Liquid heating device

Abstract

This utility model relates to the field of household appliance technology and provides a liquid heating device. The water pump module in this liquid heating device includes: a housing with an inlet and an outlet, a working chamber communicating with the inlet and outlet, and a limiting member within the housing; a water-blocking assembly connected to the housing and covering the opening of the working chamber; an impeller assembly disposed within the working chamber, one end rotatably mounted on the water-blocking assembly, and the other end clearance-fitted with the limiting member; and a drive assembly configured to drive the impeller assembly to rotate around the water-blocking assembly within the working chamber. The liquid heating device proposed in this utility model utilizes the clearance fit between the limiting member and the impeller assembly to limit the axial displacement of the impeller and compensate for offset during movement through the reserved clearance. This ensures that even without using plastic materials, the entire impeller assembly will not move excessively, avoiding excessive noise or accelerated wear, and ensuring the smooth high-speed rotation of the impeller assembly.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to 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. In traditional electric water heater pump modules, the impeller assembly and water-contacting parts are typically made of plastic. While plastic parts offer advantages such as low cost and ease of molding, they exhibit the following drawbacks in actual use: First, improper process control during injection molding can easily leave chemical residues in the plastic, leading to unpleasant odors in the water and affecting user experience and health. Second, prolonged contact with high-temperature water (such as boiling water or high-temperature steam) can cause plastic parts to undergo thermal deformation, aging, and even release harmful substances, shortening the pump's lifespan and posing safety hazards.

[0003] However, if high-temperature resistant materials such as stainless steel or ceramics are directly used to replace plastics, the impeller structure needs to be adjusted to suit their processing characteristics. Traditional impeller structures are difficult to adapt to non-plastic materials, which can easily lead to rotational misalignment or wear. Therefore, structural optimization is urgently needed to balance material durability and operational reliability. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the related art. To this end, this utility model proposes a liquid heating device in which one end of the impeller assembly is provided with rotational support through a water-proof component, and the other end is fitted with a limiting component of the housing with a clearance. This not only limits the axial displacement of the impeller, but also compensates for the offset during the movement by reserving a clearance. This ensures that even without using plastic materials, the entire impeller assembly will not move too much, avoiding excessive noise or accelerated wear, and ensuring the smooth high-speed rotation of the impeller assembly.

[0005] A liquid heating device according to a first aspect of the present invention includes a container, a water pump module, and a heating module; the container forms a liquid storage chamber; the heating module is disposed in the liquid storage chamber.

[0006] The water pump module includes:

[0007] A housing having an inlet and an outlet, a working chamber communicating with the inlet and outlet being formed inside the housing, the working chamber communicating with the liquid storage chamber through the inlet, and a limiting member being formed inside the housing;

[0008] A water-proof assembly is connected to the housing and covers the opening of the working chamber;

[0009] An impeller assembly is disposed within the working chamber, with one end rotatably mounted on the water-proof assembly and the other end in clearance fit with the limiting member, so as to limit the range of movement of the impeller assembly during rotation by the limiting member;

[0010] A drive assembly is configured to drive the impeller assembly to rotate within the working chamber about the baffle assembly to guide fluid flowing in from the inlet to the outlet.

[0011] The liquid heating device proposed in this utility model provides rotational support for one end of the impeller assembly in the water pump module through a water-proof component, and the other end is fitted with a limiting component of the housing with a clearance. This not only limits the axial displacement of the impeller, but also compensates for the offset during the movement by reserving a clearance. This ensures that even without using plastic materials, the entire impeller assembly will not move too much, avoiding excessive noise or accelerated wear, and ensuring the smooth high-speed rotation of the impeller assembly.

[0012] According to one embodiment of the present utility model, the housing includes: a housing body, a water inlet pipe and a water outlet pipe; the housing body has the water inlet and the water outlet, the water inlet is connected to the water inlet pipe, the water outlet is connected to the water outlet pipe, and the water-proof component is connected to the housing body and forms the working cavity with the housing body;

[0013] The limiting member is formed in at least one of the shell body, the water inlet pipe, and the water outlet pipe.

[0014] In this embodiment, by setting limiting components in the housing, inlet pipe, or outlet pipe, the water pump module can effectively limit the movement range of the impeller assembly and ensure its stability during high-speed rotation.

[0015] According to one embodiment of the present invention, the limiting member includes:

[0016] The support shaft has one end connected to the inner wall of the water inlet pipe and the other end extending to the water inlet or through the water inlet into the working chamber to be clearance-fitted with the impeller assembly.

[0017] The support shaft in this embodiment of the invention not only provides axial positioning, but also compensates for the slight displacement of the impeller assembly during high-speed rotation by reserving a gap, thus ensuring the smooth operation of the impeller assembly.

[0018] According to one embodiment of the present invention, the limiting member further includes:

[0019] Ribs are formed on the inner wall surface of the water inlet pipe, and the support shaft is connected to the inner wall of the water inlet pipe through the ribs.

[0020] This embodiment enhances the structural strength of the support shaft by incorporating ribs, preventing displacement or deformation of the support shaft during fluid impact or impeller assembly rotation.

[0021] According to one embodiment of the present invention, the circumferential inner wall surface of the working chamber is a stepped surface, and the radial height of at least a portion of the inner wall region where the water outlet is located is lower than the radial height of other regions.

[0022] This embodiment sets up a stepped surface. When the fluid reaches the vicinity of the outlet, the resistance of the stepped surface changes the flow direction and speed of the fluid, making the fluid more concentrated and smooth when discharged. This reduces backflow and eddies of the fluid near the outlet and optimizes the discharge path of the fluid.

[0023] According to one embodiment of the present invention, the impeller assembly includes: an impeller housing and ball bearings; the water-blocking assembly includes: a water-blocking plate and a positioning shaft formed thereon;

[0024] The impeller housing has blades formed at one end and a shaft groove formed at the other end;

[0025] The positioning shaft extends into the shaft groove so that the drive assembly drives the impeller assembly to rotate about the positioning shaft.

[0026] According to one embodiment of the present invention, the impeller assembly further includes: a first magnetic element; the drive assembly includes: a drive element and a second magnetic element;

[0027] The first magnetic element is disposed in the impeller housing, the second magnetic element is opposite to the first magnetic element, and the drive shaft of the drive element is connected to the second magnetic element so as to drive the second magnetic element through the drive element, thereby causing the first magnetic element to drive the impeller housing to rotate.

[0028] In this embodiment, the impeller assembly can maintain stable and efficient rotation during startup, operation, and shutdown through magnetic drive.

[0029] According to one embodiment of the present invention, the impeller assembly further includes: a first sealing member connected to the other side of the impeller housing, a receiving cavity formed between the impeller housing and the first sealing member, and the first magnetic member disposed in the receiving cavity.

[0030] According to one embodiment of the present invention, the other side of the impeller housing is provided with a plurality of positioning ribs arranged along its circumference, and the baffle plate is arranged on the other side of the impeller housing through the plurality of positioning ribs, so that the shaft groove is aligned with the positioning shaft during the process of the drive assembly driving the impeller assembly to rotate.

[0031] This embodiment ensures that the positioning shaft of the baffle plate is located as centrally as possible by limiting the positioning ribs. This, in turn, guarantees that the shaft groove on the impeller housing and the positioning shaft on the baffle plate can be precisely aligned.

[0032] According to one embodiment of the present invention, the bottom of the rotating shaft groove is formed with an arc-shaped protrusion, and the arc-shaped protrusion abuts against the positioning shaft;

[0033] Alternatively, the rotating shaft groove is provided with balls, and the bottom of the rotating shaft groove abuts against the positioning shaft through the balls.

[0034] This embodiment reduces the resistance of the impeller assembly during rotation by setting an arc-shaped protrusion or setting ball bearings.

[0035] According to one embodiment of the present invention, the impeller assembly further includes: a bushing disposed in the shaft groove and sleeved on the positioning shaft.

[0036] This embodiment reduces swaying caused by centrifugal force or fluid impact by setting a bushing, significantly improving the dynamic balance of the impeller assembly when rotating at high speed.

[0037] The liquid heating device proposed in this utility model utilizes a water pump module to introduce water from the storage chamber into the valve body, and opens or closes the water outlet channel through the valve body, thereby realizing the water pumping function. Furthermore, the water pump module in this liquid heating device, due to the clearance fit of the limiting component, not only restricts the axial displacement of the impeller, but also compensates for offset during movement through the reserved clearance. This ensures that even without using plastic materials, the entire impeller assembly will not move excessively, avoiding excessive noise or accelerated wear, and ensuring the smooth high-speed rotation of the impeller assembly.

[0038] 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

[0039] 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.

[0040] Figure 1 This is a three-dimensional structural diagram of the water pump module provided in this embodiment of the utility model.

[0041] Figure 2 This is an exploded structural diagram of the water pump module provided in this embodiment of the utility model.

[0042] Figure 3 This is a cross-sectional structural diagram of the water pump module provided in this embodiment of the utility model.

[0043] Figure 4 This is one of the schematic diagrams of the housing provided in the embodiment of this utility model.

[0044] Figure 5 This is a second schematic diagram of the housing provided in this embodiment of the utility model.

[0045] Figure 6 This is a cross-sectional structural diagram of the shell provided in an embodiment of the present invention.

[0046] Figure 7 This is an exploded structural diagram of the impeller assembly provided in an embodiment of the present invention.

[0047] Figure 8 This is one of the cross-sectional structural schematic diagrams of the impeller assembly provided in this embodiment of the utility model.

[0048] Figure 9 This is one of the cross-sectional structural schematic diagrams of the water-proof component provided in this embodiment of the utility model.

[0049] Figure 10 This is the second cross-sectional structural schematic diagram of the water-proof component provided in this embodiment of the utility model.

[0050] Figure 11 This is a schematic diagram of the liquid heating device provided in an embodiment of the present invention.

[0051] Figure 12 This is the second cross-sectional structural schematic diagram of the impeller assembly provided in this embodiment of the utility model.

[0052] Figure 13 This is the third cross-sectional structural schematic diagram of the impeller assembly provided in this embodiment of the utility model.

[0053] Figure label:

[0054] 1. Water pump module; 11. Housing; 111. Inlet pipe; 1111. Inlet; 112. Outlet pipe; 1121. Outlet; 113. Housing body; 114. Positioning rib; 115. Support shaft; 116. Rib; 12. Waterproof assembly; 121. Waterproof plate; 1211. Recessed groove; 122. Positioning shaft; 13. Impeller assembly; 131. Impeller housing; 132. Ball bearing; 133. Bushing; 134. First magnetic component; 135. First sealing component; 136. Arc-shaped protrusion; 14. Drive assembly; 141. Drive component; 142. Second magnetic component; 143. Rotating seat; 15. Sealing ring; 16. Fixed seat;

[0055] 2. Container; 21. Liquid storage chamber. Detailed Implementation

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] The following is combined with Figures 1 to 13 This application describes a liquid heating device. The liquid heating device includes a container 2, a water pump module 1, and a heating module; the container 2 forms a liquid storage chamber 21; the heating module is disposed in the liquid storage chamber 21. The water pump module 1 provides power to the liquid heating device to deliver hot water. The water pump module 1 in this application is applied to an electric kettle; however, it should be understood that the liquid heating device of this application can also be applied to an electric kettle, an electric tea maker, an electric water dispenser, or any other suitable device.

[0061] In one embodiment of this application, such as Figures 1 to 6 as well as Figure 11 As shown, the water pump module 1 includes: a housing 11, a water-blocking assembly 12, an impeller assembly 13, and a drive assembly 14. The housing 11 has an inlet 1111 and an outlet 1121. A working chamber communicating with the inlet 1111 and the outlet 1121 is formed inside the housing 11. The working chamber is connected to the liquid storage chamber 21 through the inlet 1111. A limiting member 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 assembly 13 is disposed in the working chamber, with one end rotatably disposed on the water-blocking assembly 12 and the other end clearance-fitted with the limiting member to limit the range of movement of the impeller assembly 13 during rotation. The drive assembly 14 is configured to drive the impeller assembly 13 to rotate around the water-blocking assembly 12 in the working chamber to guide the fluid flowing in from the inlet 1111 to the outlet 1121.

[0062] In this embodiment, the housing 11 is the external structure of the water pump module 1, and it has a working chamber, an inlet 1111, and an outlet 1121 for fluid entry and exit. The impeller assembly 13 is installed in the working chamber and maintains a clearance fit with the limiting member in the housing 11, that is, the impeller assembly 13 and the limiting member are set at a certain distance apart. The distance between the two can be adjusted as needed. For example, if the radial runout of the impeller assembly 13 needs to be stable within 0.03mm, the distance between the two can be set to 0.03mm.

[0063] When the liquid heating device is working, the drive assembly 14 starts and drives the impeller assembly 13 to rotate around the water-blocking assembly 12 within the working chamber. The rotation of the impeller assembly 13 generates centrifugal force, drawing water from the liquid storage chamber 21 into the working chamber through the inlet 1111. The water is pushed by the impeller assembly 13 within the working chamber and discharged through the outlet 1121.

[0064] During rotation, one end of the impeller assembly 13 is provided with stable rotational support via the water-blocking assembly 12, while the other end maintains a clearance fit with the limiting member within the housing 11. This ensures the axial stability of the impeller assembly 13 during high-speed rotation, while allowing a certain amount of radial runout (e.g., within 0.03 mm) to compensate for minor offsets during movement. The clearance between the limiting member and the impeller assembly 13 can be adjusted according to actual needs to adapt to different working conditions and precision requirements.

[0065] The water pump module 1 proposed in this utility model can draw water out of the liquid storage chamber 21, thereby realizing the water pumping function. Because the water pump module 1 in this liquid heating device has a clearance fit with a limiting component, it not only restricts the axial displacement of the impeller but also compensates for the offset during movement through the reserved clearance. This ensures that even without using plastic materials, the entire impeller assembly 13 will not move excessively, avoiding excessive noise or accelerated wear, and ensuring the smooth high-speed rotation of the impeller assembly 13.

[0066] It should be noted that in this embodiment, the water-contacting components (such as the housing 11, the water-blocking assembly 12, and the impeller assembly 13) can be made of hard materials such as metal, ceramic, or glass. These materials have good corrosion resistance, high temperature resistance, and mechanical strength, but are relatively heavy. To avoid noise and wear problems caused by their heavy weight, this embodiment uses a limiting component. The limiting component, through a clearance fit with the impeller assembly 13, limits its displacement range during movement, preventing excessive vibration or displacement due to its heavy weight. It also prevents the impeller assembly 13 from contacting other hard materials, thus preventing wear and noise.

[0067] In some embodiments, such as Figures 1 to 6 As shown, the housing 11 includes: a housing body 113, an inlet pipe 111, and an outlet pipe 112. The housing body 113 has an inlet 1111 and an outlet 1121. The inlet 1111 is connected to the inlet pipe 111, and the outlet 1121 is connected to the outlet pipe 112. A water-blocking assembly 12 is connected to the housing body 113 and forms a working cavity with the housing body 113. A limiting member is formed in at least one of the housing body 113, the inlet pipe 111, and the outlet pipe 112. That is, a limiting member can be provided in the housing body 113, the inlet pipe 111, and the outlet pipe 112 as needed to fit with the impeller assembly 13 with a clearance and limit the range of movement of the impeller assembly 13 during rotation.

[0068] For example, the limiting member can be directly disposed within the working cavity of the housing body 113, near the side of the impeller assembly 13. In this case, the limiting member can be a protrusion or a groove, maintaining a certain gap with the end face of the impeller assembly 13. This gap can be adjusted according to actual needs to ensure that the radial runout of the impeller assembly 13 is stable within a certain range.

[0069] Furthermore, a limiting element can also be installed inside the inlet pipe 111 or the outlet pipe 112. For example, if a limiting element is installed inside the inlet pipe 111, and the impeller assembly 13 is relatively small, the limiting element can extend into the working chamber to achieve a clearance fit with the impeller assembly 13 within the working chamber. However, if the impeller assembly 13 is relatively large, and its structure extends to the inlet 1111 during rotation, the limiting element can extend only to the inlet 1111. This method provides initial limiting and support for the impeller assembly 13, reducing vibration and noise during rotation. Similarly, a similar limiting element can be installed inside the outlet pipe 112 to further enhance the stability of the impeller assembly 13.

[0070] During operation, after the drive assembly 14 is started, the impeller assembly 13 rotates at high speed in the working chamber. By providing limiting members on at least one of the housing body 113, the inlet pipe 111, and the outlet pipe 112, the clearance fit between one or more limiting members and the impeller assembly 13 ensures that the impeller assembly 13 will not move axially during rotation, while allowing a certain amount of radial runout to accommodate small offsets during the movement.

[0071] In this embodiment, by setting limiting components in the housing body 113, the inlet pipe 111, or the outlet pipe 112, the water pump module 1 can effectively limit the movement range of the impeller assembly 13 and ensure its stability when rotating at high speed.

[0072] In one example, such as Figure 4 As shown, the limiting component includes a support shaft 115. One end of the support shaft 115 is connected to the inner wall of the water inlet pipe 111, and the other end extends to the water inlet 1111 or through the water inlet 1111 into the working chamber to cooperate with the impeller assembly 13 with clearance.

[0073] In this embodiment, the support shaft 115 maintains a certain clearance fit with the impeller assembly 13 to limit the range of movement of the impeller assembly 13 during rotation. The end face of the support shaft 115 can be an arc surface or a plane, depending on the shape of the part that needs to contact the impeller assembly 13. The support shaft 115 not only provides axial limiting, but also compensates for the slight displacement of the impeller assembly 13 during high-speed rotation by reserving a clearance, ensuring the smooth operation of the impeller assembly 13.

[0074] Furthermore, in another example, such as Figure 5As shown, the limiting component also includes a support shaft 115 and a rib 116. One end of the support shaft 115 is connected to the inner wall of the water inlet pipe 111, and the other end extends to the water inlet 1111 or through the water inlet 1111 into the working chamber to have a clearance fit with the impeller assembly 13. The rib 116 is formed on the inner wall surface of the water inlet pipe 111, and the support shaft 115 is connected to the inner wall of the water inlet pipe 111 through the rib 116.

[0075] In this embodiment, the support shaft 115 is connected to the inner wall of the inlet pipe 111 by ribs 116. Multiple ribs 116 can be evenly distributed on the inner wall of the inlet pipe 111 to enhance the stability of the support shaft 115. By providing ribs 116 in conjunction with the support shaft 115, the structural strength of the support shaft 115 is enhanced, preventing displacement or deformation of the support shaft 115 during fluid impact or impeller assembly 13 rotation. Simultaneously, the ribs 116 also play a certain guiding role, optimizing the fluid flow path and reducing fluid resistance.

[0076] In some embodiments, such as Figure 4 and Figure 6 As shown, the circumferential inner wall of the working chamber is a stepped surface. The radial height of the inner wall region where at least part of the outlet 1121 is located is lower than the radial height of other regions, so that the rotating water flow is subject to certain resistance near the outlet 1121, which makes it easier to discharge.

[0077] When the impeller assembly 13 rotates, the fluid flows outward along the inner wall of the working chamber under the action of centrifugal force. When the fluid reaches the vicinity of the outlet 1121, the resistance of the step surface changes the flow direction and speed of the fluid, making the fluid more concentrated and smooth when discharged, reducing backflow and eddies of the fluid near the outlet 1121, and optimizing the discharge path of the fluid.

[0078] The height and angle of the stepped surface can be adjusted according to actual needs to adapt to different fluid characteristics and operating conditions. If the fluid viscosity is high or greater discharge resistance is required, the radial height difference can be appropriately increased. Conversely, if the fluid viscosity is low and resistance needs to be minimized, the radial height difference can be decreased.

[0079] In some embodiments, such as Figure 2 and Figure 12 As shown, the impeller assembly 13 includes: an impeller housing 131; the water-blocking assembly 12 includes: a water-blocking plate 121 and a positioning shaft 122 formed thereon; one end of the impeller housing 131 has blades formed, and the other end has a shaft groove; the positioning shaft 122 extends to the shaft groove so that the drive assembly 14 drives the impeller assembly 13 to rotate around the positioning shaft 122.

[0080] To reduce the resistance when the impeller assembly 13 rotates, an arc-shaped protrusion 136 can be formed at the bottom of the shaft groove, and the arc-shaped protrusion 136 abuts against the positioning shaft 122. When the drive assembly 14 drives the impeller assembly 13 to rotate, the positioning shaft 122 can support the entire impeller housing 131 through the arc-shaped protrusion, ensuring the stability of the impeller assembly 13 when rotating at high speed.

[0081] The shape of the arc-shaped protrusion 136 can be adjusted according to the shape of the position in direct contact with the positioning shaft 122. Specifically, the radius of curvature of the arc-shaped protrusion 136 matches the axial cross-sectional profile of the contact end of the positioning shaft 122, forming a line contact area with a gradual transition. This adaptive contact structure enables the impeller assembly 13 to operate stably within its high-speed rotation range.

[0082] Furthermore, such as Figure 2 , Figure 7 and Figure 8 As shown, in addition to the arc-shaped protrusion 136, a ball bearing 132 can be added between the positioning shaft 122 and the rotating shaft groove. The bottom of the rotating shaft groove abuts against the positioning shaft 122 through the ball bearing 132, so that during the process of the drive assembly 14 driving the impeller assembly 13 to rotate, the impeller housing 131 is supported on the ball bearing 132, and the positioning shaft 122 is supported under the ball bearing 132. The impeller housing 131 and the support shaft can rotate relative to the ball bearing 132. The introduction of the ball bearing 132 upgrades the support system of the impeller assembly 13 from a sliding friction pair to rolling friction, which significantly reduces the resistance during rotation.

[0083] like Figure 3 and Figure 13 As shown, the impeller assembly 13 also includes a bushing 133, which is disposed within the shaft groove and fitted over the positioning shaft 122. The bushing 133 restricts the radial displacement of the positioning shaft 122 within the shaft groove, reducing oscillation caused by centrifugal force or fluid impact. Simultaneously, the bottom surface of the impeller housing 131 contacts the ball bearings 132, and the top surface of the impeller housing 131 has a clearance fit with the support shaft 115. This allows the impeller housing 131 to be positioned while still rotating at high speed, significantly improving the dynamic balance of the impeller assembly 13 during high-speed rotation.

[0084] Generally, bushing 133 can be made of heat-resistant materials, such as stainless steel, ceramic, brass, graphite, and polyetheretherketone (PEEK).

[0085] It should be noted that for the impeller assembly 13 to rotate stably, the dimensions, surface finish, and fit between the ball bearings 132, bushing 133, and positioning shaft 122 of the baffle plate 121 are crucial. Considering actual production, it is best to machine the ball bearings 132 and bushing 133 separately before assembling them with the impeller housing 131. Of course, one or both of the ball bearings 132 and bushing 133 can be integrally formed with the impeller housing 131, but the effect will be relatively inferior.

[0086] In some embodiments, such as Figure 2 , Figure 3 and Figure 7 As shown, the impeller assembly 13 further includes a first magnetic element 134; the drive assembly 14 includes a drive element 141 and a second magnetic element 142; the first magnetic element 134 is disposed in the impeller housing 131, the second magnetic element 142 is opposite to the first magnetic element 134, and the drive shaft of the drive element 141 is connected to the second magnetic element 142 so as to drive the second magnetic element 142 through the drive element 141, so that the first magnetic element 134 drives the impeller housing 131 to rotate.

[0087] In this embodiment, both the first magnetic component 134 and the second magnetic component 142 are components made of magnets or magnetic materials. The first magnetic component 134 and the second magnetic component 142 have the same magnetism at opposite positions.

[0088] The drive component 141 can be a motor or other rotating drive component. When the rotation of the drive component 141 is transmitted to the second magnetic component 142 through the drive shaft, a magnetic interaction is generated between the second magnetic component 142 and the first magnetic component 134. Under the action of the magnetic force, the first magnetic component 134 drives the impeller housing 131 to start rotating. As a result, the impeller housing 131 rotates at high speed in the working chamber. The rotation of the impeller housing 131 generates centrifugal force, which draws fluid into the working chamber from the inlet 1111. The fluid is accelerated under the action of the impeller housing 131 and discharged through the outlet 1121. When the water pump module 1 completes its task or reaches the preset condition, the power is cut off, and the drive component 141 stops rotating. After the second magnetic component 142 stops rotating, it can provide a certain resistance to the first magnetic component 134, which can eventually stop the entire impeller housing 131 from rotating.

[0089] In this embodiment, the impeller assembly 13 can maintain stable and efficient rotation during startup, operation and shutdown through magnetic drive.

[0090] In addition, the drive assembly 14 is also provided with a rotating seat 143 and a fixed sleeve. The fixed sleeve is fitted on the rotating shaft, and the rotating seat 143 is fitted on the fixed sleeve. The rotating seat 143 is used to support and fix the second magnetic component 142.

[0091] In this embodiment, after the driving component 141 is energized, it drives the driving shaft to rotate, and the fixed sleeve rotates accordingly. The rotation of the fixed sleeve drives the rotating seat 143 to rotate, and the second magnetic component 142 on the rotating seat 143 rotates accordingly. Thus, the second magnetic component 142 drives the first magnetic component 134 to rotate through magnetic force, so that the first magnetic component 134 and the impeller housing 131 start to rotate synchronously.

[0092] In a magnetic drive system, the concentricity of the first magnetic component 134 and the second magnetic component 142 is one of the key factors affecting transmission efficiency and stability. Poor concentricity between the two may lead to uneven magnetic force transmission, resulting in vibration, noise, and energy loss.

[0093] To solve the above problems, such as Figure 5 As shown, the other side of the impeller housing 131 is provided with a plurality of positioning ribs 114 arranged along its circumference. The positioning ribs 114 are protruding structures, and the baffle plate 121 is arranged on the other side of the impeller housing 131 through the plurality of positioning ribs 114.

[0094] During the rotation of the impeller assembly 13 driven by the drive assembly 14, the positioning rib 114 limits the outer periphery of the baffle plate 121. This limiting effect ensures that the baffle plate 121 does not deviate from its predetermined position during rotation, thereby maintaining the stability of the positioning shaft 122 on the baffle plate 121. The limiting effect of the positioning rib 114 ensures that the positioning shaft 122 of the baffle plate 121 is located as centrally as possible. This, in turn, ensures that the shaft groove on the impeller housing 131 and the positioning shaft 122 on the baffle plate 121 can be precisely aligned. This alignment is crucial for the stability and efficiency of the magnetic drive, as it ensures the concentricity between the first magnetic element 134 and the second magnetic element 142.

[0095] In some embodiments, such as Figure 7 As shown, the impeller assembly 13 further includes a first seal 135. The first seal 135 is connected to the other side of the impeller housing 131, and a receiving cavity is formed between the impeller housing 131 and the first seal 135. A first magnetic element 134 is disposed in the receiving cavity.

[0096] To prevent the first magnetic component 134 from contacting the fluid, the impeller assembly 13 is also provided with a first seal 135. The first seal 135 is connected to the other side of the impeller housing 131 to form a receiving cavity, preventing fluid from entering and affecting the magnetic transmission. The first seal 135 can be made of corrosion-resistant and high-temperature-resistant materials to adapt to different fluid environments.

[0097] like Figure 2As shown, the water pump module 1 also includes a mounting base 16. The mounting base 16 forms an installation space, and its side is connected to components within the liquid heating device for fixing the entire water pump module. The upper side of the mounting base 16 is connected to the housing 11, and the lower side is connected to the drive assembly 14. The first magnetic element 134 (and the entire impeller assembly 13) is opposite to the installation space, and the second magnetic element 142 is disposed within the installation space, opposite to the first magnetic element 134. The drive shaft of the drive element 141 is connected to the second magnetic element 142, and by rotating the second magnetic element 142, the first magnetic element 134 and the impeller assembly 13 are driven to rotate.

[0098] To avoid sealing within the working chamber, in some embodiments, such as Figure 2 As shown, a sealing ring 15 is also provided between the impeller housing 131 and the baffle plate 121. The sealing ring 15 is usually made of corrosion-resistant and wear-resistant materials, such as fluororubber, silicone rubber or polytetrafluoroethylene.

[0099] Correspondingly, such as Figure 9 and Figure 10 As shown, the baffle plate 121 has a recessed groove 1211 for accommodating the sealing ring 15 and the bottom edge of the impeller housing 131. The sealing ring 15 is arranged circumferentially along the impeller housing 131, and the entire bottom edge of the impeller housing 131 is fitted into the recessed groove 1211 in conjunction with the sealing ring 15. During the rotation of the impeller housing 131, the sealing ring 15 is tightly fitted between the bottom edge of the impeller housing 131 and the recessed groove 1211 of the baffle plate 121, preventing fluid leakage from the working chamber. The elastic design of the sealing ring 15 allows for slight displacement of the impeller housing 131 during rotation while maintaining sealing performance. By setting the sealing ring 15 between the impeller housing 131 and the baffle plate 121, and combining it with the recessed groove 1211 design, the pump module 1 can ensure the sealing of the working chamber while allowing slight displacement of the impeller housing 131 during rotation.

[0100] Optionally, such as Figure 9 As shown, the baffle plate 121 and the positioning shaft 122 are integrally formed; the material can be metal, glass or ceramic. The integral design greatly simplifies the installation process, reduces the assembly steps between parts and potential leakage points, and improves the reliability and durability of the overall structure.

[0101] like Figure 10 As shown, the baffle plate 121 and the positioning shaft 122 can also be composed of two connected parts. For example, the baffle plate 121 body can be formed by stretching stainless steel and then riveting or welding it to the positioning shaft 122. The split design allows for more precise machining and processing of the baffle plate 121 and the positioning shaft 122. In particular, the positioning shaft 122 can more easily meet design requirements in terms of size and surface finish.

[0102] 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 liquid heating device, characterized in that, It includes a container (2), a water pump module (1), and a heating module; the container (2) forms a liquid storage chamber (21); the heating module is located in the liquid storage chamber (21); The water pump module (1) includes: The housing (11) has an inlet (1111) and an outlet (1121). A working chamber is formed inside the housing (11) that communicates with the inlet (1111) and the outlet (1121). The working chamber is connected to the liquid storage chamber (21) through the inlet (1111). A limiting member 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 assembly (13) is disposed in the working chamber. One end is rotatably disposed on the water-proof assembly (12), and the other end is clearance-fitted with the limiting member so as to limit the movement range of the impeller assembly (13) during rotation by the limiting member. The drive assembly (14) is configured to drive the impeller assembly (13) to rotate within the working chamber about the water-blocking assembly (12) to guide the fluid flowing in from the inlet (1111) to the outlet (1121).

2. The liquid heating device according to claim 1, characterized in that, The housing (11) includes: a housing body (113), a water inlet pipe (111), and a water outlet pipe (112); the housing body (113) has the water inlet (1111) and the water outlet (1121), the water inlet (1111) is connected to the water inlet pipe (111), the water outlet (1121) is connected to the water outlet pipe (112), and the water-proof component (12) is connected to the housing body (113) and forms the working cavity with the housing body (113); The limiting member is formed in at least one of the shell body (113), the water inlet pipe (111), and the water outlet pipe (112).

3. The liquid heating device according to claim 2, characterized in that, The limiting component includes: The support shaft (115) is connected at one end to the inner wall of the water inlet pipe (111) and at the other end extends to the water inlet (1111) or through the water inlet (1111) into the working chamber to be clearance-fitted with the impeller assembly (13).

4. The liquid heating device according to claim 3, characterized in that, The limiting component also includes: Ribs (116) are formed on the inner wall of the water inlet pipe (111), and the support shaft (115) is connected to the inner wall of the water inlet pipe (111) through the ribs (116).

5. The liquid heating device according to claim 1, characterized in that, The circumferential inner wall of the working chamber is a stepped surface, and the radial height of the inner wall region where at least part of the water outlet (1121) is located is lower than the radial height of other regions.

6. The liquid heating device according to claim 1, characterized in that, The impeller assembly (13) includes: an impeller housing (131); the water-blocking assembly (12) includes: a water-blocking plate (121) and a positioning shaft (122) formed thereon. The impeller housing (131) has blades formed at one end and a shaft groove formed at the other end; The positioning shaft (122) extends into the shaft groove so that the drive assembly (14) drives the impeller assembly (13) to rotate about the positioning shaft (122).

7. The liquid heating device according to claim 6, characterized in that, The impeller assembly (13) further includes a first magnetic element (134); the drive assembly (14) includes a drive element (141) and a second magnetic element (142). The first magnetic element (134) is disposed in the impeller housing (131), the second magnetic element (142) is opposite to the first magnetic element (134), and the drive shaft of the drive element (141) is connected to the second magnetic element (142) so as to drive the second magnetic element (142) through the drive element (141) so that the first magnetic element (134) drives the impeller housing (131) to rotate.

8. The liquid heating device according to claim 7, characterized in that, The impeller assembly (13) further includes: a first seal (135) connected to the other side of the impeller housing (131), a receiving cavity is formed between the impeller housing (131) and the first seal (135), and the first magnetic element (134) is disposed in the receiving cavity.

9. The liquid heating device according to claim 6, characterized in that, The impeller housing (131) is provided with a plurality of positioning ribs (114) arranged along its circumference on the other side. The baffle plate (121) is arranged on the other side of the impeller housing (131) through the plurality of positioning ribs (114) so ​​that the shaft groove is aligned with the positioning shaft (122) during the process of the drive assembly (14) driving the impeller assembly (13) to rotate.

10. The liquid heating device according to claim 6, characterized in that, The bottom of the rotating shaft groove is formed with an arc-shaped protrusion (136), which abuts against the positioning shaft (122). Alternatively, the rotating shaft groove is provided with a ball (132), and the bottom of the rotating shaft groove abuts against the positioning shaft (122) through the ball (132).

11. The liquid heating device according to claim 10, characterized in that, The impeller assembly (13) further includes a bushing (133), which is disposed in the shaft groove and sleeved on the outside of the positioning shaft (122).

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