Lg Electronics Inc.

Seung-Mun An

Seung-Jun Lee

Kang-Wook Cha

Young-Ju Bae

Joon-Hong Park

A multi-stage rotary compressor comprises: a casing having a sealed space therein; a driving unit installed in the casing, for generating a driving force; a first compression unit and a second compression unit for receiving the driving force from the driving unit and compressing a refrigerant; and a connection unit for connecting the first and second compression units and guiding the refrigerant discharged from the second compression unit to be sucked directly in the first compression unit and then re-compressed, by which it is possible to vary capacity, even using every plurality of compression units, and to obtain power saving effect suitable for a saving mode.

Multi-stage rotary compressor

An air conditioner comprises: a first compression unit (C) and a second compression unit (C) for respectively compressing a refrigerant; an outdoor heat exchanger () provided at an outdoor unit and connected via the secondcontrol valve () to the first compression unit (C) and the second compression unit (C); and indoor heat exchanger () provided at an indoor unit is connected via the secondcontrol valve () to the first compression unit (C) and the second compression unit (C) and via the expansion valve () to the outdoor heat exchanger; and a first control valve () for controlling a refrigerant flow by selectively connecting the first compression unit (C) and the second compression unit (C) in series or in parallel. As the first compression unit (C) and the second compression unit (C) are selectively connected to each other in series or in parallel, a capacity of the air conditioner is varied according to a change of an indoor temperature and fabrication cost is minimized.

Growing community of inventors

Gyeongsangnam-do, South Korea

Seung-Mun An