Patent ID: 6142864
Filing Date: 2000-11-07
Classification: B60H,F04D

Abstract:
A blower unit comprising:a centrifugal fan;a fan casing forming a scroll-shaped air passage and housing said centrifugal fan, said fan casing including a first and a second case each having a divided face in an axial direction of said centrifugal fan;a first generally planar partition wall for partitioning an interior of said first case into a first passage and a second passage in which different kinds of air flow in the axial direction of said centrifugal fan, respectively, said first planar partition wall extending linearly from a first inner wall surface of said first case to a position radially inside of said centrifugal fan, said first passage having a first axial width defined between a second inner wall surface of said first case and said first planar partitioned wall, said first axial width being constant from said first inner wall surface of said first case to said position radially inside of said centrifugal fan, said second passage having a second annular width defined between a third inner wall surface of said first case and said first planar partition wall, said second axial width being constant from said first inner wall surface of said first case to said position radially inside of said centrifugal fan; anda second generally planar partition wall for partitioning an interior of said second case into said first passage and said second passage in which the different kinds of air flow in the axial direction of said centrifugal fan, respectively, said second planar partition wall extending linearly from a first inner wall surface of said second case to said position radially inside of said centrifugal fan, said first passage having said first axial width defined between a second inner wall surface of said second case and said second planar partitioned wall, said first axial width being constant from said first inner wall surface of said second case to said position radially inside of said centrifugal fan, said second passage having said second annular width defined between a third inner wall surface of said second case and said second planar partition wall, said second axial width being constant from said first inner wall surface of said second case to said position radially inside of said centrifugal fan.