| 摘要 |
PROBLEM TO BE SOLVED: To suppress generation of abnormal noise at the time of opening a valve, in an exhaust drain valve for fuel cell.SOLUTION: An exhaust drain valve 55 includes a primary passage 88a for introducing anode off-gas and product water from an introduction port 88a4 to the inside, a secondary passage for deriving the anode off-gas and product water, introduced from the primary passage 88a, from a lead-out port to the outside, a valve seat 95 formed at the primary passage lead-out port 88a5, i.e., the lead-out port of the primary passage 88a, and a valve body 97 moving forward and backward for the valve seat 95, and in which a valve part 97a capable of coming into contact and out of contact with the valve seat 95 is formed. The primary passage 88a includes an orifice 88a1 communicating with the primary passage lead-out port 88a5, an introduction passage 88a2 having a diameter larger than that of an orifice 88a1, and communicable with the introduction port 88a4, and a step 88a3 connecting the orifice 88a1 and introduction passage 88a2 with a difference in level.SELECTED DRAWING: Figure 2 |
