Patent attributes
An ion exchange filter apparatus to reduce ions contained in a liquid medium used in a fuel cell system is equipped with an ion exchange filter 6 to receive an ion exchange resin 38. The ion exchange filter 6 includes a flow passage 27 to introduce the liquid medium to the ion exchange resin 38, a bypass passage 7 to flow the liquid medium by bypassing the ion exchange resin 38, and an orifice 21 disposed at a branch section where the bypass passage 7 is branched from the flow passage 27, to determine a flow volume ratio of the liquid medium flowing in the ion exchange resin 38 and the bypass passage 7, wherein a hole diameter of the orifice is set so that a pressure loss generated when all the amount of the liquid medium flows in the bypass passage 7 becomes substantially equal to an allowance maximum pressure loss of the ion exchange filter 6.
