First filter element: PP cotton, primary filter element. The filtered substances are large particles, such as rust, sediment, leaves and other substances. As the first barrier, PP cotton intercepts large substances, and its life span is relatively short. Generally, three functions need to be replaced once.
Secondary filter: activated carbon filter, which is mainly aimed at gas pollution, such as residual chlorine and chemical residual gas, has strong adsorption, so for me, the elimination of gas depends on it first. The service life is half a year.
The third filter element: ultrafiltration membrane. This kind of filter element is generally used in ultrafiltration water purifier and reverse osmosis water purifier, and the purification accuracy is better than the first two. The purified tap water can meet the needs of washing vegetables and cooking in the kitchen, and can intercept substances in tap water with accuracy above 0.0 1 micron.
The fourth filter element: RO membrane filter element. This filter element has the highest accuracy, reaching 0.000 1 micron, and can intercept tiny bacteria. Therefore, the purified tap water can be drunk by us without heating and boiling. Because of its high precision, it needs relative protection, and it is put at the end. Long-acting reverse osmosis membrane like Angel can be used for up to 5 years, and now it has obtained the top ten innovative patents in the world and 6 international authoritative certifications.
The fifth stage filter element: rear activated carbon. Mainly a filter element that changes the taste of water. This kind of filter element has a long life and is replaced once a year.
Now there are composite filters, such as the ACF composite filter created by Angel. The higher the grade of these filter elements, the better the water purifier will be, because too many filter elements will increase the use cost, and the water purifier with repeated filter elements will not improve the purification effect.
The water purifier should choose a professional brand with good reputation. Angel 1987 was established for 33 years and has been focusing on the water purification industry. Today, Angel has provided high-quality clean drinking water service to more than 200 million users around the world, and sold well in 65 countries, such as Japan and the United States, providing safe, healthy and fashionable drinking water for human beings and striving to build the first brand of healthy drinking water in China. Angel pays attention to the technical innovation of products, has the first drinking water technology research and development center in China, and is recognized as a "national high-tech enterprise".