Refrigeration – Processes – Lubricant handling
Patent
1985-09-18
1989-12-26
Wayner, William E.
Refrigeration
Processes
Lubricant handling
62192, 62212, F25B 3100
Patent
active
048889571
ABSTRACT:
A system for refrigeration comprises: a compressor having an inlet, an oil sump, and an outlet; a condenser having an outlet, and an inlet connected to the compressor outlet; an expansion valve operable for controlling refrigerant flow in the system and having an outlet, and an inlet connected to the condenser outlet; an evaporator having an inlet connected to the expansion valve outlet and an outlet connected to the compressor inlet; and a control unit for operating the expansion valve to maintain a predetermined temperature differential between the temperature of oil in the oil sump and the saturated temperature of the refrigerant in the vicinity of the compressor inlet. The temperature differential is selected such that refrigerant in liquid phase in the compressor does not excessively dilute the compressor oil.
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Rheem Manufacturing Company
Wayner William E.
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