Plurality of outer resonance springs for a linear compressor

Abstract

A linear compressor including: a cover fixed at a rear side of a frame; a cylinder fixedly installed in a horizontal direction at the center of inside of the frame; an inner stator assembly fixedly installed at the frame in a state that its inner circumferential surface contacts an outer circumferential surface of the cylinder; an outer stator assembly fixedly installed at the frame, being spaced apart from the inner stator assembly to the outer periphery for a predetermined distance; a magnet assembly incorporated with a piston, making a linear reciprocal movement with one end portion thereof inserted in the gap between the inner stator assembly and the outer stator assembly; at least one inner resonance spring supported by the magnet assembly; and a plurality of outer resonance springs supported between the magnet assembly and the cover. With this construction, the gap between the cylinder and the inner stator assembly is is removed, reducing the inner diameter of the inner stator assembly, according to which the inner diameter of the magnet assembly is minimized, remarkably reducing the amount of the magnet to be used and the size of the motor, and thus, its production cost can be much reduced. In addition, since the inner resonance springs or the outer resonance spring are provided in plural number, its spring force can be dispersed and the mechanical reliability of the magnet assembly is highly improved.