US 11,988,420 B2
Refrigerant compressor having dedicated inlets for stator and rotor cooling lines
Tianli Zhang, Ann Arbor, MI (US); and Jin Yan, Tallahassee, FL (US)
Assigned to DANFOSS A/S, Nordborg (DK)
Filed by DANFOSS A/S, Nordborg (DK)
Filed on Jan. 13, 2022, as Appl. No. 17/574,813.
Claims priority of provisional application 63/145,009, filed on Feb. 3, 2021.
Prior Publication US 2022/0243965 A1, Aug. 4, 2022
Int. Cl. F25B 31/02 (2006.01); F04D 25/06 (2006.01); H02K 1/30 (2006.01); H02K 5/20 (2006.01); H02K 9/06 (2006.01)
CPC F25B 31/026 (2013.01) [F04D 25/06 (2013.01); H02K 1/30 (2013.01); H02K 5/207 (2021.01); H02K 9/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A refrigerant compressor, comprising:
an impeller;
a shaft;
a motor configured to rotate the impeller via the shaft, wherein the motor includes a stator and a rotor; and
a housing surrounding the motor, wherein the housing includes a first inlet configured to permit fluid to enter the housing and flow along a stator cooling line and a second inlet configured to permit fluid to enter the housing and flow a rotor cooling line, and wherein the first inlet is separate from the second inlet,
wherein the housing includes a main portion extending generally from a first location adjacent the impeller to a second location on an opposite side of the motor as the impeller, an end cap adjacent the second location and enclosing a first end of the main portion, and a wall adjacent the first location and providing a boundary between the motor and the impeller,
wherein the main portion includes both the first inlet and the second inlet, and
wherein the end cap includes an outlet, and wherein the refrigerant compressor is configured such that fluid flowing along both the stator and rotor cooling lines exits the refrigerant compressor via the outlet.