| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a shortage of calorie during re-heating operation in a hot-water storage type water heater for re-heating bath tub water by exchanging the heat between the hot-water stored in a hot-water storage tank. <P>SOLUTION: This hot-water storage type water heater is provided with the hot-water storage tank 2 for storing hot-water, a heating means 3 for heating the hot-water stored in the hot-water storage tank 2, a stored hot-water temperature sensor 33 for detecting temperature of the hot-water stored in the hot-water tank 2, a circulation circuit 22 provided with a circulation pump 20 to circulate hot-water of a bath tub 6, and a heat exchanger 18 provided on the way of the circulation circuit 22 to heat the bath tub water with the hot-water stored in the hot-water tank 2, and the bath circulation pump 20 is driven to circulate the bath tub water to the heat exchanger 18 for re-heating. When temperature of the stored hot-water detected by the stored hot-water temperature sensor 33 is lowered by a predetermined value T2 or more after a predetermined time passes or within the predetermined time after starting re-heating operation, the heating means 3 is operated to start the operation for re-boiling the stored hot-water. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
