Compressor With Muffler

The compressor assembly with a gravity-biased valve assembly in the muffler addresses the backflow issue in direct discharge refrigerant compressors, preventing noise and motor damage by managing pressure pulses and ensuring proper refrigerant flow, thus enhancing the compressor's operational reliability and noise reduction.

US20090116977A1Inactive Publication Date: 2009-05-07EMERSON CLIMATE TECHNOLOGIES INC
45 Cites 7 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
EMERSON CLIMATE TECHNOLOGIES INC
Filing Date
2008-10-28
Publication Date
2009-05-07
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Direct discharge refrigerant compressors face issues with backflow during shutdown, leading to noise and potential motor damage due to the reversal of refrigerant flow from the high-pressure discharge fitting into the compression mechanism, which is not effectively prevented by existing external mufflers.

Method used

A compressor assembly with an external muffler and a valve assembly that moves between closed and open positions based on flow direction, preventing backflow from the outlet to the inlet and allowing flow from the inlet to the outlet, and is biased to an open position by gravity, ensuring the muffler's design effectively manages pressure pulses and noise reduction.

Benefits of technology

The solution effectively prevents backflow, reducing noise and motor damage by ensuring the refrigerant flows correctly, maintaining the compressor's operational integrity and reducing noise through the efficient design of the muffler and valve assembly.

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Abstract

A compressor assembly may include a shell, a discharge fitting, a muffler, a compression mechanism, and a motor. The shell may have an opening therethrough with the discharge fitting generally extending therefrom. The muffler may be in communication with the discharge fitting and may be external to the shell. The muffler may have an inlet proximate the discharge fitting, an outlet distal from the discharge fitting, and a body portion extending therebetween. The muffler may include a valve assembly proximate the outlet. The compression mechanism may be contained within the shell and include a suction inlet and a discharge passageway. The discharge passageway may be connected to the opening in the shell for direct discharge of refrigerant from the compression mechanism to the discharge fitting. The motor may be contained within the shell and drivingly coupled to the compression mechanism.
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Citation Information

Patent Citations

  • Motor compressor unit

    US1910498A

  • Assembling mechanism of discharge pipe for hermetic compressor and method thereof

    US20040096338A1

  • Compressor and overload protecting apparatus

    US20050063828A1

  • Overheating protection apparatus of scroll compressor

    US20050135940A1

  • Discharge gas check valve integral with muffler

    US20060048996A1

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