Patent ID: 6138459
Filing Date: 2000-10-31
Classification: F04B,F25B

Abstract:
A linear compressor for a regenerative refrigerator in which working fluid is compressed and expanded to generate refrigeration temperature, the linear compressor comprising:a compressor casing having a cylinder communicating with the regenerative refrigerator;a pair of pistons disposed in the cylinder for compressing and expanding the working fluid therein;a driving rod connected to each piston for driving the same and disposed in the compressor casing;first magnetic field generating means mounted on the driving rod; anda plurality of second magnetic field generating means fixedly positioned outside the compressor casing to face the first magnetic field generating means with a small gap therebetween, the plurality of the second field generating means being disposed laterally with one another along an axis of the driving rod, wherein:at least one of magnetic fields generated by the first and the second magnetic field generating means is a periodically alternating magnetic field; andthe driving rod is driven back and forth in its axial direction by magnetic force between the magnetic fields generated by the first and the second magnetic field generating means.