Radialgebläse mit einem zur Einstellung der Luftleistung schaltbaren Antrieb

摘要

The invention relates to a radial blower including a rotor carrying blades between an inner perimeter and an outer perimeter, as well as a volute shaped casing, surrounding the rotor and which is provided with an air inlet opening emerging into an intake volume and an air outlet opening connecting the internal volume of the casing with outside. To prevent disturbances from arising in known blowers, an opening is provided connecting the delivery volume from the blower directly to the intake volume and in the form of a gap of annular shape (2) located on the intake side of the casing (1) and which is defined by an inner chassis (5) and an outer chassis (6), its inlet cross-section being small by comparison with the cross-section of the air inlet opening and of the air outlet opening. Application to heating or air-conditioning installations for motor vehicles.