Both direct drinking water purifiers and reverse osmosis pure water purifiers use reverse osmosis membrane technology, with ultra-fine filtration accuracy, which can filter out impurities, bacteria, viruses, etc. in the water and make the effluent water more pure; The reverse osmosis water purifier utilizes the principles of physical filtration and adsorption to remove chlorine and various harmful pollutants from water, while retaining a large amount of trace minerals. The effluent quality is mineral water.
Different installation and usage methods:
Direct drinking water purifiers generally have a five stage filtration system, including PP cotton, granular activated carbon filter, sintered or compressed activated carbon filter, reverse osmosis membrane filter, and rear activated carbon filter.
Reverse osmosis pure water machine generally consists of three parts: booster pump, transformer power supply, and water storage tank. The first stage is PP cotton, the second stage is granular activated carbon filter, the third stage is sintered activated carbon or compressed activated carbon filter, the fourth stage is reverse osmosis membrane filter, and the fifth stage is equipped with activated carbon filter to improve the taste of the effluent.
The direct drinking water purifier does not need to be connected to electricity, and can use tap water pressure and overflow filtration. There is a stainless steel body that is resistant to high temperature and corrosion, as well as a combination of five level filtration assembly. The direct drinking water purifier does not have an outlet or inlet pressure tank, and requires a booster pump.
The water quality of the direct drinking water purifier is not as good as that of the reverse osmosis pure water purifier.
The functions of the two are different
The reverse osmosis pure water machine can intercept impurities, bacteria, viruses, etc. in water through the selective interception effect of the reverse osmosis membrane, and the effluent is pure water. It causes water to pass through the reverse osmosis membrane through pressure, while other substances are blocked in the first few passages of the reverse osmosis membrane, resulting in purified water. Direct drinking ultrafiltration water purifier uses ultrafiltration membrane filtration to remove solid impurities such as sediment and rust, as well as soluble secondary pollutants (such as bacteria, viruses, organic matter, pesticides, etc.) from tap water, while retaining beneficial minerals and trace elements for the human body.
The disadvantage of a direct drinking ultrafiltration water purifier is that it cannot completely filter heavy metals and water alkali. It is recommended to boil it before drinking.
The water quality inspection standards for direct drinking ultrafiltration machines and reverse osmosis pure water machines are different
The water quality inspection standards for direct drinking ultrafiltration machines and reverse osmosis pure water machines are different. In the Chinese health industry standard "Drinking Water Quality Standard" (CJ94-2005), there are requirements for the removal rate of soluble metal ions for reverse osmosis pure water machines, while there are no such requirements for ultrafiltration water machines. Therefore, it is important to pay attention to whether it meets national health industry standards when purchasing.
In addition, the product label will also indicate filtering accuracy, water output, and other contents. Although the direct drinking ultrafiltration water purifier also indicates these contents, unlike the reverse osmosis pure water purifier, it cannot completely filter heavy metals and water alkali.