Patent ID: 11879460
Assignee: COPELAND LP
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 11:
12. A compressor comprising:
a shell assembly;
a first scroll disposed within the shell assembly and including a first end plate and a first spiral wrap extending from the first end plate;
a second scroll disposed within the shell assembly and including a second end plate and a second spiral wrap extending from the second end plate, the first and second spiral wraps meshing with each other and forming a plurality of compression pockets therebetween, wherein the compression pockets include a suction-pressure compression pocket, a discharge-pressure compression pocket at a higher pressure than the suction-pressure compression pocket, and a plurality of intermediate-pressure compression pockets at respective pressures between the pressures of the suction and discharge compression pockets, wherein the second end plate includes an outer port and an inner port, wherein the outer port is disposed radially outward relative to the inner port, wherein the outer port is configured to receive working fluid from a first one of the intermediate-pressure compression pockets, and wherein the inner port is configured to receive working fluid from a second one of the intermediate-pressure compression pockets;
an axial biasing chamber disposed within the shell assembly, wherein working fluid disposed within the axial biasing chamber axially biases one of the first and second scrolls toward the other of the first and second scrolls; and
a control valve in fluid communication with the inner port, the outer port, and the axial biasing chamber,
wherein:
the control valve is movable between a first position and a second position,
movement of the control valve into the first position allows fluid communication between the inner port and the axial biasing chamber while preventing fluid communication between the outer port and the axial biasing chamber,
movement of the control valve into the second position allows fluid communication between the outer port and the axial biasing chamber while preventing fluid communication between the inner port and the axial biasing chamber, and
the control valve includes a valve body and a valve member movable relative to the valve body between the first and second positions, and wherein the valve body includes a first port, a second port, a third port, a fourth port, a fifth port, and a sixth port.