Irregular Vapor Chamber Wick Paths for Narrow-Section Fluid Flow
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Solution Overview
Problem
In vapor chambers with irregular shapes, the reduced cross-sectional area of the wick structure in certain portions restricts the flow of cooling fluid, inhibiting circulation and affecting heat dissipation efficiency, particularly when the heat source is positioned above these areas.
Innovation Solution
The implementation of multiple longitudinally extending wick structures with varying lengths and configurations, including straight and bent designs, within the vapor chamber to enhance fluid circulation, especially against gravity, by optimizing the flow path and reducing the distance cooling fluid needs to travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vapor chamber has an irregular shape with reduced dimensions in certain portions, then the vapor chamber can be adapted to compact electronic device layouts, but the cross-sectional area of the wick structure is reduced which restricts cooling fluid flow and inhibits circulation
Solution Approach 1:
The wick structure is designed with varying cross-sectional areas that correspond to different portions of the vapor chamber. In portions where the vapor chamber has reduced dimensions, the wick structure also has reduced cross-sectional area. This local adaptation allows the wick structure to fit the irregular shape of the vapor chamber while maintaining appropriate flow capacity in each region, resolving the contradiction between adaptability to compact layouts and cooling fluid circulation efficiency.
2Adaptability or versatility
If the cooling fluid must circulate against gravity in a vertically orientated vapor chamber, then the vapor chamber can be positioned with heat source above, but the flow of cooling fluid stagnates in reduced dimension portions
Solution Approach 1:
The wick structure is configured with different cross-sectional areas in different portions to facilitate upward flow against gravity. In portions where vertical circulation is required, the wick structure maintains sufficient cross-sectional area to prevent stagnation, enabling the vapor chamber to operate in vertical orientation with heat source above without compromising cooling fluid circulation.
3Volume of moving object
If the cross-sectional area of the wick structure is reduced in certain portions, then the vapor chamber can accommodate nearby electrical components, but the flow path becomes restricted and circulation is inhibited
Solution Approach 1:
The wick structure's cross-sectional area is locally optimized for each portion of the vapor chamber. In portions where space for electrical components is required, the wick structure has reduced cross-sectional area that still maintains sufficient flow capacity. This local quality approach allows the vapor chamber to accommodate nearby electrical components while preventing flow restriction and circulation inhibition.
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 enhanced wick structure configurations improve heat dissipation efficiency by facilitating better fluid circulation, ensuring effective heat transfer even in areas with reduced cross-sectional areas, thereby optimizing the performance of vapor chambers in compact electronic devices.
Implementation Method 1
The wick structure is disposed in the chamber. The casing has an evaporation section for absorbing heat and a condensation section for dissipating heat. The cooling fluid is evaporated into a gaseous state in the evaporation section, and then turns into a liquid state in the condensation section and is carried back to the section area by the wick structure
Implementation Method 2
The cooling fluid is evaporated into a gaseous state in the evaporation section
Implementation Method 3
the cooling fluid turns into a liquid state in the condensation section
Data Source
AI summary
A heat dissipation device includes a first casing and a second casing coupled to the first casing. The second casing includes a body having an inner surface and an outer surface opposite the inner surface, and a first portion and a second portion, each of the first and second portions having a different cross-sectional area. The heat dissipation device further includes a plurality of columns on the inner surface, and a first wick structure disposed on the inner surface and in the first portion and the second portion.