| 摘要 |
PURPOSE:To permit the control of the number of rotation of a fan motor so as to cope with the temperature and the humidity of air simultaneously by a method wherein a temperature sensor and a humidity sensor are arranged to control the number of rotation of the fan motor based on the change of the outputs of both sensors. CONSTITUTION:The title controller is provided with the blades 2 of a fan motor, a temperature sensor 3, a humidity sensor 4 and the like. A comparing voltage, generated from a comparing voltage generating circuit 6 based on the change of the output of the temperature sensor 3, is compared with a reference voltage, generated from a reference voltage generating circuit 5 based on the change of the output of a humidity sensor 4, in a comparator 7 to drive a power amplifier unit 8 by a differential signal voltage from the comparator 7 while the number of rotation of the fan motor 9 is controlled by a power from the power amplifier unit 8. According to this method, the number of rotation of the fan motor 9 may be changed in accordance with the temperature and the humidity of air inside or outside of an instrument. |
