| 摘要 |
PURPOSE:To prevent waste of power source voltage due to consumption of power for a motor, that is, to prevent a battery from weakening, by changing voltage, applied to the motor for a blower, being based on the power source voltage during operation of an external combustion heater which performs prior room heating. CONSTITUTION:A prior room heating timer controller 30, when it reaches the preset time, urges each relay 31, 32 while outputs an ignition signal to a burner unit 33. Then urging an accessory relay 24 and an ignition relay 22, voltage from a battery 40 is applied to a blower motor 11 and an automatic air conditioning controller 20. As a result, a control signal is output from the controller 30 to the controller 20 performing prior room heating by an external combustion heater. In this device, the voltage, applied to the motor 11 from the battery 40, is detected by the controller 20 in a point C. The motor 11 is controlled through an amplifier 25 based on the detected voltage. |
