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How to choose air purifier

How to choose air purifier

4hw.org: in recent years, the air quality problem is imminent, and the haze is becoming more and more serious every year. Especially in autumn and winter, the haze weather is frequent. Many families will buy an air purifier, but many people make difficulties in choosing an air purifier. How to choose an air purifier? What's the common sense of the air purifier? Let's take a look with the editor!

Common sense 1. Choose the one with a large Cadr value, the bigger the better

The advantage of large air volume is very simple: the indoor air can be relatively clean only when someone drives it for 1 hour. You can achieve it in 10 minutes and breathe less unclean air for 50 minutes. Therefore, the greater the Cadr value of air purifier per hour, the better. In China with serious air pollution, this is very important.

Considering that many people don't have fresh air system in their homes, they need to open windows to put in the dirty air with high oxygen content, replace the dirty air rich in formaldehyde in the room, and then turn on the purification. This means that it is more important to complete purification in a short time. After the indoor air quality is clean, change to the medium and low level. In the case of the same output air volume, the middle and low gear of the high-volume machine is the same as the high gear of the low-volume machine, but the noise is lower.

Common sense 2. Select HEPA membrane + activated carbon filtration technology

HEPA membrane + activated carbon is an undisputed and effective filtration technology. You don't need to spend time studying the technical terms to choose them. New technologies such as static electricity are either immature or at risk of producing ozone. So, don't be confused by the filtering efficiency. Buy expensive ones.

The filtration capacity of hapa membrane need not be too strict, because the effect logic of air purifier and fresh air is different. Assuming that the filtration capacity of fresh air is 90%, you can only enjoy 10% clean air. If the filtration capacity is 99.99%, you can enjoy 0.01% clean air, because fresh air is only filtered once and delivered to you, and the air purifier is "repeatedly filtering indoor air", which means that 90% clean rate (generally the actual effect of qualified domestic hapa membrane is not less than 95%) is only 99.99% (this efficiency The machine is very expensive) if the purifier runs for 10% more time, it can achieve almost the same cleanliness (rough calculation, actually taking into account the dead angle of circulation efficiency and other factors), or if the air volume is 10% larger, it can achieve the same effect. So it is not cost-effective to pay twice or even several times the purchase cost for 99.99% clean rate.

▲ the price of consumables varies greatly. Do not make the air purifier affordable or not affordable

Common sense 3. Combined with the calculation of purified air volume, select the one with low machine and consumables

The basic structure of HEPA air purifier is filter + fan, which is simple in structure. It's OK to choose a famous brand for several years. The so-called new technology, complex structure, advanced appearance, foreign imports, etc., bring slightly higher filtering capacity and unnecessary cost, thus increasing the profit space for businesses. Is the service life and effect of the big brand entry-level product with 600 yuan and the expensive product with 3000 yuan of the same air volume five times worse? It is suggested to consider the price of the machine and the price of the consumables, combine the air volume and the size of the filter screen (dust capacity), choose the one with the highest cost performance and the lowest price, buy several more sets for comprehensive protection.

Common sense 4. Select famous brands

Just because it is cheap to choose, so to choose a famous brand, the material is generally reliable, especially the motor. At the same time, there will be good after-sales guarantee and normal product quality -- don't expect too much in terms of quality. The air purifier belongs to the auxiliary transitional product (fresh air is the ultimate necessity), and all brands are stepping up the replacement, expecting 10 years is unnecessary.

Common sense 5. Choose the one with low noise

Because it's on every day, the lower the noise, the better. And noise is also an important indicator to measure the technical level and material quality of manufacturers. Due to lack of experience, Internet manufacturers often have poor first generation products here. However, if the standard air volume is too large and the air reaches the standard, the noise will be significantly reduced.

Maintenance of filter purifier

1. The front filter screen (generally the back cover of the case) will gather some dust after a long time of use, which will affect the air inlet and the effect of air purification. Therefore, it is necessary to use a vacuum cleaner to absorb the dust, or use a rag to clean, or even wash.

2. Filter screen, part of the filter screen needs to be exposed to the sun regularly, so as to maintain the purification efficiency, such as activated carbon filter screen.

3. Deodorization filter screen, the deodorization filter screen of a few brands of air purifiers, in order to achieve the technical level of washability, can be washed by water, that is, to maintain the purification efficiency and extend the period of changing the filter screen.

4. The ion generator is generally built-in and does not need to be cleaned. Good ion generator has high working efficiency.

Dust filters or dust collecting plates in air purifiers should be cleaned regularly. They are cleaned once a week. After washing and drying, the foam plastics or plates are cleaned and dried to keep the airflow open and hygienic. When there is a lot of dust on the fan and electrode, it shall be removed and generally maintained once every half a year. The dust on each electrode and wind blade can be removed by long hair brush. When the air purifier is not used, it shall be cleaned and put into the packing box and stored in a ventilated and dry place. At ordinary times, attention should be paid to moisture-proof, so as not to reduce the use efficiency or damage due to dampness.