Patent ID: 7029234
Filing Date: 2006-04-18
Classification: F04D

Abstract:
1. An air outlet unit ( 1 , 101 ) for a large blower assembly ( 2 ) comprising an outlet tube member ( 3 , 103 ) with an upstream inner end in flow communication with the pressure side of an impeller ( 4 ) of the blower assembly ( 2 ) and a downstream outer end for connection with a duct and a mainly cylindrical inner tube member ( 5 , 105 , 115 ) arranged coaxially to the outlet tube member ( 3 , 103 ) and having an inner end substantially aligned with the inner end of the outlet tube member ( 3 , 103 ) and a downstream outer end, the inner tube member ( 5 , 105 , 115 ) being closed by a closing means ( 6 106 ), characterized in that the inner tube member ( 5 , 105 , 115 ) has an open downstream end ( 114 , 116 ) projecting in the downstream direction beyond the downstream outer end of the outlet tube member ( 3 , 103 ).