HVAC Compressor Discharge Muffler with Perforated Plate
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Solution Overview
Problem
Existing discharge mufflers for compressors in HVAC&R systems effectively attenuate sound but often result in significant pressure drop, reducing system efficiency.
Innovation Solution
A discharge muffler design featuring a plate with perpendicular tubes arranged in a specific spacing to minimize pressure reduction while providing sound attenuation, utilizing a reflective plate and vanes to manage sound waves and improve flow characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dissipative or absorptive muffler systems are used to attenuate sound, then sound attenuation is improved, but discharge pressure reduction increases which reduces system efficiency
Solution Approach 1:
The muffler is divided into multiple chambers separated by perforated plates, with each chamber containing specific acoustic treatment elements. This segmentation allows different zones to handle different aspects of noise control while maintaining overall pressure characteristics
Solution Approach 2:
Perforated plates serve as intermediary elements between chambers, allowing acoustic energy to be attenuated while maintaining pressure equilibrium. The perforations provide a pathway for pressure equalization while the plate structure itself provides acoustic reflection and absorption
2Object-affected harmful factors
If restrictive muffler systems are used to subject refrigerant to a tortuous path, then sound attenuation is improved, but discharge pressure reduction increases which reduces system efficiency
Solution Approach 1:
The muffler utilizes multiple chambers arranged in series along the discharge path, creating a multi-dimensional flow path that attenuates sound through repeated reflections and absorptions rather than requiring a single long tortuous path
Solution Approach 2:
The continuous arrangement of chambers with perforated plates maintains continuous refrigerant flow while providing ongoing acoustic attenuation throughout the discharge path, avoiding interruptions or significant restrictions
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 achieves effective sound attenuation with minimal discharge pressure reduction, enhancing compressor efficiency and overall HVAC&R system performance.
Implementation Method 1
a plurality of tubes configured and disposed to extend through the plate substantially perpendicular to the plate, the plurality of tubes disposed in a predetermined spacing arrangement to provide substantially mutual axial alignment of the plurality of plates
Data Source
AI summary
A discharge muffler (20) in an HVAC&R system (100) includes a plurality of tubes (34, 38, 42) of predetermined length that are disposed at a predetermined spacing in substantially mutual axial alignment by a plate (30). The tubes (34, 38, 42) are secured adjacent to a compressor discharge (24) to minimize pressure reduction, improve flow characteristics and improve efficiency of the HVAC&R system (100).