Signal conditioning circuit-based automatic cleaning system of air purifier

Abstract

The invention discloses a signal conditioning circuit-based automatic cleaning system of an air purifier. The system comprises a photoelectric sensor, a signal conditioning circuit, an analog-to-digital converter, a processor, an input module, a clock module and a filter screen automatic cleaning device. The signal conditioning circuit comprises a trap circuit, a filter circuit, an amplifier circuit and a rectifier circuit, wherein the trap circuit, the filter circuit, the amplifier circuit and the rectifier circuit are sequentially connected. The trap circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor and an operational amplifier. One end of the first resistor is respectively connected with one end of the first capacitor and one end of the second capacitor. One end of the second resistor is respectively connected with one end of the fourth resistor and the positive electrode of the operational amplifier. The other end of the fourth resistor is grounded. The other end of the second capacitor is respectively connected with one end of the third resistor and the negative electrode of the operational amplifier. The other end of the third resistor is respectively connected with the other end of the first capacitor and the output terminal of the operational amplifier. According to the technical scheme of the invention, on the basis of a signal conditioning circuit, a filter screen can be automatically cleaned.

Description

technical field [0001] The invention relates to the technical field of air purifiers, in particular to an automatic cleaning system for air purifiers based on a signal conditioning circuit. Background technique [0002] With the continuous change of global climate and the frequent appearance of various extreme climates, air purifiers have become an indispensable household appliance in people's daily life. However, a large amount of dust, bacteria and mold will accumulate on the filter screen inside the frequently used air purifier, which is not conducive to ventilation and affects the heating or cooling effect, and is not conducive to human health. According to the data from the Chinese Center for Disease Control and Prevention, if the air purifier is seriously polluted, it will cause sub-health and various diseases. But this problem has not attracted enough attention of people, and many people do not have the habit of cleaning the filter screen frequently. [0003] With t...

AI Technical Summary

Problems solved by technology

For users who are not familiar with the structure of the air purifier and those who are not proficient in cleaning the air purifier manually, this task becomes a burden when using the air purifier, or they can only entrust professional personnel to assist in the operation, or Simply ignore the problem that the filter screen after long-term use may pollute the air environment again, and continue to use the air purifier without cleaning it

As we all know, if the air purifier is used every day without regular cleaning, there will still be a lot of bacteria and dust on the filter, which will cause great harm to the human body and shorten the life of the machine