| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a storage type water heater which suppresses fluctuations of hot water feeding temperature and inflow water temperature of a heating device and stabilizes water temperature when actuating two channel-switching means together. <P>SOLUTION: The storage type water heater 100 includes a hot water storage tank 10, channel switching valves 33, 34, a use side heat exchanger 22, a heat pump unit 60, a controller 70, etc. The controller 70 controls operation forms of the water heater by switching the forms of channel switching valves 33, 34. Further, when the controller 70 performs switching operations of the first and the second channel switching valves 33, 34 together, in accordance with the form after switching of at least one side channel switching valve, the channel switching valve to be switched in advance out of the respective channel switching means 33, 34 is made variable. Accordingly, on the transition of the operation form, it can be suppressed that low temperature water is mixed into a hot water feeding pipe 5 to fluctuate hot water feeding temperature and inflow water temperature of a heat pump unit 60. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
