The invention relates to the technical field of
purified water preparation, in particular to a multi-
media filter for
purified water preparation, which comprises an integrated part, a central part, a screen, a first chamber, a second chamber and a
control unit. The integrated part and the central part are used as an integrated component for a water distribution process and a
backwashing process, the integrated part is arranged at a set position below,
sewage, impurities and a
filter material are gathered into a concave area of the integrated part through up-down reciprocating movement of the integrated part, the
filter material is screened out, the
sewage and the impurities are discharged, the impurities and the
sewage are isolated through single action, and the water distribution process and the
backwashing process are completed. The problem that the flushing effect is affected by
backflow of sewage impurities in the integrated part is avoided, the integrated part is arranged at the set position on the upper portion and serves as a water distribution implementation component, and water is evenly distributed into the filter layer through the water distribution holes; the problem that the original filtering performance of the filter is influenced due to the change of the position or
layout of the filtering layer caused by a single-
pipe water distribution mode is avoided, and in conclusion, the water distribution operation and the
backwashing drainage operation are integrally realized through the integrated part.