Injection cooling arrangement for rotary compressor

Details Injection cooling arrangement for rotary compressor Injection cooling arrangement for rotary compressor

1975-04-07

1976-03-23

O'Dea, William

Refrigeration

Refrigeration producer

Compressor-condenser-evaporator circuit

418 63, 418 97, F25B 3100

Patent

active

039452204

ABSTRACT:
Liquid refrigerant is injected into the high-pressure side of a rotary compressor so as to cool the refrigerant being compressed to allow it to be useful in cooling the compressor motor. The injection port is located on the bottom face of the compressor chamber, within an area removed from the compressor chamber wall, immediately adjacent the compressor chamber discharge. The feed to the injection port is through a larger tube containing two non-connected capillaries, the first capillary being connected to the inlet of the tube and the second capillary being connected to the injection port. In this manner, a column of liquid remains in the second capillary. The combination of the placement of the injection port and the form of the inlet tubing to the injection port prevents liquid from being carried over into the suction side of the compressor, where efficiency and economy would be diminished, avoids the necessity for a check valve in the suction line to the compressor chamber, and allows for the parts of the compressor chamber to be used with varying compressor rollers without remachining.

REFERENCES:
patent: 2669384 (1954-02-01), Dills
patent: 2883101 (1959-04-01), Kosfeld
patent: 3105633 (1963-10-01), Dellario
patent: 3109297 (1963-11-01), Rinehart

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