Water pump module and liquid heating device

Abstract

This utility model relates to the field of household appliance technology, providing a water pump module and a liquid heating device. The water pump module includes: a housing with an inlet and an outlet, and a working chamber communicating with the inlet and outlet; a water-blocking assembly connected to the housing and covering the opening of the working chamber; an impeller disposed within the working chamber; and a drive assembly including a drive member and a drive shaft, the first end of the drive shaft being connected to the drive end of the drive member, and the second end of the drive shaft passing through the water-blocking assembly and connected to the impeller, thereby driving the impeller to rotate around the water-blocking assembly within the working chamber to guide fluid flowing in from the inlet to the outlet. The water pump module proposed in this utility model connects the impeller and the drive member via a drive shaft, enabling the drive member to directly drive the impeller to rotate within the working chamber. This simplifies the structure of the water pump module, reduces internal wear, and extends the overall service life of the water pump module.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a water pump module and a liquid heating device. Background Technology

[0002] With the increasing popularity of household appliances such as electric water heaters, users have placed higher demands on the health and durability of water-contacting components. Traditional electric water heater pump modules use a magnetic coupling transmission method: a permanent magnet is fixed on the motor shaft, and a corresponding permanent magnet is embedded in the impeller. The alternating magnetic field generated by the motor's rotation drives the impeller to rotate synchronously around the support shaft, thus achieving fluid transport. However, the pump module requires high precision from both the impeller and the support shaft on which it is mounted; long-term operation easily leads to wear and tear, affecting the pump module's lifespan. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a water pump module that employs an impeller and connects a drive assembly to the impeller via a transmission, enabling the drive assembly to directly drive the impeller to rotate around the water-blocking assembly within the working chamber. This simplifies the water pump module structure, reduces internal wear, and extends the overall service life of the water pump module.

[0004] This utility model also proposes a liquid heating device.

[0005] The water pump module according to the first aspect of the present invention includes:

[0006] The shell has an inlet and an outlet, and a working cavity communicating with the inlet and the outlet is formed inside the shell;

[0007] A water-proof assembly is connected to the housing and covers the opening of the working chamber;

[0008] An impeller is disposed within the working chamber and is rotatably mounted on the water-proof assembly;

[0009] The drive assembly includes a drive element and a drive shaft. A first end of the drive shaft is connected to the drive end of the drive element, and a second end of the drive shaft passes through the water-blocking assembly and is connected to the impeller to drive the impeller to rotate within the working chamber, thereby discharging fluid flowing in from the inlet to the outlet.

[0010] The water pump module proposed in this utility model connects the impeller and the driving component through a drive shaft, enabling the impeller to rotate directly in the working chamber using the driving component. This simplifies the structure of the water pump module, reduces internal wear, and extends the service life of the entire water pump module.

[0011] According to one embodiment of the present invention, the impeller is a metal impeller or a ceramic impeller, a blade is formed on a first side of the impeller, and the second side of the impeller is connected to the drive assembly.

[0012] In this embodiment, the impeller operates efficiently under the action of the drive component, while the blade layout optimizes the fluid flow path, improving the performance and stability of the pump module.

[0013] According to one embodiment of the present invention, a first rib is formed on the second side of the impeller, and a first mounting groove is provided in the first rib.

[0014] The drive assembly further includes: a fixing sleeve fitted into the first mounting groove; the second end of the drive member passes through the waterproof assembly and is fixed in the fixing sleeve.

[0015] According to one embodiment of the present invention, the waterproofing component includes:

[0016] The baffle plate has a second rib formed on the side away from the impeller, and the second rib has a second mounting groove, and the second mounting groove has a through hole that penetrates the baffle plate.

[0017] The first sealing element is disposed within the second mounting groove;

[0018] The second end of the drive shaft passes through the first seal and the through hole in the second mounting groove and is fixed in the fixing sleeve. The first seal is fitted on the outer periphery of the second end of the drive shaft in an interference fit manner.

[0019] This embodiment enhances the connection strength between the drive shaft and the impeller by using a fixing sleeve, reducing performance degradation caused by loosening or displacement.

[0020] According to one embodiment of the present invention, the water-blocking plate is a plastic water-blocking plate, a metal water-blocking plate, or a ceramic water-blocking plate.

[0021] According to one embodiment of the present invention, a recessed groove is formed on the water-blocking plate, and the water pump module further includes a sealing ring, one side of which is in close contact with the side wall of the recessed groove, and the other side of which is in close contact with the housing.

[0022] In this embodiment, by setting a sealing ring between the impeller and the baffle plate, and combining it with a recessed groove design, the water pump module can ensure the sealing of the working chamber, while allowing the impeller to have a slight offset during rotation.

[0023] According to one embodiment of the present invention, the housing includes:

[0024] The shell body comprises a water inlet pipe and a water outlet pipe; the working cavity is formed within the shell body, the water inlet is formed on the side of the shell body opposite to the opening, and the water outlet is formed on the side of the shell body extending tangentially along the inner wall of the working cavity; the water inlet is connected to the water inlet pipe, and the water outlet is connected to the water outlet pipe.

[0025] According to one embodiment of the present invention, the inlet pipe, the outlet pipe, and the shell body are all metal or ceramic parts.

[0026] According to one embodiment of the present invention, the water pump module further includes: a fixed base having an installation space, one side of which is connected to the housing and the other side of which is connected to the drive assembly, a portion of the impeller being disposed within the installation space, and the drive end of the drive assembly being disposed within the installation space for transmission connection with the impeller.

[0027] In this embodiment, the mounting space formed by the fixed base accommodates a portion of the impeller and the drive end of the drive assembly, so that the drive end of the entire drive assembly can be sealed within the mounting space, avoiding external interference with the movement of the drive assembly.

[0028] A liquid heating device according to a second aspect embodiment of the present invention includes:

[0029] The container comprises a container, a heating module, and a water pump module; the container forms a liquid storage chamber; the heating module is located in the liquid storage chamber, and the working chamber is connected to the liquid storage chamber through the water inlet.

[0030] The liquid heating device proposed in this invention utilizes a water pump module to draw water from the storage chamber, thereby achieving a water pumping function. Furthermore, the water pump module of this liquid heating device connects the impeller and the drive component via a drive shaft, allowing the drive component to directly drive the impeller to rotate within the working chamber. This simplifies the structure of the water pump module, reduces internal wear, and extends the overall service life of the water pump module.

[0031] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is a three-dimensional structural schematic diagram of the impeller module provided in an embodiment of the present utility model.

[0034] Figure 2 This is an exploded structural diagram of the impeller module provided in an embodiment of this utility model.

[0035] Figure 3 This is one of the cross-sectional structural schematic diagrams of the impeller module provided in this embodiment of the utility model.

[0036] Figure 4 This is the second cross-sectional structural schematic diagram of the impeller module provided in this embodiment of the utility model.

[0037] Figure 5 This is a schematic diagram of the liquid heating device provided in an embodiment of the present invention.

[0038] Figure label:

[0039] 1. Water pump module; 11. Housing; 111. Inlet pipe; 112. Outlet pipe; 113. Housing body; 12. Waterproof assembly; 121. Waterproof plate; 1211. Recessed groove; 1212. Second rib; 122. First seal; 13. Impeller; 131. First rib; 14. Drive assembly; 141. Drive component; 142. Drive shaft; 143. Fixing sleeve;

[0040] 2. Container; 21. Liquid storage chamber. Detailed Implementation

[0041] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not 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 utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0043] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] The following is combined with Figures 1 to 5 This application describes a water pump module 1 and a liquid heating device. The water pump module 1 in this application provides power to the liquid heating device to deliver hot water. While the water pump module 1 is applied to an electric kettle, it should be understood that the liquid heating device can also be applied to an electric water cup, an electric tea maker, an electric water dispenser, or any other suitable device.

[0046] In one embodiment of this application, such as Figures 1 to 3 As shown, the water pump module 1 includes: a housing 11, a water-blocking assembly 12, an impeller 13, and a drive assembly 14. The housing 11 has an inlet and an outlet, and a working chamber communicating with the inlet and outlet is formed inside the housing 11; the water-blocking assembly 12 is connected to the housing 11 and covers the opening of the working chamber; the impeller 13 is disposed in the working chamber; the drive assembly 14 includes a drive member 141 and a drive shaft 142, the first end of the drive shaft 142 is connected to the drive end of the drive member 141, and the second end of the drive shaft 142 passes through the water-blocking assembly 12 and is connected to the impeller 13 to drive the impeller 13 to rotate in the working chamber, so as to guide the fluid flowing in from the inlet to the outlet.

[0047] In this embodiment, the housing 11 is the external structure of the water pump module 1, and it has a working chamber, an inlet, and an outlet. The working chamber is connected to the inlet and outlet, providing space for the impeller 13 to move. The impeller 13 is installed inside the working chamber, above the water-blocking assembly 12. During operation, the drive assembly 14 is activated, and after being powered on, it directly drives the impeller 13 to rotate, causing the impeller 13 to rotate at high speed on the positioning shaft of the working chamber. The rotation of the impeller 13 generates centrifugal force, drawing fluid into the working chamber from the inlet. The fluid is accelerated by the impeller 13 and discharged through the outlet.

[0048] To ensure the stability and reliability of the connection, the second end of the drive shaft 142 is typically fixed to the impeller 13 via a threaded connection. This method effectively transmits driving force while avoiding performance degradation due to loosening or displacement. Specifically, the second end of the drive shaft 142 is threaded to the impeller 13. The drive shaft 142 has external threads, and the impeller 13 has a corresponding threaded hole. The second end of the drive shaft 142 is inserted into the threaded hole of the impeller 13, and by rotating either the drive shaft 142 or the impeller 13, the threads engage, achieving a secure connection.

[0049] The water pump module 1 proposed in this utility model connects the impeller 13 and the drive component 141 through the drive shaft 142, so that the impeller 13 can be directly driven to rotate in the working chamber by the drive component 141. While simplifying the structure of the water pump module 1, it reduces the wear inside the water pump module 1 and improves the service life of the entire water pump module.

[0050] It should be noted that in this embodiment, the water-contacting components (such as the housing 11) can be made of hard materials such as metal or ceramic. These materials have good corrosion resistance, high temperature resistance, and mechanical strength, which can avoid the problems of plastic parts easily undergoing thermal deformation, aging, or even releasing harmful substances when in contact with high-temperature water.

[0051] In some embodiments, such as Figure 3 and Figure 4 As shown, the impeller 13 is generally made of metal or ceramic. Blades are formed on the first side of the impeller 13 to accelerate the fluid and generate centrifugal force. The second side of the impeller 13 is directly connected to the drive assembly 14, achieving high-speed rotation of the impeller 13 through a transmission relationship. The side of the impeller 13 facing away from the baffle assembly 12 is the first side, and the side of the impeller 13 closest to the baffle assembly 12 is the second side. This design allows the impeller 13 to operate efficiently under the action of the drive assembly 14, while the blade layout optimizes the fluid flow path, improving the performance and stability of the pump module 1.

[0052] In another embodiment, such as Figure 3As shown, a first rib 131 is formed on the second side of the impeller 13, and a first mounting groove is provided in the first rib 131; the drive assembly 14 also includes a fixing sleeve 143, which is sleeved in the first mounting groove; the second end of the drive member 141 passes through the water-proof assembly 12 and is fixed in the fixing sleeve 143.

[0053] In this embodiment, blades are formed at the top of the impeller 13, and a first rib 131 is formed at the bottom of the impeller 13, with a first mounting groove provided within the first rib 131. The first rib 131 increases the structural strength of the impeller 13 and provides an installation position for the fixing sleeve 143. The fixing sleeve 143 is typically made of metal or other high-strength materials, possessing good wear resistance and mechanical strength. The outer diameter of the fixing sleeve 143 matches the inner diameter of the first mounting groove, ensuring that the fixing sleeve 143 can be tightly fitted into the first mounting groove. The second end of the drive shaft 142 is fixed in the fixing sleeve 143 by a threaded connection, key connection, or other mechanical connection method.

[0054] In this embodiment, the use of the fixing sleeve 143 enhances the connection strength between the drive shaft 142 and the impeller 13, reducing performance degradation caused by loosening or displacement.

[0055] like Figure 2 and Figure 3 As shown, the water-blocking assembly 12 includes: a water-blocking plate 121. A second rib 1212 is formed on the side of the water-blocking plate 121 away from the impeller 13. A second mounting groove is provided in the second rib 1212, and a through hole is provided in the second mounting groove. A first sealing member 122 is disposed in the second mounting groove. The second end of the drive shaft 142 passes through the first sealing member 122 in the second mounting groove and the through hole in sequence and is fixed in the fixing sleeve 143. The first sealing member 122 is sleeved on the outer periphery of the second end of the drive shaft 142 in an interference fit manner.

[0056] The baffle plate 121 has a second rib 1212 on one side, and a second mounting groove is provided inside the second rib 1212. A through hole is provided in the second mounting groove to pass through the baffle plate 121 for the drive shaft 142 to pass through and be installed. A first seal 122, typically an oil seal, is installed in the second mounting groove. The oil seal is in close contact with the drive shaft 142 to form a seal. The oil seal is usually made of oil-resistant rubber or similar materials, possessing good wear resistance and corrosion resistance, effectively preventing fluid leakage. The second end of the drive shaft 142 passes through the oil seal and the through hole in the second mounting groove in sequence, and is finally fixed in the fixing sleeve 143 of the impeller 13. The oil seal ensures that the drive shaft 142 rotates axially even when it is rotating. This embodiment ensures a stable connection of the drive shaft 142, and at the same time, prevents fluid leakage from the gap between the baffle assembly 12 and the drive shaft 142 through the sealing effect of the oil seal.

[0057] Depending on the requirements, the water-separating plate 121 can be made of plastic, metal, or ceramic. For example, when using a plastic water-separating plate 121, to prevent direct contact between the plastic and the fluid, a metal plate can be fitted onto the outer surface of the water-separating plate 121, and the edges can be wrapped. This avoids the problem of thermal deformation, aging, or even the release of harmful substances that can easily occur when plastic parts come into contact with high-temperature liquids. The metal water-separating plate 121 can withstand greater pressure and mechanical stress, making it suitable for applications requiring high strength and stability. Ceramic materials can withstand extremely high temperatures, making them suitable for applications in high-temperature environments. Both metal and ceramic water-separating plates 121 have their advantages and disadvantages, and the choice should be made based on the specific application scenario and requirements.

[0058] In addition, the drive shaft 142 and the impeller 13 can also be joined by welding or bonding. Welding provides extremely high connection strength, ensuring a secure connection between the drive shaft 142 and the impeller 13. Bonding provides sufficient connection strength and is particularly suitable for materials or structures where welding is not advisable.

[0059] In some embodiments, such as Figure 2 and Figure 3 As shown, a recessed groove 1211 is formed on the water baffle 121. The water pump module 1 also includes a sealing ring, one side of which is in close contact with the side wall of the recessed groove 1211, and the other side of which is in close contact with the housing 11. The sealing ring is usually made of corrosion-resistant and wear-resistant materials, such as fluororubber, silicone rubber, or polytetrafluoroethylene.

[0060] like Figure 2 As shown, the baffle plate 121 has a recessed groove 1211 for accommodating the sealing ring and the bottom edge of the impeller 13. The sealing ring is arranged circumferentially around the housing 11, and the entire bottom edge of the housing 11 is fitted into the recessed groove 1211 to accommodate the sealing ring. During the rotation of the impeller 13, the sealing ring is tightly fitted to the housing 11 to prevent fluid leakage from the working chamber.

[0061] In some embodiments, such as Figures 1 to 3 As shown, the shell 11 includes: a shell body 113, a water inlet pipe 111, and a water outlet pipe 112; a working cavity is formed inside the shell body 113, a water inlet is formed on the side of the shell body 113 opposite to the opening, and a water outlet is formed on the side of the shell body 113 extending tangentially along the inner wall of the working cavity; the water inlet is connected to the water inlet pipe 111, and the water outlet is connected to the water outlet pipe 112.

[0062] In this embodiment, the inlet pipe 111 can be curved as needed to facilitate adjustment of the water inlet direction. Alternatively, it can be straight. A straight inlet pipe 111 helps reduce fluid resistance and vortices in the pipe, thereby improving fluid flow efficiency. More importantly, the straight inlet pipe 111 facilitates the return of air bubbles generated within the impeller assembly's working chamber. This helps reduce the negative impact of air bubbles on pumping efficiency, as air bubbles reduce fluid density and pumping efficiency. Simultaneously, the tangential outlet design increases fluid discharge efficiency, improving the pumping efficiency of the high-efficiency pump module 1.

[0063] Generally, the housing 113, inlet pipe 111, and outlet pipe 112 are all metal components, ensuring the strength and durability of the assembly. Simultaneously, the metal material of the housing 113, inlet pipe 111, and outlet pipe 112 avoids the problems of thermal deformation, aging, and even the release of harmful substances from plastic components when exposed to high-temperature water. The inlet pipe 111 and outlet pipe 112 are connected to the housing 113 via welding, forming a continuous metal interface that provides excellent sealing performance. This helps prevent fluid leakage at the connection point, ensuring the efficiency and performance of the water pump module 1. The welding process also provides strong connection strength, enabling the water pump module 1 to withstand high operating pressures and fluid impact forces.

[0064] Furthermore, the shell body 113, inlet pipe 111, and outlet pipe 112 can also be made of ceramic components. Ceramic materials possess excellent corrosion resistance, high-temperature resistance, and mechanical strength, effectively preventing corrosion problems that may occur with metal materials under certain special environments. The high hardness and low coefficient of friction of ceramic materials enable them to maintain good performance during long-term use, reducing wear and maintenance costs. The surface of ceramic components typically has a high degree of smoothness, which helps reduce fluid resistance in the pipes and improve fluid flow efficiency. In addition, the low coefficient of thermal expansion of ceramic materials allows them to maintain structural stability in high-temperature environments, avoiding loose connections or leaks caused by thermal expansion.

[0065] like Figure 1 and Figure 2 As shown, the water pump module 1 also includes a mounting base. The mounting base forms an installation space, with one side connected to the housing 11 and the other side connected to the drive assembly 14. A portion of the impeller 13 is disposed within the installation space, and the drive end of the drive assembly 14 is disposed within the installation space for transmission connection with the impeller 13.

[0066] In this embodiment, the mounting base is typically made of metal or high-strength plastic to ensure sufficient strength and rigidity to withstand the torque and vibration of the drive assembly 14. The upper surface of the mounting base is connected to the housing 11, and the lower surface of the mounting base is connected to the drive assembly 14. The mounting base forms an installation space to accommodate a portion of the impeller 13 and the drive end of the drive assembly 14, so that the entire drive end of the drive assembly 14 can be enclosed within the installation space to prevent external interference with the movement of the drive assembly 14.

[0067] Meanwhile, the connection between the mounting base and the housing 11 and the drive assembly 14 is usually provided with a seal (such as an O-ring or gasket) to prevent fluid leakage and ensure the sealing performance of the water pump module 1.

[0068] The application also provides a liquid heating device, which can be an electric kettle, an electric water cup, an electric tea stove, or an electric water dispenser. Figure 5 As shown, the liquid heating device includes: a container 2, a heating module, and a water pump module 1; the container 2 forms a liquid storage chamber 21; the heating module is located in the liquid storage chamber 21, and the working chamber is connected to the liquid storage chamber 21 through a water inlet. The structure of the water pump module 1 can be found in the above description. Figures 1 to 4 The relevant textual descriptions will not be repeated here.

[0069] When the liquid heating device is working, the drive assembly 14 starts and drives the impeller 13 to rotate in the working chamber. The rotation of the impeller 13 generates centrifugal force, which draws water from the liquid storage chamber 21 into the working chamber through the inlet. The water is pushed by the impeller 13 in the working chamber and discharged through the outlet, thereby realizing the water pumping function.

[0070] The liquid heating device proposed in this invention utilizes a water pump module 1 to draw water from the storage chamber 21, thereby achieving a water pumping function. Furthermore, the water pump module 1 of this liquid heating device connects the impeller 13 and the drive component 141 via a drive shaft 142, allowing the drive component 141 to directly drive the impeller 13 to rotate within the working chamber. This simplifies the structure of the water pump module 1, reduces internal wear, and extends the overall service life of the water pump module.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A water pump module (1), characterized in that, include: The housing (11) has an inlet and an outlet, and a working cavity communicating with the inlet and the outlet is formed inside the housing (11); A water-proof component (12) is connected to the housing (11) and covers the opening of the working chamber; Impeller (13) is disposed in the working chamber; The drive assembly (14) includes a drive member (141) and a drive shaft (142). The first end of the drive shaft (142) is connected to the drive end of the drive member (141), and the second end of the drive shaft (142) passes through the water-blocking assembly (12) and is connected to the impeller (13) to drive the impeller (13) to rotate in the working chamber so as to guide the fluid flowing in from the inlet to the outlet.

2. The water pump module (1) according to claim 1, characterized in that The impeller (13) is a metal impeller or a ceramic impeller. A blade is formed on the first side of the impeller (13), and the second side of the impeller (13) is connected to the drive assembly (14).

3. The water pump module (1) according to claim 1, characterized in that The second side of the impeller (13) has a first rib (131) and a first mounting groove is provided in the first rib (131); The drive assembly (14) further includes: a fixing sleeve (143) fitted into the first mounting groove; the second end of the drive member (141) passes through the waterproof assembly (12) and is fixed in the fixing sleeve (143).

4. The water pump module (1) according to claim 3, characterized in that The waterproof component (12) includes: A second rib (1212) is formed on the side of the baffle plate (121) away from the impeller (13). The second rib (1212) is provided with a second mounting groove and a through hole penetrating the baffle plate (121). The first sealing element (122) is disposed in the second mounting groove; The second end of the drive shaft (142) passes through the first seal (122) in the second mounting groove and the through hole and is fixed in the fixing sleeve (143). The first seal (122) is fitted on the outer periphery of the second end of the drive shaft (142) in an interference fit manner.

5. The water pump module (1) according to claim 4, characterized in that The water-blocking plate (121) is a plastic water-blocking plate, a metal water-blocking plate, or a ceramic water-blocking plate.

6. The water pump module (1) according to claim 4, characterized in that A recessed groove (1211) is formed on the water baffle plate (121). The water pump module (1) also includes a sealing ring, one side of which is in close contact with the side wall of the recessed groove (1211), and the other side of which is in close contact with the housing (11).

7. The water pump module (1) according to claim 1, characterized in that The housing (11) includes: The shell body (113), the inlet pipe (111), and the outlet pipe (112) are provided. The working cavity is formed inside the shell body (113). The inlet is formed on the side of the shell body (113) opposite to the opening. The outlet is formed on the side of the shell body (113) extending along the tangential direction of the inner wall of the working cavity. The inlet is connected to the inlet pipe (111), and the outlet is connected to the outlet pipe (112).

8. The water pump module (1) according to claim 7, characterized in that The inlet pipe (111), the outlet pipe (112), and the shell body (113) are all metal or ceramic parts.

9. The water pump module (1 ) according to any one of claims 1 -8, characterized in that The water pump module (1) further includes: a fixed base, which forms an installation space, one side of which is connected to the housing (11) and the other side of which is connected to the drive assembly (14). A portion of the impeller (13) is disposed in the installation space, and the drive end of the drive assembly (14) is disposed in the installation space to be connected to the impeller (13) for transmission.

10. A liquid heating apparatus characterised in that, include: The container (2), the heating module, and the water pump module (1) as described in any one of claims 1-9; the container (2) has a liquid storage chamber (21); the heating module is disposed in the liquid storage chamber (21), and the working chamber is connected to the liquid storage chamber (21) through the water inlet.

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