An ejector-type refrigeration cycle device is provided with a first ejector (15) which draws refrigerant from a refrigerant suction port (15b, 24b) by using a high-speed refrigerant flow jetted from a nozzle part (15a, 24a), and a first suction-side evaporator (19) connected to the refrigerant sucti
An ejector-type refrigeration cycle device is provided with a first ejector (15) which draws refrigerant from a refrigerant suction port (15b, 24b) by using a high-speed refrigerant flow jetted from a nozzle part (15a, 24a), and a first suction-side evaporator (19) connected to the refrigerant suction port (15b) of the first ejector (15), and a second suction-side evaporator (27) connected to a refrigerant suction port (24b) of a second ejector (24). A flow amount of the refrigerant in the second ejector (24) is smaller than a flow amount of the refrigerant in the first ejector (15). The refrigerant branched at a branch part (Z2) that is positioned on a downstream refrigerant side of a radiator (13) and on an upstream refrigerant side of the first ejector (15) flows into the second ejector (24), and the refrigerant branched on a downstream refrigerant side of the second ejector (24) flows into the second suction-side evaporator (27).
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1. An ejector-type refrigeration cycle device comprising: a compressor discharging a refrigerant;a radiator which cools the refrigerant discharged from the compressor;a first ejector and a second ejector, each of which draws the refrigerant from a refrigerant suction port by using a high-speed refri
1. An ejector-type refrigeration cycle device comprising: a compressor discharging a refrigerant;a radiator which cools the refrigerant discharged from the compressor;a first ejector and a second ejector, each of which draws the refrigerant from a refrigerant suction port by using a high-speed refrigerant flow jetted from a nozzle part;a first suction-side evaporator connected to the refrigerant suction port of the first ejector; anda second suction-side evaporator connected to the refrigerant suction port of the second ejector, whereina flow amount of the refrigerant in the second ejector is smaller than a flow amount of the refrigerant in the first ejector,the refrigerant branched at a branch part that is positioned on a downstream refrigerant side of the radiator and on an upstream refrigerant side of the first ejector flows into the second ejector, andthe refrigerant branched on a downstream refrigerant side of the second ejector flows into the second suction-side evaporator. 2. The ejector-type refrigeration cycle device of claim 1, wherein the second ejector has a double cylinder structure which has an inner cylinder and an outer cylinder,a suction flow drawn from the refrigerant suction port flows through a flow passage formed in an inside of the inner cylinder, anda drive flow jetted from the nozzle part flows through a flow passage formed in a space between the inner cylinder and the outer cylinder. 3. The ejector-type refrigeration cycle device of claim 1, wherein the second ejector is configured such that the nozzle part of the second ejector is formed at one end portion of a cylindrical member, and a mixing part and a diffuser part of the second ejector are formed at an other end portion of the cylindrical member, whereinthe mixing part mixes the high-speed refrigerant flow jetted from the nozzle part and a suction refrigerant drawn from the refrigerant suction port, the diffuser part reduces a speed of the refrigerant mixed in the mixing part and increases a pressure of the refrigerant mixed in the mixing part, and the nozzle part and the mixing part are connected smoothly. 4. The ejector-type refrigeration cycle device of any claim 1, further comprising: a throttle mechanism decompressing the refrigerant which flows into the second suction-side evaporator, whereinthe throttle mechanism has a structure swirling the refrigerant flowing therein. 5. An ejector-type refrigeration cycle device comprising: a compressor discharging a refrigerant;a radiator which cools the refrigerant discharged from the compressor;a first ejector and a second ejector, each of which draws the refrigerant from a refrigerant suction port by using a high-speed refrigerant flow jetted from a nozzle part;a first suction-side evaporator connected to the refrigerant suction port of the first ejector; anda second suction-side evaporator connected to the refrigerant suction port of the second ejector, whereina flow amount of the refrigerant in the second ejector is smaller than a flow amount of the refrigerant in the first ejector,the refrigerant branched at a branch part that is positioned on a downstream refrigerant side of the compressor and on an upstream refrigerant side of the radiator flows into the second ejector, andthe refrigerant branched on a downstream refrigerant side of the radiator and on an upstream refrigerant side of the first ejector flows into the second suction-side evaporator. 6. The ejector-type refrigeration cycle device of claim 5 wherein the second ejector has a double cylinder structure which has an inner cylinder and an outer cylinder,a suction flow drawn from the refrigerant suction port flows through a flow passage formed in an inside of the inner cylinder, anda drive flow jetted from the nozzle part flows through a flow passage formed in a space between the inner cylinder and the outer cylinder. 7. The ejector-type refrigeration cycle device of claim 5, wherein the second ejector is configured such that the nozzle part of the second ejector is formed at one end portion of a cylindrical member, and a mixing part and a diffuser part of the second ejector are formed at an other end portion of the cylindrical member, whereinthe mixing part mixes the high-speed refrigerant flow jetted from the nozzle part and a suction refrigerant drawn from the refrigerant suction port, the diffuser part reduces a speed of the refrigerant mixed in the mixing part and increases a pressure of the refrigerant mixed in the mixing part, and the nozzle part and the mixing part are connected smoothly. 8. The ejector-type refrigeration cycle device of claim 5, further comprising: a throttle mechanism decompressing the refrigerant which flows into the second suction-side evaporator, whereinthe throttle mechanism has a structure swirling the refrigerant flowing therein.
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