An electronic water pump dissipating heat through a motor cavity

Abstract

The utility model relates to vehicle-mounted water pump technical field. A kind of electronic water pump of through motor cavity heat dissipation, including water pump shell, the front end of water pump shell is equipped with pump head structure, and pump head structure includes water inlet pipe and water outlet pipe, and water pump shell is equipped with stator structure, rotor structure and PCBA module;Stator structure is integrally plastic in water pump shell, corresponding through hole is set up in stator structure and water pump shell, and rotor structure is equipped with impeller structure for accelerating cooling medium circulation flow.This utility model provides a kind of electronic water pump of through motor cavity heat dissipation, which is convenient for processing and manufacturing, and the cooling and heat dissipation efficiency of water pump is high, can adapt to higher power, more severe high-temperature use environment;Solve the technical problems of low heat dissipation efficiency, uneven cooling, heat concentration, cooling medium cannot fully circulate in conventional water-cooled heat dissipation water pump, flow path does not pass through motor inner cavity, and motor heat dissipation difficulty in prior art.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted water pump technology, and in particular to an electronic water pump that dissipates heat through the motor cavity. Background Technology

[0002] With economic development and the rapid development of the automotive industry, in order to ensure the stable operation of the automotive powertrain, it is necessary to equip it with complete actuators. Therefore, various actuators with motors are widely used in automotive powertrains, including hydraulic actuators, gear shift actuators, brake boosters, etc.

[0003] To ensure engine cooling, a water pump is needed to power the coolant circulation. The water pump itself is powered by an internal motor. With the increasing development of automotive powertrains, the requirements for the water pump's heat dissipation are becoming more and more stringent. Within a limited space, it is necessary to maximize power. However, this increase in power also greatly increases the heat generated by the water pump, especially by the controller and motor module. Increased heat generation leads to decreased water pump efficiency, unstable output performance, and long-term high-temperature operation, which also affects the water pump's lifespan. As a result, it cannot meet higher practical requirements, thus necessitating improvement. Utility Model Content

[0004] This utility model provides an electronic water pump that is easy to process and manufacture, has high cooling and heat dissipation efficiency, can adapt to higher power and more severe high temperature operating environments, and can meet higher practical needs. It solves the technical problems of low heat dissipation efficiency, uneven cooling, and heat concentration in existing vehicle-mounted water pumps, as well as the inability of the cooling medium to circulate fully in conventional water-cooled water pumps, where the flow path does not pass through the motor cavity, making it difficult to dissipate heat from the motor and meet higher practical needs.

[0005] The above-mentioned technical problem of this utility model is solved by the following technical solution: an electronic water pump for heat dissipation through a motor cavity, comprising a water pump housing, a pump head structure at the front end of the water pump housing, the pump head structure including an inlet pipe and an outlet pipe, a stator structure, a rotor structure and a PCBA module inside the water pump housing; the stator structure is integrally encapsulated in the water pump housing, and corresponding through holes are provided on the stator structure and the water pump housing, through which the cooling medium circulates between the heat dissipation area of ​​the motor cavity and the PCBA module; the rotor structure is provided with an impeller structure for accelerating the circulation of the cooling medium; a heat dissipation plate is provided inside the water pump housing for separating the PCBA module from the motor cavity, and the cooling medium can flow over the surface of the heat dissipation plate during the circulation of the cooling medium. During operation, coolant is drawn into the pump head by the impeller structure. A portion of the coolant is pumped to the external system through the outlet pipe, while a small portion enters the motor cavity through the gap between the impeller structure and the pump housing. Under the guidance of the impeller structure, this portion of coolant is accelerated to flow into the motor cavity. Finally, the coolant flows out from the outlet pipe through the through hole. During the circulation of the coolant, the rotor structure, the heat sink of the PCBA module, and the stator structure are all efficiently cooled, achieving rapid cooling.

[0006] Preferably, the through holes are annularly spaced and located between the front end of the pump housing and the gap between the enameled wires of the stator structure. Positioning the holes at the gap between the enameled wires of the stator structure allows for maximum direct contact between the cooling medium and the heat source (enameled wires), significantly improving heat exchange efficiency and ensuring the most effective cooling of the motor's core heat-generating components.

[0007] Preferably, the impeller structure includes a worm-type blade impeller integrally coated with plastic on the rotor structure, which rotates with the rotor structure. The worm-type blade impeller corresponds and cooperates with the inner cavity of the pump head structure to guide the cooling medium. The integrally coated impeller and rotor structure can ensure connection strength and dynamic balance performance, which can improve the stability and life of the water pump operation, optimize flow performance, reduce flow losses, and thus generate greater medium driving force at the same speed, further improving the flow rate and efficiency of the heat dissipation circulation.

[0008] Preferably, the worm gear impeller body has an integrally formed guide groove structure with a "threaded" structure. The continuous "spiral" guide groove structure can generate a more stable and directional axial thrust on the cooling medium, similar to the principle of a screw pump. This effectively prevents the medium from generating eddies or backflow in the circulation path, ensuring the smoothness and efficiency of the flow within the closed loop, thereby bringing a more uniform and reliable heat dissipation effect.

[0009] Preferably, the heat sink is made of metal. A metal heat sink ensures good thermal conductivity and allows for rapid cooling of the PCBA module in conjunction with the cooling medium. This invention uses aluminum as an example for illustration.

[0010] Preferably, the heat sink is integrally formed with several bosses extending into the motor cavity. The bosses on the heat sink increase the contact surface area between the heat sink and the cooling medium, maximizing heat dissipation efficiency without significantly increasing the volume, and ensuring the temperature stability of the PCBA module under high load.

[0011] Preferably, the protruding columns are arranged in a radiating pattern on the surface of the heat sink. The number and position of the protruding columns can be adjusted according to the internal structure of the water pump housing. This invention is illustrated by taking an example where the protruding columns extend outwards in a radiating pattern and are arranged in a circumferential pattern on the surface of the heat sink.

[0012] Therefore, the electronic water pump of this utility model that dissipates heat through the motor cavity has the following advantages: it is easy to process and manufacture, the water pump has high cooling efficiency, it can adapt to higher power and more severe high temperature operating environments, and it can meet higher practical needs. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of an electronic water pump that dissipates heat through the motor cavity according to this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of the front sectional view of the structure.

[0015] Figure 3 yes Figure 1 A three-dimensional structural diagram of the casing of a medium-pressure water pump.

[0016] Figure 4 yes Figure 1 A three-dimensional structural diagram of the middle stator.

[0017] Figure 5 yes Figure 1 A three-dimensional structural diagram of a worm gear impeller.

[0018] Figure 6 yes Figure 5 A schematic diagram of the front sectional view of the structure.

[0019] Figure 7 yes Figure 1 A three-dimensional structural diagram of the heat sink.

[0020] In the figure, the pump housing is 1, the inlet pipe is 2, the outlet pipe is 3, the stator structure is 4, the rotor structure is 5, the PCBA module is 6, the heat sink is 7, the boss column is 8, the through hole is 9, the worm gear impeller is 10, and the guide groove structure is 11. Detailed Implementation

[0021] The technical solution of the utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0022] Example: like Figure 1 and 2 As shown in Figures 3, 4, 5, 6, and 7, an electronic water pump for heat dissipation through a motor cavity includes a water pump housing 1. A pump head structure is installed at the front end of the water pump housing 1. The pump head structure includes a pump head housing, an inlet pipe 2, and an outlet pipe 3.

[0023] The pump housing 1 houses a stator structure 4, a rotor structure 5, and a PCBA module 6; a heat sink 7 is fixedly installed inside the pump housing 1 to separate the PCBA module 6 from the motor cavity.

[0024] The heat sink 7 is made of aluminum. Several protrusions 8 are integrally formed on the heat sink 7 and extend into the motor cavity.

[0025] Several protruding pillars 8 are arranged in a radiating ring on the surface of the heat sink 7.

[0026] The stator structure 4 is integrally encapsulated in the water pump housing 1. Corresponding through holes 9 are provided on the stator structure 4 and the water pump housing 1. The cooling medium circulates between the motor cavity and the heat dissipation area of ​​the PCBA module 6 through the through holes 9.

[0027] The through hole 9 is annularly spaced and opened in the middle of the gap between the front end of the pump housing 1 and the enameled wire of the stator structure 4.

[0028] The rotor structure 5 is equipped with an impeller structure for accelerating the circulation of the cooling medium. The cooling medium circulates between the motor cavity and the heat dissipation area of ​​the PCBA module 6 through the through hole 9, and can flow over the surface of the heat sink 7 during the circulation of the cooling medium.

[0029] The impeller structure includes a worm-type blade impeller 10 integrally encapsulated in plastic outside the rotor structure 5. The worm-type blade impeller 10 rotates with the rotor structure 5. The worm-type blade impeller 10 corresponds to and cooperates with the inner cavity of the pump head structure to guide the cooling medium.

[0030] The worm-type blade impeller 10 has an integrally formed guide groove structure 11 with a "threaded" structure on its main body structure.

[0031] During operation, the coolant is drawn into the pump head by the impeller structure. A portion of the coolant is pumped to the external system through the outlet pipe 3, while a small portion enters the motor cavity through the gap between the impeller structure and the pump housing 1. This portion of coolant is accelerated into the motor cavity by the guide groove structure 11 on the worm impeller 10 body, increasing the flow rate of the cooling and heat dissipation circulation and significantly improving the heat dissipation efficiency.

[0032] Finally, the coolant flows out from the outlet pipe 3 through the through hole 9. During the circulation of the coolant, the heat sink 7 of the rotor structure 5, the PCBA module 6, and the stator structure 4 are all efficiently cooled, achieving rapid cooling.

[0033] The specific embodiments described herein are merely illustrative examples of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. An electronic water pump for heat dissipation through a motor cavity, characterized in that: The system includes a water pump housing, with a pump head structure at the front end of the housing. The pump head structure includes an inlet pipe and an outlet pipe. The water pump housing contains a stator structure, a rotor structure, and a PCBA module. The stator structure is integrally encapsulated within the water pump housing, and corresponding through holes are provided on the stator structure and the water pump housing. Cooling medium circulates between the motor cavity and the heat dissipation area of ​​the PCBA module through these through holes. The rotor structure has an impeller structure for accelerating the circulation of the cooling medium. The water pump housing contains a heat sink plate for separating the PCBA module from the motor cavity, and the cooling medium flows over the surface of the heat sink plate during its circulation.

2. The electronic water pump for heat dissipation through the motor cavity according to claim 1, characterized in that: The through holes are annularly spaced and located between the front end of the pump housing and the enameled wire of the stator structure.

3. The electronic water pump for heat dissipation through the motor cavity according to claim 1, characterized in that: The impeller structure includes a worm-type blade impeller integrally encapsulated in plastic outside the rotor structure, which rotates with the rotor structure; the worm-type blade impeller corresponds to and cooperates with the inner cavity of the pump head structure to guide the cooling medium.

4. An electronic water pump for heat dissipation through the motor cavity according to claim 3, characterized in that: The worm gear impeller body has an integrally formed guide groove structure with a "thread" structure.

5. An electronic water pump for heat dissipation through a motor cavity according to claim 1, characterized in that: The heat sink is made of metal.

6. An electronic water pump for heat dissipation through a motor cavity according to claim 5, characterized in that: The heat sink plate has several protrusions that extend into the motor cavity.

7. An electronic water pump for heat dissipation through a motor cavity according to claim 6, characterized in that: The aforementioned bosses are arranged in a radiating ring on the surface of the heat sink.

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