Sensors help solve the harm of indoor air pollution TVOC

The hot summer has come, and the north and south have unified the high-temperature "steaming" mode. At this time, it is more comfortable to stay indoors, eat watermelon cold drinks, and blow on the air conditioner. However, the sudden increase in indoor air pollution in summer is always right. You hurt.

Formaldehyde and TVOC

In summer, the temperature and humidity increase simultaneously, and the release of indoor toxic and harmful gases will also increase. Japanese indoor environmental experts have shown that when the indoor temperature reaches 30°C, the release of toxic and harmful gases is the highest. Among them, formaldehyde and TVOC are the main culprits.

The boiling point of formaldehyde is 19°C. As the temperature rises, the amount of formaldehyde released will increase. According to survey data, in summer, on average, every two households have indoor formaldehyde exceeding the standard, especially the hottest 7. In August, the over-standard rate of formaldehyde can reach more than 52%!

Excessive carbon dioxide

Indoors in summer, most of us are accustomed to turning on the air conditioner and closing the doors and windows tightly. This will cause the indoor carbon dioxide concentration to rise sharply and the oxygen content to decrease, causing the body to produce symptoms of poisoning such as depression, dizziness, and nausea. According to a study by the US "Environment and Health Outlook", rising carbon dioxide concentration will cause hundreds of millions of people to be malnourished, delaying the development of infants and young children. The higher the carbon dioxide concentration, the greater the harm to the human body, and even death!

Growth of germs and microorganisms

The summer is hot and rainy in the south. This is a period of violent reproduction of various pathogens and fungi, especially in dark and humid corners, where the speed of microbial growth and reproduction is often beyond our imagination. These fungal spores will spread in the air and enter the human body with breathing, causing a variety of uncomfortable symptoms. This is also one of the causes of frequent allergic diseases in summer.

Horrible air-conditioning pollution

Summer is the season with the highest air-conditioning utilization rate. According to data from the Chinese Center for Disease Control and Prevention, 42% of indoor air pollution sources come from air-conditioning systems. The dark and humid environment inside the air conditioner will accumulate a lot of pollutants such as dust, mold, virus, and mites. Authoritative data shows that the total amount of bacteria on the heat sink of household air conditioners exceeds 10,000 times the national standard for central air conditioners, which contains a large number of pathogenic bacteria such as Legionella, mold, and Staphylococcus aureus.

The pollution of central air-conditioning is even more terrible. According to reports, when cleaning the central air-conditioning in an office building in Beijing, 2 tons of multiple pollutants were removed from the air duct.

How to prevent and control air pollution in summer?

1. Clean the air conditioner first

Before turning on the air conditioner in summer, professionals should be asked to thoroughly clean the inside of the air conditioner to remove the contaminants accumulated on the air outlet, ducts, heat sink, and filter. In particular, special disinfection and sterilization of invisible viruses and bacteria should be done. Whether it is a household air conditioner or a central air conditioner, it should be cleaned regularly.

2. Strengthen indoor ventilation

Enhancing indoor ventilation can not only dilute indoor carbon dioxide concentration and droplet concentration, increase oxygen content, but also prevent and control viruses from spreading infection in the air. A recent study by Professor Shelley Miller from the University of Colorado in the United States shows that reducing indoor carbon dioxide concentration, strengthening indoor ventilation, and using air purification devices can effectively reduce the risk of indoor infection with viruses.

Maintaining indoor long-term ventilation is currently recognized as the most effective and economical way to remove formaldehyde and TVOC toxic and harmful gases. Experts recommend opening windows for ventilation in summer 3-4 times a day, with no less than 20-30 minutes each time. If the air conditioner is turned on on a cloudy or rainy day, or when the ventilation conditions of the building are not ideal, it can be used. Fresh air system to maintain indoor ventilation.

3. Turn on the air purifier

Many people regard air purifiers as an accessory in the autumn and winter haze seasons, but in fact, according to data from the Indoor Air Quality Monitoring Center, indoor air pollution in summer is more than 20% higher than in other seasons.

A large number of mites and germs in summer can easily produce peculiar smells indoors. All kinds of toxic and harmful gases, fine particles, allergens and other pollutants floating in the mixed air make the pollution components very complex. If you want to quickly clean the "dirty air" in the room, you can turn on the air purifier and maintain continuous purification. The core of air purifiers and fresh air systems is the air quality sensor. The quality and price of air quality are particularly critical. Here, I recommend a Japanese imported indoor air quality sensor TGS2602, which is sensitive to formaldehyde, ammonia, and VOCs. It has good sensitivity, small size, long life, low price and other advantages. It is very suitable for fresh air system and air purifier. The TGS2602 sensor has high sensitivity to organic volatile gases and meets ROHS requirements. It can be used to detect ammonia and hydrogen sulfide in home and office environments. It can also detect VOC gases such as benzene and toluene volatilized from building materials.

But special attention should be paid to the fact that in the process of use, the filter screen and filter element of the purifier must be replaced regularly, otherwise it will be like an air conditioner, which is very easy to produce secondary pollution and become a new source of pollution.