Abstract: An ejector refrigeration cycle includes a compressor, a radiator, a branch portion, an ejector, a suction side decompressor, a windward evaporator, and a leeward evaporator. The ejector includes a nozzle portion and a pressure increasing portion. The windward evaporator and the leeward evaporator include at least one outflow side evaporation portion. The leeward evaporator includes a suction side evaporation portion. An outflow side evaporation temperature is a refrigerant evaporation temperature in the at least one outflow side evaporation portion of the leeward evaporator. A suction side evaporation temperature is a refrigerant evaporation temperature in the suction side evaporation portion of the leeward evaporator.

Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section which functions as a nozzle and a diffuser passage having an annular cross section which functions as a pressure increase portion, the nozzle passage and the diffuser passage being disposed between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member in a direction along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. Center axes of the passage formation member, the upstream actuating bar and the inflow space are coaxial with each other.

Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section functioning as a nozzle and a diffuser passage having an annular cross section functioning as a pressurizing portion between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. A largest outer diameter portion of an annular member forming a wall surface of the nozzle passage provides a throat portion functioning as an edge for enlarging a passage cross-sectional area to cause a separation vortex in the refrigerant.

Abstract: An ejector refrigeration cycle includes a compressor, a radiator, a branch portion, an ejector, a suction side decompressor, a windward evaporator, and a leeward evaporator. The ejector includes a nozzle portion and a pressure increasing portion. The windward evaporator and the leeward evaporator include at least one outflow side evaporation portion. The leeward evaporator includes a suction side evaporation portion. An outflow side evaporation temperature is a refrigerant evaporation temperature in the at least one outflow side evaporation portion of the leeward evaporator. A suction side evaporation temperature is a refrigerant evaporation temperature in the suction side evaporation portion of the leeward evaporator.

Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section functioning as a nozzle and a diffuser passage having an annular cross section functioning as a pressurizing portion between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. A largest outer diameter portion of an annular member forming a wall surface of the nozzle passage provides a throat portion functioning as an edge for enlarging a passage cross-sectional area to cause a separation vortex in the refrigerant.

Abstract: An ejector includes a body including an inflow space into which a refrigerant flows, a passage formation member disposed inside the body and having a conical shape, and a nozzle passage having an annular cross section which functions as a nozzle and a diffuser passage having an annular cross section which functions as a pressure increase portion, the nozzle passage and the diffuser passage being disposed between an inner wall surface of the body and a conical lateral surface of the passage formation member. A drive mechanism that displaces the passage formation member in a direction along a center axis is coupled to an upstream actuating bar which extends from the passage formation member toward the inflow space and is slidably supported by the body. Center axes of the passage formation member, the upstream actuating bar and the inflow space are coaxial with each other.

Abstract: A refrigeration cycle device includes a first branch portion with branched first and second refrigerant passages, an ejector located in the first refrigerant passage, a first evaporator located in the first refrigerant passage to evaporate refrigerant flowing out of the ejector, a branch passage through which refrigerant upstream of a nozzle portion of the ejector flows into a refrigerant suction port of the ejector, a first throttle provided in the branch passage, a second evaporator located in the branch passage to evaporate the refrigerant flowing out of the first throttle, a second throttle provided in the second refrigerant passage, and a third evaporator located in the second refrigerant passage to evaporate the refrigerant flowing out of the second throttle. Furthermore, a pressure-loss generation portion is located to generate a pressure loss in the first refrigerant passage, thereby causing the refrigerant to easily flow into the second refrigerant passage.