Comprehensive bias suppression structure and method for linear compressor

Abstract

The invention discloses a comprehensive bias suppression structure and method for a linear compressor. The comprehensive bias suppression structure is composed of a compressor, a displacement sensor, a supporting spring mechanism, a direct-current power source and an external bypass electromagnetic valve. A supporting spring mechanism increases the overall spring rigidity, and piston offset is effectively reduced; the direct-current power source adds a direct-current component to change motor thrust borne by the piston and counteract pressure difference force on the two sides of a piston so as to reduce offset of the piston; and an external bypass electromagnetic valve communicates a backpressure cavity of the linear compressor with an air inlet of a compression cavity, the electromagnetic valve controls connection and disconnection of an air channel to supplement air for compression, the pressure difference of the two sides of the piston is reduced, and piston offset is reduced. By means of the mode, comprehensive suppression of the offset of the linear compressor is achieved, the offset size of the compressor piston is reduced, and the overall efficiency of the compressor is improved.

Description

technical field [0001] The invention belongs to the field of refrigeration linear compressors, and in particular relates to a linear compressor offset comprehensive suppression structure and method. Background technique [0002] Compared with conventional reciprocating compressors, linear compressors use linear motors to drive pistons, eliminating the need for crank linkages, reducing the number of mechanisms and additional friction loss caused by mechanisms; linear compressors use leaf spring support technology and oil-free The gap sealing technology can meet the space application conditions; the stroke of the piston is jointly affected by the driving voltage and the gas force on the piston. [0003] Piston offset is the phenomenon that when the piston is moving, its mechanical balance position deviates from the "zero" position. The generation of piston bias will make the support plate spring bear additional deformation, resulting in the superposition of stress, thus affec...

AI Technical Summary

Problems solved by technology

The generation of piston bias will make the support plate spring bear additional deformation, resulting in the superposition of stress, thus affecting the fatigue limit and life of the plate spring; at the same time, the effective stroke of the piston will be sharply reduced, and finally the suction volume will be reduced. Decrease in DC flow, increase in low pressure, decrease in pressure ratio, decrease in volumetric efficiency and other adverse effects; it will also increase the instability of motion and increase the risk of collision between the piston and the limit, thereby further affecting the service life of the compressor

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