| 摘要 |
PURPOSE:To perform comfortable air conditioning even during abnormal working of a mix damper, by a method wherein, during detection of abnormality of the mix damper, a deviation between the preset position of the mix damper and a target position is determined, and when the deviation is high, the number of revolutions of a blower motor is gradually reduced. CONSTITUTION:A mix damper abnormality detecting part 9 receives a mix damper control signal from a control part 3 to a mix damper drive device 8. Simultaneously, a rotation signal output from a mix damper 6 to the mix damper drive device 8 is monitored, and when no rotation signal is outputted even after lapse of a time longer than a time required for movement to a target position, an abnormal signal from the mix damper 6 is outputted to an abnormality processing part 10. The abnormality processing part 10 inputs a present position from a mix damper position detecting device 7 to determine a deviation between the present position and a target position. When the deviation is low, a blower motor is run at the target number of revolutions, and when the deviation is high, the number of revolutions is gradually decreased. This constitution enables execution of optimum control even during abnormal working. |
