| abstract |
(57) Abstract: The present invention provides a refrigerant charging method or an apparatus filled with a mixed refrigerant as an alternative to R22, R502 or R12. SOLUTION: A mixed refrigerant of a combustible hydrocarbon hydrocarbon refrigerant (a), an incombustible hydrocarbon refrigerant (b) which forms an azeotropic or azeotropic mixture with the above (a), and a refrigerant other than the above (a). Without premixing the non-flammable hydrogen hydrocarbon refrigerant (c), This is a method of filling a refrigerant container with a mixed refrigerant comprising (a), (b) and (c). In forming a non-azeotropic mixed refrigerant containing a combustible hydrocarbon refrigerant, a change in the composition of the mixed refrigerant can be suppressed. It can be simply and safely substituted for various uses. |