Refrigerator Compressor Muffler Partitioned Cavity Noise Reduction
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Solution Overview
Problem
Existing refrigeration compressor mufflers are ineffective in reducing low frequency and medium-high frequency noise due to their simple structure, leading to residual gas jitter and noise generation during refrigerant transfer.
Innovation Solution
A muffler design featuring a housing with a partition member that isolates a resonant cavity from a muffling cavity, utilizing multiple partition plates to create resonant and muffling chambers, which effectively reduces noise across multiple frequency bands by allowing gas to pass through multiple muffling chambers and controlling the volume ratios of these chambers to optimize noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple muffling chamber structure is used, then ease of manufacture is improved, but noise reduction effectiveness deteriorates
Solution Approach 1:
The muffling chamber is segmented into multiple independent chambers (first, second, third muffling chambers) with different volume ratios, each targeting specific frequency ranges. This segmentation allows the system to reduce both low frequency and medium-high frequency noise simultaneously while maintaining a relatively simple overall structure that is easy to manufacture.
Solution Approach 2:
Different regions of the muffler are designed with different local characteristics - the first muffling chamber has a larger volume ratio for low frequency noise reduction, while the second and third chambers have smaller volume ratios for medium-high frequency noise reduction. This local differentiation optimizes noise reduction effectiveness across different frequency bands without requiring a completely complex overall structure.
2Device complexity
If a single muffling chamber is used, then device complexity is reduced, but noise reduction effectiveness deteriorates
Solution Approach 1:
The single muffling chamber is divided into three separate muffling chambers with different volume ratios. This segmentation enables the system to target different frequency ranges (low frequency for the first chamber, medium-high frequency for the second and third chambers) simultaneously, improving noise reduction effectiveness without significantly increasing device complexity.
Solution Approach 2:
The patent introduces a new dimension of design by varying the volume ratios of different muffling chambers rather than using a uniform structure. This dimensional change allows the system to address multiple frequency ranges effectively while maintaining a compact and relatively simple overall device structure.
3Device complexity
If the resonant cavity and muffling cavity are not isolated, then device complexity is reduced, but noise reduction effectiveness deteriorates
Solution Approach 1:
The internal cavity is segmented into distinct resonant and muffling regions using partition members. This segmentation creates isolated functional zones where the resonant cavity handles low frequency noise through resonance effects, while the muffling chambers handle medium-high frequency noise through absorption and reflection, thereby improving overall noise reduction effectiveness without significantly increasing device complexity.
Solution Approach 2:
Partition members serve as intermediary structures that separate the resonant cavity from the muffling chambers. These partition members enable independent optimization of each cavity's function while maintaining a compact integrated structure, improving noise reduction effectiveness without requiring a completely complex multi-component design.
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 design simultaneously reduces low frequency and medium-high frequency noise by reflecting low frequency noise in the resonant cavity and attenuating medium-high frequency noise through the muffling cavity, resulting in improved noise reduction across a broader frequency range.
Implementation Method 1
The resonant cavity is in communication only with the gas inlet... reflecting low frequency noise in the resonant cavity
Implementation Method 2
the muffling cavity is in communication with both the gas inlet and the gas outlet... attenuating medium-high frequency noise through the muffling cavity
Data Source
AI summary
A muffler includes a housing and a partition member. The housing includes a cavity, a gas inlet, and a gas outlet. The gas inlet and the gas outlet are respectively in communication with the cavity. The partition member is disposed in the housing. The partition member partitions the cavity into a resonant cavity and a muffling cavity that are isolated from each other. The resonant cavity is in communication only with the gas inlet. The muffling cavity is in communication with both the gas inlet and the gas outlet.