Water purifier is also called water purifier. According to the composition of the filter element, it is divided into RO reverse osmosis water purifier, ultrafiltration membrane water purifier, energy water purifier and ceramic water purifier.

RO reverse osmosis water purifier is equipped with 5 grades of filtration as standard, namely: PP cotton, granular charcoal, compressed charcoal, RO reverse osmosis membrane, and post-activated carbon (also known as small T33) grade 5; The filter membrane is mainly used, and other filter elements such as activated carbon (excluding energy filter elements) are supplemented. Ultrafiltration water purifiers are divided into vertical and horizontal according to the installation method. Vertical ultrafiltration water purifiers are made of PP cotton and granular activated carbon. , Compressed activated carbon, external pressure ultrafiltration membrane, T33; horizontal ultrafiltration water purifier consists of stainless steel casing, internal pressure ultrafiltration membrane, KDF.

Water purifiers are mainly divided into two categories: household water purifiers and commercial water purifiers. Water purifiers can be divided into two categories: progressive water purifiers and self-cleaning water purifiers according to the design level of the pipeline. The traditional water purifier is a progressive tight type, also known as a progressive water purifier. Its internal pipeline is designed to loosen and tighten the filter element. It consists of PP cotton, granular carbon, compressed carbon, rear activated carbon, RO reverse osmosis membrane or ultrafiltration membrane. . Generally, it is composed of 5 levels in order. The pipeline inside the machine is only one path, and the dirt is deposited inside the filter element, which needs to be manually disassembled and washed regularly to ensure the normal operation of the machine. The other is a more advanced self-cleaning water purifier. Two channels are designed in the machine, and a washing water channel is added. Each of the washing water and purified water has a complete channel. The two have their own paths and let the water flow stand up. When the washing water, which is the ordinary ordinary domestic water, passes through the passage, it flushes the internal water filter element, especially the raw water side of the membrane filter element, to achieve self-cleaning. The water will discharge the trapped pollutants in a timely and rapid manner. This structure is designed reasonably, eliminating the trouble of manual disassembly and washing, eliminating the re-pollution of the mechanism itself, and reducing the energy cost. Consumers are reminded to recognize that the self-cleaning water purifier is different from the automatic sewage water purifier, computer automatic flush water purifier and automatic backwash water purifier seen on the market. All filter elements inside the machine have a certain self-cleaning function, which is exclusively produced by the national invention patent. The word "self-cleaning" is directly in front of the product name approved by the state, not just in other places such as promotional materials; The latter three are only used to discharge or flush a certain filter element in the machine. The other filter elements, especially the first three filter elements used as pretreatment, still need to be cleaned manually. In simple terms, the self-cleaning water purifier is equivalent to installing a garbage processor on the pipeline, and the dirt is cleaned out at any time without staying inside the machine. The traditional non-self-cleaning water purifier is equivalent to placing multiple garbage bins in the room, and the dirt is usually temporarily stored in the machine, which requires regular drainage, disassembly and washing and frequent replacement of the filter element.