Radial blower for a leaf and waste collection/removal apparatus with operating noise suppression means

摘要

The radial blower for a leaf and waste vacuum apparatus, a leaf and waste blower apparatus or a leaf and waste loading apparatus has a Helmholz resonator (14) for damping or attenuating sound generated by the blower. The Helmholtz blower (14) is connected to the sound conducting flow duct (12) of the blower (10) with a connector pipe (13). The sound resonance eigenfrequencies are adjusted by changing the cross-sectional area (A) of the connector pipe (13), the length (l) of the connector pipe (13) and/or the volume (V) of the Helmholz resonator.