| 摘要 |
<p>PURPOSE:To reduce the fluctuating width of supplying hot-water temperature by a method wherein a main body, having a combustion chamber, a heat exchanger and a main burner, and an auxiliary heating means, attached to the hot-water delivery pipe of the heat exchanger and heating hot-water in the hot-water delivery pipe, are provided in the device. CONSTITUTION:When the hot-water temperature in the heat exchanger 2 has risen to a preset temperature by the heating of main burner 4, a hot-water temperature sensor 17 detects it to put the main burner 4 OFF and the auxiliary burner 15 ON. When heating is finished, the hot-water temperature begins to reduce, however, heat is supplied by the auxiliary burner 15, therefore, lowering of the hot-water temperature may be reduced.</p> |
