Air supply device for fuel cell for passenger car, has compressor including radial diffuser whose effective flow cross section is changeable by air guiding element of compressor

摘要

The device (L) has a compressor (1) with a radial diffuser (2), whose effective flow cross section is changeable by an air guiding element of the compressor. An axial annular space (4) of the compressor is formed as a bladed axial diffuser with the flow cross section that is cumulative in a direction of flow. The axial annular space of the compressor is led into a coil that is arranged between the axial annular space and rotational axle (1.2) of a compressed wheel (1.1) of the compressor. A turbine (10) is provided for driving the compressor. An independent claim is also included for a method for operating an air supply device.