Patent ID: 8769974

Claim:
A heat pump system comprising: a heat source unit having a heat-source-side compressor arranged to compress a heat-source-side refrigerant; a heat-source-side heat exchanger; a variable-capacity heat-source-side blower configured to adjust heat exchange efficiency of said heat-source-side heat exchanger; and a heat-source-side switching mechanism switchable between a heat-source-side radiating operation state in which said heat-source-side heat exchanger functions as a radiator of the heat-source-side refrigerant, and a heat-source-side evaporating operation state in which said heat-source-side heat exchanger functions as an evaporator of the heat-source-side refrigerant; a first usage unit having a first usage-side heat exchanger operable as a radiator of the heat-source-side refrigerant compressed by said heat-source-side compressor, a radiation amount adjusting element configured to adjust an amount of radiation in an aqueous medium by radiation of the heat-source-side refrigerant in said first usage-side heat exchanger, and a first usage-side flow rate adjustment valve configured to adjust a flow rate of the heat-source-side refrigerant that flows through said first usage-side heat exchanger, the first usage unit being operable to perform an aqueous medium heating operation in which the aqueous medium is heated by radiation of the heat-source-side refrigerant in said first usage-side heat exchanger; and a second usage unit having a second usage-side heat exchanger operable at least as an evaporator of the heat-source-side refrigerant in said heat-source-side radiating operation state of said heat-source-side switching mechanism, and a second usage-side flow rate adjustment valve configured to adjust a flow rate of the heat-source-side refrigerant that flows through said second usage-side heat exchanger, the second usage unit being operable to perform an air-cooling operation in which an air medium is cooled by evaporation of the heat-source-side refrigerant in said second usage-side heat exchanger, the amount of radiation adjusted by said radiation amount adjusting element or operating capacity of said heat-source-side blower being controlled in accordance with a state of said first usage-side flow rate adjustment valve and said second usage-side flow rate adjustment valve in a case in which said second usage unit performs said air-cooling operation and said first usage unit performs said aqueous medium heating operation.