The air purifier, in principle, is divided into three categories: passive, active and active.
According to the air purifier, there are mainly mechanical screen type, electrostatic electret screen type, high voltage electrostatic precipitator, negative ion and plasma method, etc. .
Mechanical filtration
There are four main ways to capture particles: direct interception, inertial collision, English surname diffusion mechanism, screening effect, which is good for collecting fine particles but has high wind resistance, in order to obtain high purification efficiency, the filter screen has high resistance, and the filter needs to be dense lead to reduced life, need to be replaced regularly.
High Voltage electrostatic precipitator
The method of collecting dust by using high-voltage electrostatic field to ionize the gas so that the dust particles are charged and adsorbed on the ELECTRODE, although the wind resistance is small, the effect of collecting larger particles and fibers is poor, it will cause discharge, and the cleaning is troublesome and time-consuming, and it is easy to produce ozone, secondary contamination.
"high-voltage electrostatic precipitator" is a way to ensure both the wind and the adsorption of fine particles. This is before the particles through the filter core by loading a high voltage charged particles in the role of electricity, "easy adsorption" to the filter core on the way.
The high-voltage electric dust collector applies a high voltage to the two electrodes to electrify the passing dust when the two electrodes discharge. Most of the dust is neutral or with a weak charge, so the filter element can only filter the dust larger than the Mesh. However, the reduction of the filter Mesh will cause obstruction. High-voltage electrostatic dust collection method can make dust charged, in the role of electricity, adsorption to a special processing, permanently charged on the filter, so even if the filter core Mesh is large (thick) , can indeed capture dust.
ELECTROSTATIC electret filter
While mechanical filtration is relatively effective at removing particles above 10 microns, efficient mechanical filtration systems become more expensive when the particle size is reduced to a range of 5 microns, 2 microns or even sub microns, and the wind resistance increases significantly. Through the electrostatic electret air filter material filtration, can achieve very high capture efficiency with the low energy consumption, simultaneously has the electrostatic dust removal low wind resistance the merit, but does not need the external 10,000 volts voltage, therefore will not produce the ozone, and because its composition is made of polypropylene material, it is very convenient to dispose of.
ELECTROSTATIC PRECIPITATOR
Can filter smaller than the cell dust, smoke and bacteria, to prevent lung disease, lung cancer, liver cancer and other diseases. The most harmful dust in the air is less than 2.5 microns, because it can penetrate cells and enter the blood. Ordinary purifier, filter paper to filter the dust in the air, easy to plug the filter hole, dust not only does not have sterilization effect, but also easy to cause secondary pollution./nElectrostatic sterilization
Using about 6000 volts of high-voltage electrostatic field, can instantly and completely kill the dust attached to the bacteria, viruses, to prevent colds, infectious diseases and other diseases. Its sterilization mechanism is to destroy the 4 polypeptide chains of bacterial capsid protein and damage the RNA.
The national air purifier defines air purifier as "equipment for separating and removing one or more pollutants from the air. A device capable of removing pollutants from the air. Mainly refers to the use of single air purifier in the room and the central air conditioning ventilation system in the modular air purifier.
In terms of purification needs, the air purifier can be divided into:
(1) purified type. If you're in an area with moderate indoor humidity or don't have a high air quality requirement, buy a purified version of the air purifier.
(2) humidifying and purifying type. If it is located in a drier area, often opened air conditioning by air conditioning dehumidification caused indoor air dry, or higher air quality requirements, then choose a humidification purification function with the air purifier, would be the most appropriate choice. LG's air purifier also has natural humidification technology, which uses technology to vaporize water by rotating a windmill or disc filter to remove harmful substances from the tray, releases only ultra-fine and clean water molecules into the air.
(3) smart. If automation, intelligent monitoring of air quality, or noble taste, or the need to give a gift more decently, then a smart air purifier is the best choice.
(4) vehicle-mounted. If it is used in the car air purification, need to specifically purify car odor, car formaldehyde and other vehicle pollution, and can be placed in the car air purifier, so, the best choice for car air purifier.
(5) desktop. That is placed on the table, purify the air around the table within a certain range, protect the health of people near the table Air Purifier. If you often sit at a computer, a desk, or a desk, but you have a large indoor area or are in a public place, it's not cost effective or fashionable to buy a large air purifier, a desktop air purifier is a better choice.
(6) medium to large size. It is mainly used for indoor occasion with large area, such as Home Hall, Senior Bank Office, Senior Administration Office, Important Lecture Hall, Senior Hotel, hospital, beauty salon, kindergarten and so on.
(7) air conditioning. The utility model is mainly suitable for purifying a single room or multiple rooms with a ceiling or an installed air conditioning.
