The working principle of reverse osmosis water purifier: reverse osmosis is the most precise membrane liquid separation technology. The operating pressure is applied on the influent (concentrated solution) side to overcome the natural osmotic pressure. When the operating pressure higher than the natural osmotic pressure is added to the On the concentrated solution side, the flow direction of the natural infiltration of water molecules will be reversed, and the water molecules in the influent (concentrated solution) will pass through the reverse osmosis membrane to become purified water on the dilute solution side; the reverse osmosis equipment can block all dissolved salts and For organic compounds with a molecular weight greater than 100, but allowing water molecules to pass through, the salt removal rate of the reverse osmosis composite membrane is generally greater than 98%.