Controller for a chiller and method for controlling a chiller
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Solution Overview
Problem
Current chiller control systems lack efficient methods for remotely monitoring and controlling chiller parameters, particularly in achieving and maintaining target values for control factors, which can lead to suboptimal operation and user inconvenience.
Innovation Solution
A controller system utilizing a Modbus protocol for communication with chillers, featuring a management screen for inputting state information and control commands, which compares target values with current values and iteratively transmits control factor change commands until the target values are met, allowing for both automatic and manual mode operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a controller system with iterative control is implemented, then control precision is improved, but device complexity increases
Solution Approach 1:
The controller continuously receives current values from the chiller, compares them with target values, and iteratively transmits control commands until the current value matches the target value. This closed-loop feedback mechanism ensures precise control of chiller parameters while maintaining systematic complexity management.
Solution Approach 2:
The controller automatically performs iterative control adjustments without requiring manual intervention. The system self-regulates by continuously monitoring current values, comparing them with targets, and autonomously transmitting correction commands until the desired state is achieved.
2Ease of operation
If remote control and monitoring functions are added, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The controller integrates multiple functions including parameter monitoring, target value setting, iterative control, and remote communication capabilities into a single device. This multi-functional design enables remote operation and comprehensive control while consolidating system complexity into one unified controller rather than requiring separate devices for each function.
Data Source
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AI summary
A method for controlling a chiller includes receiving, by a controller, a target value of a control factor of the chiller, comparing, by the controller, an input target value with a current value of the control factor of the chiller, transmitting, by the controller, a control factor value change command to the chiller if the input target value is not equal to the current value of the control factor of the chiller, receiving, by the controller, a changed current value of the control factor from the chiller, updating, by the controller, the current value of the control factor on a management screen with a received current value of the control factor, and comparing, by the controller, the input target value with the current value of the control factor again.