Since the 1980s, indoor air purifiers have undergone continuous improvement. After the first and second generations, the purely physical removal of suspended solids and dust from indoor air has produced third-generation products. There have been significant improvements in the function of removing indoor harmful gases. In recent years, some professional models have adopted advanced nanotechnology to make high-efficiency catalytic and photocatalytic purification technologies. Decomposes a variety of harmful gases and chemicals into harmless and odorless substances under normal temperature and pressure, and with the well-developed particulate material (such as high-density fiber filtration layer HEPA), it can effectively remove as low as 0.3mm. The suspended particles (human hair 1/300 diameter) have been transformed from the simple physical adsorption to the simultaneous chemical decomposition, and the type and efficiency of the pollutant removal are improved, and the second pollution is not caused. The catalytic material has a service life of 20 times that of ordinary materials, greatly reducing the cost of using consumables, and is the most ideal air purifier component. The main ways in which today's air purifiers purify include:

 

1. High density particulate air filter (HEPA Filter)

 

The HEPA filter layer is recognized as the most efficient air purification material in the world. It can absorb dust as fine as 0.3 micron in the air (about 1/300 of the hair dust in the filter, and the efficiency is up to 99.97%. At the same time, bacteria larger than 0.3 microns can be blocked to reduce the amount of bacteria in the air.

 

2. Ultraviolet germicidal lamp Ultra-Violet (UV) Lamp

 

Mainly divided into UVC Lamp for bacteria and viruses and UVV Lamp for deodorization. Ultraviolet light can change the DNA of bacteria, preventing them from reproducing normally, and the amount of airborne bacteria is slowly decreasing.

 

3. Photocatalytic Photo-catalysis Type

 

Mainly for harmful chemicals, bacteria and viruses. Mainly with "light" - generally UV light

 

4. Activated carbon filter Actived Carbon Filter

 

Mainly for odor and harmful chemicals, but when used for a period of time, its own material will be saturated with "Saturated", the effect will disappear and need to be replaced

 

5. Electrostatic dust collector Electrostatic Chamber

 

For soot, secondhand smoke and ultra-dust, less than 0.01 microns (about 1/10,000 of hair size). It can basically kill all bacteria and viruses at the same time, make it carbonized, and more effectively remove soot and second-hand smoke.

 

6. Release negative ions Negativeion

 

Negative ions are produced by decomposing oxygen in the air by high pressure corona. Some people think that negative ions are "vitamins in the air", which have the effect of promoting metabolism and relieving tension. But what is certain is that when the negative ion content in the space is moderate, the air in the indoor space will be fresher, just like in the suburban environment. In addition, negative ions also have a dust collecting effect, but the efficiency is not large; and negative ions must be evenly distributed into the air by means of the wind to play a role. The older generation of negative ion releasers have a greater chance of generating ozone, causing secondary pollution.