Centrifugal blower unit, in particular for motor vehicle air conditioners

摘要

The invention relates to a centrifugal blower unit, in particular for motor vehicle air conditioners, comprising a fan wheel (8) in a spiral housing (1), wherein the spiral housing (1) has a bell mouth region (3) and an axial suction opening (2) corresponding to the shape of the fan wheel (8) , characterized in that at the bell mouth region (3) of the spiral housing (1) radially inwardly a diaphragm (4) is arranged, the suction opening (2) delimiting diaphragm end region (5) has at least one sharp edge.