The Main Types Of Air Purifiers
October 11, 2022
The Main Types Of Air Purifiers
The working principle of air purifier is mainly divided into three types: passive, active and active-passive hybrid.
According to the air purifier for the removal of particles in the air, there are mainly mechanical filter type, electrostatic electret filter type, high voltage electrostatic dust collection, negative ion and plasma method. Specially processed air purifiers are more likely to trap dust.
Mechanical filter
Generally, particles are captured in the following four ways: direct interception, inertial collision, Brownian diffusion mechanism, and screening effect. It has a good collection effect on fine particles but has a large wind resistance. In order to obtain high purification efficiency, the filter screen has a large resistance, and the filter screen needs to be dense, resulting in reduced life, and needs to be replaced regularly.
High voltage electrostatic dust collection
The high voltage electrostatic field is used to ionize the gas so that the dust particles can be charged and adsorbed to the electrode. Although the wind resistance is small, the trapping effect of large particles and fibers is poor, which will cause discharge, and the cleaning is troublesome and time-consuming, and it is easy to produce ozone and form secondary pollution.
"High voltage electrostatic dust collection" is a way to ensure air volume and absorb fine particles. This is the way that the particles are electrically charged by applying a high voltage before they pass through the filter element, so that the particles are "easily adsorbed" to the filter element under the action of electricity.
The high-voltage dust-collecting part originally applied a high voltage to the two electrodes, charging the passing dust when the poles were discharged. Most of the dust is neutral or with a weak charge, so the filter element can only filter to the dust larger than the mesh. But narrow the mesh filter element will cause obstruction. High voltage electrostatic dust collection method can make the dust charged, under the action of electricity, adsorption to the specially processed, permanently charged filter element, therefore, even if the mesh of the filter element is large (thick), it can really capture the dust.
Electrostatic electret screen
Relatively, mechanical filtration can only effectively remove particles over 10 microns. When the particle size is reduced to 5 microns, 2 microns or even sub-microns, the efficient mechanical filtration system will become more expensive, and the wind resistance will increase significantly. Through the electrostatic electret air filter material filtration, can achieve high capture efficiency with low energy consumption, and has the advantages of low wind resistance of electrostatic dust removal, but without the external voltage of tens of thousands of volts, so it will not produce ozone, and because its composition is polypropylene material, it is very convenient to discard processing.
Electrostatic dust removal
It can filter dust, smoke and bacteria smaller than a cell to prevent lung disease, lung cancer and liver cancer. The most harmful dust in the air is less than 2.5 microns, because it can penetrate cells and enter the blood. Ordinary purifier uses filter paper to filter the dust in the air, which is easy to block the filter hole. The dust not only has no sterilization effect, but also easily causes secondary pollution.
Electrostatic sterilization
Using HIGH VOLTAGE ELECTROSTATIC field OF about 60 00 VOLTS, can instantly completely kill bacteria and viruses attached to the dust, prevent colds, infectious diseases and other diseases. The mechanism of its sterilization is to destroy the four polypeptide chains of bacterial capsid protein and damage the RNA.
Air purifier is defined as "equipment that separates and removes one or more pollutants from the air" in the national Air purifier related standards. A device with a certain ability to remove pollutants in the air. It mainly refers to the monomer air purifier used in the room and the modular air purifier in the centralized air conditioning and ventilation system.
According to the purification needs, air purifiers can be divided into:
(1) pure purification type. If it is located in the area with moderate indoor humidity, or the requirement for air quality is not too high, the purchase of pure purifying air purifier will meet the demand.
(2) Humidification and purification type. If it is located in a dry area, the air conditioning is often turned on and the air conditioning is dehumidified, which causes the indoor air to be dry, or the requirement for air quality is high, the purchase of an air purifier with humidification and purification function will be the most suitable choice. LG Future Celebrity air purifier also has natural humidification technology, using scientific and technological means to realize the vaporization of water, through the windmill or disc filter rotation, harmful substances left in the tray to eliminate, only the discharge of ultra-fine and clean water molecules into the air.
(3) Intelligent. If you like automation, intelligent monitoring of air quality, noble taste, or a more dignified gift, then an intelligent air purifier is the best choice.
(4) vehicle type. If it is used for air purification in the car, it is necessary to purify the car odor, car formaldehyde and other car pollution, and can be specially placed in the car's air purifier, so the optimal choice is the car type air purifier.
(5) Desktop type. That is, it is an air purifier placed on the desktop to purify the air around the desktop in a certain range and protect the health of people near the desktop. If you often sit in front of a computer, desk, or desk, but the indoor area is not small, or in a public place, it is not cost-effective to buy a large air purifier by yourself, and it is not fashionable, then the tabletop air purifier is the best choice.
(6) Large and medium-sized. It is mainly suitable for indoor occasions with large area, such as home hall, senior bank office, senior administrative office, important lecture hall and conference hall, senior hotels, hospitals, beauty salons, kindergartens and other occasions, which need special processing air purifiers and are easier to adsorption.
(7) central air conditioning system. Mainly applicable to the installation of central air conditioning, or a single room with a ceiling or multiple rooms together to purify the case.
