CN114109853A

CN114109853A - Water pump and water heater with same

Info

Publication number: CN114109853A
Application number: CN202010880401.6A
Authority: CN
Inventors: 张小林; 梁国荣; 晏勇; 郑伟城; 欧常福
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-03-01
Anticipated expiration: 2040-08-27
Also published as: WO2022042694A1; CN114109853B

Abstract

The invention discloses a water pump and a water heater with the same, wherein the water pump comprises: the end face of the shielding sleeve is provided with a rotor slot and a stator slot, and the stator slot is positioned outside the rotor slot in the radial direction of the shielding sleeve; a stator fitted within the stator slot; a rotor rotatably disposed within the rotor slot; the heat dissipation base shell is arranged on the shielding sleeve, and a heat dissipation cavity is formed in the heat dissipation base shell; and the circuit board is arranged in the heat dissipation cavity and is electrically connected with the stator. The water pump provided by the embodiment of the invention has the advantages of small volume, good heat dissipation effect and the like.

Description

Water pump and water heater with same

Technical Field

The invention relates to the technical field of electric appliance manufacturing, in particular to a water pump and a water heater with the water pump.

Background

In order to avoid discharging cold water, a centrifugal water pump needs to be added to a water inlet pipeline to enable water in the pipeline to flow at a certain flow rate.

The centrifugal water pump in the related art occupies a large volume and is not suitable for being installed in a water heater with a small space, and for this reason, a circuit control part of the water pump is integrated in the water pump, but the electric control structure is difficult to dissipate heat, so that the reliability of the electric control structure is influenced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the water pump provided by the invention has the advantages of small volume, good heat dissipation effect and the like.

Therefore, the invention also provides a water heater with the water pump.

To achieve the above object, an embodiment according to a first aspect of the present invention proposes a water pump including: the end face of the shielding sleeve is provided with a rotor slot and a stator slot, and the stator slot is positioned outside the rotor slot in the radial direction of the shielding sleeve; a stator fitted within the stator slot; a rotor rotatably disposed within the rotor slot; the heat dissipation base shell is arranged on the shielding sleeve, and a heat dissipation cavity is formed in the heat dissipation base shell; and the circuit board is arranged in the heat dissipation cavity and is electrically connected with the stator.

The water pump disclosed by the embodiment of the invention has the advantages of small volume, good heat dissipation effect and the like.

In addition, the water pump according to the above embodiment of the present invention may further have the following additional technical features:

according to an embodiment of the invention, the heat dissipation base housing is mounted on a lower end face of the shielding sleeve, the stator slot is formed on the lower end face of the shielding sleeve, the rotor slot is formed on an upper end face of the shielding sleeve, and the heat dissipation cavity is communicated with the stator slot.

According to one embodiment of the invention, the circuit board is adjacent to a bottom wall of the heat-dissipating base housing.

According to one embodiment of the invention, the water pump further comprises a bracket mounted below the heat sink base housing, the bracket being adapted to be mounted on a water heater.

According to one embodiment of the invention, the heat-dissipating base shell is provided with a mounting hole, the shielding sleeve is provided with a shielding sleeve through hole, the shielding sleeve and the heat-dissipating base shell are connected through a first bolt which penetrates through the shielding sleeve through hole and is matched in the mounting hole, the bracket is provided with a bracket through hole, and the bracket and the heat-dissipating base shell are connected through a second bolt which penetrates through the bracket through hole and is matched in the mounting hole.

According to one embodiment of the invention, the bracket comprises a central part, a plurality of first lugs and a plurality of second lugs, the plurality of first lugs are arranged at intervals along the circumferential direction of the central part, the plurality of second lugs are arranged at intervals along the circumferential direction of the central part, the bracket through holes are formed on the first lugs, the second lugs comprise shock absorption sections and installation sections, the shock absorption sections extend obliquely downwards and outwards from the central part, the installation sections are connected with the shock absorption sections, the installation sections are provided with assembly through holes, and the bracket is suitable for being installed on the water heater through third bolts passing through the assembly through holes.

According to one embodiment of the invention, the bracket is machined from the same sheet material.

According to one embodiment of the invention, a shock absorbing and protecting jacket is clamped between the bracket and the heat dissipating base shell.

According to one embodiment of the invention, the water pump further comprises a pump cover, and the pump cover is installed on the upper end face of the shielding sleeve.

According to one embodiment of the invention, a pump cover through hole is formed in the pump cover, and the first bolt penetrates through the pump cover through hole and the shield sleeve through hole and is matched with the mounting hole to connect the pump cover, the shield sleeve and the heat dissipation base shell.

According to one embodiment of the invention, the projection of the bracket on the horizontal plane is positioned in a circumscribed circle of the projection of the heat dissipation base shell on the horizontal plane, the shielding sleeve is positioned in a circumscribed circle of the projection of the shielding sleeve on the horizontal plane, and the pump cover is positioned in a circumscribed circle of the projection of the pump cover on the horizontal plane.

According to one embodiment of the invention, the heat-dissipating base housing is an aluminum base housing.

According to one embodiment of the invention, the water pump further comprises an impeller, the impeller comprising: the first plate body is provided with an impeller water inlet; the second plate body is connected with the rotor, and the second plate body and the first plate body are spaced to form a water passing gap; the blades are arranged in the water passing gap and are arranged along the circumferential direction of the first plate body at intervals.

According to one embodiment of the invention, the rotor comprises: a rotor body integrally formed with the second plate body; and the rotor magnet and the rotor body are integrally formed in an injection molding mode.

An embodiment according to a second aspect of the invention proposes a water heater comprising a water pump according to an embodiment of the first aspect of the invention.

According to the water heater provided by the embodiment of the invention, the water pump provided by the embodiment of the first aspect of the invention has the advantages of strong reliability and the like.

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.

Drawings

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

fig. 1 is a sectional view of a water pump according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a water pump according to an embodiment of the present invention.

Fig. 3 is an exploded view of a water pump according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a water pump according to an embodiment of the present invention.

Fig. 5 is a structural schematic diagram of a pump cover of a water pump according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view of a pump cover of a water pump according to an embodiment of the present invention.

Fig. 7 is a partial cross-sectional view of a pump cover of a water pump according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of a rotor and an impeller of a water pump according to an embodiment of the present invention.

Fig. 9 is a partial sectional view of an impeller of a water pump according to an embodiment of the present invention.

Reference numerals: the water pump 1, the shield 100, the rotor groove 101, the rotating shaft 110, the shield through hole 120, the guide edge 130, the stator 200, the support leg 210, the rotor 300, the rotor body 310, the rotor magnet 320, the heat dissipation base shell 400, the heat dissipation cavity 401, the positioning groove 402, the wire through hole 403, the mounting hole 410, the circuit board 420, the power cord 421, the bracket 500, the center portion 510, the first lug 520, the bracket through hole 521, the second lug 530, the assembly through hole 531, the damper section 532, the mounting section 533, the pump cover 600, the top wall 601, the peripheral wall 602, the pump cover through hole 610, the pump cover water inlet 620, the water outlet connector 630, the water passage 631, the divergent section 6311, the straight section 6312, the annular reinforcing rib 632, the oblique surface 633, the cover body 640, the circumferential reinforcing rib 641, the radial reinforcing rib 642, the impeller 700, the impeller water inlet 701, the water passage gap 702, the first plate body 710, the second plate body 720, the blade 730, the first arc 731, the second arc surface 732, the oblique surface 733, the stator magnet 200, the stator core 210, the stator 300, the stator magnet 300, the rotor magnet assembly, the rotor assembly, and the rotor assembly, Shock attenuation lag 800, lag via hole 810, first bolt 910, second bolt 920, sealing washer 930, gasket 940.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A water pump 1 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 9, a water pump 1 according to an embodiment of the present invention includes a shield case 100, a stator 200, a rotor 300, a heat-dissipating base case 400, and a circuit board 420.

On the end face of the shielding 100, rotor slots 101 and stator slots are provided, which are located outside the rotor slots 101 in the radial direction of the shielding 100. The stator 200 fits within the stator slots. The rotor 300 is rotatably provided in the rotor groove 101. The heat-dissipating base housing 400 is mounted on the shield case 100, and a heat-dissipating chamber 401 is formed in the heat-dissipating base housing 400. The circuit board 420 is disposed in the heat dissipation chamber 401 and electrically connected to the stator 200.

According to the water pump 1 provided by the embodiment of the invention, the circuit board 420 is arranged in the heat dissipation cavity 401, and the electric control structure of the water pump 1 can be arranged in the water pump 1, so that the volume of the water pump 1 can be reduced, and the integration level of the water pump 1 can be improved.

In addition, by arranging the heat dissipation base shell 400, compared with a water pump in the related art, the heat dissipation base shell 400 can be used for dissipating heat of the circuit board 420, so that heat generated by the stator 200 during operation and heat generated by other elements on the circuit board 420 are prevented from affecting normal operation of the circuit board 420, and stable operation of the circuit board 420 at a proper temperature is guaranteed.

Therefore, the water pump 1 provided by the embodiment of the invention has the advantages of small volume, good heat dissipation effect and the like.

A water pump 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

In some embodiments of the present invention, as shown in fig. 1 to 9, a water pump 1 according to an embodiment of the present invention includes a shield case 100, a stator 200, a rotor 300, a heat-dissipating base case 400, and a circuit board 420.

Specifically, a heat dissipation chamber 401 is formed in the heat dissipation base case 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. Therefore, the heat dissipation base shell 400 can be used for dissipating heat of the circuit board 420, and heat generated by the stator 200 during operation and heat generated by other elements on the circuit board 420 are prevented from influencing normal operation of the circuit board 420, so that stable operation of the circuit board 420 at a proper temperature is ensured.

Specifically, the lower end surface of the stator 200 is provided with a plurality of legs 210, the legs 210 are spaced apart along the circumferential direction of the stator 200, and the legs 210 are engaged with the circuit board 420. This facilitates the installation of the circuit board 420, and also facilitates the control of the distance between the circuit board 420 and the stator 200, and facilitates the approach of the circuit board 420 to the heat dissipation base housing 400, so as to facilitate the heat dissipation of the circuit board 420.

The lower end surface of the shielding sleeve 100 is provided with a guiding edge 130, and the guiding edge 130 is adapted to extend into the heat dissipation cavity 401. This can be guided by the guiding edge to facilitate the fitting of the shielding case 100 with the heat dissipating base housing 400.

The heat-dissipating base case 400 is provided at a lower portion of a circumferential wall thereof with a positioning groove 402, and a portion of the circuit board 420 is fitted in the positioning groove 402. This may facilitate mounting of circuit board 420 and positioning of circuit board 420.

The peripheral wall of the heat dissipation base shell 400 is provided with a wire through hole 403, the wire through hole 403 is communicated with the upper end surface of the heat dissipation base shell 400, and the power line 421 is electrically connected with the circuit board 420 through the wire through hole 403. This may facilitate connection of the power cord 421 to the circuit board 420.

Specifically, as shown in fig. 1 and 3, the water pump 1 further includes a rotating shaft 110, and the rotating shaft 110 is disposed in the rotor groove 101 and is integrally formed with the shield case 100. The rotor 300 is rotatably fitted in the rotor groove 101 and is fitted over the rotation shaft 110.

Through with pivot 110 and housing 100 fixed connection, pivot 110 is fixed motionless with housing 100, rotor 300 cover is established on pivot 110 like this, rotor 300 is relative pivot and housing and is rotated, compare the technical scheme that pivot and pump cover link to each other among the correlation technique, can save the process of assembling pivot 110 on housing 100, not only can improve the assembly efficiency of pivot 110, improve the production efficiency of water pump 1, part quantity when reducing water pump 1 assembly, improve the integration level of water pump 1, and can avoid the assembly process to influence the position precision of pivot 110, improve the stability of pivot 110, reduce the noise that produces when water pump 1 moves, travelling comfort when improving the user and using the water heater. Moreover, the rotor slots 101 and the stator slots are arranged on the shielding sleeve 100, so that the stator 200 and the rotor 300 can be intensively installed in the shielding sleeve 100, the shielding sleeve 100 can play roles in positioning, supporting and protecting the stator 200 and the rotor 300 while providing an insulation shielding effect, other structures for positioning and protecting the stator 200 and the rotor 300 can be omitted, the structure of the water pump 1 is further simplified, and the integration level of the water pump 1 is improved.

Alternatively, the shaft 110 is integrally formed or injection molded with the shielding sleeve 100. This facilitates the rotation shaft 110 and the shield case 100 to form an integrated structure, thereby improving the stability and the integration of the water pump 1.

Specifically, the rotating shaft 110 is a ceramic shaft. This allows the rotation shaft 110 to have good wear resistance and to avoid interference with the rotation of the rotor 300.

More specifically, as shown in fig. 1 and 3, a rotor groove 101 is formed on an upper end surface of the shield case 100 (a vertical direction is indicated by an arrow in the drawing and is merely for convenience of description, and is not a limitation on an actual arrangement direction of the water pump 1), and a stator groove is formed on a lower end surface of the shield case 100. This may facilitate the installation of the stator 200 and the rotor 300, and may facilitate the connection of the rotor 300 and the stator 200 to other structures.

Fig. 1 to 4 show a water pump 1 according to one specific example of the present invention. As shown in fig. 1 to 4, the water pump 1 further includes a bracket 500, the heat-dissipating base housing 400 is mounted on the lower end surface of the shielding sleeve 100, the bracket 500 is mounted below the heat-dissipating base housing 400, and the bracket 500 is adapted to be mounted on a water heater. This allows the water pump 1 to be mounted on the water heater using the bracket 500.

Further, as shown in fig. 1, a heat dissipation chamber 401 communicates with the stator slot. This facilitates electrical connection between the circuit board 420 and the stator 200 and also allows heat dissipation from the stator 200. As shown in fig. 1, the circuit board 420 is adjacent to the bottom wall of the heat-dissipating base case 400. This can improve the heat dissipation effect to the circuit board 420. The heat dissipation base case 400 may be an aluminum base case. This can ensure the structural strength and the heat dissipation effect of the heat dissipation base case 400.

Specifically, as shown in fig. 1 to 4, a mounting hole 410 is formed in the heat dissipation base housing 400, a shielding sleeve via hole 120 is formed in the shielding sleeve 100, the shielding sleeve 100 and the heat dissipation base housing 400 are connected by a first bolt 910 passing through the shielding sleeve via hole 120 and fitting in the mounting hole 410, a bracket via hole 521 is formed in the bracket 500, and the bracket 500 and the heat dissipation base housing 400 are connected by a second bolt 920 passing through the bracket via hole 521 and fitting in the mounting hole 410. The assembly of each structure of water pump 1 of can being convenient for like this, first bolt 910 and second bolt 920 sharing mounting hole 410 can reduce the process quantity of screw hole moreover, reduce water pump 1's manufacturing procedure, improve water pump 1's production efficiency, reduce the processing cost.

More specifically, as shown in fig. 1 to 4, 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 along a circumferential direction of the central portion 510, the plurality of second lugs 530 are spaced apart along the circumferential direction of the central portion 510, bracket through holes 521 are formed on the first lugs 520, the second lugs 530 include damper segments 532 and mounting segments 533, the damper segments 532 extend obliquely downward and outward from the central portion 510, the mounting segments 533 are connected to the damper segments 532, mounting segments 533 are provided with mounting through holes 531, and the bracket 500 is adapted to be mounted on the water heater by third bolts passing through the mounting through holes 531. Therefore, the support 500 can be conveniently arranged, and the second lug 530 can be utilized to play a role in damping and buffering, so that the vibration of the water pump 1 is further reduced, and the noise of the water pump 1 is reduced.

Advantageously, as shown in fig. 1-4, the bracket 500 is machined from the same sheet material. Specifically, the bracket 500 may be cut into a flat plate, and then the second lug 530 is bent to form the shock absorbing section 532 and the mounting section 533. Therefore, the processing and the manufacturing of the bracket 500 can be facilitated, the number of parts of the water pump 1 is reduced, and the integration level of the water pump 1 is improved.

More advantageously, as shown in fig. 1-3, a shock-absorbing shield 800 is sandwiched between the bracket 500 and the heat-dissipating base housing 400. Because the bracket 500 is directly connected with the heat dissipation base shell 400 in the related art, and the shock absorption and protection sleeve 800 is arranged below the bracket 500 and between the bracket 500 and the mounting plate of the water heater, the shock absorption and protection sleeve 800 is easy to block a threaded hole on the water heater when the bracket 500 is installed with bolts, so that the bolts are blindly hit, and the assembly efficiency of the water pump 1 is affected. Through setting up shock attenuation lag 800 between support 500 and heat dissipation base shell 400, can guarantee same shock attenuation effect, can install support 500 on the water heater earlier when the assembly moreover, because shock attenuation lag 800 does not set up in support 500 below, the screw hole can not blocked by shock attenuation lag 800, can avoid the condition of bolt blind beating to take place, guarantees the installation effectiveness of third bolt, improves support 500's assembly efficiency.

Specifically, the shock-absorbing protection sleeve 800 is provided with a protection sleeve through hole 810. The second bolt 920 passes through the lag through hole 810. This may facilitate installation and positioning of the shock absorbing protective sleeve 800.

Fig. 1 to 7 show a water pump 1 according to one specific example of the present invention. As shown in fig. 1 to 7, the water pump 1 further includes a pump cover 600, and the pump cover 600 is attached to the upper end surface of the shield 100. This allows the upper surface of the shield case 100 to be covered with the pump cover 600, covering the rotor slot 101. In other words, the outer surfaces of the shield 100, the pump cover 600, and the heat dissipation base 400 together constitute the outer structure of the water pump 1.

Specifically, as shown in fig. 1-7, a pump cover through hole 610 is formed in the pump cover 600, and a first bolt 910 is fitted to the attachment hole 410 through the pump cover through hole 610 and the shield cover through hole 120 to connect the pump cover 600, the shield cover 100, and the heat dissipation base 400. This allows the pump cover 600 to be mounted and positioned using the first bolts 910.

Advantageously, as shown in fig. 4, the projection of the bracket 500 in the horizontal plane is located within the circumscribed circle of the projection of the heat-dissipating base housing 400 in the horizontal plane and within the circumscribed circle of the projection of the shield case 100 in the horizontal plane and within the circumscribed circle of the projection of the pump cover 600 in the horizontal plane. Specifically, the projection of the center portion 510 on the horizontal plane is located within the projection of the heat dissipation base case 400 on the horizontal plane, within the projection of the shield case 100 on the horizontal plane, and within the projection of the pump cover 600 on the horizontal plane. Can control support 500's size like this, make support 500's outside border profile no longer than the outside border of water pump 1 other parts, avoid support 500 to disturb the installation of water pump 1, make water pump 1 be suitable for narrower and smaller installation environment.

Fig. 4-7 show a water pump 1 according to one embodiment of the invention. As shown in fig. 4-7, the pump cap 600 includes a cap body 640 and a water outlet joint 630.

Specifically, the pump cover water inlet 620 is disposed at a top center position of the cover 640. Pump cover water inlet 620 and pump cover delivery port an organic whole are formed at on the pump cover, the central axis of pump cover water inlet and pump cover delivery port sets up perpendicularly.

The cover 640 is provided with a pump cover water inlet 620. The water outlet joint 630 is connected with the cover body 640, the water outlet joint 630 is provided with a connecting end connected with the cover body 640 and a free end far away from the cover body 640, the joint of the end surface of the free end and the peripheral surface is chamfered to form a bevel surface 633 at the joint of the end surface of the free end and the peripheral surface, and the minimum angle a1 between the bevel surface 633 and the axial direction of the free end is smaller than the minimum angle between the bevel surface 633 and the radial direction of the free end. Can be convenient for like this the pipeline links to each other with water connectors 630, and water connectors 630 frequently collides with the pipeline when avoiding water pump 1 vibrations, avoids water connectors 630 and pipeline to take place to damage, can reduce the noise that water connectors 630 and pipeline collision produced moreover to reduce water pump 1's noise at work.

Specifically, as shown in FIG. 5, the minimum angle a1 between the bevel 633 and the free end axis is 10-25 mm. Therefore, the water outlet joint 630 can be further prevented from colliding with the pipeline, the reliability of the water outlet joint 630 is further improved, and noise is reduced.

Advantageously, as shown in fig. 6, a water passage 631 is provided in the water outlet joint 630, and the water passage 631 at least comprises a divergent section 6311, and the inner diameter of the divergent section 6311 gradually increases from the connecting end to the free end. Therefore, the water channel 631 has better hydraulic performance, the water outlet joint 630 has better pressure resistance, and the lift performance of the water pump 1 is improved.

More specifically, as shown in FIG. 6, the water passage 631 further includes a straight section 6312, the straight section 6312 has a uniform inner diameter, and the straight section 6312 is connected to the end of the divergent section 6311 near the free end. This may facilitate connection of the water outlet joint 630 to other pipes.

More advantageously, as shown in fig. 6, the central axes of the diverging 6311 and straight 6312 coincide. Therefore, the water outlet of the water channel 631 can be further ensured to be smooth, and the pressure resistance of the water outlet joint 630 is improved.

Further, as shown in fig. 6. The axis of the water outlet channel is tangent to the circumferential surface of the cavity at the inner side of the cover body. The central axis of the divergent section 6311 and the straight section 6312 is perpendicular to the radial direction of the cap 640. Therefore, the water outlet of the water channel 631 can be further ensured to be smooth, and the pressure resistance of the water outlet joint 630 is improved.

Alternatively, as shown in fig. 6, the minimum angle a2 between the inner peripheral surface of the divergent section 6311 and the axial direction of the divergent section 6311 is 2.5 to 10 degrees. Therefore, the hydraulic performance of the water channel 631 can be further ensured, the smooth water outlet is ensured, the pressure resistance is improved, and the lift effect of the water pump 1 is improved.

Fig. 7 shows a water pump 1 according to one specific example of the present invention. As shown in fig. 7, the cover 640 includes a top wall 601 and a peripheral wall 602. A pump cap water inlet 620 is formed in the top wall 601. The peripheral wall 602 is disposed around the top wall 601 and extends downward, and the top wall 601 extends obliquely upward and inward from the peripheral wall 602. Thus, the cover 640 has better pressure resistance and the reliability of the pump cover 600 is improved.

Advantageously, as shown in fig. 7, the minimum angle a3 between the top wall 601 and the horizontal plane is 2-10 degrees. Thus, the pressure resistance of the cover 640 can be further ensured, and the reliability of the pump cover 600 can be further improved.

Fig. 4 shows a water pump 1 according to a specific example of the present invention. As shown in fig. 4, the cover 640 is provided with a circumferential rib 641 extending in the circumferential direction of the cover 640, the cover 640 is provided with a plurality of radial ribs 642 extending in the radial direction of the cover 640, and the plurality of radial ribs 642 are provided at intervals in the circumferential direction of the cover 640. The number of the radial ribs 642 is the same as the number of the coils of the stator 200 or an integral multiple of the number of the coils of the stator 200. Thus, the circumferential reinforcing rib 641 and the radial reinforcing rib 642 can reinforce the structural strength of the cover 640 along the stress direction of the cover 640, thereby ensuring the structural strength and reliability of the cover 640.

Advantageously, as shown in fig. 4, the water outlet connector 630 is provided with an annular rib 632 extending along the circumferential direction of the water outlet connector 630. Thus, the structural strength of the water outlet joint 630 can be reinforced by the annular reinforcing rib 632, so that the structural strength and reliability of the water outlet joint 630 are ensured.

More advantageously, as shown in FIG. 4, the annular bead 632 is connected to at least one of a plurality of radial beads 642. Therefore, the radial reinforcing ribs 642 and the annular reinforcing ribs 632 are connected into a whole, so that stress is conveniently transferred, the stress of the pump cover 600 is more uniform, and the structural strength and the reliability of the pump cover 600 are further improved.

Specifically, as shown in fig. 1, the circumferential reinforcing rib 641 is vertically opposed to a stator coil of the water pump where the pump cover 600 is located. Can make circumference strengthening rib 641 rationally strengthen pump cover 600 to the position of stator coil like this, make the atress of pump cover 600 more even reasonable, guarantee the structural strength of pump cover.

Optionally, the pump cover 600 is a piece of fiberglass reinforced polyphenylene sulfide material. The structural strength and toughness of the pump cover 600 can be further ensured, thereby ensuring the reliability of the pump cover 600.

Fig. 1, 3, 8 and 9 show a water pump 1 according to one specific example of the present invention. As shown in fig. 1, 3, 8 and 9, the water pump 1 further includes an impeller 700, and the impeller 700 includes a first plate 710, a second plate 720 and blades 730. The first plate body 710 is provided with an impeller water inlet 701. The second plate 720 is connected to the rotor 300, and the second plate 720 is spaced apart from the first plate 710 to form the water gap 702. The blades 730 are disposed in the water gap 702 and are spaced apart along the circumference of the first plate 710. After water flow enters the water passing gap 702 from the impeller water inlet 701, the impeller 700 is driven by the rotor 300 to rotate, and water in the water passing gap 702 flows in a direction far away from the center of the impeller 700 through stirring of the blades 730 under the rotation of the impeller 700, so that the water flow is driven.

Specifically, as shown in fig. 1, 3 and 8, the rotor 300 includes a rotor body 310 and a rotor magnet 320. The rotor main body 310 is integrally formed with the second plate 720. The rotor magnet 320 is embedded and injection-molded with the rotor body 310, and the rotor magnet 320 is sleeved outside the rotor body 310. Specifically, the rotor body 310 is cylindrical and includes a portion located above the rotor magnet 320 and a portion extending into the rotor magnet 320, and the rotor magnet 320 is sleeved outside the rotor body 310 in a sleeve shape. Therefore, the assembly process of the water pump 1 can be further simplified, and the assembly efficiency and the integration level of the water pump 1 are improved.

More specifically, as shown in fig. 8, 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. Therefore, the structure of the impeller 700 is more reasonable, the water flow resistance of the impeller 700 is reduced, the noise and vibration when the impeller 700 rotates are reduced, and the power consumption of the water pump is reduced.

Specifically, the ratio of the distance b between the first plate 710 and the second plate 720 to the sum of the dimensional heights of the rotor body 310 and the rotor magnet 320 is 0.05-0.15. This may facilitate control of the overall height of the rotor 300 and the impeller 700, and control of the overall size of the water pump 1.

Advantageously, as shown in fig. 8, the blade 730 is integrally formed on the first plate body 710. This can simplify the assembly process of the impeller 700, reduce the number of parts of the impeller 700, and improve the production efficiency of the impeller 700.

More advantageously, as shown in fig. 8, the second plate 720 is provided with a groove in which the lower end of the vane 730 is fitted. Thus, the blade 730 can be positioned by the groove, which facilitates the stability of the blade 730 and the connection between the first plate 710 and the second plate 720.

Further, the blade 730 is coupled to the second plate body 720 by laser welding. Therefore, the connection strength between the first plate body 710 and the second plate body 720 can be ensured, the sealing performance between the lower end of the blade 730 and the second plate body 720 can be ensured, and the driving effect of the impeller 700 on water flow can be ensured.

Alternatively, as shown in fig. 8, 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 further rational sizing of the impeller 700.

Fig. 9 shows a water pump 1 according to a specific example of the present invention. As shown in fig. 9, the diameter D1 of the impeller water inlet 701 is 8-22 mm. Therefore, the size of the impeller water inlet 701 can be more reasonable, and the water inlet amount is ensured.

Specifically, as shown in FIG. 9, the radius R3 of an imaginary circle tangent to the inner ends of the plurality of vanes 730 is 8-12 millimeters. Therefore, the arrangement of the blades 730 is more reasonable, and the driving effect of the impeller 700 on water flow is ensured.

More specifically, as shown in FIG. 9, blade 730 is arcuate and has first and second opposing

arcs

731, 732, 731 on the convex side of the arc of

blade

730, 732 on the concave side of the arc of

blade

730, 731 having a radius R1 of 10-36 mm and 732 having a radius R2 of 5-25 mm. Therefore, the structure of the blade 730 is more reasonable, the water flow resistance of the blade 730 is reduced, and the driving effect of the impeller 700 on water flow is ensured.

Advantageously, as shown in fig. 9, the first arc 731 is connected to the inner end surface and the outer end surface of the blade 730, respectively, the inner end of the second arc 732 is connected to the inner end surface of the blade 730, the outer end of the second arc 732 is connected to the outer end surface of the blade 730 through an inclined surface 733, the inclined surface 733 extends obliquely outward from the second arc 732 to the first arc 731, and the minimum angle c1 between the inclined surface 733 and the radial direction of the impeller 700 is 0-25 degrees. Therefore, the structure of the blade 730 is more reasonable, the water flow resistance of the blade 730 is reduced, and the driving effect of the blade 730 on water flow is further ensured.

Alternatively, as shown in fig. 9, an angle c2 between an imaginary connection line between the center of the first arc 731 of each blade 730 and the center of the first plate 710 and an imaginary connection line between the inner end of the first arc 731 of the blade 730 and the center of the first plate 710 is 40 to 95 degrees, and an angle c3 between an imaginary connection line between the center of the second arc 732 of each blade 730 and the center of the first plate 710 and an imaginary connection line between the inner end of the first arc 731 of the blade 730 and the center of the first plate 710 is 45 to 75 degrees. Therefore, the arrangement of the blades 730 is more reasonable, the water flow resistance of the blades 730 is reduced, and the driving effect of the impeller 700 on water flow is ensured.

Specifically, as shown in fig. 1 to 3, the seal rings 930 are provided between the pump cover 600 and the shield 100, between the pump cover 600 and the impeller 700, and outside the water outlet joint 630. This ensures the sealing of the water pump 1. As shown in fig. 1 and 3, spacers 940 are provided between the rotor 300 and the shield 100 and between the rotor 300 and the pump cover 600. The gasket 940 may be a ceramic gasket. Thus, smooth rotation of the rotor 300 can be ensured, frictional resistance is reduced, and the rotational stability of the rotor 300 is improved.

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

According to the water heater of the embodiment of the invention, by using the water pump 1 of the embodiment of the invention, the water heater has the advantages of strong reliability and the like.

Other constructions and operations of water heaters according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the 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, comprising:

the end face of the shielding sleeve is provided with a rotor slot and a stator slot, and the stator slot is positioned outside the rotor slot in the radial direction of the shielding sleeve;

a stator fitted within the stator slot;

a rotor rotatably disposed within the rotor slot;

the heat dissipation base shell is arranged on the shielding sleeve, and a heat dissipation cavity is formed in the heat dissipation base shell;

and the circuit board is arranged in the heat dissipation cavity and is electrically connected with the stator.

2. The water pump of claim 1, wherein the heat-dissipating base housing is mounted on a lower end surface of the shield sleeve, the stator groove is formed on a lower end surface of the shield sleeve, the rotor groove is formed on an upper end surface of the shield sleeve, and the heat-dissipating chamber communicates with the stator groove.

3. The water pump of claim 1, wherein the circuit board is adjacent to a bottom wall of the heat sink base housing.

4. The water pump of claim 1, further comprising a bracket mounted below the heat sink base housing, the bracket adapted to be mounted on a water heater.

5. The water pump of claim 4, wherein the heat-dissipating base housing is provided with a mounting hole, the shield sleeve is provided with a shield sleeve through hole, the shield sleeve is connected with the heat-dissipating base housing through a first bolt which penetrates through the shield sleeve through hole and is fitted in the mounting hole, the bracket is provided with a bracket through hole, and the bracket is connected with the heat-dissipating base housing through a second bolt which penetrates through the bracket through hole and is fitted in the mounting hole.

6. The water pump of claim 5, wherein the bracket includes a central portion, a plurality of first lugs and a plurality of second lugs, the plurality of first lugs are spaced circumferentially along the central portion, the plurality of second lugs are spaced circumferentially along the central portion, the bracket through-holes are formed in the first lugs, the second lugs include shock absorbing sections extending obliquely downward and outward from the central portion and mounting sections connected to the shock absorbing sections, the mounting sections are provided with mounting through-holes, and the bracket is adapted to be mounted on the water heater by third bolts passing through the mounting through-holes.

7. The water pump of claim 6, wherein the bracket is machined from the same sheet material.

8. The water pump of claim 4, wherein a shock absorbing shield is sandwiched between the bracket and the heat sink base housing.

9. The water pump of claim 5, further comprising a pump cover mounted to an upper end surface of the shield.

10. The water pump of claim 9, wherein the pump cover has a pump cover through hole, and the first bolt passes through the pump cover through hole and the shield sleeve through hole and fits in the mounting hole to connect the pump cover, the shield sleeve, and the heat-dissipating base casing.

11. The water pump of claim 9, wherein the projection of the bracket on the horizontal plane is located within a circumscribed circle of the projection of the heat-dissipating base shell on the horizontal plane and the shielding sleeve is located within a circumscribed circle of the projection of the shield sleeve on the horizontal plane and the pump cover is located within a circumscribed circle of the projection of the pump cover on the horizontal plane.

12. The water pump of claim 1, wherein the heat-dissipating base housing is an aluminum base housing.

13. The water pump of claim 1, further comprising an impeller, the impeller comprising:

the first plate body is provided with an impeller water inlet;

the second plate body is connected with the rotor, and the second plate body and the first plate body are spaced to form a water passing gap;

the blades are arranged in the water passing gap and are arranged along the circumferential direction of the first plate body at intervals.

14. The water pump of claim 13, wherein the rotor comprises:

a rotor body integrally formed with the second plate body;

and the rotor magnet and the rotor body are integrally formed in an injection molding mode.

15. The water pump of claim 14, wherein a ratio of a distance between the first plate and the second plate to a sum of dimensional heights of the rotor body and the rotor magnet is 0.05-0.15.

16. A water heater comprising a water pump according to any one of claims 1-15.