CONTROLLER FOR MOISTENING OPERATION

PURPOSE:To permit the detection of the failure of a control system for a humidifier and the operation of the humidifier during the failure period by a method in which a failure detector, a switcher for normal and abnormal periods, and an operation interruption commander during abnormal period are provided, and when a failure detection signal is inputted, switching is made to abnormal side, and when the failure detected signal is not inputted, switching is made to normal side. CONSTITUTION:An operation stoppage command signal 7 interlocking with the operation stoppage action of a humidifier is put in a switcher 8 for normal and abnormal periods and a failure detector 9. In the failure detector 9, count reset signal is used as an operation stoppage command signal 7 and the count-up value of a counter 15 is set up. A signal on whether or not count-up is made is put as a failure detection signal 17 into the switcher 8 for normal and abnormal periods, whereby normal and abnormal periods are switched. When normal value is shown, command signal corresponding to operation stoppage command signal 7 is outputted from the switcher 8 for normal and abnormal periods and the operation of a humidifier 12 is controlled through a humidifier driver 11. When abnormality is indicated, signal is sent out from an abnormal period operation interruption commander 10 to the switcher 8, and the intermittent operation of the humidifier 12 is made through the humidifier driver 11.