A good air purifier, to a certain extent, can purify most of the harmful particles in the air, can really achieve the effect of clean air. However, we need to know the selection criteria of air purifiers first. First of all, the air purifier is good or bad, mainly from the output ratio of clean air to consider, the greater the output rate, the purification effect will naturally be better.

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Standards for air purifiers

First, to ensure that indoor air to a certain number of ventilation, the current international standard is not less than 5 times;

Secondly, the primary purification efficiency of the air purifier should be high. If there are continuous indoor pollution sources, the two indexes can keep indoor pollutants at a relatively low level.

It is recommended to choose air purifiers with larger air volume. Especially in the filter air purifier, there is a fan as the energy source of the air circulation system, because the air volume is large, the filtering effect and purification capacity are relatively large.

What are the problems in choosing air purifier?

(1) purification technology

Consumers should choose the air purifier which uses three kinds of technology: physical filtration, chemical decomposition filtration and ionic technology. Physical filtration technology is the first choice. In order to ensure the purification effect, the air purifier which adopts multiple purification technology should be chosen as far as possible, and the air purifier which uses electrostatic precipitation technology should be avoided.

(2) filter material

The effect of purification is very different from the material of different screens. The higher the HEPA network is, the smaller the diameter of the filtered particles is, the better the filtration effect will be. At present, the HEPA filter screen made of antimicrobial peptides is very efficient in purifying energy.

(3) air cleanliness

The larger the air purifier (CADR), the larger the purifier area of the air purifier and the more times of purification cycle. International standards are 5 times an hour. When choosing and purchasing, we should consider whether the clean area of the air purifier matches the room area, and try to choose the air purifier with a large amount of clean air.

(4) purification efficiency

The one-off purification efficiency of the product is equal to the number of particles in the air inlet and outlet / the number of particles in the air inlet. The one-off purification effect can directly see the quality of the product and the purification effect. Consumers should consider not only the one-off purification efficiency, but also the whole purification efficiency, that is, air cleanliness.

(5) PM2.5 numerical real-time display.

Some air purifiers on the market can not show the PM2.5 content in the air, some can be roughly displayed with "excellent, good, medium, poor" to show, there are very few high-end air purifiers can real-time display the precise value of PM2.5 in the air, users can very intuitively see the changes in indoor air quality.

(6) body structure

At present, the air inlet and outlet modes of air purifiers are mainly divided into:

Back in front of the wind: this way is easy to blow up the dust on the floor to aggravate the dust in the indoor air;

Below or behind the air in and out of the upper air: this way can be dust on the floor into the air purifier to clean up after blowing fresh air from above, play a "clean the floor" role, especially in the home with babies, babies like to climb on the ground, more need to pay attention to floor hygiene.

(7) safety and eradicate the two pollution.

Air purifiers using electrostatic precipitation and pure anion technology produce ozone, which is often referred to as secondary pollution of air purifiers. Certain ozone can kill bacteria, viruses, decomposition of gaseous pollutants, but excessive ozone is harmful to the body, affecting the lungs, causing asthma, serious cancer. At present, the most safe and efficient technology is HEPA network technology and activated carbon technology, electrostatic precipitation and pure ion technology will produce ozone, should choose to use HEPA network filtration and activated carbon technology in the purchase of air purifier.

(8) noise problem

Noise is a common problem in the use of air purifiers. When choosing and purchasing, we should mainly consider the following three aspects: whether the sleep mode can really achieve super silence; whether the noise generated by maximum air volume can be tolerated; and whether the noise in automatic mode can be tolerated. Some purifiers use DC brushless super quiet motor and additional silent cotton technology to reduce noise effectively.