Linear compressor

摘要

A linear compressor can prevent leakage of a magnetic force by changing the construction of a linear motor. As the construction of the linear motor is changed, a mechanical spring constant is set smaller in consideration of a magnetic spring constant, so that the size of springs supporting a piston in the reciprocal linear motion direction can be reduced and components supporting the springs can be removed. Therefore, the linear compressor achieves a small size/a light weight. With the characteristics of the linear motor construction, the linear compressor can suppress a stroke spreading influence and easily expand a compression capacity according to a load.

主权项

1. A linear compressor, comprising:
a fixed member including a cylinder having a compression space defined therein, an inner stator installed at an outside of the cylinder, and an outer stator that contacts the inner stator at a first side and forms a pole in an air gap with the inner stator at a second side, wherein the outer stator is provided with a connection portion, in contact with an axial end surface of the inner stator which faces away from the air gap at a first axial end, at the first side and the pole is maintained in the air gap with a second axial end of the inner stator at the second side; and a moving member including a piston that performs a reciprocal linear motion in the compression space of the cylinder and compresses an operating fluid introduced into the compression space, and at least one permanent magnet that performs the reciprocal linear motion with the piston due to a mutual electromagnetic force in the air gap between the inner stator and the outer stator, wherein the at least one permanent magnet includes a plurality of permanent magnets arranged along a direction of the reciprocal linear motion, and wherein N and S poles of each of the plurality of permanent magnets are formed opposite to the inner stator and the outer stator, and wherein at least one of the plurality of permanent magnets completely escapes from the air gap between the inner stator and the outer stator, during an operation of the linear compressor.