Patent ID: 6773340
Filing Date: 2004-08-10
Classification: B60H

Abstract:
A vehicle air-conditioning duct having an oblong cross-sectional configuration, a first curved portion curved outwardly with respect to the vehicle, a second curved portion connected to the first curved portion and curved rearwardly with respect to the vehicle, and an air outlet formed at a downstream end displaced downstream from the second curved portion, said air-conditioning duct comprising:a top wall, a bottom wall and side walls enclosing an interior space; and at least one constriction formed by first and second projections respectively protruding from the top wall and the bottom wall into the interior space so as to connect the top wall with the bottom wall, said first projection including a first recess protruding from the top wall into the interior space and formed integrally with the top wall, said second projection including a second recess protruding from the bottom wall into the interior space and formed integrally with the bottom wall, said constriction extending continuously in an air flow direction from downstream of the first curved portion to the outlet of the second curved portion to prevent separation of the air stream flowing in the curved portion of said air-conditioning duct and so that a cross-sectional area of the constriction is constant in the air flow direction.