Patent ID: 7743883

Claim:
A noise eliminator for a fuel cell provided in an exhaust system to discharge exhaust from a fuel cell, comprising: an inner pipe made of metal, which has a peripheral wall formed with a plurality of sound transmitting holes and through which the exhaust flows in an axial direction; and an outer shell made of resin, which is formed to surround the inner pipe with a specified interval from the peripheral wall, wherein the outer shell includes a reception section in which a sound absorption material is placed between the outer shell and the inner pipe, a water discharge section which is positioned to face a lower portion in the vertical direction of the inner pipe and in which the sound absorption material is not placed between the outer shell and the inner pipe, a first pipe receiving section positioned on an exhaust system downstream side of the outer shell, and a second pipe receiving section positioned on an exhaust system upstream side of the outer shell, those are integrally molded, one end of the inner pipe is press-inserted into the first pipe receiving section of the outer shell and is fixed, and one end of a connection pipe made of metal is press-inserted into the second pipe receiving section of the outer shell and is fixed, and the other end of the connection pipe is slidably fitted in the other end of the inner pipe, wherein a first distance, taken between the inner pipe peripheral wall and the reception section, is larger than a second distance, taken between the inner pipe peripheral wall and the water discharge section, and wherein the outer shell includes a step portion to make the diameter of the outer shell smaller on the water discharge section side.