Patent ID: 6918266

Claim:
An ejector comprising: a nozzle in which a driving fluid flow is throttled and is accelerated by converting pressure energy to speed energy; a housing which receives the nozzle to define a passage portion around the nozzle, the housing having a suction port from which a fluid is sucked by entrainment of a high-speed flow of driving fluid jetted from the nozzle, and a pressure increasing portion in which the fluid sucked from the suction port and the driving fluid jetted from the nozzle are mixed while a pressure of the fluid is increased by converting the speed energy to the pressure energy; and a wall portion, which is provided in the housing, to prevent the fluid drawn from the suction port into the passage portion from flowing toward an inlet side of the nozzle from a position of the suction port in an axial direction of the nozzle, wherein the housing has an inner wall surface for defining the suction port, and a part of the inner wall surface is positioned in the same surface as an end portion of the wall portion.