| 摘要 |
<p>A heat pump system (1) includes a heat-source-side refrigerant circuit (20) which has a heat-source-side compressor (21), a first usage-side heat exchanger (41a) which functions as a radiator of a heat-source-side refrigerant, and a heat-source-side heat exchanger (24) which functions as an evaporator of the heat-source-side refrigerant; and a usage-side refrigerant circuit (40a) which has a usage-side compressor (62a) for compressing a usage-side refrigerant whose pressure corresponding to a saturated gas temperature of 65°C is 2.8 MPa or less at gauge pressure, a refrigerant-water heat exchanger (65a) which functions as a radiator of the usage-side refrigerant and heats an aqueous medium, and a first usage-side heat exchanger (41a) which functions as an evaporator of the usage-side refrigerant by the radiation of the heat-source-side refrigerant; wherein the weight of the usage-side refrigerant enclosed in the usage-side refrigerant circuit (40a) is one to three times the weight of the refrigeration machine oil enclosed for lubricating the usage-side compressor (62a).</p> |
