| 摘要 |
PROBLEM TO BE SOLVED: To suppress the lowering of the nozzle efficiency of an ejector which pressure-reduces fluid in an air-liquid mixed state by a nozzle.SOLUTION: A swiveling space 31c for swiveling a refrigerant and a refrigerant passage for pressure-reducing the refrigerant flowing out of the swiveling space 31c are formed in a nozzle 31 of an ejector 13. A minimum passage area part 31d which is maximally reduced in a refrigerant passage area and a divergent part 31f which gradually expands the refrigerant passage area toward a refrigerant injection port 31b from the minimum passage area part 31d are arranged as the refrigerant passage, and furthermore, a plate-shaped member 33 for lowering a speed component in the swiveling direction of a refrigerant which flows into the minimum passage area part 31d is arranged in the refrigerant passage. By this constitution, a state of the refrigerant flowing into the minimum passage area part 31d is made to approximate an air-liquid mixed state that an air-phase refrigerant and a liquid-phase refrigerant are uniformly mixed, and the nozzle efficiency of the ejector 13 is improved. |
