HVAC Fan Inlet
First Claim
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1. A fan housing (184) for accommodating a fan (154) rotating about a central axis (500), the fan housing comprising:
- an inlet (212);
a diffuser (202);
an inner diameter (ID) surface (200, 210) facing the central axis; and
an outer diameter (OD) surface (240) facing away from the central axis,wherein, a rim (220) at the inlet has a plurality of apexes (231) and a plurality of nadirs (233).
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Abstract
A fan housing (184) is provided for accommodating a fan (154) rotating about a central axis (500). The fan housing comprises: an inlet (212); a diffuser (202); an inner diameter (ID) surface (200, 210) facing the central axis; and an outer diameter (OD) surface (240) facing away from the central axis. A rim (220) at the inlet has a plurality of apexes (231) and a plurality of nadirs (233).
13 Citations
18 Claims
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1. A fan housing (184) for accommodating a fan (154) rotating about a central axis (500), the fan housing comprising:
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an inlet (212); a diffuser (202); an inner diameter (ID) surface (200, 210) facing the central axis; and an outer diameter (OD) surface (240) facing away from the central axis, wherein, a rim (220) at the inlet has a plurality of apexes (231) and a plurality of nadirs (233). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A fan housing (184) for accommodating a fan (154) rotating about a central axis (500), the fan housing comprising:
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an inlet (212); a diffuser (202); an inner diameter (ID) surface (200, 210) facing the central axis; and an outer diameter (OD) surface (240) facing away from the central axis, wherein; in central longitudinal section, the outer diameter surface has a convex portion; in said central longitudinal section, the inner diameter surface has a convex portion; and at least at a given axial position, respective radial positions of the inner diameter surface and outer diameter surface convex portions vary in the circumferential direction around the central axis.
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17. A climate control outdoor unit (22) comprising:
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a compressor (30) having an electric motor (32); a refrigerant-air heat exchanger (40) coupled to the compressor and extending around a central axis between a first header (120) and a second header (122); a fan housing (184) having a lower inlet (212) and an upper diffuser (202); and an electric fan (42) encircled by the fan housing and positioned to drive an air flow (520) along an air flowpath (521) across the refrigerant-air heat exchanger then through the inlet and out the diffuser, wherein; the fan duct inlet comprises means (230;
232) for limiting an inlet flow separation and reducing inflow non-uniformities about the central axis. - View Dependent Claims (18)
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Specification