Flashlight Thermal Management via Segmented Heat Sink
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Solution Overview
Problem
Portable lights with solid state light sources, such as LEDs, require effective heat management to maintain efficiency and reliability, as excessive heat can be detrimental to electronic circuitry and pose safety hazards, especially during abnormal conditions.
Innovation Solution
A portable light design incorporating a thermally-conductive heat sink with a heat dissipating part and a heat collecting part, where the light source and electronic circuit are thermally coupled via a conductive material to manage heat effectively, ensuring safe operation and extended battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermally-conductive heat sink with heat dissipating part and heat collecting part is used, then heat removal effectiveness is improved, but device complexity increases
Solution Approach 1:
The heat sink is divided into distinct functional parts: a heat collecting part that contacts the LED and electronic circuit, and a heat dissipating part with extended surfaces for heat rejection. This segmentation allows optimization of each part's function while maintaining overall thermal performance.
Solution Approach 2:
A thermally-conductive material is introduced as an intermediary between the electronic circuit and the heat collecting part of the heat sink, creating an effective thermal path without requiring direct contact between all components.
2Temperature
If thermally-conductive material is used between electronic circuit and heat sink, then thermal coupling is improved, but manufacturing complexity increases
Solution Approach 1:
The thermally-conductive material serves as a mediator that simplifies the thermal coupling process during assembly, allowing components to be mounted without requiring precise thermal contact while still achieving effective heat transfer to the heat sink.
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 enhances thermal coupling, allowing LEDs and electronic components to operate at lower temperatures, increasing efficiency, reliability, and safety while reducing the light's size and thermal resistance.
Implementation Method 1
a thermally-conductive heat sink having a heat dissipating part and a heat collecting part; a light source having a surface thermally coupled to the heat collecting part of the heat sink
Implementation Method 2
heat dissipating part and a heat collecting part
Implementation Method 3
a thermally-conductive material between the electronic circuit and the heat collecting part of the heat sink for providing a thermally conductive path therebetween
Data Source
AI summary
A portable light including thermal protection comprises a thermally-conductive heat sink having a heat dissipating part and a heat collecting part; a light source having a surface thermally coupled to the heat collecting part of the heat sink; an electronic circuit for controlling the light source, wherein the electronic circuit is adjacent the heat collecting portion of the heat sink; and a thermally-conductive material between the electronic circuit and the heat collecting part of the heat sink for providing a thermally conductive path therebetween.