Patent ID: 11942851
Assignee: TYCO FIRE & SECURITY GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 8:
9. A heating, ventilating, air conditioning, and refrigeration (HVAC&R) system, comprising:
a refrigerant loop;
a compressor disposed along the refrigerant loop and configured to circulate refrigerant within the refrigerant loop;
a condenser disposed downstream of the compressor along the refrigerant loop with respect to a flow direction of the refrigerant within the refrigerant loop;
an evaporator disposed downstream of the condenser along the refrigerant loop with respect to the flow direction of the refrigerant within the refrigerant loop;
a hermetic motor configured to drive the compressor; and
a motor cooling system, comprising:
a motor cooling refrigerant flow path configured to direct a portion of the refrigerant from the condenser to the hermetic motor, and from the hermetic motor to the evaporator;
a housing of the hermetic motor disposed along the motor cooling refrigerant flow path and configured to receive the portion of 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 portion of the refrigerant into the first annulus and to direct a second flow of the portion of the refrigerant into the second annulus; and
a sleeve disposed between the stator and the housing, wherein the first annulus and the second annulus are fluidly separated from one another via a seal disposed between the first annulus and the second annulus and between the housing and the sleeve, wherein the sleeve comprises a plurality of openings formed therein, wherein the plurality of openings is configured to direct the first flow of the portion of the refrigerant from the first annulus to directly contact the stator and flow into a cavity of the housing of the hermetic motor, and wherein each opening of the plurality of openings extends from the first annulus and through the sleeve.