| 摘要 |
<p>PURPOSE:To avoid omission of indication of remaining hot-water and indicate correct amount of remaining water by a method wherein an indicating element, corresponding to a sensor provided at the lower part of the hot-water supplier, is lighted when the sensor has detected a predetermined temperature regardless of the existence of a signal from another sensor provided at the upper part of the hot-water supplier. CONSTITUTION:A hot-water reserving tank 1 is provided with a thermistor 2a at the upper part thereof, the thermistor 2c at the lower part thereof and the thermistor 2b at the middle part thereof. When a comparator 9, connected to the middle thermistor 2b, does not detect the signal of remaining hot-water detection due to the variability or the like of the thermistor or circuit element in spite of the existence of sufficient remaining hot-water in the lower part of the hot- water reserving tank 1, the comparator 8, connected to the lower thermistor 2c, outputs the signal of remaining hot-water detection and a LED14 is lighted by a LED driver 11. The LED15 is connected to the LED11 through a diode 19, therefore, the LED15 is lighted by the LED driver 11 even when the LED driver 12 does not operate and the indication under the omitted condition may be avoided.</p> |
