1results about How to "Avoid washing out" patented technology

This utility model discloses a multi-stage filtration filter element and a water purification device having the same. The filter element includes PP cotton filter media and a filter assembly. The outer side of the PP cotton filter media is the water inlet surface, and the inner side has a water outlet channel. The filter assembly includes multiple annular filter meshes, which are sequentially fitted around the PP cotton filter media along the radial direction of the filter element. The filtration accuracy of the filter meshes is greater than that of the PP cotton filter media, and the filtration accuracy of the multiple filter meshes increases sequentially from the inside to the outside of the filter element. This utility model uses multiple filter meshes on the outer side of the PP cotton filter media, and the filtration accuracy of the multiple filter meshes is different from that of the PP cotton filter media. Thus, the raw water first passes through multiple filter meshes for filtration, and then passes through the PP cotton filter media for filtration. This avoids the PP cotton filter media directly filtering tap water containing a large number of large particles. Furthermore, the PP cotton filter media is supported by multiple filter meshes on its outer side, preventing tap water from damaging the PP cotton filter media, thereby improving the lifespan of the PP cotton filter media.