Patent ID: 6910343
Filing Date: 2005-06-28
Classification: B60H,F25B

Abstract:
1. A vapor-compression refrigerant cycle comprising: a compressor for discharging a high-pressure refrigerant; a high-pressure heat exchanger for radiating heat of the high-pressure refrigerant discharged from the compressor; a low-pressure heat exchanger in which a low-pressure refrigerant after being decompressed is evaporated; an ejector including a nozzle for decompressing and expanding the high-pressure refrigerant flowing out of the high-pressure heat exchanger, and a pressure increasing portion in which gas refrigerant evaporated in the low-pressure heat exchanger is drawn by a high-speed flow of refrigerant jetted from-the nozzle and a pressure of refrigerant to be sucked into the compressor is increased by converting expansion energy of the refrigerant to pressure energy thereof; a gas-liquid separator for separating the refrigerant flowing out of the ejector into gas refrigerant and liquid refrigerant, the gas-liquid separator including a gas refrigerant outlet connected to a refrigerant suction side of the compressor and a liquid refrigerant outlet connected to a refrigerant inlet side of the low-pressure heat exchanger; a decompression means for decompressing refrigerant supplied from the gas-liquid separator to the low-pressure heat exchanger; and a pressure-increasing amount control means for controlling a pressure increasing amount of refrigerant in the pressure increasing portion of the ejector.