| 摘要 |
PURPOSE:To permit to control the amount of air for combustion in stable and accurate condition with a simple constitution by a method wherein a functional signal is generated in order to obtain the necessary amount of ventilation in accordance with a signal from the opening transmitter of a fuel control valve and a ventilator is controlled. CONSTITUTION:The data which changes exponential functionally so that the frequency becomes high in accordance with opening of the amount of oil control valve 6 and it becomes low in accordance with closing thereof, is memorized in advance to the memory 194 of an inverter controller 19. The resistance value of the opening transmit ter 13 is changed in accordance with the opening rate of the amount of oil control valve 6 and it is changed to a current value by an R/I converter 18. The current value thereof is inputted into the inverter controller 19, the frequency setting data corresponding from the memory 194 is read by the CPU193 and is inputted to the inverter 17 through the D/A converter 195 and the output circuit 196. The number of revolution of the ventilator 4 is changed in accordance with the frequency signal inputted and the necessary amount of air is sent to burn the fuel completely for an air box 2. According to this method, the pressure loss of the ventilating electric power may be reduced remarkably. |
