| 摘要 |
PURPOSE:To stabilize the drive of a blower in a combustion type heating device which is adjustable in temperature, by providing a power control means for controlling the turn-on and -off of supply power to the blower and an input signal timing control means. CONSTITUTION:Transistors Tr2, Tr3 which constitute switching transistors in Darlinton connection, have an input circuit in which a capacitor C, a resistor R and a diode D are connected in series. A drive pulse applied to a fuel pump P is integrated by an integrating circuit consisting of the condenser C and the resistor R, and thus integrated voltage is applied to the base of the transistor Tr2 so as to close a switch Sw1 connected to the collector of the transistor Tr3 to apply power to a blower M. Thus, power to the blower is controlled with timing corresponding to drive pulses to the fuel pump P, thereby it is possible to prevent useless power consumption and to stabilizes the drive of the fuel pump P. |
