Patent ID: 7635427

Claim:
An ion exchange filter for a fuel cell system in which a fluid circulates, comprising: a housing provided with a fluid flow-in port through which the fluid flows into the housing, and a fluid flow-out port through which the fluid flows out of the housing; and a cartridge which is disposed inside the housing in which an ion exchange resin is filled, the fluid flowing in the cartridge through the flow-in port is filtrated by the ion exchange resin and the filtrated fluid flows out through the flow-out port, wherein the housing is provided with a casing having an opened upper end and a lid closing the upper end opening, the lid having a peripheral edge joined and formed integrally with an upper end edge of the casing, wherein the fluid flow-in port is provided at an outer peripheral wall of the casing at a portion above a bottom surface of the cartridge disposed inside the housing, and the fluid flow-out port is formed to the lid, and wherein a gap is formed between the housing and the cartridge so that the fluid introduced inside the gap through the fluid flow-in port flows toward the bottom portion of the housing, and the fluid then flows, in a flow passage formed in the housing, upward from the bottom portion of the housing, wherein the cartridge has a fluid outlet covered with stainless first and second meshes disposed in series in a direction along which the fluid flows, wherein the cartridge includes a cartridge body having a cylindrical structure having an opened end defining the fluid outlet, and first and second plates fitted inside the cartridge body at the opened end, wherein the first and second meshes are integrally formed with the first and second plates, respectively, and wherein the first and second plates have outer peripheral surfaces, the cartridge body includes an inner surface, and the cartridge includes seal members fitted between the outer peripheral surfaces of the first and second plates and the inner surface of the cartridge body so that one or more seal members are provided for each plate so as to provide a plurality of sealing portions in the axial direction of the cartridge.