US 12,000,629 B2
Hybrid cooling systems for hermetic motors
Paul William Snell, York, PA (US); Matthew Lee Heisey, York, PA (US); Tyler Alexander Wolgemuth, Mount Wolf, PA (US); Katelynn Louise Crissman, Harrisonburg, VA (US); Ian Michael Casper, York, PA (US); and David Andrew Bradshaw, Timonium, MD (US)
Assigned to Tyco Fire & Security GmbH, Schaffhausen (CH)
Filed by Tyco Fire & Security GmbH, Schaffhausen (CH)
Filed on Dec. 20, 2019, as Appl. No. 16/723,400.
Prior Publication US 2021/0190395 A1, Jun. 24, 2021
Int. Cl. F25B 31/00 (2006.01); H02K 5/20 (2006.01); H02K 9/04 (2006.01)
CPC F25B 31/006 (2013.01) [H02K 5/20 (2013.01); H02K 9/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hybrid cooling system for a hermetic motor, comprising:
an annular cavity in a motor housing, the annular cavity configured to receive a vapor flow from a main refrigerant circuit;
at least one annulus in the motor housing, the at least one annulus configured to receive a liquid flow from the main refrigerant circuit;
a sleeve disposed within the motor housing adjacent to the annular cavity and the at least one annulus, wherein at least one radial opening is defined through the sleeve and in fluid communication with the annular cavity;
a stator at least partially surrounded by the sleeve;
a gap defined between the stator and a rotor of the hermetic motor;
a vent slot of the stator configured to receive the vapor flow from the annular cavity through the at least one radial opening of the sleeve and direct the vapor flow to the gap; and
an exit path in the motor housing configured to direct an evaporated vapor flow, generated from the liquid flow contacting the stator, and the vapor flow out of the motor housing.