To provide a hydrogen dilution device of a fuel cell which can dilute hydrogen into a sufficiently low concentration and has no fear of blocking a penetrating hole.
The hydrogen diluting device of a fuel cell includes a stay room 2 where an anode offgas stays, an anode introducing passage 6 to introduce the anode offgas into the stay room 2, a cathode introducing passage 7 to introduce a cathode offgas into the stay room 2 and an offgas extracting passage 9 to extract the anode offgas and the cathode offgas. An opening 8 of the cathode introducing passage 7 and an opening 10 of the offgas extracting passage 9 are arranged almost facing each other and both of the openings 8, 10 are arranged close to each other with a space d. A bifurcating hole 11 can be arranged in the cathode introducing passage 7 to connect with the stay room 2. Furthermore, one of the opening end portions of the cathode introducing passage and the offgas extracting passage can be inserted into the other opening end portion with a space.
SHIBATA TOSHIHIRO
YASUDA TEPPEI
