公开(公告)号：US11236460B2

公开(公告)日：2022-02-01

申请号：US16094613

申请日：2017-04-18

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon Je ,  Chungill Lee ,  Kiwook Lee

IPC: D06F39/08 ,  D06F33/42 ,  H02P21/18 ,  H02P21/22 ,  H02P21/14 ,  H02P27/12 ,  D06F103/48 ,  D06F37/12 ,  D06F105/46

Abstract: Disclosed is a drain pump driving apparatus and a laundry treatment machine including the same. The laundry treatment machine includes: a drain pump driving apparatus configured to drive a drain pump, wherein the drain pump driving apparatus includes: a motor to drive the drain pump; an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation, and output the converted AC power to the motor; an output current detector to detect an output current flowing to the motor; and a controller configured to control the inverter, wherein the controller is further configured to calculate a speed of the motor based on an output current, and calculate a lift, which is a difference between a water level of a water introduction part through which water flows into the drain pump and s water level of a water discharge part for discharging water from the drain pump, based on the calculated speed.

公开(公告)号：US10088435B2

公开(公告)日：2018-10-02

申请号：US15470108

申请日：2017-03-27

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook Lee ,  Chanmyung Park ,  Namsoo Lee ,  Jinhee Jeong

IPC: G01N21/00 ,  G01N21/954 ,  F25B31/02 ,  F25B39/00 ,  F25B49/02 ,  G01M15/14 ,  F25B39/02 ,  F25B39/04 ,  F25B45/00

Abstract: Disclosed is a detection device for detecting a turbomachine including an opening, the detection device comprises: a flange configured to close the opening; and an endoscope assembly including an endoscope body, a detector extending from the endoscope assembly and inserted into an internal space of the turbomachine through the flange and an extension part connecting the endoscope body and the detector.

公开(公告)号：US11920959B2

公开(公告)日：2024-03-05

申请号：US17213535

申请日：2021-03-26

Applicant: LG ELECTRONICS INC.

Inventor： Seongki Baek ,  Kiwook Lee ,  Sena Jeong

IPC: G01D5/20 ,  H01F27/02 ,  H01F27/28

CPC classification number: G01D5/2086 ,  H01F27/02 ,  H01F27/288

Abstract: The present disclosure relates to a displacement sensor. A displacement sensor according to the embodiment of the present disclosure includes a coil structure consisting of wound coil, a shield member formed to surround an outer periphery of the coil structure and a housing, wherein the housing comprises an upper side wall part surrounding an outer periphery of the shield member and a lower side wall part formed to extend from the upper side wall part, wherein an inner circumferential surface of the lower side wall part is protruded toward the inside of the housing more than an inner circumferential surface of the upper side wall part, wherein an outer circumferential surface of the lower side wall part may include a depressed region formed to be depressed into the inside of the housing by a predetermined depth.

公开(公告)号：US11674721B2

公开(公告)日：2023-06-13

申请号：US17253213

申请日：2019-07-10

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook Lee ,  Namsoo Lee ,  Chanmyung Park

IPC: F25B31/00 ,  F28F3/12

CPC classification number: F25B31/006 ,  F28F3/12

Abstract: A refrigerator according to an embodiment of the present invention includes: a compressor configured to compress a refrigerant; and an inverter module configured to control the compressor, wherein the inverter module includes: a heatsink provided with a cooling passage through which coolant passes; a coolant inlet connected to the heatsink to communicate with an inlet of the cooling passage; a coolant outlet connected to the heatsink to communicate with an outlet of the cooling passage; at least one insulated gate bipolar transistor (IGBT) disposed on a top surface of the heatsink; and at least one diode disposed to be spaced apart from the IGBT on the top surface of the heatsink, wherein the cooling passage includes: an IGBT cooling passage that is closer to the coolant inlet among the coolant inlet and the coolant outlet; and a diode cooling passage that is closer to the coolant outlet among the coolant inlet and the coolant outlet, wherein the diode cooling passage is disposed behind the IGBT cooling passage in a flow direction of the coolant.

公开(公告)号：US11566361B2

公开(公告)日：2023-01-31

申请号：US16900030

申请日：2020-06-12

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon Je ,  Chungill Lee ,  Kiwook Lee

IPC: D06F33/48 ,  D06F39/08 ,  H02P21/05 ,  D06F37/40 ,  H02P23/04 ,  D06F103/04 ,  D06F103/18 ,  D06F103/26 ,  D06F103/48 ,  D06F105/48 ,  D06F105/58 ,  D06F33/42

Abstract: Disclosed herein is a drain pump driving apparatus and a laundry treatment machine including the same. The drain pump driving apparatus and the laundry treatment machine including the same according to an embodiment of the present invention include a motor to operate the drain pump, an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation and output the converted AC power to the motor, an output current detector to detect an output current flowing to the motor, and a controller to control the inverter, wherein the controller may calculate a speed ripple of the motor based on the output current and performs a control operation based on the calculated speed ripple of the motor to change a speed of the motor.

公开(公告)号：US20210301828A1

公开(公告)日：2021-09-30

申请号：US17210850

申请日：2021-03-24

Applicant: LG ELECTRONICS INC.

Inventor： Seongki Baek ,  Kiwook Lee ,  Sena Jeong

IPC: F04D27/00 ,  F04D29/051 ,  F04D29/043 ,  F04D29/66 ,  F04D27/02

Abstract: A compressor is provided. The compressor according to the present disclosure includes: one or more impellers suctioning and compressing refrigerant; a motor rotating the impeller; a rotation shaft to which the impeller and the motor are connected; a gap sensor measuring a displacement change of the rotation shaft as a frequency change; a temperature compensation sensor determining a frequency compensation value according to a temperature change around the gap sensor; and a control unit calculating a displacement amount of the rotation shaft by reflecting the frequency compensation value provided by the temperature compensation sensor and the frequency change measured by the gap sensor.

公开(公告)号：US10711387B2

公开(公告)日：2020-07-14

申请号：US15490475

申请日：2017-04-18

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon Je ,  Chungill Lee ,  Kiwook Lee

IPC: D06F39/08 ,  D06F33/02 ,  D06F37/24 ,  D06F37/30 ,  D06F37/40 ,  D06F39/00 ,  D06F39/02 ,  H02P23/04 ,  H02P21/05

Abstract: Disclosed herein is a drain pump driving apparatus and a laundry treatment machine including the same. The drain pump driving apparatus and the laundry treatment machine including the same according to an embodiment of the present invention include a motor to operate the drain pump, an inverter to convert a direct current (DC) power to an alternating current (AC) power by a switching operation and output the converted AC power to the motor, an output current detector to detect an output current flowing to the motor, and a controller to control the inverter, wherein the controller may calculate a speed ripple of the motor based on the output current and performs a control operation based on the calculated speed ripple of the motor to change a speed of the motor.

公开(公告)号：US12163269B2

公开(公告)日：2024-12-10

申请号：US17258073

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Junho Park ,  Junsung Kim ,  Kiwook Lee

IPC: D06F33/47 ,  D06F33/42 ,  D06F34/10 ,  D06F37/30 ,  D06F39/08 ,  F04D15/00 ,  F04D15/02 ,  F04D25/06 ,  D06F23/02 ,  D06F23/04 ,  D06F33/48 ,  D06F103/18 ,  D06F103/38 ,  D06F103/42 ,  D06F103/48 ,  D06F105/08 ,  D06F105/46

Abstract: The present disclosure relates to a laundry treatment machine and a method for controlling the same. A pump motor may operate according to the steps of starting up the pump motor when operating or stopping the pump motor. Upon restarting, the pump motor may be controlled to start up after being on standby until the rotor stops, and therefore the pump may run normally even in case in which the pump repeatedly stops and runs, and the drainage performance may be improved and wash water may be drained by the operation of the pump regardless of the lift level.

公开(公告)号：US12054872B2

公开(公告)日：2024-08-06

申请号：US17258219

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Wonseok Park ,  Junsung Kim ,  Kiwook Lee

IPC: D06F33/42 ,  D06F23/04 ,  D06F34/10 ,  D06F37/30 ,  D06F39/08 ,  F04D13/06 ,  F04D15/00 ,  H02P23/14 ,  D06F33/48 ,  D06F103/18 ,  D06F103/24 ,  D06F105/08 ,  D06F105/46 ,  H02P29/20

CPC classification number: D06F33/42 ,  D06F23/04 ,  D06F34/10 ,  D06F37/30 ,  D06F37/304 ,  D06F39/08 ,  D06F39/085 ,  D06F39/087 ,  F04D13/06 ,  F04D15/0066 ,  H02P23/14 ,  D06F33/48 ,  D06F2103/18 ,  D06F2103/24 ,  D06F2105/08 ,  D06F2105/46 ,  H02P29/20

Abstract: The present disclosure relates to a laundry treatment machine. A pump motor provided in a drain pump is controlled to correspond to the operation of the main motor and the water level, so that the pump motor slows down based on the speed of rotation of the main motor and the water level and keeps operating at low speed. Therefore, the pump motor is able to keep operating without stopping operation, and the amount of noise caused by the start-up of the motor is reduced, and the time taken to align the rotor of the motor in position is reduced, thereby reducing drainage time and improving the drainage performance of the drain pump.

公开(公告)号：US11970807B2

公开(公告)日：2024-04-30

申请号：US17258121

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Junho Park ,  Kiwook Lee ,  Jongseok Jung

IPC: D06F33/42 ,  D06F23/04 ,  D06F33/47 ,  D06F34/10 ,  D06F37/30 ,  D06F39/08 ,  E03C1/30 ,  F04D13/06 ,  F04D15/00 ,  F04D15/02 ,  H02P27/08 ,  D06F103/14 ,  D06F103/42 ,  D06F105/08 ,  D06F105/46 ,  H02M7/5387

CPC classification number: D06F33/42 ,  D06F23/04 ,  D06F33/47 ,  D06F34/10 ,  D06F37/30 ,  D06F37/304 ,  D06F39/08 ,  D06F39/085 ,  E03C1/30 ,  F04D13/06 ,  F04D15/0066 ,  F04D15/0245 ,  H02P27/08 ,  D06F2103/14 ,  D06F2103/42 ,  D06F2105/08 ,  D06F2105/46 ,  H02M7/53871

Abstract: The present disclosure relates to a drain pump driving apparatus and a laundry treatment machine including the same. A drain pump driving apparatus according to an embodiment of the present disclosure and a laundry treatment machine including the same include: an inverter converting a direct current (DC) voltage from a converter into an alternating current (AC) voltage based on a switching operation and to output the converted AC voltage to a drain motor; and a controller to control the motor to, when a drain channel in a drain pump is clogged, be temporarily stopped in a period during which a speed of the motor increases and then to repeatedly rotate and stop in a first direction the same as a start-up direction, and to repeatedly rotate and stop in a second direction opposite to the first direction when the drain channel is clogged even after the motor repeatedly rotates and stops in the first direction. Accordingly, when impurities are introduced into the drain pump, the impurities can be removed in a simple manner.