Compressor having capacity modulation assembly

摘要

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region.

主权项

1. A compressor comprising:
a shell assembly defining a suction pressure region and a discharge pressure region; a first scroll member disposed within said shell assembly and including a first end plate having a discharge passage, a first spiral wrap extending from said first end plate and a biasing passage extending through said first end plate; a second scroll member disposed within said shell assembly and including a second end plate having a second spiral wrap extending therefrom, said first and second spiral wraps meshingly engaged with each other and forming a series of pockets therebetween; a seal assembly engaging said first scroll member and isolating said discharge pressure region from said suction pressure region, said seal assembly and said first scroll member defining an axial biasing chamber therebetween, said biasing passage being in communication with a first of said pockets and said axial biasing chamber; a modulation control chamber fluidly coupled with said axial biasing chamber by a first passage; and a modulation control valve fluidly coupled with said modulation control chamber by a second passage and movable between a first position allowing communication between said second passage and said suction pressure region and a second position restricting communication between said second passage and said suction pressure region.