There are many brands of water purifiers on the market, and the filtering principle is a hundred schools of thought, which makes consumers dazzled and confused. How to choose a suitable water purifier?
Choose domestically or import well
Question 1: Some people say that the foreign water purifier has a high penetration rate and the technology is more powerful. Is this true?
Experts: Domestic brand water purification equipment is aimed at China's water quality and pays more attention to water purification. The water quality in foreign countries is good, so the imported water purifier pays more attention to the function of improving the taste of tap water. The principle of water purification is mainly activated carbon water. In addition, some imported water machines are multi-function water machines, such as electrolytic water reduction machines, and should not be confused with water purifiers. Therefore, domestic and imported products have their own advantages. If you want to get a higher quality water life, it is better to use domestic and imported products. However, many domestic water purifiers have also increased the function of improving the taste, and the cost performance is higher.
Need to be reminded that consumers should not blindly equate foreign brands with imported products. Some foreign brands in the market are only raw materials imports, domestic processing, and OEM production, so choose to be cautious.
What is the difference between ultrafiltration membrane and reverse osmosis membrane?
Question 2: What is the ultrafiltration membrane and reverse osmosis membrane, which one is suitable for?
Expert advice: If you are safe, you can choose ro reverse osmosis membrane (pore size 0.0001 micron). Since viruses, bacteria, heavy metals, organic matter, and calcium and magnesium ions are far larger than the pore size of the ro membrane, it is impossible to pass the ro membrane to produce pure water, but at the same time, the beneficial minerals and trace elements in the water are also filtered out, and it is not suitable for long-term drinking.
For safety + health, an ultrafiltration membrane (0.001 to 0.02 μm pore size) is available. The micropores of the ultrafiltration membrane allow only water and beneficial minerals and trace elements to pass through, while the smallest bacteria in water have a diameter of more than 0.02 microns, so bacteria and colloids, rust, suspended matter, sediment, macromolecules larger than bacteria. Organic matter and the like can be intercepted by the ultrafiltration membrane, thereby realizing the purification process.
If the pursuit of cost performance, ro water purifier will produce wastewater, need to be powered to use, ultrafiltration machine does not produce wastewater, no plug-in, more cost-effective.
What is the difference in filter life?
Question 3: Why do some filter elements have to be replaced every three months, and some can be used for three to five years? Is there a water purifier that does not need to replace the filter element?
Expert advice: The filter element is a consumable item and should be replaced regularly.
The common water purification principle of pp cotton filter and activated carbon filter is adsorption, but the adsorption is saturated. When it reaches saturation, it must be replaced. The replacement time is about 3 to 6 months. Both the ro membrane and the ultrafiltration membrane are membrane-treated water, and the service life depends on the chemical stability of the membrane, the physical stability of the component, the cleanability, the influent water source, the pretreatment, the cleaning frequency, the operation management level, etc., generally It can be used for 1 to 3 years. However, the water purifier that does not need to replace the filter element does not exist.
Which is better after-sales service
Question 4: Every family is saying that their own is the world's first, China's well-known, clean water top ten brands, it seems that the head is not small, is there a guarantee?
Expert advice: Do not be superstitious, choose a brand with regular manufacturers and after-sales service. In addition, be sure to check the water purifier production approvals, trademarks, instructions and warranty cards when purchasing, in particular, to see the specific terms of the warranty in the after-sales clause.
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