Patent ID: 9103571
Filing Date: 2015-08-11
Classification: F25B

Abstract:
1. A refrigeration apparatus comprising: a multistage compression mechanism in which one low-stage compression part and a plurality of high-stage compression parts are respectively connected in series; a heat-source-side main heat exchanger that functions as a radiator during a cooling operation, and functions as an evaporator during a heating operation; a plurality of heat-source-side sub heat exchangers that a usage-side heat exchanger that functions as an evaporator during the cooling operation and functions as a radiator during the heating operation; switching mechanisms that change conditions so that an expansion mechanism that a refrigerant piping group connecting the multistage compression mechanism, the switching mechanisms, the heat-source-side main heat exchanger, the heat-source-side sub heat exchangers, the expansion mechanism and the usage-side heat exchanger so that during the heating operation, the refrigerant flows in series to not less than two of the heat-source-side sub heat exchangers of the plurality of heat-source-side sub heat exchangers.