Water purifier according to the pipeline design level can be divided into two categories: the gradual tightening type water purifier and self cleaning water purifier. Traditional water purifier is gradually tight type water purifier, its internal piping design filter before the loose tight, consists of PP meltblown filter, carbon particles, compressed carbon, RO reverse osmosis membrane or ultrafiltration membrane, postposition activated carbon is generally composed of the 5 levels in order to end. Retentate deposited on the filter inside, the need for regular manual washable, to ensure the normal operation of the machine. Another kind is the more advanced self clean type water purifier, machine design two channel, an increase of a washing water channel, as usually ordinary domestic water washing water after pathway of machine element especially in the raw water side of the membrane filter to scour to clean itself, and the opening and closing tap, sink, the moment that both head and tail had to drain the water retention of dirt timely and fast discharge, the structure reasonable design of, eliminating the need for manual washing trouble, avoid secondary pollution to the institution itself. At the same time, and reduce the energy cost. Self - cleaning water purifier using a new principle of sub - mass flow, impurities at any time to clean out, clean, to avoid the two pollution, see the following work.
But consumers should pay attention to identify, self cleaning type water purifier different on the market see automatic blowdown water purifier, computer automatic flushing water purifier and automatic back - flushing water purifier, the former is whole self-cleaning. That is to say, all filter on the inside of the machine has certain self cleaning function. Popular speaking, the equivalent of a clean water purifier in the pipeline on the garbage disposal, dirt at any time to clean out, do not stay inside the machine. And the traditional non self clean type water purifier is equal to in the room to use the multiple bins, temporary dirt usually in the machine. Therefore, it is necessary periodic blowdown, washable and frequent replacement of the filter element.