| 摘要 |
PROBLEM TO BE SOLVED: To suppress variations of temperature of discharged hot water from a heating means when hot water supply is started during hot water storage operation, in a storage type water heater having a plurality of hot water storage tanks connected in series.SOLUTION: A storage type water heater 100 includes: a hot water supply side hot water storage tank 5 and a water-intake side hot water storage tank 6 connected in series; a hot water storage circuit for supplying water in the water-intake side hot water storage tank 6 to a heating means ( a heat pump unit 1) in addition to supplying the hot water heated by the heating means into the hot water supply side hot water storage tank 5; a bypass pipe 9 branched from the hot water storage circuit between the heating means and the hot water supply side hot water storage tank 5 connected to the water-intake side hot water storage tank 6; a flow channel switching means (a hot water supply switching valve 11) capable of switching a flow channel between the hot water storage circuit side and a bypass circuit side passing through the bypass pipe 9; and a control means for switching the flow channel switching means to the bypass circuit side when hot water supply to a hot water supply pipe 2 is detected by a hot water supply detecting means during hot water storage operation for storing the hot water heated by the heating means with hot water circulated in the hot water storage circuit. |
