How to choose an air purifier filter?

Before purchasing, you should clarify two purchasing goals. One is to determine what the main pollution source in the home is, whether it is pollen, dust, PM2.5, PM0.3, smog and other physical pollutants? Or formaldehyde, benzene, toluene, xylene, Chemical pollutants such as VOC? Or biological pollutants such as bacteria, viruses, molds, fungi, insects and mites? Choose an air purifier with a matching amount of air cleansing.

Purification technology: Purification technology is the primary factor that should be considered when purchasing an air purifier. The current purification technology includes the following four categories: Physical filtration, represented by activated carbon and HEPA filter technology, is currently the safest and most efficient filtration method ; chemical decomposition and filtration, represented by photocatalyst and cold catalyst technology, can decompose harmful gases while purifying; ion technology, represented by negative ion and silver ion technology, can sterilize and effectively purify the air; electrostatic dust collection mainly adopts electronic The way of dust collection will generate ozone and bring secondary pollution.

Summary: You should choose air purifiers that apply three major technologies: physical filtration, chemical decomposition filtration, and ion technology. Physical filtration technology is the first choice. In order to ensure the purification effect, try to choose air purifiers that use multiple purification technologies; avoid choosing An air purifier using electrostatic dust collection technology.　　

Filter grade: different filter grades, the purification effect is very different. The higher the grade of the HEPA net, the smaller the diameter of the particles that can be filtered, and the better the filtering effect. At present, ordinary air purifiers on the market use H10H9-level HEPA nets, mid-to-high-end air purifiers generally use H12-level HEPA nets, and very few high-end air purifiers use H13-level HEPA nets. The H13 grade HEPA filter is the top imported medical-grade Cleansing Soft HEPA filter with the best filtering effect. Therefore, you should at least choose an air purifier with a HEPA net level above H12, and try to choose an air purifier with an H13 level HEPA net if possible.

Air cleanliness: The larger the air cleanliness (CADR), the larger the purification area of the air purifier, and the more purification cycles. The international standard is 5 cycles per hour. For example: there is an air purifier with a clean air volume of 450m3/h, calculated as a room with a height of 3 meters, the applicable area of the air purifier is: 450÷5÷3=30 square meters. When purchasing, you should consider whether the clean area of the air purifier matches the room area. If the clean area is smaller than the room area, the expected cleaning effect will not be achieved. Therefore, you should try to buy an air purifier with a large air cleaning capacity.

Purification efficiency: The one-time purification efficiency of the product = (the number of particles at the air inlet − the number of particles at the air outlet)/the number of particles at the air inlet. The one-time purification effect can intuitively see the quality of the product and the purification effect. In addition to considering the one-time purification efficiency, consumers should also consider the purification efficiency of the whole machine, that is, the amount of air cleanliness, otherwise they will easily fall into the trap of the merchant: for example, to purify the same volume of air, the one-time purification of two purifiers The efficiency is 99%, but it took 1 hour for purifier A, and 2 hours for purifier B. Obviously, the purification efficiency of A is higher than that of B, but the merchant did not mark the parameters of the test, and what you see is all 99% purification rate.

In addition, air purifiers have different efficiencies in removing PM2.5 and removing formaldehyde, so the values of the two should be considered comprehensively when purchasing. Finally, it should be considered that the values of purification efficiency are all tested in the manufacturer's specific experimental environment. Since the indoor air environment is different from the laboratory environment, consumers should not blindly listen to the manufacturer's false standard values when purchasing, but must See if the effect really works.

Real-time display of PM2.5 value: Some air purifiers on the market cannot display the content of PM2.5 in the air, and some can roughly use "excellent, good, medium, poor" to display, there are very few high-end air purifiers It can display the precise value of PM2.5 in the air in real time, and users can intuitively see the changes of indoor air quality.

Body structure: At present, the air inlet and outlet methods of the air purifier are mainly divided into: air in from the back and air out in the front: this way is easy to blow up the dust on the floor and aggravate the dust in the indoor air; air in from below or behind and out from the top: this This method can absorb the dust on the floor into the air purifier to purify it and blow out fresh air from above to play the role of "cleaning the floor", especially if there is a baby at home, the baby likes to crawl on the ground, and more attention should be paid to floor hygiene.

Safety—Secondary Pollution: Air purifiers using electrostatic dust removal and pure negative ion technology will produce ozone, which is often said to be the problem of secondary pollution of air purifiers. A certain amount of ozone can kill bacteria and viruses, and decompose gaseous pollutants, but excessive ozone is harmful to the body, affects the lungs, causes asthma, and can seriously cause cancer. At present, the safest and most efficient technologies are HEPA net technology and activated carbon technology. Both electrostatic dust removal and pure ion technology will generate ozone. When purchasing, you should choose an air purifier that uses HEPA net filter and activated carbon technology.

Noise problem: Noise problem is a problem that is often encountered during the use of air purifiers. When purchasing, the noise problem should be mainly considered from the following three aspects: whether the sleep mode can really achieve ultra-quiet; the maximum air volume Whether the noise generated during operation can be tolerated; whether the noise in automatic mode is acceptable. Some purifiers use DC brushless ultra-quiet motors and additional silent cotton technology, which can effectively reduce noise. When purchasing, you can give priority to air purifiers that have adopted these two quiet technologies.

Power consumption problem: Under the same purification effect, the smaller the power of the air purifier, the less power consumption. In addition to the power, some air purifiers have an automatic mode, which can automatically adjust the air volume according to the indoor conditions, so as to achieve the purpose of saving electricity and prolong the service life of the filter. When purchasing, you should try to choose an air purifier with an automatic mode. device.

In addition to technical indicators, when purchasing an air purifier, you should also consider the problems you will encounter during use. First of all, it depends on whether the design is humanized and whether the operation is simple and convenient. Some people buy an air purifier as a gift to their parents. I will not use it, so whether the design of the air purifier is user-friendly is also a factor that should be considered when purchasing. Some high-end air purifiers have a visual screen, and you can directly see the value of PM2.5. It is simple and convenient, and there is a child lock Designed to prevent children from improper operation, very user-friendly. Secondly, we must consider the problem of filter replacement and after-sales service.

The above is the trilogy of choosing an air purifier introduced to you. Air purifiers allow you to enjoy fresh and healthy air. When purchasing an air purifier, you can choose the most suitable air purifier for you by following the above steps. Let's cheer for a healthy life together!