Compressor Speed Control Using Dual Temperature and Pressure Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional climate systems have inefficiencies as compressors can only operate at full-on or full-off modes, failing to meet varying cooling demands, and even variable-speed systems like electric air conditioning compressors possess operating inefficiencies.
Innovation Solution
A control system and method for a compressor that assesses actual and target temperatures and pressures to generate optimal compressor speed commands, using a controller with memory data to transmit control signals for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the compressor operates at full-on or full-off modes only, then the device complexity is reduced, but the adaptability to varying cooling demands deteriorates
Solution Approach 1:
The patent implements variable-speed compressor control where the compressor speed is dynamically adjusted based on real-time temperature and pressure conditions. The controller continuously monitors system parameters and modulates the compressor speed accordingly, transitioning from static full-on/full-off operation to dynamic variable-speed operation, thereby improving adaptability while maintaining manageable complexity through automated control algorithms.
Solution Approach 2:
The patent changes the operating parameters of the compressor by introducing dual control based on temperature differential and system pressure. Instead of fixed speed operation, the system varies the compressor speed parameter according to multiple conditional parameters (temperature error, pressure levels), enabling fine-tuned adaptation to different cooling scenarios without excessive complexity.
2Adaptability or versatility
If the compressor speed is varied to meet cooling demands, then the adaptability improves, but operating inefficiencies increase
Solution Approach 1:
The patent implements a feedback-based control system where the compressor speed is continuously adjusted based on real-time monitoring of temperature and pressure parameters. The controller receives feedback from sensors and modulates the compressor operation to maintain optimal efficiency across varying load conditions, preventing energy waste from both over-compression and insufficient cooling capacity.
Solution Approach 2:
The patent applies partial action by adjusting compressor speed to match actual cooling needs rather than operating at full capacity continuously. The system applies just enough compression power required by the current thermal load, avoiding excessive energy consumption while maintaining adequate cooling performance through proportional control.
3Loss of energy
If the compressor operates without speed variation, then the operating efficiency is maintained, but the ability to meet varying cooling demands deteriorates
Solution Approach 1:
The patent introduces dynamic speed control that allows the compressor to adapt its operating speed to match varying cooling demands. By continuously adjusting the compressor speed based on real-time temperature and pressure feedback, the system maintains high operating efficiency across different load conditions while simultaneously improving its ability to meet diverse cooling requirements.
Data Source
AI summary
A control system for a compressor is provided. The control system includes a controller and first and second control portions. The first control portion is configured to assess an actual temperature of an evaporator and a target temperature of the evaporator and to generate a first compressor speed command signal. The second control portion includes a pressure calibration value and is configured to receive a pressure reading of the climate system, to compare the pressure reading to the pressure calibration value and to generate a second compressor speed command signal. The controller device includes data and is configured to receive the first compressor speed command signal and the second compressor speed command signal and to transmit a control signal to the compressor for causing the compressor to operate at a commanded compressor speed based on the first compressor speed command signal, the second compressor speed command signal, and the data.