| 摘要 |
<p>PURPOSE:To make it possible to instantaneously make hot water without using a circulation circuit by instantaneously supplying hot water of a temperature more than a predetermined temperature via a small size hot water supply heat surce apparatus which functions as an auxiliary heat source provided in a hot water supply bypass pipe when starting hot water supply or the predetermined temperature cannot be obtained for some reason or other. CONSTITUTION:A hot water supply main pipe 14 is provided with a hot water bypass pipe 15 and a thermo-valve 16 which automatically opens or closs depending on a hot water level within the main pipe 14, just a the back of branching point. The bypass pipe 15 is provided with a small size hot water supply heat source apparatus (auxiliary heat source) 17, a resistor 18 which decreases the flow quantity of the bypass pipe 15 and a check valve 19 acting by a difference in the hot water pressure between the hot water supply main pipe 14 and the hot water supply bypass pipe 15. Just after starting of hot water supply, there is cooled hot water within the hot water supply main pipe 14. Since the temperature of hot water is low, the thermo-valve 16 is closed, and cooled hot water flows into the bypass pipe 15. Thus, hot water of a high temperature stored beforehand in the small-side hot water supply heat source apparatus 17 is driven out and supplied through a hot water supply plug 13.</p> |
