Linear compressor

Abstract

A linear compressor comprises a cylinder 10, a piston 20, a cylinder end surface 11, a movable section 40 and a stationary section 50 that constitute a linear motor, coil springs 15, 30, a head cover 80, a support mechanism 90, a sealed container 100, etc. Defined in the cylinder 10 is a compression chamber 13 for gas compression. The spring member 61 of a spring mechanism member 60 is composed of coil springs 15, 30 having predetermined spring rigidity. When the coil spring 15 is compressed to the fullest extent, a clearance is secured between the end surface of the piston 20 and the cylinder end surface 11, whereby the amplitude of the piston 20 of the linear compressor can be controlled.

Description

technical field [0001] The invention relates to a linear compressor which uses a linear motor to drive a piston fitted inside a cylinder to reciprocate to compress gas. Background technique [0002] For the refrigeration cycle, HCFC-based refrigerants represented by R22 are considered to destroy the ozone layer due to the stability of their physical properties. In recent years, although HRC-based refrigerants have been adopted as a substitute for HCFC-based refrigerants, these refrigerants have a property of increasing global warming. Therefore, recently, HC-based refrigerants that do not have a large impact on the ozone layer and global warming have begun to be used. However, since the HC-based refrigerant is flammable, it is necessary to prevent explosion and fire in order to ensure safety, and therefore the usage of the refrigerant is required to be as small as possible. In addition, HC-based refrigerants themselves have no lubricity and have the property of being easil...

AI Technical Summary

Problems solved by technology

[0003] However, since the linear compressor is a free piston reciprocating push type, it is not constrained by other components in the mechanism, so under the action of various external forces such as pressure changes during operation and transportation, the piston will occur. Sudden changes in the amplitude and the impact of the end face of the piston on the end face of the cylinder may generate impact noise and damage the piston, etc.

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