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source:Industry news release time:2022-02-17 Hits: Popular:aromatherapy diffuser direct sales
When purchasing an air purifier, in addition to the purifier itself, it is also necessary to consider the specific performance of the equipped filter. Some air purifier manufacturers always use the high filtration performance rating of their HEPA filters as a major selling point of their products when promoting their products. In fact, is the filtration performance level of the air purifier HEPA filter really the higher the better?
Before answering this question, let's briefly understand the working principle of the air purifier.
The main components of the air purifier are the filter screen and the motor, and the internal structure can be simply understood as that the filter screen wraps the motor in it through the specific internal structure of the air purifier. When the motor works, it will suck in the external air through the filter screen. At the same time, the filter will block most of the large particles in the air on the surface, thereby purifying the air.
Most air purifiers on the market today use HEPA filter, which is called High Efficiency Particle Air. The HEPA filters used in air purifiers on the market are mainly H11 ~ H14 grades. Among them, the 0.3μm particles have the lowest single filtration efficiency of H11, which is 95%, while the efficiency of H12, H13, and H14 are 99.95. %, 99.995%, 99.9995%.
However, you must know that the filter screen achieves the blocking and filtering of large particles of air through a large number of pores on the surface, and there are also air particles passing through the filter screen. If the filter screen hole is too small, it will be more difficult for the air to pass through. That is to say, the higher the filtering efficiency, the greater the so-called wind resistance of the filter.
It is also necessary to know that the efficiency of the motor in the air purifier is limited. When the wind resistance is greater, the motor needs more power to draw the same amount of air into the purifier, and the requirements for the motor are greater. At the same time, the efficiency of CADR It will also decrease, and it will also affect the life of the internal motor over time. This analogy is easier to understand by wearing a mask. The stronger the mask's ability to filter pollutants, the weaker the breathability, and the harder it is to breathe after wearing it.
Therefore, for air purifiers, the filtration performance of the matching HEPA filter is not as high as possible. What manufacturers need to do is to comprehensively balance the volume of the air purifier, motor performance, product positioning and filter filtration performance.
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