Patent ID: 8776539

Claim:
A system comprising: a first compressor; a heat rejection heat exchanger coupled to the first compressor to receive refrigerant compressed by the first compressor; an ejector having: a primary inlet coupled to the heat rejection heat exchanger to receive refrigerant; a secondary inlet; and an outlet; a separator having: an inlet coupled to the outlet of the ejector to receive refrigerant from the ejector; a gas outlet coupled to the first compressor to return refrigerant to the first compressor; and a liquid outlet coupled to the secondary inlet of the ejector to deliver refrigerant to the ejector; a heat absorption heat exchanger between the liquid outlet of the separator and the ejector secondary inlet; and a second compressor between the heat absorption heat exchanger and the ejector secondary inlet, wherein the ejector is a first ejector and the separator is a first separator and the system further comprises: a second separator having: an inlet; a gas outlet coupled to the secondary inlet of the first ejector via the second compressor; and a liquid outlet; and a second ejector having: a primary inlet coupled to the liquid outlet of the first separator to receive refrigerant; a secondary inlet coupled to the outlet of the heat absorption heat exchanger; and an outlet coupled to the inlet of the second separator.