| 摘要 |
PROBLEM TO BE SOLVED: To further enhance operational efficiency of a heat pump provided with a cascade heat exchanger and improve energy-saving performance of the heat pump.SOLUTION: In a heat pump including a heating-side circuit (10) and a cooling-side circuit (20) connected through a cascade heat exchanger (14), a zeotropic refrigerant mixture is used as a refrigerant circulated in the heating-side circuit (10), and a boosting heat exchanger (15) for further evaporating the zeotropic refrigerant mixture evaporated in the cascade heat exchanger (14), is disposed in the heating-side circuit (10). |
