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Classification Of Air Purifier Types

- May 24, 2017 -

The working principle of air purifier, mainly divided into three kinds: passive, active, passive hybrid.

According to air purifier for particulate matter removal technology, mainly mechanical filter, electrostatic electret filter, High voltage electrostatic precipitator, anion and plasma method.

Mechanical Filtration

The particles are generally captured in 4 ways: direct interception, inertia collision, Brownian diffusion mechanism, screening effect, its fine particle collection effect is good but the wind resistance is big, in order to obtain the high purification efficiency, the screen resistance is larger, and the filter network needs the density to cause the life to reduce, needs to replace regularly.

High Voltage Electrostatic Dust collection

The use of high-voltage electrostatic field so that the gas ionization so that the dust particles charged to the electrode on the Dust collection method, the wind resistance is small but the larger particles and fiber trapping effect is poor, will cause discharge, and cleaning trouble time-consuming, easy to produce ozone, forming two of pollution.

"High-voltage electrostatic dust Collection" is a way to ensure that both the air volume and the fine particles can be adsorbed. This is in the particle through the filter core by loading high voltage to make it live, so that the particles under the action of electricity "easy to adsorb" to the filter on the way.

The high voltage electrostatic precipitator was originally applied to two electrodes, which were electrified by the dust at the time of the bipolar discharge. Most of the dust is inherently neutral or with a weak charge, so the filter can only filter dust larger than the mesh. But the mesh that shrinks the filter will cause obstruction. High-voltage electrostatic dust Collection mode can be charged, under the action of electricity, adsorption to the special processing, permanent-charged filter, so even if the filter is large (thick), it can actually capture the dust.

Electrostatic Standing-pole filter

Compared with mechanical filtration can only effectively remove 10 microns above the particulate matter, and when the particle size of particles in addition to 5 microns, 2 microns or even sub-micron range, efficient mechanical filtration system will become more expensive, and the wind resistance will increase significantly. Through the electrostatic electret air filtration material filtration, can lower energy consumption to achieve a very high capture efficiency, at the same time both electrostatic precipitator low wind resistance advantages, but no external tens of thousands of volts of the voltage, it will not produce ozone, and because of its composition for polypropylene material, very convenient to discard treatment.

Electrostatic precipitator

It can filter dust, smoke and bacteria that are smaller than cells, prevent lung disease, lung cancer and other diseases. In the air the most harmful to the human body is less than 2.5 micron of dust, because it can penetrate the cells, into the blood. Ordinary purifier using filter paper to filter the dust in the air, very easy to plug the filter, dust not only has no sterilization effect, and easily cause two of pollution.

Electrostatic sterilization

The use of 60 00 KV high-voltage Electrostatic field, can instantly complete the killing of the dust attached to the bacteria, viruses, prevent colds, infectious diseases and so on. The mechanism of sterilization is to destroy the 4 polypeptide chains of bacterial capsid protein and to damage RNA.


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