Heat exchange system, air conditioning control system, and air conditioning system control method
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Solution Overview
Problem
Conventional vehicle air conditioner systems face challenges in accurately adjusting the opening of electronic expansion valves, leading to potential system misalignment and increased energy consumption, as existing control processes do not effectively manage the initialization and position information of these valves.
Innovation Solution
A heat exchange system with a control unit that stores and utilizes initialization state and position information of electronic expansion valves to adjust their openings efficiently, ensuring they complete initialization before system startup, thereby reducing the risk of misalignment and saving startup time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electronic expansion valve adjusts opening during operation control phase, then the air conditioner system meets flow change requirements, but the valve may go out of step and cause system misalignment
Solution Approach 1:
The control unit performs preliminary initialization before the air conditioner system operates. It sends initialization commands to the electronic expansion valve to preset the opening degree based on predetermined conditions (such as refrigerant type, operating mode). This preliminary positioning ensures the valve starts from a known state, preventing out-of-step issues during subsequent operation control phase adjustments.
Solution Approach 2:
The control unit continuously monitors the actual opening degree of the electronic expansion valve and compares it with the target opening degree. When deviation is detected (out-of-step condition), the control unit sends correction commands to adjust the valve opening back to the correct position. This feedback mechanism maintains system alignment reliability during dynamic operation.
2Reliability
If the electronic expansion valve performs initialization adjustment, then the system achieves optimized performance, but the startup time of the system increases
Solution Approach 1:
The control unit performs only necessary partial initialization actions based on the operating condition. Instead of always performing complete initialization sequences, the system selectively initializes only when needed (e.g., when refrigerant type changes, when operating mode changes, or when the valve has been replaced). This reduces unnecessary startup time while maintaining performance optimization when actually required.
Solution Approach 2:
The initialization data (including opening degree settings for different conditions) is pre-calculated and stored in the control unit's memory during system design or setup. During operation, the control unit simply retrieves and applies the pre-stored initialization parameters, significantly reducing the time required compared to real-time calculation or manual adjustment.
Data Source
AI summary
A heat exchange system, an air conditioning control system, and an air conditioning system control method. A control portion of the heat exchange system respectively adjusts the opening of electronic expansion valves, and controls the electronic expansion valves to store an initialisation state and position information before powering down so that the electronic expansion valves first perform initialisation state switching when next powering up, thereby reducing the risk of the electronic expansion valves being out of step, and saving system start-up time.