How to choose an air purifier? And the working principle of air purifier

Let's first understand how air purifiers work，Generally speaking, an air purifier consists of a fan and an air filter system. There are many types of air purifiers with various functions on the market, and the working principles of different air purifiers are also different. and double purification

1. Passive adsorption filter

The working principle of this kind of air purifier is to draw the air into the machine through the fan, and then go through the net effect. The filter inside the carburetor filters the air, and then achieves the effect of sterilization, filtering and absorption of dust, PM2.5, formaldehyde and other harmful gases. There are also many types of filters, such as dust collection filters, formaldehyde removal filters, HEPA filters and so on.

Among them, the cost of the HEPA filter is the highest, and its corresponding ability to filter particulate matter is the best, and it can decompose toxic gases, and can also play a sterilizing effect to prevent secondary pollution of the air.

2. Active release purification

This working principle is not limited to fans and filters. It is different from the working principle of passive adsorption and filtering, which passively purifies the air entering the purifier, but actively releases a large number of purification and sterilization factors into the air through the built-in machine. , and then purify the air in the whole room.

There are many technologies for purifying and sterilizing factors on the market, such as negative ion technology, photocatalyst technology, silver ion technology and so on.

3. Double purification

The working principle of this double purification is actually a combination of passive and active purification. On the one hand, it can purify the polluted gas in the air through the filter, on the other hand, it can also actively release a large amount of Bacterial factors play a role in purifying the air in two aspects.

Why do ordinary families buy air purifiers? Generally speaking, there are several reasons for

1 Smog, PM2.5 exceeding the standard

2 The home is newly renovated, and the TVOC represented by formaldehyde exceeds the standard

3 Troubled by allergens such as pollen

4 were double-polluted by particulate matter and peculiar smells on the side of the road and in the factory area

Especially those with elderly, pregnant women, and children at home are more sensitive to the above problems. Do you need to buy an air purifier in these cases? It is necessary, it is necessary.

Smog and pollen are all particulate matter, so you need an air purifier with strong ability to remove particulate matter. Only by choosing the right purifier can you take this first step. If a worker wants to do a good job, he must first sharpen his tool, so how to judge the ability of a purifier to remove particulate matter? What should you pay attention to when choosing an air purifier?

Principle 1: CADR is the only measure of an air purifier's ability to remove particulate matter

Principle 2: Air purifiers should not be tractors

Does the machine with larger air volume make more noise? Not really. Generally speaking, the higher the speed, the louder the noise, but this has a lot to do with the fan selection and structural design. The fan is the core component of the air purifier, which is equivalent to the human heart. A powerful fan not only has strong performance, but also uses many patented technologies to reduce noise. In addition, rigorous structural design is also of great significance to noise control. Many air purifiers with similar styles and the same fans often have very different noises, because the effort spent on structural design and the problems solved are different. Therefore, in terms of noise control, the selection and structural design of the fan are very important, so the air volume cannot be judged based on the noise of the sense of hearing, but depends on the test report of each product. Now the new national standard uniformly requires businesses to mark the sound power level noise, From the perspective of e-commerce platforms, several brands that sell well have been updated to sound power levels. However, it is also found that some new fan manufacturers are marking the sound pressure level (the sound pressure level value will be lower), which confuses the concept and needs to be clearly identified.

Principle 3: Functions you think are healthy may be more dangerous

Principle 4: Do not expect air purifiers to remove formaldehyde first

Principle 5: Can use, can be useful

The purification principle of the air purifier is fan + filter paper, and now add one, which should be used in a confined space. In a closed space, a fan with a large air volume stirs the indoor air, allowing the indoor air to pass through the filter paper at a high speed, which is purified by the filter paper, and the particles are captured by the filter paper.

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