Compressor having capacity modulation system

A compressor comprising:

• a housing;
• a non-orbiting scroll member supported within said housing and including a first end plate having a discharge passage, a first spiral wrap extending from a first side of said first end plate, and a plurality of apertures extending through said first end plate;
• an orbiting 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 suction pocket, a discharge pocket and intermediate pockets during orbital displacement of said orbiting scroll member relative to said non-orbiting scroll member, said plurality of apertures being in communication with said intermediate pockets;
• and
• a modulation assembly located within said housing and in communication with said plurality of apertures, said modulation assembly operable in a full capacity mode where said plurality of apertures are isolated from a suction pressure region of the compressor to operate the compressor at a full capacity during orbital displacement of said orbiting scroll member relative to said non-orbiting scroll member and operable in a reduced capacity mode where said intermediate pockets are in communication with said suction pressure region via said plurality of apertures to operate the compressor at approximately zero capacity during orbital displacement of said orbiting scroll member relative to said non-orbiting scroll member.

A compressor comprising:

• a housing;
• a first scroll member supported within said housing and including a first end plate having a discharge passage, a first spiral wrap extending from a first side of said first end plate, and a first aperture extending through said first end plate;
• 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 pockets during orbital displacement of said second scroll member relative to said first scroll member, said first aperture being in communication with a first of said pockets;
• and
• a modulation assembly located within said housing and in communication with said first aperture, said modulation assembly operable in a full capacity mode during orbital displacement of said second scroll member relative to said first scroll member with said first aperture isolated from a suction pressure region of the compressor to operate the compressor at a full capacity and operable in a reduced capacity mode during orbital displacement of said second scroll member relative to said first scroll member with said first aperture in communication with said suction pressure region to operate the compressor at approximately zero capacity while said pockets are isolated from one another between said first and second end plates by said first and second spiral wraps.