FUEL SUPPLY SYSTEM AND PRESSURE REDUCING DEVICE

摘要

A fuel supply system is configured to reduce the pressure of hydrogen gas delivered from a hydrogen cylinder by a high-pressure regulator arranged in series, regulate a flow rate of the pressure-reduced hydrogen gas by a hydrogen flow regulating device, and supply the hydrogen gas to a fuel cell. The high-pressure regulator includes a middle passage in which the hydrogen gas after being pressure-reduced by a first regulator and before being pressure-reduced by a second regulator enters, a rear passage in which the hydrogen gas after pressure-reduced by the second regulator enters, a communication passage allowing communication between the middle passage and the rear passage, and an internal air check valve provided in the communication passage and arranged to allow the hydrogen gas to flow in a direction from the middle passage toward the rear passage and block the hydrogen gas from flowing in a reverse direction thereto.

主权项

1. A fuel supply system including:
a fuel storage container for storing fuel gas; a fuel supply passage for supplying the fuel gas from the fuel storage container to a supply destination; a plurality of pressure reducing valves provided in the fuel supply passage downstream of the fuel storage container and arranged in series to reduce pressure of the fuel gas; and a fuel flow regulating device provided in the fuel supply passage downstream of the plurality of pressure reducing valves and configured to regulate a flow rate of fuel gas to be supplied to the supply destination, wherein the plurality of pressure reducing valves include a first pressure reducing valve placed on an uppermost side and a second pressure reducing valve placed next to the first pressure reducing valve, and the fuel supply system includes: a middle passage in which fuel gas after being pressure-reduced by the first pressure reducing valve and before being pressure-reduced by the second pressure reducing valve; a rear passage in which the fuel gas after being pressure-reduced by the second pressure reducing valve; and a gas releasing device configured to release the fuel gas from the middle passage only when pressure of the fuel gas in the middle passage becomes excessive.