Liquid-Cooled Jacket Columnar Support Heat Leakage Reduction
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Solution Overview
Problem
Conventional liquid-cooled jackets face issues with heat leakage through screws and grooves, leading to increased size and reduced deformation resistance, as well as limitations in cooling efficiency due to air cooling systems.
Innovation Solution
A method of manufacturing a liquid-cooled jacket involving a jacket body with a columnar support and a sealing body joined by frictional stirring, where the columnar support is designed to reduce heat leakage and increase deformation resistance by allowing heat transport fluid to contact its outer peripheral surface, thereby enhancing thermal conductivity and reducing the jacket's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grooves are formed in the jacket body to fix the heat-generating element, then the heat-generating element can be securely mounted, but heat leaks through the grooves and screws to the wall part, causing the jacket to increase in size
Solution Approach 1:
The invention extracts the heat-generating element mounting function from the jacket body wall by introducing a separate columnar support structure. The columnar support is inserted into the heat-generating element's through-hole and extends into the cooling fluid passage, allowing the element to be mounted without forming grooves in the jacket body wall, thereby preventing heat leakage paths while maintaining secure mounting.
Solution Approach 2:
The invention segments the mounting function from the cooling structure by using a separate columnar support component. This columnar support handles both the mechanical mounting of the heat-generating element and serves as a thermal conduction path, separating these functions from the jacket body wall and eliminating the need for heat-conductive grooves in the wall.
2Reliability
If a conventional liquid-cooled jacket structure is used, then the jacket can cool the heat-generating element, but the middle part of the sealing body is not supported, leading to reduced deformation resistance
Solution Approach 1:
Instead of having the sealing body rest on the jacket body wall as in conventional designs, the invention inverts the support relationship by having the columnar support extend upward to support the sealing body from below. The columnar support's upper end contacts the lower surface of the sealing body, providing structural support where it is most needed while maintaining the cooling function.
3Device complexity
If air cooling is used to cool heat-generating elements, then the system is simple, but cooling limits are reached and noises are generated
Solution Approach 1:
The invention transitions from air cooling to liquid cooling by introducing a cooling fluid passage that flows through the columnar support. The cooling fluid (liquid) directly contacts the columnar support which is thermally coupled to the heat-generating element, providing superior heat transfer efficiency compared to air cooling while eliminating fan-related noises.
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
The method effectively prevents heat leakage and increases deformation resistance while reducing the size of the liquid-cooled jacket, improving thermal conductivity and cooling efficiency.
Implementation Method 1
heat leak arises in which heat of the heat-generating element H is transferred through the screws M and the grooves 311 to a wall part 312 of the jacket body 310
Implementation Method 2
the jacket body and the sealing body is joined together by frictional stirring
Data Source
AI summary
A method of manufacturing a liquid-cooled jacket, includes: a placing step for placing a sealing body on a jacket body; a first primary joining step for performing frictional stirring by moving a primary joining rotary tool along a first abutment portion where a step side surface of a peripheral wall stepped portion and an outer peripheral side surface of the sealing body abut on each other; and a second primary joining step for performing frictional stirring by moving the primary joining rotary tool along second abutment portions in each of which a step side surface of a columnar support stepped portion and a hole wall of a hole abut on each other.