Heat Diffuser Coating for Aluminum Water Cooling
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Solution Overview
Problem
Heat diffusers that use water as the operating fluid and aluminum for weight reduction face corrosion issues due to oxide coating formation, leading to reduced cooling performance due to hydrogen gas production, which complicates achieving both weight reduction and improved cooling efficiency.
Innovation Solution
A heat diffuser design featuring a metal housing compartment with a coating layer made of resin, plated metal, or glass containing specific polymers or silicon dioxide to prevent aluminum corrosion, allowing water to be used as the operating fluid without hydrogen gas production, thus maintaining cooling efficiency while reducing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If aluminum is used for the housing compartment to reduce weight, then weight is reduced, but corrosion occurs due to oxide coating formation when water is used as operating fluid
Solution Approach 1:
A coating layer is introduced as an intermediary between the aluminum housing compartment and water operating fluid. This coating layer prevents direct contact between aluminum and water, eliminating the corrosion reaction while allowing the lightweight aluminum structure to maintain its cooling function effectively.
Solution Approach 2:
The heat diffuser employs a composite structure combining aluminum base material with a protective coating layer. This composite approach leverages the high thermal conductivity and low density of aluminum while the coating layer provides corrosion resistance, achieving both weight reduction and reliability.
2Power
If water is used as operating fluid to improve cooling efficiency, then cooling performance is enhanced, but hydrogen gas is produced through corrosion
Solution Approach 1:
The coating layer serves as a protective intermediary that allows water to be used as operating fluid for high cooling efficiency while preventing the electrochemical corrosion reaction that would otherwise produce harmful hydrogen gas.
Solution Approach 2:
The coating layer transforms the potentially harmful interaction between water and aluminum into a beneficial configuration where water's high latent heat of vaporization can be fully utilized for cooling without the side effect of hydrogen gas generation through corrosion.
3Reliability
If thin oxide coating is formed on aluminum surface to prevent corrosion, then corrosion resistance is improved, but microscopic holes are created triggering further corrosion
Solution Approach 1:
Instead of relying on a thin oxide coating that develops microscopic holes and fails, a more robust coating layer is applied that provides continuous, durable protection without forming penetrative defects, ensuring long-term corrosion resistance.
Solution Approach 2:
The solution replaces the inadequate thin oxide coating with a composite protective coating layer that combines corrosion resistance with structural integrity, eliminating the microscopic hole formation problem while maintaining protection.
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 solution effectively suppresses corrosion and hydrogen gas production, enabling a heat diffuser that achieves both weight reduction and enhanced cooling performance, ensuring reliable operation of light source apparatuses and projectors.
Implementation Method 1
The heat from the heat receiver vaporizes the operating fluid in a liquid form
Implementation Method 2
the heat dissipation performed by the heat dissipater condenses the operating fluid
Implementation Method 3
A heat diffuser design featuring a metal housing compartment with a coating layer made of resin, plated metal, or glass containing specific polymers or silicon dioxide to prevent aluminum corrosion
Data Source
AI summary
A heat diffuser according to an aspect of the present disclosure includes a body section including a heat receiver that receives heat from a heat source, a heat dissipater that dissipates the heat received by the heat receiver, and a housing compartment that houses and seals an operating fluid. The operating fluid is water. The housing compartment is made of a metal material having specific gravity smaller than that of copper. The inner surface of the housing compartment is covered with a coating layer. The coating layer is a resin coat containing any of alkyd resin, silicone resin, ethylene-chlorotrifluoroethylene copolymer resin, and tetrafluoroethylene-perfluoro alkyl vinyl ether copolymer resin. The heat from the heat receiver vaporizes the operating fluid in the liquid form, and the heat dissipation performed by the heat dissipater condenses the operating fluid.