The correct "opening method" for household air purifiers!

　　The correct "opening method" for household air purifiers!

　　Recently, the temperature has continued to hit new lows, but the low temperature has not driven away the haze. The editor deeply feels that masks can no longer solve the problem. Even if the price of air purifiers soars, one must be purchased. After all, the body is important! However, there is a lot of attention to buying an air purifier, so hurry up and do your homework! How to choose an air purifier?

　　1Choose the CARD value according to the living area

　　The main indicator to measure an air purifier is the CARD value. The CADR value represents the volume of air that can be purified per unit time. The relevant formula is purification area = CADR value x coefficient value.

　　The coefficient values are generally between 0.1-0.15. For example, the CADR value of a certain air purifier is 300, then its purification area is equal to 300x (0.1-0.15)=30-45, that is to say, it is suitable for use in a room with an area of 30 square meters-45 square meters. For now, the nominal CADR value of household air purifiers is generally between 50-600, and there are also some high-end commercial products with CADR values as high as 1,000. So before you buy an air purifier, you must find out what the CADR value of the air purifier is. This figure can generally be found in the product specification parameter table or manual. Then, you must also know the size of your home room space to achieve matching.

　　2 Look at noise issues dialectically

　　According to the working principle, air purifiers can be divided into active purification and passive purification. The active purification air purifier has an obvious defect, that is, this type of product uses a built-in fan, so there is a noise problem. Generally speaking, the noise is around 40-70dB.

　　Many air purifiers have different air volume modes, such as high, medium and low modes to choose from. In addition, some products have also added a sleep mode, the fan will be completely turned off, and the noise problem will no longer exist. For models without sleep mode, when you buy, try not to buy products with a noise exceeding 80dB. For passive air purifiers, there is usually no fan design, so the noise problem no longer exists. This type of product actively releases various ions, such as negative ions, photocatalyst, plasma purification group and other technologies. It can actively release ions, so as to achieve the purpose of purifying the air. However, everyone should pay more attention when purchasing this type of product. Due to the high technical requirements, some small-brand products may have excessive ozone emissions, so try to buy large-brand products.

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