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Air Purifier Buying Guide

Air Purifier Buying Guide


In order to prevent and control air pollutants, it is imminent to buy an air purifier. There are four air purifiers with different purification methods on the market. Which one should we choose? The editor wants to say that each of these four has its own advantages and disadvantages, and the most important one is the right one.

The use of activated carbon, diatom mud and other substances with a large specific surface area can filter free organic substances such as formaldehyde, which itself will not bring secondary pollution, but its disadvantage is that any filtering effect has a saturated state, which is related to the temperature of the environment. It is related to humidity, and the desorption process will occur when it is in a saturated state, and it should be replaced in time. Due to the long release time of formaldehyde in some materials, which may take several years, the replacement process will be cumbersome.

2. Chemical decomposition filter

The negative oxygen ions generated by photocatalyst catalysis are used to oxidize and decompose pollutants into harmless water and carbon dioxide to achieve the purpose of eradication. The advantage is that it is safe, non-toxic and harmless, long-term effective, completely avoids secondary rebound and secondary pollution, and has the effect of sterilization and anti-virus.


The disadvantage is that it requires the participation of light, and places with poor light or no light need the participation of auxiliary light. And due to the catalytic efficiency, the time here is relatively long in some seriously polluted places, and those who are eager to move in will have a certain impact. Ozone will be generated during use, which is harmful to human health. People must stay away from the scene when using it.

3. Ion technology

Using the principle of ionization, the air is ionized with metal electrodes, the gas containing positive and negative ions is discharged, and the charged particles capture pollutants, or make them fall or separate them. However, although charged particles can cause pollutants to settle, the pollutants are still attached to various surfaces indoors, and they are easy to fly into the air again, causing secondary pollution. At the same time, ozone will be generated during the ionization process. Although it is generally not exceeding the standard, it is still a potential risk.

4. electrostatic dust collection

Ozone is generated by high-voltage static electricity, and it has the effect of storage and sterilization without nourishing itself. The efficiency of using ozone to remove viruses is relatively high. The disadvantage is that the concentration of ozone is not easy to control, the concentration is too high to harm the human body, and the concentration is too low to achieve the effect of disinfection.


To sum up, the editor recommends physical filtration. Although the frequency of replacement is more frequent than other purification methods, it does not bring any secondary pollution by itself, and is relatively safe, reliable and efficient.

Post time: Jun-18-2022