Is the air purifier useful?

Under the current strict national standards, air purifiers treat pollen; pm 10； PM2.5 secondhand smoke; Allergen; Viruses; Bacteria; Smell, etc. It has played a very good purification effect. However, the air purifier is still not the best choice in reducing the concentration of formaldehyde in the air.

The principle of purifying formaldehyde by air purifier is to add a layer of activated carbon filter screen on the air purifier. After the gas containing formaldehyde is inhaled, formaldehyde molecules will attach to the activated carbon filter, and the formaldehyde concentration in the released air will decrease. But this is only attached to the filter screen, and formaldehyde molecules have not really decomposed. If the filter meets high temperature, formaldehyde molecules can easily fall off again and circulate back to the air.

In addition, the activated carbon filter can not only absorb formaldehyde molecules, but also absorb other molecules such as water molecules. After a period of use, the filter element will reach saturation state, and it is impossible to continue to reduce the formaldehyde concentration. The cost of replacing the filter element is not low. Therefore, air purifier is not the best choice to reduce formaldehyde concentration at present.

Then, after the renovation of your house, what methods can better reduce the concentration of formaldehyde?

First, open the window to ventilate.

In places with good air quality, you can choose to open windows and convection ventilation to discharge formaldehyde molecules outdoors and reduce the indoor formaldehyde concentration.

Second, the fresh air system

If the local air quality is poor, fresh air system can also be chosen as a means to reduce formaldehyde concentration.

The function of fresh air system is to discharge indoor air to the outside, filter the outdoor air and input it into the room, and constantly update the indoor air. In this process, formaldehyde molecules in the air will be continuously discharged outside by the fresh air system, and fresh air will be input to reduce the indoor formaldehyde concentration. Therefore, fresh air system is one of the main options to reduce formaldehyde concentration after house decoration.

Want to buy an air purifier as a means of purification, how should I choose?

First, look at the CADR value. The Chinese name of CADR is clean air output ratio, which indicates the purification efficiency of air purifier. The higher the value, the higher the purification efficiency.

Second, look at the CCM value. CCM means cumulative purification quantity in Chinese, indicating the service life of the filter screen of air purifier. The higher the value, the longer the service life.

Third, the noise value. The air purifier will have different CADR values and noise values under different power. Although some products have a high CADR value, they will also bring a lot of noise and seriously affect sleep. Therefore, when choosing a purifier, it is suggested that low-noise products should be preferred under the same CADR value.

Fourth, recognize the product name. According to the new national standard, products that have not passed the national standard certification cannot use "air purifier" as the product name. Therefore, products with such names as air purifier fan, air processor, air freshener and air sterilizer cannot meet the standards for air purifiers in the new national standard.

How to use the purifier to make the purification effect best?

First, it is best to put it in the center of the room to avoid the wall blocking the air outlet.

Second, if there are multiple rooms in the home, it is better to use multiple small purifiers than one large purifier. Unless a large purifier can place a PM2.5 detector in different rooms. Avoid different purification effects in different rooms.

Third, the kitchen range hood is turned on, which will make the room become negative pressure, and the turbid air outside the house will penetrate through the crack of the door and the seam of the bed. Therefore, it is recommended to close the kitchen door when opening the range hood.

Some warm tips

First, if the purifier is used in wet areas or rainy season, it is recommended to turn it on for a long time and not turn it off. In this way, the internal filter element is kept dry to avoid breeding bacteria.

Second, smaller or lower-priced filter elements are recommended to be used according to the service life recommended by the manufacturer. For larger or more expensive filter elements, you can use the PM2.5 detector to extend the service time according to the actual purification effect of the purifier.