Patent ID: 7520142

Claim:
An ejector type refrigerating cycle comprising: a compressor sucking refrigerant and compressing the same; a heat radiating device radiating heat from high-pressure refrigerant pumped out from the compressor; an ejector having a nozzle portion depressurizing and expanding the refrigerant from the heat radiating device, a suction port sucking the refrigerant by high speed refrigerant flow ejected from the nozzle portion, and a pressure increasing portion mixing the high speed refrigerant ejected from the ejector nozzle with the refrigerant sucked from the suction port and increasing fluid pressure of the refrigerant while converting the speed energy of the refrigerant to pressure energy; a first vaporizing device evaporating the refrigerant from the ejector to perform a cooling operation; a first bypass passage bifurcated at a bifurcating point which is located at an inlet side of the ejector supplying a part of the refrigerant from the heat radiating device to the suction port of the ejector so that the refrigerant from the heat radiating device is divided at the bifurcating point into two refrigerant flows which are simultaneously and respectively supplied to the nozzle portion of the ejector and to the first bypass passage; a first restricting device provided in the first bypass passage depressurizing the part of the refrigerant from the heat radiating device; a second vaporizing device provided in the first bypass passage at an outlet side of the first restricting device so that the first restricting device is provided between the bifurcating point and an inlet side of the second vaporizing device evaporating the refrigerant to perform a cooling operation; and an internal heat exchanger carrying out heat exchange between low-pressure refrigerant on an inlet side of the compressor and high-pressure refrigerant on an outlet side of the compressor; wherein the refrigerant from the compressor is supplied via the heat radiating device to a high-pressure side refrigerant passage of the internal heat exchanger, and the refrigerant from the first vaporizing device is exclusively supplied to a low-pressure side refrigerant passage of the internal heat exchanger.