| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that since a refrigerant, e.g. hydrocarbon, having no adverse effect on warming of earth is a highly combustible refrigerant, an uncontrollable indoor firing source may cause firing upon leakage of refrigerant even if a product itself is specified to have no firing source and thereby a maximum safety countermeasure must be taken against leakage of refrigerant when combustible refrigerant is used. SOLUTION: The freezer/air conditioner comprises a refrigerating cycle where refrigerant delivered from a compressor passes through a condenser, dryer, a throttle and an evaporator and returns back to the compressor through a suction pipe. The freezer/air conditioner employs saturated hydrocarbon based combustible refrigerant where the effective diameter of molecule is 5-6Åand has an odorant for informing leakage of the saturated hydrocarbon based refrigerant where the effective diameter of molecules is larger than the thin hole diameter coupling voids in the crystal of drying agent in the dryer. Thin hole diameter of drying agent in the dryer is set in the range of 2.8-4Å.
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