Driving method and driving circuit of ultrasonic atomizer

Abstract

The invention discloses a driving method and a driving circuit of an ultrasonic atomizer. The driving circuit comprises a control unit, an ultrasonic atomizing sheet, an inductor L and an MOS transistor, wherein the inductor L is connected with a power source VCC, the ultrasonic atomizing sheet and the MOS transistor are connected with the inductor L respectively, the control unit is connected with the MOS transistor, and the MOS transistor and the control unit are further connected with a feedback resistor R. According to the driving method, the control unit supplies an oscillation signal ata certain frequency to the MOS transistor, the ultrasonic atomizing sheet is driven through amplification of signals of the MOS transistor and the inductor L, the frequency F0 of a driving signal provided by the control unit is determined through feedback of the voltage of the resistor R to the control unit, and the atomizer performs atomizing work under the driving of the frequency F0. In this way, the atomizing water level of the atomizer can be raised to the maximum extent, the height of an atomizing water column is lowered, noise generated during spraying on an exciting circuit clearance is lowered, the working current of the atomizer is reduced, and atomizing amounts at different atomizing water levels are balanced.

Description

technical field [0001] The invention relates to the technical field of ultrasonic nebulizers, in particular to a driving method and a driving circuit of an independently excited ultrasonic generator. Background technique [0002] Ultrasonic nebulizers are used in many occasions. Because the ultrasonic nebulizer uses its excitation circuit to adjust the fog volume, fog volume control and water level depth control, but there is no perfect method for these controls at present. The gap spray method is generally used. That is, spray for a period of time and stop spraying for a period of time. The disadvantage is that there is noise, and the second is that as the duty cycle of the gap spray increases, the depth of the water level that can be atomized also decreases. In addition, it is now popular to add a floating energy-concentrating cover instead of adding a water tank to correct the defects of traditional atomizers with different atomization volumes at different water levels. ...

AI Technical Summary

Problems solved by technology

The disadvantage is that there is noise, and the second is that as the duty cycle of the gap spray increases, the water level depth that can be atomized also decreases.

In addition, it is now popular to add a floating energy-concentrating cover instead of adding a water tank to correct the defects of traditional atomizers with different atomization volumes at different water levels. However, this method involves complex structures, poor correction effects, and low The amount of atomization at the water level will decrease, and there will be no practical atomization effect for a period of low water level

In order to obtain a higher atomized water level and a larger atomized amount for a general atomizer, the greater the depth of the atomized water level (the distance from the water surface to the atomized sheet), the higher the height of the water column of the atomizer (from The height of the water surface), so the water column of the atomizer needs a larger space for fogging, which will increase the volume of the humidifier

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