Patent ID: 8205464

Claim:
A refrigeration device comprising: a compression mechanism configured to compress a refrigerant; a radiator connected to a refrigerant discharge side of said compression mechanism; a first expansion mechanism connected to an exit side of said radiator; a liquid receiver connected to a refrigerant outflow side of said first expansion mechanism; a second expansion mechanism connected to an exit side of said liquid receiver; an evaporator connected to a refrigerant outflow side of said second expansion mechanism and to a refrigerant intake side of said compression mechanism; a pressure detector arranged to detect a refrigerant pressure between the refrigerant discharge side of said compression mechanism and a refrigerant inflow side of said first expansion mechanism; a temperature detector arranged to detect a refrigerant temperature between the exit side of said radiator and the refrigerant inflow side of said first expansion mechanism; and a control unit configured to control said first expansion mechanism using the refrigerant pressure detected by said pressure detector and the refrigerant temperature detected by said temperature detector so that refrigerant flowing out from said first expansion mechanism reaches a saturated state, said control unit being configured to calculate saturation pressure from the refrigerant pressure detected by said pressure detector and the refrigerant temperature detected by said temperature detector, and the control unit being further configured to control said first expansion mechanism so that a pressure of refrigerant flowing out from said first expansion mechanism reaches said saturation pressure.