Patent ID: 6604379
Filing Date: 2003-08-12
Classification: F04F,F25B

Abstract:
An ejector for an ejector cycle system including a compressor, a radiator, an evaporator and a gas-liquid separator, the ejector cycle system being constructed such that gas refrigerant separated in the gas-liquid separator is supplied to a suction side of the compressor and liquid refrigerant separated in the gas-liquid separator is supplied to the evaporator, the ejector comprising:a nozzle for decompressing high-pressure refrigerant flowing from the radiator by converting a pressure energy of the high-pressure refrigerant to a speed energy; and a mixing portion in which gas refrigerant evaporated in the evaporator is sucked by a flow of refrigerant jetted from the nozzle, to be mixed with the refrigerant jetted from the nozzle, wherein: the nozzle has a first refrigerant passage, a second refrigerant passage, and a third refrigerant passage in this order in a refrigerant flow direction from a refrigerant inlet toward a refrigerant outlet of the nozzle; the first refrigerant passage, the second refrigerant passage and the third refrigerant passage have cylindrical shapes, respectively, each having a constant passage diameter; and the passage diameter of the first refrigerant passage is larger than the passage diameter of the second refrigerant passage.