Linear compressor

Abstract

The invention relates to a linear compressor. An arrangement structure for permanent magnets is changed, so the fixing of the permanent magnets is more firm. The compressor comprises an air cylinder, a piston, an inner stator, an outer stator and the permanent magnets, wherein the inside of the air cylinder is provided with a refrigerant compressing space; one end of the piston is inserted into the air cylinder, and the piston compresses a refrigerant through linear reciprocating motion; the cylindrical inner stator is arranged at the periphery of the air cylinder and is fixed axially; the cylindrical outer stator is arranged on the inner side of the inner stator, has a certain space with the inner stator in the radial direction, and is fixed axially; the permanent magnets are arranged in the radial space between the inner and outer stators and perform axial linear reciprocating motion under the mutual electromagnetic action between the inner and outer stators; and the compressor also comprises a connecting part which is connected with the other end of the piston, is provided with a plurality of permanent magnet mounting holes and has the thickness slightly less than the radial thickness of the permanent magnets.

Description

Technical field: [0001] The present invention relates to a linear compressor, in particular to the linear compressor of the present invention. By improving the arrangement structure of the permanent magnets, the fixing of the permanent magnets is further tightened. Background technique: [0002] Generally speaking, a reciprocating compressor forms a compression space between the piston and the cylinder for sucking and discharging working air, and the piston compresses the refrigerant while doing linear reciprocating motion inside the cylinder. [0003] Recently, the reciprocating compressor converts the rotational force of the drive motor into the linearly reciprocating power of the piston, and since it includes components similar to a crankshaft and the like, a large loss of mechanical energy is caused during the motion conversion process. To solve this problem, linear compressors are continuously improved. [0004] This kind of linear compressor, especially the linear rec...

AI Technical Summary

Problems solved by technology

[0012] However, in the traditional linear compressor, after the connection part is injection molded into a barrel shape, the permanent magnet is set on the circumference of the connection part and fixed by epoxy resin fibers, which is prone to the phenomenon of permanent magnet sliding

In addition, the epoxy resin fiber shrinks due to heat deformation, etc., which changes the installation position of the permanent magnet, thereby reducing the performance of the linear motor

In addition, even if the traditional linear compressor inserts or injects permanent magnets into the connecting parts for fixing, it is very difficult to fix the permanent magnets firmly on the connecting parts in terms of structure. Due to thermal deformation of the connecting parts and other reasons, the expansion of the permanent magnets It is easy to fall off the connecting parts, so that the reliability of operation is greatly reduced

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