Patent ID: 11885543
Assignee: CARRIER CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A method of shutting down or defrosting within a refrigeration system having a compressor, condenser, expansion valve and evaporator, the method, comprising:
initiating a shutdown process or a defrost process of the refrigeration system;
closing a first valve within a refrigerant circuit of the refrigeration system;
operating a compressor within the refrigerant circuit;
detecting a suction pressure within the refrigerant circuit;
closing a second valve within the refrigerant circuit of the refrigeration system when the suction pressure is below a threshold suction pressure; and
stopping operation of the compressor;
wherein the first valve is located within the refrigerant circuit between a condenser and an evaporator, and wherein closing the first valve stops flow of refrigerant from the condenser to the evaporator;
wherein the second valve is located within the refrigerant circuit between the compressor and a condenser, and wherein closing the second valve, when the suction pressure is below a threshold suction pressure, stops flow of refrigerant from the compressor to the condenser.