Abnormality determination device for transporting freezing device, transporting freezing device including this abnormality determination device, and abnormality determination method for transporting freezing device

An abnormality determination device for a transporting refrigeration apparatus, the abnormality determination device comprising:

• a determination unit that determines an abnormality of the transporting refrigeration apparatus installed on a container, wherein
• the transporting refrigeration apparatus includes a refrigerant circuit that connects a compressor, a condenser, a decompression device, and an evaporator,
• in pre-trip inspection that is conducted before the container is loaded on a transporting device, a test operation is performed for at least one of a plurality of test operating modes,
• the pre-trip inspection is conducted multiple times such that the at least one of the plurality of test operating modes is performed multiple times,
• the abnormality determination device is configured to obtain at least part of time series test data related to the at least one of the plurality of test operating modes performed in the pre-trip inspection,
• the determination unit is configured to determine whether the transporting refrigeration apparatus has an abnormality based on a change trend of the time series test data related to the at least one test operating mode performed multiple times after the pre-trip inspection has been conducted multiple times,
• the determination unit is configured to determine whether the transporting refrigeration apparatus has an abnormality based on the time series test data obtained in a predetermined first period and the time series test data obtained in a second period that differs from the first period,
• the abnormality determination device for the transporting refrigeration apparatus further comprising:
• a calculator that calculates a deviation degree of the transporting refrigeration apparatus from a normal state based on the time series test data obtained in the pre-trip inspection, wherein
• the calculator is configured to calculate a first index value from the time series test data that are obtained in the first period and a second index value from the time series test data that are obtained in the second period,
• the calculator is configured to calculate a deviation state of the transporting refrigeration apparatus from the normal state based on the first index value and the second index value,
• the determination unit is configured to determine whether the transporting refrigeration apparatus has an abnormality based on the deviation degree of the transporting refrigeration apparatus from the normal state, and
• when there is no abnormality, the determination unit is configured to estimate an abnormality occurrence time.