CN220956086U

CN220956086U - Water pump with double water outlets

Info

Publication number: CN220956086U
Application number: CN202323058772.4U
Authority: CN
Inventors: 蔡梓豪; 程祖意; 程松; 张娟丽
Original assignee: Guangdong Shenpeng Technology Co ltd
Current assignee: Guangdong Shenpeng Technology Co ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-05-14
Anticipated expiration: 2033-11-13

Abstract

The utility model discloses a water pump with double water outlets, which comprises a pump cover assembly and a water pump body, wherein an impeller which can operate at least at a first rotating speed and a second rotating speed is arranged on the water pump body; when the impeller of the water pump body runs at a first rotation speed, the thrust exerted by the water flow on the water outlet piston is insufficient to overcome the return force exerted by the elastic piece on the water outlet piston, and the water outlet piston stays at a first position so as to open the first water outlet and close the second water outlet; when the impeller of the water pump body runs at the second rotating speed, the thrust exerted by the water flow on the water outlet piston can overcome the return force exerted by the elastic piece on the water outlet piston, and the water outlet piston stays at the second position to close the first water outlet and open the second water outlet. According to the utility model, the rotation speed of the impeller is controlled, and the alternating circulation of the first water outlet and the second water outlet is realized while the water pressure of the water outlet of the water pump is regulated, so that the material cost is saved, the occupied installation space is small, and the water pump is suitable for wide use.

Description

Water pump with double water outlets

Technical Field

The utility model relates to the technical field of water pumps, in particular to a water pump with double water outlets.

Background

The electronic water pump has higher output efficiency and can realize accurate flow control, so that the electronic water pump is widely applied to automobiles, household appliances and industrial equipment, and especially, a new energy automobile is generally provided with two or more electronic water pumps, the electronic water pumps are power sources of the whole cooling system of the new energy automobile, and power batteries, driving motors and the like of the new energy automobile all need to drive cooling liquid to be cooled circularly by means of the electronic water pumps.

In some applications, two water outlet pipes connected to different positions/interfaces are required to be arranged, and the two water outlet pipes have different water pressure requirements, if two water pumps are arranged and are respectively connected with the two water outlet pipes, obviously higher cost can be generated, more installation space is occupied, and at the moment, the arrangement of one water pump and the connection of the two water outlet pipes are preferable.

In the prior art, when one water pump is connected with two water outlet pipes at the same time, if two water outlet pipes need to circulate alternately (no matter whether different water pressure demands exist or not), an electric control valve needs to be arranged between the water pump and the water outlet pipes so as to selectively connect one water outlet pipe and disconnect the other water outlet pipe, and obviously, the material cost of the electric control valve, the occupation of the installation space and the design cost of the control program are also not negligible.

In summary, how to make a single water pump be capable of communicating two water outlet pipes and realize the alternate circulation of the two water outlet pipes according to different water pressure requirements of the two water outlet pipes becomes a problem to be solved urgently.

Disclosure of utility model

The utility model aims to provide a water pump with double water outlets, which can be communicated with two water outlet pipes and realize alternate circulation of the two water outlet pipes according to different water pressure requirements of the two water outlet pipes.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a water pump with double water outlets, comprising a pump cover assembly and a water pump body; the water pump body is provided with an impeller which can at least operate at a first rotating speed and a second rotating speed; the pump cover assembly comprises a pump cover body, an impeller chamber is formed in the pump cover body, and a water inlet and a water outlet which are communicated with the impeller chamber are respectively arranged on the pump cover body; the water outlet chamber of the pump cover body is at least provided with a first water outlet and a second water outlet along the extending direction of the water outlet chamber; an elastic piece and a water outlet piston are arranged in a water outlet chamber of the pump cover body, the water outlet piston can slide in the water outlet chamber and at least stays at a first position and a second position, water flow from the impeller chamber can apply thrust to the water outlet piston, the elastic piece can apply return force to the water outlet piston, and the thrust applied by the water flow to the water outlet piston is opposite to the return force applied by the elastic piece to the water outlet piston; when the impeller of the water pump body runs at a first rotation speed, the thrust exerted by water flow on the water outlet piston is insufficient to overcome the return force exerted by the elastic piece on the water outlet piston, and the water outlet piston stays at a first position to open the first water outlet and close the second water outlet; when the impeller of the water pump body runs at a second rotating speed, the thrust exerted by water flow on the water outlet piston can overcome the return force exerted by the elastic piece on the water outlet piston, and the water outlet piston stays at a second position to seal the first water outlet and open the second water outlet.

In the above technical solution, the water outlet piston is provided with a first water blocking portion, a water outlet channel portion and a second water blocking portion in sequence along its own extending direction; when the water outlet piston stays at the first position, the water outlet channel part and the first water outlet are mutually aligned, and the second water blocking part and the second water outlet are mutually aligned; when the water outlet piston stays at the second position, the water outlet channel part and the second water outlet are mutually aligned, and the first water blocking part and the first water outlet are mutually aligned.

In the above technical solution, the water outlet channel portion is disposed at an outer wall of the water outlet piston and is one of a grid, a mesh, a screen, and an opening.

In the above technical solution, the pump cover assembly further includes a water outlet chamber end cover; the water outlet chamber end cover is covered at the free end of the water outlet chamber of the pump cover body so as to seal the opening of the water outlet chamber; one end of the elastic piece abuts against the water outlet piston, and the other end of the elastic piece abuts against the inner wall of the water outlet chamber end cover.

In the above technical scheme, the inner wall of the water outlet chamber end cover is provided with a fixing column for limiting the elastic piece.

In the above technical scheme, the water pump body comprises a pump shell, a stator assembly, a rotor assembly, a shaft core and the impeller; a first axle core seat is formed in a pump cover body of the pump cover assembly; a rotor chamber is formed in the pump shell, and a second shaft core seat is formed at the bottom of the rotor chamber; the pump cover body of the pump cover assembly is mutually combined and fixed with the pump shell, and the first shaft core seat of the pump cover body and the second shaft core seat of the pump shell are mutually opposite; the two ends of the shaft core are respectively inserted and fixed into a first shaft core seat of the pump cover body and a second shaft core seat of the pump shell, the rotor assembly is sleeved on the shaft core, so that the rotor assembly is supported in a rotor chamber of the pump shell, and the impeller is fixed on the rotor assembly and is positioned in an impeller chamber of the pump cover body; the stator assembly is arranged in the pump shell and surrounds the outside of the rotor chamber, so that the stator assembly can be magnetically coupled to drive the rotor assembly to rotate, and further drive the impeller to rotate.

In the above technical scheme, the rotor assembly comprises a rotor bracket, a magnetic ring and a bearing; the bearing is arranged in the rotor bracket in a penetrating way, and the magnetic ring is sleeved outside the rotor bracket; the impeller is fixed on a rotor support of the rotor assembly, and when the rotor assembly is sleeved on the shaft core, the bearing is matched with the shaft core.

In the technical scheme, the water pump with the double water outlets further comprises a driving circuit board; the drive circuit board is installed in the pump housing and located outside the rotor chamber; the driving circuit board is electrically connected with the stator assembly.

In the technical scheme, the water pump with the double water outlets further comprises a rear end cover; the rear end cover is fixed at one end of the pump shell opposite to the pump cover assembly and shields the driving circuit board.

In the technical scheme, the end faces of the first shaft core seat of the pump cover body and the second shaft core seat of the pump shell are respectively provided with a thrust washer.

Compared with the prior art, the utility model has the beneficial effects that: according to the water pump with the double water outlets, through controlling the rotating speed of the impeller, the water pressure of water discharged by the water pump is regulated, meanwhile, the alternating circulation of the first water outlet and the second water outlet is realized, water flow with lower water pressure is pumped out from the first water outlet, water flow with higher water pressure is pumped out from the second water outlet, different water pressure requirements of the two water outlets can be met, an electric control valve is not needed, in addition, the interlocking of the first water outlet and the second water outlet is realized through the water outlet piston, the water pump with the double water outlets can be communicated with the two water outlets, and according to the different water pressure requirements of the two water outlets, the alternating circulation of the two water outlets is realized, the material cost is saved, the occupied installation space is small, and the water pump with the double water outlets is suitable for being widely used in automobiles, household appliances and industrial equipment.

Drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is an exploded view of the present utility model.

Fig. 3 is a cross-sectional view of the present utility model at the mandrel.

Fig. 4 is one of the sectional views of the present utility model at the outlet chamber.

FIG. 5 is a second cross-sectional view of the present utility model at the outlet chamber.

The reference numerals are: 1. a pump cap assembly; 11. a pump cover body; 111. an impeller chamber; 112. a water inlet; 113. a water outlet chamber; 114. a first water outlet; 115. a second water outlet; 116. a first mandrel base; 12. an elastic member; 13. a water outlet piston; 131. a first water shutoff portion; 132. a water outlet passage portion; 133. a second water shutoff portion; 14. an end cover of the water outlet chamber; 141. a seal ring; 142. fixing the column; 2. a water pump body; 21. a pump housing; 211. a rotor chamber; 212. a second axle core seat; 22. a stator assembly; 23. a rotor assembly; 231. a rotor bracket; 232. a magnetic ring; 233. a bearing; 24. a shaft core; 25. an impeller; 26. a driving circuit board; 27. a rear end cover; 28. thrust washers.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment provides a water pump with double water outlets, which can be at least communicated with two water outlet pipes and realize alternate circulation of the two water outlet pipes according to different water pressure requirements of the two water outlet pipes.

Referring to fig. 1-5, the water pump with dual water outlets of the present embodiment includes a pump cover assembly 1 and a pump body 2.

The water pump body 2 is provided with an impeller 25 which is capable of running at least at a first rotational speed and a second rotational speed, typically in RPM, which may be single values, may take on values in a continuous range, may take on values among some preset discrete values, and in addition, under the same conditions, should be higher than the first rotational speed.

The pump cover assembly 1 comprises a pump cover body 11, the pump cover body 11 is a cover body made of metal or engineering plastic, an impeller chamber 111 is formed in the pump cover body 11, a water inlet 112 and a water outlet chamber 113 which are communicated to the impeller chamber 111 are further respectively arranged on the pump cover body 11, in the embodiment, the water inlet 112 and the water outlet chamber 113 are hard short pipes, the water inlet 112 and the water outlet chamber 113 are uniformly formed on the pump cover body 11, the water inlet 112 is suitable for being connected with a water inlet pipe, and the water outlet chamber 113 has a length and a diameter which are larger than those of the water inlet 112.

The water outlet chamber 113 of the pump cover body 11 is at least provided with a first water outlet 114 and a second water outlet 115 along its own extending direction, in this embodiment, the first water outlet 114 and the second water outlet 115 are water outlet connectors penetrating through the side wall of the water outlet chamber 113, and both are suitable for being connected with a water outlet pipe.

The elastic piece 12 and the water outlet piston 13 are arranged in the water outlet chamber 113 of the pump cover body 11, the water outlet piston 13 can slide in the water outlet chamber 113 and at least stays at the first position and the second position, water flow from the impeller chamber 111 can apply thrust to the water outlet piston 13, the elastic piece 12 can apply return force to the water outlet piston 13, and the thrust applied by the water flow to the water outlet piston 13 is opposite to the return force applied by the elastic piece 12 to the water outlet piston 13.

It should be noted that, the elastic member 12 may be a spring, a spring plate or a flexible rubber-plastic member, and in this embodiment, the elastic member 12 is a tower-shaped spring; the water outlet piston 13 is an engineering plastic workpiece or a metal workpiece integrally formed, the outer contour of which varies according to the internal shape of the water outlet chamber 113, and the outer wall of the water outlet piston 13 should be capable of being tightly attached to the inner wall of the water outlet chamber 113, and in this embodiment, the water outlet piston 13 is a cylindrical workpiece with a hollow interior.

Referring to fig. 4, when the impeller 25 of the water pump body 2 is operated at the first rotation speed, the thrust exerted by the water flow on the water outlet piston 13 is insufficient to overcome the restoring force exerted by the elastic member 12 on the water outlet piston 13, and the water outlet piston 13 stays at the first position to open the first water outlet 114 and close the second water outlet 115.

Referring to fig. 5, when the impeller 25 of the water pump body 2 operates at the second rotation speed, the thrust force exerted by the water flow on the water outlet piston 13 can overcome the return force exerted by the elastic member 12 on the water outlet piston 13, and the water outlet piston 13 stays at the second position to close the first water outlet 114 and open the second water outlet 115.

Specifically, the water outlet piston 13 is provided with a first water blocking portion 131, a water outlet passage portion 132 and a second water blocking portion 133 in this order along its own extending direction, the first water blocking portion 131, the water outlet passage portion 132 and the second water blocking portion 133 being integrally molded; wherein the water outlet channel part 132 is arranged at the outer wall of the water outlet piston 13 and is one of a grid, a mesh, a filter screen and an opening, and the first water blocking part 131 and the second water blocking part 133 are solid walls; in this embodiment, the water outlet channel portion 132 is a grille.

Referring to fig. 4, when the water outlet piston 13 is left at the first position, the water outlet channel 132 and the first water outlet 114 are aligned with each other, and the second water blocking portion 133 and the second water outlet 115 are aligned with each other, so that water can flow through the water outlet channel 132 (grille) at the first water outlet 114, and the second water outlet 115 is blocked by the second water blocking portion 133.

Referring to fig. 5, when the water outlet piston 13 is stopped at the second position, the water outlet channel portion 132 and the second water outlet 115 are aligned with each other, and the first water blocking portion 131 and the first water outlet 114 are aligned with each other, so that water can flow through the water outlet channel portion 132 (grille) at the second water outlet 115, and the first water outlet 114 is blocked by the first water blocking portion 131, in this embodiment, the first water blocking portion 131 completely blocks the entire first water outlet 114.

Further, the pump cover assembly 1 further comprises a water outlet chamber end cover 14, and the water outlet chamber end cover 14 is a cover plate made of engineering plastic or metal; the water outlet chamber end cover 14 covers the free end of the water outlet chamber 113 of the pump cover body 11 to block the opening of the water outlet chamber 113, specifically, the water outlet chamber end cover 14 and the water outlet chamber 113 are locked and fixed by screws, and it can be understood that a sealing ring 141 is arranged between the water outlet chamber end cover 14 and the inner wall of the water outlet chamber 113 to prevent the liquid leakage of the opening of the water outlet chamber 113; one end of the elastic member 12 abuts against the water outlet piston 13, and the other end of the elastic member 12 abuts against the inner wall of the water outlet chamber end cap 14, in such a manner that the elastic member 12 can apply a return force to the water outlet piston 13.

Further, a fixing column 142 for limiting the elastic member 12 is disposed at the inner wall of the outlet chamber end cover 14, specifically, the fixing column 142 is a columnar structure integrally formed with the outlet chamber end cover 14, and the small end of the elastic member 12 is sleeved on the fixing column 142, so that the fixing column 142 can limit the small end of the elastic member 12.

Specifically, the water pump body 2 includes a pump casing 21, a stator assembly 22, a rotor assembly 23, a shaft core 24, and an impeller 25.

The pump casing 21 is an integrally formed half casing, which may be made of engineering plastic or metal, and the pump casing 21 is used for providing a part of a casing for the water pump; the shaft core 24 is a cylindrical shaft made of metal, has rigidity and can allow the bearing to be sleeved in; the stator assembly 22 is a coil assembly, and when a current is applied to the stator assembly 22, a rotating magnetic field can be formed in the space inside the stator assembly.

A first axle core seat 116 is formed in the pump cover body 11 of the pump cover assembly 1, and the first axle core seat 116 is integrally formed with the pump cover body 11 and is supported in the pump cover body 11 through a supporting arm; a rotor chamber 211 is formed in the pump housing 21, and a second shaft core seat 212 is formed at the bottom of the rotor chamber 211, in this embodiment, the end surface in the pump housing 21 is sunk to form the rotor chamber 211, and the second shaft core seat 212 and the pump housing 21 are integrally formed; in practice, both the first mandrel seat 116 and the second mandrel seat 212 are shape-matched to the mandrel 24, capable of allowing one end of the mandrel 24 to be inserted therein; the pump cap body 11 of the pump cap assembly 1 is coupled to and fixed to the pump housing 21 (specifically, fixed to each other by screws), and the first core print 116 of the pump cap body 11 and the second core print 212 of the pump housing 21 are opposed to each other; both ends of the shaft core 24 are respectively inserted and fixed into the first shaft core seat 116 of the pump cover body 11 and the second shaft core seat 212 of the pump shell 21, and the rotor assembly 23 is sleeved on the shaft core 24, so that the rotor assembly 23 is supported in the rotor chamber 211 of the pump shell 21, and at this time, the whole rotor assembly 23 can rotate by taking the shaft core 24 as a rotation shaft under the support of the shaft core 24; the impeller 25 is fixed on the rotor assembly 23 and is positioned in the impeller chamber 111 of the pump cover body 11, in this embodiment, the blades of the impeller 25 are integrally formed with the body of the impeller 25, and the blades on the impeller 25 are fixed on the rotor assembly 23 by ultrasonic welding; the stator assembly 22 is disposed within the pump housing 21 (which is specifically secured by one of adhesive, snap fit, or interference fit) and surrounds the rotor chamber 211 such that the stator assembly 22 can be magnetically coupled to drive the rotor assembly 23 in rotation, which in turn drives the impeller 25 in rotation.

Further specifically, the rotor assembly 23 includes a rotor bracket 231, a magnetic ring 232, and a bearing 233; wherein the rotor support 231 is an integrally injection molded annular support for providing an integral support foundation for the rotor assembly 23; the magnetic ring 232 is a metal ring body with magnetism, and can be magnetically coupled with the stator assembly 22 to drive the rotor assembly 23 to rotate; the bearing 233 is an integrally formed cylindrical workpiece made of graphite/ceramic, and has a self-lubricating function; the bearing 233 is arranged in the rotor bracket 231 in a penetrating way, the magnetic ring 232 is sleeved outside the rotor bracket 231, in practice, the bearing 233 and the magnetic ring 232 are respectively arranged in a die of the rotor bracket 231, the rotor bracket 231 is molded in an in-die injection molding way, and after the rotor bracket 231 is molded, the rotor bracket is combined with the bearing 233 and the magnetic ring 232 into a whole; the impeller 25 is fixed on the rotor support 231 of the rotor assembly 23, in this embodiment, the blades of the impeller 25 are integrally formed with the body of the impeller 25, the blades on the impeller 25 are fixed on the rotor support 231 of the rotor assembly (specifically, the table-shaped structure at the upper end of the rotor support 231) by ultrasonic welding, and when the rotor assembly 23 is sleeved on the shaft core 24, the bearing 233 is mutually matched with the shaft core 24.

Further, the water pump with dual water outlets of the present embodiment further includes a driving circuit board 26, wherein the driving circuit board 26 is a Printed Circuit Board (PCB), on which a main control and stator assembly driving module and necessary peripheral circuits are mounted; the drive circuit board 26 is installed in the pump housing 21 and outside the rotor chamber 211, and may be fixed by screws in particular; the driving circuit board 26 is electrically connected to the stator assembly 22, and in this embodiment, the pins of the stator assembly 22 are directly soldered to the driving circuit board 26.

Further, the water pump with dual water outlets of the present embodiment further includes a rear end cover 27, where the rear end cover 27 is a cover plate made of metal or engineering plastic; the rear end cover 27 is fixed at one end (fixed by a screw or a buckle) of the pump shell 21 relative to the pump cover assembly 1, and shields the driving circuit board 26, so that the driving circuit board 26 and the stator assembly 22 are waterproof and dustproof; it will be appreciated that the drive circuit board 26 is wired out through a through hole in the pump housing 21 or rear end cap 27.

Further, the end surfaces of the first shaft core seat 116 of the pump cover body 11 and the second shaft core seat 212 of the pump casing 21 are respectively provided with a thrust washer 28, the thrust washer 28 is made of wear-resistant metal, and the thrust washer 28 is provided, so that the bearing 233 and the first shaft core seat 116/the second shaft core seat 212 can be prevented from directly rubbing, and the service lives of the bearing 233, the pump casing 21 and the pump cover body 11 can be prolonged.

When the water pump with double water outlets is used, the driving circuit board 26 is electrified and is electrified to the stator assembly 22, so that a rotating magnetic field is formed in the space inside the stator assembly 22, and the whole rotor assembly 23 is driven to rotate in the rotor chamber 211 through magnetic coupling of the magnetic ring 232, so that the impeller 25 is driven to rotate in the impeller chamber 111, and the rotating impeller 25 can drive liquid to flow along the blades of the impeller; when the impeller 25 runs at the first rotation speed, the thrust exerted by the water flow driven by the impeller on the water outlet piston 13 is insufficient to overcome the return force exerted by the elastic piece 12 on the water outlet piston 13, the elastic piece 12 is in an extended state, the water outlet piston 13 stays at the first position, at the moment, the water outlet channel part 132 is mutually aligned with the first water outlet 114, the second water blocking part 133 is mutually aligned with the second water outlet 115, in this way, the first water outlet 114 can be opened and the second water outlet 115 can be closed, the water flow with lower water pressure is pumped out from the first water outlet 114, the second water outlet 115 does not discharge water any more, or the water yield is very small; when the impeller 25 operates at the second rotation speed, the thrust exerted by the water flow driven by the impeller on the water outlet piston 13 can overcome the return force exerted by the elastic member 12 on the water outlet piston 13, the elastic member 12 is in a compressed state, the water outlet piston 13 stays at the second position, at this time, the water outlet channel part 132 and the second water outlet 115 are mutually aligned, and the first water blocking part 131 and the first water outlet 114 are mutually aligned, so that the first water outlet 114 can be closed and the second water outlet 115 can be opened, the water flow with higher water pressure is pumped out from the second water outlet 115, and the first water outlet 114 does not discharge water any more, or the water yield is very small.

The water pump with double water outlets of the embodiment realizes the alternate circulation of the first water outlet 114 and the second water outlet 115 by controlling the rotating speed of the impeller 25 while adjusting the water outlet pressure of the water pump, and the water flow with lower water pressure is pumped out from the first water outlet 114, the water flow with higher water pressure is pumped out from the second water outlet 115, so that different water pressure requirements of the two water outlets can be met, and an electric control valve is not needed.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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. The water pump with the double water outlets is characterized by comprising a pump cover assembly and a water pump body;

The water pump body is provided with an impeller which can at least operate at a first rotating speed and a second rotating speed;

the pump cover assembly comprises a pump cover body, an impeller chamber is formed in the pump cover body, and a water inlet and a water outlet which are communicated with the impeller chamber are respectively arranged on the pump cover body;

The water outlet chamber of the pump cover body is at least provided with a first water outlet and a second water outlet along the extending direction of the water outlet chamber;

An elastic piece and a water outlet piston are arranged in a water outlet chamber of the pump cover body, the water outlet piston can slide in the water outlet chamber and at least stays at a first position and a second position, water flow from the impeller chamber can apply thrust to the water outlet piston, the elastic piece can apply return force to the water outlet piston, and the thrust applied by the water flow to the water outlet piston is opposite to the return force applied by the elastic piece to the water outlet piston;

When the impeller of the water pump body runs at a first rotation speed, the thrust exerted by water flow on the water outlet piston is insufficient to overcome the return force exerted by the elastic piece on the water outlet piston, and the water outlet piston stays at a first position to open the first water outlet and close the second water outlet;

When the impeller of the water pump body runs at a second rotating speed, the thrust exerted by water flow on the water outlet piston can overcome the return force exerted by the elastic piece on the water outlet piston, and the water outlet piston stays at a second position to seal the first water outlet and open the second water outlet.

2. The water pump with dual water outlets of claim 1, wherein: the water outlet piston is sequentially provided with a first water blocking part, a water outlet channel part and a second water blocking part along the self extending direction;

When the water outlet piston stays at the first position, the water outlet channel part and the first water outlet are mutually aligned, and the second water blocking part and the second water outlet are mutually aligned;

When the water outlet piston stays at the second position, the water outlet channel part and the second water outlet are mutually aligned, and the first water blocking part and the first water outlet are mutually aligned.

3. The water pump with dual water outlets according to claim 2, wherein: the water outlet passage portion is provided at an outer wall of the water outlet piston and is one of a grill, a mesh, a screen, and an opening.

4. The water pump with dual water outlets of claim 1, wherein: the pump cover assembly further comprises a water outlet chamber end cover;

The water outlet chamber end cover is covered at the free end of the water outlet chamber of the pump cover body so as to seal the opening of the water outlet chamber;

one end of the elastic piece abuts against the water outlet piston, and the other end of the elastic piece abuts against the inner wall of the water outlet chamber end cover.

5. The water pump with dual water outlets of claim 4, wherein: the inner wall of the water outlet chamber end cover is provided with a fixing column for limiting the elastic piece.

6. The water pump with dual water outlets according to any one of claims 1-5, wherein: the water pump body comprises a pump shell, a stator assembly, a rotor assembly, a shaft core and the impeller;

a first axle core seat is formed in a pump cover body of the pump cover assembly;

A rotor chamber is formed in the pump shell, and a second shaft core seat is formed at the bottom of the rotor chamber;

The pump cover body of the pump cover assembly is mutually combined and fixed with the pump shell, and the first shaft core seat of the pump cover body and the second shaft core seat of the pump shell are mutually opposite;

The two ends of the shaft core are respectively inserted and fixed into a first shaft core seat of the pump cover body and a second shaft core seat of the pump shell, the rotor assembly is sleeved on the shaft core, so that the rotor assembly is supported in a rotor chamber of the pump shell, and the impeller is fixed on the rotor assembly and is positioned in an impeller chamber of the pump cover body;

The stator assembly is arranged in the pump shell and surrounds the outside of the rotor chamber, so that the stator assembly can be magnetically coupled to drive the rotor assembly to rotate, and further drive the impeller to rotate.

7. The water pump with dual water outlets of claim 6, wherein: the rotor assembly comprises a rotor bracket, a magnetic ring and a bearing;

The bearing is arranged in the rotor bracket in a penetrating way, and the magnetic ring is sleeved outside the rotor bracket; the impeller is fixed on a rotor support of the rotor assembly, and when the rotor assembly is sleeved on the shaft core, the bearing is matched with the shaft core.

8. The water pump with dual water outlets of claim 6, wherein: the driving circuit board is also included;

the drive circuit board is installed in the pump housing and located outside the rotor chamber;

the driving circuit board is electrically connected with the stator assembly.

9. The water pump with dual water outlets according to claim 8, wherein: the device also comprises a rear end cover;

the rear end cover is fixed at one end of the pump shell opposite to the pump cover assembly and shields the driving circuit board.

10. The water pump with dual water outlets of claim 6, wherein: and the end surfaces of the first shaft core seat of the pump cover body and the second shaft core seat of the pump shell are respectively provided with a thrust washer.