Humidification control system.

摘要

The humidity within a chamber (1) is detected by a humidity detector (2) and the proportional value, integrated value and differentiated value of the difference between the detected humidity and a preset objective value are added (11) to produce an operation amount signal. A predetermined period is divided into a spraying time of oscillating the oscillator (13) of an ultrasonic humidifier (12) with an amplitude such as to generate a predetermined sprayed amount per unit time, and a non-spraying time of oscillating the oscillator with such small amplitude as generates no spray from the ultrasonic humidifier. The predetermined period is repeated and the spraying time in each fixed period is adjusted in response to the operation amount signal to keep the humidity within the chamber constant.