Water pumps and water heaters with them

Abstract

This invention discloses a water pump and a water heater having the same. The water pump includes: a shielding sleeve with a rotor slot and a stator slot on its end face; a stator fitted within the stator slot; a rotating shaft disposed within the rotor slot and fixedly connected to the shielding sleeve; a rotor rotatably fitted within the rotor slot and sleeved outside the rotating shaft; and a pump cover mounted on the upper end face of the shielding sleeve. The water pump according to embodiments of this invention has advantages such as low noise and high integration.

Description

Technical Field

[0001] This invention relates to the field of electrical manufacturing technology, and more specifically, to a water pump and a water heater having said water pump. Background Technology

[0002] To prevent cold water from being discharged from a gas water heater with zero cold water function, a centrifugal water pump needs to be added to the inlet pipe to keep the water flowing at a certain flow rate.

[0003] Centrifugal water pumps in related technologies generate significant vibrations during operation, resulting in louder operating noise from the water heater and affecting user comfort. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a water pump with advantages such as low noise and high integration.

[0005] Therefore, the present invention also proposes a water heater having the aforementioned water pump.

[0006] To achieve the above objectives, an embodiment of the first aspect of the present invention provides a water pump, the water pump comprising: a shielding sleeve having a rotor slot and a stator slot on its end face; a stator fitted within the stator slot; a rotating shaft disposed within the rotor slot and fixedly connected to the shielding sleeve; a rotor rotatably fitted within the rotor slot and sleeved outside the rotating shaft; and a pump cover mounted on the upper end face of the shielding sleeve, the pump cover having an integrally formed pump cover inlet and a pump cover outlet.

[0007] The water pump according to embodiments of the present invention has advantages such as low noise and high integration.

[0008] In addition, the water pump according to the above embodiments of the present invention may also have the following additional technical features:

[0009] According to one embodiment of the present invention, the rotating shaft and the shielding sleeve are integrally formed or injection molded.

[0010] According to one embodiment of the present invention, the water pump further includes a heat dissipation base shell, which is mounted on the lower end face of the shielding sleeve.

[0011] According to one embodiment of the present invention, the water pump further includes a circuit board, a heat dissipation cavity is formed in the heat dissipation base shell, the circuit board is disposed in at least one of the stator slot and the heat dissipation cavity and is electrically connected to the stator, and the stator is spaced apart from the circuit board to form a heat dissipation gap between the stator and the circuit board.

[0012] According to one embodiment of the present invention, the heat dissipation cavity is connected to the stator slot.

[0013] According to one embodiment of the present invention, the water pump further includes a bracket installed below the shielding sleeve, the bracket being adapted to be installed on a water heater.

[0014] According to one embodiment of the present invention, the bracket includes a central portion, a plurality of first lugs and a plurality of second lugs, the plurality of first lugs being circumferentially spaced along the central portion, the plurality of second lugs being circumferentially spaced along the central portion, a bracket through hole being formed on the first lugs, the second lugs including a shock-absorbing section and a mounting section, the shock-absorbing section extending downward and outward from the central portion, the mounting section being connected to the shock-absorbing section, the mounting section being provided with an assembly through hole, and the bracket being adapted to be mounted on a water heater by a third bolt passing through the assembly through hole.

[0015] According to one embodiment of the present invention, the projection of the bracket on the horizontal plane is located within the circumcircle of the projection of the shielding sleeve on the horizontal plane.

[0016] According to one embodiment of the present invention, the water pump further includes a heat dissipation base shell and a bracket. The heat dissipation base shell is installed on the lower end face of the shielding sleeve, and the bracket is installed below the heat dissipation base shell. The bracket is adapted to be installed on a water heater. The heat dissipation base shell is provided with a mounting hole, and the shielding sleeve is provided with a shielding sleeve through hole. The shielding sleeve and the heat dissipation base shell are connected by a first bolt that passes through the shielding sleeve through hole and engages in the mounting hole. The bracket is provided with a bracket through hole, and the bracket and the heat dissipation base shell are connected by a second bolt that passes through the bracket through hole and engages in the mounting hole.

[0017] According to one embodiment of the present invention, a shock-absorbing protective sleeve is provided above the bracket.

[0018] According to one embodiment of the present invention, the pump cover includes: a cover body having a pump cover inlet; and an outlet connector having the pump cover outlet formed on the outlet connector, the outlet connector being connected to the cover body, the outlet connector having a connecting end connected to the cover body and a free end away from the cover body, the connection between the end face of the free end and the circumferential surface being chamfered to form a chamfered surface at the connection between the end face of the free end and the circumferential surface, the minimum angle between the chamfered surface and the axial direction of the free end being less than the minimum angle between the chamfered surface and the radial direction of the free end.

[0019] According to one embodiment of the present invention, the minimum angle between the beveled surface and the axial direction of the free end is 10-25 degrees.

[0020] According to one embodiment of the present invention, the water outlet connector has a water passage, which includes at least a gradually expanding section. The inner diameter of the gradually expanding section gradually increases from the connecting end to the free end, and the minimum angle between the inner circumferential surface of the gradually expanding section and the axial direction of the gradually expanding section is 2.5-10 degrees.

[0021] According to one embodiment of the present invention, the cover includes: a top wall, on which the pump cover inlet is formed; and a peripheral wall, which is disposed around the top wall and extends downward, the top wall extending upward and inward from the peripheral wall, the minimum angle between the top wall and the horizontal plane being 2-10 degrees.

[0022] According to one embodiment of the present invention, the cover body is provided with circumferential reinforcing ribs extending circumferentially along the cover body, and the cover body is provided with a plurality of radial reinforcing ribs extending radially along the cover body. The plurality of radial reinforcing ribs are spaced apart circumferentially along the cover body. The water outlet connector is provided with annular reinforcing ribs extending circumferentially along the water outlet connector. The annular reinforcing ribs are connected to at least one of the plurality of radial reinforcing ribs.

[0023] According to one embodiment of the present invention, the water pump further includes an impeller, the impeller comprising: a first plate having an impeller inlet; a second plate connected to the rotor, the second plate being spaced apart from the first plate to form a water passage gap; and blades disposed within the water passage gap and spaced apart circumferentially along the first plate, wherein the ratio of the distance between the first plate and the second plate to the diameter of the first plate is 0.02-0.15.

[0024] According to one embodiment of the present invention, the distance between the first plate and the second plate is 1-5 mm, and the diameter of the first plate is 30-50 mm.

[0025] According to one embodiment of the present invention, the diameter of the impeller inlet is 8-22 mm, and the radius of the imaginary circle tangent to the inner ends of the plurality of blades is 8-12 mm.

[0026] According to one embodiment of the present invention, the blade is arc-shaped and has a first arc surface and a second arc surface opposite to each other, the first arc surface being located on the side of the arc protrusion of the blade, and the second arc surface being located on the side of the arc concavity of the blade.

[0027] According to one embodiment of the present invention, the radius of the first arc surface is 10-36 mm, and the radius of the second arc surface is 5-25 mm.

[0028] According to one embodiment of the present invention, the first arc surface is connected to the inner end face and the outer end face of the blade, the inner end of the second arc surface is connected to the inner end face of the blade, and the outer end of the second arc surface is connected to the outer end face of the blade through an inclined surface. The inclined surface extends outward from the second arc surface to the first arc surface, and the minimum angle between the inclined surface and the radial direction of the impeller is 0-25 degrees.

[0029] According to one embodiment of the present invention, the angle between the imaginary line connecting the center of the first arc surface of each blade and the center of the first plate, and the imaginary line connecting the inner end of the first arc surface of the blade and the center of the first plate, is 40-95 degrees; the angle between the imaginary line connecting the center of the second arc surface of each blade and the center of the first plate, and the imaginary line connecting the inner end of the first arc surface of the blade and the center of the first plate, is 45-75 degrees.

[0030] According to a second aspect of the present invention, a water heater is provided, the water heater comprising the water pump described in the first aspect of the present invention.

[0031] The water heater according to an embodiment of the present invention, by utilizing the water pump described in the first aspect of the present invention, has advantages such as low noise and high integration.

[0032] Additional aspects and advantages of the 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

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 This is a cross-sectional view of a water pump according to an embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram of the structure of a water pump according to an embodiment of the present invention.

[0036] Figure 3 This is an exploded view of a water pump according to an embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of the structure of a water pump according to an embodiment of the present invention.

[0038] Figure 5 This is a schematic diagram of the pump cover of a water pump according to an embodiment of the present invention.

[0039] Figure 6 This is a cross-sectional view of the pump cover of a water pump according to an embodiment of the present invention.

[0040] Figure 7 This is a partial cross-sectional view of the pump cover of a water pump according to an embodiment of the present invention.

[0041] Figure 8 This is a schematic diagram of the rotor and impeller of a water pump according to an embodiment of the present invention.

[0042] Figure 9 This is a partial cross-sectional view of the impeller of a water pump according to an embodiment of the present invention.

[0043] Reference numerals: Pump 1, Shielding sleeve 100, Rotor slot 101, Shaft 110, Shielding sleeve through hole 120, Guide edge 130, Stator 200, Support leg 210, Rotor 300, Rotor body 310, Rotor magnet 320, Heat dissipation base shell 400, Heat dissipation cavity 401, Positioning groove 402, Wire hole 403, Mounting hole 410, Circuit board 420, Power cord 421, Bracket 500, Center part 510, First lug 520, Bracket through hole 521, Second lug 530, Assembly through hole 531, Vibration damping section 532, Mounting section 533, Pump cover 600, Top wall 601, Peripheral wall 602 Pump cover through hole 610, pump cover inlet 620, outlet connector 630, water passage 631, gradually expanding section 6311, straight section 6312, annular reinforcing rib 632, oblique surface 633, cover body 640, circumferential reinforcing rib 641, radial reinforcing rib 642, impeller 700, impeller inlet 701, water passage gap 702, first plate 710, second plate 720, blade 730, first arc surface 731, second arc surface 732, inclined surface 733, shock-absorbing protective sleeve 800, protective sleeve through hole 810, first bolt 910, second bolt 920, sealing ring 930, gasket 940. Detailed Implementation

[0044] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] The water pump 1 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0048] like Figures 1-9 As shown, the water pump 1 according to an embodiment of the present invention includes a shielding sleeve 100, a stator 200, a rotating shaft 110, and a rotor 300.

[0049] The shielding sleeve 100 has a rotor slot 101 and a stator slot on its end face, with the stator slot located radially outside the rotor slot 101. The stator 200 fits into the stator slot. The rotating shaft 110 is disposed within the rotor slot 101 and is integrally formed with the shielding sleeve 100. The rotor 300 is rotatably fitted within the rotor slot 101 and sleeved outside the rotating shaft 110.

[0050] According to an embodiment of the present invention, the water pump 1 is fixedly connected to the rotating shaft 110 and the shielding sleeve 100, and the rotating shaft 110 and the shielding sleeve 100 are fixed in place. In this way, the rotor 300 is sleeved on the rotating shaft 110, and the rotor 300 rotates relative to the rotating shaft and the shielding sleeve. Compared with the related technology where the rotating shaft is connected to the pump cover, the process of assembling the rotating shaft 110 on the pump cover can be eliminated. This not only improves the assembly efficiency of the rotating shaft 110 and the production efficiency of the water pump 1, but also reduces the number of parts during the assembly of the water pump 1 and improves the integration of the water pump 1. Furthermore, it avoids the assembly process from affecting the positional accuracy of the rotating shaft 110, improves the stability of the rotating shaft 110, reduces the noise generated by the water pump 1 during operation, and improves the comfort of users when using the water pump.

[0051] Furthermore, by providing rotor slots 101 and stator slots on the shielding sleeve 100, the stator 200 and rotor 300 can be centrally installed inside the shielding sleeve 100. While providing insulation and shielding, the shielding sleeve 100 can also position, support, and protect the stator 200 and rotor 300, thereby eliminating the need for other structures used for positioning and protecting the stator 200 and rotor 300, further simplifying the structure of the water pump 1 and improving the integration of the water pump 1.

[0052] Therefore, the water pump 1 according to the embodiment of the present invention has the advantages of low noise and high integration.

[0053] The water pump 1 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0054] In some specific embodiments of the present invention, such as Figures 1-9 As shown, the water pump 1 according to an embodiment of the present invention includes a shielding sleeve 100, a stator 200, a rotating shaft 110, and a rotor 300.

[0055] Optionally, the rotating shaft 110 and the shielding sleeve 100 can be integrally formed or injection molded. This facilitates the formation of an integral structure between the rotating shaft 110 and the shielding sleeve 100, thereby improving the stability and integration of the water pump 1.

[0056] Specifically, the rotating shaft 110 is a ceramic shaft. This gives the rotating shaft 110 good wear resistance and avoids interfering with the rotation of the rotor 300.

[0057] More specifically, such as Figure 1 and Figure 3 As shown, the rotor slot 101 is formed on the upper end face of the shielding sleeve 100 (the vertical direction is shown by the arrow in the figure and is only for ease of description, not a limitation on the actual installation direction of the water pump 1), and the stator slot is formed on the lower end face of the shielding sleeve 100. This facilitates the installation of the stator 200 and the rotor 300, and also facilitates the connection of the rotor 300 and the stator 200 with other structures.

[0058] Figures 1-4 A water pump 1 according to a specific example of the present invention is shown. Figures 1-4 As shown, the water pump 1 also includes a heat dissipation base shell 400 and a bracket 500. The heat dissipation base shell 400 is installed on the lower end face of the shielding sleeve 100, and the bracket 500 is installed below the heat dissipation base shell 400. The bracket 500 is suitable for installation on a water heater. In this way, the water pump 1 can be installed on the water heater using the bracket 500, and the heat dissipation base shell 400 can be used to dissipate heat from the water pump 1, ensuring the normal operation of the water pump 1.

[0059] Specifically, the water pump 1 also includes a circuit board 420. The circuit board 420 is electrically connected to the stator 200. A heat dissipation cavity 401 is formed within the heat dissipation housing 400. The circuit board 420 is disposed in at least one of the heat dissipation cavity 401 and the stator slot, and the stator 200 is spaced apart from the circuit board 420 to form a heat dissipation gap between the stator 200 and the circuit board 420. In this way, the heat dissipation housing 400 can be used to dissipate heat from the circuit board 420, avoiding the heat generated by the stator 200 during operation and the heat generated by other components on the circuit board 420 from affecting the normal operation of the circuit board 420, thereby ensuring that the circuit board 420 operates stably within a suitable temperature range.

[0060] Specifically, the lower end face of the stator 200 is provided with multiple support legs 210, which are spaced apart circumferentially along the stator 200 and are engaged with the circuit board 420. This facilitates the installation of the circuit board 420 and allows for easy control of the distance between the circuit board 420 and the stator 200, enabling the circuit board 420 to be close to the heat dissipation base 400 for heat dissipation.

[0061] The lower end face of the shielding sleeve 100 is provided with a guide edge 130, which is adapted to extend into the heat dissipation cavity 401. This allows the guide edge to be used for guidance, making it easy to install the shielding sleeve 100 and the heat dissipation base shell 400 together.

[0062] The lower part of the peripheral wall of the heat dissipation base 400 is provided with a positioning groove 402, and a part of the circuit board 420 fits into the positioning groove 402. This facilitates the installation and positioning of the circuit board 420.

[0063] The heat dissipation base 400 has a wire passage hole 403 on its peripheral wall, which is connected to the upper end face of the heat dissipation base 400. The power cable 421 is electrically connected to the circuit board 420 through the wire passage hole 403. This facilitates the connection between the power cable 421 and the circuit board 420.

[0064] Furthermore, such as Figure 1 As shown, the heat dissipation cavity 401 is connected to the stator slot. This facilitates the electrical connection between the circuit board 420 and the stator 200, and also allows for heat dissipation from the stator 200. Figure 1 As shown, the circuit board 420 is adjacent to the bottom wall of the heat sink 400. This improves the heat dissipation effect of the circuit board 420. The heat sink 400 can be an aluminum base shell. This ensures the structural strength and heat dissipation effect of the heat sink 400.

[0065] Specifically, such as Figures 1-4 As shown, the heat dissipation base shell 400 has a mounting hole 410, and the shielding sleeve 100 has a shielding sleeve through hole 120. The shielding sleeve 100 and the heat dissipation base shell 400 are connected by a first bolt 910 that passes through the shielding sleeve through hole 120 and engages with the mounting hole 410. The bracket 500 has a bracket through hole 521, and the bracket 500 and the heat dissipation base shell 400 are connected by a second bolt 920 that passes through the bracket through hole 521 and engages with the mounting hole 410. This facilitates the assembly of the various structures of the water pump 1. Moreover, since the first bolt 910 and the second bolt 920 share the mounting hole 410, the number of threaded holes can be reduced, the number of processing steps for the water pump 1 can be reduced, the production efficiency of the water pump 1 can be improved, and the processing cost can be reduced.

[0066] More specifically, such as Figures 1-4 As shown, the bracket 500 includes a central portion 510, a plurality of first lugs 520, and a plurality of second lugs 530. The plurality of first lugs 520 are spaced apart circumferentially along the central portion 510, and the plurality of second lugs 530 are spaced apart circumferentially along the central portion 510. A bracket through-hole 521 is formed on the first lugs 520. The second lugs 530 include a damping section 532 and a mounting section 533. The damping section 532 extends downward and outward from the central portion 510 at an angle. The mounting section 533 is connected to the damping section 532 and has an assembly through-hole 531. The bracket 500 is adapted to be mounted on the water heater by a third bolt passing through the assembly through-hole 531. This facilitates the installation of the bracket 500 and allows the second lugs 530 to act as a damping buffer, further reducing the vibration of the water pump 1 and lowering the noise of the water pump 1.

[0067] Advantageously, such as Figures 1-4 As shown, the bracket 500 is manufactured from the same sheet metal. Specifically, the bracket 500 can be first cut into a flat sheet metal, and then the second lug 530 can be bent to form the damping section 532 and the mounting section 533. This facilitates the processing and manufacturing of the bracket 500, reduces the number of parts in the water pump 1, and improves the integration of the water pump 1.

[0068] More advantageously, such as Figures 1-3As shown, a shock-absorbing protective sleeve 800 is sandwiched between the bracket 500 and the heat dissipation base shell 400. In related technologies, the bracket 500 is directly connected to the heat dissipation base shell 400, while the shock-absorbing protective sleeve 800 is located below the bracket 500, between the bracket 500 and the mounting plate of the water heater. This can easily cause the shock-absorbing protective sleeve 800 to block the threaded holes on the water heater when bolting the bracket 500, leading to blind bolting and affecting the assembly efficiency of the water pump 1. By placing the shock-absorbing protective sleeve 800 between the bracket 500 and the heat dissipation base shell 400, the same shock-absorbing effect can be ensured. Moreover, during assembly, the bracket 500 can be installed on the water heater first. Since the shock-absorbing protective sleeve 800 is not located below the bracket 500, the threaded holes will not be blocked by the shock-absorbing protective sleeve 800, avoiding blind bolting, ensuring the installation efficiency of the third bolt, and improving the assembly efficiency of the bracket 500.

[0069] Specifically, the shock-absorbing protective sleeve 800 is provided with a protective sleeve through hole 810. The second bolt 920 passes through the protective sleeve through hole 810. This facilitates the installation and positioning of the shock-absorbing protective sleeve 800.

[0070] Figures 1-7 A water pump 1 according to a specific example of the present invention is shown. Figures 1-7 As shown, the water pump 1 also includes a pump cover 600, which is installed on the upper end face of the shielding sleeve 100. In this way, the pump cover 600 can cover the upper surface of the shielding sleeve 100 and the rotor slot 101. In other words, the outer surfaces of the shielding sleeve 100, the pump cover 600, and the heat dissipation base shell 400 together constitute the outer structure of the water pump 1.

[0071] Specifically, such as Figures 1-7 As shown, the pump cover 600 is provided with a pump cover through hole 610. The first bolt 910 passes through the pump cover through hole 610 and the shielding sleeve through hole 120 and is fitted into the mounting hole 410 to connect the pump cover 600, the shielding sleeve 100 and the heat dissipation base shell 400. In this way, the pump cover 600 can be installed and positioned using the first bolt 910.

[0072] Advantageously, such as Figure 4 As shown, the projection of the bracket 500 on the horizontal plane lies within the outer circle of the projection of the heat dissipation base 400 on the horizontal plane, the outer circle of the projection of the shielding sleeve 100 on the horizontal plane, and the outer circle of the projection of the pump cover 600 on the horizontal plane. Specifically, the projection of the center portion 510 on the horizontal plane lies within the projection of the heat dissipation base 400 on the horizontal plane, the projection of the shielding sleeve 100 on the horizontal plane, and the projection of the pump cover 600 on the horizontal plane. This allows for control of the size of the bracket 500, ensuring that the outer edge of the bracket 500 does not exceed the outer edge of other parts of the water pump 1, preventing the bracket 500 from interfering with the installation of the water pump 1, and making the water pump 1 suitable for more confined installation environments.

[0073] Figures 4-7 A water pump 1 according to a specific embodiment of the present invention is shown. For example... Figures 4-7 As shown, the pump cover 600 includes a cover body 640 and a water outlet connector 630.

[0074] Specifically, the pump cover inlet 620 is located at the center of the top of the cover body 640. The pump cover inlet 620 and the pump cover outlet are integrally formed on the pump cover, and the central axes of the pump cover inlet and the pump cover outlet are perpendicular to each other.

[0075] The cover 640 is provided with a pump cover inlet 620. A water outlet connector 630 is connected to the cover 640, and the water outlet connector 630 has a connecting end connected to the cover 640 and a free end away from the cover 640. The connection between the end face and the circumferential surface of the free end is chamfered to form a chamfered surface 633 at the connection between the end face and the circumferential surface. The minimum angle α1 between the chamfered surface 633 and the axial direction of the free end is less than the minimum angle between the chamfered surface 633 and the radial direction of the free end. This facilitates the connection of the pipeline to the water outlet connector 630, avoids frequent collisions between the water outlet connector 630 and the pipeline when the water pump 1 vibrates, prevents damage to the water outlet connector 630 and the pipeline, and reduces the noise generated by the collision between the water outlet connector 630 and the pipeline, thereby reducing the operating noise of the water pump 1.

[0076] Specifically, such as Figure 5 As shown, the minimum angle α1 between the beveled surface 633 and the axial direction of the free end is 10-25 degrees. This further prevents the water outlet connector 630 from colliding with the pipeline, further improving the reliability of the water outlet connector 630 and reducing noise.

[0077] Advantageously, such as Figure 6 As shown, the outlet connector 630 has a water passage 631, which includes at least a gradually expanding section 6311. The inner diameter of the gradually expanding section 6311 gradually increases from the connecting end to the free end. This allows the water passage 631 to have better hydraulic performance, the outlet connector 630 to have better pressure resistance, and improves the head performance of the water pump 1.

[0078] More specifically, such as Figure 6 As shown, the water passage 631 also includes a straight section 6312 with a uniform inner diameter. The straight section 6312 is connected to the end of the gradually expanding section 6311 near the free end. This facilitates the connection of the water outlet connector 630 to other pipelines.

[0079] More advantageously, such as Figure 6 As shown, the central axes of the gradually widening section 6311 and the straight section 6312 coincide. This further ensures smooth water flow from the water passage 631 and improves the pressure resistance of the water outlet connector 630.

[0080] Furthermore, such as Figure 6 As shown. The axis of the water outlet channel is tangent to the circumferential surface of the inner cavity of the cover. The central axes of the gradually widening section 6311 and the straight section 6312 are perpendicular to the radial direction of the cover 640. This further ensures smooth water flow from the water outlet channel 631 and improves the pressure resistance of the water outlet connector 630.

[0081] Optionally, such as Figure 6 As shown, the minimum angle α2 between the inner circumferential surface of the expanding section 6311 and the axial direction of the expanding section 6311 is 2.5-10 degrees. This can further ensure the hydraulic performance of the water passage 631, ensure smooth water discharge, improve pressure resistance, and improve the head effect of the water pump 1.

[0082] Figure 7 A water pump 1 according to a specific example of the present invention is shown. Figure 7 As shown, the cover 640 includes a top wall 601 and a peripheral wall 602. A pump cover inlet 620 is formed on the top wall 601. The peripheral wall 602 surrounds the top wall 601 and extends downwards, while the top wall 601 extends upwards and inwards from the peripheral wall 602. This design allows the cover 640 to have better pressure resistance, improving the reliability of the pump cover 600.

[0083] Advantageously, such as Figure 7 As shown, the minimum angle α3 between the top wall 601 and the horizontal plane is 2-10 degrees. This further ensures the compressive strength of the cover 640 and further improves the reliability of the pump cover 600.

[0084] Figure 4 A water pump 1 according to a specific example of the present invention is shown. Figure 4 As shown, the cover 640 is provided with circumferential reinforcing ribs 641 extending circumferentially along the cover 640, and multiple radial reinforcing ribs 642 extending radially along the cover 640, with the multiple radial reinforcing ribs 642 spaced apart circumferentially along the cover 640. This allows the circumferential reinforcing ribs 641 and radial reinforcing ribs 642 to reinforce the structural strength of the cover 640 along the direction of force application, thereby ensuring the structural strength and reliability of the cover 640.

[0085] The number of radial stiffeners 642 is the same as or an integer multiple of the number of coils in stator 200.

[0086] Advantageously, such as Figure 4 As shown, the water outlet connector 630 is provided with annular reinforcing ribs 632 extending circumferentially along the water outlet connector 630. In this way, the annular reinforcing ribs 632 can be used to reinforce the structural strength of the water outlet connector 630, thereby ensuring the structural strength and reliability of the water outlet connector 630.

[0087] More advantageously, such as Figure 4 As shown, the annular reinforcing rib 632 is connected to at least one of the plurality of radial reinforcing ribs 642. This allows the radial reinforcing rib 642 and the annular reinforcing rib 632 to be connected as a whole, facilitating the mutual transmission of force and making the force on the pump cover 600 more uniform, thereby further improving the structural strength and reliability of the pump cover 600.

[0088] Specifically, such as Figure 1 As shown, the circumferential reinforcing rib 641 is oriented vertically relative to the stator coil of the pump where the pump cover 600 is located. This allows the circumferential reinforcing rib 641 to effectively reinforce the pump cover 600 according to the position of the stator coil, resulting in a more even and reasonable stress distribution on the pump cover 600 and ensuring the structural strength of the pump cover.

[0089] Optionally, the pump cover 600 is made of glass fiber reinforced polyphenylene sulfide material. This further ensures the structural strength and toughness of the pump cover 600, thereby guaranteeing its reliability.

[0090] Figure 1 , Figure 3 , Figure 8 and Figure 9 A water pump 1 according to a specific example of the present invention is shown. Figure 1 , Figure 3 Figure 8 and Figure 9 As shown, the water pump 1 also includes an impeller 700, which comprises a first plate 710, a second plate 720, and blades 730. The first plate 710 has an impeller inlet 701. The second plate 720 is connected to the rotor 300 and is spaced apart from the first plate 710 to form a water passage gap 702. The blades 730 are disposed within the water passage gap 702 and spaced circumferentially along the first plate 710. This allows water to enter the water passage gap 702 from the impeller inlet 701. Driven by the rotor 300, the impeller 700 rotates, and the water in the water passage gap 702 flows away from the center of the impeller 700 due to the agitation of the blades 730, thus driving the water flow.

[0091] Specifically, such as Figure 1 , Figure 3 and Figure 8As shown, the rotor 300 includes a rotor body 310 and a rotor magnet 320. The rotor body 310 is integrally formed with the second plate 720. The rotor magnet 320 is inlaid and injection molded with the rotor body 310, and the rotor magnet 320 is sleeved on the outside of the rotor body 310. Specifically, the rotor body 310 is cylindrical and includes a portion above the rotor magnet 320 and a portion extending into the rotor magnet 320. The rotor magnet 320 is sleeved on the outside of the rotor body 310 in a barrel shape. This can further simplify the assembly process of the water pump 1 and improve the assembly efficiency and integration of the water pump 1.

[0092] More specifically, such as Figure 8 As shown, the ratio of the distance b between the first plate 710 and the second plate 720 to the diameter D2 of the first plate 710 is 0.02-0.15. This makes the structure of the impeller 700 more reasonable, reduces the water flow resistance of the impeller 700, reduces the noise and vibration when the impeller 700 rotates, and reduces the power consumption of the water pump.

[0093] Specifically, the distance b between the first plate 710 and the second plate 720 is 0.05-0.15 in ratio to the total height of the rotor body 310 and the rotor magnet 320 in the vertical direction. This makes the structure of the impeller 700 more reasonable, reduces the water flow resistance of the impeller 700, reduces the noise and vibration when the impeller 700 rotates, and reduces the power consumption of the water pump.

[0094] Advantageously, such as Figure 8 As shown, the blade 730 is integrally formed on the first plate 710. This simplifies the assembly process of the impeller 700, reduces the number of parts in the impeller 700, and improves the production efficiency of the impeller 700.

[0095] More advantageously, such as Figure 8 As shown, the second plate 720 has a groove, and the lower end of the blade 730 fits into the groove. This groove allows the blade 730 to be positioned, improving its stability and facilitating the connection between the first plate 710 and the second plate 720.

[0096] Furthermore, the blade 730 is connected to the second plate 720 by laser welding. This ensures the connection strength between the first plate 710 and the second plate 720, the sealing between the lower end of the blade 730 and the second plate 720, and the driving effect of the impeller 700 on the water flow.

[0097] Optionally, such as Figure 8As shown, the distance b between the first plate 710 and the second plate 720 is 1-5 mm, and the diameter D2 of the first plate 710 is 30-50 mm. Specifically, the distance b between the first plate 710 and the second plate 720 is 3 mm, and the diameter D2 of the first plate 710 is 40 mm. This allows for a more rational design of the impeller 700's dimensions.

[0098] Figure 9 A water pump 1 according to a specific example of the present invention is shown. Figure 9 As shown, the diameter D1 of the impeller inlet 701 is 8-22 mm. This allows for a more reasonable size of the impeller inlet 701, ensuring sufficient water intake.

[0099] Specifically, such as Figure 9 As shown, the radius R3 of the imaginary circle tangent to the inner ends of multiple blades 730 is 8-12 mm. This allows for a more rational arrangement of the blades 730, ensuring the driving effect of the impeller 700 on the water flow.

[0100] More specifically, such as Figure 9 As shown, the blade 730 is arc-shaped and has a first arc surface 731 and a second arc surface 732. The first arc surface 731 is located on the convex side of the arc of the blade 730, and the second arc surface 732 is located on the concave side of the arc of the blade 730. The radius R1 of the first arc surface 731 is 10-36 mm, and the radius R2 of the second arc surface 732 is 5-25 mm. This makes the structure of the blade 730 more reasonable, reduces the water flow resistance of the blade 730, and ensures the driving effect of the impeller 700 on the water flow.

[0101] Advantageously, such as Figure 9 As shown, the first arc surface 731 is connected to both the inner and outer end faces of the blade 730. The inner end of the second arc surface 732 is connected to the inner end face of the blade 730, and the outer end of the second arc surface 732 is connected to the outer end face of the blade 730 via an inclined surface 733. The inclined surface 733 extends outward from the second arc surface 732 toward the first arc surface 731, and the minimum angle c1 between the inclined surface 733 and the radial direction of the impeller 700 is 0-25 degrees. This makes the structure of the blade 730 more reasonable, reduces the water flow resistance of the blade 730, and further ensures the driving effect of the blade 730 on the water flow.

[0102] Optionally, such as Figure 9As shown, the angle c2 formed by the imaginary line connecting the center of the first arc surface 731 of each blade 730 to the center of the first plate 710, and the imaginary line connecting the inner end of the first arc surface 731 of the blade 730 to the center of the first plate 710, is 40-95 degrees. The angle c3 formed by the imaginary line connecting the center of the second arc surface 732 of each blade 730 to the center of the first plate 710, and the imaginary line connecting the inner end of the first arc surface 731 of the blade 730 to the center of the first plate 710, is 45-75 degrees. This allows for a more rational arrangement of the blades 730, reduces the water flow resistance of the blades 730, and ensures the driving effect of the impeller 700 on the water flow.

[0103] Specifically, such as Figures 1-3 As shown, sealing rings 930 are provided between the pump cover 600 and the shielding sleeve 100, between the pump cover 600 and the impeller 700, and outside the outlet connector 630. This ensures the sealing performance of the water pump 1. Figure 1 and Figure 3 As shown, gaskets 940 are provided between the rotor 300 and the shielding sleeve 100, and between the rotor 300 and the pump cover 600. The gaskets 940 can be ceramic gaskets. This ensures smooth rotation of the rotor 300, reduces frictional resistance, and improves the rotational stability of the rotor 300.

[0104] A water heater according to an embodiment of the present invention is described below. The water heater according to an embodiment of the present invention includes a water pump 1 according to the above embodiment of the present invention.

[0105] The water heater according to the embodiments of the present invention has the advantages of low noise and high integration by utilizing the water pump 1 according to the above embodiments of the present invention.

[0106] Other configurations and operations of the water heater according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0107] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the 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.

[0108] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water pump, characterized in that, include: A shielding sleeve, wherein the end face of the shielding sleeve is provided with rotor slots and stator slots; Stator, which fits into the stator slot; A rotating shaft is disposed in the rotor slot and fixedly connected to the shielding sleeve. The rotating shaft and the shielding sleeve are integrally formed or injection molded into one piece. The rotor is rotatably fitted in the rotor slot and sleeved outside the rotating shaft, and both the stator and the rotor are installed inside the shielding sleeve; A pump cover is installed on the upper end face of the shielding sleeve, and the pump cover has an integrally formed pump cover inlet and a pump cover outlet. A heat dissipation base shell and a bracket are provided. The heat dissipation base shell is installed on the lower end face of the shielding sleeve, and the bracket is installed below the heat dissipation base shell. The bracket is suitable for installation on a water heater. The heat dissipation base shell is provided with a mounting hole, and the shielding sleeve is provided with a shielding sleeve through hole. The shielding sleeve and the heat dissipation base shell are connected by a first bolt that passes through the shielding sleeve through hole and engages in the mounting hole. The bracket is provided with a bracket through hole, and the bracket and the heat dissipation base shell are connected by a second bolt that passes through the bracket through hole and engages in the mounting hole.

2. The water pump according to claim 1, characterized in that, It also includes a circuit board, a heat dissipation cavity is formed in the heat dissipation base shell, the circuit board is disposed in at least one of the stator slot and the heat dissipation cavity and is electrically connected to the stator, and the stator and the circuit board are spaced apart to form a heat dissipation gap between the stator and the circuit board.

3. The water pump according to claim 2, characterized in that, The heat dissipation cavity is connected to the stator slot.

4. The water pump according to claim 1, characterized in that, The bracket includes a central portion, a plurality of first lugs, and a plurality of second lugs. The plurality of first lugs are spaced apart circumferentially along the central portion, and the plurality of second lugs are spaced apart circumferentially along the central portion. A through hole is formed on the first lug. The second lug includes a shock-absorbing section and a mounting section. The shock-absorbing section extends downward and outward from the central portion. The mounting section is connected to the shock-absorbing section and is provided with an assembly through hole. The bracket is adapted to be mounted on a water heater by a third bolt passing through the assembly through hole.

5. The water pump according to claim 1, characterized in that, The projection of the bracket on the horizontal plane is located within the circumcircle of the projection of the shielding sleeve on the horizontal plane.

6. The water pump according to claim 1, characterized in that, The support frame is equipped with a shock-absorbing protective sleeve.

7. The water pump according to claim 1, characterized in that, The pump cover includes: A cover, wherein the cover is provided with the pump cover inlet; The water outlet connector has a water outlet formed on the pump cover and is connected to the cover body. The water outlet connector has a connecting end connected to the cover body and a free end away from the cover body. The end face of the free end is chamfered at the connection with the circumferential surface to form a chamfered surface at the connection with the end face of the free end and the circumferential surface. The minimum angle between the chamfered surface and the axial direction of the free end is less than the minimum angle between the chamfered surface and the radial direction of the free end.

8. The water pump according to claim 7, characterized in that, The minimum angle between the beveled surface and the axial direction of the free end is 10-25 degrees.

9. The water pump according to claim 7, characterized in that, The water outlet connector has a water passage, which includes at least a gradually expanding section. The inner diameter of the gradually expanding section gradually increases from the connecting end to the free end. The minimum angle between the inner circumferential surface of the gradually expanding section and the axial direction of the gradually expanding section is 2.5-10 degrees.

10. The water pump according to claim 7, characterized in that, The cover includes: The pump cover inlet is formed on the top wall; The peripheral wall is arranged around the top wall and extends downward, while the top wall extends upward and inward from the peripheral wall, and the minimum angle between the top wall and the horizontal plane is 2-10 degrees.

11. The water pump according to claim 7, characterized in that, The cover body is provided with circumferential reinforcing ribs extending circumferentially along the cover body, and a plurality of radial reinforcing ribs extending radially along the cover body. The plurality of radial reinforcing ribs are spaced apart circumferentially along the cover body. The water outlet connector is provided with annular reinforcing ribs extending circumferentially along the water outlet connector. The annular reinforcing ribs are connected to at least one of the plurality of radial reinforcing ribs.

12. The water pump according to claim 1, characterized in that, It also includes an impeller, the impeller comprising: The first plate has an impeller inlet. The second plate is connected to the rotor and is spaced apart from the first plate to form a water passage gap. The blades are disposed within the water passage gap and are spaced apart circumferentially along the first plate, wherein the ratio of the distance between the first plate and the second plate to the diameter of the first plate is 0.02-0.

15.

13. The water pump according to claim 12, characterized in that, The distance between the first plate and the second plate is 1-5 mm, and the diameter of the first plate is 30-50 mm.

14. The water pump according to claim 12, characterized in that, The diameter of the impeller inlet is 8-22 mm, and the radius of the imaginary circle tangent to the inner ends of the plurality of blades is 8-12 mm.

15. The water pump according to claim 12, characterized in that, The blade is arc-shaped and has a first arc surface and a second arc surface that are opposite each other. The first arc surface is located on the side of the arc-shaped protrusion of the blade, and the second arc surface is located on the side of the arc-shaped concavity of the blade.

16. The water pump according to claim 15, characterized in that, The radius of the first arc surface is 10-36 mm, and the radius of the second arc surface is 5-25 mm.

17. The water pump according to claim 15, characterized in that, The first arc surface is connected to the inner end face and the outer end face of the blade, the inner end of the second arc surface is connected to the inner end face of the blade, and the outer end of the second arc surface is connected to the outer end face of the blade through an inclined surface. The inclined surface extends outward from the second arc surface to the first arc surface, and the minimum angle between the inclined surface and the radial direction of the impeller is 0-25 degrees.

18. The water pump according to claim 15, characterized in that, The angle between the imaginary line connecting the center of the first arc surface of each blade to the center of the first plate and the imaginary line connecting the inner end of the first arc surface of the blade to the center of the first plate is 40-95 degrees, and the angle between the imaginary line connecting the center of the second arc surface of each blade to the center of the first plate and the imaginary line connecting the inner end of the first arc surface of the blade to the center of the first plate is 45-75 degrees.

19. A water heater, characterized in that, Includes the water pump according to any one of claims 1-18.

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