| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce waste of thermal energy when reheating warm water of a bath tub. <P>SOLUTION: A liquid circulation channel for heating for circulating liquid through a heating device and a reheating circulation channel connected to the bath tub are thermally connected via a liquid-liquid heat exchanger, the liquid in the liquid circulation channel for heating is circulated while being heated by a heat exchanger for heating, the warm water in the bath tub is circulated through the reheating circulation channel, thereby the reheating operation of the warm water in the bath tub is carried out. The cistern heat utilizing reheating controller 8 is installed continuing the circulation of liquid in the liquid circulation channel for heating and the circulation of the bath tub warm water in the reheating circulation channel while stopping the heating of the heat exchanger for heating when a detecting temperature of a bath temperature sensor 21 becomes reheating stopping temperature lower than the bath set temperature determined in advance and heating the bath tub warm water from the reheating stopping temperature to the bath set temperature utilizing the cistern holding heat quantity held by the cistern unit after stopping heating of the heat exchanger for heating. <P>COPYRIGHT: (C)2012,JPO&INPIT |
