Atomization frequency tracking and water level detection system of atomization sheet

Abstract

The invention discloses an atomization frequency tracking and water level detection system of an atomization sheet. An MCU controller module is used for outputting a first PWM driving signal and a second PWM driving signal; the first driving module is used for amplifying the first PWM driving signal; the second driving module is used for amplifying the second PWM driving signal; the atomization sheet module is used for controlling an atomization sheet to oscillate according to the amplification signal so as to perform atomization, and modulating the amplification signal according to the atomization amount so as to obtain a modulation signal; the first frequency tracking water shortage detection module is used for demodulating and filtering the first modulation signal; the second frequency tracking water shortage detection module is used for demodulating and filtering the second modulation signal; and the MCU controller module is also used for controlling the frequency of the PWM driving signal according to the size of the demodulation signal. By means of the mode, the system can control the atomization piece to work according to the atomization amount, and the atomization piece can be controlled to stop working when water lacks.

Description

technical field [0001] The invention relates to the technical field of humidifiers, in particular to an atomization frequency tracking and water level detection system of an atomization sheet. Background technique [0002] Generally, there are two types of atomization oscillation in humidifiers: self-excited and other-excited. The oscillation tube of self-excited atomization generates a lot of heat and needs to add a heat sink. Moreover, the efficiency of self-excited atomization is low and the amount of fog is low, so it will gradually be used It is a radical atomization alternative. The current exciting atomization has a poor consistency of the natural frequency of the atomizer. When mass production, the atomizer with a large natural frequency deviation will have a small amount of fog, so that the exciting atomization cannot be popularized in mass production, and the water level detection circuit Or use the traditional mechanical and capacitive. Although the sensitivity ...

AI Technical Summary

Problems solved by technology

The current exciting atomization has a poor consistency of the natural frequency of the atomizer. When mass production, the atomizer with a large natural frequency deviation will have a small amount of fog, so that the exciting atomization cannot be popularized in mass production, and the water level detection circuit Still use the traditional mechanical and capacitive

Although the sensitivity of mechanical water level detection is very high, due to the complex structure of the detection mechanism, the complexity of the structure of the humidifier is increased, which makes the mold opening of the humidifier complicated, the production cost is high, and the finished product is bulky; the principle of capacitive water level detection is to use probes The capacitive change of the needle is used to judge whether there is water. Although this method has a simple structure of the detection mechanism and will not increase the structural complexity of the humidifier, it has low sensitivity, poor anti-interference ability, and easy misjudgment. It needs to be connected and detected, and it cannot be detected separately, which does not reflect the advantages of its exciting humidifier

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