Vapor Chamber Wick Sheet Segmented Lands Uniform Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vapor chambers face challenges in achieving uniform heat dissipation across a wide region due to limitations in the design of wick structures, which affects the efficiency of heat transfer from heat sources in electronic devices.
Innovation Solution
A wick sheet design featuring a frame with spaced lands, vapor passages, and liquid channels that allow vapor to circulate widely and uniformly, with specific configurations such as angled intersections and branching channels to enhance heat transfer and prevent vapor resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional wick structure is used in the vapor chamber, then the heat dissipation function is provided, but the heat dissipation uniformity across the wide region is insufficient
Solution Approach 1:
The wick structure is segmented into multiple lands (first land, second land, third land, fourth land) spaced apart from each other, creating distinct vapor passages between them. This segmentation allows vapor to flow through multiple separate paths, improving heat dissipation uniformity across the wide region while maintaining adequate coverage area.
Solution Approach 2:
Different regions of the vapor chamber are given different local qualities through the strategic placement of lands and vapor passages. The vapor passages are positioned to ensure uniform vapor distribution in regions requiring better heat dissipation, while lands provide structural support and liquid transport pathways in specific locations.
2Area of stationary object
If the vapor passage is extended to cover a wide region, then the heat dissipation coverage is improved, but the vapor resistance increases
Solution Approach 1:
The vapor passage is divided into multiple shorter segments by introducing spaced lands. Instead of one long continuous passage that would create high resistance, the vapor flows through multiple shorter passages in parallel, reducing overall vapor resistance while maintaining wide region coverage.
Solution Approach 2:
The wick structure transitions from a two-dimensional planar configuration to a three-dimensional arrangement with lands having specific thicknesses and spacing. This dimensional change creates multiple vapor flow paths through the thickness and spacing dimensions, reducing vapor resistance while expanding coverage area.
3Productivity
If the lands are spaced apart to allow vapor circulation, then the heat transfer efficiency is improved, but the liquid channel communication may be insufficient
Solution Approach 1:
The lands are designed with different local qualities: the first land has a liquid channel on its second main body surface side for reliable liquid communication, while other lands are positioned to optimize vapor circulation. This local differentiation ensures both efficient heat transfer and reliable liquid channel communication in critical regions.
Solution Approach 2:
The vapor passages act as intermediaries between the spaced lands, facilitating heat transfer while the liquid channels in specific lands (such as the first land) serve as intermediary pathways for liquid working fluid communication, ensuring both vapor circulation and liquid supply reliability.
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 wick sheet design enables efficient heat transfer and circulation within the vapor chamber, allowing heat to be dissipated uniformly across a wide area, improving the cooling efficiency of electronic devices.
Implementation Method 1
a working fluid in the vapor chamber receives heat from a device at a part proximate to the device (vaporizing portion) to vaporize into vapor (working vapor)
Implementation Method 2
The working vapor diffuses in a direction away from the vaporizing portion in a vapor channel to be cooled and condensed into liquid
Implementation Method 3
A liquid channel serving as a capillary structure (wick) is provided in the vapor chamber. A working fluid (working liquid) condensed into liquid enters the liquid channel from the vapor channel, flows through the liquid channel, and is transferred toward the vaporizing portion
Implementation Method 4
The working vapor diffuses in a direction away from the vaporizing portion in a vapor channel to be cooled and condensed into liquid
Data Source
AI summary
A wick sheet for a vapor chamber includes a first main body surface, second main body surface, frame, and plurality of lands. A vapor passage that extends through from the first main body surface to the second main body surface. The vapor passage through which vapor of a working fluid passes is formed. A liquid channel that communicates with the vapor passage and through which a liquid working fluid passes is formed on the second main body surface side of the lands. An end of the vapor passage in an extension direction is in contact with at least one land, and a first main body surface-side channel that communicates with the vapor passage is formed in a connection region that is on the first main body surface side of the land and in which the end of the vapor passage in the extension direction is in contact with the land.