Lg Electronics Inc.

Chul-Gi Roh

Hyun Sook Kim

Jong-Min Shin

Yang-Jun Kang

Chang-Yong Jang

Young-Hoan Jeon

Bong-Jun Choi

Shin-Hyun Park

Man-Seok Cho

Kyeong-Bae Park

Ki-Chul Choi

Kyoung-Seok Kang

Gyoo-Jong Bae

Min-Woo Lee

Eon-Pye Hong

The present invention discloses a linear compressor which can rapidly overcome load and improve compression efficiency, by synchronizing an operation frequency of a linear motor with a natural frequency of a movable member varied by the load and varying a stroke of the movable member according to the load. The linear compressor includes a fixed member having a compression space inside, a movable member linearly reciprocated in the fixed member in the axial direction, for compressing refrigerants sucked into the compression space, one or more springs installed to elastically support the movable member in the motion direction of the movable member, spring constants of which being varied by load, and a linear motor installed to be connected to the movable member, for linearly reciprocating the movable member in the axial direction, and varying a stroke of the movable member according to a predetermined refrigeration force, so that the movable member can be linearly reciprocated to reach a top dead center.

Apparatus for controlling a linear compressor

Disclosed are an operation control device of a compressor, which can reduce motor loss by applying an AC power to a motor of the compressor without a switching operation of a control unit, and a method thereof. The operation control device of the compressor comprises: a capacitor electrically connected to a motor of the compressor and having a predetermined capacitance; a control unit connected in series to the motor of the compressor and applying an AC power to the motor of the compressor according to a control signal; and a controller detecting a load variation amount on the basis of a current and voltage applied to the motor of the compressor and controlling on/off of the control unit according to the detected load variation amount.

Operation control device and method of compressor

A linear compressor is provided. The linear compressor may include a cylinder in which refrigerant flows in an axial direction, a piston that reciprocates within the cylinder so as to compress the refrigerant, and a linear motor that drives the piston. At least one of the cylinder or the piston may be sintering molded.

Linear compressor

The present invention discloses an apparatus and method for controlling a linear compressor which can actively handle load and efficiently perform an operation, by synchronizing an operation frequency with a natural frequency of a movable member varied by the load. The apparatus for controlling the linear compressor includes a counter electromotive force phase detecting unit for detecting a phase of a counter electromotive force from a voltage command value of the linear compressor and an input current, a current phase detecting unit for detecting a phase of the input current, a frequency generating unit for comparing the phase of the counter electromotive force with the phase of the input current, and generating a frequency change value, a control unit for correcting the voltage command value according to the frequency change value, and an inverter unit for receiving a direct current voltage, generating a sine wave voltage according to the corrected voltage command value, and applying the sine wave voltage to the linear compressor.

Growing community of inventors

Changwon-shi, South Korea

Chul-Gi Roh