| 摘要 |
PURPOSE:To suitably execute the alteration of the ingredient ratio of circulating refrigerant by respectively interposing expansion means between a separator and an evaporator in a high boiling point side discharge passage system and between a low point side liquid receiver and the evaporator in a low boiling point side discharge passage system. CONSTITUTION:A separator Sp for vapor-liquid separating mixed refrigerants A and B fed from a condenser Cd is provided in a mixed refrigerant heat pump in which non-azeotrope refrigerants A and B in which high boiling point refrigerant A and low boiling point refrigerant B are mixed are sequentially circulated through a compressor Cp, the condenser Cd, expansion means Ex and an evaporator Ev. The refrigerant B separated here is cooled by cooling means Coo to be stored in a liquid-phase state in a low boiling point side liquid receiver Rb, and its storage amount is regulated by low boiling point side regulating means Xb. The liquid-phase refrigerants A and B separated by the separator Sp are guided to the means Ex via a discharge passage La, and storage unnecessary refrigerant B guided from the receiver Rb is guided to the means Ex via a discharge passage Lb. |
