| 摘要 |
PURPOSE:To always keep an aif-fuel ratio at a specified value and to maintain a complete combustion state by providing a detecting part to detect the number of revolutions of a fan for feeding hot air run by means of specified torque and a combustion control part to control the number of revolutions of a blower for combustion or the drive frequency of a pump according to the detected number of revolutions. CONSTITUTION:Based on a signals from a temperature set part 14 and a room temperature detecting part 15, commands S1 and S2 for high, medium and low are outputted to a combustion control part. Feedback is applied on a blower 4 for combustion by means of a number of revolutions detecting part 13A so that the number of revolutions equal to a value demanded by the command S1 from a combustion control part 12 is provided. The command S2 is outputted to a propeller fan 10 from the combustion control part 12 so that the rotation, e.g. high, medium, low is effected at constantly identical torque. The number of revolutions detected by a number of revolutions detecting part 13B is always reported to a deciding part 16. The deciding part 16 compares a signal S3 from the number of revolutions detecting part 13B with a signal S1 from the combustion control part 12 to output a correction command S4 to the combustion control part 12. |
