Commonly used filter materials for air filters include: nylon primary filter, PP cotton, activated carbon filter, HEPA high efficiency filter, etc. The main function of coarse filter is to filter hair, and other large particles of pollutants. The main role of the coarse filter is to filter hair, and other large particles of pollutants, PP cotton; activated carbon filter is mainly used to adsorb odours, deodorization, etc.; HEPA high-efficiency filter can be filtered 0.3 micron solid particles of pollutants, aerosols, and even part of the microorganisms such as bacteria or fungi. For air purifiers, the filtration effect mainly depends on the filter's good or bad, so you need to clean or replace the filter material on a regular basis and in a timely manner. So how often is it appropriate to change?

      First of all, for nylon coarse filter, PP cotton, most of which is washable, that is, in the use of a month or two months, or even longer, you can directly remove it, and then water hydrogen can be attached to the surface of the dust, hair and other pollutants can be cleaned up to be loaded back to use, usually about a year of use need to be replaced to ensure that purification effect. Of course, the specific replacement time should be based on the specific use and aging to determine the situation.

How long does the air filter change

      Secondly, for the activated carbon filter, can be placed in the sun under the sun 2 ~ 4 hours to restore the adsorption function of activated carbon, usually the activated carbon filter cycle between 0.5 ~ 1 year. The main function of the activated carbon filter is to adsorb odours and smells in the room, including odours from the toilet, kitchen and formaldehyde emitted from furniture such as sofas or wardrobes. Activated carbon adsorption is limited, if the poor quality of the environment is very easy to reach saturation, although the air purifier work has been the formation of airflow, air circulation, activated carbon filter is often dry (except for the environment of the humid indoor air), but the indoor temperature is low to promote the activated carbon is difficult to release adsorbent (and the release of adsorbent indoors will result in the secondary pollution of the indoor air), so regular one week, two weeks, three weeks! ...... and other time will be placed in the activated carbon as an open place sun exposure, is conducive to improving the adsorption of activated carbon filters, while not causing secondary pollution of the indoor air environment. Of course, if necessary, timely replacement of new activated carbon filters.

      Again, for the HEPA filter, which is a fibre structure, such as mite dust, pollen, germs, second-hand smoke, dust and other small particles purification efficiency of more than 99.9%, and even for the 0.3 micron particles purification rate of more than 99.9%. Purification effect is good at the same time, but also face the problem of cleaning or replacement frequency faster, most of the current air purifier HEPA is folded layered structure, meaning that its unfolding area and air contact area increases. In general, HEPA filters also need to be cleaned once a week, two weeks, three weeks ...... and other times on a regular basis, and the way to clean up the HEPA filter is usually to use a hoover, hairdryer and other tools to remove the pollutants attached to its surface. In general, the service life of the HEPA filter of the air purifier is between 0.5 and 1 year, and it may need to be replaced more frequently if it is often smoked indoors and affected by outdoor dust and other particles.

      Specific judgement method: if you take apart and look and find that the purifier cartridge has turned black, or gently touch with your hand, you can see the obvious dust off, it is time to change the core. In addition, use the air purifier indoors for about 10 minutes, if the indoor air quality does not improve more significantly, then you need to clean the filter system or replace it with a new one.