As a barrier to protect the safety of drinking water, water dispensers play a decisive role in water purification. So many families have bought water purifier products. However, some users said that it was very good at the beginning, but after a period of time, something was wrong. Not only was the water output getting smaller and smaller, but also the taste of the water was not right. After various consultations and inspections, it was known that such problems occurred in the water purifier because it had not cleaned or replaced the filter element for a long time. How can we identify the filter element of water purifier

1. RO membrane mainly depends on its desalination rate, which is generally required to be above 97%. Generally recognized brands are mainly made of films rolled by Dow, Huitong, Shihan, Heideneg and other manufacturers. At the same time, ultrafiltration membrane The filtration precision of the filter reaches 0.1 μ m, which can remove microorganisms, colloids, diatoms and other substances that cause turbidity. From the perspective of raw material supply, the raw material quality of ultrafiltration membrane tends to be stable, and consistent accurate control and 100% detection of products during the preparation process ensure the stable performance of products.

two PP cotton filter element is made of 100% non-toxic and odorless polypropylene (material: PP) as raw material by melting, spraying, traction and acceptance. The weight standard of PP cotton is 100-130g, which can block pollutants with large particles in the water.

3. The quality of ultrafiltration membrane is related to whether it has good hydrophilicity, filtration precision and stable product performance. After special hydrophilic treatment of ultrafiltration membrane, the membrane filament has long-term hydrophilic performance, and the hydrolysis antenna is reduced from 79-90 degrees before modification to 30-35 degrees. High water flow can be obtained at low transmembrane pressure, and the pollution resistance of membrane fiber can be improved at the same time.

4. Activated carbon is the filter element with more consumption in the water purifier, whether it is pre or post water purification Active carbon element is added to the filter element. Structurally, the activated carbon filter element can be divided into granular carbon filter element and carbon rod filter element.

(1) Generally, coconut shell carbon with iodine value not less than 800 is required for the front type of granular activated carbon filter element, and the filling amount is more than 85% of the filter shell. The post granular activated carbon is mainly used to improve water quality and taste, so coconut shell carbon with iodine value above 1000 is required; At the same time, the dosage shall be sufficient to ensure that there is no microbial secondary pollution in the process of water treatment, and ensure the health and hygiene of water quality.

(2) Activated carbon rod filter elements are generally divided into compressed activated carbon rod and sintered activated carbon rod according to the process. The compressed carbon rod is made of coconut shell activated carbon powder with iodine value of about 600-800 and food viscose, which is extruded by the machine. It has a large filtering area for water sources and is mostly used as pre filtering. We can distinguish from material selection, water adsorption effect and smell.

5. It is also worth mentioning some functional filter elements based on sintered carbon rods, which have the functions of high-quality sintered carbon rods and also have the functions of bacteriostasis, antibacterial, scale inhibition, etc.

Therefore, it is not difficult for us to judge that PP filter element mainly depends on materials and dosage, and the quality of ultrafiltration membrane and RO membrane mainly depends on hydrophilicity, stability and desalination rate. However, there are many kinds of activated carbon, which will have different effects when used in different positions. It should be judged comprehensively according to the use position and material.