Biological air purifier with function of non-contact media humidity detection
A technology for air purifiers and humidity monitoring, applied in air quality improvement, chemical instruments and methods, botany equipment and methods, etc., capable of solving problems such as death, loss of moisture in cultivation medium, damage to plants and microbial growth, etc.
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[0012] The present invention will be described below according to the accompanying drawings.
[0013] figure 1 Among them, P1 is a commonly used capacitive soil humidity sensor module, which is installed in the cultivation medium of the biological air filter and purification device, and its output voltage value changes linearly with the humidity of the cultivation medium. After adjustment, it is connected to the detection input terminal of the detection control circuit composed of operational amplifier circuit IC1 (LM358), that is, the positive phase input terminal. When the water content of the cultivation medium is sufficient, that is, the humidity is normal, the output voltage value of the humidity sensor P1 is relatively large. The output terminal of IC1 is high level, the relay J1 is not closed, and the 12V power supply is connected to the fan M through the normally closed contact of J1, so that the fan M works, that is, the biological air filter works normally.
[0014]...
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