Patent ID: 9625193
Date: 2017-04-18
CPC Classifications: B60H,F04F,F25B

Claim:
1. An ejector for a vapor compression refrigeration cycle device having an evaporator that evaporates a refrigerant, the ejector comprising: a body including a refrigerant inlet port, a swirling space in which a refrigerant flowing from the refrigerant inlet port is swirled, a depressurizing space in which the refrigerant flowing out of the swirling space is depressurized, a suction passage that communicates with a downstream side of the depressurizing space in a refrigerant flow and draws the refrigerant from an external, and a pressurizing space in which an ejection refrigerant jetted from the depressurizing space is mixed with a suction refrigerant drawn from the suction passage; and a passage formation member which is at least partially arranged inside the depressurizing space and inside the pressurizing space and has a conical shape having a cross-sectional area that increases with distance from the depressurizing space, wherein a refrigerant passage provided between an inner peripheral surface of a portion of the body, which defines the depressurizing space, and an outer peripheral surface of the passage formation member is a nozzle passage functioning as a nozzle that depressurizes and jets the refrigerant flowing out of the swirling space, a refrigerant passage provided between an inner peripheral surface of a portion of the body, which defines the pressurizing space, and an outer peripheral surface of the passage formation member is a diffuser passage functioning as a diffuser that mixes the ejection refrigerant and the suction refrigerant together and pressurizes the mixed refrigerant, the diffuser passage has an annular shape in a cross-section surface perpendicular to an axial direction of the passage formation member, and the body further includes a gas-liquid separation space that separates the refrigerant flowing out of the pressurizing space into gas and liquid by the action of a centrifugal force, and a plurality of liquid-phase refrigerant outflow passages through which the liquid-phase refrigerant separated by the gas-liquid separation space flows out to the evaporator.