| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot-water supply apparatus setting a first boiling temperature and a second boiling temperature at which the temperature of water reserved in a lower part of a tank can be decreased. <P>SOLUTION: A control device 40 calculates a first boiling temperature T1 in accordance with a required heat quantity to be reserved in a tank 10 when a boiling operation is carried out. When the calculated first boiling temperature is equal to or lower than a predetermined first temperature Tst1, the control device determines the first boiling temperature T1 at the calculated temperature, and further determines a second boiling temperature T2 at a predetermined second temperature Tst2 which is determined to be lower than the first predetermined temperature Tst1. When a calculated first boiling temperature T1 is higher than the predetermined first temperature Tst1, the control device determines the first boiling temperature T1 at the first predetermined temperature Tst1, and further determines a second boiling temperature T2 at a temperature calculated in accordance with the required heat quantity. <P>COPYRIGHT: (C)2012,JPO&INPIT |
