Patent ID: 7173066

Claim:
An electrodeionization module for use in an electrodeionization water purification device, comprising: a frame with a given thickness and having an inflow orifice and an outflow orifice; a cation exchange membrane disposed so as to seal up one side of he frame; an anion exchange membrane disposed so as to seal up the other side of the frame; and an ion exchanger filled into an internal space defined by the frame, the cation exchange membrane and the anion exchange membrane, wherein the ion exchanger has many macropores therein and wherein: the macropores have an open cell structure in which the macropores are interconnected via mesopores, the mesopores have an average diameter of 1 to 1000 Î¼m, a total pore volume is in a range of 1 to 50 ml/g, ion exchange groups are substantially uniformly distributed, and an ion exchange capacity is not less than 0.5 mÂ·equivalent/g of dry porous ion exchanger, wherein the porous ion exchanger has a block shape.