Reverse osmosis water purifier is a kind of equipment that uses reverse osmosis technology to filter water quality, which mainly includes three parts: pretreatment system, reverse osmosis membrane component and post-treatment system. The principle is to force the tap water through the reverse osmosis membrane through high pressure to separate the dissolved solids, heavy metals, bacteria and other harmful substances in the water, so as to achieve the purpose of purifying the water quality.

First of all, the tap water is initially purified through a pre-treatment system, including filtration, softening and chlorine removal, to remove particles, impurities and chlorine in the water and protect the reverse osmosis membrane from pollution.

Secondly, the pre-treated water enters the reverse osmosis membrane assembly, and the water is forced through the semi-permeable membrane by applying high pressure through a high-pressure pump, so that the water molecules can pass through the membrane pores smoothly, and the solute dissolved in the water is trapped by the membrane on the other side. This process is similar to reverse osmosis in nature where water flows from a lower concentration to a higher concentration, so it is called reverse osmosis.

Finally, after the filtration of reverse osmosis membrane, the water quality is effectively purified, most of the harmful substances are removed, and relatively clear pure water is obtained. But it also produces a lot of wastewater that needs to be treated or recycled.

In summary, the reverse osmosis water purifier effectively removes harmful substances from water through the principle of reverse osmosis, providing an efficient way of water purification, which is widely used in household, commercial and industrial fields.