Reciprocating Compressor Size Reduction and Assembly Simplification
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Solution Overview
Problem
Existing reciprocating compressors are limited by size due to the space required between the compressor main body and the airtight container, have complex assembly processes due to concentricity requirements, and suffer from increased vibration and efficiency limitations due to combined mover and piston assembly and resonance issues.
Innovation Solution
A reciprocating compressor design with a stator fixed within the airtight container, a mover reciprocating in an air gap, and a piston elastically supported to reduce size, simplify assembly, and control relative velocities to enhance efficiency, using separate resonance springs to manage vibrations and reduce compressor size and assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a support spring is used to support the compressor main body within the airtight container, then the compressor main body is stably supported, but the space between the compressor main body and the airtight container increases, leading to increased compressor size
Solution Approach 1:
The support spring is removed from the system. Instead of using a support spring to support the compressor main body, the stator is directly fixed to the airtight container, eliminating the need for intermediate support components and the space they occupy.
Solution Approach 2:
The stator is directly coupled to the airtight container, merging the support function into the structural assembly itself. This integration eliminates the separate support spring component and reduces the overall space required.
2Productivity
If the mover and piston are combined and assembled with concentricity requirements, then the compression efficiency is improved, but the assembly process becomes complicated
Solution Approach 1:
The mover and piston are separated into independent components. The mover is coupled to the stator while the piston is coupled to the cylinder, allowing them to be manufactured and assembled independently without concentricity constraints between them.
Solution Approach 2:
The stator and cylinder act as intermediary components that receive motion from the reciprocating motor independently. The stator receives mover motion while the cylinder receives piston motion, allowing the two compression elements to operate with different velocities and phases.
3Stability of the object's composition
If the support spring is fixed to the stator and cylinder within the airtight container, then the compressor main body is supported, but vibration from the reciprocating motor and compression unit is transmitted to the airtight container, increasing compressor vibration
Solution Approach 1:
The support spring that transmitted vibration to the airtight container is removed. The stator and cylinder are directly fixed to the container without intermediate elastic components, eliminating the vibration transmission path while maintaining structural support.
Solution Approach 2:
The vibration generated by the reciprocating motor is utilized beneficially. By operating the reciprocating motor at a velocity higher than the compression unit, the vibration serves as a driving force that enhances compression efficiency while the direct coupling to the container provides stable support without amplifying harmful vibrations.
4Device complexity
If the velocity of the reciprocating motor is limited to match the compression unit velocity, then the mechanical coupling is simplified, but compressor efficiency is degraded
Solution Approach 1:
The system allows dynamic velocity differences between the reciprocating motor and compression unit. The stator and cylinder are independently coupled to their respective moving parts, enabling the reciprocating motor to operate at optimized velocities that differ from the compression unit velocity, thereby enhancing efficiency.
Solution Approach 2:
The velocity parameter of the reciprocating motor is decoupled from the compression unit velocity. By changing the operating velocity of the reciprocating motor to be higher than the compression unit velocity, the system achieves improved compression efficiency while maintaining simplified mechanical coupling through independent mounting.
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 reduces compressor size, simplifies assembly, attenuates vibration, and increases motor efficiency by adjusting relative velocities and minimizing container vibrations, thereby enhancing overall performance and reducing fabrication costs.
Implementation Method 1
a resonance spring elastically supporting the piston with respect to the airtight container to induce a resonant motion of the piston
Implementation Method 2
a resonance spring elastically supporting the piston with respect to the airtight container
Implementation Method 3
a piston linearly reciprocates within a cylinder to suck, compress, and discharge a refrigerant. The reciprocating compressor may be classified into a connection type reciprocating compressor and a vibration type reciprocating compressor according to a piston driving method.
Implementation Method 4
a piston linearly reciprocates within a cylinder to suck, compress, and discharge a refrigerant
Data Source
AI summary
A reciprocating compressor is provided, a size of which may be reduced by closely attaching and securing a reciprocating motor and a cylinder of a compression device to a sealed receptacle to reduce a gap between a main body of the compressor and the sealed receptacle. In addition, an assembling process for the compressor may be simplified by separating a mover of the reciprocating motor and a piston of the compression device from each other. In addition, vibration of the sealed receptacle may be minimized by properly adjusting a mass of components in the reciprocating motor and the compression device, and elasticity of a spring that supports the reciprocating motor and the compression device to offset a force applied to the sealed receptacle. In addition, efficiency of the reciprocating motor may be enhanced by increasing a relative velocity of the reciprocating motor in comparison with a relative velocity of the compression device.