Patent ID: 8342922

Claim:
A blower assembly for an automotive heating, ventilation, and air conditioning unit, the blower assembly comprising: a housing including a first inlet and a second inlet; a blower wheel in selective communication with said first inlet and said second inlet of said housing, said blower wheel having an axis about which said blower wheel rotates; and a door disposed in said housing and movable about an axis of rotation generally parallel to said blower wheel rotational axis between a first position blocking said second inlet placing said blower wheel in fluid communication with said first inlet and a second position blocking said first inlet placing said blower wheel in fluid communication with said second inlet, said door including a plurality of spaced-apart ribs formed on a surface thereof with said ribs having different lengths and defining a plurality of spaces or channels open to air being guided comprising a, a non-straight flow guide that directs air from said first inlet toward said blower wheel when said door is in said first position and that directs air from said second inlet toward said blower wheel when said door is in said second position.