Back pressure control for improved system operative efficiency

Details Back pressure control for improved system operative efficiency Back pressure control for improved system operative efficiency

1995-11-13

1997-02-18

Tanner, Harry B.

Refrigeration

Automatic control

Refrigeration producer

62210, 62470, F25B 4300

Patent

active

056032277

ABSTRACT:
A normally closed valve is located downstream of the oil separator to insure that sufficient oil pressure builds up to lubricate the compressor. The valve is responsive to the differential pressure between discharge and economizer such that throttling takes place over a limited portion of the operating envelope.

REFERENCES:
patent: 2155051 (1939-04-01), Kagi
patent: 3827255 (1974-08-01), Kish
patent: 4653286 (1987-03-01), Huenniger
patent: 5134856 (1992-08-01), Pillis et al.
patent: 5170640 (1992-12-01), Heitmann et al.

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