Refrigeration – Refrigeration producer – Compressor-condenser-evaporator circuit
Patent
1978-01-03
1980-01-08
Capossela, Ronald C.
Refrigeration
Refrigeration producer
Compressor-condenser-evaporator circuit
310 61, F25B 3100
Patent
active
041821378
ABSTRACT:
A cooling system having an electric drive motor utilizes a portion of the sub-cooled liquid which would otherwise be passed from the condenser through an expansion device to the evaporator to cool the motor. The rotor cooling passage which extends longitudinally through the outer portion of the rotor has its outermost surface (that is, the surface farthest removed from the center of the motor) shaped in an arc having the same center as the center of the rotor. This ensures even distribution of the cooling liquid under the high centrifugal forces developed during motor operation. The stator has a passage from its outside surface inwardly to the longitudinal cooling portion of the stator. The inwardly extending passage includes an orifice, sufficiently large to prevent contamination problems but of an appropriate size to ensure good throttling and thus provide good heat transfer. The cross-sectional areas of the cooling passages are sized to minimize the velocity of the generated vapor.
REFERENCES:
patent: 2891391 (1959-06-01), Kocher et al.
patent: 3217193 (1965-11-01), Rayner
patent: 3388559 (1968-06-01), Johnson
patent: 3422635 (1969-01-01), Trenkowitz
patent: 3805547 (1974-04-01), Eber
Borg-Warner Corporation
Capossela Ronald C.
Jennings, Jr. James J.
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