First, see if it is chemical water or physical water The so-called electrolyzed water machine is chemical water, so do not use a water purifier that has been chemically reacted to produce water, but a water machine that uses physical water. Second, see if it is coarse or sodium filter The coarse filtration and ultrafiltration cannot be filtered. The sodium filtration can be used to distinguish whether the sodium filter has a high pressure pump. Because the sodium filtration pore size is only 0.0001 micron, the water pressure of the tap water cannot pass the water, and must pass the high pressure pump. Can do it. So you must use electricity. Third, see if it is pure water or live water That is to see if there is energy activation filter after its RO filter. Fourth, rational consumption: Consumers should rationally face different opinions from different water purifier manufacturers when purchasing water purifiers. Water purifiers are not disposable household appliances. They are related to consumers' own health. They should consider whether the water purifier brand should be purchased. After the inspection by the State Quality Supervision Bureau, whether it meets the national drinking water standards and whether it meets the Chinese water purifier industry standards. Under this premise, it is also necessary to consider whether the brand water purifier is perfect in future service, and avoid the failure to contact the manufacturer after installation (or difficult contact) to delay the normal maintenance time of the water purifier. At the same time, we must consider the durability of the water purifier. The life of the brand water purifier is 15-20 years. Purchase method The structure of the household water purifier is roughly classified into a coarse filter, an activated carbon adsorption, an ion exchange resin, a hollow fiber, and a reverse osmosis membrane. To purchase an ideal and practical water purifier, consider the following aspects: 1. Is there a product sanitation license? Users must understand the importance of product quality when purchasing a water purifier. The manufacturer of the water purifier must obtain the sanitation license from the higher-level health supervision department, and be appraised by the technical supervision department, in line with the national “Standard for Drinking Water Qualityâ€. Second, the purchase of a suitable filter is essential. The first generation of water purifiers are mainly filtered by activated carbon, ceramics, etc., which easily breed bacteria and pollute water sources, failing to achieve the effect of clean water sources. The second generation of water purifiers use various artificial polymer membrane filters to remove harmful water. The effect is significant, but its fatal flaw is to filter out trace elements that are beneficial to the body. The third-generation water purifier adopts nano-micro crystal filter technology, which solves the defects of the second-generation water purifier and filters out harmful substances and heavy metals in the water. Therefore, when you choose a water purifier, you must ask the filtering technology and filter material to see if it meets your own needs. Third, whether it has a safe and effective sterilization technology. Now the water purification equipment is sterilized in two ways. One is to add a disinfectant, the disinfectant can kill a part of the bacteria, but the disinfectant contains a trace of chemical components that are harmful to human health; the second is ultraviolet sterilization, which is internationally recognized as the most effective. One of the sterilization technologies, because ultraviolet sterilization is safe and efficient, it can kill almost all bacteria quickly; and ultraviolet sterilization uses physical principles to sterilize, does not require any chemical agents, and does not have side effects on the human body. Fourth, whether it has a sound after-sales service system. Many consumers can't find the address of the repair service phone or the repair service company after purchasing some brands. This situation makes the consumers helpless and wastes resources. Many water purifiers become furnishings; water purifiers After the sale, the focus is mainly on the replacement of the filter element. If the filter element is not replaced for a long time, it will pollute the water source, and the water purifier will also become a “sewage deviceâ€. Choosing a water purifier must choose a perfect after-sales service, such as using a customer service system to track customer information, prompting customers and companies to replace filter elements. Fifth, the purchase price is higher than the price. 1. The structure of the water purifier is different, and the water purification effect is also different. Generally speaking, the first-stage filter water purifier has a simple structure, mainly activated carbon, and has a limited filtering capacity, and can only be used as a coarse filtration, and the filtered water is preferably heated and boiled for drinking. Most of the primary filter water purifiers are low-grade water purification products, each of which sells for between a dozen yuan and 150 yuan. 2. Multi-stage filtration water purifier. The water purifier has two-stage coarse filtration and one set of fine filtration, and the fine filtration adopts a hollow fiber filter core, and the filtered water can be directly consumed. The multi-stage filter water purifier is a mid-range water purification product. Each unit is priced between 300 yuan and 500 yuan. It can be accepted by the working class and is currently used by families. 3, UF ultrafiltration nanofiltration membrane water purifier, with multi-stage pre-filter and ultrafiltration membrane composition, can intercept most of the bacteria, harmful substances, is the most commonly used separation and filtration effect on the market. Drinking water purification device, while retaining trace elements of minerals beneficial to the human body, and then taking advantage of KDF and activated carbon to effectively inhibit the growth of bacteria and fungi in the water and remove discoloration and odor, ensuring safe and healthy use of filtered water. . Moreover, the amount of water produced is relatively large, and the amount of wastewater discharged is small, so that it is faster and more convenient when used in a home kitchen, and does not have to wait for a long time. It belongs to popular consumer goods, and the price ranges from 200 yuan to 5,000 yuan according to different requirements. 4. RO reverse osmosis pure water machine is the most ideal water purification product for treating the water purification effect of rural water and groundwater. It has three stages of pre-filtering, one-stage reverse osmosis membrane precision filtration and one-stage post-filtration. The filtered water is free of bacteria, viruses, heavy metals, pesticides, organic matter, minerals and odors. It is a kind of pure water that can be consumed without heating. This kind of reverse osmosis pure water machine is a high-grade water purification product, and each unit is priced between 1,000 yuan and 5,000 yuan. 6. Purchase according to water quality. 1. Different water hardness in different regions, high hardness water quality in northern China and limestone area in the south, high calcium and magnesium ion content in water, easy to scale, should choose advanced filtration water purifier with ion exchange resin filter. 2. In the city, tap water with chlorine, different color and odor, and more organic matter content, you can purchase household water purifier with more activated carbon load. Because activated carbon has a strong adsorption effect on residual chlorine and heterochromatic odor in water, it has obvious removal effect on organic matter. 3. For tap water purification with turbid water quality in urban and rural areas, household water purifiers with dual functions of coarse filtration and fine filtration should be purchased. For serious pollution in water, it is required to thoroughly filter out any impurities in the water. 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How to choose a water purifier