Patent ID: RE40344

Claim:
A scroll-type compressor for handling a working fluid, said compressor comprising: a shell having a suction zone and a discharge zone; a first scroll member disposed in said shell and having a first scroll wrap extending from a first end plate; a second scroll member disposed in said shell and having a second scroll wrap extending from a second end plate, said second scroll wrap being intermeshed with said first scroll wrap to define a plurality of closed pockets; a drive mechanism for causing said second scroll member to orbit with respect to said first scroll member, said plurality of pockets moving from a radial outer position in said suction zone to a central position in said discharge zone; a vapor injection system including a fluid circuit in communication with at least one of said plurality of pockets, said fluid circuit including a fluid passage extending from said one pocket to a position outside said shell for injecting vapor into said one pocket and increasing a capacity of the compressor , said fluid passage extending through said second scroll member; and a valve for controlling fluid flow through said fluid passage.