Heat Sink Metal Net with Variable Hole Sizes for Capillary Flow
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Solution Overview
Problem
Conventional vapor chambers in heat sinks have limited capillary effect due to uniform-sized holes in the capillary structure, which restricts the efficiency of working fluid circulation and cooling performance.
Innovation Solution
A heat sink with a metal net structure featuring holes of at least two different sizes, formed by interlacing first and second metal wires that are woven and deformed to create irregular shapes and varying sizes, enhancing both steam passage and capillary action for improved fluid flow and cooling efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform-sized holes are used in the capillary structure, then the structure is simple to manufacture, but the capillary effect is limited and cooling efficiency is reduced
Solution Approach 1:
The patent applies local quality by creating capillary holes with non-uniform sizes within the same structure. Different hole sizes are distributed in specific regions to optimize both capillary action (smaller holes) and steam passage efficiency (larger holes), thereby improving cooling efficiency while maintaining manufacturing simplicity through a single net structure
Solution Approach 2:
The patent changes the parameter of hole size from uniform to non-uniform distribution. By varying the diameter of capillary holes within the metal net, the system optimizes the balance between capillary pressure (enhanced by smaller holes) and steam passage flow (improved by larger holes), thus resolving the contradiction between manufacturing simplicity and cooling efficiency
2Productivity
If smaller holes are used to enhance capillary action, then capillary effect is improved, but steam passage efficiency is reduced
Solution Approach 1:
The patent implements local quality by spatially distributing different hole sizes within the capillary structure. Smaller holes are positioned in regions where capillary absorption is critical, while larger holes are placed in steam passage regions, allowing each local area to perform its specific function optimally without compromising the other
Solution Approach 2:
The patent segments the hole size distribution into different functional zones within the metal net. This segmentation allows the structure to simultaneously provide areas optimized for capillary action (smaller holes) and areas optimized for steam passage (larger holes), thereby resolving the trade-off between capillary effect and steam passage efficiency
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 heat sink achieves better fluid flow rates and cooling efficacy by utilizing larger holes for steam passage and smaller holes for enhanced capillary action, resulting in improved heat dissipation.
Implementation Method 1
the capillary structure can use the capillary effect to assist in rapid return flow and condensation of the working fluid after evaporation
Implementation Method 2
The working fluid can be heated by the heat source and evaporate
Implementation Method 3
The gaseous working fluid flows to a side remote the heat source and condenses after releasing heat
Data Source
AI summary
A heat sink is used to solve the problem of poor capillary effect of a conventional vapor chamber. The heat sink comprises a casing having a chamber filled with a working fluid. The heat sink further comprises at least one metal net disposed in the chamber. The at least one metal net includes a plurality of first metal wires and a plurality of second metal wires. The plurality of first metal wires and the plurality of second metal wires interlace with each other and are woven to form a plurality of holes. Each of the plurality of holes is surrounded and defined by adjacent first metal wires and adjacent second metal wires. The plurality of holes has at least two different sizes.