Reciprocating Compressor Suction Muffler Partition Wall Resonance

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Solution Overview

Problem

Reciprocating compressors generate noise in specific frequency bands, particularly in the cavity resonant frequency band, which can increase overall noise levels in electric appliances and affect their reliability, especially in small-sized products like water purifiers.

Innovation Solution

A reciprocating compressor design incorporating a muffler assembly with a partition wall dividing the suction muffler into a resonance chamber and a cavity chamber, featuring a guide pipe with a resonance hole to reduce noise, and a support structure for stable assembly and noise reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a conventional suction muffler is used without internal partitioning, then the structure is simple and easy to manufacture, but noise in the cavity resonant frequency band cannot be reduced

Engineering Contradiction:

Improvenoise in cavity resonant frequency bandVSAvoidstructure of suction muffler

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The suction muffler is divided into a resonance chamber and a cavity chamber by a partition wall. This segmentation allows the resonance chamber to specifically address noise in the cavity resonant frequency band while maintaining overall structural organization. The partition wall creates distinct functional zones for noise reduction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A guide pipe is introduced as an intermediary component connecting the resonance chamber to the cavity chamber. The guide pipe includes a resonance hole that mediates the noise reduction process by allowing controlled interaction between the two chambers, enabling the resonance chamber to effectively reduce noise while maintaining fluid communication.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If a partition wall is added to divide the suction muffler into two spaces, then noise reduction effectiveness improves, but assembly complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvenoise intensityVSAvoidassembly process

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The partition wall is designed as a separate component that can be independently manufactured and then assembled into the suction muffler. This segmentation of the manufacturing process allows for simplified production of individual parts while achieving complex noise reduction functionality when assembled.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The guide pipe serves as an intermediary assembly component that facilitates the connection between the resonance chamber and cavity chamber. It provides a structured interface for assembling the partition wall and other components, simplifying the overall assembly process while maintaining noise reduction effectiveness.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the guide pipe is freely positioned without support structure, then assembly is easier, but the guide pipe cannot be stably supported during refrigerant suction

Engineering Contradiction:

Improveassembly processVSAvoidposition of guide pipe

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

A support structure is introduced as an intermediary element that provides stable positioning for the guide pipe. This support structure acts as a mediator between the guide pipe and the suction muffler body, ensuring the guide pipe remains firmly positioned during operation while allowing for straightforward assembly.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 solution effectively reduces noise in the specific frequency band, enhancing the reliability of small-sized appliances by minimizing noise levels, as demonstrated by experimental graphs showing a decrease in noise intensity.

Implementation Method 1

the cavity may be defined inside the housing shell of the compressor... generate noise in a specific band, particularly, in a cavity resonant frequency band of the refrigerant

Methodology Applied

Scientific EffectAcoustic resonance: Resonance

Implementation Method 2

a muffler assembly having a resonance chamber... a partition wall that partitions an inside of a suction muffler into two spaces... reduce noise in the cavity resonant frequency band

Methodology Applied

Scientific EffectAcoustic damping: Damping

Implementation Method 3

a guide pipe that communicates with a suction hole of a suction muffler and that is disposed at a partition wall to guide a refrigerant from a first space to a second space... a through-hole (resonance hole) that is defined in a guide pipe to reduce noise

Methodology Applied

Scientific EffectAcoustic resonance: Resonance

Data Source

PatentUS12196198B2Reciprocating compressor

Publication Date: 2025.01.14 LG ELECTRONICS INC

AI summary

A reciprocating compressor includes a suction muffler including a partition wall that partitions an inner space of the suction muffler into multiple spaces. The suction muffler further includes a guide pipe that is provided at the partition wall and that defines a resonance hole configured to reduce noise in a specific band.