Valve for fuel cell, and fuel cell vehicle

摘要

A valve-closing pressure chamber and a valve-opening pressure chamber are arranged on both sides of a main diaphragm inside an outlet shutoff valve. An upper supply/discharge tube and a lower supply/discharge tube are connected to a housing forming the outlet shutoff valve. The upper and lower supply/discharge tube supply and discharge air to and from the valve-closing pressure chamber and the valve-opening pressure chamber, respectively. An opening end, which is on the pressure chamber side, of each supply/discharge tube is obliquely cut relative to the direction of axis of the supply/discharge tube, which increases the opening area of the opening end. This prevents water present in the pressure chamber from adhering to the opening end of each supply/discharge tube and prevents the adhered water from freezing. As a result, operation performance of the outlet shutoff valve is enhanced.

主权项

1. A fuel cell vehicle comprising:
a fuel cell that generates electricity through an electrochemical reaction between an oxidizing gas and a fuel gas, and a valve for the fuel cell that disconnects or connects between an upstream side and a downstream side of a flow path via which the oxidizing gas or the fuel gas is supplied to the fuel cell or via which the oxidizing gas or the fuel gas is discharged from the fuel cell, wherein the valve for the fuel cell comprises: a housing; a first pressure chamber and a second pressure chamber provided in the housing; two supply/discharge tubes connected to the housing, and supplying and discharging fluid to and from the first pressure chamber and the second pressure chamber, respectively; a drive shaft supported by the housing, and movable in its axial direction when subjected to a force corresponding to a pressure difference between the first pressure chamber and the second pressure chamber; a valve member body fixed to the drive shaft; and a flow path forming pressure chamber extending from an inlet portion to an outlet portion opened on the housing, wherein the flow path forming pressure chamber is disconnected or connected in response to a displacement of the valve member body according to a movement of the drive shaft in its axial direction, and wherein at least one supply/discharge tube of the two supply/discharge tubes is positioned straight behind the housing constituting the valve for the fuel cell as seen from a front side to a rear side of the vehicle along its longitudinal direction.