First, the concept comparison of water purifier and water purifier
1. water purifier: chlorine gas and various organic pollutants harmful to human body, such as bacteria, viruses, colloid, rust and impurities, are removed from urban tap water by physical means such as filtration and adsorption. 2. Water purifier: All organic pollutants and inorganic ions in water are intercepted by RO membrane reverse osmosis with ultra-fine precision, and there is a certain amount of wastewater. The effluent is pure water and can be directly drunk.
So conceptually, the water purifier belongs to a kind of water purifier. However, due to the early listing of ultrafiltration water purifiers, these three or four years are mainly the world of ultrafiltration water purifiers, so generally speaking, water purifiers refer to water purifiers with ultrafiltration membranes as the core filtration membranes.
Second, the core membrane comparison
1. The core membrane of ultrafiltration machine is ultrafiltration membrane.
1) ultrafiltration is a pressure membrane separation technology, that is, under a certain pressure, small molecular solutes and solvents pass through a special membrane with a certain pore size, while large molecular solutes cannot penetrate and stay on one side of the membrane, thus partially purifying large molecular substances.
2) In order to distinguish these two machines, it is necessary to know the two technologies used by these two machines, and the ultrafiltration machine uses ultrafiltration membrane. There are two kinds of filtration methods, one is internal pressure type and the other is external pressure type. The accuracy of the filter hole is 0.065438 0 micron. Water molecules are filtered by water pressure to remove some harmful substances such as rust, sediment, colloid, bacteria and viruses. There are still some trace elements and minerals needed by the human body in the water.
3) In places where scale and heavy metals are serious, consumers should pay attention to whether scale will affect their lives unless softening resin filter elements are added, such as D09A, a direct drinking machine with softening system. Without these two problems, the water quality from ultrafiltration machine is still the most suitable for human needs. The service life and quality of ultrafiltration membrane can generally be used for 2 to 3 years. At present, K membrane is relatively advanced in the world, widely used and has a long service life of up to 5 years. It is difficult to control the accuracy of ultrafiltration membrane at 0.0 1 micron, although most manufacturers advertise that it can reach 0.0 1 micron.
4) Advantages: large mineral reserves and large water output.
2. The core membrane of the water purifier is RO reverse osmosis membrane.
1) water purifier (translated as water purifier in mbth) refers to a water purification device that removes or reduces salts (mainly strong electrolytes dissolved in water) to a certain extent. 1.0- 10.0μS/cm, resistivity (25℃) 0.1-1.0 * 2650px, salt content1-5mg/l.
2) The main function of the core membrane of the water purifier is to filter floating objects in the water and remove heavy metals, bacteria and viruses in the water. It has high filtration technology, generally five-stage filtration, the first stage is pp cotton screen, the second and third stages are activated carbon, the fourth stage is RO reverse osmosis membrane, and the fifth stage is precision activated carbon.
Advantages and disadvantages of water purifier and water purifier
1, ultrafilter
1) Advantages: Trace elements and minerals needed by human body are retained, and the PH value is weakly alkaline.
2) Disadvantages: calcium and magnesium ions of scale and water alkali have a general removal effect on heavy metals. If the water source is municipal tap water, which is generally polluted by organic matter and the scale is not large, then the ultrafiltration machine is the most suitable.
2, pure water machine
1) Advantages: All substances in the water can be filtered clean, and the water quality tastes sweet.
2) Disadvantages: The water quality has no beneficial minerals and is weakly acidic.