PURPOSE: To make the composition of HFC non-azeotropic refrigerant mixture uniform by providing a gasifying chamber for vaporizing liquid-phase refrigerant stored in the refrigerant reservoir of an accumulator to mix vapor-phase refrigerator of the accumulator in the accumulator in a refrigerator using the HFC non-azeotropic refrigerant mixture as refrigerant.

CONSTITUTION: In a refrigerating cycle using HFC non-azeotropic refrigerant mixture having no danger of destroying an ozonosphere layer and being noncombustible, the vapor-phase refrigerant 9 of the refrigerant fed from the inlet 15 of an accumulator 6a connected at its outlet 16 to a pipe at the suction side of a compressor is fed into a gasifying chamber 14 via a pipeline 11a for connecting a refrigerant reservoir 10a having a bottom 12 to the chamber 14. On the other hand, liquid-phase refrigerant 8 is stored in a refrigerant reservoir 10a, and introduced into the chamber 14 via a plurality of pores 13a formed at the pipeline 11a. The refrigerant 8 is gasified in the chamber 14, mixed with the refrigerant 9 in the chamber 14 to become the refrigerant mixture of uniform composition, which is sucked from the outlet 16 to the compressor.