Control system of air conditioner and air-conditioning device
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Solution Overview
Problem
Conventional distributed central air-conditioning control systems face challenges in fault isolation and maintenance due to centralized control logic, leading to operational disruptions and increased energy consumption.
Innovation Solution
A modular control system for air conditioners is introduced, comprising independent main machine, water pump, cooling tower, and tail end control assemblies that operate cooperatively, allowing for flexible control and reduced energy consumption, with each assembly receiving feedback parameters to adjust operations autonomously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized master controller is used to control each device in the distributed central air-conditioning system, then the control logic can be unified and coordinated, but when a device fails the execution logic is likely to interrupt and spread the failure to other parts making the system difficult to maintain and requiring the whole system to stop operating
Solution Approach 1:
The control system is divided into multiple independent control modules, each responsible for controlling a specific device (chiller, water pump, cooling tower, air handling unit). Each module has its own processor and can operate independently, so that a failure in one module does not affect the others. The modules communicate through a message queue mechanism, allowing the system to maintain overall functionality even when individual components fail.
2Ease of repair
If the control system is divided into independent control modules for each device, then the system becomes easier to maintain and faults are easier to locate, but the coordination and cooperation between devices may be compromised
Solution Approach 1:
A message queue mechanism is introduced as an intermediary between the independent control modules. The message queue allows modules to communicate and coordinate their operations without direct coupling. Each module can publish its state and receive commands through the message queue, enabling coordinated control of the entire air-conditioning system while maintaining the independence and ease of maintenance of individual modules.
3Adaptability or versatility
If conventional centralized control logic is used, then system coordination is maintained, but the construction and debugging periods are extended and labor costs increase
Solution Approach 1:
The control system is divided into multiple independent control modules, each responsible for controlling a specific device (chiller, water pump, cooling tower, air handling unit). Each module has its own processor and can operate independently, so that a failure in one module does not affect the others. The modules communicate through a message queue mechanism, allowing the system to maintain overall functionality even when individual components fail.
4Productivity
If the control system uses a modular architecture with independent control assemblies, then system flexibility is improved and energy consumption is reduced, but the device complexity increases
Solution Approach 1:
Each control module is designed with a universal structure that can control different types of air-conditioning devices. The control modules use standardized interfaces and communication protocols, allowing them to be applied to various devices (chillers, water pumps, cooling towers, air handling units) without requiring device-specific customizations. This universality reduces the perceived complexity by providing a consistent control approach across different device types.
Data Source
AI summary
Provided in the present application are a control system of an air conditioner and an air-conditioning device. The control system of the air conditioner comprises: a main machine control assembly receiving a feedback parameter of a main machine, to adjust, according to the feedback parameter, a water discharge temperature of the main machine; a water pump control assembly, and the water pump control assembly is in communication with the main machine control assembly, to adjust, according to a feedback parameter of the water pump, an operating parameter of a water pump; a cooling tower control assembly, and the cooling tower control assembly is connected to the water pump control assembly, to adjust, according to an environment parameter and a target water discharge temperature, the current water discharge temperature of a cooling tower; and a tail end control assembly.