Compressor Intake Muffler Inertia Filter Noise Reduction

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Solution Overview

Problem

Existing compressors generate high noise levels during operation, which is annoying and distracting, and they also suffer from inefficient cooling designs, leading to heat and ventilation issues.

Innovation Solution

A compressor assembly with a muffler system that includes an inertia filter and a muffler chamber, designed to reduce noise levels by filtering particles and directing sound waves through a chamber that attenuates noise, while also improving cooling efficiency through optimized air flow paths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a muffler system with inertia filter is used to reduce noise, then noise levels are reduced to 60-75 dBA, but device complexity increases due to additional components

Engineering Contradiction:
Improvenoise levelsVSAvoidmuffler system complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent combines the inertia filter and muffler chamber into a single integrated assembly that attaches to the compressor housing. The filter element and muffler chamber are merged into one component structure, allowing simultaneous noise reduction and particle filtration without requiring separate devices. This integration reduces overall system complexity compared to using independent noise control and filtration systems.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The muffler system serves multiple functions simultaneously: it filters particles from the air stream through the inertia filter element, attenuates noise through the muffler chamber, and maintains a clean feed path to the compressor. This multi-functionality allows a single device to address both noise control and air filtration requirements, reducing the need for additional separate components.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If filter media is used to clean the feed path, then component lifespan is extended, but device complexity and maintenance requirements increase

Engineering Contradiction:
Improvecomponent lifespanVSAvoidfilter system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces traditional filter media (such as paper or fabric filters) with an inertia-based filtration system. Instead of using porous materials that can clog and require replacement, the system uses the inertial force of particles to separate them from the air stream through strategic directional changes in the airflow path. This mechanical/inertial approach eliminates the need for consumable filter media, reducing complexity and maintenance requirements while maintaining reliable particle separation.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Temperature

If cooling air flow paths are optimized, then cooling efficiency is enhanced, but device complexity increases due to additional ducting and routing

Engineering Contradiction:
Improvecooling efficiencyVSAvoidair flow path complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The patent integrates cooling air flow paths with the existing muffler system housing and compressor assembly structure. The cooling ducts are merged into the muffler chamber walls and housing features, allowing cooling air to be directed through the same structural elements that provide noise attenuation. This integration eliminates the need for separate, independent cooling ducting systems, reducing overall complexity while maintaining effective cooling.

Inventive Principle:
Principle #5Merging (Combining)

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 levels to a range of 60-75 dBA, enhances cooling efficiency, and extends the lifespan of compressor components by maintaining a clean feed path without the need for filter media.

Implementation Method 1

an inertia filter adapted to filter particles from the feed air

Methodology Applied
Scientific EffectInertial force: Inertia

Implementation Method 2

a muffler chamber adapted to receive the feed air from the inertia filter and to provide the compressed air from the pump assembly

Methodology Applied
Scientific EffectAcoustic absorption: Acoustic Absorption

Implementation Method 3

designed to reduce noise levels by filtering particles and directing sound waves through a chamber that attenuates noise

Methodology Applied
Scientific EffectSound wave attenuation: Damping

Data Source

PatentUS12270389B2Compressor intake muffler and filter
Publication Date: 2025.04.08 BLACK & DECKER CORP
  • US12270389B2 patent drawing
  • US12270389B2 patent drawing
  • US12270389B2 patent drawing

AI summary

A compressor assembly having a high velocity muffler system which produces a particle-free compressor pump feed while reducing noise output from the compressor assembly during compressing operations. The high velocity muffler system is maintenance-free and comprises an inertia filter. The compressor assembly uses a method for producing a compressor pump feed and reducing noise during compressing operations by processing a gas through the high velocity muffler system which has an inertia filter and a muffler chamber to produce a compressor pump feed which can be compressed by a pump assembly.