Hinge-Coupled Vane Rotary Compressor with Involute Cylinder
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Solution Overview
Problem
Conventional vane rotary compressors face issues with high consumption power, increased torque, and chattering noise due to linear vane configurations, which restrict the inner peripheral surface of the cylinder to simple shapes, affecting the coefficient of performance (COP) and fuel efficiency.
Innovation Solution
A vane rotary compressor with a hollow cylinder having an involute curve inner peripheral surface and hinge-coupled cantilever vanes, where the vanes are accommodated in grooves matching the rotor's curvature, reducing the need for a separate back pressure chamber and optimizing the compression chamber volume change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high pressure oil is supplied to the back pressure chamber to push the vane against the cylinder inner peripheral surface, then the vane can be maintained in contact with the cylinder, but consumption power increases
Solution Approach 1:
The vane is designed to automatically press against the inner peripheral surface of the cylinder through its own weight and the pressure differential created during rotor rotation, eliminating the need for external high pressure oil supply to maintain contact stability
Solution Approach 2:
The vane is divided into a body portion and a pressing portion, where the pressing portion specifically contacts the cylinder inner peripheral surface. This segmentation allows the pressing portion to maintain contact through gravitational and pressure forces without requiring high pressure oil supply to the entire vane structure
2Reliability
If high pressure oil is supplied to push the vane, then the vane maintains contact with the cylinder, but torque of the rotary shaft increases
Solution Approach 1:
The vane utilizes its own weight and the pressure differential during rotation to maintain contact with the cylinder, eliminating the need for high pressure oil supply that would increase torque on the rotary shaft
Solution Approach 2:
Instead of using high pressure oil to push the vane outward against the cylinder, the design allows the vane to press against the cylinder through its own weight and rotational dynamics, inverting the traditional force application direction and reducing torque requirements
3Ease of operation
If refrigerant discharge pressure is not properly formed in the initial stage, then the compressor can start, but chattering noise is generated due to insufficient oil pressure to push the vane
Solution Approach 1:
The vane maintains contact with the cylinder through its own weight and pressure differential during rotation, without requiring high pressure oil supply that would be insufficient during initial startup, thereby preventing chattering noise
Solution Approach 2:
The vane contact mechanism dynamically adapts to varying operating conditions including startup phases, maintaining reliable contact through gravitational and pressure forces that remain effective across all operational stages without requiring high pressure oil supply
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 enhances the coefficient of performance (COP), reduces consumption power, minimizes torque, and prevents chattering noise by evenly distributing pressure and reducing the package size while maintaining or increasing compressor capacity.
Implementation Method 1
a front end portion of the vane 700 is pressed against an inner peripheral surface of the cylinder 200 by centrifugal force
Implementation Method 2
low pressure refrigerant is introduced into the compression chamber 8 through the inlet 9 and compressed while the volume of the compression chamber 8 is reduced along with rotation of the rotor 2
Data Source
AI summary
The present invention relates to a vane rotary compressor in which, while a rotor is rotating, the volume of a compressing chamber is reduced and a fluid such as a refrigerant is compressed. The vane rotary compressor according to one embodiment of the present invention is provided with the compressing chamber, the inner circumferential surface of which is formed in the shape of an involute curve, wherein the rotor is hinge-coupled with a plurality of cantilever vanes such that compression efficiency is high and noise is prevented from occurring during the operation of the compressor.