Patent ID: 8561521
Filing Date: 2013-10-22
Classification: F04B

Abstract:
1. A linear compressor, comprising: a stationary member including a cylinder for providing a space for compressing a refrigerant wherein an inner stator fixed to the outer periphery of the cylinder, a frame formed integral with the cylinder or coupled to the cylinder, a stator cover fastened to the frame for fixing an outer stator between the frame and the stator cover, and a back cover fastened to the rear of the stator cover; a movable member linearly reciprocating with respect to the stationary member, and including a piston for compressing the refrigerant inside the cylinder, a permanent magnet connected to the piston to be linearly reciprocated along with the piston between the inner stator and the outer stator and a supporter piston having a center coinciding with the center of the piston, connected to the rear of the piston and having support portions extended in a radial direction from the center and guide portions extended in a different radial direction from the center, guide holes and bolt holes being formed at the guide portions of the supporter piston; a plurality of front main springs positioned so as to be symmetrical with the center of the piston and the supporter piston, one end of which being supported by the front surface of the support portion of the supporter piston and the other ends of which being supported by the rear of the stator cover; a single rear main spring having a center coinciding with the center of the piston and the supporter piston, one end of which being supported by the back surface of the supporter piston and the other end of which being supported by the back cover; and a spring guide positioned between the supporter piston and the single rear main spring, the one end of the rear main spring being supported by the spring guide, the spring guide including an approximately circular body and guide portions at both sides of the body, and guide holes and bolt holes being formed at the guide portions of the spring guide, wherein the spring guide is bolt-fastened at the bolt holes of the supporter piston and spring guide in the state that the guide holes of the supporter piston made consistent with the guide holes of the spring guide by inserting guide pins through the guide holes of the supporter piston and the spring guide.