Cooling circuits for compressors and compressors including same

A compressor system comprising:

• a compressor housing;
• a shaft rotationally supported by one or more bearings within the compressor housing;
• one or more impellers operably connected to the shaft;
• a motor operably connected to the shaft to drive rotation thereof and compress a working fluid with the one or more impellers;
• and
• a cooling circuit comprising:
• a first coolant inlet passage defined by the compressor housing;
• a second coolant inlet passage defined by the compressor housing;
• and
• a cooling channel defined by the compressor housing and connected in fluid communication with the first and second coolant inlet passages, wherein the cooling channel extends around the motor and includes a first portion and a second portion, wherein the first portion extends from the first coolant inlet passage to a first outlet and the second portion extends from the second coolant inlet passage to a second outlet, wherein each of the first portion and the second portion includes a respective flow resistance coefficient, and wherein a flow resistance coefficient of the first portion is different than a flow resistance coefficient of the second portion.

A compressor system comprising:

• a compressor housing;
• a shaft rotationally supported by one or more bearings within the compressor housing;
• one or more impellers operably connected to the shaft;
• a motor operably connected to the shaft to drive rotation thereof and compress a working fluid with the one or more impellers;
• and
• a cooling circuit comprising:
• a first coolant inlet passage defined by the compressor housing;
• a second coolant inlet passage defined by the compressor housing;
• and
• a cooling channel defined by the compressor housing and connected in fluid communication with the first and second coolant inlet passages, wherein the cooling channel extends around the motor and includes a first portion and a second portion, wherein the first portion extends from the first coolant inlet passage to a first outlet and the second portion extends from the second coolant inlet passage to a second outlet, and wherein a cross-sectional area of the first portion is substantially the same as a cross-sectional area of the second portion, wherein a second outlet area of the second outlet is greater than a first outlet area of the first outlet.