Control method and device for air conditioning system and air conditioning system
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Solution Overview
Problem
Air conditioning systems in rail transportation, such as subways, face challenges in controlling air supply amounts effectively, leading to unreasonable air supply, large discharge air temperature fluctuations, and increased energy consumption due to suboptimal operation of compressors and fans.
Innovation Solution
A control method and device that adjust the operating frequency of compressors and fans based on discharge air temperature and return air temperature to optimize their operation, ensuring the air conditioning system operates at the best frequency, thereby controlling the air supply amount more effectively and improving user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the air conditioning system adjusts pressure load only by detecting indoor environment temperature, then the control method is simple, but the air supply amount cannot be effectively controlled leading to large discharge air temperature fluctuations
Solution Approach 1:
The patent implements a closed-loop feedback control system that detects both indoor environment temperature and air supply amount, then adjusts compressor and fan operating frequencies based on feedback from temperature sensors and flow meters. This dual-parameter feedback mechanism resolves the contradiction by maintaining simple operation while achieving stable discharge air temperature through continuous monitoring and adjustment.
Solution Approach 2:
The system changes operating parameters dynamically by adjusting compressor frequency and fan frequency based on real-time detection of indoor temperature and air supply amount. This parameter adjustment strategy enables effective control of discharge air temperature stability while maintaining operational simplicity through automated frequency modulation.
2Device complexity
If the air conditioning system operates without coordinated control of compressor and fan frequencies, then the device complexity is low, but energy consumption increases due to suboptimal operation
Solution Approach 1:
The patent dynamically adjusts operating parameters by modulating compressor frequency and fan frequency based on real-time system conditions. This coordinated parameter control optimizes energy consumption by ensuring both components operate at efficient operating points, resolving the contradiction between low device complexity and reduced energy use through intelligent frequency management.
Solution Approach 2:
The system transitions from static operation to dynamic coordinated control, where compressor and fan frequencies are continuously adjusted based on detected temperature and air supply conditions. This dynamic optimization reduces energy consumption while maintaining acceptable device complexity through adaptive frequency modulation rather than fixed operational modes.
3Device complexity
If manual control of air supply amount is used, then the control system is simple, but the air supply amount cannot be effectively regulated leading to unreasonable air supply
Solution Approach 1:
The patent implements automated feedback control that detects air supply amount using flow meters and indoor temperature using sensors, then automatically adjusts fan and compressor frequencies to achieve effective air supply regulation. This feedback mechanism resolves the contradiction by maintaining simple control system structure while dramatically improving air supply regulation effectiveness through automated closed-loop control.
Solution Approach 2:
The system enables self-regulation of air supply amount by automatically detecting system conditions and adjusting component frequencies without manual intervention. This self-service capability improves air supply regulation effectiveness while keeping the control system structure simple, as the system autonomously optimizes its own operation based on real-time feedback.
Data Source
AI summary
The present application discloses a control method and device of an air conditioning system, for solving the problem of ineffectively controlling the air supply amount of the air conditioning system in the related art. The disclosed control method includes performing at least one of: acquiring a current discharge air temperature of an air conditioning system and a current operating frequency of a fan, and controlling a compressor of the air conditioning system to adjust an operating frequency of the compressor according to the discharge air temperature and the current operating frequency of the fan; or acquiring a current return air temperature of the air conditioning system and a current operating frequency of the compressor, and adjusting an operating frequency of the fan according to the return air temperature and the current operating frequency of the compressor.