公开(公告)号：US11698074B2

公开(公告)日：2023-07-11

申请号：US16921081

申请日：2020-07-06

Applicant: LG ELECTRONICS INC.

Inventor： Cheolmin Kim ,  Jinhee Jeong ,  Hyunwook Han ,  Uisik Hwang ,  Jungho Kang ,  Heewoong Lee

IPC: F04D17/12 ,  F25B31/02 ,  F04D25/02

CPC classification number: F04D17/122 ,  F04D25/02 ,  F25B31/026 ,  F05B2240/30

Abstract: A turbo compressor includes a housing with a refrigerant suction hole, through which a refrigerant is introduced, at a front portion thereof, and a motor case defining an accommodation space. The accommodation space includes a rotation shaft extending in a front-rear direction and a motor that is configured to rotate the rotation shaft. A first impeller is coupled to one end of the rotation shaft and a second impeller is coupled to the other end of the rotation shaft. The first impeller is configured to primarily compress the refrigerant introduced into the refrigerant suction hole. A connection passage, that surrounds the motor case extends backward from an outlet of the first impeller. The second impeller is configured to secondarily compress the refrigerant introduced through the connection passage.

公开(公告)号：US11624533B2

公开(公告)日：2023-04-11

申请号：US17171260

申请日：2021-02-09

Applicant: LG ELECTRONICS INC.

Inventor： Jungho Kang ,  Jinhee Jeong ,  Hyunwook Han ,  Uisik Hwang ,  Heewoong Lee ,  Cheolmin Kim

IPC: F25B39/00 ,  F25B39/02

Abstract: An evaporator including a housing with a refrigerant inlet and a refrigerant outlet; heat transfer tubes contained in the housing, in which chilled water for heat exchange with refrigerant inside of the housing flows; at least one distribution tray placed apart from the heat transfer tubes and having a plurality of holes for distributing refrigerant over the underlying heat transfer tubes; a vapor-liquid separator that is placed above the distribution tray and separates an introduced mixed refrigerant into vapor refrigerant and liquid refrigerant and distributes the liquid refrigerant to the distribution tray; and at least one tube support with a plurality of holes for passing the heat transfer tubes through, that is placed inside of the housing and supports the distribution tray.

公开(公告)号：US20210324860A1

公开(公告)日：2021-10-21

申请号：US17230052

申请日：2021-04-14

Applicant: LG ELECTRONICS INC.

Inventor： Uisik HWANG ,  Jinhee Jeong ,  Hyunwook Han ,  Jungho Kang ,  Heewoong Lee ,  Cheolmin Kim

IPC: F04D1/06 ,  F25B31/02 ,  F04D13/02 ,  F04D29/043 ,  F04D29/22 ,  F04D29/44 ,  F04D29/041 ,  F04D29/048

Abstract: The present disclosure relates to a compressor including: a first impeller suctioning a refrigerant in an axial direction and compressing the refrigerant in a direction forming an acute angle with the axial direction; a second impeller suctioning the refrigerant, compressed by the first impeller, in the axial direction and compressing the refrigerant in a centrifugal direction; a motor rotating the first impeller and the second impeller; and a rotating shaft coupled with the first impeller, the second impeller, and the motor, wherein the first impeller is coupled to one end in the axial direction of the rotating shaft, and the second impeller is coupled to the other end in the axial direction of the rotating shaft; and the first impeller and the second impeller suction the refrigerant in a same direction.

公开(公告)号：US20210254873A1

公开(公告)日：2021-08-19

申请号：US17172256

申请日：2021-02-10

Applicant: LG ELECTRONICS INC.

Inventor： Jungho KANG ,  Jinhee Jeong ,  Hyunwook Han ,  Uisik Hwang ,  Heewoong Lee ,  Cheolmin Kim

IPC: F25B39/02 ,  F28D3/04 ,  F28D3/02

Abstract: An evaporator comprises: a housing with a refrigerant inlet and a refrigerant outlet; heat transfer tubes that are contained in the housing, in which chilled water for heat exchange with refrigerant inside the housing flows; at least one distribution tray that is placed apart from the heat transfer tubes and has a plurality of holes for distributing refrigerant over the underlying heat transfer tubes; a vapor-liquid separator that is placed apart from the bottom of the distribution tray and separates an introduced refrigerant into a vapor refrigerant and a liquid refrigerant; and a pair of support frames that are fixed to either side of the width direction of the housing, wherein the vapor-liquid separator comprises: a chamber that has an inlet port communicating with the refrigerant inlet, a vapor refrigerant exit communicating with the refrigerant outlet, and a plurality of holes formed in the bottom to distribute the liquid refrigerant to the distribution tray; and a plurality of side arms that are formed on either side of the chamber and arranged in the length direction of the chamber and supported by the support frames. Through the present disclosure, it is possible to keep the vapor-liquid separator horizontal and stable and achieve stable heat exchange performance.

公开(公告)号：US20210254871A1

公开(公告)日：2021-08-19

申请号：US17171260

申请日：2021-02-09

Applicant: LG ELECTRONICS INC.

Inventor： Jungho KANG ,  Jinhee Jeong ,  Hyunwook Han ,  Uisik Hwang ,  Heewoong Lee ,  Cheolmin Kim

IPC: F25B39/00

Abstract: An evaporator comprises: a housing with a refrigerant inlet and a refrigerant outlet; heat transfer tubes that are contained in the housing, in which chilled water for heat exchange with refrigerant inside the housing flows; at least one distribution tray that is placed apart from the heat transfer tubes and has a plurality of holes for distributing refrigerant over the underlying heat transfer tubes; a vapor-liquid separator that is placed above the distribution tray and separates an introduced mixed refrigerant into a vapor refrigerant and a liquid refrigerant and distributes the liquid refrigerant to the distribution tray; and a tube support with a plurality of holes for passing the heat transfer tubes through, that is placed inside the housing and supports the distribution tray. Through the present disclosure, it is possible to achieve stable heat exchange performance by separating a mixed refrigerant and distributing only a liquid refrigerant and placing the distribution tray horizontal and stable.

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.

公开(公告)号：US10208989B2

公开(公告)日：2019-02-19

申请号：US15256894

申请日：2016-09-06

Applicant: LG ELECTRONICS INC.

Inventor： Hyunuk Cho ,  Jinhee Jeong ,  Sangchul Nam ,  Wansoo Lee ,  Heungju Lee ,  Yongsun Cho

IPC: F25B15/00 ,  F25B15/06

Abstract: An absorption refrigeration machine may include a first regenerator for primarily regenerating an absorbing liquid absorbing a refrigerant; a second regenerator for secondarily regenerating the absorbing liquid primarily regenerated from the first regenerator; an auxiliary absorber provided with the second regenerator, to allow an auxiliary absorbing liquid to absorb the refrigerant; and an auxiliary regenerator for regenerating the auxiliary absorbing liquid carrying the refrigerant in the auxiliary absorber.