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

Claim 15:
16. A method of operating a refrigerant compressor assembly comprising the steps of:
compressing a refrigerant with an axial compressor including at least one axial stage, and wherein the axial compressor includes at least a first vaneless stage and a second vaneless stage;
driving the first vaneless stage in a first rotational direction with a first motor and driving the second vaneless stage in a second rotational direction with a second motor; and
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, and wherein the downstream compressor is driven by the second motor.