| 摘要 |
PROBLEM TO BE SOLVED: To obtain a mixed cooling medium excellent in cooling medium performance, capable of being used without largely changing a conventional cooling device, always exhibiting nonflammability on the leakage of the cooling medium from the device, and not causing the large change of the performance when used for a long period. SOLUTION: This mixed cooling medium comprises 47-48wt.% of difluoromethane and 53-52wt.% of pentafluoroethane. The cooling device uses this mixed cooling medium, a zeolite-based drying agent and a lubricant compatible with the mixed medium. |
