Centrifugal blower assembly with a pre-swirler for an automotive vehicle
First Claim
Patent Images
1. A centrifugal blower assembly, comprising:
- a fan wheel having a plurality of fan blades disposed between a fan ring and a fan hub;
a motor having a rotating shaft projecting therefrom and into engagement with said fan hub, said motor being operative to rotate said fan wheel about an axis coincident with the axis of said rotating shaft;
a housing for receiving said fan wheel and motor therein, said housing having an air inlet side, a motor receiving side opposite said air inlet side and a generally curved wall extending between the air inlet side and motor receiving side and thereby defining a chamber through which a volume of air passes, said air inlet side of said housing including;
a generally circular inlet ring having a predetermined axial length and defining an inlet aperture through which air is drawn by rotation of said fan wheel;
an generally circular inner ring disposed a predetermined distance radially inwardly from said inlet ring; and
a plurality of stationary guide vanes disposed between said inner ring and said inlet ring generally parallel to the axis of rotation of said fan wheel, said plurality of guide vanes each having a predetermined axial length and including an inlet angle and a variable exit angle along a trailing edge of said guide vanes and wherein the axial length of each of said guide vanes is substantially equal to said axial length of said inlet ring.
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Abstract
A centrifugal blower assembly is disclosed. The blower assembly includes a centrifugal fan driven by an electric motor. The blower assembly housing includes a pre-swirler having a plurality of guide vanes which impart a predetermined amount of rotation to a volume of air as the air enters the centrifugal blower assembly. The guide vanes are disposed in a ring at the air inlet of the blower housing.
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Citations
16 Claims
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1. A centrifugal blower assembly, comprising:
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a fan wheel having a plurality of fan blades disposed between a fan ring and a fan hub; a motor having a rotating shaft projecting therefrom and into engagement with said fan hub, said motor being operative to rotate said fan wheel about an axis coincident with the axis of said rotating shaft; a housing for receiving said fan wheel and motor therein, said housing having an air inlet side, a motor receiving side opposite said air inlet side and a generally curved wall extending between the air inlet side and motor receiving side and thereby defining a chamber through which a volume of air passes, said air inlet side of said housing including; a generally circular inlet ring having a predetermined axial length and defining an inlet aperture through which air is drawn by rotation of said fan wheel; an generally circular inner ring disposed a predetermined distance radially inwardly from said inlet ring; and a plurality of stationary guide vanes disposed between said inner ring and said inlet ring generally parallel to the axis of rotation of said fan wheel, said plurality of guide vanes each having a predetermined axial length and including an inlet angle and a variable exit angle along a trailing edge of said guide vanes and wherein the axial length of each of said guide vanes is substantially equal to said axial length of said inlet ring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A centrifugal blower assembly for an automotive vehicle, comprising:
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a centrifugal fan wheel having a plurality of fan blades disposed between a fan ring and a fan hub; a motor having a rotating shaft projecting therefrom and into engagement with said fan hub, said motor being operative to rotate said fan wheel about an axis coincident with the axis of said rotating shaft; a housing for receiving said fan wheel and motor therein, said housing having an air inlet side, a motor receiving side opposite said air inlet side and a generally curved wall extending between the air inlet side and motor receiving side and thereby defining a chamber through which a volume of air passes, said air inlet side of said housing including; a generally circular inlet ring having a predetermined axial length and defining an inlet aperture through which air is drawn by rotation of said fan wheel; an generally circular inner ring disposed a predetermined distance radially inwardly from said inlet ring; and a plurality of stationary guide vanes disposed between said inner ring and said inlet ring generally parallel to the axis of rotation of said fan wheel, said plurality of guide vanes each having a predetermined axial length extending axially below said axial length of said inlet ring, and including a constant inlet angle and a variable exit angle along a trailing edge of said guide vanes. - View Dependent Claims (12, 13, 14)
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15. An apparatus for imparting a rotation to a volume of air entering a centrifugal blower rotatable about an axis of rotation, comprising:
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a generally circular inlet ring having a predetermined axial length and a predetermined diameter; a generally circular inner ring having a diameter smaller than the diameter of said inlet ring and being disposed co-planar therewith and radially inwardly therefrom; an annular region defined between said inlet ring and said inner ring; and a plurality of stationary guide vanes disposed between said inner ring and said inlet ring, said plurality of guide vanes each having a predetermined axial length extending axially below said axial length of said inlet ring, and including a constant inlet angle and a variable exit angle along a trailing edge of said guide vanes. - View Dependent Claims (16)
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Specification