First, the working principle of water purification equipment
The first stage: microfiltration membrane: microfiltration membrane removes all kinds of visible objects/dust and impurities from tap water. These particles come from pipeline aging, rust, secondary pollution of roof water tank and so on.
Second stage: compressed carbon: compressed carbon removes chlorine and organic impurities, such as harmful pesticides. It can also absorb the odor, color and smell produced by organic matter in water, which come from disinfection by-products of tap water.
The third stage: ultrafiltration membrane: ultrafiltration membrane can remove bacteria, viruses and spores from water.
The fourth stage: filter life indicator: the device adopts gear structure design. With the passage of water, the rotation of the gear makes an inner shaft move upward until the water outlet is blocked and the water cannot pass through, that is, the total amount of water passing through the water purifier is calculated through the designed stroke, thus ensuring the safety of the water outlet.
Most water purifiers adopt a progressive structure based on the screen-blocking filtering principle, which is composed of multi-stage filter elements connected in series from end to end. The precision of filter elements is arranged in sequence from low to high, so that multi-stage filter elements can share the trapped dirt, reduce the number of filter element blockage, manual sewage discharge and disassembly and washing, and prolong the cycle of replacing filter elements. There is also a new design idea, which is the self-cleaning structure based on the principle of mass distribution. Its design idea is no longer to provide as much space as possible to store and receive pollutants, but to separate a small part of clean water by the principle of quality separation, and at the same time let the raw water flow as usual, so as to take away pollutants in time with the water flow and achieve the purpose of running water without rot. In this way, pure water can be obtained without or easily depositing dirt in the machine, which avoids secondary pollution, greatly reduces the loss of filter elements, and has better water quality, safety, energy saving and low carbon. The self-cleaning water purifier adopting this new principle won the gold medal in the 7th International Invention Exhibition, and it has a structure of one inlet and two outlets. It improves the structural disadvantages of the traditional water purifier, which leads to the accumulation of raw water impurities in the machine and finally becomes sewage. Therefore, the self-cleaning water purifier has no concept of sewage and sewage water purifier, and it is replaced by washing water. With the improvement of living standards, the popularity of water purifiers will become wider and wider, and new technology products will better meet people's needs.
Second, the purchase guide
Whether there is a product hygiene license approval.
Users must realize the importance of product quality when purchasing water purifiers. Provisions of the Measures for the Supervision and Administration of Drinking Water Hygiene; Obtained the hygiene license from the health supervision department at a higher level, and was appraised by the technical supervision department, which met the national drinking water quality standard.
Choosing the right filter element is very important.
The first generation of water purifiers mainly used activated carbon, ceramics and other simple filtration, which was easy to breed bacteria and pollute the water source, and could not achieve the effect of cleaning the water source; The second-generation water purifier uses various artificial polymer membranes to remove harmful substances in water, but its fatal defect is that it filters out trace elements beneficial to the body. The third-generation water purifier adopts nanocrystalline filter element technology, which solves the defects of the second-generation water purifier and filters out harmful substances and heavy metals in the water. Therefore, when choosing a water purifier, be sure to ask about the filtering technology and materials used to see if they meet your own needs.
Whether there is a safe and effective sterilization technology.
There are two ways to disinfect water purification equipment. One is to add disinfectant, which can kill some bacteria, but contains trace chemicals harmful to human health. The second is ultraviolet sterilization, which is one of the most effective sterilization technologies recognized internationally, because ultraviolet sterilization is safe and efficient, and can kill almost all bacteria quickly; Moreover, ultraviolet sterilization adopts physical principles, does not need any chemical agents, and has no side effects on human body.
What is recommended above is the principle of water purification equipment and the matters needing attention in the process of purchasing. It can be known that although there are many water purification equipment, they can be classified in detail according to their size. For example, the common ones may be large and small water purifiers used in daily life at home, or large water purification equipment used in production and processing workshops, but they generally adopt advanced technology. Filtering out impurities and some toxic and harmful pollutants in water further provides us with safe water resources, so the principle is similar. Purchase can refer to the above.