| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hot water supply device having high energy efficiency with reduced radiation loss.SOLUTION: A heat-pump hot water supply device comprises: a heat pump unit 1 including a refrigerant circuit 2 in which a compressor 21, a radiator 22, an expansion device 23, and an evaporator 24 are annularly connected by pipes and through which refrigerant circulates; and a hot water storage tank unit 4 including a hot water storage tank 41 storing hot water generated by the heat pump unit. The heat pump unit 1 is arranged above the hot water storage tank unit 4, and a heat resistance R1 between the hot water storage tank 41 and the heat pump unit 1 is higher than a heat resistance R2 between the hot water storage tank 41 and a side surface of the hot water storage tank unit 4. Therefore, it is possible to realize a hot water supply device capable of reducing a radiation amount from an upper portion of the hot water storage tank 41, and suppressing a radiation loss from the hot water storage tank 41 with minimum enhancement of heat insulation.</p> |
