| 摘要 |
The invention relates to a variable capacity type ejector capable of more precisely adjusting a flow rate of refrigerant in a range in which a displacement means can displace a needle and also capable of increasing a flow rate of refrigerant when the needle valve is fully opened. In the needle valve 24 which changes the degree of opening (throat portion area) of the nozzle 18 when the needle is displaced in the axial direction R of the throttle portion 18 b, the second tapered portion 24 b is formed on the throat portion 18 a side of the first tapered portion 24 a, and the taper angle theta 2 of the second tapered portion 24 b is formed larger than the taper angle theta 1 of the first tapered portion 24 a.
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