Patent ID: 7537438

Claim:
A reciprocating compressor, comprising: a frame disposed in a casing; a piston fixedly installed at the frame, and having a suction passage; a cylinder having a compression space configured to compress a refrigerant by inserting the piston, and reciprocating with respect to the piston; an inner stator inserted into an outer circumferential surface of the cylinder; a magnet mounted on an outer circumferential surface of the inner stator; an outer stator having a certain air gap from the inner stator, and having a coil that forms a magnetic flux together with the magnet so that the cylinder reciprocates together with the inner stator and the magnet; and a resonant spring unit connected to the cylinder, for providing a resonant motion to a reciprocating motion of the cylinder, wherein the resonant spring unit comprises: a spring sheet panel fixed to the cylinder; and a plurality of springs provided at both sides of the spring sheet panel.