Patent ID: 11965514
Assignee: CARRIER CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 9:
10. A method of operating a refrigerant compressor assembly comprising the steps of:
compressing a refrigerant with an axial compressor including at least one axial stag; wherein the at least one axial stage includes at least a first vaneless stage and a second vaneless stage;
compressing the refrigerant with a downstream compressor located fluidly downstream of the axial compressor and the downstream compressor includes one of a mixed-flow impeller or a centrifugal impeller;
driving the axial compressor and the downstream compressor with at least one motor, wherein the at least one motor is axially spaced from the mixed-flow impeller or the centrifugal impeller; and
wherein the at least one motor comprises at least a first motor and a second motor, and including driving the first vaneless stage and the downstream compressor in a first rotational direction with the first motor, and driving the second vaneless stage in a second rotational direction with the second motor.