Patent ID: 7784294

Claim:
A refrigerator unit for a container, comprising: a ventilation unit configured to ventilate air from an interior of a container, the ventilation unit having a ventilation passage through which the ventilated air passes and an opening/closing member configured to open and close the ventilation passage; an acquisition unit configured to acquire ventilation data related to a quantity of air ventilated by the ventilation unit and configured to acquire opening degree data indicating the degree to which the opening/closing member has opened the ventilation passage as at least part of the ventilation data, the acquisition unit having an opening degree detecting device configured to detect the opening degree based on a movement amount of the opening/closing member, and a transmitting device configured to transmit the movement amount of the opening/closing member to the opening degree detecting device; a recording unit configured to record the ventilation data acquired by the acquisition unit; a temperature detecting device configured to detect an ambient temperature surrounding the transmitting device; and a correction unit configured to correct the movement amount of the opening/closing member transmitted by the transmitting device based on the ambient temperature.