中文摘要：

为了使差示扫描量热仪中加热炉快速的从400℃以上的高温冷却到室温，设计了一套采用小尺度蒸发器的单级制冷系统。为保证冷却过程中蒸发器内部温度场的均匀性及冷却效果，利用CFD商业软件，对该蒸发器内部流体的温度场进行数值模拟，并对蒸发器表面温度进行了试验测量。试验结果表明，蒸发器内壁面温度达到设计要求（-35℃）；蒸发器整体温度分布均匀，轴向温差小于1℃；模拟结果与试验测量结果基本吻合。在此基础上进一步对该蒸发器进行了优化设计，将其内壁面改为波纹面，采用波纹面的蒸发器与加热炉的换热空间内，被冷却空气的比例增大，空气出口温度明显降低，冷却效果增强。

英文摘要：

A refrigeration system with a small-scale evaporator for cooling the heating furnace of the Differential Scanning Calo -rimeter from 400℃to ambient temperature rapidly was designed .To ensure the temperature uniformity and the cooling effect in the evaporator during the cooling process ,the evaporator temperature distribution was simulated by using the CFD commercial soft -ware and measured experimentally .The temperature of the evaporator reaches the design requirements （-35℃）;The overall tem-perature distributes uniformly ,and the axial temperature difference is less than 1℃;The results obtained by numerical simulating was in agreement with the experimental data .Further more,the optimization design was conducted by changing the inner surface of the evaporator into the wavy surface .The proportion of air to be cooled between the evaporator and the furnace increased and the outlet temperature of the air decreased obviously .The cooling effect is improved through the optimization .