公开(公告)号：US20210164152A1

公开(公告)日：2021-06-03

申请号：US17048660

申请日：2019-04-19

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Kiwook LEE

IPC: D06F39/08 ,  D06F33/42 ,  D06F33/34 ,  D06F33/47

Abstract: The present disclosure relates to a laundry treatment machine. The laundry treatment machine according to an embodiment of the present disclosure includes a controller configured to start dewatering after a first period from completion of drainage when a lift is at a first level, and to start the dewatering after a second period from the completion of the drainage when the lift is at a second level greater than the first level, wherein the second period is longer than the first period. Accordingly, based on the lift, it is possible to change the dewatering entry period after drainage is completed.

公开(公告)号：US20210116155A1

公开(公告)日：2021-04-22

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

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：US20190127900A1

公开(公告)日：2019-05-02

申请号：US16177859

申请日：2018-11-01

Applicant: LG Electronics Inc.

Inventor： Kiwook LEE ,  Jungmoon JE

IPC: D06F33/02 ,  D06F39/08 ,  D06F39/00

Abstract: The present invention provides a laundry treating apparatus including a drain pump having a motor, an inverter unit to transfer power to the motor, and a control unit to control the inverter unit to operate the drain pump, wherein the control unit sets an operation mode of the drain pump based on a current flowing in a part of the inverter unit, and controls the inverter unit based on the set operation mode.

公开(公告)号：US20170302208A1

公开(公告)日：2017-10-19

申请号：US15490475

申请日：2017-04-18

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Chungill LEE ,  Kiwook LEE

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

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：US20170276616A1

公开(公告)日：2017-09-28

申请号：US15470108

申请日：2017-03-27

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook LEE ,  Chanmyung PARK ,  Namsoo LEE ,  Jinhee JEONG

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

CPC classification number: G01N21/954 ,  F25B31/026 ,  F25B39/00 ,  F25B39/02 ,  F25B39/04 ,  F25B45/00 ,  F25B49/02 ,  F25B2339/0242 ,  F25B2339/046 ,  F25B2345/001 ,  F25B2345/006 ,  F25B2500/06 ,  F25B2500/222 ,  G01M15/14 ,  G01N2021/9546

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：US20210189623A1

公开(公告)日：2021-06-24

申请号：US17258073

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Junho PARK ,  Junsung KIM ,  Kiwook LEE

IPC: D06F33/47 ,  D06F39/08 ,  F04D15/00 ,  F04D15/02 ,  F04D25/06

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：US20210156066A1

公开(公告)日：2021-05-27

申请号：US17048927

申请日：2019-04-19

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Chungill LEE ,  Kiwook LEE

IPC: D06F33/42 ,  D06F39/08 ,  D06F34/14 ,  D06F34/08 ,  F04D25/06 ,  F04D27/00 ,  H02P6/17 ,  H02P6/28

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 includes a controller configured to drive a motor, during drainage, based on an output current and a direct current (DC) terminal voltage with a first power when a lift is at a first level and to drive the motor with the first power when the lift is at a second level that is greater than the first level, wherein the lift is a difference between a water level of a water introduction part through which water flows into a drain pump and a water level of a water discharge part through which the water is discharged out of the drain pump. Accordingly, water pumping can be performed smoothly even if the lift is changed during the drainage.

公开(公告)号：US20200308754A1

公开(公告)日：2020-10-01

申请号：US16900030

申请日：2020-06-12

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Chungill LEE ,  Kiwook LEE

IPC: D06F39/08 ,  H02P21/05 ,  D06F33/00 ,  D06F34/28 ,  D06F37/24 ,  D06F37/30 ,  D06F37/40 ,  D06F39/02 ,  H02P23/04

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：US20190352835A1

公开(公告)日：2019-11-21

申请号：US16476956

申请日：2018-01-08

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Kiwook LEE

IPC: D06F39/08 ,  D06F33/02 ,  F04B49/06 ,  F04B17/03 ,  H02P27/06

Abstract: According to the present invention, a control method for a clothing treatment device comprises the steps of: transmitting a power-related order to a motor that provides electric power to a drain pump in order to perform a dehydration process; detecting a unit revolution count of the motor while the dehydration process is performed; determining whether the detected unit revolution count exceeds a preset limited revolution count; reducing the unit revolution count of the motor to a predetermined unit revolution count if the detected unit revolution count exceeds the limited revolution count; and repeatedly transmitting the power-related order to the motor.

公开(公告)号：US20180058460A1

公开(公告)日：2018-03-01

申请号：US15684557

申请日：2017-08-23

Applicant: LG ELECTRONICS INC.

Inventor： Namsoo LEE ,  Solji RYU ,  Kiwook LEE ,  Seongmin JANG

IPC: F04D27/00 ,  F25B31/02 ,  F04D29/058 ,  F04D29/053 ,  G01B7/14

CPC classification number: F04D27/001 ,  F04D29/053 ,  F04D29/058 ,  F04D29/286 ,  F25B1/053 ,  F25B31/026 ,  F25B39/00 ,  F25B49/025 ,  F25B2339/0242 ,  F25B2339/047 ,  F25B2400/077 ,  G01B7/14

Abstract: The present invention provides a compressor that includes: one or more impellers that axially suck and centrifugally compress a refrigerant; a rotary shaft that is connected with the impeller and a motor for rotating the impeller; a plurality of magnetic bearings that supports the rotary shaft in the air so that the rotary shaft can rotate; a gap sensor that senses the distance from the rotary shaft; and a controller that determines abnormal wire connection of the magnetic bearings on the basis of information from the gap sensor. The controller can sense movement of the rotary shaft through the gap sensor while controlling the amount of current supplied to any one of the magnetic bearings and can determine whether there is abnormal wire connection on the basis of the information.