Inlet silencer for a volumetric compressor and volumetric compressor equipped with it

An inlet silencer for a volumetric compressor, comprising:

• a housing (2) having at least one inlet (3) and at least one outlet (4),
• wherein at least one partition wall (6) dividing the housing (2) into a first chamber (7) and a second chamber (8) is provided in the housing (2),
• wherein one chamber (7, 8) connects to the inlet (3) and one chamber (7, 8) connects to the outlet (4),
• wherein at least one opening (9) connecting both chambers (7, 8) is arranged in the partition wall (6),
• wherein, in the first chamber (7), at least one reversing plate (12) or baffle is arranged (7) crossing the geometrical line (13) between the inlet (3) and said opening (9),
• wherein the reversing plate (12) or the baffle partially divides the first chamber (7) into several sub-chambers (7a, 7b, 7c) such that an airflow flowing from the inlet (3) to one of the at least one openings (9) must flow around the reversing plate (12) or the baffle, and
• wherein, in the first chamber (7), a fraction of a linear distance of the geometrical line (13) between the inlet (3) and said opening (9) and a distance of a shortest flowpath from the inlet (3) to said opening (9) around the reversing plate (12) or the baffle is a maximum of 2.5,
• wherein an inlet filter (20) is arranged in the second chamber (8) such that the gas entering the second chamber (8) must pass through the inlet filter (20) before it can leave the second chamber (8), and
• wherein the reversing plate (12) or the baffle is provided only in the first chamber (7), among the first chamber (7) and the second chamber (8).