The structure of domestic water purifier is roughly coarse filtration, activated carbon adsorption, ion exchange resin, hollow fiber and reverse osmosis membrane. An ideal and practical water purifier should be selected from the following aspects:
1. Is there a product hygiene approval document?
Users must understand the importance of product quality when buying water purifier. Measures for the supervision and administration of drinking water hygiene shall be stipulated; hygiene licenses obtained from the higher-level hygiene supervision departments shall be appraised by the technical supervision departments and conform to the State's "Standards for the Quality of Drinking Water".
Two, choosing the right filter element is very important.
The first generation of water purifiers mainly through activated carbon, ceramics and other simple filtration, easy to breed bacteria, pollution of water sources, can not achieve the effect of clean water; the second generation of water purifiers used a variety of artificial polymer membrane filtration, the removal of harmful substances in water is remarkable, but its fatal defect is to filter out the trace elements beneficial to the body. Prime. The third generation water purifier adopts nano-crystalline filter technology, which solves the defects of the second generation water purifier and filters out harmful substances and heavy metals in water. So when you choose a water purifier, you must ask about the filter technology and the filter material used to see if it meets your own needs.
Three, whether there is a safe and effective sterilization technology.
Water purification equipment uses two ways to sterilize, one is to add disinfectant, disinfectant can kill a part of bacteria, but disinfectant contains trace harmful chemical components of human health; the other is ultraviolet sterilization, ultraviolet sterilization technology is internationally recognized as one of the most effective sterilization technology, because ultraviolet sterilization is safe, efficient, can be. To kill almost all bacteria quickly; and ultraviolet sterilization using physical principles of sterilization, without any chemicals, will not have side effects on the human body.
Four, whether there is a perfect after-sale service system.
Many consumers can not find the address of the service telephone or the service company after purchasing some brands. This situation makes the consumers helpless and wastes resources. Many water purifiers have become furnishings. Water purifier will also become "sewage apparatus". Choose water purifier must choose perfect after-sales service, such as using customer service system to track customer information, prompt customers and the company to replace filter element.
Five, choose a high performance price ratio.
1, the water purifier structure is different, the water purification effect is also different. Generally speaking, the primary filter water purifier structure is simple, mainly activated carbon, its filtering capacity is limited, can only be used for coarse filtration, filtered water is best boiled to drink. Most of the primary filtration water purifiers belong to low-grade aquatic products, each priced between ten yuan and 150 yuan.
2. Multistage filter water purifier. The water purifier has two stages of coarse filtration and a set of fine filtration, and the fine filtration mostly uses hollow fiber filter element, the filtered water can be directly drinkable. Multi-stage filter water purifier belongs to middle-grade water purification products, each selling price between 300 yuan and 500 yuan, can be accepted by wage earners, family use more.
3. UF ultrafiltration nanofiltration membrane water purifier, with multi-stage pre-filtration and ultrafiltration membrane composition, can intercept most of the bacteria, harmful substances, is the most commonly used market separation, filtration effect of the most common direct drinking water purification device, while retaining beneficial mineral trace elements to human body, reuse of KDF and activated carbon advantages have It can effectively inhibit the growth of bacteria and fungi in the water, remove the color and odor, and ensure that the filtered water can be used safely and healthily. And water production is relatively large, waste water discharge is small, so when used in the family kitchen is faster, convenient, do not need to wait for a long time. It belongs to popular consumer goods. According to different requirements, the price of each unit ranges from 200 yuan to 5000 yuan.
4. RO reverse osmosis water purifier is the best water purifying product for treating rural water and groundwater. It has three levels of pre filtration, one grade reverse osmosis membrane precision filtration and one stage post filtration. The filtered water, which is free of bacteria, viruses, heavy metals, pesticides, organic matter, minerals and heterochromatic odor, is a pure water and can be drunk without heating. This reverse osmosis water purifier is a high-grade water purification product, priced from 1000 yuan to 5000 yuan per unit.
Six, according to the quality of water purchase.
1. The hardness of water in different areas is different. The high hardness water in northern China and the limestone area in southern China have high content of calcium and magnesium ions and are easy to scale. Advanced filter water purifier with ion exchange resin filter core should be purchased.
2. Urban tap water with high content of chlorine, heterochromatic odor and organic matter can be purchased from household water purifiers with more activated carbon. Activated carbon has strong adsorption effect on residual chlorine and heterochromatic odor in water, and has obvious removal effect on organic matter.
3. Household water purifiers with dual functions of coarse filtration and fine filtration should be purchased for the purification of urban and rural water with turbid water quality. For serious water pollution, requiring thorough filtration of any impurities in the water, do not need to heat direct drinking, should choose reverse osmosis pure water machine.
Seven. Choose some basic principles of water purifier.
1. The performance-price ratio of the water purification products is high: the quality of the products is better, the performance is stable; the use is more convenient; the maintenance cost and the operation cost are lower; there is a strong professional technology and good after-sales service.
2. Soft aquatic products are selected for domestic water and water containing certain hardness is selected for drinking (140 mg/L-200 mg/L).
3, water hardness in the area below 170mg/L is best to choose compound ultrafiltration machine.
4. The hardness of water is within 170mg/L - 250mg/L.