Dust collection technology

　　The principle of high-voltage electrostatic adsorption is used to remove particulate pollutants in the air, such as dust, soot, pollen, cigarette smell and kitchen fumes. The disadvantage of this technology is that it is easy to generate ozone, and it is only effective for large particle gases such as particulate matter. The disadvantage is that it is necessary to pay attention to the safety of electrical appliances (the high voltage can sometimes reach tens of thousands of volts), it is difficult to clean, and it is easy to generate ozone. It must be properly designed to reduce the ozone discharge to below a safe concentration.

　　Ozone can kill bacteria, kill some viruses and bacteria, and also kill human white blood cells, which may lead to cancer. Therefore, it is generally not used in household air purification products. The ozone factor is mainly used to sterilize the air. Ozone is a world-recognized efficient sterilizing and detoxifying oxidant, which can efficiently decompose various decoration pollutants and quickly kill various viruses and bacteria. It can meet the needs of newly decorated and staged special static treatment, but because of the strong oxidizing effect of ozone, it will cause harm to people and accelerate the aging of the surface of the object. After automatically reducing to oxygen, it is a green oxidative decomposer without any chemical residue.

　　Ultraviolet rays use ultraviolet lamps to sterilize and sterilize inside the machine, but it is also prone to excessive ozone generation. To achieve an effective disinfection function, a certain irradiation time must be guaranteed. The air purifier generally has a large wind speed, so the ultraviolet sterilization ability is limited, and the human body cannot receive ultraviolet radiation for a long time, so it must be tightly sealed.

　　physical technology

　　Photocatalyst is a general term for photo-semiconductor materials with photocatalytic function represented by nano-scale titanium dioxide. It is coated on the surface of the substrate, and under the action of light, it produces a catalytic degradation function, which can degrade toxic and harmful gases in the air. The photocatalytic air purification device with ultraviolet light source has a purification efficiency of 3% (calculated according to the difference in pollutant concentration between the inlet and outlet of the device), and the good one does not reach 5%. Therefore, its purification efficiency is very low, and related studies have shown that highly toxic intermediate products will be produced in the photocatalytic process.

　　Negative ion and plasma method

　　It is by charging the particulate matter in the air, coalescing to form larger particles and settling, but the particulate matter is not actually removed, but only adheres to the nearby surface, which is easy to cause dust again. High-pressure ion technology produces by-products such as ozone during its operation.

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