高辐射阵列式LED水冷散热器的优化设计与实验

Design Optimization and Experiment of High Radiation Array LED Water Cooling Radiator

紫外固化机常采用阵列式UV-LED的模组以获得高辐射高密度能量,高能量对散热器优化设计提出了挑战。本文结合数值模拟与实验,研究了四种不同翅片数量的槽道式散热板的设计,结果发现:增加流量和翅片数量可以有效降低散热板表面温度,而且表面温度更加均匀,芯片极限温差缩小至4.38℃,但是会导致散热器进出口压差急剧增大;九翅片的压差比七翅片的增加了1 029 Pa,而极限温差仅下降了0.5℃,所以应综合考虑实际固化效果来合理选择翅片数量和流量。七翅片式散热板的验证实验表明:所测温度与仿真结果误差为3.5%,证实了仿真的正确性,对高辐射阵列式LED水冷散热器设计具有参考价值。

UV curing machines often use arrayed UV-LED modules to achieve high-radiation and high-density energy. High energy challenges the optimal design of the heat sink. This study combines numerical simulation and experiment to study the design of four different types of finned heat sinks. It is found that increasing the flow rate and the number of fins can effectively reduce the surface temperature of the heat sink and make the surface temperature more uniform. The limit temperature difference is reduced to 4.38 ℃, but the pressure difference between the inlet and outlet of the radiator is sharply increased;the pressure difference of the nine fins is increased by 1 029 Pa compared with the seven fins, and the limit temperature difference is only decreased by 0.5 ℃, so the actual curing should be considered comprehensively. The effect is to choose the number of fins and flow rate. The verification experiment of the seven-fin type heat sink shows that the error between the measured temperature and the simulation result is only 3.5%, which confirms the accuracy of the numerical simulation and has a good guiding significance for the design of the high-radiation array LED water-cooled heat sink.