Container refrigeration apparatus with impact event assessment and abnormality diagnosis

A container refrigeration apparatus comprising:

• a refrigeration cycle unit having
• a refrigerant circuit in which at least a radiator and an evaporator are connected,
• an external fan provided in the vicinity of the radiator, and
• an internal fan provided in the vicinity of the evaporator;
• and
• a controller configured to:
• control an action of the refrigeration cycle unit to adjust a temperature of inside air in a container to a desired temperature,
• determine whether or not a strong impact acted on the container, and
• perform an abnormality diagnosis to diagnose whether or not at least one of the container or the container refrigeration apparatus has an abnormality when the controller determines that the strong impact acted on the container, and
• the container refrigeration apparatus further comprising:
• a detecting sensor configured to detect a physical quantity for determining whether or not the strong impact acted on the container by the controller, and transmit the physical quantity to the controller;
• a first electric power supplier connected to components of the refrigeration cycle unit and configured to supply electric power to the components;
• and
• a secondary electric power supplier separate from the first electric power supplier and configured to supply electric power to the controller and the detecting sensor, wherein
• the first electric power supplier is connected to at least the external fan and the internal fan, and
• the secondary electric power supplier is configured to enable the detecting sensor to detect and transmit the physical quantity to the controller for determining whether or not the strong impact acted on the container, during a time in which the first electric power supplier is in a power-OFF state.