Fan and housing
First Claim
1. In combination, a fan and air-guide housing adapted to support a motor and move air through a heat exchanger, said combination comprising:
- a fan hub connectable to said motor for rotation on a central axis;
a plurality of elongated blades extending radially outwardly from said hub, each of said blades comprising a surface that is pitched with respect to said axis, so that rotation of said hub causes airflow in a direction generally oblique to said axis;
a circumferential band which connects the tips of said blades and extends about said axis concentrically with said hub;
a housing extending downstream from a region radially outward of said band, anda plurality of plastic elongated stationary members positioned downstream of said fan blades and extending from said housing radially inwardly to a means for supporting said fan motor, each of said members comprising a flow-control surface oblique to said airflow direction, and said member surfaces being positioned and configured so that, at least at the region of greatest air-flow velocity, the nose-tail line of said surfaces intersects said airflow direction at an angle substantially equal to the angle between said nose-tail line and a line parallel to the fan axis, said member surfaces having a total area of at least 30% of the area of said fan blade surface area,whereby said flow control surfaces deflect said airflow axially.
3 Assignments
0 Petitions
Accused Products
Abstract
A circumferentially banded fan that forces air through an adjacent heat exchanger and that has an air-guide housing positioned radially outside the band and extending downstream therefrom is disclosed. A plurality of elongated stationary members extend radially inwardly from the housing downstream from the fan blades, and the stationary members have a flow-control surface which removes the rotational component imparted to the airflow by the rotating fan blades. A tangent to the flow control surfaces at their radial center line forms an angle with the airflow exiting the blades which is substantially equal to the tangent-to-axis angle.
191 Citations
13 Claims
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1. In combination, a fan and air-guide housing adapted to support a motor and move air through a heat exchanger, said combination comprising:
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a fan hub connectable to said motor for rotation on a central axis; a plurality of elongated blades extending radially outwardly from said hub, each of said blades comprising a surface that is pitched with respect to said axis, so that rotation of said hub causes airflow in a direction generally oblique to said axis; a circumferential band which connects the tips of said blades and extends about said axis concentrically with said hub; a housing extending downstream from a region radially outward of said band, and a plurality of plastic elongated stationary members positioned downstream of said fan blades and extending from said housing radially inwardly to a means for supporting said fan motor, each of said members comprising a flow-control surface oblique to said airflow direction, and said member surfaces being positioned and configured so that, at least at the region of greatest air-flow velocity, the nose-tail line of said surfaces intersects said airflow direction at an angle substantially equal to the angle between said nose-tail line and a line parallel to the fan axis, said member surfaces having a total area of at least 30% of the area of said fan blade surface area, whereby said flow control surfaces deflect said airflow axially. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification