Abstract:
A heat insulating box of a refrigerator includes a inflammable heat-insulator particularly a vacuum heat-insulator made of a board-shape molded inorganic fiber. Therewith inflammability of the heat insulator is ensured and a refrigerator box prevented from catching an outside caused fire is achieved, thus a refrigerator which is safe even when a flammable refrigerant is used and which is high in energy-saving is provided.
Abstract:
It is an object to keep a level of an odorant at a detectable level upon leakage of a refrigerant contained in a refrigerating system of a refrigerant compression type in a refrigerating/air-conditioning field in which a hydrocarbon refrigerant blended with the odorant is used. The present invention provides a refrigerant composition which includes at least one selected from ethane, propane, cyclopropane, propylene and iso-butane, and the composition contains ammonia as the odorant in the range between 1 % and 60 % by weight and preferably between 1 % and 20 % by weight.