| 摘要 |
Provided is a heat pump system with good efficiency by reducing the temperature difference to be pumped by a heat pump. A first heat pump (2) has a first evaporator (7) and a second evaporator (8). A second heat pump (3) is coupled to the first heat pump (2) via a condenser (12) that serves as the first evaporator (7). A heat source fluid (16) passes through, in order, the second evaporator (8) of the first heat pump (2) and an evaporator (14) of the second heat pump (3). The fluid to be heated (9) is heated at a condenser (5) of the first heat pump (2) without undergoing a phase change. |
