As we all know, the filter element is the most important core part of the water purifier, which determines the quality of the filter. In the early water purifier, single filter filtration is more common, but this filtration method can not completely remove the pollutants in the water, and the pollutants gather quickly, the life of the filter is greatly reduced, and the water purification effect is poor. In order to avoid the above problems, the water purifier adopts a combination of four to six filter elements to enhance the water purification effect on the one hand and to extend the life of the filter core on the other hand.
The following is an example of a five-stage filter combination:
Primary filtration: Nowadays, the water purifier on the market generally uses 5μm PP cotton as the filter material to remove large particles such as rust, sediment and suspended solids. The coarse filtration is usually changed once every 3-6 months.
Secondary filtration: Granular activated carbon filter (UDF) integrates adsorption, filtration and interception, and catalysis. It can effectively remove chemical pollution caused by pesticides, pesticide residues, organic solvents and other industries. It can also effectively remove organic matter, residual chlorine and other radioactive substances in water, and has the effects of discoloration and deodorization. The general period of use is 3-6 months.
Three-stage filtration: Sintered activated carbon is used as the filter material (CTO) (some manufacturers use PP cotton as the filter material) to deeply absorb the color, odor and residual chlorine in the water, and filter out fine impurities. Used in the third stage of the water purifier, it also plays the role of protecting the main filter of the water purifier. The service life is generally 3-6 months.
Four-stage filtration and one main filter element (If you need to understand the filtration principle of various filter elements, please go to the headline space to see the professional introduction of various water purifiers)
1. Ultrafiltration membrane filter: It is recommended to replace it once in 2 to 3 years.
2. Nanofiltration membrane filter: It is recommended to replace it once every 2 years.
3, RO reverse osmosis membrane filter: It is recommended to replace it once every 2 years.
4, high-density activated carbon filter: it is recommended to replace once a year.
Five-stage filtration: The rear activated carbon filter (T33), as the last step of the pure water machine, can further adsorb the odor of water and increase the oxygen content of the purified water, mainly improving the taste of the water. Especially for the pure water machine using the pressure storage bucket, the rear activated carbon is recommended to use the silver-loaded activated carbon filter material, which can effectively absorb the odor generated by the storage bucket, and can also sterilize and inhibit the drinking water to ensure the safety of drinking water. The recommended service life is 12 months.
The activated carbon water purifier uses ultraviolet light tubes to kill fines and microorganisms. It is recommended to change it once a year.
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