| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water storage unit, stably supplying hot water even when the heat load of heating is high by utilizing a heat source machine common to both of hot water supply and heating. <P>SOLUTION: Hot water in a hot water storage tank 14 is sent to a hot water supply port 14 by a hot water supply passage 46. Hot water in the hot water storage tank 14 is heated by a burner part 68. Some of the heated hot water is passed through a by-pass passage 79 and returned to the hot water storage tank 14 not through a heat exchanger 114 for a heater. The remaining heated hot water is passed through a burner circulating return passage 76b and returned to the hot water storage tank 14 after heat is supplied to the heater by the heat exchanger 114 for the heater. While heat is supplied to the heater by the heat exchanger 114 for the heater, hot water having required temperature can be stably supplied by the hot water returned to the hot water storage tank 145 as it is still high temperature not through the heat exchanger for the heater. <P>COPYRIGHT: (C)2008,JPO&INPIT |
