| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a storage water heater in which instantaneous hot water utilization is easily performed. <P>SOLUTION: A storage water heater includes a can body temperature sensor 8 which is provided in an upper part of a sidewall of an outer can 1 and detects a storage hot water temperature in a hot water storage chamber 3, and a controller 9 which controls a combustion burner 4 through the can body temperature sensor 8 and retains the storage hot water temperature at a set hot water supply temperature. Water in the hot water storage chamber 3 supplied from a water supply pipe 10 is heated for conversion to hot water by heat exchange by the combustion of the combustion burner 4 and the discharge of exhaust gas through smoke tubes 6 and the hot water is supplied via a hot water supply pipe 11. A returning pipe 16 of a circulation circuit 13 of an instantaneous hot water unit 12 is connected to the water supply pipe 10, and a going pipe 17 of the circulation circuit 13 is connected to the hot water supply pipe 11. Further, the water supply pipe 10 includes a return temperature sensor 19 which detects a hot water temperature of return hot water. In accordance with the hot water temperature of the return hot water, a warmth retaining temperature of storage hot water is controlled to finally become the set hot water supply temperature through a plurality of stages. Therefore, there is not rapid temperature variation and instantaneous hot water supply can be performed with high user friendliness. <P>COPYRIGHT: (C)2012,JPO&INPIT |
