Vapor Chamber Multilayer Wick Dry-Out Prevention
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Solution Overview
Problem
Existing vapor chambers face challenges in maintaining mechanical strength and preventing dry-out in heat receiving parts, especially when dealing with high heat generation cooling objects, as the heating process for sintered powder wicks can compromise mechanical strength and capillarity.
Innovation Solution
A vapor chamber design featuring a wick structure with a first wick part extending from the heat receiving part to the heat discharge part and a second wick part at the heat receiving part, where the second wick part has a smaller average diameter or aperture dimension than the first wick part, enhancing capillarity and preventing dry-out, without relying on sintered powder for improved mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heating process is performed to sinter powder after the powder is contained in the container, then the capillarity of the wick in the heat receiving part is improved, but the mechanical strength of the container and wick may be lowered due to the thermal effect
Solution Approach 1:
The patent uses a porous sintered body made of heat-resistant material (such as heat-resistant resin or ceramic) as the wick in the heat receiving part. This porous structure provides the necessary capillarity for working fluid circulation while the heat-resistant material maintains mechanical strength even after heating processes, resolving the contradiction between improving capillarity through sintering and maintaining structural integrity.
Solution Approach 2:
The patent employs composite material structures where the sintered body is made of heat-resistant materials that combine porous properties for capillarity with high thermal stability for mechanical strength. This composite approach allows the wick to withstand heating processes while maintaining both capillary function and structural strength.
2Reliability
If the mesh-like member forming the wick is loaded with heat, then the capillarity is improved through sintering, but the mechanical strength of the wick is lowered due to thermal effect
Solution Approach 1:
The wick is constructed as a porous sintered body using heat-resistant materials that inherently maintain mechanical strength after heating. The porous structure is formed through sintering of heat-resistant particles or fibers, creating capillary channels while the material composition ensures thermal stability and preserved mechanical properties.
Solution Approach 2:
The patent changes the material parameters by selecting heat-resistant materials (high melting point, high thermal stability) for the sintered body. This parameter change allows the wick to undergo sintering heating while maintaining mechanical strength, as the material properties are specifically chosen to resist thermal degradation.
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 vapor chamber effectively prevents dry-out and ensures smooth circulation of the working fluid from the heat discharge part to the heat receiving part, maintaining excellent heat transportation properties and mechanical strength, even with high heat generation cooling objects.
Implementation Method 1
a wick structure provided in the cavity, wherein the wick structure includes a first wick part extending from a heat receiving part to a heat discharge part
Implementation Method 2
a working fluid enclosed in the cavity
Data Source
AI summary
The vapor chamber includes a container having a hollow cavity and formed of one plate-shaped member and another plate-shaped member facing the one plate-shaped member that are layered on each other, a working fluid enclosed in the cavity, and a wick structure provided in the cavity. The wick structure includes a first wick part extending from a heat receiving part to a heat discharge part and having a first wick member using a linear member, and a second wick part provided to the heat receiving part and having a second wick member using a linear member. An average diameter the linear member of the second wick member is smaller than an average diameter of the linear member of the first wick member or an aperture dimension of the second wick member is smaller than an aperture dimension of the first wick member.