| 摘要 |
PROBLEM TO BE SOLVED: To improve a heating capacity of a heating thermal transfer pipe wound around a water tank.SOLUTION: A hot water supply heat exchanger 30 includes a water tank 31, and a heating thermal transfer pipe 40 wound around the water tank 31. The heating thermal transfer pipe 40 is sectioned into a plurality of heating areas 51, 52, 53 in a vertical direction. The plurality of heating areas each includes a plurality of refrigerant flow passages in which refrigerant flows in parallel. The number of the refrigerant flow passages is less in a lower area than an upper area. |
