| 摘要 |
<p>PURPOSE:To keep the temperature of supplying hot-water in constant at all times and secure a large capacity while saving space safely without providing an user with uncomfortable feeling by a method wherein the excitation of all heating devices is stopped when either one of a temperature detecting element or a temperature overrise preventing device is operated. CONSTITUTION:A thermistor 6 is attached to the surface of a tank 1. A controller 7 detects a signal from the thermistor 6 and controls the excitation of a heater 5. The control of the excitation is not effected in individual tanks 1 and the thermistors 6, attached to a plurality of tanks 1, detect the hot-water temperature of respective tanks 1 individually to transmit heat up signals to the controller 7, however, the controller 7 receives the signals and controls only the excitation of the heaters 5 for all tanks 1. A security device 8 is also attached to the surface of the tank 1. The controller 7 stops the excitation of all heaters 5 when the signals are transmitted from the security devices 8. When hot-water is supplied, the temperature of supplying hot-water, reserved in a plurality of tanks 1, is constant in spite of the existence of variabilities in setting, which are generated in respective elements of the thermistors 6, and the existence of the variabilities in mountings accompanied by the mountings to each tanks 1.</p> |
