Patent ID: 9739270
Date: 2017-08-22
CPC Classifications: F04B

Claim:
1. A linear compressor, comprising: a cylinder assembly defining a chamber; a piston received within the chamber of the cylinder assembly such that the piston is slidable along an axial direction within the chamber; a driving coil; an inner back iron assembly positioned in the driving coil, the inner back iron assembly having an outer surface, the driving coil is operable to move the inner back iron assembly along the axial direction during operation of the driving coil, the inner back iron assembly spaced apart from the cylinder assembly along the axial direction, the inner back iron assembly comprising an outer cylinder and a sleeve, the outer cylinder having an outer surface and an inner surface positioned opposite each other, the outer cylinder comprising a plurality of laminations distributed circumferentially about the sleeve, the sleeve mounted to the outer cylinder at the inner surface of the outer cylinder; a magnet mounted to the inner back iron assembly at the outer surface of the inner back iron assembly such that the magnet faces the driving coil, the magnet positioned in a recess defined by the laminations of the outer cylinder such that the magnet is inset within the outer cylinder; a compliant coupling extending between the inner back iron assembly and the piston; and a spring extending along the axial direction from the cylinder assembly to connect the cylinder assembly to the inner back iron assembly.