Now there are many brands of air purifier on the market. With the help of purifier manufacturers and media, the air purifier is so amazing. So, how much role does air purifier play? What technologies are used in the air purifier on the market? What are the characteristics of each technology? I believe most consumers and even franchisees don't know much about it, so I'm going to write an article here to popularize the knowledge of air purifier
At present, the main technologies of air purifier on the market are:
1、 HEPA filter + activated carbon technology
This is the main technology adopted by the air purifier on the market at present. The advantages are obvious. The physical filter has no side effects on human body, and the price is relatively cheap, and the cost of changing the filter screen is also low. HEPA filter screen is mainly used to filter large particles of pollutants in the air, and then formaldehyde, ozone, toxic chemicals and other substances are removed with activated carbon. If consumers want to buy a cost-effective air purifier, HEPA filter + activated carbon technology air purifier is the first choice
当然这类空气净化器的缺点也很明显。过滤的精度不够高， PM2.5 、雾霾等极细小的颗粒物去除的不够干净，而且这类技术的噪音也比较大，而且属于被动式的空气净化器，过滤的效果没有其它空气净化器的那么周到
Of course, the disadvantages of this kind of air purifier are obvious. The precision of filtration is not high enough, PM2.5, haze and other very small particles are not removed cleanly, and the noise of such technology is also large, and it belongs to passive air purifier, and the filtration effect is not as thoughtful as other air purifiers
Because the filter screen will release pollutants to the air and cause secondary pollution if it is not replaced in time after adsorption saturation
2、 Anion air purification technology
The concept of negative ions has been hot in recent two years. It is said that after every heavy rain, thunder and lightning, there are hundreds of millions of negative ions in the air. When you come to the seaside or trees, the air is fresh and refreshing because of the anion in the air
However, the anion in the air is mainly due to the anion generator in the purifier. By releasing the anion, the dust, formaldehyde and haze in the air are purified by ion adsorption.
Although anion air purifier has a comprehensive effect on indoor air purification, in front of ammonia, ozone, carbon monoxide and other pollutants, anion air purification technology can not achieve effective purification effect, and anion air purification technology will release ozone when it is used, which will cause intangible harm to human body to a certain extent. If the elderly and children at home Often feel dizzy headache, at this time need to detect whether the ozone emission of air purifier exceeds the standard.
3. Ozone air purification technology
The ozone in the air is mainly distributed in the stratosphere at the height of 10-50km, and the maximum value is between 20-30km. Under normal temperature and pressure, it has poor stability and can decompose itself into oxygen. Ozone has the taste of green grass. A small amount of ozone is beneficial to human body, and excessive ozone is harmful to human health. Nonflammable, pure. Oxygen changes to ozone by electric shock.
The sterilization effect of ozone air purifier is much better than that of HEPA and negative ion air purifier. However, in the process of use, a certain amount of ozone will be released during use. At present, most air purifiers do not have the function of removing ozone, which will directly discharge into the air and cause harm to human body. Therefore, there are few ozone air purifiers on the market
4. Photocatalyst air purification technology
Photocatalyst air purification technology is the most advanced and effective air purifier technology in the purifier industry. Under the action of light, photocatalyst can oxidize formaldehyde, benzene, toluene, xylene, ammonia, TVOC and other harmful organic matters, pollutants, odor, bacteria, etc. into harmless CO2 and H2O. The product has high-efficiency and broad-spectrum disinfection performance, and can effectively control the intersection of bacteria and viruses Fork infection can control bacterial reproduction and purify air. The product itself does not change or lose, and only provides a reaction site. It has the advantages of long-term, continuous action, safety and non-toxic, and does not produce secondary pollution. It is internationally recognized as a green, environmental and pollution-free product.
Safety: non toxic, harmless, safe and reliable for human body; the final reaction product is carbon dioxide, water, no secondary pollution.
Efficiency: photocatalyst can decompose the pollutants diffused in the air by using ultraviolet, sunlight, fluorescent lamp and other light sources.
Bactericidal function: it can kill and inhibit Escherichia coli, Staphylococcus aureus and other bacteria.
Deodorization function: it can remove the odor of cigarettes, toilets, garbage and animals.
Self cleaning function: it can clean the surface of indoor and outdoor objects.
Purification function: it has degradation function for organic harmful substances in sewage.