| 摘要 |
A protective housing is provided for a heating, ventilation, and air conditioning (HVAC) unit having a fan therein. The fan comprises a plurality of blades, each blade having a proximal and distal end. The housing comprises a plurality of side panels, each side panel comprising openings enabling airflow into the housing. The housing further comprises an access panel that is coupled between two of the plurality of side panels wherein the access panel and the plurality of side panels form an enclosure. An orifice ring is mounted within the housing, wherein a running clearance between the distal end of the fan blades and the orifice ring has a first spacing. A cover fastens atop the enclosure, the cover comprising a grill having a plurality of grill members, wherein the grill members are separated by a second spacing, the second spacing being smaller than the first spacing. |
| 主权项 |
1. A protective housing for a heating, ventilation, and air conditioning (HVAC) unit having a fan therein, said fan comprising a plurality of fan blades each blade having a proximal and distal end, the housing comprising:
a plurality of side panels, each side panel comprising openings enabling airflow into the housing; an access panel, said access panel coupled between two of the plurality of side panels, wherein said access panel and said plurality of side panels form an enclosure; an orifice ring mounted within said housing, wherein a running clearance between said distal ends of said fan blades and said orifice ring has a first spacing; a cover fastened atop the enclosure, said cover comprising a grill having a plurality of grill members, wherein said grill members are separated by a second spacing, which is smaller than the first spacing; and a relief air vent, said relief air vent extending over said orifice ring, through an opening formed in the access panel, and extending beneath said cover. |
