Beijing Zhongtian Hengyuan reminder water purifier, also known as water purifier, originated from 1832 in London, England, and was invented by Reed-Stevo in England. Its water purifier can be divided into RO reverse osmosis water purifier, ultrafiltration membrane water purifier, energy water purifier and ceramic water purifier. The RO reverse osmosis water purifier comes standard with five stages of filtration, namely: PP cotton, granular carbon, compressed carbon, RO reverse osmosis membrane and post-activated carbon; Ultrafiltration water purifier is mainly ultrafiltration membrane, supplemented by other filter elements such as activated carbon (excluding energy filter element). Ultrafiltration water purifiers are divided into vertical and horizontal types according to installation methods. The vertical ultrafiltration water purifier consists of PP cotton, granular activated carbon, compressed activated carbon, external pressure ultrafiltration membrane and T33. The horizontal ultrafiltration water purifier consists of stainless steel shell, internal pressure ultrafiltration membrane and KDF. Water purifiers are mainly divided into household water purifiers and commercial water purifiers.