According to the working principle of air purifiers, there are mainly three types: passive, active, and active-passive hybrid.

According to the air purifier's removal technology for particulate matter in the air, there are mainly mechanical filter type, electrostatic electret filter type, high-voltage electrostatic dust collection, negative ion and plasma method.

Mechanical Filtration:

Generally, particles are mainly captured in the following four ways: direct interception, inertial collision, Brownian diffusion mechanism, and screening effect. It has good collection effect on fine particles but large wind resistance. In order to obtain high purification efficiency, the resistance of the filter screen is large, and the filter The mesh needs to be dense, which reduces the 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 on the electrode. Although the wind resistance is small, the effect of trapping larger particles and fibers is poor, which will cause discharge, and cleaning is troublesome and time-consuming, and it is easy to generate ozone. Form secondary pollution.

"High-voltage electrostatic precipitator" is a method that not only ensures the air volume but also absorbs fine particles. This is how the particles are charged with a 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 a 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. However, narrowing the mesh of the filter element will cause blockage. The high-voltage electrostatic dust collection method can make the dust charged. Under the action of electricity, it is 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 indeed capture the dust.

Electrostatic electret filter:

Relative mechanical filtration can only effectively remove particles above 10 microns, and when the particle size of the particles is removed to the range of 5 microns, 2 microns or even sub-microns, high-efficiency mechanical filtration systems will become more expensive, and Wind resistance will increase significantly. Filtered by electrostatic electret air filter material, high capture efficiency can be achieved with low energy consumption, and at the same time, it has the advantages of electrostatic dust removal and low wind resistance, but no external voltage of tens of thousands of volts is required, so no ozone is generated. Its composition is polypropylene material, which is very convenient for disposal.

Electrostatic precipitator:

It can filter dust, smoke and bacteria smaller than cells, preventing lung disease, lung cancer, liver cancer and other diseases. The most harmful to the human body in the air is the dust smaller than 2.5 microns, because it can penetrate the cells and enter the blood. Ordinary purifiers use filter paper to filter dust in the air, which is easy to block the filter holes. 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, preventing colds, infectious diseases and other diseases. Its sterilization mechanism is to destroy the four polypeptide chains of the bacterial capsid protein and damage the RNA.

In the relevant standards of the national "Air Purifier", an air purifier is defined 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 the indoor air. The single air purifier used and the modular air purifier in the central air conditioning ventilation system.

According to the purification needs, air purifiers can be divided into:

(1) Purified type. If you are located in an area with moderate indoor humidity, or the air quality requirements are not too high, you can purchase a purified air purifier to meet your needs.

(2) Humidification and purification type. If it is located in a drier area, the air conditioner is often turned on and the air conditioner is dehumidified and the indoor air is dry, or the air quality requirements are high, it will be the most suitable choice to buy an air purifier with a humidification and purification function. . LG Future Celebrity Air Purifier also has natural humidification technology, which uses technological means to achieve water vaporization. It rotates through a windmill or disc filter, leaving harmful substances in the tray to eliminate, and only discharges 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 you need to be more decent as a gift, then buying a smart air purifier is the best choice.

(4) Vehicle type. If it is used for air purification in cars, it is necessary to specially purify car odors, car formaldehyde and other in-car pollution, and can be specially placed in the air purifier in the car. Therefore, the best choice is a car-mounted air purifier.

(5) Desktop type. It is an air purifier that is placed on the desktop, purifies the air in a certain range around the desktop, and protects the health of people near the desktop. If you often sit in front of the computer, desk, or desk, but the indoor area is not small, or it is a public place, it is not cost-effective or fashionable to buy a large air purifier by yourself. A type of air purifier is a better choice.

(6) Large and medium-sized. It is mainly suitable for indoor occasions with a large area, such as home halls, senior bank offices, senior administrative offices, important lecture halls and conference halls, senior hotels, hospitals, beauty salons, kindergartens and other occasions.

(7) Central air-conditioning system type. It is mainly suitable for the case where central air conditioning is installed, or a single room with a ceiling or multiple rooms are cleaned together.