Water purifier, also known as water purifier, according to the water purification method is mainly divided into three categories:
1, reverse osmosis (RO) water purifier, is a kind of use of reverse osmosis membrane to filter tap water water machine, infiltration is from the high concentration to the transfer of the low concentration, reverse osmosis is the transfer of the low concentration to the high concentration of the water machine out of the RO water is a high concentration of pure water, water, except for the molecules of all substances in the water are all Removed, because it is low concentration to high concentration transfer so it needs energy - to pressurize the motor, to 24 hours of electricity, because the RO membrane of the instant filtration of water is very low (RO membrane membrane pore is only 0.001 microns), pure water out of the standard is 1:3, that is, 4 liters of water out of 1 liter of pure water, so it must be connected to a Water storage tank, water storage tank pressurized water supply. Now the domestic factory to do a lot of RO water machine, on behalf of: Shanghai Jannet, Zhejiang Qinyuan, etc., but also a lot of specialized in the production of membrane and motor accessories factory, resulting in too many handmade workshop assembled on their own, the quality is uneven, to be standardized.
2, ultra-filtration water machine, is the use of ultra-filtration membrane water filtration water machine, ultra-filtration membrane is based on the improvement of the RO membrane, because the RO membrane membrane pore size is only 0.001 microns, the water is too pure, in the removal of harmful substances in the water at the same time also put the beneficial minerals and trace elements removed, ultra-filtration membrane membrane increase the membrane pore to reach 0.01 microns, so that some of the minerals and trace elements of the human body can also be passed, the membrane pore size can be increased to reach 0.01 microns, so that some of the minerals and trace elements can also be passed, the membrane pore size can be increased to reach 0.01 microns. And trace elements can also be passed, but many harmful substances can be blocked, such as bacteria, known to be the smallest bacteria is 0.2 microns, and rust and sediment can be intercepted, through the sewage outlet. At present, the domestic representative of the plant is a liter, but the ultrafiltration membrane to increase the pore size, some compound molecules in the water, heavy metals, chlorine can not be intercepted, so there is still room for improvement in the process.
3, multi-filter media water purifier, is the use of different filter media to filter different pollutants in the water machine, the filter media is basically: PP cotton + activated carbon, etc., PP cotton is used to filter large particles of sediment in the water, rust, activated carbon is used for adsorption; advanced multi-filter media water purifier, and then a few channels of the filter media, such as KDF, gold filter media, etc., which can be removed from the water of fertilizers, pesticides, pesticides, and chlorine. Chlorine, etc. The advantage of multi-filtration media water purifier is that while filtering harmful substances in water, it also retains minerals and trace elements that are beneficial to the human body. At present, the domestic market is mainly occupied by the U.S. brands of multi-filtration media water purifier: Pentair, the U.S. Pace, Ai Huipu, etc., there are also a number of factories have been built in the country, although the advantages of multi-filtration media water purifier is obvious, but the service life of the filter media by the adsorption capacity of the limitations of the late maintenance costs are higher.
In addition to the above three categories of products, there is a centralized pre-filter - a primary filter installed in the household water pipes, mainly filtering water sediment, rust and other large particles of suspended solids, used to protect the water pipes and water appliances; there are also water softener - a water softener to remove limescale, so that the water is heated. Remove scale, so that the water heated without scale, used to protect hot water appliances such as water boilers, floor heating, etc., but also to improve the quality of water, so that bathing, laundry also has a significantly better effect, the principle of water softeners on the market mainly (1) rely on the addition of drugs such as diphosphoric acid to scale, such as a lot of scale inhibitors on the market is this kind of, (2) rely on the electromagnetic to improve the activity of calcium and magnesium ions to achieve the purpose of not generating scale, but can only be (3) ion exchange type water softener, is currently the most mainstream water softener on the market, the principle is to use sodium ions to replace the water right calcium, magnesium ions, much better than the first two kinds, but there are some small defects, (4) the United States of America Pace the new R & D nanocrystalline salt-free water softeners, do not need to salt without electricity, the principle of relying on the high-energy polymerization of atomic nuclei on the ball to the calcium, magnesium, bicarbonate, etc., in the water into a high-energy ion packing crystal. crystal that will not scale.