| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composite heat source machine that can avoid an accidental temperature rise in a bathtub caused by natural circulation in a reheating circuit just after a reheating operation. <P>SOLUTION: As a heat source, high temperature water from a heating circuit is supplied via a thermal valve to a liquid-liquid heat exchanger supplied with circulated bathwater, to provide reheating by liquid-liquid heat exchange. Upon a reheating operation during a heating operation, after the reheating operation, a bath pump is stopped and a valve closing switch command is output to the thermal valve to prohibit valve opening (S13, S14). If the heating operation is continued, after the thermal valve is fully closed, the bath pump is operated for forced circulation for a time α to even out a temperature difference in the reheating circuit (S15: YES, S16: YES, S17, S18). After the evening, the valve opening prohibition on the thermal valve is removed (S19). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
