Patent ID: 9022759
Filing Date: 2015-05-05
Classification: F04C,Y10T

Abstract:
1. A compressor comprising: a housing defining a suction pressure region and a discharge pressure region; a first scroll member supported within said housing and including a first end plate, a first spiral wrap extending from a first side of said first end plate, a first chamber located on a second side of said first end plate having first and second passages in selective communication therewith, and a first aperture extending through said first end plate and in communication with said first chamber; a second scroll member supported within said housing and including a second end plate having a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap to form a series of compression pockets, said first aperture being in communication with one of said compression pockets to provide communication between said compression pocket and said first chamber; and a modulation assembly located within said first chamber and comprising a piston and a movable member, said piston having a manifold defining a first series of apertures, wherein said piston slidably translates between first and second positions along a first cavity of a casing positioned in said first chamber, said casing defining a second series of apertures, wherein in said first position, said first and second series of aperture are fluidly connected causing gas to urge said movable member into a position that precludes said first passage from communicating with said second passage, wherein in said second position, said first and second series of apertures are fluidly disconnected causing said movable member to move into a displaced position allowing gas to be fluidly connected from said first passage to said second passage.