Air Conditioner Water Pump Control for Load-Responsive Frequency Switching
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Solution Overview
Problem
Existing air conditioner water systems face challenges in accurately reflecting changes in load, leading to potential control system failures when using single control methods based on pressure difference or temperature difference, resulting in delayed adjustments during significant load changes.
Innovation Solution
A control method and device that adaptively adjust the operating frequency of the water pump in an air conditioner water system by acquiring and utilizing both pressure and temperature differences between the inlet and outlet pipes, dynamically switching between pressure difference-based and temperature difference-based control based on preset conditions to ensure timely and stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only pressure difference-based control method is used, then the control system is simple, but it cannot accurately reflect changes in load which may lead to control system failure
Solution Approach 1:
The patent combines pressure difference-based control and temperature difference-based control into a unified control system. The controller switches between the two control methods based on system conditions, allowing the system to leverage the simplicity of pressure control while incorporating the load-accuracy of temperature control, thereby improving reliability without excessive complexity
Solution Approach 2:
The patent changes the control parameter dynamically by switching between pressure difference and temperature difference based on system state. When the water outlet temperature meets requirements, pressure difference control is used for simplicity; when temperature requirements are not met, temperature difference control takes over to accurately reflect load changes
2Measurement precision
If only temperature difference-based control method is used, then the control can reflect load changes, but the air conditioner water system will be adjusted after a lag time which adversely affects the timeliness and speed of control
Solution Approach 1:
The patent dynamically switches control parameters between pressure difference and temperature difference based on system state. Pressure difference provides immediate response to load changes, while temperature difference provides accurate load measurement, achieving both timeliness and precision
Solution Approach 2:
The system uses pressure difference control as a preliminary control method that responds immediately to load changes. When temperature requirements are not met, it transitions to temperature difference control to correct the load, effectively using the faster pressure response while maintaining temperature accuracy
3Device complexity
If single control method is used, then the control system is simple, but it cannot adapt to changing system loads which may lead to control system failure
Solution Approach 1:
The patent implements a dynamic control system that adapts its control method based on real-time system conditions. The controller monitors temperature requirements and switches between pressure difference control and temperature difference control, enabling the system to adapt to varying loads and conditions while maintaining reasonable complexity
Solution Approach 2:
The control parameter is changed dynamically based on system state - using pressure difference when temperature requirements are met, and switching to temperature difference when they are not, thereby achieving adaptability to load changes
Data Source
AI summary
An air conditioner water system, a control method therefor, and a control device thereof, the method includes acquiring the pressure difference and temperature difference between a water intake pipe and a water discharge pipe of an air conditioner water system, the water intake pipe being connected to an inlet of a host module of the air conditioner water system, and the water discharge pipe being connected to an outlet of the host module; detecting and confirming that the pressure difference is less than or equal to a preset pressure difference, and controlling the operating frequency of a water pump of the air conditioner water system according to the pressure difference; and detecting and confirming that the pressure difference is greater than the preset pressure difference, and controlling the operating frequency of the water pump of the air conditioner water system according to the temperature difference.