There are some empty net products on the market that are very good at noise control, but it also raises people's doubts: These empty nets have almost no sound when working in low-end jobs. Are they really purifying or pretending to work?
In order to solve these doubts, we will come to verify today, whether the low-end empty net products can really guarantee the purification efficiency, and the necessity of talking about the low-end position.
Whether the mute file is working or not, and why do we need to mute files?
Next we will start testing in a room with a closed door and window and a size of 20m3. Turn on the air detector as the three cigarettes burn out and the tester is about to suffocate. The PM2.5 value on the instrument screen soared to 200+, then the machine mute file was turned on to start the purification work.
It can be seen that even in the air purifier with silent position, the purification rate after opening is very impressive: PM2.5 is reduced to less than 100 within 10 minutes, and the current air quality has been controlled after 20 minutes. Below 35, which is the safety air quality recommended by the Chinese Health Organization. After half an hour, the air quality in the room was well controlled, reaching the safe range of 10 recommended by WHO.
The empty net working noise of the mute mode is almost the same as the ambient noise.
Although the air purifier at this time is working, I may not be able to notice its existence if I don't see the light. In fact, the mute file and the low gear are the most suitable gears for daily life, because the air purifier purification efficiency of the extreme gear is impressive, but the noise of the shoulder saw is far away.
Whether it's working, sleeping or watching TV, minor disturbances can be distracting, and it's only a luxury to focus on and invest in big decibel noise.
The motor is an important factor in controlling noise
In order to control the working noise of the air, it is necessary to optimize the design of the body structure, air intake mode, motor and filter screen. The air used for testing is a double-sided air intake structure. The excellent motor and internal structure ensure that it can handle the balance between noise and air volume. This is why we forget its existence when we turn on the mute file. But it is indeed purifying the air, and it is doing very well, keeping PM2.5 below 10.
Some people may have doubts. Does the Chinese health organization recommend that the PM2.5 value be below 35 as a safe value? The air quality value of the city has reached the standard. Why should we insist on reducing PM2.5 to 10?
Why does the South, which has better air quality, need an empty net?
WHO has set very strict PM2.5 standards for countries, and most cities in the world have failed to meet this standard. For developing countries, WHO has also developed guidelines for three different stages, and as a developing country, China's PM2.5 standards have been relaxed, which is why two different numerical standards appear. .
However, even if the PM2.5 concentration is controlled at 35, air pollution is still harmful to the human body. The WHO believes that only when the PM2.5 value drops below 10, the impact of air pollution on human health will eventually reach zero, and people will live about 35% in the PM2.5 environment for about 35%. Risk of death.
This may be a bit horrible, but to be sure, the PM2.5 of 35 is not a good enough value. You can't predict how much damage a low concentration of air pollution can have on your body, but you can avoid risk in advance.
Therefore, it is completely wrong to think that only the smog and explosion table needs to pay attention to the air pollution problem. If you live in the hot north, the resident air purifier is the first element of life-saving; if you live in the south with better air quality, you don't have to be too optimistic because there is still a distance from the safety figures recommended by WHO. Put an empty net in the bedroom to at least ensure that the air you breathe in at rest is healthy and fresh.
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