How to be choose air purifier
Recently, the Shanghai Consumer Protection Committee issued 20 air purifier comparison test results of different samples, the huge gap between the actual cleaning ability.
Among them, the amount of clean air formaldehyde maximum and minimum difference of up to 70 times in recent years, the country and more frequently encountered invasion of haze, air quality is the topic, the air purifier is also more and more consumers of all ages. “99.95% to pm0.1 automatic purifying harmful particles” can filter out small to 0.02 micron particles “and” effective removal of formaldehyde and other harmful gases, sulfur dioxide removal efficiency is more than 99%.
The air purifier function, business promotion more and more, almost equal to anything, but the actual situation how? Let’s take a look. The comparative test of the air purifier to buy 20 mainstream brands, including 12 in the purchase of large department stores, 8 in the purchase of electric flat Taiwan, the price ranging from 699 yuan to $18600 per unit.
Clean air quantity discount
Clean air volume (Cadr) with larger values for the larger, in the same space, purifying particles faster. In our country, gb/t18801-2015< air purifier > specified in the application area = particulate clean air volume x (0.07 ~ 0.12), Shanghai local standard “applicable area = particulate clean air volume x 0.1”.
The test results showed that 20 samples of the measured particles Cadr the lowest value of 77 cubic meters / hour, up to 569 cubic meters / hour, for the minimum area of 9 square meters, a maximum of 68 square meters. But the product function of some enterprises is much larger than the nominal value and the measured value, an air purifier for nominal area 46 square meters, measured for an area of only 23 – 39 square meters.
PM2.5 purification capacity gap
The index refers to the air purifier to PM2.5 (test particle size of 0.1 mu m-2.5 mu m) purification parameters performance. The testing results show that the 20 samples of PM2.5 clean air volume up to 518 cubic meters / hour, the lowest is 69 cubic meters / hour, more than 7 times.
Formaldehyde purification ability is not satisfactory
The purification efficiency of formaldehyde in the air purifier is refers to the nominal area of, after 1 hours of operation, the removal efficiency of formaldehyde. The higher the number, the use of the same size in space, formaldehyde purification faster. Test results showed that 20 samples formaldehyde amount of clean air, the highest for 282 cubic meters / hour the lowest, 4 cubic meters / hour, 70 times the difference. An air disinfection machine nominal value was 47m m3 / h, the measured value is only 37 cubic meters / hour. The comparative test data analysis found that 17 has a nominal formaldehyde purification function of the samples, according to the t310106001-c001-2015 (apiac/lm01-2015) “with nominal gas purification ability of the air purifier, should not be less than C the purification efficiency of the measured values (C 35% ~ 50%)” requirement, the purification efficiency of grade 6 class A, B grade 7, C grade 4,
Need to buy the filter need to change
Choose according to their actual needs, and not the more the better, should choose their own products. Such as: haze prone areas can be strong purification products focus on PM2.5 particles, indoor decoration can be strong new products focus on the purification of volatile organic compounds such as formaldehyde and toluene.
Pay attention to particulate clean air volume (Cadr) and the applicable area. For each area of the air purifier should have a nominal particle Cadr and suggestions.
Suitable area generally refers to the air purifier can be achieved in the final 2.4 meters storey indoor, at least more than 80% removal of particle pollutants, can use the indoor area, can be obtained by the “nominal particle Cadr x 0.1” calculation.