| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a container refrigeration device for refrigerating the interior of a container that increases the precision with which locking faults and disconnection faults of a motor are determined, and eliminates the erroneous detection of motor faults. <P>SOLUTION: The container refrigeration device includes a fault determination part (44), which compares the value of the current flowing in an interior motor (1) with a preset threshold current value to determine motor faults in the interior motor (1), and a threshold value changing part (45), which changes the threshold current value of the fault determination part (44) in accordance with the power supply voltage for each power supply frequency of a power supply (42) that supplies power to the interior motor (1). <P>COPYRIGHT: (C)2013,JPO&INPIT |
