| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heating hot water supply device capable of performing proper heat-up control to improve the energy efficiency of a heat pump when a heating operation is performed by utilizing hot water stored in a hot water storage tank. <P>SOLUTION: In the case that a heating operation is performed by distributing warm water in a hot water storage tank 2 to a radiator 8, a control section 7 turns on a heat pump unit 1 when it is determined that a temperature of the warm water in a lower region of the hot water storage tank 2 is lowered in comparison with a heating return water temperature reference temperature. On the other hand, when the heating operation is not performed, the control section 7 turns on the heat pump unit 1 when it is determined that the temperature of warm water in the lower region of the hot water storage tank 2 is lowered in comparison with a predetermined set temperature. <P>COPYRIGHT: (C)2010,JPO&INPIT |
