Control method and system for air-conditioner water chilling units and air conditioning system
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In air conditioning systems with multiple water chilling units sharing a waterway, installation position deviations and temperature sensor differences lead to premature shutdown of some units and frequent start-stop cycles, resulting in poor temperature control and reduced service life.
Innovation Solution
A control method and system that manage standby requests among air-conditioner water chilling units by generating and applying standby sequence numbers based on preset rules, ensuring coordinated startup and shutdown to avoid frequent cycling and improve equilibrium control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If temperature control is based on collecting water temperature values to determine start or standby, then temperature control responsiveness is improved, but air-conditioner water chilling units reach closing condition earlier than others due to sensor deviations, causing frequent start-stop cycles and poor equilibrium control
Solution Approach 1:
The system performs preliminary assessment of standby requests from multiple units before executing shutdown actions. By evaluating the number of standby requests and generating standby sequence numbers in advance, the system avoids premature shutdown of individual units, ensuring that units only shut down when necessary and in a coordinated manner, thus extending service life while maintaining temperature control.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring water temperature values from multiple sensors and adjusting the operation of air-conditioner water chilling units based on this feedback. The control method uses feedback from standby requests and temperature measurements to dynamically determine which units should start or standby, improving temperature control while preventing frequent cycling through coordinated decision-making.
2Power
If multiple air-conditioner water chilling units share the waterway, then cooling capacity is improved, but installation position deviations and sensor differences cause unequal operation timing, leading to frequent start-stop cycles
Solution Approach 1:
The system merges the standby requests from multiple air-conditioner water chilling units into a unified decision-making process. By combining information from all units that have entered standby state and using a coordinated shutdown strategy based on standby sequence numbers, the system ensures that multiple units operate together harmoniously, maintaining cooling capacity while avoiding unequal operation timing and frequent start-stop cycles.
Solution Approach 2:
The system dynamically adjusts the operation of multiple air-conditioner water chilling units based on real-time conditions. The standby sequence numbers are generated dynamically according to the number of standby requests received, allowing the system to adapt its control strategy to the current operational state, thereby coordinating unit operations efficiently while maintaining overall cooling capacity.
3Device complexity
If air-conditioner water chilling units operate independently based on local temperature sensors, then individual unit control is simplified, but overall equilibrium control deteriorates due to sensor deviations and detection period differences
Solution Approach 1:
The system implements a universal control mechanism that handles multiple functions: it processes standby requests from any unit, determines the number of requests, generates standby sequence numbers, and coordinates shutdown decisions. This multi-functional approach allows individual units to maintain simple local control logic while the central system ensures overall temperature control equilibrium through coordinated management of all units.
Data Source
AI summary
This disclosure provides a control method and control system for two or more air-conditioning water chilling units, and air conditioning system. The control method includes: receiving at least one standby request generated by at least one air-conditioner water chilling unit of the two or more air-conditioning water chilling units based on a standby condition; determining whether or not two or more standby requests are received; generating standby sequence numbers of the air-conditioning water chilling units that send the standby requests according to the standby requests in case where two or more standby requests are received; and closing the air-conditioning water chilling units that send the standby requests according to a preset rule based on the standby sequence numbers.