opening and closing mechanism 23 is in the first position, the second channel 20 allows water to flow through; when the second opening and closing mechanism 23 is in the second position, the second channel 20 blocks water from flowing through, forming a water flow channel.

[0033] Specifically, the movement of the second opening / closing mechanism 23 between the first and second positions is based on at least one of the following: the degree of blockage of the first outlet, the tilt of the filtering mechanism, and the depth of the filtering mechanism. For example, the movement of the second opening / closing mechanism 23 between the first and second positions is based on the degree of blockage of the first outlet. The second opening / closing mechanism 23 can be a pressure cap, door panel, baffle, etc. The second opening / closing mechanism 23 can be connected to the second channel 20 through a torsion spring, hinge, pivot, etc. An external force is applied to the second opening / closing mechanism 23 to drive it to overcome the elasticity of the torsion spring, thereby causing the second opening / closing mechanism 23 to flip, completing the movement from the second position to the first position and opening the second channel 20. The opening threshold refers to the magnitude of the force on the second opening / closing mechanism 23 when it moves from the second position to the first position. The torsional torque of the torsion spring can be determined by designing the elastic coefficient, stiffness, and geometric parameters (such as wire diameter, number of turns, etc.), preload, etc., which in turn affects the opening threshold of the second opening / closing mechanism 23. The geometry and size of the second opening / closing mechanism 23 also affect its opening threshold.

[0034] When the first filter structure is clogged with debris, the water in the first filter box 10 cannot pass through the first filter structure and flow between the first filter box 10 and the pool cleaning device 40. Instead, the water between the first filter box 10 and the pool cleaning device 40 is discharged by the water pump 43, creating a pressure difference on both sides of the second opening and closing mechanism 23 on the second channel 20. When the pressure reaches the opening threshold of the second opening and closing mechanism 23, the mechanism moves from the second position to the first position, allowing water to flow through the second channel 20. The water flowing out from the second outlet 22 can be discharged from the pool cleaning device 40, providing sufficient counter-thrust to ensure the movement capability of the pool cleaning device 40. Even if the first filter structure is clogged, the water pump 43 or extraction device of the pool cleaning device 40 can still operate normally, providing sufficient counter-thrust for the normal movement and climbing of the pool cleaning device 40. This sufficient counter-thrust reduces the possibility of the pool cleaning device 40 tipping over or being damaged, allowing it to autonomously climb along the pool wall to the ground, facilitating user maintenance and making it convenient to use.

[0035] Specifically, when a portion of the wall of the first filter box 10 is a first filtration structure—that is, the first filtration structure can be installed on the side wall, bottom wall, and / or top wall of the first filter box 10—the filtration of pool water can be achieved. When the first filter box 10, except for the portion containing the first inlet 11, the second inlet 21, and the second outlet 22, is entirely composed of the first filtration structure, the filtration efficiency of the first filter box 10 for pool water is even higher. The first filtration structure can be a filter screen, filter cloth, or other structures, and the mesh size of the filter screen can be designed to filter debris of different particle sizes.

[0036] In other embodiments, the second opening / closing mechanism 23 can also be slidably connected to the side wall of the first filter box 10. When the second opening / closing mechanism 23 is subjected to an external force reaching the opening threshold, the second opening / closing mechanism 23 undergoes horizontal displacement and opens the second channel 20. That is, the installation method between the second opening / closing mechanism 23 and the second channel 20 is not limited to flipping; it can also be a sliding insertion, magnetic attraction, or other connection methods that can be opened after being subjected to external force. In other embodiments, the second opening / closing mechanism 23 can also be driven to move between the first position and the second position by other driving components.

[0037] In other embodiments, the movement of the second opening and closing mechanism 23 between the first position and the second position can also be based on the tilt degree or depth information of the filter mechanism. For example, when the first filter structure is blocked by debris, the water in the first filter box 10 cannot pass through the first filter structure and flow into the space between the first filter box 10 and the pool cleaning device 40. The water cannot be discharged from the pool cleaning device 40 to provide sufficient counter-thrust force to the pool cleaning device 40. The pool cleaning device 40 tilts or floats due to insufficient grip, or rolls over when climbing the wall. Therefore, the tilt degree or depth information of the filter mechanism can be detected by other detection units to determine whether the first filter structure is blocked, thereby driving the second opening and closing mechanism 23 to move from the second position to the first position.

[0038] In one embodiment, a second filter structure may also be provided at the second outlet 22. The second filter structure can filter the water flowing out of the second channel 20, ensuring that all water passing through the filter mechanism is filtered, thereby guaranteeing both the movement capability of the pool cleaning device 40 and its filtration effect. Specifically, when the second opening / closing mechanism 23 is located at the second outlet 22, the second filter structure is positioned on the side away from the opening / closing direction of the second opening / closing mechanism 23; that is, the second filter structure is fixed between the second opening / closing mechanism 23 and the second outlet 22, preventing the second filter structure from obstructing the opening of the second opening / closing mechanism 23.

[0039] In one embodiment, a position sensing unit is provided at the second opening and closing mechanism 23. The position sensing unit is used to characterize the position of the second opening and closing mechanism 23 and determine whether the first filter structure is blocked based on the different positions of the second opening and closing mechanism 23. When the position sensor detects that the second opening and closing mechanism 23 is in the first position, it can remind the user that the first filter structure of the first filter box 10 has been blocked by debris. The user can then instruct the pool cleaning device 40 to autonomously climb up the pool wall from inside the pool so that the user can clean the debris inside in time and ensure the normal use of the filter mechanism in the future. Alternatively, the user can also directly clean the pool cleaning device 40 after receiving the information that it is blocked. This cleaning operation can be an automatic self-cleaning operation of the filter box.

[0040] In one embodiment, such as Figure 1-2 As shown, the second channel 20 is formed as a waterproof cylindrical structure to isolate the water flow between the first channel and the second channel 20. The material of the second channel 20 can be metal, plastic, rubber, etc. The second inlet 21 and the second outlet 22 of the second channel 20 are in fluid communication, and water can flow within the second channel 20. The second inlet 21 is located within the range of the first inlet 11, that is, with the surface of the first inlet 11 on the first filter box 10 as the projection surface, the projection of the second inlet 21 is within the projection range of the first inlet 11. The second opening and closing mechanism 23 is provided at the second inlet 21 and / or the second outlet 22 of the second channel 20. The second opening and closing mechanism 23 is a pivot baffle that can be sealed with the second inlet 21 or the second outlet 22. Specifically, the second inlet 21 of the second channel 20 is located inside the first filter box 10 and close to the first inlet 11, and the second outlet 22 at the other end can communicate with the outside of the first filter box 10. Pool water enters the first filter box 10 from the first inlet 11 and can flow into the second channel 20 from the second inlet 21 and out from the second outlet 22 of the second channel 20.

[0041] By setting up a second channel 20 with its second inlet 21 close to the first inlet 11, when the first filter box 10 becomes clogged to a certain extent, the water from the first inlet 11 can directly enter the second channel 20 through the second inlet 21 and quickly exit through the second outlet 22 of the second channel 20. This reduces the generation of convection, rotation, eddies, or turbulence in the first filter box 10, as well as the possibility of the water pump running dry. It also reduces resistance loss, energy consumption, and improves efficiency. The flow path is shortened, and the water discharge speed is increased, providing a normal water flow path for the pool cleaning device 40 and further ensuring the movement capability of the pool cleaning device 40.

[0042] In one embodiment, when the second inlet 21 of the second channel 20 is sealed with a pivot baffle, the second outlet 22 of the second channel 20 is open, and the second channel 20 communicates with the water flowing out of the first filter box 10 through its second outlet 22. When the first filter structure is clogged with debris, a pressure difference is formed inside and outside the first filter box 10. The baffle is opened under the pressure reaching the opening threshold, and water flows out of the first filter box 10 from the second channel 20. Thus, the blockage of the first filter box 10 does not affect the smooth flow of water inside the machine, and it can still provide a counter-thrust for the pool cleaning device 40.

[0043] In one embodiment, when the second outlet 22 of the second channel 20 is sealed with a pivot baffle, water flows in from the first inlet 11 of the first filter box 10. At this time, the water flowing in from the first inlet 11 can be discharged from the first filter structure, so the second inlet 21 remains sealed. When the first filter structure of the first filter box 10 is blocked, water is difficult to discharge from the first filter structure. At this time, a pressure difference is formed inside and outside the first filter box 10. The baffle is opened under the pressure of reaching the opening threshold, and the water flows out of the first filter box 10 from the second channel 20, and further flows out of the cleaning device 40 from the first outlet 42, ensuring the mobility of the pool cleaning device 40, especially providing the wall-adhering ability of the cleaning device 40 when cleaning the pool wall.

[0044] In one embodiment, when both ends of the second channel 20 are sealed with pivot baffles, similarly, when the first filter structure is blocked, a pressure difference will be formed on both sides of the baffle. When the forces on the two baffles reach their opening thresholds in sequence, the two baffles will be opened in sequence.

[0045] In one embodiment, the second channel 20 is formed as a permeable cylindrical structure, allowing water to flow between the first channel and the second channel 20. Specifically, the sidewall of the second channel 20 employs a third filtration structure. When a baffle is installed at the second outlet 22 of the second channel 20, water enters the first filter box 10 from the first inlet 11. The water in the first filter box 10 flows out of the pool cleaning device 40 and further flows out of the cleaning device 40 from the first outlet 42. When the first filtration structure is blocked, water cannot flow out of the first filtration structure. With the continuous action of the water pump 43, an increasingly larger pressure difference gradually forms inside and outside the first filter box 10, and a corresponding pressure difference also forms on both sides of the baffle. When the baffle is subjected to force reaching the opening threshold, it will be opened, that is, the second outlet 22 of the second channel 20 is opened. At this time, the water stored in the first filter box 10 and the water flowing in from the second inlet 21 can both flow out from the second outlet 22 of the second channel 20 and further flow out of the cleaning device 40 from the first outlet 42. The sidewall of the second channel 20 adopts a third filtration structure, which allows the water stored in the first filter box 10 to flow into the second channel 20 through the third filtration structure, thereby increasing the water intake of the second channel 20 and ensuring that the water flow pumped by the water pump 43 is sufficient, thus ensuring that sufficient counter-thrust is provided for the pool cleaning device 40.

[0046] Furthermore, when the pore size of the third filter structure is larger than that of the first filter structure, the third filter structure can only filter coarser debris, reducing the risk of clogging in a short time and ensuring that the water pump 43 delivers sufficient water flow. In other embodiments, the pore size of the third filter structure can also be smaller than or equal to that of the first filter structure. In either case, when water cannot flow out of the first filter structure, it can be discharged through the second channel 20, providing a counter-thrust for the pool cleaning device 40.

[0047] In other embodiments, when a baffle is installed at the second inlet 21 of the second channel 20, and when the first filtration structure is not blocked, water flows into the first filter box 10 from the first inlet 11. A portion of the water passes through the third filtration structure and enters the second channel 20, eventually flowing out, while the remaining water passes through the first filtration structure and flows out. If the first filtration structure is blocked, the baffle at the second inlet 21 is opened by an external force reaching the opening threshold due to the pressure difference. The second channel 20 can then discharge water, providing a counter-thrust to the pool cleaning device 40 and ensuring its mobility.

[0048] In one embodiment, both the second inlet 21 and the second outlet 22 of the second channel 20 are sealed with pivot baffles. Similarly, when the first filter structure is blocked, the baffle of the second outlet 22 is opened by an external force reaching the opening threshold under the action of the pressure difference. When the third filter structure is blocked, the baffle of the second inlet 21 is opened by an external force reaching the opening threshold under the action of the pressure difference, and the second channel 20 can also discharge water, providing a counter-thrust for the pool cleaning device 40.

[0049] In one embodiment, pivot baffles are sealed at both the second inlet 21 and the second outlet 22 of the second channel 20, with the opening threshold of the baffle at the second inlet 21 being lower than that of the baffle at the second outlet 22. When the first filtration structure is in normal use, the baffle at the second inlet 21 of the second channel 20 is opened under relatively low water pressure, allowing water to enter the second channel 20 and the first filter box 10 from the second inlet 21 and the first inlet 11, respectively. Water in the second channel 20 also enters the first filter box 10 through the third filtration structure. When the first filtration structure is gradually clogged, the pressure difference across the baffle at the second inlet 21 decreases, causing the baffle to tend to close. As the water pressure difference inside and outside the first filter box 10 increases, the baffle at the second outlet 22 is subjected to force that reaches the opening threshold, and the baffle at the second outlet 22 is opened. Then, the pressure difference is transmitted to the baffle at the second inlet 21 through the second channel 20, so the baffle at the second inlet 21 is also opened. Water flows out through the second inlet 21, the second channel 20, and the second outlet 22 in sequence, and is then driven out of the pool cleaning device 40 by the water pump 43, providing a counter-thrust force for the pool cleaning device 40.

[0050] In one embodiment, both ends of the second channel 20 are sealed with pivot baffles, and the opening threshold of the baffle at the second outlet 22 is less than the opening threshold of the baffle at the second inlet 21. When the first filter structure is in normal use, the baffle at the second outlet 22 of the second channel 20 is opened under relatively low water pressure, allowing water to flow out of the first filter box 10 from both the first and third filter structures. When the first and third filter structures become gradually clogged, the pressure difference across the baffle at the second inlet 21 increases. When the baffle reaches the opening threshold, it opens the second inlet 21 of the second channel 20, allowing water to flow out through the second inlet 21, the second channel 20, and the second outlet 22. The water is then driven out of the pool cleaning device 40 by the water pump 43, providing a counter-thrust force to the pool cleaning device 40. In this embodiment, the third filter structure can filter the pool water in the early stages, increasing the filtration speed and improving the cleaning efficiency of the pool cleaning device 40.

[0051] In one embodiment, the first filter box 10 has multiple second channels 20 on its sidewall. The multiple second channels 20 can provide multiple backup drainage paths for the first filter box 10. When the first filter structure is blocked, it can better ensure that the water in the first filter box 10 can be discharged, providing a counter-thrust force for the pool cleaning device 40, which facilitates the normal operation of the pool cleaning device 40 in certain specific movement states, such as sidewall cleaning, wall climbing, etc., and helps maintain and repair the pool cleaning device 40.

[0052] In one embodiment, the second inlet 21 is located within the range of the first inlet 11, eliminating the need for an additional opening for the second inlet 21 on the first filter box 10, thus simplifying the construction of the filtration mechanism and saving production costs.

[0053] In one embodiment, the first inlet 11 and the second inlet 21 are disposed on the first surface of the filtration mechanism, and the second outlet 22 is located on a second surface of the filtration mechanism that is different from the first surface. This prevents the water flowing out of the second outlet 22 from colliding with the water near the first inlet 11 / second inlet 21, which would interfere with the normal flow of water and cause energy waste.

[0054] In one embodiment, such as Figure 4 As shown, the system also includes a second filter box 30. At least a portion of the sidewall of the second filter box 30 is a fourth filtration structure. One sidewall of the second filter box 30 has a third inlet 31 for water inlet. The surface containing the third inlet 31 can be connected to the second surface, and the second outlet 22 can be connected to the third inlet 31. When the first filtration structure is clogged, water in the first filter box 10 enters the third inlet 31 through the second outlet 22, is filtered by the second filter box 30, and is discharged through the fourth filtration structure, thereby improving the filtration effect of the filtration mechanism. Furthermore, the second outlet 22 and the third inlet 31 are sealed together, meaning that all water discharged from the second outlet 22 will enter the second filter box 30 through the third inlet 31, thus ensuring that all water discharged from the filtration mechanism is filtered water, guaranteeing the cleanliness of the filtration mechanism.

[0055] The volume of the second filter box 30 can be much smaller than that of the first filter box 10 to avoid taking up too much space in the pool cleaning device 40. When the first filter box 10 is clogged, an alarm will be issued. At this time, the second filter box 30 can be understood as a buffer filter box, in order to provide a counter-propulsion for the machine's recall process while ensuring the cleaning effect.

[0056] In one embodiment, such as Figure 5As shown, a third opening and closing mechanism 32 is also provided on the second surface of the first filter box 10. The third opening and closing mechanism 32 can be a door panel that cooperates with the top wall of the first filter box 10 via a torsion spring 33. The third opening and closing mechanism 32 can be used to open and close the fluid channel between the second outlet 22 and the third inlet 31. Specifically, when the door panel is closed, it can seal the second outlet 22 / third inlet 31; when the door panel is open, it can open the second outlet 22 and the third inlet 31.

[0057] In one embodiment, the second opening / closing mechanism 23 and / or the third opening / closing mechanism 32 can be configured to control opening and closing under the action of a gravity block. The gravity block can be disposed in a groove on the door panel of the opening / closing mechanism. For example, when the machine tilts or flips, the gravity block can move in the groove to open the door panel. This is particularly suitable for the machine during wall climbing or side wall cleaning, as it can prevent rollover caused by insufficient back thrust of the cleaning device due to filter box clogging.

[0058] In one embodiment, the second filter box 30 is provided with a third channel with the same structure as the second channel 20, so that even if the fourth filter structure of the second filter box 30 is blocked, water can still flow out from the third channel, ensuring the movement capability of the pool cleaning device 40.

[0059] In other embodiments, a third filter box may also be provided for cleaning the water flowing out from the third channel.

[0060] The second, third, and fourth filtration structures can all be made of filter screens, filter cloths, etc., and different particle sizes of waste can be filtered by designing the mesh size of the filter screen.

[0061] In one embodiment, such as Figure 3 As shown, a swimming pool cleaning device 40 includes the aforementioned filtration mechanism. The device also includes a first inlet and a first outlet 42 located away from the first inlet 41. The first inlet 41, the filtration mechanism, and the first outlet 42 form a water flow channel for the swimming pool cleaning device 40. Pool water sequentially passes through the first inlet and the first inlet 11 / second inlet 21 / third inlet 31 before entering the filtration mechanism, then flows out of the filtration mechanism via the first outlet / second outlet 22 / third outlet, and finally flows out of the swimming pool cleaning device 40 via the first outlet 42. The structure of this embodiment ensures the mobility and cleaning ability of the swimming pool cleaning device 40, reduces the possibility of tipping over and damage, allows it to autonomously climb along the pool wall to the ground, facilitates user maintenance, and provides convenient use.

[0062] In other embodiments, the pool cleaning device 40 may also include other inlets for other purposes.

[0063] In one embodiment, the pool cleaning device 40 also includes a body, a filter mechanism located inside the body, and a water pump 43 installed inside the body. When the first filter structure is blocked, the baffle is subjected to negative pressure by the water pump 43 until the opening threshold is reached, thus ensuring the movement and cleaning capabilities of the pool cleaning device 40.

[0064] In the description of this specification, the use of terms such as "Embodiment 1," "this embodiment," or "in one embodiment" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0065] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In the description of this specification, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can easily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this invention and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this invention; ② Equivalent substitutions of some features of the technical solution of this invention using known technology, resulting in the same technical effects as those of this invention; ③ Extendable technical solutions based on the technical solution of this invention, where the substantive content of the extended technical solution does not exceed the technical solution of this invention; ④ Equivalent transformations made using the content of this specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. A swimming pool cleaning device, comprising at least one first water inlet disposed at the bottom of the swimming pool cleaning device, and a first water outlet located away from the first water inlet, characterized in that, The pool cleaning device also includes a filtration mechanism; The filtration mechanism includes at least a first filter box, the first filter box includes at least a first inlet and a first outlet, the first inlet and the first outlet are in fluid communication to form a first channel; At least a portion of the wall of the first filter box is a first filter structure, and the first filter structure is formed as the first outlet; The first filter box further includes a second inlet and a second outlet, the second inlet and the second outlet being in fluid communication to form a second channel; The second channel is provided with a second opening and closing mechanism, which can move between a first position and a second position; when the second opening and closing mechanism is in the first position, the second channel can be used for water flow. When the second opening and closing mechanism is in the second position, the second channel prevents water flow from forming a water flow channel; The second entrance is located within the area of ​​the first entrance; The first water inlet, the filter mechanism, and the first water outlet form the water flow channel of the pool cleaning device.

2. The swimming pool cleaning device according to claim 1, characterized in that, The movement of the second opening and closing mechanism between the first position and the second position is based on at least one of the degree of blockage of the first outlet, the degree of tilt of the filter mechanism, or the depth information of the filter mechanism.

3. The swimming pool cleaning device according to claim 1, characterized in that, A position sensing unit is provided at the second opening and closing mechanism, and the position sensing unit is used to characterize the position of the second opening and closing mechanism.

4. The swimming pool cleaning device according to claim 1, characterized in that, The second channel is formed as a waterproof cylindrical structure to isolate the water flow from the first channel and the second channel.

5. The swimming pool cleaning device according to claim 1, characterized in that, The second channel is formed as a permeable cylindrical structure, allowing water to flow between the first and second channels.

6. The swimming pool cleaning device according to claim 1, characterized in that, The second opening and closing mechanism is located at the second entrance or the second exit of the second channel, and the second opening and closing mechanism is a pivot baffle that can be sealed and fitted with the second entrance or the second exit.

7. The swimming pool cleaning device according to claim 1, characterized in that, The first inlet and the second inlet are disposed on the first surface of the filter mechanism, and the second outlet is located on the second surface of the filter mechanism, which is different from the first surface.

8. The swimming pool cleaning device according to claim 7, characterized in that, It also includes at least one second filter box, the second filter box including at least one third inlet, the surface where the third inlet is located being docked to the second surface, and the second outlet being docked to the third inlet.

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