LED液冷设计及其小型化控制系统研究

文中为解决大功率发光二级管（Light-emitting Diode, LED）高热流密度及散热不均的问题，设计了仿剑麻形、蛛网形和方形直流道3种拓扑结构冷板。利用热设计仿真分析了3种结构的散热性能，结果发现仿剑麻形流道冷板的散热性能最佳，压降最小。实验测试证实仿剑麻形结构的均温性很好。同时，为了实时监控大功率LED等热源的散热工况，开发了一种小型化监控系统。该系统通过实时调节水泵及风扇的转速来优化LED的散热，并实现了控制系统的小型化及智能化，得到冷板的散热效果随水泵转速的加大而提升的规律，具有较高的实用价值。

Research on LED Liquid Cooling Design and Its Miniaturization Control System

In order to solve the problems of high heat flux density and uneven heat dissipation of high-power LED, three topological cold plates of imitation sisal, cobweb and square DC channels are designed in this paper. The heat dissipation performance of the three structures are analyzed by thermal simulation. It is found that the sisal-like runner cold plate has the best heat dissipation performance and the lowest pressure drop. The experimental test verifies that the sisal-like structure has good temperature uniformity. At the same time, in order to monitor the heat dissipation conditions of heat sources such as high-power LED in real time, a miniaturized monitoring system has been developed. This system optimizes the heat dissipation of the LED by adjusting the speed of the water pump and fan real-time. The miniaturization and intelligence of the control system are realized and the law is obtained that the heat dissipation effect of the cold plate increases with the increase of the speed of water pump, which has high practical value.