Novel ultrasonic humidifier

Abstract

The invention discloses a novel ultrasonic humidifier which comprises a power circuit, an ultrasonic oscillating circuit, a pneumatic device connected with the output end of the ultrasonic oscillating circuit, an atomizing device and a water shortage detection circuit. The ultrasonic oscillating circuit comprises a main control chip, a mist amount regulating circuit, an automatic frequency regulating circuit, a power amplification circuit and a resonance circuit, wherein the mist amount regulating circuit and the automatic frequency regulating circuit are connected with the two input ends of the main control chip respectively, the power amplification circuit is connected with one output end of the main control chip, the resonance circuit is connected with the power amplification circuit and connected with the atomizing device, and the other output end of the main control chip is connected with the pneumatic device. The water shortage detection circuit detects ultrasonic waves conducted by water through an ultrasonic water level detection induction probe, ultrasonic signals enter a comparator through a peak detection circuit, the compared high-low electrical levels are transmitted to a pin 4 of the main control chip, the main control chip judges whether the water level is lower than the ultrasonic water level detection induction probe or not according to the electrical levels received by the pin 4, and thus the purpose of preventing dry burning is achieved.

Description

technical field [0001] The invention relates to a humidifier, in particular to a novel ultrasonic humidifier with compact circuit structure. Background technique [0002] In order to add humidity to dry indoors, people often use humidifiers to add moisture to the air. As a relatively mature humidification product, ultrasonic humidifier has won the favor of consumers. The working principle of ultrasonic humidifier is to use the principle of ultrasonic high-frequency oscillation to atomize water into ultra-fine particles of one to five microns. The water mist is diffused into the air, so as to achieve the purpose of evenly humidifying the air, moisturizing the air and accompanied by abundant negative oxygen ions, achieving uniform humidity, freshening the air, improving health, changing the dryness and heat of heating in winter, and creating a comfortable home environment. . [0003] The basic structure of traditional ultrasonic humidifier is generally composed of power supp...

AI Technical Summary

Problems solved by technology

[0003] The basic structure of a traditional ultrasonic humidifier is generally composed of a power supply circuit, a control circuit, an oscillating circuit, a fan and a transducer (piezoelectric ceramic sheet), and the control circuit includes a water shortage detection, water shortage indication and fog volume adjustment circuit. Water detection is generally a dry reed switch with a floating magnetic ring detection method, or a water surface probe detection method, and its circuit structure is relatively complicated

The oscillating circuit of traditional ultrasonic humidifiers generally adopts self-excited oscillation. As we all know, self-excited oscillation is harmful to the components in the circuit and will damage the life of the humidifier, and the frequency of the ultrasonic signal sent cannot automatically follow the resonant frequency of the atomizer.

Humidifier oscillating circuits are mostly driven by power tubes, which generate more heat and consume more power

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