The working principle of air purifier
There are three main types: passive, active, and active-passive hybrid.
According to the luftrenare for the removal of particulate matter in the air technology
There are mainly mechanical filter type, electrostatic electret filter type, high-voltage electrostatic dust collection, negative ion and plasma method, etc.
mechanical filtration
Generally, particles are mainly captured through the following four methods: 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 resistance of the filter is relatively large, and the filter The net needs to be dense, resulting in reduced lifespan, and needs to be replaced regularly.
High voltage electrostatic dust collection
The dust collection method uses a high-voltage electrostatic field to ionize the gas so that the dust particles are charged and adsorbed to the electrode. Although the wind resistance is small, the collection effect on larger particles and fibers is poor, which will cause discharge, and the cleaning is troublesome and time-consuming, and it is easy to generate ozone. Form secondary pollution.
“High-voltage electrostatic dust collection” is a method that can not only ensure the air volume but also absorb fine particles. This is the way to charge the particles with high voltage before they pass through the filter element, so that the particles are “easy to adsorb” to the filter element under the action of electricity.
The high-voltage electrostatic dust collection part originally applies high voltage to the two electrodes, and when the two electrodes are discharged, the passing dust is charged. Most of the dust is originally neutral or weakly charged, so the filter element can only filter dust larger than the mesh. But narrowing the mesh of the filter element can cause clogging. The high-voltage electrostatic dust collection method can charge the dust, and under the action of electricity, it will be adsorbed on the specially processed and permanently charged filter element. Therefore, even if the mesh of the filter element is too large (coarse), it can still capture the dust.
Electrostatic electret filter
Compared with mechanical filtration, it can only effectively remove particles above 10 microns, and when the particle size is reduced to 5 microns, 2 microns or even sub-microns, the high-efficiency mechanical filtration system will become more expensive, and Wind resistance will increase significantly. Filtrated by electrostatic electret air filter material, it can achieve high capture efficiency with low energy consumption, and at the same time has the advantages of low wind resistance of electrostatic dust removal, but it does not need to connect tens of thousands of volts, so it will not generate ozone, and because Its composition is made of polypropylene, which is easy to dispose of.
Electrostatic precipitator
It can filter dust, smoke and bacteria smaller than cells to prevent diseases such as lung disease, lung cancer and liver cancer. The most harmful thing in the air to the human body is dust less than 2.5 microns, because it can penetrate cells and enter the blood. Ordinary purifiers use filter paper to filter the dust in the air, which can easily block the filter holes. The dust not only has no sterilization effect, but also easily causes secondary pollution.
Electrostatic sterilization
Using a high-voltage electrostatic field of about 6000 volts, it can instantly and completely kill bacteria and viruses attached to dust, and prevent colds, infectious diseases and other diseases. Its sterilization mechanism is to destroy the 4 polypeptide chains of the bacterial capsid protein and damage the RNA.
The relevant standards of the national “Air Purifier” define an air purifier as “a device that separates and removes one or more pollutants from the air. A device that has a certain ability to remove pollutants in the air. It mainly refers to indoor The single air cleaner used and the modular air cleaner in the central air conditioning ventilation system.
According to the purification needs, air purifiers can be divided into:
(1) Purification type. If you are located in an area with moderate indoor humidity, or the air quality requirements are not too high, then purchasing a purified air purifier will meet your needs.
(2) Humidification and purification type. If you are located in a relatively dry area, the air conditioner is often turned on and dehumidified by the air conditioner, resulting in dry indoor air, or you have high requirements for air quality, then purchasing 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 technological means to achieve water vaporization, rotating through a windmill or disc filter, leaving harmful substances in the tray to eliminate, and only emitting ultra-fine and clean water molecules into the air.
(3) Intelligent type. If you like automatic operation, intelligent monitoring of air quality, or reflect noble taste, or need to be more decent for gift giving, then purchasing an intelligent air purifier is the best choice.
(4) Vehicle type. If it is used for air purification in cars, it needs to purify car odors, car formaldehyde and other car interior pollution, and can be specially placed in the car air purifier, so the best choice is a car-type air purifier.
(5) Desktop type. It is an air purifier that is placed on the desktop to purify the air within a certain range around the desktop 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. A type of air purifier is a better choice.
(6) Large and medium-sized. It is mainly suitable for large indoor occasions, such as home halls, high-level bank offices, high-level administrative offices, important lecture halls and conference halls, high-end hotels, hospitals, beauty salons, kindergartens and other occasions.
(7) Central air-conditioning system type. It is mainly suitable for the installation of central air conditioning, or the purification of a single room with a ceiling or multiple rooms together.
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