Water pump assembly and wet-type cleaning equipment

Abstract

The utility model discloses a water pump assembly and wet type cleaning equipment. The water pump assembly comprises a pump body, an impeller and a motor. The pump body defines a liquid storage cavity and an impeller cavity which communicate with each other. The impeller is at least partially arranged in the impeller cavity, and the impeller is configured to suck liquid in the liquid storage cavity into the impeller cavity and then convey the liquid to the liquid outlet. The motor comprises a driving shaft which is in transmission connection with the impeller and used for providing power for the impeller. The impeller comprises a first impeller and a second impeller located at the downstream of the first impeller, the first impeller is at least partially located in a communication channel between the liquid storage cavity and the impeller cavity, and the first impeller comprises at least one first blade; the second impeller comprises a plurality of second blades, the axial length of the first blades is larger than the radial length of the first blades, and the axial length of the second blades is smaller than the radial length of the second blades. By adopting the water pump assembly, the working performance of the water pump cannot be influenced even if a user uses high-temperature hot water. Meanwhile, the structure can ensure that the water pump assembly discharges water in time, and the use experience is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a water pump component and wet cleaning equipment. Background Art

[0002] Wet cleaning equipment generally includes a cleaning liquid supply system and a dirt recovery system. The cleaning liquid supply system includes a cleaning liquid tank and a water pump assembly. In order to achieve precise control of liquid delivery, the water pump assembly generally selects an electromagnetic pump to supply liquid through the electromagnetic pump.

[0003] In order to make cleaning more efficient, some users will add hot water with a relatively high temperature into the cleaning liquid tank. However, when the hot water passes through the electromagnetic pump, the high temperature will affect the magnetic field, which in turn will affect the operation of the pump and make the water output unstable. Utility Model Content

[0004] In view of the deficiencies existing in the above-mentioned technologies, the utility model provides a water pump assembly and a wet cleaning device, which can add hot water in the cleaning liquid tank to improve the cleaning efficiency.

[0005] In one aspect, the utility model provides a water pump assembly, comprising:

[0006] A pump body, wherein the pump body defines a liquid storage chamber and an impeller chamber that are interconnected;

[0007] an impeller, at least partially disposed in the impeller cavity, the impeller being configured to draw the liquid in the liquid storage cavity into the impeller cavity and then transport it to the liquid outlet;

[0008] A motor, comprising a drive shaft, the drive shaft being drivingly connected to the impeller and used to provide power to the impeller;

[0009] Wherein, the impeller includes a first impeller and a second impeller located downstream of the first impeller, the first impeller is at least partially located in the connecting channel between the liquid storage chamber and the impeller chamber, the first impeller includes at least one first blade; the second impeller includes a plurality of second blades, the axial length of the first blade is greater than its radial length, and the axial length of the second blade is less than its radial length.

[0010] Optionally, along the axial direction of the impeller, the length of the first blade is greater than the length of the second blade; along the radial direction of the impeller, the radial length of the second blade is greater than the radial length of the first blade.

[0011] Optionally, between the axial center position of the second impeller and the position of the liquid outlet, the width of the impeller chamber gradually decreases along the liquid flow direction.

[0012] Optionally, an extension direction of the liquid outlet and an extension direction of the connecting channel are substantially parallel.

[0013] Optionally, the pump body includes a first shell and a second shell, the first shell defines the liquid storage chamber, and the second shell and the first shell jointly define the impeller chamber.

[0014] Optionally, it further includes a housing for mounting the motor, the second housing is arranged on the housing and the first housing, and the housing cooperates with the first housing to mount the second housing to the first housing.

[0015] Optionally, the outer diameter of the first impeller is less than one third of the outer diameter of the second impeller.

[0016] Optionally, an axial length of the second impeller is less than half of the axial length of the first impeller.

[0017] On the other hand, the utility model also provides a wet cleaning device, comprising

[0018] The cleaning liquid supply system comprises the water pump assembly described above and a cleaning liquid tank connected to the water pump assembly, wherein the cleaning liquid tank is located directly above the water pump assembly.

[0019] Optionally, the opening of the liquid storage cavity faces upward, and the liquid storage cavity is directly connected to the water outlet of the cleaning liquid tank.

[0020] The utility model provides a water pump assembly and a wet cleaning device, the water pump assembly comprising a pump body, an impeller and a motor. The pump body defines a liquid storage chamber and an impeller chamber that are interconnected. The impeller is at least partially disposed in the impeller chamber, and the impeller is configured to suck the liquid in the liquid storage chamber into the impeller chamber and then transport it to the liquid outlet. The motor comprises a drive shaft, which is transmission-connected to the impeller and is used to provide power for the impeller. The impeller comprises a first impeller and a second impeller located downstream of the first impeller, the first impeller is at least partially located in a communication channel between the liquid storage chamber and the impeller chamber, the first impeller comprises at least one first blade; the second impeller comprises a plurality of second blades, the axial length of the first blade is greater than its radial length, and the axial length of the second blade is less than its radial length. With the above-mentioned water pump assembly, the working performance of the water pump will not be affected even if the user uses high-temperature hot water. At the same time, the structure can also ensure that the water pump assembly discharges water in time without affecting the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a fabric cleaning machine in one embodiment of the utility model;

[0022] Figure 2 This is a schematic structural diagram of a water pump assembly in one embodiment;

[0023] Figure 3 is a front view of a water pump assembly in one embodiment;

[0024] Figure 4 is a structural exploded view of a water pump assembly in one embodiment;

[0025] Figure 5 is a cross-sectional view along the axial direction of an embodiment;

[0026] Figure 6 for Figure 5 A magnified view of the structure in the middle A area;

[0027] Figure 7 is a schematic structural diagram of the first shell;

[0028] Figure 8 is a diagram showing the relative position relationship between the first housing and the housing of the motor;

[0029] Fig. 9 It is a schematic diagram of the structure of the water pump assembly with the impeller exposed in one embodiment;

[0030] Fig.10 is a schematic diagram of the structure of an impeller in one embodiment;

[0031] Fig.11 A schematic diagram of the structure in which the cleaning liquid tank is removed from the equipment;

[0032] Fig.12 This is a schematic diagram of the structure of a sweeping machine in one embodiment;

[0033] Fig.13 Schematic diagram of the structure of a floor scrubber in one embodiment. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that if a directional indication is involved in the embodiments of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0038] refer to Figure 1 , the figure discloses a wet cleaning device 100 (fabric cleaning machine), which is mainly used for wet cleaning of fabric furniture such as carpets, sofas, mattresses, etc. Of course, the cleaning device can also be a sweeping robot or a floor scrubber, etc. ( Fig.12 and 13 ). The wet cleaning device 100 generally includes a cleaning liquid supply system and a dirt recovery system. The cleaning liquid supply system includes a cleaning liquid tank 10 containing cleaning liquid and a water pump assembly 20 in fluid communication with the cleaning liquid tank 10. The water pump assembly 20 pumps the cleaning liquid to the surface to be cleaned. The dirt recovery system includes a suction motor 30 and a recovery tank, and the suction airflow generated by the suction motor 30 recovers the dirt into the recovery tank. Figure 2-11The water pump assembly 20 includes a pump body 21, an impeller 2 and a motor 30. The pump body 21 defines a liquid storage chamber 22 and an impeller chamber 23 that are interconnected. At least part of the impeller 2 is disposed in the impeller chamber 23, and the impeller 2 is configured to suck the liquid in the liquid storage chamber 22 into the impeller chamber 23 and then deliver it to the liquid outlet 25. The motor 30 includes a drive shaft 31, which is transmission-connected to the impeller 2 and is used to provide power for the impeller 2; the impeller chamber 23 includes a stirring area 231 for accommodating the impeller 2 and a delivery area 232 located between the stirring space and the liquid outlet 25. The liquid in the stirring area 231 in the impeller chamber 23 enters the delivery area 232 under the stirring action of the impeller 2, and then flows out from the liquid outlet 25. When the cleaning liquid tank 10 is docked to the liquid storage tank, or when there are bubbles in the cleaning liquid tank 10, some bubbles will stay in the connecting passage 24 between the liquid storage chamber 22 and the impeller chamber 23, causing the liquid to not enter the impeller chamber 23 for a long time. In order to ensure that the liquid in the liquid storage chamber 22 can quickly reach the impeller chamber 23, the structure of the impeller 2 is specially designed. Specifically, the impeller 2 includes a first impeller 26 and a second impeller 28 located downstream of the first impeller 26, the first impeller 26 is at least partially located in the connecting passage 24 between the liquid storage chamber 22 and the impeller chamber 23, and the first impeller 26 includes at least one first blade 27. The number of the first blade 27 can be multiple, distributed along the axial direction. The number of the first blade 27 can also be one, and a single blade can be designed to be spiral. The second impeller 28 includes a plurality of second blades 29, the axial length of the first blade 27 is greater than its radial length, and the axial length of the second blade 29 is less than its radial length.

[0039] refer to Fig. 9 and 10 , Fig. 9 The direction of the arrow is the impeller rotation direction. Fig.10 The X direction is the axial direction of the blade, and the Y direction is the radial direction of the blade. In a specific embodiment, the second blade 29 includes a first edge 281 and a second edge 282 that are arranged opposite to each other. Along the rotation direction of the impeller 2, the first edge 281 squeezes the liquid, and the length of the first edge 281 is greater than the length of the second edge 282.

[0040] The radial length of the first impeller 26 is substantially the same as the length of the communication channel 24. The first impeller 26 includes a connection end connected to the second impeller 28 and a suspended end away from the second impeller 28. Along the extension direction from the connection end to the suspended end, the radial length of the first blade 27 located at the suspended end gradually decreases. Since the suspended end of the first blade 27 is designed to be relatively sharp, it can effectively break up bubbles and guide the liquid to flow through the flow channel.

[0041] Continue to refer Fig.10In one embodiment, in order to ensure that the fluid can be pumped smoothly to the surface to be cleaned. The blades of the impeller 2 are specially designed. Along the axial direction of the impeller 2, the length of the first blade 27 is greater than the length of the second blade 29; along the radial direction of the impeller 2, the radial length of the second blade 29 is greater than the radial length of the first blade 27. The use of the slender first blade 27 can effectively ensure that the fluid flows smoothly from the liquid storage chamber 22 into the impeller chamber 23. The use of the second blade 29 with a relatively large radius can more quickly transport the fluid to the liquid outlet 25. Furthermore, the outer diameter of the first impeller 26 is less than one-third of the outer diameter of the second impeller 28. In this way, the fluid can pass through the circulation channel quickly. The axial length of the second impeller 28 is less than half of the axial length of the first impeller 26. This design can ensure that the fluid flows out of the impeller chamber 23 quickly.

[0042] refer to Figure 7-9 , between the axial position of the second impeller 28 and the position of the liquid outlet 25, the width of the impeller chamber 23 gradually decreases along the liquid flow direction. The delivery area 232 of the impeller chamber 23 is configured as a flow channel, the width of which is smaller than the stirring area 231, and the width gradually decreases along the flow direction of the fluid, which can help the liquid to flow quickly to the liquid outlet 25. Further, in one embodiment, the delivery area 232 is arranged tangentially to the stirring area 231 as a whole, so that the high-speed rotating impeller 2 can quickly deliver the fluid to the liquid outlet 25.

[0043] refer to Figure 6 In order to make the structure more compact and occupy a smaller installation space, the extension direction of the liquid outlet 25 is substantially parallel to the extension direction of the connecting channel 24. The connecting channel 24 is as short as possible, which can effectively reduce the existence time of bubbles and ensure the smooth transportation of the fluid.

[0044] refer to Figure 2-8Specifically, the pump body 21 includes a first shell 211 and a second shell 212. The first shell 211 defines a liquid storage chamber 22. The second shell 212 and the first shell 211 jointly define an impeller chamber 23. The first shell 211 and the second shell 212 are sealed and connected via a sealing ring. The second shell 212 can be directly fixed to the first shell 211 or indirectly fixed to the first shell 211. The water pump assembly 20 also includes a housing 33 for mounting the motor 30. The second shell 212 is disposed between the housing 33 and the first shell 211. The housing 33 cooperates with the first shell 211 to mount the second shell 212 to the first shell 211. During installation, the second housing 212 is first placed at the installation position defined by the first housing 211, and the impeller chamber 23 is initially formed between the two. Then, the housing 33 of the motor 30 is docked to the second housing 212, and the housing 33 is fastened to the first housing 211 by means of bolts, buckles, etc. In this way, under the extrusion of the housing 33 and the first housing 211, the second housing 212 is in close contact with the first housing 211, and an effective seal can be formed between the two. This installation method is not only simple to install and reliable in sealing, but also can make the structure of the water pump assembly 20 more compact, effectively reducing the installation space of the water pump assembly 20.

[0045] refer to Fig.11 Specifically, in the embodiment shown in the figure, the wet cleaning device 100 includes a cleaning liquid supply system, and the cleaning liquid supply system includes a water pump assembly 20 in any of the above embodiments and a cleaning liquid tank 10 connected to the water pump assembly 20, and the cleaning liquid tank 10 is located directly above the water pump assembly 20. At this time, the opening 221 of the liquid storage chamber faces directly upward, and the liquid storage chamber 22 directly connects to the water outlet of the cleaning liquid tank 10. The cleaning liquid tank 10 is provided with an outwardly protruding liquid outlet 25, and the liquid outlet 25 can directly extend into the liquid storage chamber 22. The switch structure in the liquid storage chamber 22 can open the valve of the liquid outlet 25, and the liquid flows from the cleaning liquid tank 10 into the liquid storage chamber 22 under the action of gravity. When the water pump assembly 20 is not started, there may be some bubbles in the liquid storage chamber 22. When the motor 30 of the water pump assembly 20 starts running, the first blade 27 rotates to break up any bubbles that may exist, thereby guiding the liquid to the impeller chamber 23. The second blade 29 in the impeller chamber 23 rotates rapidly to squeeze the liquid in the impeller chamber 23, generating an extrusion force to transport the liquid to the surface to be cleaned.

[0046] Of course, the water pump assembly 20 can also be used in cleaning appliances such as floor scrubbers and sweeping robots. Fig.12 and Fig.13 These are schematic diagrams of a floor scrubber and a sweeping robot, which will not be described in detail here.

[0047] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described here.

Claims

1. A water pump assembly, characterized in that: include: A pump body, wherein the pump body defines a liquid storage chamber and an impeller chamber that are interconnected; an impeller, at least partially disposed in the impeller cavity, the impeller being configured to draw the liquid in the liquid storage cavity into the impeller cavity and then transport it to the liquid outlet; A motor, comprising a drive shaft, the drive shaft being drivingly connected to the impeller and used to provide power to the impeller; Wherein, the impeller includes a first impeller and a second impeller located downstream of the first impeller, the first impeller is at least partially located in the connecting channel between the liquid storage chamber and the impeller chamber, the first impeller includes at least one first blade; the second impeller includes a plurality of second blades, the axial length of the first blade is greater than its radial length, and the axial length of the second blade is less than its radial length.

2. The water pump assembly according to claim 1, characterized in that: Along the axial direction of the impeller, the length of the first blade is greater than the length of the second blade; along the radial direction of the impeller, the radial length of the second blade is greater than the radial length of the first blade.

3. The water pump assembly according to claim 1 or 2, characterized in that: Between the axial center position of the second impeller and the position of the liquid outlet, the width of the impeller cavity gradually decreases along the liquid flow direction.

4. The water pump assembly according to claim 1 or 2, characterized in that: An extending direction of the liquid outlet is substantially parallel to an extending direction of the communication channel.

5. The water pump assembly according to claim 1 or 2, characterized in that: The pump body includes a first shell and a second shell. The first shell defines the liquid storage chamber. The second shell and the first shell together define the impeller chamber.

6. The water pump assembly according to claim 5, characterized in that It also includes a housing for installing the motor, the second shell is arranged on the housing and the first shell, and the housing cooperates with the first shell to install the second shell to the first shell.

7. The water pump assembly according to claim 1 or 2, characterized in that: The outer diameter of the first impeller is smaller than one third of the outer diameter of the second impeller.

8. The water pump assembly according to claim 1 or 2, characterized in that: The axial length of the second impeller is less than half of the axial length of the first impeller.

9. A wet cleaning device, characterized in that: include: A cleaning liquid supply system, comprising a water pump assembly as described in any one of claims 1 to 8 and a cleaning liquid tank connected to the water pump assembly, wherein the cleaning liquid tank is located directly above the water pump assembly.

10. The wet cleaning device according to claim 9, characterized in that The opening of the liquid storage cavity faces upward, and the liquid storage cavity is directly connected to the water outlet of the cleaning liquid tank.

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