Control method and device for controlling air conditioning unit, and air conditioning unit
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Solution Overview
Problem
Current air conditioning unit control methods lack precision and effectiveness due to inadequate analysis of interacting operating parameters, leading to suboptimal operating states and poor energy-saving performance.
Innovation Solution
A control method and device that obtain and analyze various parameters such as return air temperature, condensation temperature, evaporation temperature, compressor parameters, and fan parameters to determine optimal compressor and fan frequencies, minimizing power consumption and ensuring precise energy-saving control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If compressor and fan frequencies are controlled based on simple ambient temperature detection, then control implementation is simple, but energy-saving performance is poor and operating state is suboptimal
Solution Approach 1:
The patent changes control parameters from simple ambient temperature to multiple operating parameters including return air temperature, condensation temperature, evaporation temperature, compressor parameters, and fan parameters. By monitoring and analyzing these multiple parameters simultaneously, the system determines optimal compressor and fan frequencies that minimize power consumption while maintaining effective cooling, thus resolving the contradiction between control complexity and energy-saving performance.
Solution Approach 2:
The patent implements a feedback control mechanism where the controller continuously monitors multiple operating parameters (return air temperature, condensation temperature, evaporation temperature, compressor parameters, fan parameters) and adjusts compressor and fan frequencies based on real-time system state. This closed-loop feedback approach enables precise energy-saving control by dynamically optimizing operating points according to actual conditions, achieving superior energy efficiency despite increased control complexity.
2Measurement precision
If multiple operating parameters are analyzed to determine optimal frequencies, then energy-saving control precision is improved, but control system complexity increases
Solution Approach 1:
The patent segments the control system into distinct functional modules: parameter detection modules for return air temperature, condensation temperature, evaporation temperature, compressor parameters, and fan parameters; a control module for analyzing all parameters and determining optimal frequencies; and execution modules for adjusting compressor and fan operations. This modular segmentation manages complexity by organizing multiple parameter analyses into structured, independent components while maintaining high control precision through coordinated operation of all segments.
3Productivity
If compressor and fan frequencies are adjusted independently, then individual component control is simple, but overall operating state optimization is poor
Solution Approach 1:
The patent merges the control of compressor and fan into a unified coordinated control system. The control module simultaneously analyzes multiple operating parameters including both compressor parameters and fan parameters, then determines optimal compressor frequency and optimal fan frequency together rather than independently. This combined approach ensures that adjustments to one component are coordinated with the other, achieving optimal overall operating state and maximum energy-saving效果 while managing coordination complexity through integrated control logic.
Data Source
AI summary
The present application provides a control method and device for an air conditioning unit, the method including: obtaining a return air temperature, a condensation temperature, an evaporation temperature, compressor parameters, and fan parameters of the air conditioning unit; determining a preset evaporation temperature according to the return air temperature, the condonation temperature, the evaporation temperature, the compressor parameters, the fan parameters, a compressor power curve, and a fan power curve, wherein the sum of a compressor power and a fan power is minimized at the preset evaporation temperature; determining a preset compressor frequency and a preset fan frequency corresponding to the preset evaporation temperature according to the compressor power curve and the fan power curve; controlling a compressor according to the preset compressor frequency; and controlling a fan according to the preset fan frequency.