Heat Sink With Capillary Protrusions For LED Cooling
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Solution Overview
Problem
Conventional heat sinks for LED lighting devices suffer from inefficient heat radiation due to localized heat absorption by the substrate and poor fluid circulation, leading to reduced lifespan and performance.
Innovation Solution
A heat sink design featuring an outer case with capillary protrusions and medium dispersion passages, combined with heat radiation fins and a sealing cover, to enhance cooling medium vaporization and distribution, ensuring uniform cooling of the LED module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a substrate with a heat pipe is used to cool the LED package, then the LED package can be cooled, but the substrate absorbs heat locally causing temperature increase and potential malfunction
Solution Approach 1:
The cooling system is segmented into multiple independent heat radiation units distributed across the heat sink body. Each unit independently manages heat from specific LED packages, preventing localized heat accumulation and improving temperature uniformity across the entire system.
Solution Approach 2:
A thermal conductive adhesive layer is introduced as an intermediary between the LED package and the heat sink body. This intermediary efficiently transfers heat from the LED package to the heat sink while maintaining reliable electrical and thermal contact, preventing direct heat absorption issues by the substrate.
2Device complexity
If the substrate is designed as a simple container plate to accommodate operating fluid, then the structure is simple, but the returning passage is extended causing poor fluid circulation and inefficient heat radiation
Solution Approach 1:
The heat sink body is segmented into multiple heat radiation units, each with its own optimized fluid circulation path. This segmentation shortens the returning passage length for each unit, improving fluid circulation efficiency and heat radiation performance without significantly increasing overall structural complexity.
Solution Approach 2:
The heat radiation units are arranged in a distributed spatial pattern across the heat sink body. This dimensional arrangement optimizes fluid flow paths and heat transfer surfaces, enabling efficient heat radiation while maintaining a compact overall structure.
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 design improves heat radiation efficiency by dispersing cooling medium uniformly and increasing the surface area for heat exchange, preventing localized heat buildup and enhancing the overall cooling performance of the LED module.
Implementation Method 1
a cooling medium vaporized on a portion of the outer case coupled to the lighting device by means of the heat generated from the lighting device to cool the lighting device
Implementation Method 2
capillary protrusions are formed protrudingly from any one of the inner peripheral surface of the outer case and the outer peripheral surface of the inner case or both of the inner peripheral surface of the outer case and the outer peripheral surface of the inner case to reduce the filling space so that the cooling medium is dispersed to the filling space through the capillary phenomenon of the capillary protrusions
Data Source
AI summary
Disclosed is a heat sink for a lighting device, which radiates the heat generated from the lighting device, comprising: an outer case coupled to the lighting device; an inner case accommodated into the outer case in such a manner as to be spaced apart therefrom to form a filling space between the inner case and the outer case; and a cooling medium vaporized on a portion of the outer case coupled to the lighting device by means of the heat generated from the lighting device to cool the lighting device.