Lg Electronics Inc.

Moon-Chang Choi

Young-Kwan Kim

Sang-Wook Lee

Yoo-Chol Ji

Kwang-Ha Suh

Hyeong-Seok Kim

Dae-Sung Wang

Hoi-Sun Kim

Kwang-ha Suh

A system for cooling a turbo compressor includes two compressing parts on opposite ends of a rotational shaft driven by a motor. Fluid from a fluid chamber within the casing of the device is supplied to a bearing chamber when the temperature of the bearing chamber increases. A supply passage is formed in a first support where the radial bearing for supporting a load in the axial direction is formed. The open-and-shut valve supplies fluid when the temperature of the bearing chamber increases.

Thrust bearing cooling unit for a turbo compressor

A cooling system, which includes a compressor for compressing the refrigerant by operation of a motor, a condenser, an expansion means, and an evaporator, comprises a motor cooling device for cooling down the motor by making some of the refrigerant passed the condenser flow to the compressor according to temperature of the motor, and therefore the heat of high temperature generated from the motor in the compressor during the operation of the compressor which is used in the cooling system can be cooled down efficiently.

Cooling system and cooling method

A centrifugal compressor includes first and second impellers coupled to opposite ends of a drive shaft. Each impeller includes a hub with a plurality of blades on a front face. The blades compress a fluid, while forcing the fluid off an outer periphery of the hub. At least one of the impellers includes a plurality of uniformly shaped pressure attenuating grooves provided around its outer periphery. The pressure attenuating grooves reduce an axial load applied to the impeller, and act to balance the overall resultant axial load applied to the drive shaft by the two impellers, thereby reducing wear on thrust bearings engaging the rotating drive shaft.

Centrifugal compressor structure with impellers

A turbo compressor is disclosed. The compressor includes a hermetically sealed shell, a motor chamber formed at a center portion of the shell, a driving motor installed in the motor chamber, a driving shaft engaged with the driving motor having its one end inserted into a first compression chamber and its other end inserted into a second compression chamber with said first and second compression chambers being formed at both sides of the shell, first and second impellers disposed in the first and second compression chambers in a face-to-face form and rotatably engaged with both ends of the driving shaft, and a gas flow path through which a refrigerant gas is sucked for thereby first compressing the gas in the first compression chamber and discharging to the second compression chamber for thereby implementing a small size compressor, decreasing the number of parts and increasing a compression efficiency.

Turbo compressor

A motor cooling structure for a turbo compressor is disclosed. The structure includes a refrigerant suction tube communicating with one lateral wall of the sealed container and extended from the evaporator, a first refrigerant flow tube communicating with another lateral wall of the sealed container, with the first refrigerant flow tube communicating with the first compression chamber, a second refrigerant flow tube through which the first compression chamber communicates with the second compression chamber, and a refrigerant discharge tube communicating with the second compression chamber communicating with a condenser, for thereby enhancing a cooling efficiency of the driving motor by directly introducing a low temperature refrigerant from an evaporator into a motor chamber.

Growing community of inventors

Gwangmyeong, South Korea

Moon-Chang Choi