Patent ID: 8114183
Filing Date: 2012-02-14
Classification: B01D,Y10S

Abstract:
1. A single-stage crankcase ventilation coalescer for coalescing a medium having two immiscible phases, namely a continuous phase comprising air and a dispersed phase comprising oil as a fine mist having droplets of about one micron and smaller in diameter, said continuous phase flowing along a flow direction from upstream to downstream, said coalescer consisting essentially of a coalescer element extending axially along an axis and having coalescer media capturing droplets of said dispersed phase, coalescingly growing said droplets into larger drops which further coalesce and grow to form pools that drain, said element having a closed-loop cross-sectional geometrical shape in a plane transverse to said axis and having an inner surface defining an inner cavity and having an outer surface spaced outwardly of said inner surface by the thickness of said element between said inner and outer surfaces, said media having a depth dimension along said thickness, one of said inner and outer surfaces being an upstream surface, the other of said inner and outer surfaces being a downstream surface, wherein said media is unpleated fibrous depth media, said element and said media have an upstream face provided by said upstream surface, and said upstream face has a non-circular geometrical shape in said transverse plane, wherein said axis is horizontal relative to gravity and said continuous phase flows through said inner cavity along said axis, traversely through said inner surface, and traversely through said outer surface, said pools draining vertically through said media, and wherein: where L I is the length of the perimeter of said inner cavity, D A is the area equivalent diameter of said inner cavity, namely where A I is the area of said inner cavity; wherein optionally one or more of the following three criteria are met: