Patent ID: 7797955

Claim:
A supercritical cycle comprising an evaporator, a compressor, a radiator and an expansion valve, the supercritical cycle further comprising: an internal heat exchanger exchanging heat between high-pressure side refrigerant flowing toward a main valve portion of the expansion valve from the radiator and low-pressure side refrigerant flowing toward the compressor from the evaporator; a fluid path supplying the refrigerant directly from the outlet of the high-pressure side of the internal heat exchanger to the main valve portion of the expansion valve; wherein the fluid path is connected to a refrigerant path downstream of the main valve portion via the main valve portion; a bypass extending from the high-pressure upstream side or an intermediate part of the internal heat exchanger; a temperature sensing portion controlling the main valve portion; a temperature sensing path supplying the refrigerant from the bypass to the temperature sensing portion; and a refrigerant return path supplying the refrigerant from the temperature sensing portion to the refrigerant path downstream of the main valve portion, wherein the refrigerant return path is a bypass of the main valve portion and connected to the refrigerant path downstream of the main valve portion.