Resonant arrangement for a linear compressor

Abstract

A resonant arrangement for a linear compressor, comprising a non-resonant assembly formed by a motor and a cylinder (1); a resonant assembly formed by a piston (2) reciprocating inside the cylinder (1); an actuating means (3) operatively coupling the piston (2) to the motor, and at least one spring means presenting an elongated tubular body (50) which is coaxial to the axis of the piston (2) and is operatively coupled to the actuating means (3) and to the non-resonant assembly, said tubular body (50) having at least part of the extension therof folded in circumferential sectors (53), each circumferential sector (53) being elastically deformed in the axial direction upon displacement of the piston (2).

Description

FIELD OF THE INVENTION [0001] The present invention refers, in general, to a constructive arrangement for a resonant compressor of the type driven by a linear motor to be applied in refrigeration systems and which presents a piston reciprocating inside a cylinder. BACKGROUND OF THE INVENTION [0002] In a reciprocating compressor driven by a linear motor, the gas suction and gas compression operations are performed by the reciprocating axial movements of the piston inside a cylinder, which is closed by a cylinder head and mounted within a hermetic shell, in the cylinder head being positioned the suction and discharge valves that control the admission and discharge of the gas in relation to the cylinder. The piston is driven by an actuating means that supports magnetic components driven by a linear motor affixed to the shell of the compressor. [0003] In some constructions, the piston is mounted against a resonant spring means in the form of an assembly of flat springs, affixed to the h...

AI Technical Summary

Benefits of technology

[0010] Thus, it is an object of the present invention to provide a resonant system for a linear compressor, presenting an easy and reliable assembly and fixation, which allows said resonant system to be submitted to traction and compressive forces during operation of the compressor, without losing the positioning in relation to the parts to which it is affixed, and which does not present radial and lateral force components during the movement of the piston that may result in radial forces to the piston.

[0011] A further object of the present invention is to provide a resonant system of low cost and which dispenses the use of the flexible rod and of the flat or helical springs. SUMMARY OF THE INVENTION

Problems solved by technology

This construction presents some disadvantages, such as the need to have a flexible rod to neutralize the forces resulting from the errors occurred during production and assembly of the parts.

This flexible rod is also a relatively difficult component to be obtained, since it must be produced with special materials.

Furthermore, such flat springs are very expensive, as they require very sophisticated cutting and finishing processes.

This construction also presents disadvantages, such as requiring a compressor with larger dimensions, as a function of the need to use a pair of helical springs, which cannot be properly affixed to be submitted to traction forces.

Moreover, the helical springs have the characteristic of generating eccentric and shearing forces on the surfaces on which they are seated, provoking forces on the bearings of the piston of the compressor, generating noise and wear and reducing the life of the compressor.

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