| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water heater with a simple and sanitary system, high hot water filling performance to a bathtub, and high reheating performance, not generating noise during water supply. <P>SOLUTION: The water heater S includes circulation circuits 41, 42, 44 for heating deriving hot water from a first takeout opening 10 of a hot water storage tank 1 upper part by a hot water supply circulating pump 18, passing it through a primary side of a hot water supply heat exchanger 4 to carry out heat exchange, and returning the hot water to a lower part of the hot water storage tank 1, a hot water supply circuit introducing tap water to a secondary side of the hot water supply heat exchanger 4, heating it to a predetermined set temperature, and supplying it to a hot water supply portion 19, a hot water filling circuit 2Y supplying hot water of mixing the hot water from the first takeout opening 10 of the hot water storage tank 1 upper part and tap water introduced via a pressure reducing valve 6 by a first mixing valve 14 to the predetermined set temperature to the bathtub 2, and a circulation circuit 2 for reheating circulating water in the bathtub 2 in a reheating heat exchanger 24 of a hot water storage tank 1 interior upper part, carrying out heat exchange with hot water of the hot water storage tank 1 interior upper part to carry out heating, and supplying it to the bathtub 2. <P>COPYRIGHT: (C)2010,JPO&INPIT |
