| 摘要 |
<p>PURPOSE:To simplify the structure of a hot water supplier side circuit and to reduce the cost of parts by connecting a display unit in series with a constant-current element 39, and connecting them with a switching element opening or closing in accordance with the change of a voltage supplied to a remote controller from the hot water supplier via a transmission lines. CONSTITUTION:A series circuit consisting of a switching element 38 acting in accordance with the change of a voltage supplied from a hot water supplier 1 to a remote control part 6 via transmission lines 8 and 9 and a series circuit consisting of a constant-current element 39 and a display unit 33, are provided in parallel with a setter 28. According to this structure, in accordance with the change in a voltage supplied to a remote controller 6, the switching element 35 is actuated and power supply to a display unit is controlled. Hence, there is no need to provide a constant-current generating circuit, and the simplification of the circuit structure of the hot water supplier 1 and reduction in the cost of parts become possible. Further, due to the lighting of display units 33 and 34, the confirmation of the different operational state of the supplier becomes possible.</p> |
