Oil Separator Muffling Structure for Compressor Pulsation Noise
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Solution Overview
Problem
Oil separators in refrigeration systems generate high noise levels due to pressure waves and pulsations from compressors, which existing noise reduction solutions often fail to address effectively without increasing system size or incurring additional costs.
Innovation Solution
A muffling apparatus with an internal layer of absorbing material, such as fiberglass, is placed within the oil separator to attenuate pressure waves by dissipating their energy into heat, reducing vibrations and noise levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If noise reduction equipment is placed between the oil separator and compressor, then noise levels are reduced, but the system occupies a larger overall footprint and is subjected to high pressure differentials requiring strict design rules and certifications
Solution Approach 1:
The muffling apparatus is integrated within the oil separator housing, combining the noise reduction function with the existing oil separator structure. This eliminates the need for separate external noise reduction equipment, reducing overall system footprint while avoiding exposure to high pressure differentials between compressor discharge and atmosphere
Solution Approach 2:
The muffling apparatus is nested within the internal volume of the oil separator, utilizing the existing space efficiently. The apparatus fits inside the oil separator housing without requiring additional external space, thereby reducing the overall system footprint while maintaining noise reduction functionality
2Object-affected harmful factors
If traditional noise reduction equipment is used, then noise levels are reduced, but additional costs are incurred due to strict design rules and certifications required for pressure vessel applications
Solution Approach 1:
By integrating the muffling apparatus within the oil separator housing rather than using separate external equipment, the invention avoids the need for additional pressure vessel certifications and design rules. The apparatus operates within the existing oil separator pressure environment, eliminating the need for separate certification processes and reducing manufacturing costs
3Reliability
If the oil separator acts as a resonant cavity, then pressure waves from the compressor are amplified, but this causes high vibration levels and excessive noise output
Solution Approach 1:
The invention converts the harmful pressure waves and pulsations into beneficial thermal energy through the absorbing material. The pressure wave energy that would normally cause vibrations and noise is instead dissipated as heat within the muffling apparatus, transforming a harmful effect into a beneficial one
Solution Approach 2:
The absorbing material changes the physical parameters of the pressure waves by converting acoustic energy into thermal energy. This parameter transformation from mechanical wave energy to heat energy reduces the vibration and noise levels while maintaining the pressure containment function of the oil separator
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 muffling apparatus effectively reduces noise levels by up to 15 dB across various frequency bands, minimizing system footprint and avoiding exposure to high pressure differentials, thus providing a cost-effective and space-efficient solution.
Implementation Method 1
The absorbing material is effective to attenuate the energy of pressure waves/pulsations from the compressor into heat
Implementation Method 2
The absorbing material is effective to attenuate the energy of pressure waves/pulsations from the compressor into heat
Data Source
AI summary
A muffling apparatus (100) is provided for placement within an oil separator of refrigeration or cooling system, wherein the apparatus has a non-straight shape and a lumen (160) defined therein to allow for noise-creating pressure pulsations/waves to come into contact with absorbing material (110) of the muffling apparatus in order to attenuate the energy of the pressure waves/pulsations into heat and thus reduce oil separator vibrations caused thereby.