Patent ID: 9657969
Date: 2017-05-23
CPC Classifications: B64D,F25B,Y02T

Claim:
1. A multi-evaporator cooling system, comprising: a compressor circuit that generates multiple levels of evaporating pressures, the circuit comprising at least one compressor configured to compress a refrigerant to a first pressure; a heat exchanger configured to receive the compressed refrigerant from the at least one compressor and cool the compressed refrigerant; a first evaporator circuit configured to receive the compressed refrigerant from the heat exchanger, expand the compressed refrigerant to a second pressure that is lower than the first pressure, and return the refrigerant to the compressor circuit; and a second evaporator circuit configured to receive the compressed refrigerant from the heat exchanger, expand the compressed refrigerant to a third pressure that is lower than the second pressure, and return the refrigerant to the compressor circuit; wherein the first and second evaporator circuits each comprise a respective expansion device and heat load heat exchanger, wherein refrigerant from each heat load heat exchanger passes to a respective first and second ejector at approximately the respective second and third pressures, expands in each of the first and second ejectors, and passes to an inlet of a compressor of the at least one compressor circuit.