Fuel gas supplying and filling system

摘要

A fuel gas supplying and filling system for a fuel gas consuming unit, capable of using a supply passage in both filling and supplying operations and improving the airtightness and reliability of a fill passage. A high-pressure tank and a fuel gas consuming unit are connected to each other by a supply passage, and an electromagnetic pressure regulating valve is provided on the supply passage. An electromagnetic on-off valve is provided between the electromagnetic pressure regulating valve and the high-pressure tank. A fill passage is connected to a portion of the supply passage, the portion being located between the electromagnetic pressure regulating valve and the electromagnetic on-off valve. The fill passage is configured such that the high-pressure fuel gas can be supplied through a filling opening. When the high-pressure fuel gas is introduced to a downstream side of the electromagnetic on-off valve, the electromagnetic on-off valve opens the supply passage.

主权项

1. A fuel gas supplying and filling system comprising:
a supply passage configured to connect a fuel gas consuming unit configured to consume a fuel gas and a high-pressure tank configured to store the fuel gas of high pressure; a normally closed electromagnetic pressure regulating valve provided on the supply passage and configured to regulate pressure of the fuel gas flowing through the supply passage, to pressure corresponding to a current supplied to the electromagnetic pressure regulating valve and close the supply passage when the current supplied to the electromagnetic pressure regulating valve is stopped; an electromagnetic on-off valve provided on the supply passage so as to be located upstream of the electromagnetic pressure regulating valve and configured to be able to open and close the supply passage; a low-pressure-side pressure detector provided on the supply passage and configured to detect the gas pressure at a portion closer to the fuel gas consuming unit than the electromagnetic pressure regulating valve; and a control unit configured to control the current supplied to the electromagnetic pressure regulating valve such that the gas pressure detected by the low-pressure-side pressure detector becomes predetermined target pressure, wherein: a fill passage is connected to a portion of the supply passage, the portion being located between the electromagnetic pressure regulating valve and the electromagnetic on-off valve; the fill passage is configured such that the fuel gas of the high pressure is able to be filled through a filling opening; when the fuel gas of the high pressure is introduced through the filling opening, the electromagnetic on-off valve opens the supply passage; the electromagnetic pressure regulating valve includes a housing including a valve passage connecting a primary port connected to the high-pressure tank and a secondary port connected to the fuel gas consuming unit, a valve body provided in the housing and configured to move between a closed position where the valve body closes the valve passage and an open position where the valve body opens the valve passage to control an opening degree of the valve passage, a return spring configured to bias the valve body in a direction toward the closed position, an electromagnetic proportional solenoid configured to apply a magnetizing force, corresponding to the current supplied from the control unit, to the valve body to cause the valve body to move in a direction toward the open position, a bearing member interposed between the valve body and the housing and configured to support the valve body such that the valve body is able to slide between the closed position and the open position, and a first sealing member and a second sealing member configured to respectively seal both sides of the bearing member; a pressure return chamber connected to the secondary port is formed in the housing; and the first sealing member applies an acting force, corresponding to internal pressure of the pressure return chamber, to the valve body to cause the valve body to move in the direction toward the closed position.