Spot-Welded Vapor Chamber Wick for Stable Fluid Circulation
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Solution Overview
Problem
Vapor chambers with wick structures face issues of positional deviation during installation, leading to inadequate circulation of liquid-phase working fluid and reduced heat transfer efficiency, especially in larger areas, and the use of joining materials like brazing or solder compromises the capillary force of the wick structure.
Innovation Solution
A vapor chamber design where the wick structure is welded to the container using spot welding techniques such as resistance or laser spot welding, forming welded portions that maintain contact while preventing the entry of joining materials into the capillary structure, ensuring stable fixation and enhanced capillary force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the wick structure is joined to the container with a joining material such as brazing material or solder, then the fixing stability of the wick structure is improved, but the capillary force of the wick structure is reduced
Solution Approach 1:
The harmful joining material is extracted and removed from the system. Instead of using brazing material or solder to join the wick structure to the container, the patent utilizes the container wall itself as the joining surface through direct contact and capillary action, eliminating the need for additional joining materials that would compromise capillary force.
Solution Approach 2:
The container wall acts as an intermediary between the wick structure and the external environment. The wick structure is positioned to contact the container wall directly, allowing the container wall to serve as both the structural boundary and the joining surface, eliminating the need for separate joining materials.
2Device complexity
If the wick structure is held between the upper plate and the lower plate of the container, then the device complexity is reduced, but the positional deviation of the wick structure increases
Solution Approach 1:
The functions of the container wall and the joining surface are merged into a single structure. The container wall itself serves as both the boundary enclosure and the surface to which the wick structure is attached, eliminating the need for separate upper and lower plates to hold the wick structure in place.
Solution Approach 2:
The container wall performs multiple functions simultaneously: it serves as the boundary of the vapor chamber, provides structural support, and acts as the joining surface for the wick structure. This multi-functionality reduces the need for additional components while ensuring proper positioning.
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 provides improved fixing stability and capillary force of the wick structure, preventing positional deviation and ensuring effective circulation of the liquid-phase working fluid, thereby enhancing the heat transfer and cooling properties of the vapor chamber.
Implementation Method 1
excellent capillary force of the wick structure provides excellent flowability for a liquid-phase working fluid
Implementation Method 2
the wick structure is welded to the container so that a welded portion is formed in the wick structure
Implementation Method 3
a vaporization portion and a condensation portion, which is located away from the vaporization portion in a direction toward the heat receiving portion
Data Source
AI summary
The disclosure provides a vapor chamber that has excellent fixing stability of a wick structure inside a container and also has excellent circulation properties for a liquid-phase working fluid due to excellent capillary force of the wick structure. The vapor chamber includes a container in which a cavity portion is formed by one plate-shaped body and another plate-shaped body facing the one plate-shaped body, a working fluid enclosed in the cavity portion, and a wick structure contained in the cavity portion and welded to the container so that a welded portion is formed in the wick structure.