Heat Sink with Localized Fin Density for Thermal Management
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Solution Overview
Problem
Conventional heat sinks are not optimal for heat exchange when the heat-source area is smaller than the heat sink base, as the number of fins is limited, leading to inefficient heat dissipation due to increased distance for heat travel and reduced temperature difference between the fluid and fins away from the heat-source.
Innovation Solution
A heat sink design with a base member that approximates the heat-source area, featuring a plurality of fins arranged to allow unobstructed horizontal fluid flow and convergence towards the center, enhancing heat transfer and reducing fluid leakage between rows, thereby increasing fin density and surface area near the heat-source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the heat sink base area is significantly higher than the heat-source area, then the heat sink can cover a larger area, but the heat dissipation efficiency decreases due to increased distance for heat travel and reduced temperature difference between fluid and fins away from the heat-source
Solution Approach 1:
The patent applies local quality by concentrating fins directly above the heat-source area with higher density, while reducing fin density or eliminating fins in peripheral areas. This localized fin distribution optimizes heat exchange at the critical heat-source region while avoiding unnecessary fins that would increase heat travel distance and reduce temperature difference in peripheral areas.
2Device complexity
If the number of fins is limited due to smaller heat-source area, then the heat sink structure remains simple, but the heat exchange efficiency is reduced due to increased distance for heat travel
Solution Approach 1:
The patent implements local quality by placing a higher density of fins directly above the heat-source area where heat generation occurs, while reducing or eliminating fins in peripheral areas. This localized approach maximizes heat exchange efficiency at the critical region without unnecessarily increasing overall structural complexity.
3Ease of operation
If fins are arranged with larger spacing to allow fluid flow, then the fluid can flow unobstructed, but the heat exchange surface area is reduced
Solution Approach 1:
The patent applies local quality by implementing different fin spacing configurations in different regions: smaller spacing above the heat-source area to maximize heat exchange surface area where it is most critical, and larger spacing in peripheral areas to maintain adequate fluid flow. This regional differentiation optimizes both heat exchange efficiency and fluid flow characteristics.
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
This design improves heat dissipation by increasing fin density and surface area near the heat-source, guiding more fluid flow over the fins, and maintaining fluid pressure to prevent leakage, resulting in enhanced thermal management for electronic devices.
Implementation Method 1
a base member (10) and a heat radiating portion (20), wherein the heat radiating portion (20) includes a plurality of fins (11, 12, 13, 14)
Implementation Method 2
the distance between rows of the fins (fluid guide) allows the horizontal flow of fluid
Data Source
AI summary
The invention relates to a improved heat sink. In one embodiment this is accomplished by a base member and a heat radiating portion, wherein heat radiating portion includes a plurality of fins, wherein the distance between rows of the plurality of fins (fluid guide) are arranged such that they don't obstruct the horizontal flow of fluid or change the characteristic of the fluid substantially.