Radial blower, particularly for heating and air conditioning systems in automobiles

Abstract

A radial blower, particularly for heating and air-conditioning systems for automobiles, has a spiral blower housing that is provided with an air intake (5) in a housing lateral wall and with an air outlet out of the spiral housing. A blower drive motor for a fan wheel is mounted to the housing with the fan wheel positioned in the spiral housing to face the air intake (5). The fan wheel has a fan ring with fan blades and a hub. The fan ring and the hub are connected to each other by a shell shaped vaulted or dished fan disk, which at least partly surrounds the drive motor. Fan disk openings (43) permit at least a portion of cooling air flowing through the drive motor to be discharged through the disk openings (43) into a blower air discharge chamber (23) in the spiral housing. The openings in the fan disk are formed to generate a negative pressure at these openings on a fan disk surface facing away from the drive motor whereby airflow through the motor is increased because the negative pressure draws more cooling air through the motor. The suction is further increased by streamlined hoods (61) covering part of the fan disk openings on the disk surface facing away from the motor. The increased airflow through the drive motor increases the service life of the blower and of the motor.

Dependencies are inferred from the claim text.