EJECTOR DEVICE AND VAPOR COMPRESSION REFRIGERATION CYCLE USING EJECTOR DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an ejector device having a nozzle capable of stably improving the nozzle efficiency when depressurizing fluid in a gas-liquid two-phase condition and to provide a vapor compression refrigeration cycle using the ejector device.;SOLUTION: In a passage expanding portion 145 of the nozzle 140 of the ejector, an expanding angle θ2 of a passage wall surface of an outlet portion 148 from a middle portion 147 in a refrigerant flow direction to a jet port 142 is larger than an expanding angle θ1 of a passage wall surface of the middle portion 147 and at the outlet portion 148, the expanding angle θ2 gradually increases toward a downstream side.;COPYRIGHT: (C)2010,JPO&INPIT