公开(公告)号：US20200166269A1

公开(公告)日：2020-05-28

申请号：US16695805

申请日：2019-11-26

Applicant: LG ELECTRONICS INC.

Inventor： Changyoon JUNG ,  Yunsu CHO

IPC: F25D21/00 ,  F25D11/02

Abstract: The present disclosure provides a method of controlling a refrigerator that includes a compressor, an evaporator to supply cold air to a storage chamber, a defrosting heater to defrost the evaporator, and a controller to control the defrosting heater. The method includes: operating a cooling cycle for cooling the storage chamber; determining whether a defrosting start condition is satisfied during operation of the cooling cycle; determining whether a defrosting delay condition is satisfied when the defrosting start condition is satisfied; and starting a defrosting operation when the defrosting delay condition is not satisfied, and starting the defrosting operation at a delayed defrosting start time when the defrosting delay condition is satisfied.

公开(公告)号：US20230175757A1

公开(公告)日：2023-06-08

申请号：US17923730

申请日：2021-04-21

Applicant: LG ELECTRONICS INC.

Inventor： Youngseung SONG ,  Kyongbae PARK ,  Yunsu CHO ,  Kyunghun CHA ,  Sangbok CHOI

IPC: F25D21/00 ,  F25D21/08

CPC classification number: F25D21/002 ,  F25D21/08 ,  F25D2700/121 ,  F25D2700/02

Abstract: The present disclosure relates to a refrigerator. The refrigerator includes an evaporator, a defrost heater, a temperature sensor to detect an ambient temperature of the evaporator, and controller to control the defrost heater, wherein, in response to a defrosting operation start time point arriving, the controller is configured to perform a defrost operation mode including a pre-defrost cooling mode, a heater operation mode, and post-defrost cooling mode, perform a pulse operation mode in which the defrost heater is repeatedly turned on and off based on the heater operation mode, and change a magnitude of cooling power supplied in the post-defrost cooling mode based on an ON period of the defrost heater or a temperature of a cooling compartment in the pulse operation mode. Accordingly, defrosting efficiency and power consumption may be improved, and cooling power after defrosting may be efficiently supplied.

公开(公告)号：US20230194144A1

公开(公告)日：2023-06-22

申请号：US17923442

申请日：2021-04-21

Applicant: LG ELECTRONICS INC.

Inventor： Youngseung SONG ,  Yunsu CHO

IPC: F25D21/00 ,  F25D21/02 ,  F25D21/08

CPC classification number: F25D21/006 ,  F25D21/02 ,  F25D21/08

Abstract: The present disclosure relates to a refrigerator. The refrigerator according to one embodiment of the present disclosure comprises: an evaporator; a defrosting heater; a temperature sensor; and a controller to control the defrosting heater. The controller is configured to: in response to a defrosting operation starting time arriving, perform a defrosting operation mode including a pre-defrosting cooling mode, a heater operation mode and a post-defrosting cooling mode; perform a continuous operation mode, in which the defrosting heater is continuously on; and when a temperature change rate sequentially increases, decreases and increases again, perform a pulse operation mode, in which the defrosting heater is repeatedly turned on and off. Accordingly, defrosting efficiency may be improved, and power consumption may be reduced.

公开(公告)号：US20210071931A1

公开(公告)日：2021-03-11

申请号：US16965273

申请日：2018-12-21

Applicant: LG ELECTRONICS INC.

Inventor： Sungwook KIM ,  Kyongbae PARK ,  Sangbok CHOI ,  Yunsu CHO

IPC: F25D21/00 ,  F25D21/02

Abstract: There is disclosed a controlling method for a refrigerator comprising: a first defrosting step of performing defrosting for an evaporator, the first defrosting step which ends when the temperature of the evaporator reaches a first temperature; a pressure difference sensing step of measuring a difference between the pressure in a first through-hole arranged between an inlet hole for drawing air from a storage compartment and the evaporator and the pressure in a second through-hole arranged between an outlet hole for discharging air towards the storage compartment and the evaporator by using one differential pressure sensor; and a second defrosting step of performing additional defrosting for the evaporator when the measured pressure difference is a preset pressure or more.

公开(公告)号：US20230175758A1

公开(公告)日：2023-06-08

申请号：US17923710

申请日：2021-04-21

Applicant: LG ELECTRONICS INC.

Inventor： Youngseung SONG ,  Kyongbae PARK ,  Yunsu CHO ,  Namsoo CHO ,  Kyunghun CHA ,  Sangbok CHOI

IPC: F25D21/00 ,  F25D21/08

CPC classification number: F25D21/006 ,  F25D21/08

Abstract: The present disclosure relates to a refrigerator. According to an embodiment of the present disclosure, the refrigerator comprises: an evaporator; a defrost heater; a temperature sensor to sense a temperature around the evaporator; and a controller to control the defrost heater. In response to reaching a defrost operation starting point, the controller is configured to perform a defrost operation mode, perform a continuous operation mode, in which the defrost heater continuously turns on, and a pulsed operation mode, in which the defrost heater switches between on and off, based on the defrost operation mode, wherein in response to performing the pulsed operation mode, the controller is configured to change the ON duration or power level of the defrost heater. Accordingly, defrosting efficiency may be improved, and power consumption may be reduced.