Patent ID: 7841193

Claim:
A refrigerant flow-amount controlling device for an ejector refrigerant cycle system having a compressor for compressing refrigerant and a radiator for cooling high-temperature high-pressure refrigerant discharged from the compressor, the refrigerant from the radiator being divided at a branch portion into a first stream and a second stream, the refrigerant flow-amount control device comprising: an ejector having a nozzle portion for decompressing refrigerant of the first stream, and a refrigerant suction port from which refrigerant is drawn by a high-speed flow of refrigerant jetted from the nozzle portion; a first evaporator for evaporating refrigerant flowing out of the ejector; a throttle means for decompressing and expanding refrigerant of the second stream; a second evaporator, disposed downstream of the throttle means and upstream of the refrigerant suction portion, for evaporating refrigerant; and an adjusting mechanism having a temperature-sensitive deformation member that is deformed in accordance with a variation in a refrigerant temperature of the cycle system to adjust one refrigerant passage area of the nozzle portion and the throttle means, wherein the adjusting mechanism is provided to adjust a flow ratio of a first refrigerant flow amount decompressed by the nozzle portion of the ejector and a second refrigerant flow amount drawn into the refrigerant suction port of the ejector.