A LINEAR COMPRESSOR

摘要

The present invention relates to a linear compressor. The linear compressor according to an embodiment of the present invention includes a shell that is provided with a refrigerant suction unit; an outer stator that is provided in the shell and is provided with a coil; an inner stator that is arranged apart from the outer stator; a permanent magnet that is movably arranged between the outer stator and the inner stator; a cylinder including a compression space in which a refrigerant suctioned by the refrigerant suction unit is compressed; a piston that is coupled with the permanent magnet and is provided to be capable of reciprocating in the cylinder; a first surface treatment section that is provided in the piston and has a first measured hardness value; and a second surface treatment section that is provided in the cylinder and defines a second hardness value at which a hardness difference from the first hardness value is formed to be at least a predetermined value.