Patent ID: 9581376
Date: 2017-02-28
CPC Classifications: B05B,F04F,F25D

Claim:
1. An ejector comprising: a swirling space formation member that defines a swirling space in which a fluid swirls; a nozzle including a fluid passage in which the fluid flowing out of the swirling space is depressurized, and a fluid ejection port from which the fluid depressurized in the fluid passage is ejected; and a body including a fluid suction port through which a fluid is drawn due to a suction action of the fluid ejected at high speed from the fluid ejection port, and a pressure increase part that converts a velocity energy of a mixed fluid of the ejected fluid and the fluid drawn from the fluid suction port into a pressure energy, wherein the fluid passage of the nozzle includes a minimum passage area part smallest in passage-cross-sectional area, and a divergent part that gradually enlarges in passage-cross-sectional area from the minimum passage area part toward the fluid ejection port, the ejector further comprising a swirling suppression part which is disposed in the fluid passage of the nozzle and reduces a velocity component of the fluid in a swirling direction of the fluid flowing into the minimum passage area part from the swirling space, the swirling suppression part includes at least one groove portion provided on an inner peripheral surface of the fluid passage of the nozzle, and at least a part of the groove portion is disposed on an upstream side of the minimum passage area part.