Electronic Water Pump Cooling Unit Heat Dissipation
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Solution Overview
Problem
Existing electronic water pumps for vehicles face challenges in maintaining appropriate temperatures for stators and control boards due to high-temperature heat, leading to potential deterioration and inefficient engine performance, while also presenting complexities in assembly and installation.
Innovation Solution
An electronic water pump with a cooling unit that transfers heat from an upper cooling plate to a lower cooling plate through cooling pins, integrated with a rotor featuring a permanent magnet and vanes, and O-rings for sealing, facilitating efficient heat dissipation and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a separate cooling water path is formed between the housing and motor casing to maximize heat dissipation, then heat dissipation performance is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the housing and motor casing into a single integrated structure that serves both as a mechanical housing and as a heat dissipation pathway. The housing directly contacts the motor casing, creating an integrated thermal management system that eliminates the need for separate cooling water paths while maintaining effective heat dissipation from the stator and control board.
2Temperature
If cooling water flow path is designed through motor casing, then heat dissipation is improved, but cooling water flow smoothness deteriorates causing stagnation
Solution Approach 1:
The patent applies local quality by creating specific contact surfaces and thermal pathways at critical heat generation points (stator and control board areas) rather than attempting to channel cooling water through the entire motor casing. The housing is designed with enhanced thermal contact properties at these specific locations, allowing effective heat dissipation without disrupting the overall smooth flow of cooling water through the pump system.
3Productivity
If electronic water pump is used to enable variable control and simplify engine structure, then fuel efficiency is improved, but heat dissipation capability deteriorates due to high operating temperature
Solution Approach 1:
The patent implements self-service thermal management where the electronic water pump's own housing and motor casing structure is utilized as the heat dissipation pathway. The housing, which is already part of the pump assembly, directly contacts the motor casing and serves dual functions: providing mechanical housing and acting as a thermal conduction path for heat generated by the stator and control board, eliminating the need for additional cooling components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration maintains stator and control board temperatures within safe limits, enhances engine efficiency, ensures superior torque performance, and simplifies the assembly and installation of the cooling unit, while preventing cooling water from entering sensitive components.
Implementation Method 1
heat of cooling water which circulates through a pump casing is conducted from an upper cooling plate that makes direct contact with the cooling water to a lower cooling plate through a plurality of cooling pins
Implementation Method 2
heat of cooling water which circulates through a pump casing is conducted from an upper cooling plate that makes direct contact with the cooling water
Data Source
AI summary
Disclosed herein is an electronic water pump for vehicles. The electronic water pump includes an inner motor casing (150), a rotor (160) and a cooling unit (170). A shaft (152) is installed in an insert hole (151) of the inner motor casing, and a stator (140) is fitted over the inner motor casing. The inner motor casing has a depression (153) and at least one through hole (156). The rotor is disposed in the insert hole (151) so as to be rotatable around the shaft (152). A permanent magnet (162) is provided in the rotor. The cooling unit includes an upper cooling plate which is fitted over the rotor and is seated into the depression, at least one cooling pin which is coupled to the upper cooling plate and inserted into the through hole, and a lower cooling plate which is coupled to a lower end of the cooling pin.