Study On Optimazation Design Of UV-LED Light Curing Unit Heat Dissipation Structure

In the field of ultraviolet curing,the UV-LED light source has the incomparable advantage of traditional halogen light source,but the heat dissipation of UV-LED has become the key problem that restricts its development.Therefore,the heat dissipation problem of the UV-LED is studied to optimize the radiator structure in order to improve its heat dissipation efficiency.On the basis of heat conduction,combined with three-dimensional model and finite element analysis method,the heat dissipation problem of UV-LED was analyzed theoretically,optimized design and experimental study.According to the theory of heat conduction and the key parameters of heat dissipation of UV-LED,a three-dimensional model of initial radiator and a model of thermal resistance are established.The mathematical equation of thermal resistance calculation of radiator is obtained,and the main factors affecting the effect of radiator are determined.According to the single factor change design experiment,four main parameters which affect the radiator effect are obtained.Considering the influence of multi-factor action on heat dissipation,four factors and three horizontal orthogonal experiments are designed.The factors that affect the heat dissipation effect are sorted and the optimal parameters are selected.The maximum power that can be satisfied by the optimized radiator is analyzed.The results show that the temperature of the UV-LED light source has a quadratic function relationship with the time,and the trend of temperature increase has slowed down and gradually stabilized;The luminescence efficiency of the UV-LED light source is linearly related to the temperature,and the higher the temperature,the lower the luminescence efficiency;The heat dissipation efficiency of convective fin radiator is higher in cold air conditioning environment;The orthogonal experimental results show that the optimal experimental combination is A3B3C2D1,and the radiator structure parameter is set optimally.Compared with the existing radiator model,it can cool down26.5743 ℃ and increase the luminous efficiency by approximately2.831m/W;The optimized radiator model has a maximum power of 91W.