Multi-Strand Linear Compressor Spring for Lateral Force Reduction
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Solution Overview
Problem
Existing linear compressors face issues with lateral force distortion due to misaligned central axes of the actuator and resonant springs, limited reciprocation speed due to small spring sizes, and increased size and complexity due to multiple springs, making them inefficient and compactness challenging.
Innovation Solution
A linear compressor design where the central axis of the driving assembly and the spring coincide, using a spring composed of multiple strands that axially elastically support the piston, with front and rear spring links disposed in the same planes to minimize lateral force and enhance load resistance, allowing for high-speed operation and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple resonant springs are disposed behind the piston, then the vibration and noise due to actuator movement are reduced, but the central axes of the springs do not coincide with the actuator central axis, generating lateral force and causing distortion
Solution Approach 1:
The resonant spring is divided into multiple strands (first, second, and third strands) that are circumferentially spaced apart. Each strand is a separate elastic element that collectively supports the actuator, allowing the central axis of the combined spring assembly to coincide with the actuator central axis while eliminating lateral force distortion.
Solution Approach 2:
Multiple spring strands are combined into a single integrated spring assembly that functions as one unified support structure. The strands work together to provide elastic support in the axial direction while their circumferential distribution ensures balanced force application without lateral distortion.
2Strength
If multiple resonant springs are provided, then the load resistance is improved, but the configuration becomes complicated and the shell size increases
Solution Approach 1:
Multiple spring strands are merged into a single integrated spring assembly that functions as one unified component. This provides the load resistance of multiple springs while maintaining a simple, compact configuration that fits within the existing shell space without increasing overall complexity.
Solution Approach 2:
The spring strands are arranged in the circumferential direction (rotational dimension) rather than being disposed separately in the axial direction. This three-dimensional arrangement allows multiple elastic elements to occupy a compact space while providing enhanced load resistance without increasing the axial height or complicating the installation configuration.
3Object-affected harmful factors
If small resonant springs are used, then the vibration reduction is achieved, but they cannot resist large load or repetitive load, limiting the reciprocation speed
Solution Approach 1:
The spring is segmented into multiple strands that collectively provide both vibration reduction and high load resistance. Each strand can be optimized for vibration damping while their combined structure handles large repetitive loads, enabling high-speed reciprocation without compromising either vibration control or load-bearing capacity.
Solution Approach 2:
The spring assembly functions as a composite elastic structure where multiple strands work together to provide properties that neither a single small spring nor a single large spring could achieve alone. The composite structure delivers both vibration damping characteristics and high load resistance necessary for high-speed operation.
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 reduces lateral force on the spring, increases load resistance, enhances compression efficiency, and simplifies the internal structure, leading to improved performance and reduced size, enabling more flexible installation and efficient operation.
Implementation Method 1
a spring that axially elastically supports the piston (130)
Data Source
AI summary
A linear compressor includes a piston that reciprocates on a spring central axis extending in an axial direction and a spring that axially elastically supports the piston. The spring includes a plurality of spring strands. The spring strands each include a spring body spirally extending along a spring central axis C, a front spring link forming an end of the spring body by extending from a side of the spring body, and a rear spring link forming the other end of the spring body by extending from the other side of the spring body. Of the spring strands, the front spring links are disposed axially in the same plane P1 and the rear spring links are disposed axially in the same plane P2.