With the frequent and continuous appearance of haze and the improvement of people's air quality requirements, air purifiers are increasingly entering the consumer's vision. The definition of air purifier is a product that can absorb, decompose or transform pollutants in various air and effectively improve the indoor air cleanliness. The main function of the system is to remove particles, allergens and PM2.5 in the air, and can also solve the indoor volatile air pollutants caused by decoration or other reasons.
In the last two years, air purifier can be said to be "hot", many household appliances enterprises, even cross-border enterprises have entered the air purification industry, and the price of some products even changed several times a week. The products with tens of thousands of yuan are frequently used to make consumers "dazzled and fascinated". Recently, China Federation of China and local consumers' associations conducted comparative tests on 21 major brands of air purifier products sold in Beijing, Tianjin and other markets. The results showed that different products have a large difference in purification function. Some brands, even some leading brands in the industry, have not been as good as the advertising propaganda, even there are manufacturing concepts and false marketing.
In this case, many people in the industry attribute the reason to: because there is no uniform national standard in the air purifier industry, how can the product purification effect be compared with the consumers. In fact, it is not the same. Another important reason: consumers' lack of understanding of air purifier products leads to blind purchase and a major cause of market chaos.
Don't superstitious about brand and high price is the key to the purchase of "disease"
It may be the consumption concept of Chinese people for a long time. Most consumers think that the import is good and expensive is high-end in the process of purchasing. In fact, for air purifier, its product technology is not so advanced, no matter foreign or domestic, there is no big technical gap. The purchase of air purification products cannot only be based on the price and publicity. Consumers should consider the purchased products according to their environmental pollution, residential area and expected effect.
For air purifiers with different purification principles on the market, the emphasis on pollutant removal is also different.
Among them, the most popular "passive purification" is the filter screen purification. Its main working principle is to use porous filter materials, such as non-woven cloth, fiber filter paper, etc. to absorb suspended particles and toxic and harmful gas in the air, so as to achieve the effect of air purification. Currently, HEPA high-density air filter material is the most absorbent filter material, and most air purifiers will use multiple filters to clean the air comprehensively. This kind of product has a good purification effect on PM2.5, peculiar smell, formaldehyde and other harmful gases. Of course, the service life of different screens is different, and the service life of the filter screen will be different with the different environmental pollution conditions. The structure of the filter screen is different, and the price difference is also large, ranging from hundreds to thousands of yuan. Consumers should consider the later use cost when they can buy such products.
The second type of active purification, called "high precision point", is the filter free type. Its main working principle is to electrify the pollutants in the air through corona discharge, and then collect charged particles by dust collection device, and some products can release ozone and other bactericidal gases to achieve the purpose of air purification. According to the active sterilization principle of these products, it can be divided into silver ion technology, negative ion technology, low temperature plasma technology, photocatalyst technology and net ion group ion technology. These products have good purification effect on the bacteria, allergens and micro particles in the air, but the industry also holds technical questions about "secondary pollution" or "excessive harmful" of such products.
In a word, when consumers buy empty products, it is best to understand the pollutant condition of the home environment and make reasonable purchase according to their own needs. For example, the air pollution in newly decorated rooms and cars is mainly formaldehyde, benzene, TVOC and other organic pollutants. It is advisable to buy air purifier products with strong ability to remove formaldehyde and other domestic pollutants. However, for the old house, or only to deal with haze days, PM2.5, the cleaner with strong particle removal performance can be selected. If there are patients at home, the purifier should be selected to consider whether it has the function of sterilization. For all but not refined "oil" products, the most rational way is to avoid, which not only ensures the cost-effective function is not wasted, but also can ensure the purification effect.
For the friends who are buying air purifier products, the author suggests to pay attention to the "clean air quantity" index of air purifier.
In the process of purchasing, consumers will pay attention to the applicable area index of air purifier, which is not scientific. Because the applicable area of air purifier products is still to be indicated. Because the "applicable area" of the purifier is not a definite fixed value, it varies depending on the pollution degree of the room used. At present, there is no such technical parameter in relevant national standards.
Consumers can pay attention to the amount of clean air during the purchase process. Clean air quantity is a universal performance index of the world, and it is a unique and inherent performance parameter of air purifier. It has no relation with the volume of test chamber and test time. Clean air quantity refers to the rate of clean air produced by air purifier with "no specific pollutants". In cubic meters per hour (m3/h), the clean air quantity must correspond to pollutants one by one, and the amount of clean air for different pollutants will be marked respectively. Because the removal capacity of air purifiers with different pollutants is different, the corresponding clean air quantity is different naturally. This parameter can be used as the basis for your purchase before the national standard is issued.
For friends who have enough air purifier products, the author also has two suggestions.
It is important to replace the filter screen regularly for the filter screen air purifier. The filter screen will not be replaced for a long time, not only can not purify the air, but also become the indoor air pollution source. The service life of different screens is different, and the service life of the filter screen is 1 to 2 months shorter. However, the service life of the filter screen will be different according to the different environmental pollution. At present, some products of the market-owned purifier have the function of screen replacement reminder to remind users to change the screen timely. If users without this function, it is better to replace the screen regularly.
For active air purifier, air purifier will also produce some harmful substances such as ozone, ultraviolet, TVOC, PM10 while purifying air. Therefore, the product of such air purifier has certain requirements on technical maturity and perfection. When using such products, pay attention to whether there is safety or relevant certification mark.
