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

Claim 18:
19. 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;
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 axial biasing chamber,
wherein:
the control valve includes a valve body and a valve member movable relative to the valve body between a first position and a second position,
the valve body includes a first port, a second port, a third port, a fourth port, a fifth port, and a sixth port,
the valve member includes a first plug, a second plug, a third plug, and a fourth plug,
the first, second, third, and fourth plugs are movable together between the first and second positions,
the first plug closes an end of the third port in the first position and opens the end of the third port in the second position,
the second plug opens an end of the second port in the first position and closes the end of the second port in the second position,
the third plug closes an end of the fourth port in the first position and opens the end of the fourth port in the second position,
the fourth plug opens an end of the fifth port in the first position and closes the end of the fifth port in the second position, and
the valve body includes a first cavity and a second cavity that are fluidly separated from each other, wherein the first cavity is fluidly connected with the first,
second, and third ports, and wherein the second cavity is fluidly connected with the fourth, fifth, and sixth ports.