Drainage device of swimming pool cleaning robot

Abstract

The embodiment of the invention 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 device of the pool cleaning robot is mainly used to effectively drain the filtered water from the cleaning robot to ensure that the water quality in the pool remains clean and clear. However, in actual use, how to effectively drain the water filtered by the pool cleaning robot becomes an important technical issue. This is not only related to the water circulation efficiency, but also directly affects the cleaning effect of the pool and the working efficiency of the robot. If the drainage is not smooth, it may cause the filter to be blocked or the water flow to be uneven, thus affecting the overall cleaning effect. 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] A drainage device of a swimming pool cleaning robot of the present application comprises:

[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 installed in place, the position 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 three 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 arranged 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 disposed at the bottom of the impeller cover, and when the impeller cover is removed from the mounting base, the power supply to the impeller is stopped.

[0020] The embodiment of the present disclosure provides a drainage device of a swimming pool cleaning robot, the drainage device comprising: a mounting base, on which an impeller is arranged; an impeller cover, which is used to accommodate the impeller and comprises a mounting portion and a guide portion, the mounting portion is mounted on the mounting base, the guide portion is used to guide the outflow direction of water, wherein 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 is inclined to form a water outlet; and when the mounting portion and the mounting base are installed in place, the orientation of the impeller cover is fixed. Through the solution of the embodiment of the present disclosure, it is possible to solve how to effectively discharge the water filtered by the swimming 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 drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show 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 related drawings can be obtained based on these drawings without paying 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 installed in place;

[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 diagram of the structure of the drainage device of the present 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 part; 32, guide part; 33, guide part; 34, water inlet; 35, water outlet; 36, raised pattern; 37, reinforcing rib; 38, protective grille DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the embodiments of the present disclosure are further described in detail 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 swimming pool cleaning robot, and a flow channel structure 120 is arranged inside the housing. The flow channel structure 120 is a water flow channel for water to flow. A filter structure 130 is arranged in the flow channel structure 120 to filter the water flowing through the flow channel structure 120, wherein a drainage device 140 is also arranged 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 swimming pool. The swimming pool cleaning robot of the present application is provided with a cleaning brush 170, which can rotate to clean the bottom or wall of the pool, and the driving mechanism 150 is responsible for driving the walking mechanism 160 and the cleaning brush 170 to clean the swimming pool during walking.

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

[0031] Next, refer to Figure 2 , describes a drainage device 140 of a swimming pool cleaning robot 100 of the present application, the device includes a mounting base 1, an impeller 2, an impeller cover 3 and other components. The device is installed inside the swimming pool cleaning robot, and cooperates with the housing 110, the flow channel structure 120, the filter structure 130, the driving mechanism 150, the walking mechanism 160 and the cleaning brush 170 to achieve the function of swimming pool cleaning.

[0032] Specifically, the mounting base 1 is used to fix the entire drainage device 140. It has a smooth surface to ensure that the drainage device remains stable during operation. The impeller 2 is mounted on the mounting base 1. The rotation of the impeller 2 generates negative pressure, so that the water flow is sucked in through the flow channel structure 120 and filtered through the filter structure 130. The shape of the impeller 2 is designed to be spiral or blade-shaped so that water can be efficiently sucked and discharged during the rotation process.

[0033] Specifically, 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 the 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, and 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 the 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 flow to smoothly enter the inside 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 by means of a buckle, and the orientation of the impeller cover 3 is fixed when installed in place. This is because the drainage direction of the pool cleaning robot is crucial. On the one hand, it needs to spray water backwards to propel the robot forward by the recoil force. On the other hand, when the robot is cleaning the wall, it also needs to spray water upwards to press the robot against the wall by 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, toward the rear 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 by buckles to the mounting base 1 to avoid the situation where the orientation of the guide portion 32 is not fixed when connected by means of threads or the like.

[0035] Specifically, the mounting base 1 is usually 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 that the efficient pumping capacity can be maintained after long-term operation. The impeller cover 3 also uses corrosion-resistant and wear-resistant materials to adapt to the chemicals and mechanical stress that may exist in the water. The installation of the mounting base 1 and the impeller cover 3 can also be achieved by means of snaps, threads or fasteners to ensure that the connection of each component is firm and reliable.

[0036] In addition, in the present application, in order to further enhance the intelligence and safety of the system, the swimming pool cleaning robot is provided with a plurality of water ingress detection sensors, namely, a first water ingress detection sensor, a second water ingress detection sensor and a third water ingress detection sensor. Among them, the first water ingress detection sensor is located lower than the third water ingress detection sensor, and the second water ingress detection sensor is located in front of the first water ingress detection sensor. When the second water ingress detection sensor or the third water ingress detection sensor fails to detect water flow, the system will automatically cut off the power supply of the impeller 2 to prevent the equipment from being damaged in a dry running state.

[0037] Specifically, for example, the first water ingress 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 ingress 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 ingress sensor, and the position of the third water ingress sensor is higher than the position of the first water ingress sensor, for example, it can be arranged on the top of the object 110, so that when the third water ingress sensor does not detect water ingress, the robot 100 may still be on the shore at this time, and even if the robot 100 is turned on, the impeller 2 does not rotate; similarly, when the second water ingress sensor does not detect water ingress, the robot may be cleaning the side wall and has already exited the water, and the impeller 2 is also automatically powered off at this time. This is because, on the one hand, the impeller 2 motor is easily damaged due to heat when it rotates highly in the air, and if it rotates in the air, for example, during maintenance, if the maintenance personnel's fingers are deeply inserted into the impeller 2, it may also cause injury.

[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, the drainage device greatly improves the working efficiency and service life of the swimming pool cleaning robot while ensuring the smooth flow path of the water.

[0039] In one embodiment, Figure 4 As 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 overhaul. Specifically, the inner wall and outer side of the inner cavity of the mounting portion 31 include a plurality of protruding structures, and the corresponding recessed structure is installed at the corresponding position of the mounting base 1. 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 against the protrusion on the mounting base 1 in parallel. 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 3As shown, the upper edge of the water inlet 34 of the drainage device of a swimming 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 installed in place, the impeller 2 cannot be seen from the front, that is, the impeller 2 is completely covered by the guide part 32. This design ensures that the water flow can enter the drainage device more smoothly and effectively improves the suction efficiency. This is because the impeller 2 rotates to discharge water outward. If the upper edge of the water inlet 34 is higher than the lower edge of the impeller 2, part of the water will be discharged through the water inlet 34, thereby reducing the drainage efficiency.

[0041] Specifically, a certain vertical distance can be maintained between the water inlet 34 and the impeller 2. This distance design makes the water level of the water inlet 34 lower than the lowest point of the impeller 2, thereby reducing the 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. Such a height difference can effectively optimize the fluid mechanics performance, so that the water flow obtains sufficient pre-acceleration before entering the impeller 2, and further improves the drainage efficiency.

[0042] In one embodiment, in a drainage device of a swimming pool cleaning robot of the present application, the length of the guide 32 is not less than 40 mm, which helps to improve the directionality of the water flow. Specifically, the guide 32 is a key component located near the drain port, and its main function is to guide the discharged water flow to a specified direction and reduce the scattering and waste of water during the discharge process. The guide 32 is usually installed at the outlet of the drain pipe to form a continuous flow channel. The length of this component determines the degree of guidance of the water flow during the discharge process. By designing the length of the guide 32 to be not less than 40 mm, the directionality and concentration of the water flow can be significantly improved, ensuring that the direction of the water flow is more consistent. If the length of the guide 32 is decisive, the turbulence caused by the stirring of the impeller 2 has not yet formed a more consistent directional flow through the guide 32, thereby reducing the directionality, specifically, reducing the directionality of the discharge to the rear and upper side, and reducing the robot's forward power and the ability to climb the wall (when climbing the wall, 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. 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 channel, 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, in order to realize the structure of the above-mentioned guide part 32, a high-precision mold can be used in the manufacturing process to ensure the accuracy of the circular contour and flow channel layout of the guide part 32. Specifically, the guide part 32 can be made of high-strength corrosion-resistant materials, such as stainless steel or engineering plastics, to ensure that it can be used for a long time in the swimming pool environment without deformation or corrosion. During the assembly process, the guide part 32 needs to be firmly installed at the corresponding position of the drainage device, usually at the inlet of the pump, to ensure that the flow channel is smoothly connected to the water inlet of the pump, 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 outer side 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 a spiral, linear or other regular shape to adapt to different types of water flow and discharge requirements.

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

[0047] In one embodiment, a connection portion 33 of a drainage device of a pool cleaning robot of the present application is provided with a reinforcing rib 37 on the outside. The main function of the reinforcing rib 37 is to improve the structural stability of the entire drainage device while ensuring the strength of the connection portion. Specifically, the reinforcing rib 37 is evenly distributed along the outer surface of the connection portion, which can effectively enhance the compression resistance and bending resistance of the connection portion, ensuring that it is not easily deformed or damaged during long-term use.

[0048] The connection part 33 is generally a rectangular block structure, which is used to connect the drainage device to the water pump system or other key components inside the pool cleaning robot. By adding reinforcing ribs 37 on its outer side, not only the rigidity of the connection part 33 is improved, but also the reliability of the connection with other components is increased. The design of the reinforcing ribs 37 can be spiral, straight or other shapes, and the specific shape depends on the actual use requirements and design considerations.

[0049] For example, in one embodiment, the reinforcing rib 37 on the outside of the connection part can be manufactured by injection molding or welding process. In the production process, the main structure of the connection part is first made, and then the reinforcing rib 37 is added at a specific position. The design of the reinforcing rib 37 can be optimized according to the results of mechanical analysis to ensure that it has the best support effect when subjected to external pressure. Specifically, if the injection molding process is selected, it can be formed in one time through multiple molds, and if the welding process is selected, precise welding positioning can be performed during the assembly stage to ensure the overall strength of the connection part.

[0050] In one embodiment, Figure 4 As shown, a protective grille 38 is provided between the connection parts of the drainage device of a swimming pool cleaning robot of the present application. The protective grille 38 is mainly used to prevent larger foreign objects from entering the interior of the drainage device, thereby protecting the internal mechanical parts and electronic components from damage. Specifically, the protective grille 38 is installed between multiple connection parts to ensure the effective closure and protection of each connection part. The protective grille 38 can be made of metal, plastic or other suitable materials, and its structure is in the form of a grid or a perforated plate, with good rigidity and durability. In addition, the design of the protective grille 38 should take into account the smoothness of water flow to avoid blockage during the cleaning process.

[0051] In one embodiment, the protective grille 38 can be fixed between the various connecting parts 33 by welding, snapping or screwing. For example, a corresponding mounting hole or slot can be set on each connecting part, and the protective grille 38 can be inserted and fixed. This fixing method is not only convenient for installation, but also ensures a close fit between the protective grille 38 and the connecting part, further improving the overall performance of the drainage device. Specifically, a groove or a protruding structure is set between the connecting parts, so that the protective grille 38 can be firmly embedded therein, ensuring that it does not loosen or move during use.

[0052] In actual operation, the filtered water flow will first impact 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 to generate negative pressure. This negative pressure not only increases the inflow speed of water, but also helps to further clean the filter structure. At the same time, the water flows into the impeller cover 3 from the water inlet 34 formed between the mounting portion 31 and the guide portion 32, and is quickly guided to the water outlet 35 along the guide portion 32 under the action of the impeller 2. The guide portion 32 is designed to be an inclined grid, which can not only effectively disperse the water flow and reduce the resistance caused by turbulence, but also prevent larger foreign objects from being re-entered into the drainage device. Finally, the water adjusted in direction by the guide portion 32 is smoothly discharged back to the swimming pool through the outlet 35. The whole process is efficient and environmentally friendly. During the entire operation, the various components work closely together to ensure the smooth progress of the swimming pool cleaning work.

[0053] In one embodiment, an important feature of the drainage device of a swimming pool cleaning robot of the present application is that the water flow needs to pass through a filter before entering the water inlet 34, and then be discharged by the impeller 2. The filter in the drainage device is arranged in front of the water inlet 34 to ensure that all water flows entering the water inlet 34 must pass through the filtering effect of the filter. The top position of the filter is designed to be higher than the bottom position of the water inlet 34, and this design effectively prevents the water flow from directly entering the water inlet 34 without the filter. Through such a design, the filter can intercept larger particles of impurities, prevent these impurities from clogging the impeller 2 or other internal components, and ensure the normal operation of the equipment. In addition, by setting the top height of the filter to be higher than the bottom of the water inlet 34, the water flow will not form an upflow when it passes through the filter to enter the impeller 2, thereby reducing the power loss of the impeller 2 and improving the efficiency of filtration.

[0054] Specifically, the filter is usually installed in a detachable form at the front of the water inlet 34 so that it can be cleaned or replaced regularly. For example, the filter can be fixed to the front panel of the device by a buckle or screw, so that the user can easily remove the filter for cleaning. The water inlet 34 is designed to match the shape and size of the filter to ensure that the water flow can smoothly pass through the filter and enter the water inlet 34, and then flow to the impeller 2 for further processing.

[0055] In addition, for the drainage device of the present application, a magnet can also be arranged in the drainage device, specifically, at the bottom of the impeller cover 3, more specifically, a circle of magnet elements can be arranged 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 processed at the bottom of the impeller cover 3, and then the magnet can be attached to the predetermined position using a suitable adhesive (such as epoxy resin glue or a strong glue specially used for bonding metal to plastic), so as to achieve the installation of the magnet at the bottom of the impeller cover 3.

[0056] In the present application, since the impeller 2 is driven to rotate by the motor installed inside the mounting base 1, thereby providing negative pressure suction, and since the motor contains a Hall element, the magnet installed at the bottom of the impeller cover 3 will be sensed by the Hall element. 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, when the impeller cover 3 is removed, the power supply to the motor is cut off, so that it will not rotate regardless of whether it is started, 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.

[0057] In actual operation, when the device is used, the impeller 2 is powered by a driving power supply, and the centrifugal force generated by the rotation generates negative pressure in the drainage device, and the filtered clean water is sucked into the impeller 2 on the mounting base 1. Subsequently, the water flows in through the mounting portion 31 of the impeller 2 cover, which guides the water flow around the impeller 2. Under the high-speed rotation of the impeller 2, the water flow is pushed to the guide portion 33 in the impeller 2 cover. Since the guide portion 33 is an inclined grid-like design, it can have a certain guiding effect on the water flow, so that the water flow passes through the guide portion 33 more smoothly, and is finally discharged evenly through the water outlet 35 and returns to the swimming pool.

[0058] During this process, the first water ingress detection sensor, the second water ingress detection sensor and the third water ingress detection sensor are responsible for real-time monitoring of the water ingress situation. They are located at different positions to detect the water ingress situation of the robot. Once the second water ingress detection sensor or the third water ingress detection sensor fails to detect water ingress, it indicates that the impeller 2 may be exposed to the air. At this time, the power supply to the impeller 2 is cut off to prevent the motor from being damaged due to dry burning. When the sensor returns to normal, the motor regains power, and the entire drainage system continues to operate normally, ensuring the safety and efficient operation of the device.

[0059] 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 the specific implementation method of the embodiments of the present disclosure and is not intended to limit the protection scope of the embodiments of the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the protection scope 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) on which an impeller (2) is disposed; 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 arranged obliquely to form a water outlet (35); and When the mounting portion (31) and the mounting base (1) are mounted in place, the position 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 fails to 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 buckle.

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 the 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 flow guide portion (32) is circular and comprises three circles of 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 patterns (36) to facilitate disassembly.

7. The drainage device according to claim 1, characterized in that: A reinforcing rib (37) is provided on the outer side 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), and the top height of the filter screen is higher than the bottom height 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), and when the impeller cover (3) is removed from the mounting base (1), the power supply to the impeller (2) is stopped.

Images