Can the car air purifier remove PM2.5?
The descriptions of the three-car air purifiers used in the experiment clearly stated that “fine particles of 0.3 microns or more can be removed”. So, can they remove PM2.5?
On the day of the experiment, the concentration of outdoor PM2.5 was 328 μg/m3, which was serious pollution. The car used in the experiment was a home sedan. First, open the window, let the outdoor airflow into the car, then close the window, air conditioner, and the inside and outside of the car. At this time, the initial concentration of PM2.5 in the car is approximately 227 μg/m3.
Subsequently, three-car air purifiers took turns to appear. After 20 minutes of purification, the test results will follow. No. 1 purifier with a value of 880 yuan, the PM2.5 in the car is attenuated from the initial concentration of 276 μg/m3 to 42 μg/m3, and the air quality is good; the second value is 569 yuan purifier, the PM2 inside the car .5 from the initial concentration of 274 μg / m3 to 30 μg / m3, the air quality is excellent; the third value of 150 yuan purifier, the PM2.5 from the initial concentration of 269 μg / m3 to 98 Micrograms per cubic meter, the air quality is slightly polluted.
From the data point of view, the three purifiers can remove PM2.5, which one is better? Don’t worry, let’s look at a set of data. In the absence of a car air purifier, after 20 minutes, the PM2.5 in the car naturally decays from an initial concentration of 277 μg/m3 to 124 μg/m3, and the air quality is moderately polluted. This data is very close to the result of using a 150 yuan car air purifier.
Experiments have shown that a premium car air purifier can remove PM2.5. Experts from the Building Environment Testing Center of Tsinghua University said that to get a good effect of removing PM2.5, you should choose a car air purifier with a CADR value (Clean Air Delivery Rate) of 7 or higher. The little friends who have the car learned how to choose the in-car purifier, and then quickly forwarded to the circle of friends, let more people know.
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