Patent ID: 6866490

Claim:
Water-injected screw compressor which comprises a compressor element ( 1 ) with two rotors ( 4 ) driven by a motor ( 5 ), which rotors are rotatable in an interior space ( 3 ) of the compressor element ( 1 ), a suction conduit ( 7 ) which connects to an inlet part ( 6 ), situated at the top, of this interior space ( 3 ) of the compressor element ( 1 ), with an inlet valve ( 8 ) which can close off the exit giving out onto this inlet part ( 6 ), a pressure conduit ( 9 ) which connects to this interior space ( 3 ) of the compressor element ( 1 ) and in which a vessel ( 10 ), which at the same time is a water separator, is installed, whereby an injection conduit ( 22 ) is installed between the vessel ( 10 ) and the interior space ( 3 ) of the compressor element ( 1 ), for the injection of water into this interior space ( 3 ), which injection conduit ( 22 ) comprises a central part ( 31 ) which is situated higher than the upper side of the inlet part ( 6 ) of the interior space ( 3 ) of the compressor element ( 1 ), wherein a connection conduit ( 36 ) is provided between the inlet part ( 6 ) of this interior space ( 3 ), on one hand, and a connection point, situated above the maximum water level ( 35 ) of the vessel ( 10 ), onto a downwardly directed part ( 32 ) of this injection conduit ( 22 ) extending downward towards the lower situated exit of this injection conduit ( 22 ) in the interior space ( 3 ), on the other hand.