US 11,940,200 B2
Refrigerator and control method of refrigerator
Sungwook Kim, Seoul (KR); Sangbok Choi, Seoul (KR); Wookyung Baik, Seoul (KR); and Kyongbae Park, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Nov. 18, 2021, as Appl. No. 17/529,935.
Application 17/529,935 is a continuation of application No. 16/348,711, granted, now 11,231,219, previously published as PCT/KR2017/012739, filed on Nov. 10, 2017.
Claims priority of application No. 10-2016-0149421 (KR), filed on Nov. 10, 2016.
Prior Publication US 2022/0074640 A1, Mar. 10, 2022
Int. Cl. F25D 21/00 (2006.01); F25D 17/06 (2006.01); F25D 21/02 (2006.01); F25D 21/08 (2006.01); F25D 29/00 (2006.01)
CPC F25D 21/008 (2013.01) [F25D 17/06 (2013.01); F25D 17/062 (2013.01); F25D 17/067 (2013.01); F25D 21/00 (2013.01); F25D 21/002 (2013.01); F25D 21/02 (2013.01); F25D 21/025 (2013.01); F25D 21/08 (2013.01); F25D 29/00 (2013.01); F25D 2700/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for controlling a refrigerator, the method comprising:
performing a first defrosting operation of an evaporator while operating a heater, the evaporator being provided in a case and configured to supply cold air while heat-exchanging with air;
determining, based on a temperature of the evaporator reaching a first temperature, that the first defrosting operation is completed, and turning off the heater;
detecting a pressure differential using a single differential pressure sensor, wherein the pressure differential is a difference between pressures between an inlet for receiving air from a storage compartment and an outlet for discharging air into the storage compartment; and
performing a second defrosting operation as an additional defrosting operation of the evaporator based on the detected pressure differential being greater than a predefined pressure,
wherein the second defrosting operation comprises operating the heater until the temperature of the evaporator reaches a second temperature that is greater than or equal to the first temperature.