US 11,942,851 B2
Hermetic motor cooling system
Katelynn Louise Crissman, New Freedom, PA (US); Ian Michael Casper, York, PA (US); David Andrew Bradshaw, Timonium, MD (US); Matthew Lee Heisey, York, PA (US); Tyler Alexander Wolgemuth, New Freedom, PA (US); and Paul William Snell, York, PA (US)
Assigned to Tyco Fire & Security GMBH, Neuhausen am Rheinfall (CH)
Appl. No. 16/755,108
Filed by Johnson Controls Technology Company, Auburn Hills, MI (US)
PCT Filed Oct. 10, 2018, PCT No. PCT/US2018/055271
§ 371(c)(1), (2) Date Apr. 9, 2020,
PCT Pub. No. WO2019/075105, PCT Pub. Date Apr. 18, 2019.
Claims priority of provisional application 62/611,358, filed on Dec. 28, 2017.
Claims priority of provisional application 62/610,782, filed on Dec. 27, 2017.
Claims priority of provisional application 62/570,535, filed on Oct. 10, 2017.
Prior Publication US 2020/0240677 A1, Jul. 30, 2020
Int. Cl. H02K 1/20 (2006.01); F25B 31/00 (2006.01); H02K 5/20 (2006.01); H02K 9/19 (2006.01); F25B 1/04 (2006.01); F25B 49/02 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 1/20 (2013.01); H02K 9/19 (2013.01); F25B 1/04 (2013.01); F25B 31/006 (2013.01); F25B 49/025 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A system for cooling a hermetic motor, comprising:
a motor cooling refrigerant flow path configured to direct refrigerant from a condenser disposed along a refrigerant loop to the hermetic motor, and from the hermetic motor back to the refrigerant loop;
a housing of the hermetic motor disposed along the motor cooling refrigerant flow path and configured to receive the refrigerant from the condenser, wherein the housing of the hermetic motor comprises a first annulus formed therein and surrounding at least a first portion of a stator of the hermetic motor and a second annulus formed therein and surrounding at least a second portion of the stator, wherein the housing is configured to direct a first flow of the refrigerant into the first annulus and to direct a second flow of the refrigerant into the second annulus; and
a sleeve disposed between the stator and the housing, wherein the first annulus is fluidly separate from the second annulus via a seal disposed between the housing and the sleeve and between the first annulus and the second annulus, wherein the sleeve comprises a plurality of openings formed therein, wherein the plurality of openings is configured to direct the first flow of the refrigerant from the first annulus toward the stator to directly contact the stator and then flow directly into a cavity of the housing of the hermetic motor, wherein each opening of the plurality of openings extends from the first annulus and through the sleeve, and wherein the housing of the hermetic motor comprises an outlet configured to direct the first flow of the refrigerant from the cavity of the housing toward an evaporator disposed along the refrigerant loop.