| 摘要 |
PURPOSE:To enable information concerning energy saving and set termperature to be displayed in a combustion control device by a method wherein an amount of electricity in a proportional control valve for controlling the quantity of combustion is applied as an input and is connected to the LED driving element for displaying a level meter for a plurality of LEDs at the output side. CONSTITUTION:A proportional control amplifier circuit 5 is operated in response to the temperature sensed by a temperature sensor 1 in such a way the temperature shows a value set by a temperature setting unit 2, an amount of electricity for a proportional control valve 9 is controlled so as to control an amount of combustion. An LED driving element 10 having input voltage of an amount of electricity of the proportional control valve 9 has the function of LED lighting switch with the input voltage level being equally divided in response to the number of LED elements 11a, 11b, 11c, 11d and 11e of the LED unit 11. Therefore, all the lamps can be lit up to the LED element 11e starting from only the lit LED element 11a in response to the amount of energization. Since the amount of energization of the proportional control valve 9 is proportional to the amount of combustion, the LED is lit in response to the amount of energization and the amount of combustion is displayed by a display in the level meter. |
