Air conditioning system, control system, and control method for air conditioning system expansion valve
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Solution Overview
Problem
Conventional automotive air conditioning systems face challenges in accurately adjusting the opening degree of electronic expansion valves, leading to potential desynchronization and suboptimal energy consumption.
Innovation Solution
The air conditioning system incorporates a control method that adjusts the opening degree of multiple electronic expansion valves separately, using valve opening position information and pressure differential data to calibrate target positions, ensuring synchronized operation and reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the opening degree of electronic expansion valves is adjusted to adapt to compressor flow variation requirements, then the energy saving performance of the air conditioning system is improved, but the risk of valve desynchronization increases
Solution Approach 1:
The system performs preliminary calibration of the electronic expansion valves during the startup stage to establish accurate position relationships before entering the operating control stage. This preliminary action ensures that subsequent adjustments during operation maintain synchronization and prevent desynchronization risks.
Solution Approach 2:
The control system continuously monitors the opening positions of multiple electronic expansion valves and implements feedback control to maintain synchronization. By detecting position deviations and adjusting valve openings in real-time, the system ensures coordinated operation while adapting to varying compressor flow requirements for optimal energy efficiency.
2Productivity
If multiple electronic expansion valves are adjusted separately to optimize control performance, then the energy efficiency is improved, but the system complexity increases
Solution Approach 1:
The control system divides the adjustment process into distinct stages: a startup calibration stage for establishing baseline positions and an operating control stage for dynamic adjustments. This segmentation allows complex multi-valve coordination to be managed through structured, phase-specific control logic, improving performance while organizing system complexity.
Solution Approach 2:
The system implements dynamic control strategies that adapt to different operating conditions. During startup, valves are calibrated in a controlled sequence; during operation, adjustments are made dynamically based on real-time system state. This dynamic approach optimizes control performance across varying conditions while managing complexity through context-appropriate control modes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the risk of electronic expansion valve desynchronization, optimizes control performance, and improves energy efficiency by minimizing valve opening deviations and interferences between branches.
Implementation Method 1
the second heat exchanger includes a first heat exchange portion and a second heat exchange portion, the first heat exchange portion and the second heat exchange portion are configured to exchange heat with each other
Data Source
AI summary
An air conditioning system. A first evaporator and a second evaporator are connected in parallel. A first electronic expansion valve is serially connected to the first evaporator, and a second electronic expansion valve is serially connected to the second evaporator, so that the opening degrees of the first electronic expansion valve and the second electronic expansion valve can be separately adjusted, the first electronic expansion valve and the second electronic expansion valve can perform position correction according to valve opening position information of the first electronic expansion valve and the second electronic expansion valve stored by the air conditioning system, and separately adjust target positions to calibrated target positions. Also disclosed are a control system and a control method for the air conditioning system.