Water purifiers can be divided into two categories: progressive water purifiers and self-cleaning water purifiers according to pipeline design levels. The traditional water purifier is a gradually tightening water purifier. Its internal pipeline is designed to loosen the filter element in the front and tighten it in the rear. It is composed of PP melt-blown filter element, granular carbon, compressed carbon, RO reverse osmosis membrane or ultrafiltration membrane, and post-activated carbon. Generally, It is composed of these 5 levels connected end to end. Retentate is deposited inside the filter element and needs to be manually removed and cleaned regularly to ensure the normal operation of the machine. The other type is a more advanced self-cleaning water purifier. There are two channels designed in the machine, and a washing water channel is added. When the washing water used as ordinary domestic water passes through the channel, it will damage the filter element in the machine, especially the raw water of the membrane filter element. It functions as a flushing machine to achieve self-cleaning, and utilizes the water flowing out of the head and tail sections at the moment of opening and closing the washing faucet to discharge the trapped dirt promptly and quickly. This structure is reasonably designed and saves labor. The trouble of disassembling and washing eliminates the need for re-contamination of the mechanism itself, and at the same time reduces energy consumption costs.
However, consumers are advised to pay attention to the identification. Self-cleaning water purifiers are different from automatic sewage water purifiers, computerized automatic flushing water purifiers and automatic backwash water purifiers seen on the market. The former is self-cleaning, that is, It is said that all the filter elements inside the machine have a certain self-cleaning function; the latter only flushes one of the filter elements rather than the entire machine. In layman's terms, a self-cleaning water purifier is equivalent to installing a garbage disposal on the pipeline. The dirt is cleaned out at any time and does not stay in the machine. Traditional non-self-cleaning water purifiers have multiple trash cans placed in the room, and dirt is usually temporarily stored in the machine. Therefore, regular sewage discharge, disassembly and cleaning, and frequent filter element replacement are required.