Acoustic Filter Resonator Chamber Design
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Solution Overview
Problem
Existing acoustic filters for compressors in cooling systems of household appliances face a trade-off between good acoustic and thermodynamic performance, with most solutions either reducing noise at the expense of thermodynamic efficiency or vice versa, due to complex designs and increased material usage.
Innovation Solution
The proposed acoustic filter features a simpler design with larger duct diameters and an adjacent resonator chamber to improve thermodynamic performance while maintaining effective noise attenuation, achieved through a configuration of main and secondary chambers with partition walls and strategically positioned resonator tubes for fluid flow and oil drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the filter has good performance in pulse attenuation, then the acoustic performance is improved, but the thermodynamic performance is relatively reduced
Solution Approach 1:
The filter body is divided into multiple chambers (first chamber, second chamber, third chamber) separated by partition walls, with each chamber serving specific acoustic functions while maintaining fluid flow paths that preserve thermodynamic performance
Solution Approach 2:
The resonator chamber is positioned adjacent to the inlet duct in a spatial arrangement that allows acoustic resonance without obstructing the main fluid flow path, resolving the conflict between noise attenuation and thermodynamic efficiency
2Object-generated harmful factors
If the filter follows conventional designs with sinuous paths and multiple resonance chambers, then the acoustic performance is improved, but the device complexity and material usage increase
Solution Approach 1:
The design extracts only the essential acoustic resonance function through a single resonator chamber adjacent to the inlet duct, eliminating unnecessary sinuous paths and multiple resonance chambers while maintaining effective noise attenuation
Solution Approach 2:
Instead of forcing fluid through complex sinuous paths to achieve acoustic effects, the invention uses a straightforward fluid path combined with an adjacent resonator chamber that achieves noise attenuation without compromising flow efficiency or increasing complexity
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
This design enhances both acoustic and thermodynamic performance by allowing larger duct diameters and efficient fluid flow, reducing noise while minimizing material usage and complexity, thus offering a more efficient and cost-effective solution compared to existing filters.
Implementation Method 1
the acoustic effect of the filter is obtained by the various geometric configurations that said device may have. Thus, according to the geometric configuration chosen or projected, the pulses of the pressures may be attenuated by the effect of passive cancellation
Data Source
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AI summary
The present invention belongs to the technological field of the reduction of noise produced by hermetic compressors, such as those used in cooling systems of household appliances. The acoustic filter (1) of the present invention comprises an inlet duct (2), an outlet duct (3) and at least one main chamber (4A), wherein the inlet duct (2) comprises a refrigerant fluid inlet (5) and a refrigerant fluid delivery end (6), wherein the refrigerant fluid delivery end (6) is opposite to said refrigerant fluid inlet (5) and it is capable of guiding the refrigerant fluid to the main chamber (4A); the outlet duct (3) comprises a refrigerant fluid outlet (7) and a refrigerant fluid collection end (8), wherein the refrigerant fluid collection end (8) is opposite to said a refrigerant fluid outlet (7) and it is capable of guiding the refrigerant fluid from the main chamber (4A) to said fluid outlet (7). The filter (1) comprises a resonator chamber (9) arranged adjacent to the inlet duct (2) and adjacent to the main chamber (4A), wherein the resonator chamber (9) and the inlet duct (2) are fluidically connected by means of at least one resonator tube (10A, 10B, 10C) and the resonator chamber (9) is separated from the main chamber (4A) by means of a sealing wall (11).