Moving coil type linear compressor of dual-coil structure

Abstract

The invention discloses a moving coil type linear compressor of a dual-coil structure. In the prior art, due to impact between a permanent magnet and a stator, demagnetization and motor efficiency reduction are caused. The linear compressor comprises a compressor assembly, a linear motor assembly, an alternating-current motor assembly, and plate spring assemblies. The compressor assembly comprisesa box body, a rack and an air cylinder, the linear motor assembly comprises a direct-current coil and a yoke, the yoke is arranged in an inner ring of the direct-current coil, the alternating-currentmotor assembly comprises an alternating-current coil and a supporting frame, the alternating-current coil is fixedly mounted on a cantilever of a supporting frame, the alternating-current coil is arranged on a gap between the direct-current coil and the yoke, the two plate spring assemblies are coaxial with a piston rod, one plate spring assembly is fixedly mounted on the other end of the pistonrod, and the other one plate spring assembly is mounted between the rack and the yoke. A stable magnetic field between the coils can be provided, the magnetic field strength between the coils can be improved, and the efficiency of the linear compressor can be obviously improved.

Description

technical field [0001] The invention belongs to the technical field of compressors, and relates to a moving-coil linear compressor, in particular to a moving-coil linear compressor adopting a double-coil structure. Background technique [0002] Linear compressors in cryogenic engineering provide dynamic pressure waves to cryocoolers that power the entire refrigeration cycle. The linear compressor sucks low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle. There are problems such as low motor efficiency in the compressor and slow response to load changes, which lead to a decrease in compressor efficiency, making the performance of the compressor in various fields more and more demanding on stability and work intensity. Aiming at these problems existing in trad...

AI Technical Summary

Problems solved by technology

[0004] In the working process of the existing linear compressor, first of all, when the compressor needs to run at a high load, the frequency of the piston movement can only be accelerated by changing the alternating current of the alternating current coil

Secondly, the existing linear compressors use permanent magnets, and the cost of the compressor is high

Finally, the existing linear compressors can only change the current of one set of coils, resulting in problems such as reduced motor efficiency, coil heating, and permanent magnet demagnetization

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