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source:Optimization dedicated release time:2022-06-14 Hits: Popular:aromatherapy diffuser direct sales
Air purifiers, also known as "air cleaners", air purifiers, and purifiers, refer to decoration pollution that can absorb, decompose or convert various air pollutants (generally including PM2.5, dust, pollen, odor, formaldehyde, etc. , bacteria, allergens, etc.), products that effectively improve air cleanliness, are mainly divided into household, commercial, industrial, and building.
There are many different technologies and media in air purifiers that enable it to provide clean and safe air to the user. Commonly used air purification technologies include: adsorption technology, negative (positive) ion technology, catalytic technology, photocatalyst technology, superstructured photomineralization technology, HEPA high-efficiency filtration technology, electrostatic dust collection technology, etc.; material technologies mainly include: photocatalyst, activated carbon, Synthetic fibers, HEAP high-efficiency materials, negative ion generators, etc. Most of the existing air purifiers are composite types, that is, a variety of purification technologies and material media are used at the same time.
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.
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