Improper use of air purifiers is a "display"

　　"You can't see anything if you open the window early in the morning." The memory of smog has been deeply embedded in people's hearts.

　　Recently, Beijing's Air Quality Index (AQI) has been up and down. In the past 10 days, it hovered around 20 when the sun was shining, and hit 400 when it was heavily polluted. This makes every household not only keep masks all year round, but also the popularity of air purifiers has become the first in the country. Memories have been deeply ingrained in people's hearts.

　　However, does having an air purifier mean staying away from smog? Is your home purifier professional? Does it really work for smog? Are you using it correctly? Will it cause secondary air pollution? ...Although some consumers say that "it is better to have something than nothing", but if you don't study the issues mentioned above carefully, your purifier may be a decoration.

　　"Principle and efficacy" few people say clearly

　　Most consumers choose air purifiers as a "friend recommendation"

　　When it comes to the brand of air purifier, whether it is a professional manufacturer of purification products, or a focus on making small smart home appliances, whether it is imported or domestic, consumers can blurt out several. However, when it comes to the types and purification principles of purifiers, few can explain clearly. It's no wonder that most people buy air purifiers based on word-of-mouth recommendations. Friends use them well, so they buy one for themselves. Whether it is suitable for home use is unknown.

　　At present, air purifier products on the market are mainly divided into filter type and non-filter type, which are mainly aimed at particulate matter. The filter type is our common HEPA filter, also known as a high-efficiency filter. Air can pass through, but fine particles cannot. It has a removal efficiency of more than 99.97% for particles with a diameter of 0.3 microns (1/200 of the diameter of a hair), and is the most effective filter medium for pollutants such as smoke, dust and bacteria, and needs to be replaced regularly; The applied electrostatic dust collection, traditional metal plates, honeycomb resin plates, etc. are all ways to collect dust. The adsorption effect of dust, soot, pollen, cigarette smell, kitchen fumes and pathogenic micro-organisms in the air is the most significant. To achieve no consumables, zero cost.

　　The new national standard for air purifiers is just the "minimum threshold"

　　There is nothing unusual about "conforming to the national standard"

　　Once you understand your needs, it's time to compare. In terms of selecting purifiers, we specially interviewed Li Yang, a senior air purifier tester who tried 200 products a year. In 2013, Li Yang started the horizontal evaluation of air purifiers. Today, he has contacted more than 500 air purifier products, providing countless consumers with the simplest purchase suggestions. He told us that the selection criteria for air purifiers are "three highs and one low", that is, high CADR value (clean air output ratio), CCM value (cumulative purification amount), high energy efficiency level, and low noise value. These data consumers can be understood intuitively.

　　After comparing the values, the next step is to look at the price. Li Yang said that although the more expensive the air purifier is, the better, but the high price means the basic principles of brand value, product design and product manufacturing to a certain extent. At present, the new national standard for air purifiers has been released, but in the eyes of employed people, the new national standard still belongs to the scope of "non-mandatory standard", and the "threshold" of this standard is not high, many products can reach the highest level, it is difficult to Through this standard to define the product price.

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