Patent ID: 6896478
Filing Date: 2005-05-24
Classification: F04D

Abstract:
1. A dual fan blower module comprising: a housing defining a central motor compartment and first and second scroll chambers, said scroll chambers being axially aligned with and located on opposite sides of said motor compartment; a motor mounted within said motor compartment and having first and second shaft ends extending axially therefrom, said first shaft end extending into said first scroll chamber and said second shaft end extending into said second scroll chamber; a first fan mounted onto said first shaft end within said first scroll chamber for rotational movement within said first scroll chamber and a second fan mounted onto said second shaft end within said second scroll chamber for rotational movement within said second scroll chamber; each of said first and second scroll chambers including an expansion channel extending axially inward from said scroll chambers toward said motor; each of said scroll chambers further including an air inlet side having an inlet adapted to allow air to enter said scroll chambers, a bottom side opposite said air inlet side, and a generally cylindrical, curved wall with increasing radius, between the air inlet side and the bottom side, thereby defining a volute chamber through which a volume of air passes, said scroll chambers terminating in an exit and defining a cut-off edge, each of said expansion channels having a start point and extending radially about said scroll chambers from said start point to said exit.