| 摘要 |
<P>PROBLEM TO BE SOLVED: To automatically carry out air venting of a boiling circuit 70 in a hot-water supply device 11 capable of restoring hot water heat-exchanged in a reheating circuit 53 or hot water boiled in the boiling circuit 70 to suitable height positions in a hot-water storage tank 17. <P>SOLUTION: Intake paths 48, 49, 50, capable of restoring the water taken out of the hot-water storage tank 17 to respective different height positions at upper/middle/lower parts of the hot-water storage tank 17, are switched by a switching valve 47. The hot water heat-exchanged in the reheating circuit 53 or the hot water boiled in the boiling circuit 70 is restored to the suitable height positions in the hot-water storage tank 17. At the time of controlling the air venting of the boiling circuit 70, the connection is switched to connection from the reheating circuit 53 to the boiling circuit 70 by using the switching valve 47 to drive a circulation pump 46 for reheating. The water taken out of the hot-water storage tank 17 to the reheating circuit 53 is forcibly fed to the boiling circuit 70 to automatically perform air venting of the boiling circuit 70. <P>COPYRIGHT: (C)2009,JPO&INPIT |
