System for attenuating pulsation in the gas discharge of a refrigeration compressor

Abstract

The attenuation system is applied to a compressor which comprises: a cylinder (2) having an end closed by a valve plate (4) provided with a discharge orifice (4a) and defining, with the cylinder (2), a compression chamber (6), a cylinder cover (5) being seated against the valve plate (4) and defining a discharge chamber (7), which communicates with the exterior of the compressor through a discharge tube (8). The attenuation system comprises: at least one intermediary chamber (10) defined in the interior of the discharge chamber (7), in order to receive, from the discharge orifice (4a), the whole discharge flow coming from the compression chamber (6); and at least one 4a connecting tube (20) mounted in the interior 4b of the discharge chamber (7), having a first end (21) open to the interior of the intermediary chamber (10) and a second end (22) open to the interior of the discharge chamber (7).

Description

FIELD OF THE INVENTION[0001]The present invention refers to an attenuating pulsation system to be applied in the gas discharge of a refrigeration compressor, for example of the reciprocating hermetic type and generally driven by a linear motor.BACKGROUND OF THE INVENTION[0002]Refrigeration compressors are generally provided with pulsation attenuators or acoustic filters provided in the gas discharge. Such attenuators have the purpose of attenuating the pulsation of the gases which are pumped from the compressor to the refrigeration system to which said compressors are generally coupled or, in the generic case, to the high-pressure side of the refrigeration circuit to which the compressor belongs, as well as reducing the noise irradiated by the compressor to the external ambient. The pulsation of the gases generates an excitation in the ducts and components to which the discharge of the compressor is coupled, which in turn generates noise.[0003]The attenuation of pulsations in the ga...

AI Technical Summary

Benefits of technology

[0005]It is a generic object of the present invention to provide a system for attenuating pulsation in the gas discharge of a refrigeration compressor, particularly of small dimensions, which enables attenuating discharge pulsations and noise, without presenting the load loss of the conventional constructions.

[0006]Another object of the present invention is to provide a system for attenuating pulsations and noise, as cited above, which is easily constructed and mounted, mainly in a compressor without a massive block, particularly of the linear type.

Problems solved by technology

The pulsation of the gases generates an excitation in the ducts and components to which the discharge of the compressor is coupled, which in turn generates noise.

Although this discharge system solution presenting a configuration of volumes “in series” results in greater attenuation, it has the disadvantage of producing a higher load loss.

This solution further presents the disadvantage of requiring large dimensions for the cylinder block to allow machining the volumes and discharge tubes.

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