Pure water equipment, which uses mainly reverse osmosis membrane technology. Its working principle is to apply a certain pressure to the water, so that the water molecules and ionic mineral elements through the reverse osmosis membrane, and dissolved in the water of the vast majority of inorganic salts (including heavy metals), organic matter, as well as bacteria, viruses, etc. can not pass through the reverse osmosis membrane, so that the infiltration of the pure water and can not be infiltrated through the concentration of the water is strictly separate; reverse osmosis membrane pore size is only 0.0001 microns, and the viral The diameter of the reverse osmosis membrane is only 0.0001 microns, while the virus has a general diameter of 0.02-0.4 microns, the diameter of ordinary bacteria has a 0.4-1 microns.