The optimal percentage of the mixtures can be found.With this percentage the performance of the cryocooler has been improved.It is useful for increasing the cooling power and COP.

• 通过调整混合工质的配比，改变工质的物性，使其在混合工质最佳配比下工作，对于改进制冷机的性能，提高制冷量和制冷系数等都是有益处的。