With the improvement of living standards, more and more people want to pursue a higher quality of life. The installation of water purifiers has become a must-have option for many families. At present, there are many brands of water purification equipment on the market, and there are many types. However, the controversy over the pre-filter has always been relatively large. What is the role of the pre-filter? Is it worth installing? Today we will analyze it in detail.
First, what is the pre-filter
Tap water in the transportation process due to the aging of pipelines, improper management of reservoirs, cleaning and other reasons will cause secondary pollution. As the first coarse filtration equipment of the water purification system, the pre-filter can effectively filter large particles such as sediment and rust in the water, so that the tap water can return to the factory state. The pre-filter is generally installed at the water inlet at the front of the pipe and is a reliable primary filtration device.
Second, what is the role of the pre-filter
1. Intercept large particles of impurities and protect other water equipment
The filtration accuracy of the pre-filter is 5-100μm, which can filter out impurities seen by the naked eye, such as sediment, rust, etc. When these large particles of impurities are intercepted outside, the workload of other water purification equipment at home can be slightly reduced by filtering bacteria and microorganisms in the water. It can also solve the problem that the filter element of the water purifier is easy to block due to the high turbidity of the water quality.
2. Suppress scale and soften water quality
The composition of scale is mainly calcium and magnesium, and the small partners who use the water heater should have seen that there is thick rust in the kettle after boiling water, and some even attach to the inner wall of the kettle are difficult to clean. The pre-filter prevents the combination of calcium and magnesium ions and carbonate ions, and plays a role in preventing the generation of scale. For areas with hard water quality, the pre-filter can effectively solve the problem of water alkali and scale in equipment such as solar energy, water boilers or boilers, thereby prolonging the service life of products such as solar energy, water boilers and boilers.
In short, the pre-filter is the guardian of equipment such as water purifiers, washing machines, solar energy, water boilers and boilers.
Third, the classification of the pre-filter
1. Direct-impact filter
The front filter of the direct-impact mode adopts a stainless steel filter of 50-100um, which penetrates from the inner wall of the pipeline to the outer wall through the pressure of tap water, so that large particles such as sediment in the water are intercepted by membrane pores, and the tap water is coarsely filtered. The disadvantage of the front filter in the direct-impulse mode is that if the tap water quality is too poor, there are too many impurities intercepted in the membrane pores, which is easy to cause blockage, and secondary pollution will occur when it is serious.
2. Backwash type filter
The pressure of this filter penetrates from the inner wall of the filter to the outer wall through the pressure of tap water, and granular impurities such as sediment and rust are trapped in the tube. The backflush mode has obvious advantages over the direct flush mode, and the impurities trapped in the tube can be washed away through the backwash function, eliminating secondary pollution caused by impurity accumulation.
3. Siphon filter
The siphon mode is different from the previous two modes, it is the use of external pressure type, so that the tap water from the outer wall to penetrate inside, sediment, rust is left on the surface by the film pores. Unfortunately, this filter is easily blocked by trapped impurities, and it is difficult to rinse and not clean.
Fourth, how to choose the pre-filter
1. Choose according to the working principle
According to the working principle, the backwash filter in the three pre-filters introduced above has an absolute advantage, and it is recommended that you try to choose backwash if you want to install a pre-filter.
2. Purchase according to the filtration accuracy
Theoretically, the higher the accuracy, the better the filtration effect, the common precision on the market is 30-50μm, but because the pre-filter is mainly for coarse filtration, if you choose a filter with too high accuracy, it will be easy to cause blockage, so we must choose the appropriate accuracy according to the water quality in the area.
3. Purchase according to the rated flow rate
The rated flow rate refers to the amount of water filtered per hour, and the rated flow rate of most products on the market is about 3 tons / hour. Conventional household use as long as more than 1 ton hour can meet the daily use, if the family use more water to choose a large flow of products.
Epilogue:
In some areas of water quality deviation, the pre-filter is still very necessary to install, compared to other types of water purifier pre-filter price is much cheaper, the installation of a household water purifier small partner can try to install a pre-filter can effectively extend the service life of the water purifier filter element to save later costs.