EJECTOR

摘要

An ejector has a swirling space, a pressure reducing space, a suction passage, a pressure increasing space, a nozzle passage, a diffuser passage, a passage forming member that forms the nozzle passage and the diffuser passage, and a vibration suppressing portion that suppresses a vibration of the passage forming member. The vibration suppressing portion has (i) a first elastic member that applies a load to the passage forming member in a direction in which an area of a cross section perpendicular to the direction of the central axis of the nozzle passage and the diffuser passage decreases and (ii) a second elastic member that applies a load to the passage forming member in a direction opposite from the direction in which the first elastic member applies the load to the passage forming member.

主权项

1. An ejector for a vapor compression refrigeration cycle, the ejector comprising:
a body; a swirling space that is formed in the body to swirl a refrigerant flowing into the swirling space through a refrigerant inflow port from which the refrigerant flows in; a pressure reducing space that is formed in the body to reduce a pressure of the refrigerant flowing out of the swirling space; a suction passage that is formed in the body and communicates with a downstream side of the pressure reducing space in a flow direction of the refrigerant, the suction passage that draws the refrigerant from outside; a pressure increasing space that is formed in the body to mix an injection refrigerant injected from the pressure reducing space and a suction refrigerant drawn from the suction passage, the pressure increasing space that increases a pressure of a mixed refrigerant; a nozzle passage that has an annular shape, the nozzle portion at least a part of which is disposed inside the pressure reducing space and inside the pressure increasing space, the nozzle passage that reduces the pressure of a refrigerant flowing out of the swirling space and injects the refrigerant to a space provided with an inner peripheral surface of a portion of the body forming the pressure reducing space; a diffuser passage that is provided with an inner peripheral surface of a portion of the body forming the pressure increasing space and has an annular shape, the diffuser passage that mixes the injection refrigerant and the suction refrigerant and increases a pressure of the mixed refrigerant; a passage forming member that forms the nozzle passage and the diffuser passage; and a drive part that displaces the passage forming member in a direction of a central axis of the nozzle passage and the diffuser passage, wherein the passage forming member has a solid revolution shape having the central axis as an axis thereof and has an outer peripheral diameter increasing from the pressure reducing space toward the pressure increasing space, the drive part has:
a pressure responsive member that displaces the passage forming member depending on a temperature and the pressure of the suction refrigerant; anda vibration suppressing portion that suppresses a vibration of the passage forming member, and the vibration suppressing portion has:
a first elastic member that applies a load to the passage forming member in a direction in which an area of a cross section perpendicular to the direction of the central axis of the nozzle passage and the diffuser passage decreases; anda second elastic member that applies a load to the passage forming member in a direction opposite from the direction in which the first elastic member applies the load to the passage forming member.