Distributed HVAC Diagnostics Using Data Bus Blower Feedback

The patent implements a data bus that enables continuous feedback between HVAC components and the controller. Sensors monitor system parameters (temperature, pressure, component status) and feed this information back to the controller, which processes the data and sends control signals back to actuators and components. This closed-loop feedback system provides both advanced control and diagnostic capabilities by making system state information available for analysis.

The controller serves multiple functions: it acts as a processor for control logic, a communication hub on the data bus, a diagnostic analyzer, and a coordinator for multiple HVAC components. The data bus itself serves universal communication purposes across different component types (blowers, coils, sensors, actuators), allowing a single system infrastructure to support both control and diagnostic functions simultaneously.

The patent replaces traditional mechanical control systems (manual thermostats, mechanical switches, hardwired controls) with an electronic data bus system. Components communicate digitally through the data bus, allowing for programmable control logic, remote monitoring, and automated diagnostics. This substitution enables sophisticated energy optimization algorithms while maintaining relatively simple physical installation through the use of a standardized communication backbone.

The system implements dynamic control by continuously adjusting HVAC component operation based on real-time sensor data and system conditions. The controller modifies blower speeds, coil engagement, and damper positions dynamically rather than using fixed mechanical settings. This dynamic adaptation optimizes energy efficiency while the modular data bus architecture keeps installation manageable by allowing flexible component placement and configuration.

The patent divides the HVAC system into independently addressable components (blowers, coils, sensors, actuators) that each have their own identification and can communicate separately on the data bus. This segmentation allows the controller to diagnose individual components independently, isolating faults to specific elements rather than requiring system-wide analysis. The modular architecture improves diagnostic capability while managing complexity through standardized component interfaces.

The data bus acts as an intermediary that simplifies communication between the controller and multiple distributed components. Rather than requiring direct point-to-point connections between the controller and each component, the data bus provides a standardized mediation layer that handles addressing, data transmission, and protocol management. This intermediary infrastructure enables complex distributed diagnostics while presenting a simplified interface to the controller.