System and method for detection and correction of reverse flow in an ejector refrigeration circuit

A system for detection and correction of reverse flow in an ejector refrigeration circuit, the system comprising:

• a plurality of ejectors, each of the plurality of ejectors having a primary high pressure input port, a secondary low pressure input port, and an output port;
• a plurality of first sensors, each of the plurality of first sensors adapted to measure an ejector suction superheat of a refrigerant at the secondary low pressure input port of a corresponding ejector from the plurality of ejectors;
• at least one second sensor located along a refrigerating evaporator flow path between at least one refrigerant evaporator and the secondary low pressure input port, the at least one second sensor adapted to measure a superheat of the refrigerant upstream relative to the secondary low pressure input port;
• and
• a controller adapted to:
• receive the ejector suction superheats measured by the plurality of first sensors and the refrigerant superheat measured by the at least one second sensor;
• determine whether a superheat difference between each of the ejector suction superheats and the refrigerant superheat falls below a threshold superheat difference;
• identify a first ejector from the plurality of ejectors as a reverse flow affected ejector based on the determined superheat difference;
• determine a second ejector from the plurality of ejectors by comparing opening percentages of the plurality of ejectors, wherein the second ejector comprises the largest opening percentage;
• increase the opening percentage of the first ejector and reduce the opening percentage of the second ejector to increase a refrigerant flow rate of the first ejector.