新型磁性蓄冷材料G—M制冷机的研制

对应用磁性蓄冷材料作为二级蓄冷器填料而研制的大制冷功率两级Ｇ－ Ｗ 制冷机的研究工作进行了总结，给出了理论分析及结构设计。并在一台样机进行了实验研究，通过优化制冷机结构参数和运行参数，使制冷机二级最低制冷温度达７．８ Ｋ、２０ Ｋ 时取得１４．５ Ｗ 的有效制冷量，从理论和试验上对应用磁性蓄冷材料改善Ｇ－ Ｍ 制冷机性能的有效性进行了有益的探索。

DEVELOPMENT OF G-M REFRIGERATORWITH NEW TYPE MAGNETIC REGENERATOR MATERIAL

This paper summarizes the development work of a big refrigeration capacity two stage G-M refrigerator which uses magnetic material as 2nd regenerator matrix.It gives the results of the theoretical study and the structural design.An experimental study has been done in a sample machine .By optimizing the machine structure and the operating parameters ,the no-load temperature of the second stage is 7.8 K.The net cooling capacity 14.5 W has been achieved at 20 K.From the theory and experiment,it explores the effectiveness of the improvement refrigeration performance with magnetic regenerator materials.