Lg Electronics Inc.

Solji Ryu

Kiwook Lee

Seongmin Jang

Youngjin Kim

Jinhee Jeong

Namsoo Lee

Chanmyung Park

Joongbeom Lee

A chiller including a heat transfer tube and a method for controlling a chiller to determine a degree of contamination of a heat transfer tube are provided. As a degree of contamination of the heat transfer tube may be determined and a notification provided to a user regarding whether to clean the heat transfer tube, the chiller may be managed efficiently and an operation performance of the chiller may be maintained well.

Chiller including heat transfer tube and method for controlling chiller to determine degree of contamination of the heat transfer tube

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.

Compressor and chiller system including same

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.

Compressor and the compressor controlling method

Growing community of inventors

Seoul, South Korea

Solji Ryu