Patent ID: 7987685

Claim:
A refrigerant cycle device, comprising: a compressor for compressing and discharging refrigerant; a branch portion for branching a flow of the refrigerant discharged from the compressor; a first radiator for radiating heat from a first high-temperature and high-pressure refrigerant branched at the branch portion; an ejector including a nozzle portion for decompressing and expanding the refrigerant on a downstream side of the first radiator, a refrigerant suction port for sucking refrigerant by a high-velocity refrigerant flow ejected from the nozzle portion, and a diffuser portion for mixing the high-velocity refrigerant flow jetted from the nozzle portion and the refrigerant sucked from the refrigerant suction port and for increasing a pressure of the mixed refrigerant; a second radiator for radiating heat from a second high-temperature and high-pressure refrigerant branched at the branch portion; a throttle device for decompressing and expanding the refrigerant on a downstream side of the second radiator; first refrigerant piping through which the refrigerant flowing out of the first radiator flows into the nozzle portion; second refrigerant piping through which the refrigerant flowing out of the second radiator flows into the throttle device, the second refrigerant piping being provided independently from the first refrigerant piping and beginning at an outlet of the second radiator; and a suction side evaporator for evaporating the refrigerant on a downstream side of the throttle device and for allowing the refrigerant to flow to an upstream side of the refrigerant suction port; wherein the first radiator and the second radiator are disposed on a downstream side of the branch portion such that an amount of heat radiated from the refrigerant in the first radiator is smaller than that in the second radiator; and the first radiator is configured to cool the refrigerant flowing therein such that the refrigerant at a refrigerant outlet of the first radiator is in a gas-liquid two-phase state and the refrigerant in the gas-liquid two-phase state flows into the nozzle portion.