Patent ID: 7392158

Claim:
A refrigerator comprising: a refrigerant circuit provided with a compressor including a motor and a refrigerant detecting means for detecting a refrigerant state; a detecting component configured and arranged to detect at least one of a current of said motor and a voltage of said motor; and a prediction component configured and arranged to predict an internal condition of the compressor based on detection values obtained by said detecting component, said prediction component having an identification component for identifying a parameter of a motor model from the detection values obtained by the detecting component, and a derivation component for deriving the internal condition of the compressor based on the parameter identified by the identification component, the parameter identified by said identification component being motor driving torque, and said derivation component being configured to derive the high refrigerant pressure or low refrigerant pressure of the refrigerant circuit based on the motor driving torque identified by the identification component and the refrigerant state detected by the refrigerant detecting component.