Study on Thermal Dissipation Structure of LED Warning Light

[[abstract]]LED警示燈使用閃爍且高亮度的光線提示人們注意，多應用於高溫、潮濕及震動等惡劣環境下，密閉式無孔洞設計為防止內部電路因短路或光學受阻等影響，間接產生散熱不佳問題。本研究對LED警示燈設計散熱結構，於密閉環境自然對流進行模擬分析，並依該密閉式無孔洞設計提出散熱結構設計並進行模擬分析及研究，散熱結構設計分別為散熱鰭片及導熱柱與散熱片組合之結構。 研究結果得知導熱柱及散熱片組合結構，可簡化製造方法且保持其原有散熱功效，變更使用高熱傳導係數材料時，可使LED溫度下降；相較於散熱鰭片之鰭片間不易形成熱對流流動而導致散熱不易。且瓣形散熱片模擬結果使LED溫度降低至82 5ºC，實測為84 1ºC。[[abstract]]The study investigated LED warning light design and simulation of thermal structure on natural convection of closed environment The thermal structures were heat sink and assembly with the thermal column and fin In this study LED warning lights radiating structure design simulation analysis of natural convection in a closed environment and made no holes according to the enclosed design thermal design and simulation analysis and research respectively thermal design and thermal column and fins structure fins portfolio The experimental result show assembly with the thermal column and fin has a simple method and the same with the original design LED temperature This assembly can be reduced temperature of the LED when using high thermal conductivity material The fin spacing of heat sink for thermal performance is affected because it is difference to produce thermal convection The best thermal performances occurs in material is copper of thermal column and fin The results simulation and experimental of LED temperature of petals fin are 82 5ºC and 84 1º