Lg Electronics Inc.

Kyo Lyong Kang

Jin Seok Hu

Shin Hyun Park

Young Geul Kim

A linear compressor for adjusting a variable rate of a cooling capacity is provided. The linear compressor may include a fixed member having a compression space formed therein, a movable member linearly reciprocated in the fixed member to compress a refrigerant drawn into the compression space, one or more springs provided to elastically support the movable member in the motion direction of the movable member, a motor unit including a motor connected to the movable member to linearly reciprocate the movable member in the axial direction and a capacitor connected in series to the motor, and a motor control unit controlling an AC voltage applied to the motor to adjust a variable rate of a cooling capacity by the reciprocation of the movable member.

Linear compressor

The present invention discloses a linear compressor which makes it possible to precisely operate a voltage using a current without having a high-capacity capacitor connected in series to a motor. The linear compressor comprises a mechanical unit including a fixed member having a compression space therein, a movable member linearly reciprocated in the fixed member to compress a refrigerant sucked into the compression space, one or more springs provided to elastically support the movable member in the motion direction of the movable member, and a motor connected to the movable member to linearly reciprocate the movable member in the axial direction, and an electric control unit including a rectification unit receiving AC power and outputting a DC voltage, an inverter unit receiving the DC voltage, converting the DC voltage to an AC voltage according to a control signal, and supplying the AC voltage to the motor, a current sensing unit sensing a current flowing between the motor and the inverter unit, an integrator circuit unit integrating a voltage corresponding to the current from the current sensing unit, and a control unit receiving an integrated value from the integrator circuit unit and controlling the AC voltage applied to the motor to permit the reciprocation of the movable member.

Growing community of inventors

Changnyeong-gun, South Korea

Kyo Lyong Kang