| 摘要 |
A compressor for compressing a gas comprises an impeller wheel mounted within a housing ( 2 ) defining an inlet ( 8 ) and an outlet ( 6 ). The inlet ( 8 ) has a plurality of apertures ( 20 ) in the form of bores or grooves defined in its surface that serve as an integral silencer. The inlet ( 8 ) may comprise a map-width enhanced structure ( 4 ) with the bores provided on one to a number of surfaces. The design provides for a compact and efficient compressor with noise reduction such that higher pressure ratio designs may be adopted. The apertures ( 20 ) may be provided in the housing ( 2 ) that defines the inlet ( 8 ) or in a separate insert.
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