| 摘要 |
A blower motor assembly (10) for the air conditioning system or heating and ventilation system of the passenger compartment of a motor vehicle comprising a housing (12) having an air inlet (14) and an air outlet (16) which is substantially perpendicular to the air inlet; an electric motor (18) having a rotatable output shaft (20) positioned inside the housing and substantially axially aligned with the air inlet; a centrifugal fan (22) mounted on the output shaft inside the housing between the air inlet and the air outlet, the fan having a base portion (24) secured to the output shaft and a number of blades (26) extending from the circumferential edge (28) of the base portion substantially parallel to the output shaft; and an insert member (32) positioned upstream of the fan, the insert member having an annular member (34) mounted in the air inlet and substantially axially aligned therewith, a central member (36) axially aligned with the output shaft, and a number of fins (38) extending radially from the central member and connected to the annular member, each fin extending from the annular member towards the base portion of the fan and having an edge (40) substantially parallel to, and positioned adjacent to, the blades of the fan. Reduced noise generation in the low frequency range. <IMAGE> |
