| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ultrasonic humidifying device keeping a constant spraying amount of necessary visible mist without affected by the dispersion of electric current amplification factor of a transistor and that of voltage of a commercial power source. <P>SOLUTION: A control section 4 equipped with an LC oscillation circuit applying an ultrasonic vibrator 3 disposed in a water storage tank 2 as an inductance component, is equipped with: a resistance value variable element capable of increasing and decreasing a resistance value applied to a base electric current supply passage of a transistor driving the LC oscillation circuit according to a control signal; an electric current detecting circuit for detecting the electric current input from a power source, a voltage detecting circuit for detecting the voltage input from the power source; and a control circuit calculating a target value of input electric current to the control section on the basis of the target electric power at the control section decided on the basis of the relationship with the necessary amount of mist 10 and the detected input voltage, and creating the control signal instructing the increase and decrease of the resistance value on the basis of a result of the comparison of the calculated target electric current value with the detected input electric current. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
