Refrigeration – Refrigeration producer – With lubricant handling means
Patent
1977-11-07
1979-02-27
Novosad, Stephen J.
Refrigeration
Refrigeration producer
With lubricant handling means
62471, 62503, F25B 102, F25B 3100, B25B 4302
Patent
active
041412230
ABSTRACT:
The invention relates to an encapsulated refrigerator assembly of the type in which an integrated motor and compressor unit is resiliently mounted in a hermetically sealed casing or capsule. An oil sump at the bottom of the capsule is provided for lubricating oil. An externally disposed centrifugal separator with an oil collecting tank at the bottom thereof provides refrigerant in vapor form for the compressor and oil for the oil sump. The compressor has a main inlet for receiving refrigerant vapor from the separator and a throttled inlet for receiving refrigerant vapor which is present in the capsule and which entered entrained in the oil received from the separator. The capsule has a single port and two tubes extend from this single port to the separator. An outer tube provides fluid communication between the separator oil collecting tank and the interior of the capsule houses the motor and compressor unit. A second or inner tube inside the outer tube is spaced therefrom and provides fluid communication between separator vapor outlet and the inlet of the compressor. The throttled compressor inlet has a large enough throttling resistance relative to the characteristics of a liquid refrigerant so that no more than harmless small amounts of liquid refrigerant in the interior space of the capsule can pass through the throttled compressor inlet under the suction force of the compressor unit. The capsule interior may be considerably filled with liquid refrigerant in the as-delivered condition but the throttling feature referred to will prevent refrigerant in a liquid state from being sucked into the compressor inlet.
REFERENCES:
patent: 2074323 (1937-03-01), Borgerd
patent: 2597243 (1952-05-01), Hubacker et al.
patent: 2813404 (1957-11-01), Hirsch
patent: 3154245 (1964-10-01), Roelsgaard
patent: 3163999 (1965-01-01), Ditzler et al.
patent: 4057979 (1977-11-01), Abell et al.
Dyhr Jan
Nissen Ole J.
Danfoss A/S
Easton Wayne B.
Novosad Stephen J.
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