| 摘要 |
PROBLEM TO BE SOLVED: To obtain an abnormality detector capable of correctly detecting falling-off of a fan and disconnection of a fan motor, and alarming about it, in a refrigerator including a controller for controlling revolutions by adjusting voltage applied to the fan motors disposed inside and outside the refrigerator. SOLUTION: A microcomputer 2 includes detection means for detecting a current flowing through a fan motor 17 or 26, and alarming means whereby when applied voltage to the fan motor is minimum, a current to the fan motor is taken as set value data while when the applied voltage to the motor is maximum, a slightly smaller value than a difference between the flowing current value and the set value data is taken as deviation data and is held, and further when the state where the flowing current value is smaller than the set data value passes for a predetermined time interval based upon an output of the current detection means, the current value is stored, and the applied voltage to the motor is made maximum, and when the state where a current value flowing thereafter is smaller than the stored current value and the deviation data added thereto passes for a predetermined time, it is judged to be abnormality and alarm is given. |
