Daniel
Member
In recent years, various manufacturers have highly valued the CADR value of air purifiers. But CADR value is not the most important indicator. The air purifier is not a disposable item. Buy it back and use it for one day / one week / one month. After using it for a period of time, the pollutants accumulate on the filter screen, the wind resistance increases, the fan layer may also be polluted, and the air volume decreases. Therefore, the real test is: how long the filter has been used for several months, how much will the purification capacity of the purifier weaken when it expires, and will it even cause pollution leakage and secondary pollution; after a few years, the fan layer ’s The fan will not have pollution and wear and tear, and still provide strong wind power to support the CADR value to maintain a high value; such extreme conditions cannot wait to be judged from the CADR value.
CADR includes particulate matter CADR (detection of PM0.3 and above particulate matter), formaldehyde CADR (detection of formaldehyde), TVOC CADR (detection of TVOC), so gaseous pollutants can be judged by the CADR value of formaldehyde and TVOC, but even three CADR values are considered. PM0.03, PM0.1 and other very fine particle pollutants less than PM0.3 really cannot be judged from the CADR value. Of course, these pollutants are also harmful to the human body.
In addition to the CADR value, what indicators should the air purifier follow?
1. CCM is the cumulative purification amount. The purifier can purify the total amount of pollutants in a filter cycle. The higher the CCM, the more the amount of purification, the longer the life of the filter. The value of CCM is actually the same as CADR. There is a bit of conflict. To maintain a high CCM value, it is necessary to ensure that the filter is thick enough. If the filter is too thick, the wind resistance will increase. If the wind resistance increases, the CADR value will become smaller. This is also a real test of the R & D strength of the business. The CCM standard is divided into 4 levels P1, P2, P3, P4 / F1, F2, F3, F4, but P4 does not mean that the maximum value is reached, and it can be further improved on the basis of P4, it can be said that P4 / F4 Just a basic value, don't be fooled by the standard P4 / F4.
2. Filter: In the case of ensuring CADR and CCM values, the higher the highest grade of the filter, the better.
3. Product structure
The structure of the purifier is actually not obvious at the initial stage of purchase and use, and the effect is long-term. A good structure can allow the fan to run longer and the purification effect can be maintained for a long time. Particles, and no secondary pollution occurs. For example,
There is no protection for the fan, leaving the fan exposed to dirty air, long-term use will greatly reduce the service life of the fan and reduce the purification efficiency;
Without rigorous air duct design, the polluted airflow does not necessarily pass through the filter, it may pass through the gap between the filter and the machine;
The filter runs for a long time. Once the fan is blocked and the fan continues to work, the wind will enter from the air outlet. The air entering the air outlet does not pass through the purifier, so the entire body is polluted.
4. Sealing design: The tightness of the purifier affects whether there is secondary pollution and noise.
5. The purification technology used
Looking at purification technology, do not have some technical means that will produce other pollution. At present, pure physical purification is the most effective and safest technology.
In addition to these hardware indicators, there are other indicators:
Brand: The quality of a brand determines the quality of the products you buy and the guarantee of after-sales service. Now many Internet companies in the market come to sell air purifiers, and many do not have a research and development background. They only use Internet thinking to sell goods, and they lack the control of product quality. Brands such as Panasonic, Philips, Blueair.
Consumer Demand: To see what your needs are, the demand can also be divided into several categories: 1) decoration except formaldehyde 2) poor air quality, except PM2.53) indoor air pollution, more bacteria and viruses According to different user needs, major brands will produce corresponding products, just compare the parameters to find it.
CADR includes particulate matter CADR (detection of PM0.3 and above particulate matter), formaldehyde CADR (detection of formaldehyde), TVOC CADR (detection of TVOC), so gaseous pollutants can be judged by the CADR value of formaldehyde and TVOC, but even three CADR values are considered. PM0.03, PM0.1 and other very fine particle pollutants less than PM0.3 really cannot be judged from the CADR value. Of course, these pollutants are also harmful to the human body.
In addition to the CADR value, what indicators should the air purifier follow?
1. CCM is the cumulative purification amount. The purifier can purify the total amount of pollutants in a filter cycle. The higher the CCM, the more the amount of purification, the longer the life of the filter. The value of CCM is actually the same as CADR. There is a bit of conflict. To maintain a high CCM value, it is necessary to ensure that the filter is thick enough. If the filter is too thick, the wind resistance will increase. If the wind resistance increases, the CADR value will become smaller. This is also a real test of the R & D strength of the business. The CCM standard is divided into 4 levels P1, P2, P3, P4 / F1, F2, F3, F4, but P4 does not mean that the maximum value is reached, and it can be further improved on the basis of P4, it can be said that P4 / F4 Just a basic value, don't be fooled by the standard P4 / F4.
2. Filter: In the case of ensuring CADR and CCM values, the higher the highest grade of the filter, the better.
3. Product structure
The structure of the purifier is actually not obvious at the initial stage of purchase and use, and the effect is long-term. A good structure can allow the fan to run longer and the purification effect can be maintained for a long time. Particles, and no secondary pollution occurs. For example,
There is no protection for the fan, leaving the fan exposed to dirty air, long-term use will greatly reduce the service life of the fan and reduce the purification efficiency;
Without rigorous air duct design, the polluted airflow does not necessarily pass through the filter, it may pass through the gap between the filter and the machine;
The filter runs for a long time. Once the fan is blocked and the fan continues to work, the wind will enter from the air outlet. The air entering the air outlet does not pass through the purifier, so the entire body is polluted.
4. Sealing design: The tightness of the purifier affects whether there is secondary pollution and noise.
5. The purification technology used
Looking at purification technology, do not have some technical means that will produce other pollution. At present, pure physical purification is the most effective and safest technology.
In addition to these hardware indicators, there are other indicators:
Brand: The quality of a brand determines the quality of the products you buy and the guarantee of after-sales service. Now many Internet companies in the market come to sell air purifiers, and many do not have a research and development background. They only use Internet thinking to sell goods, and they lack the control of product quality. Brands such as Panasonic, Philips, Blueair.
Consumer Demand: To see what your needs are, the demand can also be divided into several categories: 1) decoration except formaldehyde 2) poor air quality, except PM2.53) indoor air pollution, more bacteria and viruses According to different user needs, major brands will produce corresponding products, just compare the parameters to find it.
