Patent ID: 8056355
Filing Date: 2011-11-15
Classification: B60H

Abstract:
1. A drainage system for an HVAC unit mounted on a vehicle roof panel and over an air inlet opening in the roof panel, the drainage system comprising: a collection recess formed by the roof panel and surrounding the inlet opening; a first wall formed by the roof panel in the collection recess and surrounding the HVAC unit, the first wall having a plurality of spaced apart first gaps formed therein; a second wall formed by the roof panel in the collection recess and surrounding the first wall, the second wall having a plurality of spaced apart second gaps formed therein, the first and second gaps being mis-aligned with respect to each other so that fluid is prevented from flowing in a straight line through both a first gap and a second gap; a plurality of drainage ports formed in the roof panel; and a plurality of drainage grooves formed in the roof panel, each drainage groove communicating the collection recess with a corresponding one of the drainage ports, the walls, gaps and grooves cooperating to communicate fluid from the collection recess to the drainage ports, each drainage groove includes a plurality of dam members formed therein each dam member extending part-way across said drainage groove so as to partially restrict fluid flow through the drainage groove.