Linear Compressor Spring Mechanism to Prevent Deformation and Noise
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Solution Overview
Problem
In linear compressors, the deformation of spring supports leads to interference with peripheral constituents, causing the piston to resonate improperly and generate noise, as the first and second main springs are not fixed in position due to coupling deformation.
Innovation Solution
A linear compressor design where the spring device includes a support with insertion holes, a first coupling protrusion on the rear surface, and a support cap with a second coupling protrusion, allowing the first and second resonant springs to be fitted on both sides of the spring supports in a line, preventing deformation and maintaining the springs' position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spring support, back cover, and core cover are coupled to peripheral constituents, then the structure is assembled, but coupling deformation occurs causing the springs to be unsupported in fixed positions
Solution Approach 1:
A support cap is introduced as an intermediary component between the spring support and the back cover. The support cap includes a cap body that fits into the back cover and a cap protrusion that engages with the spring support, mediating the connection to prevent deformation and maintain precise spring positioning during assembly
Solution Approach 2:
The support cap is pre-assembled with the spring support through the support insertion hole before final assembly with the back cover. This preliminary action ensures the spring support is properly positioned and deformed springs are restored before the complete assembly is finalized
2Device complexity
If the first main spring and second main spring are supported by the spring support, back cover, and core cover, then the structure is complete, but the springs interfere with peripheral constituents due to deformation
Solution Approach 1:
The support cap acts as a mediator that isolates the spring support from deformation caused by the back cover and core cover coupling. This intermediary structure prevents the springs from being displaced and interfering with peripheral constituents
3Ease of manufacture
If the spring support deforms while supporting the springs, then the coupling is formed, but the piston cannot resonate properly generating noise
Solution Approach 1:
The support cap provides a rigid, pre-formed structure that cushions and protects the spring support from deformation during assembly. This beforehand cushioning ensures the spring support maintains its shape and the piston can resonate properly without noise
Solution Approach 2:
The support cap mediates between the coupling formation process and the spring support, absorbing deformation stresses and protecting the spring support from distortion that would affect piston resonance
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 configuration ensures that the springs are supported on both surfaces of the spring support, preventing deformation and maintaining the support cap's coupling, which reduces noise and enhances the piston's resonant motion by aligning the points of elastic force application, thereby minimizing vibration and noise.
Implementation Method 1
a spring device connected to the piston and configured to allow the piston to resonate
Implementation Method 2
a first resonant spring fitted into an outer surface of the second coupling protrusion; and a second resonant spring fitted into an outer surface of the first coupling protrusion
Data Source
AI summary
A linear compressor includes: a shell; a cylinder provided inside the shell; a frame coupled to an outer side of the cylinder; a piston configured to reciprocate in an axial direction; a motor that supplies power to the piston; and a spring mechanism coupled to the piston. The spring mechanism includes: a support connected to the piston and including a spring support unit having one or more insertion holes; a first coupling protrusion that extends from the rear side of the spring support unit along the edge of the insertion hole; a support cap inserted into the insertion hole and including a second coupling protrusion protruding from the front side of the spring support unit; a first resonant spring inserted into the outer circumferential surface of the second coupling protrusion; and a second resonant spring inserted into the outer circumferential surface of the first coupling protrusion.