Ejector

摘要

An ejector includes a body member having a depressurizing space that depressurizes a refrigerant which flows out of a swirling space that swirls the refrigerant, a suction passage that draws the refrigerant from an external, and a pressurizing space that mixes a refrigerant jetted from the depressurizing space with a refrigerant drawn from the suction passage and pressurizes the mixed refrigerant, and a conical passage formation member arranged in the depressurizing space and in the pressurizing space. A nozzle passage is formed of a refrigerant passage between an inner peripheral surface of the depressurizing space and an outer peripheral surface of the passage formation member, and a diffuser passage is formed of a refrigerant passage between an inner peripheral surface of a portion that defines the pressurizing space and an outer peripheral surface of the passage formation member.

主权项

1. An ejector used for a vapor compression refrigeration cycle, comprising:
a body member including a refrigerant inflow port through which a refrigerant is introduced, a swirling space in which the refrigerant introduced from the refrigerant inflow port swirls, a depressurizing space in which the refrigerant flowing out of the swirling space is depressurized, a suction passage communicating with a downstream side of the depressurizing space in a refrigerant flow and being a passage through which a refrigerant is drawn from an external, and a pressurizing space in which the refrigerant jetted from the depressurizing space and the refrigerant drawn through the suction passage are mixed and pressurized; a passage formation member having at least a portion arranged in the depressurizing space and a portion arranged in the pressurizing space; a nozzle passage provided in a space between an inner peripheral surface of a portion of the body member which defines the depressurizing space and an outer peripheral surface of the passage formation member, the nozzle passage functioning as a nozzle part that depressurizes and jets the refrigerant flowing out of the swirling space; and a diffuser passage provided in a space between an inner peripheral surface of a portion of the body member which defines the pressurizing space and an outer peripheral surface of the passage formation member, the diffuser passage functioning as a diffuser part that mixes the jetted refrigerant with the drawn refrigerant and pressurizes the mixed refrigerant, wherein the passage formation member has a shape that increases in cross-sectional area with distance from the depressurizing space.