The structure of household water purifier includes coarse filtration, activated carbon adsorption, ion exchange resin, hollow fiber and reverse osmosis membrane. To choose an ideal and practical water purifier, the following aspects should be considered:
First, 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.
Second, it is very important to choose the right filter element.
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.
Third, 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.
Fourth, whether there is a perfect after-sales service system.
Many consumers can't find the phone number or address of the service company after buying some brands, which makes consumers very helpless and wastes resources. Many water purifiers have become furnishings; After sale, the water purifier mainly focuses on the replacement of filter elements. If the filter element is not replaced for a long time, it will pollute the water source and the water purifier will become a "blowdown device". When choosing a water purifier, we must choose perfect after-sales service, such as using customer service system to track customer information and prompt customers and companies to replace filter elements.
Fifth, buy a cost-effective one.
1. Different water purifier structures have different water purification effects. Generally speaking, the primary filtration water purifier is simple in structure, mainly made of activated carbon, with limited filtration capacity, and can only be used for coarse filtration. It is best to boil the filtered water and drink it. Most of the primary filtration water purifiers belong to low-grade water purification products, and the price of each one ranges from 10 yuan to 150 yuan.
2. Multi-stage filtration water purifier. This water purifier has two stages of coarse filtration and a set of fine filtration. The fine filtration mostly adopts hollow fiber filter element, and the filtered water can be directly drunk. Multi-stage filtration water purifier is a mid-range water purification product, the price is between 300-500 yuan, which is acceptable to the working class and widely used in families.
3.UF ultrafiltration nanofiltration membrane water purifier consists of multi-stage pre-filtration and ultrafiltration membrane, which can intercept most bacteria and harmful substances. It is the most commonly used direct drinking water purification device with the most common separation and filtration effect in the market, while retaining mineral trace elements beneficial to human body. Using the advantages of KDF and activated carbon, the growth of bacteria and fungi in water can be effectively inhibited, and abnormal colors and odors can be removed, thus ensuring the safer and healthier use of filtered water. Moreover, the water output is relatively large, and the waste water discharge is small, so it is faster and more convenient to use in the family kitchen without waiting for a long time. It belongs to mass consumer goods. According to different requirements, the price of each set ranges from 5,000 yuan to 200 yuan.
4.RO reverse osmosis pure water machine is the most ideal water purification product for treating rural water and groundwater. It has three-stage pre-filtration, one-stage reverse osmosis membrane precision filtration and one-stage post-filtration. The filtered water contains no bacteria, viruses, heavy metals, pesticides, organic matter, minerals and strange colors. It's pure water. You can drink it without heating. This reverse osmosis pure water machine belongs to high-grade water purification products, and the price of each set is between 1000 yuan and 5,000 yuan.