LEAKAGE DIAGNOSING DEVICE, LEAKAGE DIAGNOSING METHOD, AND REFRIGERATING DEVICE

摘要

A leakage diagnosing device for diagnosing whether or not there is a leakage of a refrigerant from a refrigerant circuit for performing a refrigerating cycle, wherein the leakage diagnosing device is adapted to perform a refrigerant leakage diagnosis by using the amount of loss of exergy of the refrigerant in devices constituting the refrigerant circuit. In a leakage diagnosing device (50), an exergy calculating section (52) calculates, on the basis of the amount of loss of exergy of a refrigerant in circuit constituting devices, a leakage index value varying according to the amount of the refrigerant leaked from a refrigerant circuit (20).  Then, a leakage determining section (53) determines whether or not there is a leakage from the refrigerant circuit (20) on the basis of the leakage index value calculated by the exergy calculating section (52).