Water purifier, also known as water purifier and water purifier, is a water treatment equipment that deeply filters and purifies water quality according to water requirements. Water purifier usually refers to a small household purifier.
Its technical core is the filter membrane in the filter element device. At present, the main technologies come from ultrafiltration membrane, RO reverse osmosis membrane and nanofiltration membrane.
Water purifiers can be divided into gradual tightening water purifiers and self-cleaning water purifiers according to pipeline design grades. The traditional water purifier is a gradually tightening water purifier. Its internal pipeline is designed as a loose filter element at the front and a tight filter element at the back. It consists of PP melt-blown filter element, granular carbon, compressed carbon, RO reverse osmosis membrane or ultrafiltration membrane, and post-activated carbon. Usually, these five stages are connected end to end. Trapped and deposited in the filter element, it needs to be disassembled and cleaned manually regularly to ensure the normal operation of the machine. The other is a more advanced self-cleaning water purifier, which has designed two channels and added a washing water channel.
As ordinary domestic water, washing water washes the raw water side of the filter element in the machine, especially the membrane filter element, so as to achieve the function of self-cleaning, and the intercepted dirt can be quickly discharged in time by using the water originally flowing out from the head and the tail at the moment when the washing faucet is turned on and off. The structure design is reasonable, which saves the trouble of manual disassembly and cleaning, avoids the secondary pollution of the mechanism itself and reduces energy consumption.
However, consumers should pay attention to identification. Self-cleaning water purifiers are different from automatic sewage purifiers, computer automatic flushing water purifiers and automatic backwashing water purifiers seen in the market. The former is self-cleaning, which means that all the filter elements in the machine have certain self-cleaning function; The latter only cleans one of the filter elements, not the whole machine. Generally speaking, the self-cleaning water purifier is equivalent to installing a garbage disposal device on the pipeline, which can clean up the dirty things at any time without leaving them in the machine. The traditional non-self-cleaning water purifier is equivalent to putting several trash cans in the room, and the dirt is usually temporarily stored in the machine, which needs to be discharged regularly, and the filter element is often disassembled, cleaned and replaced.