Right now in the early winter, the smog weather is frequent, and "pm2.5" has begun to re-enter the headlines of various news, and all kinds of ridiculous paragraphs began to refresh in our circle of friends as always.
But I don't think it's smoggy. For the air purifier industry, smog is its "catalyst." Such understanding may be extreme, but it is true in this industry. Just as many companies are "expecting" on the day of the release of empty new products, they can cover the sun and come to him. It can also be said that the continuous ravages of smog are the main thrust of the rapid development and growth of the domestic air purifier market in recent years.
According to industry data, since 2011, the sales volume of air purifiers has increased year by year, with an increase of 465.2% in six years and a compound annual growth rate of 42.84%. By the end of 2017, the air purifier market sales will exceed 100 billion yuan. In recent years, it is precisely the years when smog began to enter our life.
At present, the smog is still the same, the fiery air purifier industry is still in constant dispute, and more and more enterprises are fancy, resulting in a mixed market. As competition continues to increase, consumers are also faced with many and endless publicity. Patterns, how to choose, and which ones are true?
Fan + filter = air purifier is really not true?
In the period when the air purifier began to rise in the Chinese market, there was a voice in the industry "air purifier = fan + filter", and even many teaching videos of DIY air purifiers were distributed online. So, is it true that the air purifier is a simple combination of a fan and a filter?
In fact, the fan and filter are indeed the two core components of the air purifier, but if the air purifier is only the case, it can not be true. Air duct design, including air purifiers, is directly related to operating noise. At the same time, the stability of the operation, the promotion of air mobility and the safety of use, the air purifier itself has many technical contents.
Lu Jianguo, director of the Institute of Testing Technology of China Household Electrical Appliances Research Institute, once dismissed this statement: Fans and filters can not form the circulating flow of air, and can not achieve continuous and effective purification, and there are still great security risks. . And an excellent air purifier is the ingenious combination of industrial design and innovative technology, but also meets the new national standard set by the state.
The bigger the CADR, the better.
When it comes to the new national standard, it is necessary to mention the core parameter of the GB/T18801-2015 "Air Purifier" national standard - CADR (clean air volume). This value is absolutely unfamiliar to those who care about the air purifier industry. More and more companies will declare how big the CADR value of their products is when they are released, even if they are not bigger or bigger.
The propaganda guidance, so many consumers think that the larger the CADR value of the air purifier represents the better, this statement is really not true?
In fact, the CADR value is indeed one of the core evaluation parameters of the performance of the air purifier. But just because of one of them, when we purchase air purifier products, we must consider the CCR value (cumulative purification amount), noise, energy efficiency level, and operation experience, etc., in addition to the CADR (clean air volume) value. And so on. In general, the higher the CADR value, the more often it is accompanied by greater noise and higher energy consumption. If the pursuit of large clean air volume does not bring a perfect experience, it is more expensive to purchase. Attention should be paid to the applicability of air purifiers to individual needs, and multi-dimensional considerations to select the right product.
It is not true that formaldehyde is removed by 99%?
In the market promotion of various air purifier products, we often see the words “a certain pollutant removal rate of 99%â€, which includes not only the main pollutant pm2.5 in smog, but also common indoor air pollutants. Harmful gases such as formaldehyde. So this statement is really not true?
Here we analyze from the purification principle of the filter air purifier. Most of the air purifier products are sucked in by the fan, filtered through the primary filter to filter out large pollutants such as dust and pollen, and then passed through. The HEPA filter filters out such fine contaminants as PM2.5, and finally absorbs harmful gases and odors such as formaldehyde through the activated carbon filter to complete the purification of the air.
For particulate contaminants such as PM2.5, the purification relies mainly on HEPA filters, ie high efficiency air particulate filters. Among them, HEPA filters also have their own "purification level", including H12, H13 and so on. According to EU regulations, filters above H13 can filter particles as small as PM0.3, and the filtration efficiency can reach 99.95%. If it is an air purifier with a high-grade HEPA filter, "PM2.5 removes 99%", this statement is reliable.
But for formaldehyde, the "removal rate of 99%" cannot be true. The first reason is that formaldehyde has the characteristics of gradually releasing to the surrounding environment. In the furniture containing formaldehyde, the longest release period can be as long as 8-14 years, which makes it impossible to open the air purifier in a short time. Complete the thorough purification. Secondly, most air purifier products are aimed at the purification of formaldehyde. It can not be said to be removed but only adsorbed. Activated carbon has only adsorption to formaldehyde in the air. The larger the adsorption capacity, the better the effect is naturally, but it is far from talking. Not "99% removal".
Filter replacement reminder and indoor air monitoring is really not true?
With the rapid development of air purifiers, many “upgrade†functions have also appeared in the industry. Such as "filter high-tech" such as filter replacement reminder and indoor air quality monitoring, isn't this kind of function really true?
To give an example, when Xiaomi just launched the air purifier product, it was deeply immersed in the "filter plastic door" incident. In general, the millet air purifier begins to calculate the life of the filter without unpacking the filter plastic film, and its air quality detection indicator turns from red to green.
In this regard, Xiaomi official also responded that the purifier filter generally consists of a coarse filter layer (larger filter particles), a HEPA filter layer (filtering small particles such as PM2.5) and an activated carbon layer (adsorbing harmful gases such as formaldehyde). Composition, real-time monitoring costs are very good, so most of them are calculated by algorithms. It also revealed that not only Xiaomi air purifiers, but also many other brands have adopted this method to calculate the life of the filter.
For the plastic film that does not open the filter, the indicator light changes from red to green. Xiaomi officially responds that the ambient air quality detected by the sensor will change due to particulate sedimentation and local air flow.
In fact, the general air-purifier detection probes on the market pass the beam, then detect the amount of beam received at the receiving end, receive a part of the proof of particle occlusion, and then calculate the air quality of the entire room through an algorithm. Therefore, regardless of the unpacking of the filter plastic film, as long as the amount of beam at the receiving end is monitored, the value displayed by the air quality monitoring will change accordingly.
It can be seen from this that the filter replacement reminder and indoor air quality monitoring function of most air purifier products on the market today can not really reflect the actual life condition of the filter used in your home air purifier and the real indoor air quality. The values ​​presented are only a "reference interval" given by the algorithm, but can not be trusted.
In general, even if the market scale of nearly 100 billion is developed, the air purifiers have been selling well in the Chinese market for three or four years, but now all the remaining air purifiers on the market are “trueâ€. For consumers, when purchasing air purifier products, more questions are still questioned, and the development of the empty net industry still has a long way to go.
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