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A heat pump system includes a heat source unit, a first usage unit, and a second usage unit. The heat source unit has a heat-source-side compressor, a heat-source-side heat exchanger, a heat-source-side blower and a heat-source-side switching mechanism. The first usage unit has at least a radiation

A heat pump system includes a heat source unit, a first usage unit, and a second usage unit. The heat source unit has a heat-source-side compressor, a heat-source-side heat exchanger, a heat-source-side blower and a heat-source-side switching mechanism. The first usage unit has at least a radiation amount adjusting element and a first usage-side flow rate adjustment valve. The second usage unit has at least a second usage-side flow rate adjustment valve. In a case in which the second usage unit performs an air-cooling operation and the first usage unit performs an aqueous medium heating operation, the amount of radiation adjusted by the radiation amount adjusting element or operating capacity of the heat-source-side blower is controlled in accordance with a state of the first usage-side flow rate adjustment valve and the second usage-side flow rate adjustment valve.

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1. 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 exch

1. 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; anda 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, anda 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, anda 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; anda 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, anda 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. 2. The heat pump system according to claim 1, wherein a superheat-degree fixing control is performed in which a degree of superheat of said heat-source-side refrigerant in said second usage-side heat exchanger is fixed at a predetermined degree of superheat by adjusting an opening degree of said second usage-side flow rate adjustment valve; anda control is performed in which the airflow rate of said heat-source-side blower is decreased in a case in which said second usage-side flow rate adjustment valve reaches an opening degree equal to or greater than a predetermined opening degree. 3. The heat pump system according to claim 2, wherein said first usage-side heat exchanger is configured to exchange heat between the heat-source-side refrigerant and the aqueous medium. 4. The heat pump system according to claim 3, further comprising: an aqueous medium circuit configured to circulate an aqueous medium to exchange heat with the heat-source-side refrigerant in said first usage-side heat exchanger,said radiation amount adjusting element being a variable-capacity circulation pump,a subcooling-degree fixing control being performed in which a degree of subcooling of said heat-source-side refrigerant in said first usage-side heat exchanger is fixed at a predetermined degree of subcooling by adjusting an opening degree of said first usage-side flow rate adjustment valve, anda capacity of said circulation pump being controlled so that a flow rate of the aqueous medium circulated through said aqueous medium circuit decreases in a case in which said first usage-side flow rate adjustment valve reaches an opening degree equal to or greater than a predetermined opening degree. 5. The heat pump system according to claim 2, wherein said first usage-side heat exchanger is configured to exchange heat between the heat-source-side refrigerant and a usage-side refrigerant which is other than the heat-source-side refrigerant; andsaid first usage unit further includes a usage-side compressor arranged to compress the usage-side refrigerant, anda refrigerant/water heat exchanger operable as a radiator of the usage-side refrigerant to heat the aqueous medium,said first usage unit together with said first usage-side heat exchanger forming parts of a usage-side refrigerant circuit configured to circulate the usage-side refrigerant. 6. The heat pump system according to claim 5, further comprising: an aqueous medium circuit configured to circulate an aqueous medium to exchange heat with the usage-side refrigerant in said refrigerant/water heat exchanger, the aqueous medium circuit having said radiation amount adjusting element, which is a variable-capacity circulation pump,a subcooling-degree fixing control being performed in which a degree of subcooling of said heat-source-side refrigerant in said first usage-side heat exchanger is fixed at a predetermined degree of subcooling by adjusting an opening degree of said first usage-side flow rate adjustment valve, anda capacity of said circulation pump being controlled so that a flow rate of the aqueous medium circulated through said aqueous medium circuit decreases in a case in which said first usage-side flow rate adjustment valve reaches an opening degree equal to or greater than a predetermined opening degree. 7. The heat pump system according to claim 2, further comprising: a discharge refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from a discharge of said heat-source-side compressor in any of said heat-source-side radiating operation state and said heat-source-side evaporating operation state of said heat-source-side switching mechanism;a liquid refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from an outlet of said heat-source-side heat exchanger functioning as a radiator of the heat-source-side refrigerant in said heat-source-side radiating operation state of said heat-source-side switching mechanism, andintroducing the heat-source-side refrigerant into an inlet of said heat-source-side heat exchanger functioning as an evaporator of the heat-source-side refrigerant from outside said heat source unit in said heat-source-side evaporating operation state of said heat-source-side switching mechanism; anda gas refrigerant communication tube capable of introducing the heat-source-side refrigerant into an intake of said heat-source-side compressor from outside said heat source unit. 8. The heat pump system according to claim 1, wherein said first usage-side heat exchanger is configured to exchange heat between the heat-source-side refrigerant and the aqueous medium. 9. The heat pump system according to claim 8, further comprising: an aqueous medium circuit configured to circulate an aqueous medium to exchange heat with the heat-source-side refrigerant in said first usage-side heat exchanger,said radiation amount adjusting element being a variable-capacity circulation pump,a subcooling-degree fixing control being performed in which a degree of subcooling of said heat-source-side refrigerant in said first usage-side heat exchanger is fixed at a predetermined degree of subcooling by adjusting an opening degree of said first usage-side flow rate adjustment valve, anda capacity of said circulation pump being controlled so that a flow rate of the aqueous medium circulated through said aqueous medium circuit decreases in a case in which said first usage-side flow rate adjustment valve reaches an opening degree equal to or greater than a predetermined opening degree. 10. The heat pump system according to claim 9, further comprising: a discharge refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from a discharge of said heat-source-side compressor in any of said heat-source-side radiating operation state and said heat-source-side evaporating operation state of said heat-source-side switching mechanism;a liquid refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from an outlet of said heat-source-side heat exchanger functioning as a radiator of the heat-source-side refrigerant in said heat-source-side radiating operation state of said heat-source-side switching mechanism, andintroducing the heat-source-side refrigerant into an inlet of said heat-source-side heat exchanger functioning as an evaporator of the heat-source-side refrigerant from outside said heat source unit in said heat-source-side evaporating operation state of said heat-source-side switching mechanism; anda gas refrigerant communication tube capable of introducing the heat-source-side refrigerant into an intake of said heat-source-side compressor from outside said heat source unit. 11. The heat pump system according to claim 8, further comprising: a discharge refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from a discharge of said heat-source-side compressor in any of said heat-source-side radiating operation state and said heat-source-side evaporating operation state of said heat-source-side switching mechanism;a liquid refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from an outlet of said heat-source-side heat exchanger functioning as a radiator of the heat-source-side refrigerant in said heat-source-side radiating operation state of said heat-source-side switching mechanism, andintroducing the heat-source-side refrigerant into an inlet of said heat-source-side heat exchanger functioning as an evaporator of the heat-source-side refrigerant from outside said heat source unit in said heat-source-side evaporating operation state of said heat-source-side switching mechanism; anda gas refrigerant communication tube capable of introducing the heat-source-side refrigerant into an intake of said heat-source-side compressor from outside said heat source unit. 12. The heat pump system according to claim 1, wherein said first usage-side heat exchanger is configured to exchange heat between the heat-source-side refrigerant and a usage-side refrigerant which is other than the heat-source-side refrigerant; andsaid first usage unit further includes a usage-side compressor arranged to compress the usage-side refrigerant, anda refrigerant/water heat exchanger operable as a radiator of the usage-side refrigerant to heat the aqueous medium,said first usage unit together with said first usage-side heat exchanger forming parts of a usage-side refrigerant circuit configured to circulate the usage-side refrigerant. 13. The heat pump system according to claim 12, further comprising: an aqueous medium circuit configured to circulate an aqueous medium to exchange heat with the usage-side refrigerant in said refrigerant/water heat exchanger, the aqueous medium circuit having said radiation amount adjusting element, which is a variable-capacity circulation pump,a subcooling-degree fixing control being performed in which a degree of subcooling of said heat-source-side refrigerant in said first usage-side heat exchanger is fixed at a predetermined degree of subcooling by adjusting an opening degree of said first usage-side flow rate adjustment valve, anda capacity of said circulation pump being controlled so that a flow rate of the aqueous medium circulated through said aqueous medium circuit decreases in a case in which said first usage-side flow rate adjustment valve reaches an opening degree equal to or greater than a predetermined opening degree. 14. The heat pump system according to claim 13, further comprising: a discharge refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from a discharge of said heat-source-side compressor in any of said heat-source-side radiating operation state and said heat-source-side evaporating operation state of said heat-source-side switching mechanism;a liquid refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from an outlet of said heat-source-side heat exchanger functioning as a radiator of the heat-source-side refrigerant in said heat-source-side radiating operation state of said heat-source-side switching mechanism, andintroducing the heat-source-side refrigerant into an inlet of said heat-source-side heat exchanger functioning as an evaporator of the heat-source-side refrigerant from outside said heat source unit in said heat-source-side evaporating operation state of said heat-source-side switching mechanism; anda gas refrigerant communication tube capable of introducing the heat-source-side refrigerant into an intake of said heat-source-side compressor from outside said heat source unit. 15. The heat pump system according to claim 12, further comprising: a discharge refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from a discharge of said heat-source-side compressor in any of said heat-source-side radiating operation state and said heat-source-side evaporating operation state of said heat-source-side switching mechanism;a liquid refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from an outlet of said heat-source-side heat exchanger functioning as a radiator of the heat-source-side refrigerant in said heat-source-side radiating operation state of said heat-source-side switching mechanism, andintroducing the heat-source-side refrigerant into an inlet of said heat-source-side heat exchanger functioning as an evaporator of the heat-source-side refrigerant from outside said heat source unit in said heat-source-side evaporating operation state of said heat-source-side switching mechanism; anda gas refrigerant communication tube capable of introducing the heat-source-side refrigerant into an intake of said heat-source-side compressor from outside said heat source unit. 16. The heat pump system according to claim 1, further comprising: a discharge refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from a discharge of said heat-source-side compressor in any of said heat-source-side radiating operation state and said heat-source-side evaporating operation state of said heat-source-side switching mechanism;a liquid refrigerant communication tube capable of directing the heat-source-side refrigerant outside of said heat source unit from an outlet of said heat-source-side heat exchanger functioning as a radiator of the heat-source-side refrigerant in said heat-source-side radiating operation state of said heat-source-side switching mechanism, andintroducing the heat-source-side refrigerant into an inlet of said heat-source-side heat exchanger functioning as an evaporator of the heat-source-side refrigerant from outside said heat source unit in said heat-source-side evaporating operation state of said heat-source-side switching mechanism; anda gas refrigerant communication tube capable of introducing the heat-source-side refrigerant into an intake of said heat-source-side compressor from outside said heat source unit.