Volume ratio control system for a compressor
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Solution Overview
Problem
Existing compressors face limitations in controlling volume ratio due to finite piston positions and the need for additional components like proportional valves, leading to increased costs and limited control precision.
Innovation Solution
A volume ratio control system for a screw compressor that uses a biasing device, such as a spring, to adjust the position of a piston within a chamber based on pressure differentials, allowing for infinitely variable control without additional mechanical or electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a compressor is equipped with both a variable capacity control system and a volume ratio control system, then the adaptability to different cooling demands is improved, but the device complexity increases
Solution Approach 1:
The control system is divided into two independent but coordinated subsystems: a variable capacity control system that adjusts overall compressor output, and a volume ratio control system that optimizes the gas distribution between cylinders. This segmentation allows each subsystem to handle specific control aspects, improving overall adaptability while maintaining manageable complexity through modular design.
Solution Approach 2:
The compressor system is designed to perform multiple functions through integrated control mechanisms. The variable capacity control system and volume ratio control system work together to provide both capacity adjustment and optimal gas distribution, making the compressor adaptable to various cooling demands across different operating conditions.
2Productivity
If the volume ratio control system adjusts the volume ratio of gas distributed to each cylinder, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The volume ratio control system dynamically adjusts the volume ratio of gas distributed to each cylinder based on real-time operating conditions. This dynamic adjustment capability allows the compressor to optimize productivity across varying loads and conditions, with the control system adapting its parameters to maintain peak efficiency.
Solution Approach 2:
The system changes the volume ratio parameter of gas distribution to each cylinder to optimize productivity. By adjusting this key parameter based on operating conditions, the compressor can maintain high efficiency across different production demands without requiring complete system redesign.
3Use of energy by moving object
If the compressor operates at part-load conditions, then the energy consumption is reduced, but the manufacturing precision of volume ratio control deteriorates
Solution Approach 1:
The volume ratio control system incorporates feedback mechanisms that continuously monitor operating conditions and adjust control parameters accordingly. This feedback ensures that even at part-load conditions where precision challenges arise, the system can maintain accurate volume ratio control through real-time corrections based on actual performance data.
Data Source
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AI summary
Volume ratio control system for a compressor including a chamber (118) formed within a housing (112) of the compressor (100), a piston (116) disposed within the chamber (118), where the piston (116) is configured to separate the chamber (118) into at least a first portion (120) fluidly coupled to a low pressure side (104) of the compressor and a second portion (122) fluidly coupled to a high pressure side (106) of the compressor, and a biasing device (124) disposed within the chamber, where the biasing device (124) is configured to adjust a position of the piston (116) in response to a pressure differential between the low pressure side (104) of the compressor and the high pressure side (106) of the compressor falling below a threshold value.