Compressor oil pressure control method and unit
AssigneesMikhail Levitin, Boris Khaytin
InventorsMikhail Levitin, Boris Khaytin
Life of this patent
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Abstract
The present invention relates to the art of refrigeration and more particularly to a method of regulating the cooling process by controlling the oil pressure in a compressor. The system prevents the accumulation of the liquid refrigerant in the crankcase of the compressor. The system allows a compressor to continue to work without interruption.
Claims5
A method of controlling the compressor oil pressure in the unit consisting of a connected series, a compressor, a condenser, an evaporator, a suction accumulator with an inlet connected to said evaporator with a line and two outlets. One of the outlets is connected to said compressor with a suction line and another is connected to said compressor by a return line. A controller is placed on the return line and a regulator with a set-point adjustment is connected to said compressor electrically. The said controller is designed to:
- feed refrigerant vapor into the compressor;
- compress the refrigerant vapor;
- transform the vapor into a liquid;
- boil liquid refrigerant in the evaporator;
- separate refrigerant vapor from the mixture with oil and liquid refrigerant;
- feed vapor refrigerant to the compressor;
- feed the oil-liquid refrigerant mixture to the compressor;
- monitor oil pressure in the compressor;
- compare the value of the oil pressure to an established target value;
- prevent the entrance of oil-liquid refrigerant mixture into the compressor if the value of the oil pressure in the compressor corresponds to a value installed on a set-point adjustment,
- allow the entrance of oil-liquid refrigerant into the compressor if the oil pressure in the compressor is more than the value installed on the set-point adjustment.
A method of controlling the compressor oil pressure in the unit consisting of a connected series, a compressor, a condenser, an evaporator, connected to said compressor by a suction line, a controller placed on the suction line, and a regulator with a set-point adjustment connected to said compressor electrically. The controller is designed to:
- feed refrigerant vapor into the compressor;
- transform vapor into liquid;
- boil liquid refrigerant in the evaporator;
- feed vapor refrigerant to the compressor;
- monitor oil pressure in the compressor;
- compare the value of oil pressure to an established target value;
- prevent the entrance of oil-refrigerant vapor mixture into the compressor if the value of the oil pressure in the compressor corresponds to a value installed on a set-point adjustment;
- allow the entrance of oil-refrigerant vapor into the compressor if the oil pressure in the compressor is more than the value installed on a set-point adjustment.
A unit consisting of a connected series of a compressor, a condenser, an evaporator, a suction accumulator with an inlet connected by a line to said evaporator, and two outlets. One of the outlets is connected to said compressor with a suction line and another is connected to said compressor by a return line. A controller is placed on the return line and a regulator with a set-point adjuster is connected to said compressor and electrically to said controller.
A unit consisting of a connected series of a compressor, a condenser, an evaporator connected to said compressor with a suction line, a controller placed on the suction line and a regulator with a set-point adjuster connected to said compressor and electrically connected to said controller.
A unit consisting of a connected series of a compressor, a condenser, an evaporator connected to said compressor with a suction line, a controller placed on the line connecting said condenser with said evaporator, and a regulator with a set-point adjuster connected to said compressor and electrically connected to said controller.
Dependencies are inferred from the claim text.