Heat radiation structure and electronic water pump

Abstract

The invention discloses a heat radiation structure and an electronic water pump. The electronic water pump comprises the heat radiation structure, a pump head and a pump case, wherein a cavity is formed by the pump head, the pump case and the heat radiation structure. An isolation sleeve used for diving the cavity into a dry cavity and a wet cavity is connected between the pump head and the pump case. A rotor assembly is arranged in the wet cavity. A stator assembly and a control panel assembly connected with the stator assembly are arranged in the dry cavity. The control panel assembly comprises a control panel and multiple chips abutting against heat conduction bosses. According to the heat radiation structure and the electronic water pump, heat emitted by the chips is conducted out by the heat conduction bosses, then heat radiation sheets integrally formed with the heat conduction bosses emit heat rapidly, the heat conduction efficiency is increased, heat conduction of the chips ismore rapid, and the heat conduction efficiency of the water pump is greatly improved through a heat conduction cover.

Description

technical field [0001] The invention belongs to the field of water pumps, and in particular relates to a heat dissipation structure and an electronic water pump. Background technique [0002] In recent years, with the rapid development of new energy vehicles such as pure electric vehicles and hybrid vehicles, electronic water pumps have been widely used. As an important part of the automobile cooling system, the electronic water pump mainly functions to cool the engine, turbocharger, battery, drive motor, drive controller, etc. [0003] With the continuous improvement of electric vehicles' requirements for cruising range and reliability, higher requirements are also put forward for the volume, performance and lifespan of auto parts such as electronic water pumps. The electronic water pump integrates the impeller rotor, motor, control board and other components, and the service life of the water pump depends largely on the control board. The control board contains multiple ...

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Problems solved by technology

[0004] The existing automotive electronic water pump control board is installed at the back end of the water pump. The control board mainly adopts natural cooling or local conduction heat dissipation cooling for individual components, resulting in uneven heat dissipation and poor cooling effect; It is fixed on the control board by soldering, lacks an auxiliary support structure, and there is a risk of loosening under long-term vibration conditions; the connection between the control board and the motor, power supply, and signal terminal is generally through a connecting line, and the connection between the connecting line and the control board requires relatively large operations. space, and there is a risk of loosening of the connecting wire under vibration conditions; the impeller and the permanent magnet are mainly connected by injection molding, and the material of the impeller is generally plastic. Since the impeller is a non-magnetic material, the permanent magnet has a large magnetic flux leakage and the motor efficiency is low

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