Patent ID: 9541084
Date: 2017-01-10
CPC Classifications: F01C,F04C

Claim:
1. A compressor comprising: a shell defining an opening that receives a suction gas inlet fitting in communication with a suction pressure region disposed within the shell; a bearing housing fixed relative to the shell; a compression mechanism located within the shell, supported on the bearing housing and in communication with the suction pressure region, the compression mechanism including an orbiting scroll and a non-orbiting scroll that include spiral wraps defining compression pockets therebetween, at least one of the orbiting scroll and the non-orbiting scroll defining an intermediate passage that provides communication between the compression pockets and an intermediate pressure region disposed within the shell, the intermediate pressure region defined by the bearing housing, an end plate of the orbiting scroll and a hub of the orbiting scroll that extends axially from the end plate; a capacity modulation assembly including a first control valve, a first line, and a second line, the first line extending between the suction pressure region and the first control valve, the second line extending between the intermediate pressure region and the first control valve, the first control valve selectively opening to provide communication between the intermediate pressure region and the suction pressure region and thereby separate the orbiting scroll and the non-orbiting scroll to reduce the capacity of the compressor; and a suction valve assembly that includes a cap and a spring, the spring biasing the cap toward an end surface of the suction gas inlet fitting, the cap preventing communication between the suction gas inlet fitting and the suction pressure region when the cap engages the end surface of the suction gas inlet fitting.