Denso Corporation

Yohei Nagano

Hiroshi Oshitani

Yoshiaki Takano

Haruyuki Nishijima

Yoshiyuki Yokoyama

Ryota Nakashima

Masahiro Ito

Hiroshi Maeda

Yoichiro Kawamoto

Hang Yuan

Daisuke Sakurai

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. At least one of the nozzle portion or the suction side decompressor is configured to adjust a refrigerant passage area such that a temperature difference between the outflow side evaporation temperature and the suction side evaporation temperature is at or below a predetermined reference temperature difference.

Ejector refrigeration cycle

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.

Ejector

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.

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Kariya, Japan

Yohei Nagano