关于MMR制冷降温时间的分析

降温时间是ＭＭＲ制冷中的一个重要参数，加入高沸点组分，不仅可以维持较低的制冷温度并获得较大的制冷量，而且可以增大速冷性能。从相似理论出发，在已建立的纯氮降温时间模型的基础上，推导一个关于混合工质降温的关系式，并对该式进行了验证，最后得出一些有益的结论及提出了进一步研究的问题。

Analysis of the Cooling Time of MMR

Cooling time is an important parameter on MMR. Lower refrigerating temperature, more refrigerating capacity and more quick refrigerating performance can be attained by adding element of high boiling point. Based on similarity theory and the cooling time model of pure nitrogen, a formula of cooling time of cryogenic mixture was presented and further test was done on it. Some useful conclusions were attained and some problems which should be further studied were forwatded in the paper, too.