WATER FILTER

The present invention relates to a filter arrangement (1) comprising: a chamber (12) comprising a chamber inlet for unfiltered liquid, a chamber outlet for filtered liquid and a wall arranged to keep the unfiltered liquid and the filtered liquid separated, a filter element (2) having a longitudinal extension arranged inside of said chamber (12), wherein said filter element (2) comprises a semi-permeable filtration wall (22) comprising a folded filter (24) arranged in a zig-zag configuration between an inner perforated cylinder (26) and an outer perforated cylinder (28) and an internally located back- washing arrangement (3). The back-washing arrangement (3) comprises: an elongated and hollow body (32) having a longitudinal extension, which is substantially parallel to the longitudinal extension of the filter element (2), a mechanism configured to drive said body (32) in a rotational and/or an axial movement, a plurality of nozzles (34) arranged in fluid communication with a cavity inside of said body (32), said plurality of nozzles (34) projecting laterally from said body (32) such that a distal end (36) of each of said plurality of nozzles (34) is arranged in close proximity to said inner perforated cylinder (26) and an outlet (320) arranged in fluid communication with said cavity of said elongated and hollow body and wherein said plurality of nozzles (34) are arranged parallel to each other along a straight line on said body (32) such that they all project in the same direction. La présente invention concerne un agencement de filtre (1) comprenant : une chambre (12) comprenant une entrée de chambre pour un liquide non filtré, une sortie de chambre pour le liquide filtré et une paroi agencée pour maintenir le liquide non filtré et le liquide filtré séparés, un élément filtre (2) ayant une extension longitudinale agencée à l'intérieur de ladite chambre (12), ledit élément filtre (2) comprenant une paroi de filtration semi-perméable (22) comprenant un filtre plié (24) agencé selon une configuration en zigzag entre un cylindre perforé interne (26) et un cylindre perforé externe (28) et un agencement de lavage arrière (3) situé à l'intérieur. L'agencement de lavage arrière (3) comprend : un corps allongé et creux (32) ayant une extension longitudinale, qui est sensiblement parallèle à l'extension longitudinale de l'élément filtre (2), un mécanisme conçu pour entraîner ledit corps (32) dans un mouvement rotatif et/ou axial, une pluralité de buses (34) agencées