Scroll compressor with vapor injection

Abstract

A compressor may include a shell, an end cap, first and second scrolls, and a first fitting member. The end cap extends from an end of the shell. The first scroll is disposed within the shell and includes a first end plate and a first spiral wrap extending from the first end plate. The second scroll is disposed at least partially within the shell and includes a second end plate and a second spiral wrap extending from the second end plate. The first and second spiral wraps cooperate to define fluid pockets therebetween. The fluid pockets are movable from a radially outer position, a radially intermediate position, and a radially inner position. The second end plate includes a capacity-modulation passage in fluid communication with one of the fluid pockets at the radially intermediate position. The first fitting member includes a first mounting surface mounted to a second mounting surface of the second scroll. The first and second mounting surfaces are disposed at a non-perpendicular angle relative to a longitudinal axis of the shell. The first fitting member includes a passage in fluid communication with the capacity-modulation passage.