EJECTOR

摘要

An ejector is provided with a conical passage formation member (35) disposed inside a body (30). In a gap between the body and the passage formation member, a nozzle passage (13a) that decompresses and ejects a high-pressure refrigerant is formed. A diffuser passage (13c) mixes and boosts the ejected refrigerant and a suctioned refrigerant. A swirl promotion passage (13d) promotes a swirl flow of the refrigerant that flows out of the diffuser passage by a rectifier plate (40) and causes the refrigerant to flow to the side of a vapor-liquid separation space (30f). A swirl outlet height (h2), which is a size in an axial direction on the most downstream portion of the refrigerant flow in the swirl promotion passage, is larger than a diffuser outlet height (h1), which is a size in the axial direction on the most downstream portion of the refrigerant flow in the diffuser passage.