초록 ▼

In an ejector cycle system using carbon dioxide as refrigerant, an ejector decompresses and expands refrigerant from a radiator to suck gas refrigerant evaporated in an evaporator, and converts an expansion energy to a pressure energy to increase a refrigerant pressure to be sucked into a compressor

In an ejector cycle system using carbon dioxide as refrigerant, an ejector decompresses and expands refrigerant from a radiator to suck gas refrigerant evaporated in an evaporator, and converts an expansion energy to a pressure energy to increase a refrigerant pressure to be sucked into a compressor. Because refrigerant is decompressed and expanded in a super-critical area, a pressure difference during the decompression operation becomes larger, and a specific enthalpy difference becomes larger. Accordingly, energy converting efficiency in the ejector becomes higher, and efficiency of the ejector cycle system is improved.

대표청구항 ▼

1. An ejector cycle system comprising:a compressor for compressing refrigerant to a super-critical pressure higher than the critical pressure of the refrigerant; a radiator for cooling refrigerant discharged from the compressor at the super-critical pressure; an evaporator in which refrigerant is ev

1. An ejector cycle system comprising:a compressor for compressing refrigerant to a super-critical pressure higher than the critical pressure of the refrigerant; a radiator for cooling refrigerant discharged from the compressor at the super-critical pressure; an evaporator in which refrigerant is evaporated by absorbing heat; an ejector which decompresses and expands refrigerant from the radiator to suck gas refrigerant evaporated in the evaporator, and converts an expansion energy to a pressure energy to increase a refrigerant pressure to be sucked into the compressor; and a gas-liquid separator for storing refrigerant and for separating refrigerant from the ejector into gas refrigerant and liquid refrigerant, the gas-liquid separator being disposed to supply gas refrigerant to a suction side of the compressor and to supply liquid refrigerant to the evaporator; wherein a refrigerant pressure before being decompressed in the ejector is higher than the critical pressure of the refrigerant, and a refrigerant after being decompressed in the ejector is lower than the critical pressure of the refrigerant.