When it comes to air quality, it's easy to focus onPM2.5on,In fact, excess carbon dioxide is also invisible in the air“Killer”。For this statement, many consumers may be surprised, carbon dioxide is not non-toxic? How can it become a gas invisible "killer?

1. Air“Internal trouble”Carbon Dioxide

It all starts with CO2. As we all know, the content of oxygen and carbon dioxide in the atmosphere is relatively stable, and oxygen accounts21%Carbon dioxide accounted0.03%. carbon dioxide itself.Although it is not toxic, when the carbon dioxide content in the air exceeds the normal content, it will have an impact on human health.。

ThatWhy is there more carbon dioxide will lack oxygen?BecauseWhen people breathe, they absorb oxygen and exhale carbon dioxide. With more carbon dioxide, the oxygen content in the air will decrease accordingly, and people have become accustomed to the oxygen content in the living environment. When the amount of oxygen absorption is insufficient, it will naturally lead to people's maladjustment and cause people to breathe.No.Smooth and other symptoms of hypoxia。

Currently at home and abroadThe current indoor air quality standards, without exception, include carbon dioxide as a key regulated pollutant, and its content has long been an important indicator for evaluating indoor air quality.。

2. Modespise the lackOxygen

General lack of oxygen, everyoneexperienced. shortness of breath, weakness of limbs, drowsiness, lack of concentration, etc. With this reaction, the indoor carbon dioxide concentration has risen1000-5000 ppm。Such a concentration range, while not life-threatening, also causes damage to health. Severe hypoxia is even more frightening when the carbon dioxide concentration is in5000ppmThe above will causeBrain damage, coma, even death。

A classroom with many people,Crowded conference rooms, bedrooms, and cars are prone to high carbon dioxide concentrations. Take the bedroom, for example,2Personal sleep for one night8SmallIf you don't take a breath, the carbon dioxide concentration can rise4000ppm. Closed classrooms,60Pointsclock class time, carbon dioxide concentration can reach3000ppmCurrently in primary and secondary schools.Standard1500ppmof2times, andIn a car with tight windows, the carbon dioxide content is often in the range3000ppmAbove and rising.

Don't underestimate this general lack of oxygen. It is enough to affect the working efficiency of the human brain. Studies have shown that when carbon dioxide is in600ppm-4800ppmThe higher the concentration of carbon dioxide in the air, the lower the efficiency of people's study and work, and the higher the error rate of operation.

3.How to solve

Carbon dioxide in outdoor air in citiesThe concentration is usually400~500ppm. PassAfter passing the indoor air quality standards, we found that a comfortable and excellent indoor environment, the concentration of carbon dioxide is better controlled.600ppmThe following,This is almost the same as the outdoor carbon dioxide value. Therefore, the main way to solve the problem of hypoxia is to go to the room.OuitongWind ventilation, the introduction of fresh air. In the fresh air system, a very important component isCarbon DioxideSensor, carbon dioxideThe sensor can monitor the indoor carbon dioxide concentration online in real time, and adjust the opening of the fresh air system and the power supply air volume according to the concentration value.。

However, how to choose a suitableCO2The sensor is crucial,recommend use of Japanese importsCO2SensorCDM7160The sensor uses a single light source and dual wavelength mode, which has the advantages of high precision, long-term stable performance, long life, and small size.

CDM7160The main parameters:

Power supply:5.0±0.25V  

DCWorking principle: non-dispersive infrared absorption (NUMBER）

Detection range:300-5000ppm

Operating temperature:0-50℃

Operating humidity:0-85%RH

Output characteristics:UART/IICInterface      

Life:>5Year                               

Accuracy: ±50ppm+3%                           

Power consumption:10mA(Average)                         

CDM7160Usually used in high-speed rail stations, subway stations, airports, hospitals, libraries and other densely populated public places for a long time.,Can also be usedBEMS、HEMSSuch as the main indoor air quality control system.