Low-voltage low-power ultrasonic atomizer driving circuit and driving method thereof

Abstract

The invention discloses a low-voltage low-power ultrasonic atomizer driving circuit and a driving method thereof, which are applied to an ultrasonic atomizer. The low-voltage low-power ultrasonic atomizer driving circuit comprises a MOS tube, an inductor L, a diode D, a resistor, a capacitor and an ultrasonic atomizing circuit, wherein the working current of a DC 2.7 V to 6V power supply is 300MAto 1.5 A. The MOS tube or a DC- DC boost chip circuit structure performs a period of time of charging, boosting and atomization on the capacitor, so that the capacitor accumulates a larger amount of energy. The MOS transistor driving circuit receives a PWM signal and a circuit reading signal to control the stability of input current, and receives a voltage detection signal to control the atomization working time of ultrasonic atomizer. T The DC-DC boost chip driver circuit receives a current reading signal and a current control signal to control the stability of input current. The ultrasonic atomizing circuit is connected with atomizer control signal to control starting and stopping of atomization. Therefore the ultrasonic atomize has good mist quantity and water depth adaptability, thereby realizing no requirement for arrangement of an energy gathering cover and realizing working effects of repeated charging and repeated atomization.

Description

technical field [0001] The invention relates to the technical field of ultrasonic nebulizers, in particular to a driving circuit and a driving method of an ultrasonic nebulizer with low voltage and low power consumption. Background technique [0002] Ultrasonic atomization devices used for humidification, fragrance, sterilization or decoration in daily life can atomize the liquid contained in the liquid container through the ultrasonic wave generated by the ultrasonic generator, so as to realize its atomization function. Traditional ultrasonic The atomizer is composed of a transducer and a drive circuit. Its operating frequency is generally 1.7MHZ, 2MHZ, 2.4MHZ, 3MHZ, 3.3MHZ and 3.5MHZ, etc. The power generally needs to be greater than 4 watts to generate enough energy to atomize water. And meet the needs of practical use. For low-voltage use, such as equal to 5V, the energy required to produce a practical atomization effect will be greater, and the energy required is great...

AI Technical Summary

Problems solved by technology

[0003] The 5V ultrasonic nebulizer that is popular now is used to boost the voltage and then supply power to the atomization circuit. The energy cover is basically useless, and the use of the energy-concentrating cover will bring many adverse consequences, such as difficult to clean, easy to foam and block the fog hole without fogging. Provide a low-cost energy-saving cover that does not need to be installed , low voltage and low power consumption, compared with the current popular circuit, at the same input voltage, the same input current, the same atomization sheet, the same atomization structure, the amount of fog produced by the ultrasonic atomizer of this technical solution It is more than 1 times larger than the traditional fog volume, and the depth of the atomized water level is more than 1.3 times that of the traditional one. The ultrasonic atomizer that can increase the atomization volume is an urgent demand in the market today, and has market potential.

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