| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-retaining water heater adopting EcoCute (R) easily installed, shortening a construction period, having a simple configuration, saving a space and running cost and enabling instantaneous delivery of hot water. SOLUTION: The heat-retaining water heater S is provided with a hot water storage tank 2 for storing hot water obtained by heating water or low-temperature hot water by a heat pump water heater 1; a circulating pump 6 for circulating remaining hot water remaining within hot water supply piping 11 at stop of hot water supply via the hot water supply piping 11 using hot water supplied from the hot water storage tank 2; and a heat storage closed tank 5 filled with hot water supplied from the hot water storage tank 2. The heat storage closed tank 5 is provided with a built-in hot water heating coil 5a passing remaining hot water and heating the remaining hot water through heat exchange with the supplied hot water and with a built-in auxiliary heater 5c for heating, when the hot water supplied from the hot water storage tank 2 is cooled, the cooled hot water. COPYRIGHT: (C)2010,JPO&INPIT |
