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source:Optimization dedicated release time:2022-04-24 Hits: Popular:aromatherapy diffuser direct sales
With the popularity of smog and the improvement of people's environmental awareness, air purifiers have become a very familiar class of electrical products. Filter purifiers, negative ion purifiers, the endless stream of purification equipment is dazzling. But in fact, different air purifiers represent different eras of purification technology.
Go up! The evolutionary theory of the development of negative ion air purifiers
First used for fire fighting purposes
In 1823, two people named John and Charles Dean invented a new type of smoke protection device in order to prevent firefighters from being attacked by smoke when extinguishing fires, which greatly protected the personal safety of firefighters.
In 1854, Johns Tenhouse showed the world a foreign version of "the waves behind the Yangtze River pushes the waves forward"-an improvement on the invention of his predecessors. Through experiments, he learned that adding charcoal to the air filter can filter out harmful and toxic gases from the air, which also adds new functions to the air purifier.
Slowly, the air purifier gradually matured, and it can be said that it has experienced three generations of purification technology.
1.0 Purification technology-fiber filter type
Filtration technology is the earliest generation of air purification technology, generally suitable for simple foreign air. But at present in China, this kind of purification technology is still the most common in the family.
The principle of filter technology is to use a fan to draw air into the machine, and filter pollutants in the air through the built-in filter. The advantage is that the price is cheap, and in terms of installation, it can be bought and used. With its solid market foundation, the filter air purifier quickly became popular due to the smog.
It is undeniable that the filter air purifier does have a certain role in purifying the air, especially for large-particle pollutants. But at the same time, due to the size of the filter pore size, although it can effectively filter large particles such as PM10, it is difficult to filter the lung particles below 2.5 microns. Therefore, even the most advanced HEPA filter manufacturers have publicly claimed. And when the filter is easily saturated, if it is not replaced in time, it is easy to cause secondary pollution of indoor air. Moreover, the later maintenance costs are relatively large, causing more troubles.
According to the big data on air purifiers published by Allwinnet.com, the current sales of filter air purifier products have shown a downward trend, and the mainstream products use 11-H13 household-grade filters, and use medical health-care filters above H14. The products are rare.
2.0 purification technology-electrostatic precipitator
The development of air purification technology to the second generation is mainly electrostatic dust removal technology.
Electrostatic dust removal technology is mainly to make the particles in the air positively charged after the air passes through the high-voltage ionization zone, and the pollutants are adsorbed on the dust collecting plate through the principle of positive and negative phase absorption, which has high dust removal efficiency and can purify larger air volume. , The particle size range that can be removed is wide. However, this technology still does more harm than good, because static electricity tends to attract dust and cause secondary pollution. Moreover, the use of electrostatic dust removal technology can easily produce ozone, positive ions and other derived pollution, which is very harmful to human health.
Since this electrostatic precipitating air purification method is realized by high-voltage discharge, the device needs to be placed in a place out of reach of people, so it is generally used in a fresh air system.
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