Compressor Discharge Muffler Pulsation Reduction

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Solution Overview

Problem

Conventional discharge mufflers in compressors face challenges in reducing pulsation and noise due to limited space, which hinders their effectiveness in mitigating pressure variations and noise reduction.

Innovation Solution

A discharge muffler configuration with at least one discharge space in the cylinder block and a pulsation reducing member with a passage on its circumferential surface that guides the working fluid flow, elongating and bending the path to reduce pulsation and noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the discharge muffler volume is increased to reduce pulsation, then pulsation reducing performance is improved, but the available space in the compressor is limited making it difficult to increase the volume

Engineering Contradiction:

Improvepulsation reducing performanceVSAvoiddischarge muffler volume

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The pulsation reducing member is nested within the discharge muffler, with the member having a passage that guides working fluid through its circumferential surface. This nested configuration allows the pulsation reducing member to be integrated into the limited space of the discharge muffler, effectively increasing the flow path length without increasing the overall muffler volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The passage in the pulsation reducing member extends in the circumferential direction, utilizing the radial dimension of the discharge space. By guiding the working fluid through a circumferential path rather than a simple linear path, the effective flow distance is increased without requiring additional axial or radial space in the compressor.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Object-affected harmful factors

If the flow path length is increased to reduce noise, then noise reduction performance is improved, but the compressor space is limited

Engineering Contradiction:

ImprovenoiseVSAvoidflow path length

Core Design Contradiction:

Object-affected harmful factorsVSLength of stationary object

Solution Approach 1:

The passage in the pulsation reducing member features a curved circumferential path that guides the working fluid around the member. This curved path increases the flow distance compared to a straight path, effectively lengthening the noise reduction path without requiring additional linear space in the compressor structure.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Reliability

If a simple discharge space configuration is used, then device complexity is reduced, but pulsation reducing performance is insufficient

Engineering Contradiction:

Improvepulsation reducing performanceVSAvoiddischarge muffler structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The discharge muffler is segmented into a discharge space and a pulsation reducing member with a passage. This segmentation allows the pulsation reducing member to be a separate component that can be installed within the discharge space, providing enhanced pulsation reduction functionality without significantly complicating the overall discharge muffler structure.

Inventive Principle:

Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The proposed solution effectively reduces pulsation and noise by increasing the flow distance and path length of the working fluid, enhancing noise reduction performance in compressors despite limited space constraints.

Implementation Method 1

a pulsation reducing member engaged in the discharge space having a passage, on a circumferential surface, configured to guide the flow of the working fluid to an inner space of the discharge space

Methodology Applied

Scientific EffectFlow path elongation and bending:

Implementation Method 2

The discharge muffler may mitigate the gas pressure, thus reducing the noise by expanding the gas refrigerant or extending the flow path of the gas refrigerant

Methodology Applied

Scientific EffectGas expansion:

Data Source

PatentUS9903356B2Compressor and discharging muffler thereof

Publication Date: 2018.02.27 DONGBU DAEWOO ELECTRONCIS CORP

AI summary

A discharge muffler may include a discharge space in the cylinder block and a pulsation and/or noise reducing member (e.g., a pulsation reducing member) engaged in the discharge space having a passage (e.g., a pulsation and/or noise reducing passage) on a circumferential surface configured to guide the working fluid to an inner space of the discharge space.