Compressor Muffler with Segmented Chambers and Communicating Holes

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Solution Overview

Problem

Direct suction type mufflers for compressors face limitations in noise reduction due to increased refrigerant suction, while indirect communication methods can improve noise reduction but result in refrigerant suction loss.

Innovation Solution

A muffler design with multiple chambers and strategically placed communicating holes between the inlet and outlet, along with a communicating pipe, to minimize refrigerant suction loss and pressure pulsation, enhancing cooling capability and noise reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the inlet and outlet of the suction muffler are directly communicated with each other via a pipe, then the refrigerant suction amount increases, but the noise reduction effect is limited

Engineering Contradiction:

Improverefrigerant suction amountVSAvoidnoise

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The suction muffler is divided into multiple chambers (first chamber, second chamber, third chamber) separated by partition walls. This segmentation allows the refrigerant flow path to be divided into multiple segments, enabling both sufficient refrigerant suction and effective noise reduction by controlling pressure pulsation in each chamber independently.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If a chamber is formed between the inlet and outlet to make them indirectly communicated, then the noise reduction effect is improved, but refrigerant suction loss occurs

Engineering Contradiction:

ImprovenoiseVSAvoidrefrigerant suction amount

Core Design Contradiction:

Object-affected harmful factorsVSQuantity of substance

Solution Approach 1:

Communicating holes are formed in the partition walls between chambers to serve as intermediaries for refrigerant flow. These communicating holes allow the refrigerant to pass through the chambers indirectly while maintaining flow efficiency, thus achieving both noise reduction and sufficient refrigerant suction.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of energy

If multiple chambers are formed with communicating holes, then refrigerant suction loss and pressure pulsation are reduced, but the device complexity increases

Engineering Contradiction:

Improverefrigerant suction lossVSAvoidmuffler structure

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

Multiple chambers are merged into a single integrated muffler structure with partition walls and communicating holes. This combining approach achieves the benefits of multiple chambers for reducing suction loss and pressure pulsation while maintaining a compact, unified structure that does not excessively increase device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP2265821B1Muffler for compressor

Publication Date: 2016.08.17 LG ELECTRONICS INC

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AI summary

Disclosed is a muffler for a compressor, which has a chamber between an inlet and an outlet and also appropriately designs a size of a communicating pipe for indirectly connecting the inlet to the outlet as well as a size of a noise space, whereby a suction loss of a refrigerant sucked into the muffler for the compressor can be reduced and also pressure pulsation can be reduced so as to enhance a cooling capability of the compressor and a noise reduction effect. Also, an assembling structure of the muffler can be simplified, resulting in reduction of fabricating cost and improvement of productivity.