Loading patent…
AssigneeRobert Bosch GmbH
InventorsAndreas Gruenberger, Armin Richter, Hans-Christoph Magel
Estimating the term…
A conveying unit (1) for a fuel cell system (31) for conveying and/or recirculating a gaseous medium, in particular hydrogen, comprising a jet pump (4) driven by a driving jet of a pressurized gaseous medium, and comprising a metering valve (6) with a nozzle (12), wherein: the conveying unit (1) is designed as a combined valve jet pump assembly (2); the gaseous medium is fed to the jet pump (4) by means of the metering valve (6); the jet pump (4) has a main body (8); and the jet pump (4) is connected to an anode inlet (3) of a fuel cell (29). According to the invention, a deflection and/or change of direction of the gaseous medium which flows in a flow direction VII from the jet pump (4) to the anode input (3) of the fuel cell (29) occurs exclusively in the deflection region (22), said the jet pump (4) having a separate closure cover (5) connected to the main body (8), and the deflection region (22) and/or the deflection- or guiding geometry of the deflection region for the gaseous medium (22) is formed exclusively in the component of the closing cover (5).
A conveying unit (1) for a fuel cell system (31) for conveying and/or recirculating a gaseous medium, the conveying unit (1) having a jet pump (4) which is driven by a propellant jet of the pressurized gaseous medium and a metering valve (6) having a nozzle (12), wherein the conveying unit (1) is constructed as a combined valve/jet pump arrangement (2), wherein the gaseous medium of the jet pump (4) is supplied by the metering valve (6), wherein the jet pump (4) has a base member (8), wherein the jet pump (4) is connected to an anode input (3) of a fuel cell (29), characterized in that there is brought about a redirection and/or direction change of the gaseous medium flowing in a flow direction VII from the jet pump (4) to the anode input (3) of the fuel cell (29) exclusively in a redirection region (22), wherein the jet pump (4) has a separate closure lid (5) which is connected to the base member (8) and wherein the redirection region (22) and/or the redirection and guiding geometry of the redirection region (22) for the gaseous medium is constructed exclusively in the closure lid (5).
The conveying unit (1) as claimed in claim 18, characterized in that the recess (17) of the redirection nozzle (15) fluidly connects a diffusor region (20) and a connection piece (26) of the jet pump (4) at least indirectly to each other.
The conveying unit (1) as claimed in claim 18, characterized in that the redirection nozzle (15) has in a region of the recess (17) in an inner flow cross-section thereof at least partially an at least substantially spherical inner space (19).
Dependencies are inferred from the claim text.