SPRAY CONTROL CIRCUIT FOR HUMIDIFIER

摘要

PURPOSE: A spray control circuit for humidifier is provided to prevent damage to circuit components caused by over-voltage, and suppress power consumption. CONSTITUTION: A spray control circuit comprises a voltage distribution unit(R11,R12,R13) for distributing input voltage; an oscillator(TD11) for oscillating for spraying action; a driving unit(C11,C14,L11) driven by the output voltage from the voltage distribution unit, and which generates parallel oscillation voltage for oscillating the oscillator; and a voltage limiting unit for limiting the voltage which is output from the voltage distribution unit and applied to the driving unit. The voltage limiting unit includes a sensor for detecting the size of the input current; a Zener diode(ZD1) for generating turn-on current in accordance with the sensed value from the sensor and in proportion to the degree of excess of input voltage with respect to the rating value; and a mute unit(TR2,TR11) for muting the output from the voltage distribution unit in accordance with the turn-on current generated from the Zener diode.