| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat pump hot-water supply device capable of carrying out hot-water supply by suppressing hot water shortage even when defrosting operation of an evaporator is carried out during supply of hot water produced by a heat exchanger for heat pump hot-water supply. <P>SOLUTION: In the heat pump hot-water supply device provided with a refrigerant circuit, a hot-water storage tank 7, a hot-water supply circuit, and a hot-water supply control circuit 21, a defrosting control circuit 23 is provided for carrying out defrosting by detecting frost formation of the evaporator 4 from a signal of a temperature sensor 22 detecting a temperature of the evaporator 4 and controlling an opening and closing valve 6, a remaining hot-water detection circuit 18 is provided for detecting a remaining hot-water amount of the hot-water storage tank 7 from signals of temperature sensors 15, 16, and 17 detecting hot-water temperatures in the hot-water storage tank 7, and the defrosting of the evaporator 4 is carried out with a delay of a predetermined time when the remaining hot-water amount at frost formation of the evaporator 4 is a predetermined value or less. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
