Water pump assembly, water tank, cleaning device and cleaning system

Abstract

The application provides a water pump assembly, a water tank, a cleaning device and a cleaning system, and aims to improve the liquid discharge efficiency of the water pump and reduce the risk of cavitation when the liquid level is low. The water pump assembly comprises a pump body, a rotating shaft, a first blade and a flow guide structure. The pump body has an impeller cavity, an inlet and an outlet connected with the impeller cavity. The rotating shaft is arranged in the pump body and can rotate relative to the pump body. The first blade is located in the impeller cavity and is fixed to the rotating shaft. The flow guide structure is arranged on the rotating shaft and spirally extends around the rotating shaft, at least part of the flow guide structure is located between the first blade and the inlet; the flow guide structure has a flow guide surface, the flow guide surface forms a spiral surface, and the flow guide surface is used for guiding the liquid to the first blade when the rotating shaft rotates relative to the pump body. The water pump assembly provided by the application has high liquid discharge efficiency and low cavitation risk.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, specifically to a water pump assembly, a water tank, a cleaning device, and a cleaning system. Background Technology

[0002] Impeller pumps, with their good head and suction efficiency, are commonly used liquid transport equipment. However, according to relevant technologies, when using an impeller pump to transport liquids, the impeller's suction port needs to be lower than the liquid level. When the liquid level is low, the impeller pump will only draw in air and cannot properly pump liquid, leading to cavitation, damaging pump components, reducing efficiency, and resulting in a higher residual liquid level. Utility Model Content

[0003] This application provides a water pump assembly, a water tank, a cleaning device, and a cleaning system to address the problem of improving the drainage efficiency of a water pump and reducing the risk of cavitation when the liquid level is low.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a water pump assembly, which includes a pump body, a rotating shaft, a first blade, and a flow guiding structure. The pump body has an impeller cavity, and an inlet and an outlet communicating with the impeller cavity. The rotating shaft is disposed within the pump body and is rotatable relative to the pump body. The first blade is located within the impeller cavity and fixed to the rotating shaft. The flow guiding structure is disposed on the rotating shaft and extends helically around the rotating shaft, with at least a portion of the flow guiding structure located between the first blade and the inlet; the flow guiding structure has a flow guiding surface, which forms a helical surface, and the flow guiding surface is used to guide liquid to the first blade when the rotating shaft rotates relative to the pump body.

[0006] Secondly, embodiments of this application provide a water pump assembly, which includes a pump body, a rotating shaft, a first blade, and a flow guiding structure. The pump body has an impeller cavity, and an inlet and an outlet communicating with the impeller cavity. The rotating shaft is disposed within the pump body and is rotatable relative to the pump body. The first blade is located within the impeller cavity and fixed to the rotating shaft. The flow guiding structure is disposed on the rotating shaft and extends helically around the rotating shaft, and the flow guiding structure is located below the first blade; the flow guiding structure has a flow guiding surface, which forms a helical surface, and the flow guiding surface is used to deliver liquid to the first blade when the rotating shaft rotates relative to the pump body.

[0007] In some possible implementations of the first or second aspect, the flow guiding structure includes a second blade, which is fixed to the outer peripheral surface of the rotating shaft and extends spirally about the rotating shaft, with a portion of the surface of the second blade forming a flow guiding surface.

[0008] In some possible implementations of the first or second aspect, along the axial direction of the rotation axis, the edge of the flow guide structure away from the first blade is flush with the edge of the inlet away from the first blade; or, the edge of the flow guide structure away from the first blade is located on the side of the inlet opposite to the first blade.

[0009] In some possible implementations of the first or second aspect, the distance between the edge of the first blade furthest from the rotation axis and the axis of the rotation axis along the radial direction of the rotation axis is a first distance. The ratio of the lead of the guide structure to the first distance is greater than or equal to 1 / 5 and less than or equal to 1 / 3.

[0010] In some possible implementations of the first aspect, the helix angle of the flow guide structure is greater than or equal to 15° and less than or equal to 25°.

[0011] In some possible implementations of the first or second aspect, along the radial direction of the rotation axis, the distance between the edge of the first blade away from the rotation axis and the axis of the rotation axis is a first distance, and the distance between the edge of the guide structure away from the axis of the rotation axis and the axis of the rotation axis is a second distance. The ratio of the second distance to the first distance is greater than or equal to 1 / 3 and less than or equal to 3 / 5.

[0012] In some possible implementations of the first or second aspect, the cross-section of the flow guiding structure in the first plane includes a first side segment and a second side segment, both of which are in contact with the outer peripheral surface of the rotating shaft; the included angle between the first side segment and the second side segment is greater than or equal to 17° and less than or equal to 27°.

[0013] In some possible implementations of the first or second aspect, the pump body also has a motor cavity. The pump assembly also includes a motor, which comprises a motor body and an output shaft, the motor body being fitted and housed within the motor cavity, and the output shaft forming at least a portion of a rotating shaft.

[0014] In some possible implementations of the first or second aspect, the pump body has a liquid outlet channel communicating with the impeller cavity, and an opening of the liquid outlet channel forms a liquid outlet. The pump body includes a baffle portion, which includes a first surface and a second surface facing away from each other, at least a portion of the first surface forming a portion of the inner wall surface of the motor cavity, and the second surface forming a portion of the inner wall surface of the liquid outlet channel.

[0015] In some possible implementations of the first or second aspect, the pump body includes a pump body body and a surrounding plate. An impeller cavity and a motor cavity are formed in the pump body body, and a portion of the pump body body forms a baffle. The surrounding plate is connected to the outer peripheral surface of the pump body body and is in contact with the baffle, and the surrounding plate and a second surface enclose a liquid outlet channel. The ratio of the length of the intersection line of the second surface and the second plane to the length of the intersection line of the outer peripheral surface of the pump body body and the second plane is greater than or equal to 5%, and the second plane is a plane perpendicular to the axis of rotation and passing through the motor cavity.

[0016] In some possible implementations of the first or second aspect, the liquid outlet channel extends linearly along the axial direction of the rotation shaft; or, the liquid outlet channel extends spirally around the motor cavity.

[0017] Thirdly, embodiments of this application provide a water tank, which includes a tank body and a water pump assembly. The tank body has a first receiving cavity and a first opening communicating with the first receiving cavity, and the tank body includes a bottom wall opposite to the first opening. The water pump assembly is disposed within the first receiving cavity, and the water pump assembly is the water pump assembly described in any of the above implementations; a flow guiding structure is located between the bottom wall and the first blade, and both the flow guiding structure and the liquid inlet are spaced apart from the bottom wall.

[0018] In some possible implementations of the third aspect, the tank also includes a first side frame and a first partition. The first side frame is connected to the bottom wall and is arranged around the bottom wall to enclose a first receiving cavity. The first partition is connected to the first side frame and the bottom wall to divide the first receiving cavity into a first chamber and a second chamber. The water tank also includes a drain plate, which is disposed in the first chamber and spaced apart from the bottom wall to divide the first chamber into a first cavity portion and a second cavity portion. The bottom wall forms part of the cavity wall of the second cavity portion; the liquid inlet is located in the second cavity portion, and the liquid outlet is located in the second cavity portion.

[0019] In some possible implementations of the third aspect, the water tank further includes a drain basket, which is detachably disposed within the first chamber; the drain basket includes the aforementioned drain plate and a second side frame. The second side frame is connected to the drain plate and is disposed around the drain plate to form a second receiving cavity.

[0020] In some possible implementations of the third aspect, the tank has a sewage inlet and an exhaust outlet, with the sewage inlet communicating with the first cavity. The water tank also includes a cover connected to the first side frame, capable of sealing or opening the first opening; the cover includes a first air duct structure, with the air inlet of the first air duct structure communicating with the first cavity and the air outlet of the first air duct structure communicating with the exhaust outlet.

[0021] In some possible implementations of the second aspect, the distance between the inlet and the bottom wall is greater than or equal to 2 mm.

[0022] Fourthly, embodiments of this application provide a cleaning device, which includes a device body and a water tank. The device body is used to clean the surface to be cleaned. The water tank is any of the water tanks described in the above implementations, and is disposed in the device body for storing dirt from the surface to be cleaned.

[0023] Fifthly, embodiments of this application provide a cleaning system, which includes a base station and cleaning equipment. The cleaning equipment is the aforementioned cleaning equipment, and the cleaning equipment can remain on the base station.

[0024] The water pump assembly, water tank, cleaning equipment, and cleaning system provided in this application have the following beneficial effects:

[0025] The water pump assembly provided in this application has an impeller cavity and an inlet and an outlet communicating with the impeller cavity. A rotating shaft is set in the pump body and can rotate relative to the pump body. The first blade is located in the impeller cavity and fixed to the rotating shaft. When the rotating shaft rotates relative to the pump body, it can drive the first blade to rotate, thereby driving the liquid on the first blade to rotate at high speed. The liquid enters the pump body under the action of centrifugal force and flows out from the outlet.

[0026] Based on this, by extending the guide structure spirally around the rotating shaft, with at least a portion of the guide structure located between the first blade and the inlet, the rotating shaft can drive the guide structure to rotate when it rotates. The guide surface of the guide structure can guide the liquid to the first blade. Therefore, when the liquid level in the tank of the water pump assembly is low, especially when the liquid level is between the first blade and the bottom wall, the guide surface can guide the liquid to the first blade, so that the liquid flows out from the outlet under the action of the first blade. This can improve the drainage efficiency of the water pump assembly, reduce the amount of liquid remaining in the tank, and prevent the water pump assembly from drawing in air and increasing the risk of cavitation when the liquid level is low. At the same time, the liquid will not exert a radial force on the guide structure, which is beneficial to extending the service life of the water pump assembly.

[0027] Alternatively, by positioning the guide structure below the first blade, the guide surface can deliver liquid to the first blade, allowing the inlet to be coaxial with the rotating shaft, and the inlet's axis to be perpendicular to the rotating shaft. This improves drainage efficiency and reduces cavitation risk when the water level in the pump assembly's tank is low, while also facilitating flexible inlet placement based on inspection and cleaning needs.

[0028] The beneficial technical effects of the water tank, cleaning equipment, and cleaning system provided in this application are the same as those of the water pump assembly provided in this application, and will not be repeated here. Attached Figure Description

[0029] Figure 1 This application provides schematic diagrams of the structure of cleaning equipment according to some embodiments;

[0030] Figure 2 for Figure 1 A schematic diagram of the water tank of the cleaning equipment shown;

[0031] Figure 3 for Figure 2 An exploded view of part of the structure of the water tank shown.

[0032] Figure 4 for Figure 2 The cross-sectional structure diagram of the water tank shown is located at line AA.

[0033] Figure 5 for Figure 3 A schematic diagram of the water pump assembly of the water tank shown.

[0034] Figure 6 for Figure 5 The exploded view of the water pump assembly is shown.

[0035] Figure 7 for Figure 5 The cross-sectional structure diagram of the water pump assembly at line BB is shown.

[0036] Figure 8 for Figure 5 The diagram shows the cross-sectional structure of the water pump assembly at line CC.

[0037] Figure 9 for Figure 3 A schematic diagram of the structure of the water tank shown;

[0038] Figure 10 for Figure 3 A schematic diagram of the structure of the cover of the water tank shown;

[0039] Figure 11 This is a schematic diagram of the structure of a cleaning system provided in some embodiments of this application.

[0040] Figure label:

[0041] Cleaning system 1000;

[0042] 100 cleaning equipment;

[0043] Equipment body 110; body 111; floor brush assembly 112; housing 1121; cleaning component 1122; water tank 120; box 10; first receiving cavity 10a; first chamber 10a1; first cavity 10a11; second cavity 10a12; second chamber 10a2; first opening 10b; sewage inlet 10c; exhaust port 10d; bottom wall 11; first side frame 12; first partition 13; drain basket 20; second receiving cavity 20a; drain plate 21; second side frame 22; water pump assembly 30; pump body 31; impeller cavity 31a; liquid inlet 31b; liquid outlet 3 1c; Motor cavity 31d; First through hole 31e; Liquid outlet channel 31f; Pump body 311; Baffle 3111; First surface 3111a; Second surface 3111b; Enclosure 312; First cover plate 313; Second cover plate 314; Rotating shaft 32; First blade 33; Guide structure 34; Guide surface 34a; Second blade 341; First side section 3411; Second side section 3412; Motor 35; Motor body 351; Output shaft 352; Bushing 36; Seal 37; Cover 40; First air duct structure 41; Air inlet 41a; Air outlet 41b;

[0044] Base station 200. Detailed Implementation

[0045] In the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0046] In the embodiments of this application, it should be understood that the directional terms mentioned, such as "up", "down", "left", "right", "inner", "outer", etc., are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0048] In embodiments of this application, 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 that element.

[0049] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0050] In the embodiments of this application, it should be noted that the descriptions of "vertical" and "parallel" respectively indicate approximately vertical and approximately parallel within a certain error range. This error range can be a range with a deviation angle of less than or equal to 5°, 8° or 10° relative to absolute verticality and absolute parallelism, respectively, and is not specifically limited here.

[0051] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0052] This application provides a cleaning device, including but not limited to vacuum cleaners, sweeping machines, floor scrubbers, fabric cleaning machines, and robotic vacuum cleaners. This application uses a floor scrubber as an example to illustrate the cleaning device.

[0053] Please refer to the following: Figure 1 and 2 , Figure 1 This is a schematic diagram of the structure of a cleaning device 100 provided in some embodiments of this application. Figure 2 for Figure 1The diagram shows the structure of the water tank 120 of the cleaning device 100. The cleaning device 100 includes a main body 110 and a water tank 120. The main body 110 includes a body 111 and a floor brush assembly 112. The floor brush assembly 112 includes a housing 1121 and a cleaning component 1122. The cleaning component 1122 can be mounted on the housing 1121 and can rotate relative to the housing 1121. The housing 1121 has a suction channel (not shown in the diagram). Specifically, the housing 1121 is made of materials including, but not limited to, metal and plastic; the cleaning component 1122 can be a roller brush or a mop, etc., wherein the axis of rotation of the cleaning component 1122 can be parallel to or perpendicular to the surface to be cleaned (e.g., the floor). Based on this, the body 111 is rotatably connected to the floor brush assembly 112. Specifically, the body 111 can be rotatably connected to the housing 1121, and a fan (not shown in the diagram) is installed inside the body 111. In some other embodiments, when the cleaning device 100 is another type of cleaning device, the floor brush assembly 112 may not include the cleaning component 1122.

[0054] Based on this, the water tank 120 can be disposed on the housing 1121. The inner cavity of the water tank 120 is connected to the suction channel and the fan of the housing 1121, so that the cleaning component 1122 and / or the dirt on the surface to be cleaned can be sucked into the water tank 120 under the action of the fan. That is, the water tank 120 is used to store the dirt from the surface to be cleaned. Specifically, the dirt can be solid dirt, liquid dirt, or a mixture of solid and liquid dirt. The water tank 120 can be detachably installed on the housing 1121 by means of snap-fit, threaded connection, etc., so as to facilitate the cleaning of the dirt in the water tank 120. In some other embodiments, the body 111 can also be fixed relative to the housing 1121 of the floor brush assembly 112. In still some other embodiments, the water tank 120 can also be installed on the body 111.

[0055] Please refer to the following: Figures 2-4 , Figure 3 for Figure 2 An exploded view of part of the structure of water tank 120 is shown. Figure 4 for Figure 2The diagram shows a cross-sectional view of the water tank 120 at line AA. The water tank includes a tank body 10, a drain basket 20, a water pump assembly 30, and a cover 40. The tank body 10 has a first receiving cavity 10a and a first opening 10b communicating with the first receiving cavity 10a. Specifically, the tank body 10 includes a bottom wall 11 and a first side frame 12. The bottom wall 11 is opposite to the first opening 10b, and the first side frame 12 is connected to the bottom wall 11 and is arranged around the bottom wall 11 to enclose the first receiving cavity 10a. Based on this, the water pump assembly 30 is disposed in the first receiving cavity 10a, and the liquid inlet 31b of the water pump assembly 30 is opposite to the bottom wall 11. The water pump assembly 30 is used to discharge the liquid in the first receiving cavity 10a to the outside of the water tank or to discharge the liquid in one chamber of the first receiving cavity 10a to another chamber.

[0056] Please refer to the following: Figures 5-7 , Figure 5 for Figure 3 The schematic diagram of the water pump assembly 30 in the water tank 120 is shown. Figure 6 for Figure 5 The exploded view of the water pump assembly 30 shown is shown. Figure 7 for Figure 5 The diagram shows a cross-sectional view of the pump assembly 30 at line BB. The pump assembly 30 includes a pump body 31, a rotating shaft 32, at least one first blade 33, and a flow guide structure 34. The pump body 31 has an impeller cavity 31a and an inlet 31b and an outlet 31c communicating with the impeller cavity 31a. The rotating shaft 32 is disposed within the pump body 31 and is rotatable relative to the pump body 31. At least one first blade 33 is located within the impeller cavity 31a and fixed to the rotating shaft 32. Figures 5-7 In the illustrated embodiment, there are three first blades 33, and the first blades 33 are arc-shaped. In other embodiments, the number of first blades 33 may also be one, two, four, five, etc.

[0057] In some examples, the distance between the first blade 33 and the inner wall of the impeller cavity 31a along the radial direction of the rotation axis 32 is greater than or equal to 0.5 mm and less than or equal to 1.5 mm. For example, the distance between the first blade 33 and the inner wall of the impeller cavity 31a can be 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, etc. This allows solid particles in the liquid to pass between the first blade 33 and the inner wall of the impeller cavity 31a without jamming the first blade 33, and also ensures the efficiency and output of the pump assembly 30 as much as possible.

[0058] Based on this, a flow guiding structure 34 is disposed on the rotating shaft 32 and extends spirally around the rotating shaft 32, with at least a portion of the flow guiding structure 34 located between the first blade 33 and the liquid inlet 31b. The flow guiding structure 34 has a flow guiding surface 34a, which forms a spiral surface for guiding liquid to the first blade 33 when the rotating shaft 32 rotates relative to the pump body 31. Specifically, the spiral surface can be an Archimedean spiral surface or an involute surface. The flow guiding structure 34 can be a metal structure or a plastic structure.

[0059] In this way, the water pump assembly 30 provided in this application has an impeller cavity 31a and an inlet 31b communicating with the impeller cavity 31a. The rotating shaft 32 is disposed in the pump body 31 and can rotate relative to the pump body 31. The first blade 33 is located in the impeller cavity 31a and fixed to the rotating shaft 32. When the rotating shaft 32 rotates relative to the pump body 31, it can drive the first blade 33 to rotate, thereby driving the liquid on the first blade 33 to rotate at high speed. The liquid enters the pump body 31 under the action of centrifugal force and flows out from the outlet 31c.

[0060] Based on this, by extending the guide structure 34 spirally around the rotating shaft 32, with at least a portion of the guide structure 34 located between the first blade 33 and the inlet 31b, the rotating shaft 32 can rotate, causing the guide structure 34 to rotate as well. The guide surface 34a of the guide structure 34 can guide the liquid towards the first blade 33. Therefore, when the liquid level in the water tank 120 is low, especially when the liquid level is between the first blade 33 and the bottom wall 11, the liquid can be guided towards the first blade 33, allowing the liquid to flow out from the outlet 31c under the action of the first blade 33. This improves the drainage efficiency of the pump assembly 30, resulting in less residual liquid in the water tank 120. It also prevents the pump assembly 30 from drawing in air and increasing the risk of cavitation when the liquid level is low. At the same time, the liquid will not exert a radial force on the guide structure 34, which helps to extend the service life of the pump assembly 30.

[0061] In some other embodiments, the flow guiding structure 34 is disposed on and extends helically about the rotation shaft 32, and is located below the first blade 33. The flow guiding structure 34 has a flow guiding surface 34a, which forms a helical surface and is used to deliver liquid to the first blade 33 when the rotation shaft 32 rotates relative to the pump body 31.

[0062] This allows the inlet 31b to be coaxial with the rotating shaft 32, and the axial direction of the inlet 31b can also be perpendicular to the rotating shaft 32. Thus, when the liquid level in the water tank 120 is low, it can improve drainage efficiency and reduce the risk of cavitation, while also facilitating the flexible placement of the inlet 31b according to the needs of inspection and cleaning.

[0063] Please continue reading. Figure 6 and Figure 7 Along the axial direction of the rotation shaft 32, the edge of the flow guiding structure 34 away from the first blade 33 is flush with the edge of the inlet 31b away from the first blade 33; or, the edge of the flow guiding structure 34 away from the first blade 33 is located on the side of the inlet 31b opposite to the first blade 33.

[0064] In this way, when the liquid level is low, the flow guiding structure 34 can guide the liquid to the first blade 33 as much as possible, thereby improving the drainage efficiency of the pump assembly 30.

[0065] Please continue reading. Figure 6 and Figure 7 The flow guiding structure 34 includes a second blade 341, which is fixed to the outer circumferential surface of the rotating shaft 32 and extends spirally around the rotating shaft 32. A portion of the surface of the second blade 341 forms a flow guiding surface 34a. That is, the second blade 341 and the rotating shaft 32 can form an external thread structure. Figure 6 and Figure 7 In the illustrated embodiment, there is one second blade 341. In other embodiments, there may be multiple second blades 341, for example, two, three, four, etc., with multiple second blades 341 arranged at circumferential intervals along the rotation axis 32.

[0066] In this way, with a fixed width of the guide surface 34a along the radial direction of the rotation shaft 32, the diameter of the rotation shaft 32 can be smaller, which is beneficial for the lightweighting of the pump assembly 30, and consequently for the overall lightweighting of the cleaning equipment 100. Furthermore, by providing a second blade 341 on the rotation shaft 32, a wider guide channel can be more easily formed between adjacent blade segments along the axial direction of the rotation shaft 32, which helps to ensure the guiding velocity of the liquid by the guide structure 34, thereby ensuring the discharge efficiency of the pump assembly 30.

[0067] In some other embodiments, the flow guiding structure 34 may also include a recess (not shown in the figure), which is disposed on the outer peripheral surface of the rotating shaft 32 and recessed in a direction close to the axis of the rotating shaft 32, and a portion of the inner wall surface of the recess forms a flow guiding surface 34a.

[0068] Please refer to the following: Figures 6-8 , Figure 8 for Figure 5 The diagram shows the cross-sectional structure of the water pump assembly 30 at line CC. Figures 6-8 In the illustrated embodiment, the second blade 341 is a left-handed blade structure, and the circumferential extension direction of the second blade 341 around the rotation axis 32 is the same as the circumferential arching direction of the first blade 33 along the rotation axis 32. That is, as shown... Figure 8As shown, the first blade 33 arches clockwise around the rotation axis 32; from the end of the second blade 341 away from the first blade 33 to the end of the second blade 341 close to the first blade 33, the second blade 341 extends clockwise around the rotation axis 32. In some other embodiments, the second blade 341 may also be a right-handed blade structure, and changing the direction of rotation of the rotation axis 32 can cause the guide surface 34a to guide the liquid to the first blade 33.

[0069] Please continue reading. Figure 6 and Figure 7 Along the radial direction of the rotation shaft 32, the distance between the edge of the first blade 33 away from the rotation shaft 32 and the axis of the rotation shaft 32 is the first distance d1. The ratio of the lead S of the flow guiding structure 34 to the first distance d1 is greater than or equal to 1 / 5 and less than or equal to 1 / 3. For example, the ratio of S to d1 can be 1 / 5, 1 / 4, 1 / 3, etc.

[0070] This prevents the flow path of the guide structure 34 from being too small, resulting in a longer flow path and greater resistance. It also prevents the flow path of the guide structure 34 from being too large, which would cause the liquid to easily slide off the guide surface 34a under the influence of gravity when the diameter of the thread structure formed by the guide structure 34 and the rotating shaft 32 is constant, thus reducing the discharge efficiency of the pump assembly 30.

[0071] In some embodiments, the helix angle of the flow guiding structure 34 is greater than or equal to 12° and less than or equal to 25°. For example, the helix angle of the flow guiding structure 34 can be 12°, 15°, 18°, 22°, 25°, etc. This prevents the helix angle of the flow guiding structure 34 from being too small, resulting in a longer liquid flow path and greater resistance; it also prevents the helix angle of the flow guiding structure 34 from being too large, which would cause the liquid to easily slide off the flow guiding surface 34a under the influence of gravity, thereby reducing the drainage efficiency of the pump assembly 30.

[0072] In some embodiments, along the radial direction of the rotation shaft 32, the distance between the edge of the guide structure 34 away from the axis of the rotation shaft 32 and the axis of the rotation shaft 32 is a second distance d2, that is, the outer diameter of the aforementioned threaded structure is the second distance d2, and the ratio of the second distance d2 to the first distance d1 is greater than or equal to 1 / 3 and less than or equal to 3 / 5. For example, the ratio of d2 to d1 can be 1 / 3, 1 / 2, 3 / 5, etc.

[0073] This allows for a larger width of the guide surface 34a, ensuring efficient liquid flow to the first blade 33, thereby guaranteeing the discharge efficiency of the pump assembly 30 and reducing the risk of cavitation. It also prevents the guide surface 34a from being too large, which would result in an excessively large diameter of the pump body 31 inlet 31b, leading to increased leakage and decreased discharge efficiency.

[0074] Based on the above, please continue to refer to... Figure 6 and Figure 7 The flow guiding structure 34 has a cross-section in the first plane with an edge comprising a first side segment 3411 and a second side segment 3412, which are in contact with the outer peripheral surface of the rotating shaft 32. The included angle between the first side segment 3411 and the second side segment 3412 is greater than or equal to 17° and less than or equal to 27°. That is, the tooth profile angle of the thread structure formed by the flow guiding structure 34 and the rotating shaft 32 is greater than or equal to 17° and less than or equal to 27°. For example, the tooth profile angle can be 17°, 19°, 22°, 25°, 17°, etc. Specifically, the tooth profile of the thread structure formed by the flow guiding structure 34 and the rotating shaft 32 can be approximately triangular, approximately trapezoidal, or other shapes.

[0075] This design prevents the thread angle of the threaded structure formed by the flow guide structure 34 and the rotating shaft 32 from being too large, resulting in a thinner thread root and weaker load-bearing capacity when guiding liquid; it also prevents the thread angle from being too small, resulting in a sharper thread tip and easier wear when guiding liquid. In this way, the overall load-bearing capacity and strength of the flow guide structure 34 can be guaranteed.

[0076] Based on the above, please refer to Figure 6 and Figure 7 The pump body 31 also includes a motor cavity 31d, which is connected to the impeller cavity 31a through a first through hole 31e. Based on this, the pump assembly 30 also includes a motor 35, which is a high-speed motor with a rotational speed greater than or equal to 10,000 rpm and less than or equal to 14,000 rpm. For example, the rotational speed of the motor 35 can be 10,000 rpm, 12,000 rpm, 14,000 rpm, etc. The motor 35 includes a motor body 351 and an output shaft 352. The motor body 351 is fitted and accommodated within the motor cavity 31d, and the output shaft 352 is connected to the motor body 351, forming at least a portion of the rotating shaft 32. In this way, the motor 35 can drive the first blade 33 and the guide structure 34 to rotate, thereby drawing in liquid from the inlet 31b and discharging liquid from the outlet 31c. Thus, the motor 35 can share the power supply of the cleaning equipment 100 with the aforementioned fan, and the overall structure of the cleaning equipment 100 is simple and easy to implement.

[0077] Figure 6 and Figure 7In the illustrated embodiment, the output shaft 352 passes through the first through hole 31e, and a portion of the output shaft 352 is located within the impeller cavity 31a. Furthermore, the pump assembly 30 also includes a bushing 36 and a seal 37. The bushing 36 is fitted and fixed to the output shaft 352, forming a rotating shaft 32. The first blade 33 and the second blade 341 are fixed to the outer circumferential surface of the bushing 36, meaning the output shaft 352 forms a part of the rotating shaft 32. Specifically, the first blade 33 and the second blade 341 can be fixed to the bushing 36 by snap-fit, threaded connection, bonding, welding, or other methods, or they can be integrally formed with the bushing 36. Thus, the first blade 33, the second blade 341, and the bushing 36 can form a single structural component, facilitating assembly with the output shaft 352. The seal 37 provides a sealing connection between the outer circumferential surface of the output shaft 352 and the inner circumferential surface of the first through hole 31e, preventing liquid from the impeller cavity 31a from entering the motor cavity 31d and damaging the motor 35.

[0078] In some other embodiments, the pump assembly 30 may not include the bushing 36, and the first blade 33 and the second blade 341 may be directly fixed to the outer circumferential surface of the output shaft 352, i.e., the output shaft 352 forms the entire rotating shaft 32. In still other embodiments, the motor 35 may be replaced by a hydraulic motor or a pneumatic motor, and the output shaft 352 of the hydraulic motor or pneumatic motor drives the first blade 33 and the second blade 341 to rotate.

[0079] Please refer to the following: Figures 6-8 The pump body 31 has a liquid outlet channel 31f communicating with the impeller cavity 31a, and one opening of the liquid outlet channel 31f forms the aforementioned liquid outlet 31c. Based on this, the pump body 31 includes a baffle portion 3111, which includes a first surface 3111a and a second surface 3111b facing away from each other. At least a portion of the first surface 3111a forms part of the inner wall surface of the motor cavity 31d, and the second surface 3111b forms part of the inner wall surface of the liquid outlet channel 31f.

[0080] In this way, when the liquid in the impeller cavity 31a enters the liquid outlet channel 31f under the action of the first blade 33 and is discharged through the liquid outlet 31c, the liquid can absorb the heat from the motor 35 in the motor cavity 31d through the baffle part 3111 to cool down the motor 35, thereby ensuring the reliability of the motor 35 and the overall reliability of the water pump assembly 30.

[0081] Specifically, the pump body 31 includes a pump body 311 and a surrounding plate 312. The impeller cavity 31a and the motor cavity 31d are both formed in the pump body 311, and a portion of the pump body 311 forms the aforementioned baffle portion 3111. The surrounding plate 312 is connected to the outer peripheral surface of the pump body 311 and is in contact with the baffle portion 3111. The surrounding plate 312 and the baffle portion 3111 enclose a liquid outlet channel 31f; wherein, the liquid outlet 31c is opened in the surrounding plate 312. Specifically, the surrounding plate 312 can be integrally formed with the pump body 31, or it can be connected to the pump body 31 by means of snap-fit, bonding, welding, etc.

[0082] Based on this, the ratio of the extension length of the intersection line between the second surface 3111b and the second plane to the extension length of the intersection line between the outer peripheral surface of the pump body 311 and the second plane is greater than or equal to 5%, where the second plane is a plane perpendicular to the axis of the rotating shaft 32 and passing through the motor cavity 31d. For example, the ratio of the extension length of the intersection line between the second surface 3111b and the second plane to the extension length of the intersection line between the outer peripheral surface of the pump body 311 and the second plane can be 5%, 6%, 7%, 8%, 9%, 10%, etc.

[0083] This allows the area of ​​the second surface 3111b to be as large as possible, thereby ensuring the efficiency of the liquid in the outlet channel 31f in cooling the motor 35, thus extending the service life of the motor 35 and ensuring the overall reliability of the water pump assembly 30.

[0084] Figures 6-8 In the illustrated embodiment, the motor cavity 31d has a generally circular cross-section in the second plane, the pump body 311 has a generally annular cross-section in the second plane that matches the motor cavity 31d, and the enclosure plate 312 has a generally arc-shaped cross-section in the second plane. In other embodiments, the cross-sections of the motor cavity 31d, the pump body 311, and the enclosure plate 312 may also have other shapes.

[0085] Figures 6-8 In the illustrated embodiment, the liquid outlet channel 31f extends linearly along the axial direction of the rotation shaft 32. In this case, the baffle portion 3111 also extends in a linear plate shape. The extension length of the intersection line between the second surface 3111b and the second plane is the circumferential extension length of the second surface 3111b along the rotation shaft 32. The extension length of the intersection line between the outer peripheral surface of the pump body 311 and the second plane is the circumference of the pump body 311 along the rotation shaft 31. This reduces the design and manufacturing difficulty of the pump body 31.

[0086] In some other embodiments, the liquid outlet channel 31f may also extend spirally around the motor cavity 31d. In this case, the baffle portion 3111 is also spirally extended in the shape of a plate. This increases the area of ​​the second surface 3111b, thereby increasing the heat exchange area between the liquid in the liquid outlet channel 31f and the motor 35, enhancing the cooling effect on the motor 35, extending the service life of the motor 35, and ensuring the overall reliability of the water pump assembly 30.

[0087] Please continue reading. Figures 6-8 The pump body 31 also includes a first cover plate 313 and a second cover plate 314. The first cover plate 313 is connected to one end of the pump body 311 to cover the opening communicating with the motor cavity 31d, and the second cover plate 314 is connected to the other end of the pump body 311 to cover the opening communicating with the impeller cavity 31a. The aforementioned liquid inlet 31b is opened on the second cover plate 314. Specifically, the first cover plate 313 and the second cover plate 314 can be connected to the pump body 311 by means of snap-fit, adhesive, threaded connection, etc.

[0088] Based on the above, please refer back to the previous section. Figure 3 and Figure 4 When the water pump assembly 30 is disposed within the first receiving cavity 10a of the water tank 120, the pump body 31 is fixed to the tank 10. Specifically, the pump body 311 can be fixed to the tank 10 by means of threaded connection or snap-fit. Based on this, the flow guiding structure 34 is located between the bottom wall 11 of the water tank 120 and the first blade 33, and both the flow guiding structure 34 and the liquid inlet 31b are spaced apart from the bottom wall 11. Specifically, the distance between the liquid inlet 31b and the bottom wall 11 is greater than or equal to 2 mm and less than or equal to 8 mm. For example, the distance between the liquid inlet 31b and the bottom wall 11 can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, etc.

[0089] This design prevents the water pump assembly 30 from having difficulty drawing liquid due to the close distance between the inlet 31b and the bottom wall 11. It also prevents residual water in a portion of the water tank 120's interior from entering the fan and damaging it, especially when the tank is partially connected to the aforementioned fan. Therefore, when the liquid level in the water tank 120 is greater than the sum of the root thickness of the second blade 341 and the distance between the inlet 31b and the bottom wall 11, the water pump assembly 30 can effectively draw and discharge liquid.

[0090] Based on the above, please refer to the following: Figure 3 , Figure 4 and Figure 9 , Figure 9 for Figure 3The diagram shows the structure of the tank body 10 of the water tank 120. The tank body 10 also includes a first partition 13, which is connected to the first side frame 12 and the bottom wall 11 to divide the first receiving cavity 10a into a first chamber 10a1 and a second chamber 10a2. The water tank 120 also includes a drain plate 21, which is disposed within the first chamber 10a1 and spaced apart from the bottom wall 11 of the tank body 10 to divide the first chamber 10a1 into a first cavity portion 10a11 and a second cavity portion 10a12. The bottom wall 11 of the tank body 10 forms part of the cavity wall of the second cavity portion 10a12. Based on this, the inlet 31b of the water pump assembly 30 is located within the second cavity portion 10a12, and the outlet 31c is located within the second chamber 10a2. Specifically, the pump body 311 of the water pump assembly 30 is fixed to the first partition 13 and located within the second chamber 10a2.

[0091] In this way, the first chamber 10a1 of the water tank 120 can be used as a solid-liquid separation chamber, and the drain plate 21 can separate the solid and liquid waste, so that the solid waste is located in the first chamber 10a11 and the liquid waste is located in the second chamber 10a12. Based on this, the second chamber 10a2 can be used as a waste liquid storage tank, and the water pump assembly 30 can discharge the liquid waste in the first chamber 10a1 into the second chamber 10a2 for storage, so as to facilitate the separate treatment of solid and liquid waste.

[0092] Please continue reading. Figure 3 and Figure 4 The drain basket 20 is detachably disposed within the first chamber 10a1. The drain basket 20 includes a second side frame 22 and the aforementioned drain plate 21. The second side frame 22 is connected to the drain plate 21 and is arranged around the drain plate 21 to form a second receiving cavity 20a. In this case, the second receiving cavity 20a can form the aforementioned first cavity 10a11. Thus, the second receiving cavity 20a can store solid waste. Based on this, the drain basket 20 can be removed from the first chamber 10a1 for easy and quick waste disposal.

[0093] Based on the above, please refer to the following: Figure 4 , Figure 9 and Figure 10 , Figure 10 for Figure 3 The diagram shows the structure of the cover 40 of the water tank 120. The tank 10 has a sewage inlet 10c and an exhaust outlet 10d. The sewage inlet 10c is connected to the first cavity 10a11. Specifically, the sewage inlet 10c can be located on the first side frame 12 and is connected to the first cavity 10a11 through a sewage inlet channel provided in the tank 10. The sewage inlet 10c is also connected to the sewage inlet channel of the aforementioned shell 1121. The exhaust outlet 10d can be located on the first side frame 12 and is connected to the aforementioned fan.

[0094] Based on this, the cover 40 is connected to the first side frame 12. The cover 40 can seal the first opening 10b to form a closed structure for the water tank 120. The cover 40 can also open the first opening 10b to facilitate cleaning of dirt inside the water tank 120. Specifically, the cover 40 can be rotatably connected to the first side frame 12 or detachably connected to the first side frame 12. The cover 40 has a first air duct structure 41. The air inlet 41a of the first air duct structure 41 is connected to the first cavity 10a11, and the air outlet 41b of the first air duct structure 41 is connected to the exhaust port 10d. Specifically, the air outlet 41b can be connected to the exhaust port 10d through an air duct structure provided inside the housing 10.

[0095] In this way, the fan draws dirt from the surface to be cleaned and / or the cleaning component 1122 into the first chamber 10a11 of the water tank 120. Solid dirt is stored in the first chamber 10a11, while liquid dirt can be discharged to the second chamber 10a2 through the water pump assembly 30. Airflow flows out of the water tank 120 through the first air duct structure 41 of the cover 40, achieving complete separation of gas, liquid, and solid. Furthermore, the water pump assembly 30 can discharge liquid dirt from the first chamber 10a1 into the second chamber 10a2 in real time, preventing residual liquid dirt in the first chamber 10a1 from splashing into the first air duct structure 41 or even damaging the fan. It also prevents the mixing of solid and liquid dirt from breeding bacteria and producing odors.

[0096] Please see Figure 11 , Figure 11 This is a schematic diagram of the structure of a cleaning system 1000 provided in some embodiments of this application. The cleaning system 1000 includes a base station 200 and the aforementioned cleaning device 100. The cleaning device 100 can detach from the base station 200 to clean the surface to be cleaned, and the cleaning device 100 can also remain on the base station 200 for maintenance. For example, the base station 200 can be used to provide a docking place for the cleaning device 100, charge the cleaning device 100, replenish water, and clean the cleaning device 100.

[0097] The above embodiments are illustrated using the water tank 120 as an example of a waste collection box for the cleaning device 100. In some other embodiments, the first receiving cavity 10a of the water tank 120 may not be divided into a first chamber 10a1 and a second chamber 10a2. For example, the water tank 120 may be a water storage tank or a fish tank. In this case, the outlet 31c of the water pump assembly 30 is connected to the outside of the water tank 120 so as to discharge as much water as possible from the water tank 120 to the outside of the water tank 120.

[0098] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A water pump assembly, characterized in that, include: The pump body has an impeller cavity, and an inlet and an outlet connected to the impeller cavity; A rotating shaft is disposed within the pump body and is rotatable relative to the pump body; The first blade is located inside the impeller cavity and fixed to the rotating shaft; A flow guiding structure is disposed on the rotating shaft and extends spirally around the rotating shaft, with at least a portion of the flow guiding structure located between the first blade and the liquid inlet; The flow guiding structure has a flow guiding surface, which forms a spiral surface. The flow guiding surface is used to guide the liquid to the first blade when the rotating shaft rotates relative to the pump body.

2. A water pump assembly, characterized in that, include: The pump body has an impeller cavity, and an inlet and an outlet connected to the impeller cavity; A rotating shaft is disposed within the pump body and is rotatable relative to the pump body; The first blade is located inside the impeller cavity and fixed to the rotating shaft; A flow guiding structure is disposed on the rotating shaft and extends spirally around the rotating shaft, and the flow guiding structure is located below the first blade; The flow guiding structure has a flow guiding surface that forms a spiral surface, and the flow guiding surface is used to deliver liquid to the first blade when the rotating shaft rotates relative to the pump body.

3. The water pump assembly according to claim 1 or 2, characterized in that, The flow guiding structure includes a second blade, which is fixed to the outer peripheral surface of the rotating shaft and extends spirally around the rotating shaft, with a portion of the surface of the second blade forming the flow guiding surface.

4. The water pump assembly according to claim 1 or 2, characterized in that, Along the axial direction of the rotation axis, the edge of the flow guiding structure away from the first blade is flush with the edge of the liquid inlet away from the first blade; or, the edge of the flow guiding structure away from the first blade is located on the side of the liquid inlet opposite to the first blade.

5. The water pump assembly according to claim 1 or 2, characterized in that, Along the radial direction of the rotation axis, the distance between the edge of the first blade away from the rotation axis and the axis of the rotation axis is a first distance; The ratio of the lead of the flow guiding structure to the first distance is greater than or equal to 1 / 5 and less than or equal to 1 / 3; and / or, The distance between the edge of the flow guide structure away from the axis of the rotation shaft and the axis of the rotation shaft is the second distance; the ratio of the second distance to the first distance is greater than or equal to 1 / 3 and less than or equal to 3 / 5.

6. The water pump assembly according to claim 1 or 2, characterized in that, The helix angle of the flow guiding structure is greater than or equal to 15° and less than or equal to 25°; and / or, The flow guiding structure has a cross-section in the first plane including a first side segment and a second side segment, both of which are connected to the outer peripheral surface of the rotating shaft; the included angle between the first side segment and the second side segment is greater than or equal to 17° and less than or equal to 27°.

7. The water pump assembly according to claim 1 or 2, characterized in that, The pump body also has a motor cavity; The water pump assembly also includes a motor, which includes a motor body and an output shaft. The motor body is fitted and accommodated within the motor cavity, and the output shaft forms at least a portion of the rotating shaft.

8. The water pump assembly according to claim 7, characterized in that, The pump body has a liquid outlet channel communicating with the impeller cavity, and one opening of the liquid outlet channel forms the liquid outlet. The pump body includes a baffle portion, which includes a first surface and a second surface facing away from each other. At least a portion of the first surface forms part of the inner wall surface of the motor cavity, and the second surface forms part of the inner wall surface of the liquid outlet channel.

9. The water pump assembly according to claim 8, characterized in that, The pump body includes: The pump body has the impeller cavity and the motor cavity formed therein, and a portion of the pump body forms the baffle portion. A surrounding plate is connected to the outer peripheral surface of the pump body and is in contact with the baffle portion. The surrounding plate and the second surface enclose the liquid outlet channel. Wherein, the ratio of the extension length of the intersection line of the second surface and the second plane to the extension length of the intersection line of the outer peripheral surface of the pump body and the second plane is greater than or equal to 5%, and the second plane is a plane that is perpendicular to the axis of the rotating shaft and passes through the motor cavity.

10. The water pump assembly according to claim 8 or 9, characterized in that, The liquid outlet channel extends axially along the rotation axis; or, The liquid outlet channel extends spirally around the motor cavity.

11. A water tank, characterized in that, include: A housing having a first receiving cavity and a first opening communicating with the first receiving cavity, the housing including a bottom wall opposite to the first opening; A water pump assembly is disposed within the first accommodating cavity, and the water pump assembly is the water pump assembly according to any one of claims 1-10; the flow guiding structure is located between the bottom wall and the first blade, and the flow guiding structure and the liquid inlet are both spaced apart from the bottom wall.

12. The water tank according to claim 11, characterized in that, The enclosure also includes: The first side frame is connected to the bottom wall and is arranged around the bottom wall to enclose the first receiving cavity; A first partition, the first partition being connected to the first side frame and the bottom wall, divides the first receiving cavity into a first chamber and a second chamber; The water tank also includes a drain plate, which is disposed in the first chamber and spaced apart from the bottom wall to divide the first chamber into a first cavity and a second cavity. The bottom wall forms part of the cavity wall of the second cavity. The liquid inlet is located in the second cavity, and the liquid outlet is located in the second cavity.

13. A cleaning device, characterized in that, include: The main body of the device is used to clean the surface to be cleaned. A water tank, wherein the water tank is the water tank as described in claim 11 or 12, is disposed in the main body of the equipment and is used to store dirt from the surface to be cleaned.

14. A cleaning system, characterized in that, include: Base station; The cleaning device is the cleaning device according to claim 13, and the cleaning device is capable of staying on the base station.

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