Abstract: A fuel cell (100) includes an end plate cover (200) to which a sound-absorbing member (210) is attached and an injector block (180) in an end plate (170F) on one end side of a cell stack (102S). The sound-absorbing member (210) is attached to a sound-absorbing seating surface (203) forming a gas introduction path (202) of the end plate cover (200) which merges a gas jetted from injectors (180a to 180c) to guide it to a fuel gas supply path in a cell coupling portion (170Fc), and is fixed to a convex column (205) in a state in which the convex column (205) is inserted to a through hole (211).

Abstract: A fuel cell (100) includes an end plate cover (200) to which a sound-absorbing member (210) is attached and an injector block (180) in an end plate (170F) on one end side of a cell stack (102S). The sound-absorbing member (210) is attached to a sound-absorbing seating surface (203) forming a gas introduction path (202) of the end plate cover (200) which merges a gas jetted from injectors (180a to 180c) to guide it to a fuel gas supply path in a cell coupling portion (170Fc), and is fixed to a convex column (205) in a state in which the convex column (205) is inserted to a through hole (211).

Abstract: A first rectangular pipe is connected along a path of an oxidation gas supply pipe that supplies an oxidation gas from a pump to an oxidant pole of a fuel cell. A second rectangular pipe is connected to an oxidation off-gas pipe connected to an outlet of the oxidant pole. A lower surface of the first rectangular pipe is contacted with an upper surface of the second rectangular pipe. A connecting path is provided to the contact surface, and a vapor permeable membrane is disposed at the connecting path. An upper surface of a third rectangular pipe is provided in surface contact with a lower surface of the second rectangular pipe, the third rectangular pipe being provided to a coolant out-pipe connected to a cooling jacket of the fuel cell. Generated water in the second pipe is heated and evaporated by a coolant heated in the third rectangular pipe. The water vapor then permeates the vapor permeable membrane, and is directed inside the first rectangular pipe so as to humidify the oxidation gas.

Abstract: A first rectangular pipe is connected along a path of an oxidation gas supply pipe that supplies an oxidation gas from a pump to an oxidant pole of a fuel cell. A second rectangular pipe is connected to an oxidation off-gas pipe connected to an outlet of the oxidant pole. A lower surface of the first rectangular pipe is contacted with an upper surface of the second rectangular pipe. A connecting path is provided to the contact surface, and a vapor permeable membrane is disposed at the connecting path. An upper surface of a third rectangular pipe is provided in surface contact with a lower surface of the second rectangular pipe, the third rectangular pipe being provided to a coolant out-pipe connected to a cooling jacket of the fuel cell. Generated water in the second pipe is heated and evaporated by a coolant heated in the third rectangular pipe. The water vapor then permeates the vapor permeable membrane, and is directed inside the first rectangular pipe so as to humidify the oxidation gas.

Abstract: A filter material fabricated by mixing 10 to 30% by mass of first fibers having a fiber diameter of 10 to 40 ?m, 40 to 80% by mass of second fibers obtained by crimping natural fibers having a fiber diameter of 10 to 40 ?m, and 10 to 30% by mass of third fibers having a fiber diameter of 5 to 10 ?m. The filter material has low pressure loss a high dust holding amount, and high dust filtration efficiency.

Abstract: A filter element has an upstream-side filter layer and a downstream-side filter layer. The downstream-side filter layer is attached to the upstream-side filter layer. A non-woven fabric made of resin fibers formed by a spinning process constitutes the upstream-side filter layer. The resin fibers have an average diameter within a range of 2.5 ?m and 10 ?m. The non-woven fabric has a weight per unit area within a range of approximately 2.5 g/m2 to 15 g/m2. The downstream-side filter layer has a finer mesh than the mesh of the upstream-side filter layer.