公开(公告)号：US10808711B2

公开(公告)日：2020-10-20

申请号：US15684557

申请日：2017-08-23

Applicant: LG ELECTRONICS INC.

Inventor： Namsoo Lee ,  Solji Ryu ,  Kiwook Lee ,  Seongmin Jang

IPC: F25B49/02 ,  F04D27/00 ,  F04D29/053 ,  F04D29/058 ,  F04D29/28 ,  F25B31/02 ,  G01B7/14 ,  F25B1/053 ,  F25B39/00

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.

公开(公告)号：US10544532B2

公开(公告)日：2020-01-28

申请号：US15617808

申请日：2017-06-08

Applicant: LG ELECTRONICS INC.

Inventor： Kihoon Choi ,  Junho Lee ,  Seongmin Jang ,  Jonghwan Lee ,  Woonghui Won ,  Jongseok Jung ,  Sangwook Lee

IPC: D06F33/02 ,  D06F29/02 ,  D06F37/04 ,  D06F37/12 ,  D06F37/22 ,  D06F37/26 ,  D06F37/30 ,  D06F37/36 ,  D06F39/00 ,  D06F39/02 ,  D06F39/04 ,  D06F39/08 ,  D06F39/14 ,  D06F35/00 ,  D06F58/02

Abstract: A method of controlling a laundry treatment apparatus, the method including: determining whether bubbles have been generated in a tub of the laundry treatment apparatus in a state in which a second washing apparatus of the laundry treatment apparatus is operated based on a sequence of operations; and based on a determination that bubbles have been generated, reducing bubbles by (i) adding at least one first operation to the sequence of operations or (ii) replacing at least one second operation of the sequence of operations, is disclosed.

公开(公告)号：US11066770B2

公开(公告)日：2021-07-20

申请号：US16746182

申请日：2020-01-17

Applicant: LG ELECTRONICS INC.

Inventor： Kihoon Choi ,  Junho Lee ,  Seongmin Jang ,  Jonghwan Lee ,  Woonghui Won ,  Jongseok Jung ,  Sangwook Lee

IPC: D06F33/00 ,  D06F34/18 ,  D06F34/28 ,  D06F29/02 ,  D06F37/04 ,  D06F37/12 ,  D06F37/22 ,  D06F37/26 ,  D06F37/30 ,  D06F37/36 ,  D06F39/02 ,  D06F39/04 ,  D06F39/08 ,  D06F39/14 ,  D06F23/04 ,  D06F39/06 ,  D06F29/00 ,  D06F35/00 ,  D06F58/02

Abstract: A method of controlling a laundry treatment apparatus includes: determining whether bubbles have been generated in a tub of the laundry treatment apparatus in a state in which a second washing apparatus of the laundry treatment apparatus is operated based on a sequence of operations; and based on a determination that bubbles have been generated, reducing bubbles by (i) adding at least one first operation to the sequence of operations or (ii) replacing at least one second operation of the sequence of operations.

公开(公告)号：US10962020B2

公开(公告)日：2021-03-30

申请号：US16329180

申请日：2016-10-21

Applicant: LG ELECTRONICS INC.

Inventor： Kiwook Lee ,  Seongmin Jang ,  Jinhee Jeong ,  Chanmyung Park ,  Solji Ryu

IPC: F04D29/058 ,  F04D29/056 ,  F25B31/02 ,  F04D29/05 ,  F25B31/00 ,  F04D17/10 ,  F04D29/051

Abstract: A compressor including a motor having a rotary shaft, a rotor and a stator, and an impeller at a front end of the rotary shaft to suction refrigerant in an axial direction and compress the refrigerant in a centrifugal direction. The compressor has a collar at a rear end of the rotary shaft and coupled to the rotary shaft to be extended outwardly in a radial direction of the rotary shaft. Radial bearings support a radial movement of the rotary shaft at a front and rear of the stator. A thrust bearing prevents an axial movement of the rotary shaft. A mechanical backup bearing also prevents the axial movement of the rotary shaft. A fixing unit supports the backup bearing at the rear end of the rotary shaft, wherein the backup bearing is arranged to overlap the thrust bearing in the radial direction of the rotary shaft.

公开(公告)号：US11193226B2

公开(公告)日：2021-12-07

申请号：US16234088

申请日：2018-12-27

Applicant: LG Electronics Inc.

Inventor： Jongseok Jung ,  Seongmin Jang ,  Bokyung Cho

IPC: D06F39/04 ,  D06F33/44 ,  D06F37/38 ,  D06F23/04 ,  D06F39/08 ,  D06F37/30 ,  D06F103/16 ,  D06F103/18 ,  D06F105/10 ,  D06F105/56 ,  D06F34/28

Abstract: A laundry treatment apparatus includes a tub that stores wash water; a drum rotatably disposed in the tub; a heater that heats wash water in the tub; a temperature sensor that senses a temperature of wash water; an output unit that displays at least one operation setting of the laundry treatment apparatus; and a controller configured to: determine an initial operation time based on the at least one operation setting; output the initial operation time through the output unit; determine an operation time based on (i) the temperature of wash water sensed by the temperature sensor during a supply of water to the tub and (ii) a level of wash water supplied to the tub; and output the operation time through the output unit.

公开(公告)号：US10799021B2

公开(公告)日：2020-10-13

申请号：US15607848

申请日：2017-05-30

Applicant: LG ELECTRONICS INC.

Inventor： Changgyu Choi ,  Jongseok Jung ,  Seongmin Jang ,  Junho Lee ,  Jihong Lee ,  Kwanwoong Jeong

IPC: A47B47/03 ,  D06F39/02 ,  D06F39/14 ,  D06F39/08 ,  D06F35/00 ,  D06F39/00 ,  D06F39/12 ,  D06F29/00 ,  D06F31/00 ,  D06F23/04

Abstract: A laundry treatment apparatus that includes: a cabinet; a first cabinet door; a second cabinet door; a first washing apparatus; and a second washing apparatus including: a tub that is accessible through a second opening in a state in which the second cabinet door is opened, that is configured to store water, and that includes a tub opening at a top of the tub, a tub cover that is coupled to the tub and that covers the tub opening, and a drum that is configured to rotate about a shaft, the shaft extending in the second direction, wherein the tub cover includes an air channel unit that is configured to transfer air between an interior area of the tub and an exterior area of the tub in a state in which the second washing apparatus is operational is disclosed.

公开(公告)号：US10480922B2

公开(公告)日：2019-11-19

申请号：US15615064

申请日：2017-06-06

Applicant: LG ELECTRONICS INC. ,  THE INDUSTRY & ACADEMIC COOPERATION IN CHUNGNAM NATIONAL UNIVERSITY

Inventor： Namsoo Lee ,  Myounggyu Noh ,  Soyoon Kim ,  Seongmin Jang ,  Jinhee Jeong ,  Seongki Baek ,  Sunggyu Nam

IPC: H02K7/09 ,  G01B5/14 ,  F16C32/04 ,  G01M13/04

Abstract: A method of measuring a center error between bearings includes disposing both sides of a rotation shaft on inner circumferential surfaces of a magnetic bearing and a backup bearing, applying current to the magnetic bearing to produce movement of the rotation shaft, determining a contact point between the rotation shaft and the backup bearing according to movement of the rotation shaft, determining a final target value using the contact point and predetermined position information of the magnetic bearing, determining a magnetic center of the magnetic bearing through the final target value, comparing the magnetic center of the magnetic bearing and a mechanical center of the backup bearing to determine a center error, and aligning the magnetic center of the magnetic bearing and the mechanical center of the backup bearing based on the determined center error.