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 and allows a compressor to continue to work without interruption.
Claims5
A method of controlling the compressor oil pressure in the closed circuit system consisting of an evaporator, a suction accumulator with an inlet connected to said evaporator and two outlets one of which is connected to a suction line of said compressor and another connected by the oil return line to said casting of said compressor, a controller which is placed on said oil return line, a regulator with a set-point adjustment connected to said compressor and electrically connected to said controller, and consisting of the following steps:
- feeding refrigerant vapor into the compressor;
- compressing the refrigerant vapor;
- transforming the vapor into a liquid;
- boiling liquid refrigerant in the evaporator;
- separating refrigerant vapor from the mixture of oil and liquid refrigerant;
- feeding vapor refrigerant to the compressor;
- feeding the oil-liquid refrigerant mixture to the compressor;
- monitoring oil pressure in the compressor;
- comparing the value of the oil pressure to an established target value;
- preventing 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 or allowing 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 closed circuit system consisting of a compressor with casting, a suction line, a condenser, an evaporator connected to said suction line of said compressor and to said condenser, a controller placed on said suction line, and a regulator with set-point adjustment connected to said compressor and electrically connected to said controller, and consisting of the following steps:
- feeding refrigerant vapor into the compressor;
- transforming vapor into liquid;
- boiling liquid refrigerant in the evaporator;
- feeding vapor refrigerant to the compressor;
- monitoring oil pressure in the compressor;
- comparing the value of oil pressure to an established target value;
- preventing 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 or allowing 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 closed circuit system consists of a compressor with a casting, a suction line, a condenser, an evaporator, a suction accumulator with an inlet connected by a line to said evaporator and two outlets one of which is connected to said compressor with a suction line, and another is connected to said compressor by returned line, a controller placed on said returned line, and a regulator with set-point adjustment connected to said compressor and electrically connected to said controller.
A closed circuit system consists of a compressor with a casting, a suction line, a condenser, an evaporator connected to said suction line of said compressor and to said condenser, a controller placed on said suction line, a regulator with set-point adjustment to control the oil pressure and connected to said compressor and electrically connected to said controller.
A closed circuit system consists of a compressor with a casting, a suction line, a condenser, an evaporator connected to said suction line of said compressor and to said condenser, a controller placed on the line connecting said condenser with said evaporator, and a regulator with set-point adjustment to control the oil pressure and connected to said compressor and electrically connected to said controller.
Dependencies are inferred from the claim text.