Patent ID: 8567190

Claim:
An air supplier (L) comprising: a compressor ( 1 ) with a compressor wheel ( 1 . 1 ) rotatably supported in a housing of the compressor ( 1 ) for air supply systems of fuel cells ( 7 ) or for exhaust gas turbocharger of internal combustion engines, the compressor ( 1 ) being operated by means of an electric motor ( 6 ), said compressor ( 1 ) including adjacent the compressor wheel ( 1 . 1 ): a radial diffuser structure ( 2 ) and an axially extending annular channel structure ( 4 ) of constant cross-section formed by an outer annular compressor housing wall ( 4 . 2 ) and an inner annular guide wall ( 4 . 3 ) arranged radially spaced from the compressor housing wall ( 4 . 2 ) with a diverting fluid guide structure ( 3 ) disposed between the radial diffuser structure ( 2 ) and the axial annular channel structure ( 4 ), the inner annular guide wall ( 4 . 3 ) having an outer contour which is cylinder-shaped and in inner contour which is torus-shaped, the outer contour and the inner contour being disposed radially opposite each other, and a collection chamber ( 5 ) arranged axially adjacent the compressor wheel ( 1 . 1 ) and extending radially inwardly from the axial annular channel structure ( 4 ), the collection chamber ( 5 ) having an inwardly curved wall section ( 5 . 2 ) disposed axially opposite the radial diffuser structure ( 2 ), and the inner annular guide wall ( 4 . 3 ) extending toward the curved wall section ( 5 . 2 ) and having an inwardly curved end section ( 4 . 4 ) disposed in spaced relationship from the curved wall section ( 5 . 2 ) so as to form therewith a final annular diffuser structure ( 4 . 5 ) opening radially inwardly into the collection chamber ( 5 ).