| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a power consumption in operation at low ambient temperatures. <P>SOLUTION: In this hot-water storage type hot-water supply device comprising a defrosting operation means for eliminating a frost produced in an evaporator in hot-water storage operation at low ambient temperatures, a drain port 23 is formed at the lower part of the evaporator 14, a freeze prevention heat exchanger 24 is installed between the drain port 23 and the evaporator 14, the freeze prevention heat exchanger 24 is connected to a hot water output tube 10 through an opening/closing valve 26 and a drain heat exchange input tube 25, and the freeze prevention heat exchanger 24 and a water input tube 9 between the hot-water storage tank and a circulation pump 16 are connected to each other through a heat exchange output tube 27. The device also comprises a freeze prevention means controlling the opening/closing valve 26 according to the defrosting operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
