Patent ID: 11867448
Assignee: LG ELECTRONICS INC.
Field: Other consumer goods (Other fields)
Classification: CPC F | IPC F

Claim 0:
1. A control method by a refrigerator comprising:
operating a heat generating element of a sensor reacting to a change in a flow rate of air for a predetermined period of time;
detecting a temperature of the heat generating element, a first detection temperature that is sensed by a sensor in response to the heat generating element turned on and a second detection temperature that is sensed by the sensor in response to the heat generating element turned off, wherein the second detection temperature is sensed in response to the turning off after the heat generating element maintained the turning on for sensing the first detection temperature;
performing a defrosting operation of an evaporator when a temperature difference value between the first detection temperature and the second detection temperature is less than a first reference difference value;
updating the temperature difference value between the first detection temperature and the second detection temperature after the defrosting operation is completed;
detecting residual frost on the evaporator based on the temperature difference between the first detection temperature and the second detection temperature among detection temperatures of the heat generating element.