公开(公告)号：US11549740B2

公开(公告)日：2023-01-10

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：US12228326B2

公开(公告)日：2025-02-18

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

Abstract: A refrigerator includes an evaporator, a defrost heater, a temperature sensor to detect a temperature associated with the evaporator, and controller to control the defrost heater. 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 a 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.

公开(公告)号：US11181311B2

公开(公告)日：2021-11-23

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：US20230160625A1

公开(公告)日：2023-05-25

申请号：US17923485

申请日：2021-04-21

Applicant: LG ELECTRONICS INC.

Inventor： Youngseung Song ,  Kyongbae Park ,  Yunsu Cho ,  Sangbok Choi ,  Namsoo Cho

IPC: F25D21/08

CPC classification number: F25D21/08 ,  F25D2700/10 ,  F25D2321/00

Abstract: The present disclosure relates to a refrigerator. The refrigerator according to an embodiment of the present disclosure comprises: an evaporator; a defrost heater; a temperature sensor to sense ambient temperature around the evaporator; and a controller to control the defrost heater, wherein the controller is configured to: perform a defrost operation mode in a case of reaching a defrosting operation start time point; perform, based on the defrost operation mode, a continuous operation mode in which the defrost heater is continuously turned on, and a pulse operation mode in which the defrost heater is repeatedly turned on and off; and perform the continuous operation mode again after performing the pulse operation mode. Accordingly, defrosting efficiency may be improved, and power consumption may be reduced.