CPC F25D 29/005 (2013.01) [F25D 23/028 (2013.01); G01K 13/00 (2013.01); G05D 23/1902 (2013.01); F25D 2700/02 (2013.01); F25D 2700/12 (2013.01)] | 18 Claims |
1. An electronic device comprising:
a communicator; and
a processor configured to:
receive information regarding a refrigerator from the refrigerator via the communicator, divide an operation section of the refrigerator into an event section and a normal section based on the received information,
determine whether the refrigerator is abnormal based on a state of the refrigerator in the normal section or the event section among the received information,
determine a decreasing speed of an internal temperature of the refrigerator from a time point when a door of the refrigerator is opened and then closed until a time point when internal temperature of the refrigerator reaches a predetermined temperature in the event section based on the received information, and
determine whether the refrigerator is abnormal by comparing the speed with a predetermined speed threshold value,
wherein the event section comprises a section from a time point when the door of the refrigerator is opened until a time point when a temperature of the refrigerator reaches the predetermined temperature after the door is closed,
wherein the normal section comprises a section from a time point when the temperature of the refrigerator reaches the predetermined temperature until a time point before the door is opened, and
wherein the processor is further configured to:
measure a number of door opening and door opening times, and
determine whether the refrigerator is abnormal by comparing the internal temperature of the refrigerator with preset value (T_threshod) multiplied by a sum value, the sum value being an addition of the number of door openings to which a first weight is applied and the door opening time to which a second weight is applied.
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