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

Claim 8:
9. A refrigerant compressor assembly comprising:
an axial compressor including at least one axial stage, wherein the at least one axial stage includes a first vaneless stage immediately upstream of a second vaneless stage, and wherein the first vaneless stage is configured to rotate in a first rotational direction and the second vaneless stage is configured to rotate in a second rotational direction;
a downstream compressor located fluidly downstream of the axial compressor and including one of a mixed-flow impeller or a centrifugal impeller; and
at least one motor in driving engagement with at least one of the axial compressor and the downstream compressor, wherein that at least one motor includes a first motor for driving the first vaneless stage and a second motor for driving the second vaneless stage, and wherein the second motor drives the downstream compressor.