双温区高效脉管制冷机性能研究

Study on Performance of An Efficiency Pulse Tube Refrigerator Operating at Two Temperature Zones

摘要: 采用单压缩机驱动的双温区脉管制冷机可以同时在不同制冷温度提供制冷需求。基于阻抗匹配特性，采用一台活塞直径为26 mm的动磁式线性压缩机，分别驱动高温区脉管冷指（HCF，110～170 K）和低温区脉管冷指（LCF，60～80 K）工作在不同制冷温区。一台冷指的制冷负载发生变化会对两台冷指的入口压力波动、压缩机位移以及另一台的制冷性能产生影响，典型的制冷性能为5.7 W@80 K&10.9 W@110 K和3.3 W@60 K&20 W@170 K，满足空间、能源以及医疗等应用。

Abstract: A two pulse tube cold fingers driven by a compressor can provide cooling capacities at different cooling temperature zones simultaneously.Based on the impedance matching characteristics,a moving magnetic linear compressor is used to drive a low temperature cold finger(LCF,60~80 K) and a high temperature cold finger(HCF,110~170 K).The change of the cooling characteristics of one cold finger will affect the inlet pressure fluctuations of the two cold fingers,the displacement of the linear compressor and the cooling characteristics of the other cold finger.The typical cooling performance of 5.7 W@80 K& 10.9 W@110 K and 3.3 W@60 K& 20 W@170 K can be achieved by the pulse tube refrigerator,which can satisfy the applications in space,energy and medical treatment.