Patent ID: 7726150
Filing Date: 2010-06-01
Classification: B60H,F25B,F28D

Abstract:
1. An ejector cycle device comprising: a compressor for drawing and compressing refrigerant; a refrigerant radiator for radiating heat of high-pressure refrigerant discharged from the compressor; an ejector having a nozzle part for decompressing refrigerant from the refrigerant radiator, and a refrigerant suction port for drawing refrigerant by a high-velocity flow of refrigerant jetted from the nozzle part; a branch passage for introducing refrigerant branched from a branch portion located on an upstream side of the nozzle part of the ejector in a refrigerant flow direction into the refrigerant suction port; a first evaporator arranged on a downstream side of the ejector in the refrigerant flow direction for evaporating the refrigerant; and a second evaporator arranged in the branch passage for evaporating the refrigerant, a flow rate of refrigerant discharged from the compressor is divided into a first flow rate of refrigerant flowing in the second evaporator and a second flow rate of refrigerant flowing into the nozzle part of the ejector; wherein a refrigerant flow rate ratio (α) of the first flow rate of refrigerant flowing in the second evaporator to the flow rate of refrigerant discharged from the compressor is set within a range from 0.07 or more to 0.93 or less; a refrigerant flow rate ratio (Δ) of the second flow rate of refrigerant flowing into the nozzle part of the ejector to the flow rate of refrigerant discharged from the compressor is in a range of 1.0—the refrigerant flow rate ratio (α); and the only refrigerant flowing to the refrigerant suction port of the ejector is refrigerant branched at the branch portion and flowing through the branch passage.