HVAC Subnet Controllers via Data Bus for Zone Control
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Solution Overview
Problem
Conventional HVAC systems lack advanced control and data acquisition techniques, leading to limitations in flexibility, installation ease, user operation, energy efficiency, diagnostic capabilities, and maintenance, particularly in providing precise temperature and humidity control across multiple premises.
Innovation Solution
A networked HVAC system with a data processing and communication network featuring subnets, demand units, comfort sensors, and subnet controllers that communicate via a data bus, allowing for advanced control, data sharing, and flexible configuration, enabling superior temperature and humidity control, energy efficiency, and simplified maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional HVAC systems are used, then the system structure is simple, but the flexibility and ease of installation are limited
Solution Approach 1:
The HVAC system is divided into multiple subnets, each capable of independent operation and control. This segmentation allows the system to be installed and configured in modular units, improving flexibility and ease of installation while maintaining manageable complexity through standardized interfaces between subnets.
2Ease of operation
If conventional HVAC systems are used, then the system is easy to manufacture, but the ease of operation and user control are limited
Solution Approach 1:
A data bus serves as an intermediary communication channel between subnets, demand units, comfort sensors, and controllers. This standardized communication interface simplifies user interaction and system operation while the underlying complex control logic remains encapsulated within the subnet modules, making the system both easy to operate and manufacturable.
3Measurement precision
If conventional HVAC systems are used, then the system has basic control capabilities, but the temperature and humidity control precision is insufficient
Solution Approach 1:
Each subnet is equipped with dedicated comfort sensors and demand units that locally monitor and control temperature and humidity conditions. This distributed local quality approach enables precise environmental control in each zone while the overall system complexity is managed through standardized subnet interfaces and data bus communication.
4Ease of repair
If conventional HVAC systems are used, then the system has limited diagnostic capabilities, but the maintenance complexity is low
Solution Approach 1:
The data bus network provides continuous feedback communication between subnets, comfort sensors, and controllers, enabling real-time monitoring of system status and performance. This feedback mechanism enhances diagnostic capabilities by allowing remote detection and troubleshooting of issues while the modular subnet architecture keeps maintenance complexity manageable through standardized interfaces.
Data Source
AI summary
An HVAC data processing and communication network includes a first subnet and a second subnet. The first subnet includes a first demand unit, a first comfort sensor and a first subnet controller. The second subnet includes a second subnet comprising a second demand unit, a second comfort sensor and a second subnet controller. The second subnet controller is configured to control an operation of the first subnet.