HVAC Data Bus Architecture for Flexible Distributed Control
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Solution Overview
Problem
Conventional HVAC systems lack advanced control and data acquisition techniques, making them less flexible, more difficult to install and maintain, and less efficient in temperature and humidity control, while also requiring more frequent repairs and having shorter service lives.
Innovation Solution
A data processing and communication network for HVAC systems that uses a subnet controller, environmental sensors, and user interfaces connected via a data bus, allowing for flexible control, improved installation, operation, and maintenance, and enhanced energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional HVAC systems are used, then basic temperature control is provided, but the system lacks flexibility, requires frequent repairs, and has shorter service life
Solution Approach 1:
The HVAC system is divided into multiple independently addressable components (subnet controllers, environmental sensors, user interfaces) that communicate via a data bus. This segmentation allows individual components to be upgraded, replaced, or configured independently, enhancing both reliability and adaptability without requiring system-wide changes.
2Ease of operation
If conventional HVAC control systems are used, then basic on/off control is achieved, but installation and maintenance become more difficult
Solution Approach 1:
A data bus serves as an intermediary communication medium between all HVAC components. This standardized communication interface simplifies installation by providing a universal connection method and eases maintenance by allowing components to be addressed and controlled individually through the same bus, reducing the complexity of wiring and configuration.
Solution Approach 2:
The data bus provides a universal communication infrastructure that can accommodate multiple types of devices (subnet controllers, sensors, user interfaces) with different functions. This multi-functionality allows a single communication medium to handle various control, monitoring, and user interaction tasks, simplifying installation while maintaining system capabilities.
3Loss of energy
If conventional HVAC systems are used, then basic climate control is provided, but energy efficiency is reduced
Solution Approach 1:
Environmental sensors continuously monitor conditions and provide feedback to subnet controllers via the data bus. This automated feedback loop enables real-time adjustments to system operation based on actual environmental conditions, improving energy efficiency by preventing unnecessary heating or cooling while maintaining comfortable conditions.
Solution Approach 2:
The system components automatically adjust their operation based on data exchanged over the bus without requiring manual intervention. Subnet controllers autonomously manage device operations based on sensor inputs and user preferences, reducing energy waste from manual control delays while maintaining high automation levels.
Data Source
AI summary
The disclosure provides an HVAC data processing and communication network and a method of manufacturing the same. In various embodiments, the network includes a subnet controller configured to control networked devices via a data bus. The subnet controller is configured to be addressable over the data bus. An environmental sensor is configured to provide environmental data to the subnet controller, and is further configured to be addressable over the data bus independent of addressing the subnet controller. A user interface is configured to provide access by an operator to the network. The user interface is further configured to be addressable over the data bus independently of addressing the subnet controller and the environmental sensor.