What is the effect of the air purifier in addition to aldehyde?
The air purifier was not originally aimed at formaldehyde, and the main purification target was PM2.5. Only now, the influence of formaldehyde is getting bigger and bigger, so now, as long as all the electrical appliances want to be with formaldehyde, what is the addition of formaldehyde air conditioner, formaldehyde dehumidifier…
Then let’s see if this formaldehyde removal air purifier is effective.
You can find out the description of the air purifier:
Principle of air purifier
The air purifier utilizes the principle of filtration and adsorption to remove the odor in the air and achieve the purpose of purifying the air. Its function is spectral. The main purifying objects include PM2.5, dust, animal hair, pollen, second-hand smoke, bacteria, etc. When formaldehyde does not have such a strong influence, there is no such model as formaldehyde removal. Even if there is a model other than formaldehyde, it is also activated by activated carbon to achieve the purpose of removing formaldehyde.
The results of the experimental report on the air purifier of the Shanghai Consumer Protection Committee have already concluded that the air purifiers involved in the test have an average rough calculation capacity of 30 square meters, and the purification efficiency per hour is between 8% and 97%. Larger, most of them are below 50%, which is completely incomparable with most of the PM2.5 purification levels above 90%.
Advantages of air purifiers
The reason why the air purifier is so popular is mainly that it is easy to use: plug-in and ready-to-use, long-term effective; early in the filter because of good filterability and adsorption performance, air purification is very obvious; can simultaneously eliminate various odors in the room.
But for formaldehyde, if the filter is installed inside, it is invalid. It can only be activated carbon, it will have an adsorption effect on formaldehyde, but it is the only adsorption. I want to know why everyone is apologetic in the activated carbon package, but I can’t put it down on the air purifier? Just because they are big?
The air purifier does change a disadvantage of activated carbon: it can only passively adsorb formaldehyde around the activated carbon, and there is no way for formaldehyde at a distance. However, other shortcomings are also unchanged: the adsorption capacity is weak, and it is easy to achieve adsorption saturation; after reaching the adsorption saturation, there is no effect on formaldehyde, and if the indoor temperature rises, it will cause formaldehyde desorption and cause secondary pollution. This hazard is even greater.
If it is only for formaldehyde, then I am not buying an electric fan directly to the activated carbon blowing is equivalent to empty? For the air purifier except for formaldehyde, it is necessary to change the activated carbon filter. The quality and volume of this activated carbon determine the effect of removing formaldehyde!
If you are really keen on air purifiers, then I will give you a few suggestions here:
1. If you want to choose a big name, at least the quality of the machine is guaranteed.
2. It is necessary to replace the filter element in time. After the adsorption is saturated, it is useless to formaldehyde.
3, 24 hours to open to continue purification, or open the window after opening the window and add best home air purifier for cigarette smoke for half an hour
4. Because of its limited purification area and economic capacity, buy a few more.
The main purifying object of the best home air purifier for smoke is PM2.5. Of course, there is also a certain effect of adsorbing formaldehyde, but the effect is extremely limited.
In March of this year, CCTV introduced the hazards of formaldehyde and the method of removing formaldehyde in a program of CCTV.
In the CCTV report, Zhang Yuping, director of the Building Environmental Testing Center of Tsinghua University, said: The effect of activated carbon on formaldehyde is very weak. We should use the chemical decomposition of oxidizing substances at this time, which is more effective. Purple plus black can oxidize and decompose the reducing gas formaldehyde into carbon dioxide and water, completely eliminating formaldehyde, not just adsorption. Purple plus black is made of alumina as a carrier, through special preparation techniques and complicated processes. The main features are high strength and fast effect. It is widely used in the purification treatment of toxic gas such as formaldehyde.
Director Zhang Yiping also said that the benzene series exceeded the standard and could be removed by physical adsorption. The black mineral crystal is composed of sepiolite and attapulgite (about 60%) and is made of diatom mud (about 30%) and a small amount of activated carbon (about 10%). The void density is very high and regular (more than normally activated carbon voids). The product has a large number of lattice pores less than 1 nm, and the pore surface has polarity, so it has strong active adsorption capacity for nano-scale polar gas compounds.
How to solve formaldehyde pollution in the end
If you have not yet renovated, it is best to directly engage in a two-way delivery system.
Try to install the fresh air system before the renovation. The system is basically around 20,000 yuan. The principle of fresh air is to discharge the indoor air and discharge the fresh air outside. This kind of formaldehyde removal effect is the best. If you have money, you can install one directly. It is best to choose a big brand. The fan has a long service life. The fresh air system can choose the central fresh air system, and do not choose the wall-mounted type. The wall-mounted type is subject to thickness and aesthetics, and the purification efficiency is too poor. Pay attention to the following points when selecting a fresh air system:
1, choose to have in and out
2, filter network try to choose the filter, do not recommend static electricity (easy to cause ozone exceeded)
3. Choose a fresh air system that is hot exchange
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