Control method and device for air conditioning system and air conditioning system
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Solution Overview
Problem
Existing air conditioning systems in rail transportation, such as subways, lack effective control over air supply amount, leading to unreasonable air supply, large discharge air temperature fluctuations, and reduced user comfort and energy inefficiency.
Innovation Solution
The system adjusts the operating frequency of the compressor and fan based on discharge and return air temperatures, along with current operating frequencies, to optimize air supply and reduce energy consumption.
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 air conditioning load can be adjusted, but the air supply amount cannot be effectively controlled
Solution Approach 1:
The patent implements a feedback control mechanism where the air supply amount controller continuously detects actual air supply amount and compares it with target air supply amount, then adjusts the air supply damper angle accordingly. This closed-loop feedback system enables effective air supply control without requiring complex manual intervention, resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
The system employs self-service control through automated algorithms that calculate target air supply amounts based on temperature differences and system parameters, then automatically adjust air supply dampers. The controller autonomously manages air supply regulation without external intervention, improving ease of operation while maintaining reasonable system complexity.
2Adaptability or versatility
If manual control of air supply amount is used, then the system structure can be simple, but the air supply amount cannot be dynamically adjusted according to load changes
Solution Approach 1:
The patent implements a feedback control mechanism where the air supply amount controller continuously detects actual air supply amount and compares it with target air supply amount, then adjusts the air supply damper angle accordingly. This closed-loop feedback system enables effective air supply control without requiring complex manual intervention, resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
The system dynamically adjusts air supply amount based on real-time temperature differences and load conditions. The air supply amount controller continuously calculates target air supply amounts and adjusts damper positions dynamically, enabling the system to adapt to changing conditions automatically rather than requiring static manual control settings.
3Stability of the object's composition
If the compressor and fan operate without coordinated frequency adjustment, then the system operation is simple, but the discharge air temperature fluctuates greatly
Solution Approach 1:
The patent implements coordinated feedback control where the compressor frequency controller and fan frequency controller work together based on discharge air temperature detection. The system continuously monitors temperature and adjusts compressor and fan frequencies in coordination to maintain stable discharge air temperature, resolving the contradiction between temperature stability and control system complexity.
Solution Approach 2:
The system merges the control of compressor frequency and fan frequency into a coordinated control system. Both components are adjusted together based on discharge air temperature feedback, creating a unified control approach that stabilizes temperature while avoiding the need for separate, complex control systems for each component.
4Use of energy by moving object
If the air conditioning system does not optimize operating frequencies, then the system operation is simple, but the energy consumption is high
Solution Approach 1:
The system dynamically adjusts compressor and fan operating frequencies based on real-time temperature differences, load conditions, and system parameters. The frequency controllers continuously optimize operating points to minimize energy consumption while meeting cooling demands, resolving the contradiction between energy efficiency and system complexity through automated dynamic optimization.
Solution Approach 2:
The patent changes operating parameters (frequencies of compressor and fan) dynamically based on system conditions and temperature differences. By adjusting these parameters optimally, the system reduces energy consumption without requiring complex structural changes, resolving the contradiction between energy efficiency and device complexity.
Data Source
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AI summary
A control method and device for an air conditioning system, the control method comprising executing at least one of the following operations: obtaining the current air supply temperature of an air conditioning system as well as the current operating frequency of a fan, and controlling a compressor of the air conditioning system to adjust the operating frequency according to the air supply temperature and the current operating frequency of the fan; obtaining the current return air temperature of the air conditioning system and the current operating frequency of the compressor, and adjusting the operating frequency of the fan according to the return air temperature and the current operating frequency of the compressor. The control method may effectively control the air supply volume of the air conditioning system, thus improving user experience.