Stator assembly of electronic water pump

Abstract

The invention discloses a stator assembly of an electronic water pump. The stator assembly comprises a casing and a stator component, the casing is a plastic casing, the plastic casing wraps the stator component, a rotor assembly mounting cavity is further formed in the casing, and a mandrel for mounting a water pump impeller is embedded into the bottom in the rotor assembly mounting cavity; a lower flange part matched with an upper cover of the electronic water pump is also arranged at the upper end of the plastic casing, and the lower flange part is positioned on the periphery of an upper opening of the rotor assembly mounting cavity; and a heat dissipation plate is installed below the casing, and a fluid heat dissipation cavity communicating with the rotor assembly mounting cavity is formed between the heat dissipation plate and the cavity bottom of the rotor assembly mounting cavity. The cooling liquid flows through the heat dissipation plate through the fluid heat dissipation cavity and takes away heat on the heat dissipation plate, so that cooling of the stator assembly and a circuit board is achieved, the heat dissipation efficiency is high, and conditions are provided for manufacturing a high-power water pump.

Description

technical field [0001] The invention belongs to the technical field of electronic water pumps, and in particular relates to a stator assembly of an electronic water pump. Background technique [0002] At this stage, the heat dissipation of the electronic water pump casing and the circuit board on it is: through the cooling fins installed on the casing and the flow of gas to achieve cooling, because the electronic water pump is installed in the engine compartment and the engine compartment The ambient temperature is high, which leads to low heat dissipation efficiency of the water pump during work. At the same time, because the circuit board itself has a temperature protection function, when the temperature exceeds a certain temperature, the water pump will stop working, and there is a great safety hazard in the driving of the vehicle. In addition, Limited by the above problems, it is impossible to make high-power (100W and above) water pumps. Contents of the invention [...

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Problems solved by technology

[0002] At this stage, the heat dissipation of the electronic water pump casing and the circuit board on it is: through the cooling fins installed on the casing and the flow of gas to achieve cooling, because the electronic water pump is installed in the engine compartment and the engine compartment The ambient temperature is high, which leads to low heat dissipation efficiency of the water pump during work. At the same time, because the circuit board itself has a temperature protection function, when the temperature exceeds a certain temperature, the water pump will stop working, and there is a great safety hazard in the driving of the vehicle. In addition, Due to the above problems, it is not possible to make high-power (100W and above) water pumps

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