Cooling and heating cycle apparatus and refrigerant cycle apparatus

摘要

A cooling and heating cycle apparatus includes a high pressure coolant gas discharged from an outlet port of a compressor and supplied selectively to one end or the other of a heat exchanger through a high/low pressure switch valve. A low pressure coolant gas expelled from the other end of the heat exchanger is supplied to an inlet port of the compressor through the high/low pressure switch valves. A low pressure coolant gas flow rate regulating valve for controlling a flow rate of the low pressure coolant gas supplied to the inlet portion of the compressor is disposed between the compressor and the high/low pressure switch valve.