公开(公告)号：US20210317834A1

公开(公告)日：2021-10-14

申请号：US17259603

申请日：2019-09-06

Applicant: LG ELECTRONICS INC.

Inventor： Chungill LEE ,  Jinseong HWANG ,  Kiwook LEE ,  Jeongkeun CHOI

IPC: F04D25/06 ,  D06F39/08 ,  F04D29/22

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 to convert an input direct current (DC) voltage into an alternating current (AC) voltage by a switching operation and to output the converted AC voltage to a drain motor; an output current detector to detect an output current flowing in the drain motor; and a controller to control the drain motor to rotate in a first direction during a first period, rotate in a second direction opposite to the first direction during a second period, and continuously rotate in the first direction when a level of the output current at rotation in the first direction is greater than a level of the output current at rotation in the second direction. Accordingly, it is possible to secure a pumping performance of the drain pump.

公开(公告)号：US20210285141A1

公开(公告)日：2021-09-16

申请号：US17258219

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Wonseok PARK ,  Junsung KIM ,  Kiwook LEE

IPC: D06F33/42 ,  D06F39/08 ,  D06F37/30 ,  D06F23/04 ,  F04D15/00 ,  F04D13/06 ,  H02P23/14

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：US20210156065A1

公开(公告)日：2021-05-27

申请号：US17048682

申请日：2019-04-19

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Kiwook LEE

IPC: D06F33/42 ,  D06F39/08 ,  D06F33/48 ,  D06F34/08 ,  D06F34/14 ,  F04D25/06 ,  F04D27/00 ,  H02P6/17 ,  H02P6/28

Abstract: The present disclosure relates to a laundry treatment machine. According to an embodiment of the present disclosure, a laundry treatment machine includes a controller controlling a motor, during dewatering, to be driven at a first speed when a lift is at a first level and to drive the motor at a second speed greater than the first speed when the lift is at a second level 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, noise or vibration can be reduced even if the lift is changed during the dewatering.

公开(公告)号：US20210207305A1

公开(公告)日：2021-07-08

申请号：US17258063

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Junsung KIM ,  Kiwook LEE ,  Jongseok JUNG

IPC: D06F33/42 ,  D06F34/10 ,  D06F37/36 ,  D06F39/08

Abstract: The present disclosure relates to a laundry treatment machine and a method for controlling the same. An increased amount of wash water during dewatering is introduced into a pump by decreasing the speed of a pump motor provided in the pump and increasing it again based on changes in the speed of the main motor during dewatering, and the wash water introduced while the speed of the pump motor is increasing is drained. Thus, the amount of noise generated during drainage may be reduced, drainage performance may be improved, and drainage time may be shortened.

公开(公告)号：US20190277300A1

公开(公告)日：2019-09-12

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

Abstract: The present invention relates to a compressor and a chiller system including the compressor, the compressor comprising: one or more impellers for suctioning a refrigerant in an axial direction and compressing the same in a centrifugal direction; a rotary shaft formed so as to rotate the impeller; a collar coupled to the rotary shaft so as to extend outward in the radial direction of the rotary shaft; a thrust magnetic bearing formed so as to support the collar by means of a magnetic field, thereby preventing axial movement of the rotary shaft; and a mechanical backup bearing formed so as to prevent axial movement of the rotary shaft, wherein the backup bearing is disposed so as to overlap a portion of the thrust magnetic bearing in the radial direction of the rotary shaft.

公开(公告)号：US20190127903A1

公开(公告)日：2019-05-02

申请号：US16094613

申请日：2017-04-18

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Chungill LEE ,  Kiwook LEE

IPC: D06F37/30 ,  D06F39/08 ,  D06F33/02 ,  H02P27/12 ,  H02P21/14 ,  H02P21/18 ,  H02P21/22

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：US20210277562A1

公开(公告)日：2021-09-09

申请号：US17258121

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Junho PARK ,  Kiwook LEE ,  Jongseok JUNG

IPC: D06F33/42 ,  H02P27/08 ,  D06F39/08 ,  D06F37/30 ,  D06F33/47 ,  D06F34/10 ,  D06F23/04 ,  F04D13/06 ,  F04D15/02 ,  F04D15/00 ,  E03C1/30

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.

公开(公告)号：US20210222340A1

公开(公告)日：2021-07-22

申请号：US17258058

申请日：2019-07-05

Applicant: LG ELECTRONICS INC.

Inventor： Wonseok PARK ,  Jieon KIM ,  Kiwook LEE

IPC: D06F34/10 ,  D06F33/42 ,  D06F37/30 ,  D06F39/08

Abstract: The present disclosure relates to a laundry treatment machine. A laundry treatment machine comprises: an inverter to convert the DC voltage from the converter into alternating current (AC) voltage by a switching operation and to output the converted AC voltage to a motor; and a controller that controls such that, while a washing tub motor is rotating at a constant speed, a drain motor operates in a first period during which the speed of the drain motor increases, a second period during which the speed of the drain motor decreases after the first period, and a third period during which the speed of the drain motor decreases after the second period, wherein a rising slope in the second period is less than a falling slope in the third period. Accordingly, a speed ripple of the drain motor may be reduced.

公开(公告)号：US20210148032A1

公开(公告)日：2021-05-20

申请号：US17048732

申请日：2019-04-19

Applicant: LG ELECTRONICS INC.

Inventor： Jungmoon JE ,  Kiwook LEE

IPC: D06F33/42 ,  D06F37/36 ,  D06F39/08 ,  D06F34/10 ,  D06F34/14

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 increase or decrease stepwise a speed of a motor during dewatering. Accordingly, it is possible to reduce a speed ripple during dewatering.

公开(公告)号：US20160377086A1

公开(公告)日：2016-12-29

申请号：US15052954

申请日：2016-02-25

Applicant: LG ELECTRONICS INC.

Inventor： Namsoo LEE ,  Jinhee JEONG ,  Kiwook LEE ,  Soyoon KIM

IPC: F04D27/00 ,  F04D29/28 ,  F04D29/053 ,  F04D17/12 ,  F04D29/058

CPC classification number: F04D27/001 ,  F04D17/12 ,  F04D29/058 ,  F05D2270/821 ,  F25B1/04 ,  F25B2339/047

Abstract: A compressor and a chiller system including a compressor are provided. The compressor may include one or more impellers that draws a refrigerant in an axial direction and compresses the refrigerant in a radial direction, a rotating shaft that rotates the one or more impellers, and at least one displacement sensor that detects a displacement of the rotating shaft. The displacement sensor may include a flexible circuit board and coils provided on both sides of the flexible circuit board. The flexible circuit board may include a plurality of boards which may be connected to each other by one or more connectors.

Abstract translation: 提供了包括压缩机的压缩机和冷却器系统。 压缩机可以包括一个或多个在轴向上拉制冷剂并沿径向压缩制冷剂的叶轮，使一个或多个叶轮旋转的旋转轴以及检测旋转轴的位移的至少一个位移传感器 。 位移传感器可以包括柔性电路板和设置在柔性电路板两侧的线圈。 柔性电路板可以包括可以通过一个或多个连接器彼此连接的多个板。