CN216343046U

CN216343046U - Water pump rear cover with heat dissipation function and water pump using same

Info

Publication number: CN216343046U
Application number: CN202122552808.9U
Authority: CN
Inventors: 杨云峰; 王程亮
Original assignee: Dongguan Shenpeng Electronics Co ltd
Current assignee: Guangdong Shenpeng Technology Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-04-19
Anticipated expiration: 2031-10-22

Abstract

The utility model discloses a water pump rear cover with a heat dissipation function and a water pump using the same, and relates to the technical field of water pump parts, wherein the water pump rear cover comprises a rear cover body; the back cover body is recessed towards the inner side, so that a contact part is formed on the inner side of the back cover body, a heat dissipation groove is formed on the outer side of the back cover body, and a plurality of fins are formed in the heat dissipation groove. The utility model mainly solves the problem that the water pump is difficult to radiate the heat of the circuit board and the circuit components thereof; this kind of water pump, lid behind the water pump that has the heat dissipation function, the inboard contact site of back lid body and circuit board contact and can take place the heat exchange with the circuit board, and the inboard contact site of back lid body absorbs the heat from the circuit board, and the heat can be in the fin department in the back lid body outside gives off to air or liquid, can dispel the heat for the circuit board effectively.

Description

Water pump rear cover with heat dissipation function and water pump using same

Technical Field

The utility model relates to the technical field of water pump parts, in particular to a water pump rear cover with a heat dissipation function and a water pump using the same.

Background

The water pump can drive liquid to flow, so that the liquid can flow from one place to another directionally, and the water pump is a mechanical device with wide application.

The motor and the impeller are core parts of the water pump, the impeller is provided with a plurality of blades, the motor of the liquid pump provides rotating power for the impeller, the impeller is in direct contact with liquid, and the rotating impeller can increase pressure for the liquid through the blades so as to drive the liquid to flow.

The motor needs to be driven and controlled by a driver, generally speaking, the driver of the water pump is integrated on a circuit board, and the circuit board is accommodated in a pump shell of the water pump and electrically connected with the motor; a circuit board of the driver is provided with a large number of circuit components such as control chips, power electronic devices, transformers, capacitors and the like, and the circuit components can generate heat; however, in consideration of water resistance, the pump casing of the water pump is of a sealed structure, ventilation is poor, heat dissipation of the circuit board and circuit components of the circuit board is difficult, and the service life of the driver is affected after long-term use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a water pump rear cover with a heat dissipation function, which has the function of dissipating heat for a heat source.

Another object of the present invention is to provide a water pump capable of dissipating heat from a circuit board mounted therein.

In order to achieve the purpose, the utility model provides the following technical scheme: a water pump rear cover with a heat dissipation function comprises a rear cover body; the rear cover body is recessed towards the inner side, so that a contact part is formed on the inner side of the rear cover body, a heat dissipation groove is formed on the outer side of the rear cover body, and a plurality of fins are formed in the heat dissipation groove.

In the above technical solution, the heat dissipation groove extends to the edge of the rear cover body.

In the above technical solution, the extending direction of the fin is the same as the extending direction of the heat sink.

In the above technical solution, the fins and the heat dissipation groove extend together to the edge of the rear cover body.

A water pump comprises a pump body, a front cover, a circuit board, a rotor assembly, a rotating shaft and a stator assembly; a water inlet channel and a water outlet channel are respectively formed on the front cover, and the front cover covers one end of the pump body, so that a cavity is formed in the front cover and the pump body; the rotor assembly is supported in the cavity by the rotating shaft and can rotate around the rotating shaft, the stator assembly surrounds the cavity, and the stator assembly is in magnetic coupling linkage with the rotor assembly to rotate in the cavity; the water pump also comprises the water pump rear cover with the heat dissipation function; the circuit board is accommodated in the pump body and positioned outside the cavity, and the circuit board is electrically connected with the stator assembly; the rear cover body covers the other end of the pump body, and a contact part on the inner side of the rear cover body is in contact with the circuit board and can exchange heat with the circuit board.

In the above technical scheme, a heat conducting medium is arranged between the contact portion and the circuit board.

In the above technical solution, a first rotating shaft joint is further formed on the front cover, and the first rotating shaft joint is supported on the front cover through a bracket; a second rotating shaft connecting seat is formed in the pump body; the first rotating shaft connecting seat and the second rotating shaft connecting seat are opposite to each other, and two ends of the rotating shaft penetrate into the first rotating shaft connecting seat and the second rotating shaft connecting seat respectively.

In the above technical solution, the front cover forms a first water chamber, the first rotating shaft joint is disposed in the first water chamber, and the water inlet channel and the water outlet channel are respectively communicated with the first water chamber; the pump body forms a second water chamber, and the second rotating shaft connecting seat is arranged in the second water chamber; the front cover covers the pump body, so that the first water chamber is communicated with the second water chamber to form the cavity.

In the above technical solution, the stator assembly surrounds the outside of the second water chamber of the pump body; the rotor assembly comprises an impeller and a permanent magnet, the impeller is supported in the cavity by the rotating shaft and can rotate around the rotating shaft, the permanent magnet is embedded in the impeller, and the stator assembly is linked with the impeller to rotate in the cavity through the magnetic coupling of the permanent magnet.

In the above technical solution, the impeller includes an impeller portion and a power portion connected in an axial direction, and the permanent magnet is embedded in the power portion; the impeller part of the impeller is positioned in the first water chamber of the front cover, and the power part of the impeller is positioned in the second water chamber of the pump body.

Compared with the prior art, the utility model has the beneficial effects that:

1. when the water pump rear cover with the heat dissipation function is applied to a water pump, the contact part on the inner side of the rear cover body can be in contact with heat sources such as a circuit board in the water pump, so that the rear cover body can absorb heat from the heat sources, the heat can be dissipated to air or liquid at the fins on the outer side of the rear cover body, the water pump rear cover has the heat dissipation function, and heat can be effectively dissipated from the heat sources such as the circuit board in the water pump;

2. this kind of water pump, lid behind the water pump that has the heat dissipation function, the inboard contact site of back lid body and circuit board contact and can take place the heat exchange with the circuit board, and the inboard contact site of back lid body absorbs the heat from the circuit board, and the heat can be in the fin department in the back lid body outside gives off to air or liquid, can dispel the heat for the circuit board effectively.

Drawings

Fig. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a perspective view of an embodiment of the present invention in another direction.

Fig. 3 is a perspective view of a second embodiment of the present invention.

Fig. 4 is a perspective view of a front cover according to a second embodiment of the present invention.

Fig. 5 is an exploded view of a second embodiment of the present invention.

Fig. 6 is a schematic view of an assembly structure of the rear cover body and the pump body according to the second embodiment of the present invention.

Fig. 7 is a cross-sectional view of a second embodiment of the present invention.

The reference signs are: 1. a rear cover body; 11. a contact portion; 12. a heat sink; 13. a fin; 2. a pump body; 21. a second rotating shaft connecting seat; 22. a second water chamber; 3. a front cover; 31. a water inlet channel; 32. a water outlet channel; 33. a first rotating shaft connecting seat; 34. a support; 35. a first water chamber; 4. a circuit board; 5. a rotor assembly; 51. an impeller; 511. an impeller portion; 512. a power section; 52. a permanent magnet; 53. a bearing; 6. a rotating shaft; 7. a chamber; 8. a stator assembly; 9. a heat transfer medium.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1 and 2, the present embodiment provides a water pump rear cover with a heat dissipation function, which includes a rear cover body 1.

The rear cover body 1 is made of a metal material with good heat conductivity, such as aluminum alloy or stainless steel, and the rear cover body 1 is integrally formed by die-casting or machining.

The rear cover body 1 is recessed towards the inner side, so that a contact part 11 is formed on the inner side of the rear cover body 1, and a heat dissipation groove 12 is formed on the outer side of the rear cover body 1, wherein the contact part 11 is a boss-shaped part on the inner side of the rear cover body 1, and the heat dissipation groove 12 is an inner recessed part on the outer side of the rear cover body 1; a plurality of fins 13 are formed in the heat dissipation groove 12, the fins 13 are integrally formed with the rear cover body 1, the single fin 13 is in a sheet shape, and all the fins 13 are arranged in the heat dissipation groove 12 in parallel and at equal intervals.

Further, the heat dissipation groove 12 extends to the edge of the rear cover body 1, that is, both ends of the heat dissipation groove 12 are open structures, so that air or liquid can flow into the heat dissipation groove 12 from both ends of the heat dissipation groove 12, and the heat at the fins 13 is more easily dissipated into the air or the liquid.

Furthermore, the extending direction of the fins 13 is the same as the extending direction of the heat sink 12, so that air or liquid can flow along the direction of the fins 13 after flowing into the heat sink 12, turbulence is not easy to occur, and the flowing speed of the air or liquid from the fins 13 is improved.

Further, the fins 13 extend to the edge of the rear cover body 1 together with the heat dissipation groove 12, so that the area of the fins 13 is increased, the fins 13 can guide the flow direction of air or liquid at two ends of the heat dissipation groove 12, and the flow rate of the air or liquid flowing through the fins 13 is further increased.

When this kind of lid behind water pump with heat dissipation function is used at the water pump, the inboard contact site 11 of back lid body 1 can contact with heat sources such as circuit board in the water pump, makes back lid body 1 can follow heat source and absorb the heat, and the heat can distribute to air or liquid in the fin 13 department in the back lid body 1 outside, makes the lid behind the water pump have the heat dissipation function, can be effectively for heat source heat dissipation such as circuit board in the water pump.

Example two:

referring to fig. 3-7, the present embodiment provides a water pump, which includes a pump body 2, a front cover 3, a circuit board 4, a rotor assembly 5, a rotating shaft 6, and a stator assembly 8.

Referring to fig. 4, a water inlet channel 31 and a water outlet channel 32 are respectively formed on the front cover 3, in this embodiment, the front cover 3 is an integrally formed half shell, which may be made of engineering plastic material or metal material, the front cover 3 is used to provide a part of a housing for the water pump, and the water inlet channel 31 and the water outlet channel 32 guide the flow of inlet water and outlet water respectively; referring to fig. 5, the pump body 2 is also an integrally formed half-shell made of engineering plastic; the front cover 3 covers one end of the pump body 2, so that a cavity 7 is formed inside the front cover 3 and the pump body 2, and in the embodiment, the front cover 3 and the pump body 2 are fixed with each other through screws; the rotor assembly 5 is supported by the rotating shaft 6 in the cavity 7 and can rotate around the rotating shaft 6, the stator assembly 8 surrounds the cavity 7, and the stator assembly 8 magnetically couples the rotor assembly 5 to rotate in the cavity 7.

The base material of the circuit board 4 is a Printed Circuit Board (PCB), and the driver of the stator assembly 8 is integrated on the circuit board 4, so that the circuit board 4 can drive and control the operation of the stator assembly 8.

Referring to fig. 5 and 6, the water pump further includes a water pump rear cover with a heat dissipation function according to the first embodiment; the circuit board 4 is accommodated in the pump body 2 and located outside the cavity 7, the circuit board 4 is electrically connected with the stator assembly 8, specifically, the circuit board 4 can be fixed in the pump body 2 in a buckling, screw or viscose mode, and the circuit board 4 is electrically connected with the stator assembly 8 through a conducting wire or a conducting column; the rear cover body 1 covers the other end of the pump body 2, the rear cover body 1 seals the end of the pump body 2, and meanwhile, the rear cover body 1 covers the circuit board 4, in the embodiment, the rear cover body 1 and the pump body 2 are fixed with each other through screws; the contact portion 11 inside the rear cover body 1 is in contact with the circuit board 4 and is capable of heat exchange with the circuit board 4, that is, the contact portion 11 is in direct contact with the circuit board 4 and is capable of absorbing heat from the circuit board 4.

Furthermore, a heat-conducting medium 9 is arranged between the contact part 11 and the circuit board 4, so that heat exchange can be performed between the contact part 11 and the circuit board 4 through the heat-conducting medium 9, and reduction of heat exchange efficiency caused by poor contact between the contact part 11 and the circuit board 4 is avoided; the heat-conducting medium 9 is one of heat-conducting silicone grease, a graphite sheet and a flexible metal plate.

Referring to fig. 4, specifically, a first rotation shaft seat 33 is further formed on the front cover 3, and the first rotation shaft seat 33 is supported on the front cover 3 through a bracket 34; furthermore, three brackets 34 are arranged with the central axis of the first rotating shaft connecting seat 33 as the symmetric center; in this embodiment, the first rotating shaft connecting seat 33 and the bracket 34 are integrally formed with the front cover 3; in this embodiment, the first rotation shaft seat 33 is disposed inside the front cover 3 at the end of the water inlet channel 31, that is, the first rotation shaft seat 33 is coaxial with the water inlet channel 31, and the three brackets 34 are disposed around the end edge of the water inlet channel 31; referring to fig. 7, a second shaft seat 21 is formed in the pump body 2; after the front cover 3 and the pump body 2 are fixed to each other, the first rotating shaft connecting seat 33 and the second rotating shaft connecting seat 21 are opposite to each other, and two ends of the rotating shaft 6 penetrate into the first rotating shaft connecting seat 33 and the second rotating shaft connecting seat 21 respectively, so that the rotating shaft 6 is fixed in the cavity 7.

Referring to fig. 5-7, specifically, the front cover 3 forms a first water chamber 35, the first rotating shaft connecting seat 33 is disposed in the first water chamber 35, and the water inlet channel 31 and the water outlet channel 32 are respectively communicated with the first water chamber 35; the pump body 2 forms a second water chamber 22, and the second rotating shaft connecting seat 21 is arranged in the second water chamber 22; the front cover 3 is fitted to the pump body 2, and the first header 35 and the second header 22 communicate with each other to form the chamber 7.

Specifically, the stator assembly 8 is a coil assembly, and after the stator assembly 8 is powered on, a rotating magnetic field can be formed in the space inside the stator assembly; the stator assembly 8 surrounds the outside of the second water chamber 22 of the pump body 2, and the stator assembly 8 is fixed on the pump body 2; the rotor assembly 5 includes an impeller 51 and a permanent magnet 52, the impeller 51 is supported by the rotating shaft 6 in the chamber 7 and can rotate around the rotating shaft 6, the permanent magnet 52 is embedded in the impeller 51, the stator assembly 8 magnetically couples the impeller 51 to rotate in the chamber 7 through the permanent magnet 52, specifically, the permanent magnet 52 rotates under the action of a rotating magnetic field generated by the stator assembly 8, and further, the impeller 51 rotates.

More specifically, the impeller 51 is made of engineering plastics, the impeller 51 comprises an impeller part 511 and a power part 512 which are connected along the axial direction, wherein a plurality of blades are formed on the impeller part 511, the power part 512 is in a shaft shape, the impeller part 511 and the power part 512 are integrally formed to form the impeller 51, the permanent magnet 52 is embedded in the power part 512, specifically, the permanent magnet 52 is sleeved and fixed on the power part 512, the permanent magnet 52 is coated with glue, the glue and the power part 512 are combined into a whole, and the permanent magnet 52 is embedded in the power part 512; impeller portion 511 of impeller 51 is located in first water chamber 35 of front cover 3, and power portion 512 of impeller 51 is located in second water chamber 22 of pump body 2.

Further, a bearing 53 is provided between the impeller 51 and the rotating shaft 6, so that the impeller 51 can rotate on the rotating shaft 6 more smoothly.

When the water pump is used, alternating current is introduced into the stator assembly 8 by the circuit board 4, a rotating magnetic field is formed in the space inside the stator assembly 8, the permanent magnet 52 is magnetically coupled to drive the impeller 51 to rotate in the chamber 7, the rotating impeller part 511 can drive liquid to flow along the blades of the impeller, so that the liquid is sucked into the chamber 7 after passing through the water inlet channel 31, the liquid generates pressure under the drive of the water outlet impeller part 511, and the liquid can flow directionally under the guide of the front cover 3 and is discharged from the water outlet channel 32; in this process, the contact portion 11 inside the rear cover body 1 absorbs heat from the circuit board 4, and the heat can be radiated to the air or the liquid at the fins 13 outside the rear cover body 1, and the heat can be effectively radiated to the circuit board 4.

This kind of water pump, lid behind the water pump that has the heat dissipation function, the inboard contact site 11 of back lid body 1 contacts with circuit board 4 and can take place the heat exchange with circuit board 4, and the inboard contact site 11 of back lid body 1 absorbs the heat from circuit board 4, and the heat can be in the fin 13 department of the back lid body 1 outside gives off to air or liquid, can dispel the heat for circuit board 4 effectively.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A water pump rear cover with a heat dissipation function comprises a rear cover body; it is characterized in that the preparation method is characterized in that,

the rear cover body is recessed towards the inner side, so that a contact part is formed on the inner side of the rear cover body, a heat dissipation groove is formed on the outer side of the rear cover body, and a plurality of fins are formed in the heat dissipation groove.

2. The water pump rear cover with the heat dissipation function according to claim 1, characterized in that: the heat dissipation groove extends to the edge of the rear cover body.

3. The water pump rear cover with the heat dissipation function according to claim 1 or 2, characterized in that: the extending direction of the fins is the same as that of the heat dissipation grooves.

4. The water pump rear cover with the heat dissipation function according to claim 3, characterized in that: the fins and the heat dissipation groove extend to the edge of the rear cover body together.

5. A water pump comprises a pump body, a front cover, a circuit board, a rotor assembly, a rotating shaft and a stator assembly;

a water inlet channel and a water outlet channel are respectively formed on the front cover, and the front cover covers one end of the pump body, so that a cavity is formed in the front cover and the pump body;

the rotor assembly is supported in the cavity by the rotating shaft and can rotate around the rotating shaft, the stator assembly surrounds the cavity, and the stator assembly is in magnetic coupling linkage with the rotor assembly to rotate in the cavity; it is characterized in that the preparation method is characterized in that,

the water pump back cover with the heat dissipation function of any one of claims 1 to 4 is further included;

the circuit board is accommodated in the pump body and positioned outside the cavity, and the circuit board is electrically connected with the stator assembly;

the rear cover body covers the other end of the pump body, and a contact part on the inner side of the rear cover body is in contact with the circuit board and can exchange heat with the circuit board.

6. The water pump of claim 5, wherein: and a heat-conducting medium is arranged between the contact part and the circuit board.

7. The water pump of claim 5, wherein: a first rotating shaft connecting seat is further formed on the front cover and is supported on the front cover through a support;

a second rotating shaft connecting seat is formed in the pump body;

the first rotating shaft connecting seat and the second rotating shaft connecting seat are opposite to each other, and two ends of the rotating shaft penetrate into the first rotating shaft connecting seat and the second rotating shaft connecting seat respectively.

8. The water pump of claim 7, wherein: the front cover forms a first water chamber, the first rotating shaft joint is arranged in the first water chamber, and the water inlet channel and the water outlet channel are respectively communicated with the first water chamber;

the pump body forms a second water chamber, and the second rotating shaft connecting seat is arranged in the second water chamber;

the front cover covers the pump body, so that the first water chamber is communicated with the second water chamber to form the cavity.

9. The water pump of claim 8, wherein: the stator assembly surrounds the outside of the second water chamber of the pump body;

the rotor assembly comprises an impeller and a permanent magnet, the impeller is supported in the cavity by the rotating shaft and can rotate around the rotating shaft, the permanent magnet is embedded in the impeller, and the stator assembly is linked with the impeller to rotate in the cavity through the magnetic coupling of the permanent magnet.

10. The water pump of claim 9, wherein: the impeller comprises an impeller part and a power part which are connected along the axial direction, and the permanent magnet is embedded in the power part;

the impeller part of the impeller is positioned in the first water chamber of the front cover, and the power part of the impeller is positioned in the second water chamber of the pump body.