Drainage device of swimming pool cleaning robot

Abstract

The embodiment of the utility model provides a drainage device for a swimming pool cleaning robot, and the drainage device comprises a mounting base which is provided with an impeller; the impeller cover is used for containing the impeller and comprises a mounting part and a flow guide part, the mounting part is mounted on the mounting base, the flow guide part is used for guiding the outflow direction of water, and the mounting part and the flow guide part are connected through a connecting part to form a water inlet; the flow guide part is grid-shaped and is obliquely arranged to form a water outlet; and when the mounting part and the mounting base are mounted in place, the direction of the impeller cover is fixed. Through the scheme of the embodiment of the invention, the problem of how to effectively discharge water filtered by the swimming pool cleaning robot can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of swimming pool cleaning robots, and in particular to a drainage device of a swimming pool cleaning robot. Background Art

[0002] The drainage system of a pool cleaning robot is primarily used to effectively drain filtered water from the robot, ensuring the pool's water remains clean and clear. However, in actual use, effectively draining the filtered water from the robot becomes a critical technical issue. This not only affects water circulation efficiency but also directly impacts the pool's cleaning performance and the robot's operating efficiency. Poor drainage can lead to filter blockage or uneven water flow, compromising overall cleaning effectiveness. Summary of the Invention

[0003] In view of this, an embodiment of the present disclosure provides a drainage device for a swimming pool cleaning robot, which at least partially solves the problems existing in the prior art.

[0004] The present application provides a drainage device for a swimming pool cleaning robot, comprising:

[0005] A mounting base on which an impeller is disposed;

[0006] The impeller cover is used to accommodate the impeller and includes a mounting portion and a guide portion, wherein the mounting portion is mounted on the mounting base, and the guide portion is used to guide the outflow direction of water, wherein

[0007] The installation portion and the guide portion are connected by a connecting portion to form a water inlet;

[0008] The guide portion is grid-shaped and inclined to form a water outlet; and

[0009] When the mounting portion and the mounting base are mounted in place, the orientation of the impeller cover is fixed; wherein

[0010] The swimming pool cleaning robot is provided with a first water entry detection sensor, a second water entry detection sensor and a third water entry detection sensor, wherein the position of the first water entry detection sensor is lower than that of the third water entry detection sensor, and the position of the second water entry detection sensor is forward than that of the first water entry detection sensor, and when the second water entry detection sensor or the third water entry detection sensor does not detect water entry, the impeller is powered off.

[0011] In a specific embodiment, the mounting portion is connected to the mounting base via a snap-fit ​​connection.

[0012] In a specific embodiment, the upper edge of the water inlet is lower than the lower edge of the impeller to improve suction efficiency.

[0013] In a specific embodiment, the length of the guide portion is not less than 40 mm to improve the directionality of the water flow.

[0014] In a specific embodiment, the guide portion is circular and includes multiple circles of flow channels surrounding the axis.

[0015] In a specific embodiment, the outer side of the guide portion is provided with raised patterns to improve the directionality of the water flow.

[0016] In a specific embodiment, a reinforcing rib is provided on the outer side of the connecting portion.

[0017] In a specific embodiment, a protective grille is provided between the connecting parts.

[0018] In a specific embodiment, water flows into the water inlet through a filter screen and is discharged by the impeller, and the top height of the filter screen is higher than the bottom height of the water inlet.

[0019] In a specific embodiment, a magnet is provided at the bottom of the impeller cover.

[0020] The present disclosure provides a drainage device for a pool cleaning robot. The drainage device includes: a mounting base on which an impeller is mounted; an impeller cover for accommodating the impeller and comprising a mounting portion and a guide portion, wherein the mounting portion is mounted on the mounting base; the guide portion is configured to direct the outflow of water; the mounting portion and the guide portion are connected by a connecting portion to form a water inlet; the guide portion is grid-shaped and tilted to form a water outlet; and when the mounting portion and the mounting base are mounted in place, the impeller cover is fixed in position. The solutions of the present disclosure can effectively drain water filtered by the pool cleaning robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the exemplary implementation methods of the embodiments of the present disclosure, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The overall structure of the swimming pool cleaning robot of this application;

[0023] Figure 2 A diagram showing the drainage device for this application in its installed state;

[0024] Figure 3 This is a schematic diagram of the structure of the drainage device of this application;

[0025] Figure 4 This is a schematic structural diagram of the drainage device of this application.

[0026] In the figure: 100, swimming pool cleaning robot; 110, housing; 120, flow channel structure; 130, filtering structure; 140, drainage device; 150, driving mechanism; 160, walking mechanism; 170, cleaning brush; 1, mounting base; 2, impeller; 3, impeller cover; 4, first water inlet detection sensor; 5, second water inlet detection sensor; 6, third water inlet detection sensor; 31, mounting portion; 32, flow guide portion; 33, flow guide portion; 34, water inlet; 35, water outlet; 36, raised pattern; 37, reinforcing rib; 38, protective grille DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure are further described in detail below in combination with the embodiments and drawings. The schematic implementation methods of the embodiments of the present disclosure and their descriptions are only used to explain the embodiments of the present disclosure and are not intended to limit the embodiments of the present disclosure.

[0028] First, refer to Figure 1 , describes the overall structure of the swimming pool cleaning robot 100 of the present application. Figure 1 As shown, the swimming pool cleaning robot of the present application includes a housing 110 , a flow channel structure 120 , a filtering structure 130 , a drainage device 140 , a driving mechanism 150 , a walking mechanism 160 and a cleaning brush 170 .

[0029] The housing 110 is the main structure of the pool cleaning robot, and is internally provided with a flow channel structure 120. The flow channel structure 120 is a water flow channel, and a filter structure 130 is provided in the flow channel structure 120 to filter the water flowing through the flow channel structure 120. The drainage device 140 is also provided in the flow channel structure 120 and provides power to discharge the filtered water out of the flow channel structure 120, thereby filtering the water in the pool. The pool cleaning robot of the present application is provided with a cleaning brush 170 that can rotate to clean the pool bottom or pool walls, and the drive mechanism 150 is responsible for driving the walking mechanism 160 and the cleaning brush 170 to clean the pool during the walking process.

[0030] In the present application, the shell 110 can be made of plastic and has a cavity inside to accommodate a filtering structure 130 such as a filter screen. Impurities cleaned by the cleaning brush 170 enter the flow channel structure 120 through, for example, a water inlet at the bottom of the pool cleaning robot, and are then filtered through the filter screen. The filtered water is then discharged from the top of the pool cleaning robot 100 using a drainage device 140 such as a spiral mechanism, while impurities and the like are retained in the filter screen to achieve the cleaning operation of the pool.

[0031] Next, refer to Figure 2 , describing a drainage device 140 of a pool cleaning robot 100 of the present application, comprising a mounting base 1, an impeller 2, an impeller cover 3, and other components. This device is installed inside the pool cleaning robot and works in conjunction with the housing 110, flow channel structure 120, filter structure 130, drive mechanism 150, travel mechanism 160, and cleaning brush 170 to achieve pool cleaning.

[0032] Specifically, mounting base 1 is used to secure the entire drainage device 140. It features a smooth surface, ensuring stability during operation. Impeller 2 is mounted on mounting base 1. The rotation of impeller 2 generates negative pressure, drawing water through flow channel structure 120 and filtering it through filter structure 130. Impeller 2 is designed in a spiral or blade-like shape to efficiently draw and drain water during rotation.

[0033] Specifically, if Figure 3 As shown, the impeller cover 3 is an important component that wraps the impeller 2. It not only protects the impeller 2 from interference from external debris, but also guides the direction of water flow. The impeller cover 3 includes two parts: a mounting portion 31 and a guide portion 32. The mounting portion 31 is fixed on the mounting base 1. Its structure is a circular boss, which is fixed by screws or other fasteners to ensure that the impeller cover 3 is tightly connected to the mounting base 1 to prevent water leakage. The guide portion 32 is located at the front end of the impeller cover 3, is grid-shaped, and is tilted to ensure that the direction of water flow is toward the water outlet 35. The design of the grid helps to reduce the flow resistance of water. The mounting portion 31 and the guide portion 32 are connected by a connecting portion 33. The structural design of the connecting portion 33 allows the water to flow smoothly into the interior of the impeller cover 3 from the water inlet 34, further improving the smoothness of the water flow.

[0034] In the present application, the mounting portion 31 is fixedly connected to the mounting base 1 via a snap-fit ​​connection, and the orientation of the impeller cover 3 is fixed when installed in place. This is because the direction of drainage is crucial for a pool cleaning robot. On the one hand, it needs to spray water backward to propel the robot forward through the recoil force. On the other hand, when the robot is cleaning the wall, it also needs to spray water upward to press the robot against the wall through the recoil force to achieve cleaning. This means that when installed in place, the orientation of the inclined guide portion 32 must be fixed, that is, facing backward and upward, so that it can provide forward momentum and downward force at the same time. Therefore, in the present application, the mounting portion 31 is fixed to the mounting base 1 by a snap-fit ​​connection to avoid the situation where the orientation of the guide portion 32 is not fixed when connecting using threads or other methods.

[0035] Specifically, the mounting base 1 is typically made of high-strength materials, such as stainless steel or engineering plastics, to withstand the forces generated by the operation of the impeller 2. The impeller 2 can be made of wear-resistant materials, such as plastic or metal, to ensure efficient pumping performance even after extended operation. The impeller guard 3 is also made of corrosion- and wear-resistant materials to accommodate potential chemicals and mechanical stresses in the water. The mounting base 1 and impeller guard 3 can also be attached using snap-fits, threads, or fasteners to ensure a secure and reliable connection between the components.

[0036] In addition, to further enhance the system's intelligence and safety, the pool cleaning robot is equipped with multiple water ingress detection sensors: a first water ingress detection sensor, a second water ingress detection sensor, and a third water ingress detection sensor. The first water ingress detection sensor is positioned lower than the third water ingress detection sensor, while the second water ingress detection sensor is located in front of the first water ingress detection sensor. If the second or third water ingress detection sensors fail to detect water flow, the system automatically cuts off power to impeller 2, preventing damage to the device during dry operation.

[0037] Specifically, for example, the first water entry sensor can be arranged at a position near the bottom of the shell 110, specifically, in the present application, it is arranged on the surface of the internal control cabin; the second water entry sensor can also be arranged on the surface of the control cabin, but it is closer to the front of the robot 100 than the first water entry sensor, and the position of the third water entry sensor is higher than the position of the first water entry sensor, for example, it can be arranged on the top of the shell 110. In this way, when the second water entry sensor and the third water entry sensor do not detect water entry, the robot 100 may still be on the shore. At this time, even if the robot 100 is turned on, the impeller 2 does not rotate; similarly, when the second water entry sensor does not detect water entry and the third water entry sensor detects water entry, the robot may be cleaning the side wall and the front has already protruded out of the water. At this time, the machine will adjust the working logic accordingly, such as retreating underwater or turning on the waterline cleaning mode. By monitoring the water entry status and controlling whether the motor is working, the following two problems can be effectively solved. First, when the impeller 2 motor rotates at high speed in the air, it is easy to be damaged due to heat. Second, if it rotates in the air, for example, during maintenance, if the maintenance personnel's fingers penetrate into the impeller 2, it may also cause damage.

[0038] That is to say, in the present invention, the stable support provided by the mounting base 1 ensures the working reliability of the entire device. Secondly, the negative pressure generated by the spiral or blade design of the impeller 2 during high-speed rotation causes the water to flow in from the water inlet at the bottom of the shell. The grid-shaped guide portion 32 and the inclined setting of the impeller cover 3 effectively guide the water flow, so that the filtered water can be smoothly discharged from the water outlet 35, ultimately ensuring that the entire cleaning process is efficient and thorough, and avoiding the problem of filtered water re-contaminating the swimming pool due to poor drainage. At the same time, the position design of the three water inlet sensors can prevent the motor of the impeller 2 from running dry and can avoid harming maintenance personnel. Therefore, while ensuring that the water flow path is unobstructed, the drainage device greatly improves the working efficiency and service life of the swimming pool cleaning robot.

[0039] In one embodiment, Figure 4As shown, the mounting portion 31 of the drainage device of a swimming pool cleaning robot of the present application is connected to the mounting base 1 by a snap-fit ​​connection. This design simplifies the installation and disassembly process and improves the convenience of maintenance and inspection. Specifically, the inner wall and outer side of the inner cavity of the mounting portion 31 contain several protruding structures, and the corresponding positions of the mounting base 1 are installed with corresponding recessed structures. When installing, the protruding structure is aligned with the recessed structure to press the mounting portion 31 downward so that the mounting portion 31 is initially combined with the mounting base 1. Then, the mounting portion 31 is rotated so that the protrusion on the mounting portion 31 rotates along the recessed structure to abut parallel to the protrusion on the mounting base 1. When it is rotated to the bottom of the recessed structure, the orientation of the impeller cover 3 can be fixed. This snap-fit ​​connection method is not only simple in structure, but also has the advantages of good stability and easy operation.

[0040] In one embodiment, Figure 3 As shown, the upper edge of the water inlet 34 of the drainage device of a pool cleaning robot of the present application is lower than the lower edge of the impeller 2. That is, when the impeller cover 3 is in place, the impeller 2 cannot be seen from the front, that is, the impeller 2 is completely covered by the guide portion 32. This design ensures that water can flow more smoothly into the drainage device and effectively improves suction efficiency. This is because the rotation of the impeller 2 will discharge water outward. If the upper edge of the water inlet 34 is higher than the lower edge of the impeller 2, some water will be discharged through the water inlet 34, thereby reducing drainage efficiency.

[0041] Specifically, a certain vertical distance can be maintained between the water inlet 34 and the impeller 2. This distance design ensures that the water level at the water inlet 34 is lower than the lowest point of the impeller 2. This reduces the amount of water discharged from the water inlet 34 when the water flows into the drainage device, ensuring the continuity and stable suction of the water flow. For example, the upper edge of the water inlet 34 can be set 5 to 10 mm below the lowest point of the impeller 2. This height difference can effectively optimize the fluid dynamics performance, allowing the water flow to obtain sufficient pre-acceleration before entering the impeller 2, further improving drainage efficiency.

[0042] In one embodiment, in a drainage device for a pool cleaning robot according to the present application, the length of the guide portion 32 is no less than 40 mm, which helps improve the directionality of the water flow. Specifically, the guide portion 32 is a key component located near the drain outlet. Its main function is to guide the discharged water in a specified direction, reducing water scattering and waste during the discharge process. The guide portion 32 is typically installed at the outlet of the drain pipe, forming a continuous flow channel. The length of this component determines the degree of guidance provided to the water flow during the discharge process. By designing the length of the guide portion 32 to be no less than 40 mm, the directionality and concentration of the water flow can be significantly improved, ensuring a more consistent direction of water flow when it flows out. If the length of the guide portion 32 is too long, the turbulent flow caused by the agitation of the impeller 2 will not pass through the guide portion 32 to form a more consistent directional flow, thereby reducing the directionality. Specifically, the directionality of the discharge toward the rear and upward direction is reduced, reducing the robot's forward momentum and its ability to climb walls (when climbing walls, it mainly relies on the downward pressure of the water flow).

[0043] In another embodiment, Figure 3 As shown, the guide portion 32 in the drainage device of a swimming pool cleaning robot of the present application is circular and includes three circles of flow channels, which are evenly distributed around the axis. However, it should be understood that the guide portion 32 can also include more circles of flow channels, and the shape of the guide portion 32 is not limited to a circle, and can also be other shapes such as a rectangle. This design allows the fluid to be more evenly distributed and flow when passing through the guide portion 32, reducing the turbulence and pressure loss of the fluid and improving the drainage efficiency. Specifically, the circular structure of the guide portion 32 ensures the consistency and symmetry of the flow channels, thereby ensuring that the fluid passes smoothly and smoothly throughout the process. Each circle of flow channels is closely adjacent to each other, forming a multi-level fluid channel system, which helps to further optimize the movement trajectory of the fluid.

[0044] For example, to achieve the aforementioned structure of the flow guide 32, high-precision molds can be used during the manufacturing process to ensure the accuracy of the circular contour and flow path layout of the flow guide 32. Specifically, the flow guide 32 can be made of a high-strength, corrosion-resistant material, such as stainless steel or engineering plastic, to ensure that it will not deform or corrode during long-term use in a swimming pool environment. During assembly, the flow guide 32 needs to be securely installed in the corresponding position of the drainage system, typically at the pump inlet, to ensure that the flow path is smoothly connected to the pump's water inlet, thereby effectively guiding the fluid into the drainage system.

[0045] In one embodiment, in a drainage device of a swimming pool cleaning robot of the present application, a raised pattern 36 is provided on the outside of the guide portion 32 (see Figure 3) for easy disassembly. The design of the raised pattern 36 increases the contact area between the guide portion 32 and the hand during disassembly. The shape and layout of the raised pattern 36 can be designed according to actual needs, such as using spiral, linear, or other regular shapes to accommodate different types of water flow and discharge requirements.

[0046] For example, the raised lines 36 can be manufactured by compression molding, where they are directly pressed into shape by a mold during the production of the guide portion 32 to form a stable texture structure. This manufacturing method is simple and efficient, and can effectively ensure the consistency and accuracy of the raised lines 36.

[0047] In one embodiment, the drain device of a pool cleaning robot of the present application is provided with reinforcing ribs 37 on the outside of the connection portion 33. The primary function of these ribs 37 is to ensure the strength of the connection portion while enhancing the structural stability of the entire drain device. Specifically, the ribs 37 are evenly distributed along the outer surface of the connection portion, effectively enhancing the connection portion's resistance to compression and bending, ensuring that it is not easily deformed or damaged during long-term use.

[0048] The connecting portion 33 is typically a rectangular block structure, used to connect the drainage system to the pool cleaning robot's internal pump system or other key components. The addition of reinforcing ribs 37 on its outer surface not only improves its rigidity but also enhances the reliability of its connection with other components. The ribs 37 can be designed in a spiral, straight, or other shape, depending on actual use and design considerations.

[0049] For example, in one embodiment, the reinforcement ribs 37 on the outside of the connection can be manufactured using injection molding or welding. During the production process, the main structure of the connection is first fabricated, and then the reinforcement ribs 37 are added at specific locations. The design of the reinforcement ribs 37 can be optimized based on mechanical analysis results to ensure optimal support when subjected to external pressure. Specifically, if the injection molding process is chosen, multiple molds can be used for a single molding process, while if the welding process is chosen, precise welding positioning can be performed during the assembly stage to ensure the overall strength of the connection.

[0050] In one embodiment, Figure 4As shown, a pool cleaning robot of the present application has protective grilles 38 installed between the connections of the drainage device. These grilles 38 are primarily used to prevent large foreign objects from entering the drainage device, thereby protecting the internal mechanical components and electronic components from damage. Specifically, the grilles 38 are installed between multiple connections to ensure effective sealing and protection of each connection. The grilles 38 can be made of metal, plastic, or other suitable materials, and have a grid-like or perforated plate structure, providing excellent rigidity and durability. Furthermore, the design of the grilles 38 should take into account the smooth flow of water to avoid blockage during the cleaning process.

[0051] In one embodiment, the protective grille 38 can be secured between the connecting portions 33 by welding, snap fastenings, or screws. For example, corresponding mounting holes or slots can be provided on each connecting portion, into which the protective grille 38 can be inserted and secured. This securing method not only facilitates installation but also ensures a tight fit between the protective grille 38 and the connecting portion, further enhancing the overall performance of the drainage device. Specifically, grooves or raised structures are provided between the connecting portions to allow the protective grille 38 to be securely embedded, ensuring that it does not loosen or shift during use.

[0052] During actual operation, the filtered water first impacts the impeller 2 mounted on the mounting base 1. As the impeller 2 rotates at high speed due to the water flow, the impeller 2 interacts with the impeller cover 3, generating negative pressure. This negative pressure not only increases the water's inflow rate but also helps further clean the filter structure. Simultaneously, the water flows into the impeller cover 3 through the water inlet 34 formed between the mounting portion 31 and the guide portion 32. Under the action of the impeller 2, the water is rapidly directed along the guide portion 32 to the water outlet 35. The guide portion 32 is designed as an inclined grid, which not only effectively disperses the water flow and reduces the resistance caused by turbulence, but also prevents larger foreign objects from being re-entered into the drainage system. Finally, the water, redirected by the guide portion 32, is smoothly discharged back into the swimming pool through the water outlet 35. The entire process is efficient and environmentally friendly. Throughout the entire operation, the various components work closely together to ensure smooth pool cleaning.

[0053] In one embodiment, a key feature of the drainage device of a pool cleaning robot of the present application is that water must pass through a filter before entering the water inlet 34 and then be discharged by the impeller 2. The filter in this drainage device is located in front of the water inlet 34, ensuring that all water entering the water inlet 34 must pass through the filtering effect of the filter. The top of the filter is designed to be higher than the bottom of the water inlet 34. This design effectively prevents water from directly entering the water inlet 34 without passing through the filter. Through this design, the filter can intercept larger particles of impurities, preventing these impurities from clogging the impeller 2 or other internal components, ensuring the normal operation of the device. In addition, by setting the top height of the filter higher than the bottom height of the water inlet 34, the water does not form an updraft when passing through the filter and entering the impeller 2, thereby reducing the power loss of the impeller 2 and improving the filtration efficiency.

[0054] Specifically, the filter is typically removably mounted in front of the water inlet 34 for periodic cleaning or replacement. For example, the filter can be secured to the front panel of the device using clips or screws, allowing the user to easily remove the filter for cleaning. The water inlet 34 is designed to match the shape and size of the filter, ensuring that water flows smoothly through the filter and into the water inlet 34 before flowing to the impeller 2 for further processing.

[0055] In addition, for the drainage device of the present application, a magnet can also be provided in the drainage device, specifically, at the bottom of the impeller cover 3, more specifically, a circle of magnet elements can be provided at the bottom of the mounting portion 31 of the impeller cover 3. Specifically, the magnet can be a neodymium iron boron magnet, and a groove or hole matching the magnet can be reserved or machined at the bottom of the impeller cover 3, and then a suitable adhesive (such as epoxy resin glue or a strong glue specially used for bonding metal to plastic) can be used to stick the magnet to the predetermined position, thereby achieving the installation of the magnet at the bottom of the impeller cover 3. In the present application, since the impeller 2 is driven to rotate by a motor installed inside the mounting base 1, thereby providing negative pressure suction, and since a Hall element is provided at the corresponding position inside the motor compartment, the magnet installed at the bottom of the impeller cover 3 will be sensed by the Hall element therein. In the present application, after the impeller cover 3 is removed from the mounting base 1, the magnet installed at the bottom of the impeller cover 3 will not be sensed by the Hall element. In this case, the power supply to the motor will be directly cut off. That is to say, when the impeller cover 3 is removed, the power supply to the motor is cut off, so that the motor will not rotate regardless of whether it is started or not, thereby preventing the potential danger caused by the high-speed rotation of the impeller 2, thereby improving the safety of the operation of the entire robot.

[0056] During actual operation, when the device is in use, impeller 2 is powered by a drive power supply. The centrifugal force generated by its rotation creates negative pressure within the drainage device, drawing clean, filtered water into impeller 2 mounted on base 1. The water then flows through mounting portion 31 of the impeller housing, which directs the water around impeller 2. Driven by the high-speed rotation of impeller 2, the water is pushed into guide portion 33 within the impeller housing. Because guide portion 33 is designed with an inclined grid, it guides the water flow, allowing it to flow more smoothly through guide portion 33 and ultimately be evenly discharged through outlet 35, returning it to the swimming pool.

[0057] During this process, the first, second, and third water intrusion detection sensors, located at different locations, monitor water ingress in real time. If the second or third water intrusion detection sensors fail to detect water ingress, indicating that impeller 2 may be exposed to air, power to impeller 2 is cut off to prevent damage to the motor due to dry-burning. Once the sensors return to normal, power is restored to the motor, and the entire drainage system resumes normal operation, ensuring safe and efficient operation.

[0058] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the embodiments of the present disclosure. It should be understood that the above description is only a specific implementation method of the embodiments of the present disclosure and is not intended to limit the scope of protection of the embodiments of the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the embodiments of the present disclosure.

Claims

1. A drainage device for a swimming pool cleaning robot, characterized in that: include: A mounting base (1) is provided with an impeller (2); An impeller cover (3) is used to accommodate the impeller (2) and comprises a mounting portion (31) and a flow guide portion (32), wherein the mounting portion (31) is mounted on the mounting base (1), and the flow guide portion (32) is used to guide the outflow direction of water, wherein The mounting portion (31) and the flow guide portion (32) are connected by a connecting portion (33) to form a water inlet (34); The guide portion (32) is grid-shaped and is tilted to form a water outlet (35); and When the mounting portion (31) and the mounting base (1) are mounted in place, the orientation of the impeller cover (3) is fixed; wherein The swimming pool cleaning robot is provided with a first water entry detection sensor, a second water entry detection sensor and a third water entry detection sensor, wherein the position of the first water entry detection sensor is lower than that of the third water entry detection sensor, and the position of the second water entry detection sensor is forward of that of the first water entry detection sensor, and when the second water entry detection sensor or the third water entry detection sensor does not detect water entry, the impeller (2) is powered off.

2. The drainage device according to claim 1, characterized in that The mounting portion (31) is connected to the mounting base (1) via a snap fastener.

3. The drainage device according to claim 1, characterized in that: The upper edge of the water inlet (34) is lower than the lower edge of the impeller (2) to improve suction efficiency.

4. The drainage device according to claim 1, characterized in that: The length of the guide portion (32) is not less than 40 mm to improve the directionality of the water flow.

5. The drainage device according to claim 4, characterized in that: The guide portion (32) is circular and includes multiple flow channels surrounding the axis.

6. The drainage device according to claim 1, characterized in that: The outer side of the guide portion (32) is provided with raised lines (36) to facilitate disassembly.

7. The drainage device according to claim 1, characterized in that: A reinforcing rib (37) is provided on the outside of the connecting portion (33).

8. The drainage device according to claim 7, characterized in that: A protective grille (38) is provided between the connecting parts (33).

9. The drainage device according to claim 1, characterized in that: Water flows into the water inlet (34) through the filter screen and is discharged by the impeller (2). The top of the filter screen is higher than the bottom of the water inlet (34).

10. The drainage device according to claim 1, characterized in that: A magnet is provided at the bottom of the impeller cover (3).

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