US 11,867,199 B2
Compressor with motor cooling impeller
Debabrata Pal, Hoffman Estates, IL (US); and Ashutosh Joshi, Roscoe, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Apr. 12, 2022, as Appl. No. 17/718,967.
Prior Publication US 2023/0323896 A1, Oct. 12, 2023
Int. Cl. F04D 29/58 (2006.01); F04D 25/06 (2006.01); F04D 29/28 (2006.01); F04D 17/12 (2006.01)
CPC F04D 29/5806 (2013.01) [F04D 17/12 (2013.01); F04D 25/06 (2013.01); F04D 29/284 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A compressor system comprising:
a compressor, and an electric motor driving a shaft to drive said compressor;
an inlet to be connected to a source of air to be compressed;
said inlet connected to said compressor;
a fan impeller mounted in the inlet upstream of the compressor;
a cooling air exit communicating with said inlet upstream of the compressor, said cooling air exit connected to said motor to provide cooling air to said motor; and
wherein said cooling air exit has an inlet to said motor which is tangential relative to an outer housing of said motor.