SUPERCRITICAL REFRIGERATING CYCLE

PROBLEM TO BE SOLVED: To properly carry out cooling fan control of a high pressure side radiator in a supercritical refrigerating cycle. SOLUTION: The supercritical refrigerating cycle is provided with the radiator 2 cooling a discharged refrigerant of a compressor 1, a cooling fan 2a sending outside air to the radiator 2, a pressure reducing means 4 for reducing a pressure of an outlet side refrigerant of the radiator 2, and controlling an opening such that a high pressure becomes a target pressure, and an evaporator 5 evaporating a low pressure refrigerant reduced in pressure by the pressure reducing means 4. The high pressure becomes a critical pressure or more of the refrigerant. An information value is calculated indicating a difference between an actual heat dissipation state of the outlet side refrigerant of the radiator 2, and an ideal heat dissipation state determined by an outside air temperature, and an air amount of the cooling fan is controlled on the basis of the information value such that the difference is reduced. COPYRIGHT: (C)2007,JPO&INPIT