Linear Compressor Muffler Ribs for Compact Noise Reduction
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Solution Overview
Problem
Linear compressors face challenges with noise reduction and rigidity issues in their muffler units, particularly in gas lubricated compressors, which can lead to reduced reliability and efficiency due to limited space and noise reduction effectiveness.
Innovation Solution
The linear compressor incorporates a second muffler unit with ribs protruding from its intake muffler and body to enhance rigidity and noise reduction, guiding the coupling direction and position of components without affecting refrigerant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a muffler unit is coupled to the piston in a linear compressor, then noise reduction is achieved, but the noise reduction effect is lowered due to limited space
Solution Approach 1:
The patent implements a nested muffler structure where an inner muffler is positioned inside an outer muffler, creating multiple noise reduction chambers within a compact volume. This nested configuration allows the muffler unit to achieve effective noise reduction while occupying minimal space within the compressor, directly resolving the contradiction between noise reduction performance and space limitation
Solution Approach 2:
The patent utilizes the axial dimension by extending the muffler unit along the piston's reciprocating axis, rather than only expanding radially. This dimensional approach allows noise reduction functionality to be achieved within the limited radial space by exploiting the available axial length, effectively addressing the space constraint while maintaining noise reduction capability
2Ease of manufacture
If the muffler unit structure is simplified, then manufacturing is easier, but rigidity of the muffler unit is reduced
Solution Approach 1:
The muffler unit is divided into distinct segments including an inner muffler, outer muffler, and connecting ribs, allowing each component to be manufactured separately using simple processes and then assembled. This segmentation maintains manufacturing simplicity while the interconnected rib structure provides the necessary rigidity when components are assembled together
Solution Approach 2:
The muffler unit employs a composite structure combining multiple materials with different properties - the inner and outer mufflers may use different materials optimized for their specific functions, while the connecting ribs provide structural reinforcement. This composite approach enables both ease of manufacture through material selection and sufficient rigidity through structural design
Data Source
AI summary
A linear compressor includes a cylinder, a piston configured to axially reciprocate in the cylinder, a first muffler unit coupled to the piston, a back cover that is disposed at a rear of the piston and defines an opening in a radially central area thereof, and a second muffler unit coupled to the opening. The first muffler unit includes an inner guide disposed in the piston and a first intake muffler disposed at a rear of the inner guide. The second muffler unit includes a second intake muffler that is in fluid communication with the first intake muffler and coupled to the opening, and a muffler body surrounding the second intake muffler. The second muffler unit further includes a rib protruding from an outer surface or an inner surface of the second intake muffler.