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What indicators should be paid attention to when choosing a suitable air purifier? The harmful substances that need to be filtered in the air are mainly gas particles and solid particles,At present, China's main concern is to remove pm2.5 are gas particles.There are currently five filtration methods for solid particles,The screen effect, inertia effect, interception effect, diffusion effect and electrostatic effect are respectively.Its brief explanation is shown in the following table.The filter media gap is smaller than the particle diameter,Dust less than 1 m does not move with air flow,But because of the impact of the air molecules to do the 'brown movement ',The impact filter fibers are captured.The smaller the particles,The more intense Brown is,The better the filtering effect.The electrostatic field is used to ionize the gas so that the dust particles are charged to the dust collection method on the electrode,But ozone is easy to produce,Causing sec
Kinetico water purification and Megi water purifier which is good? The water purifier is mainly divided into ultra-filtration water purifier, activated carbon water purifier and reverse osmosis water purifier (Ro machine ).■ The ultra-filtration water purifier simply filters out sediment, colloid and bacteria, cannot filter out scale, heavy metals and chemical pollutants, and cannot improve the taste. the external pressure type cannot be washed and discharged, and the internal pressure type can be washed and discharged, the advantages are: no electricity, no waste of water, large flow, long filter life (1-5 years)■ Activated carbon water purifier can absorb foreign-colored peculiar smell, improve taste, and can't filter out scale, heavy metals and chemical pollutants. there is little difference between boiling and drinking, making tea and tap water, there are also secondary pollution problems such as bacterial breeding and nitrite exceeding the standard, which are prone to saturation failure and need t