| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antifreezer in a heat pump type water heater which inexpensively carries out thermally efficient freeze proofing of the heat pump type water heater. <P>SOLUTION: In the heat pump type water heater, water in a hot water storage tank 1 is heated in a gas cooler 21 of a heat pump part 2 by circulating water of the hot water storage tank 1 by a circulating pump 31, and high temperature hot water is stored in the hot water storage tank 1. When the heat pump part 2 is not operating, hot water of the hot water storage tank 1 is circulated in an opposite direction in water circulating pipings 32 and 33 of a water heating part 3. <P>COPYRIGHT: (C)2003,JPO |
