| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of performing a hot water supply operation with a high efficiency as compared with a heating operation.SOLUTION: A heat exchanger includes: refrigerant piping 61 in which a refrigerant circulating in a heat pump cycle flows; piping 71 for hot water supply in which water exchanging heat with the refrigerant flowing in the refrigerant piping 61 and which is connected to a hot water supply terminal; and piping 81 for heating in which a fluid to be heated exchanging heat with the refrigerant flowing in the refrigerant piping 61 flows and which is connected to a heating apparatus. The refrigerant piping 61 is wound helically around an outer peripheral surface 71a of the piping 71 for hot water supply. The piping 81 for heating comes into contact with the refrigerant piping 61 from the outer peripheral side on the opposite side to the piping 71 for hot water supply arranged on the inner peripheral side of the refrigerant piping 61. |
