Systems and methods to operate HVAC system in variable operating mode
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Solution Overview
Problem
Existing HVAC systems are limited in their ability to operate in variable modes due to incompatibility with certain thermostats that do not provide necessary signals for adjusting operating modes, leading to restricted performance.
Innovation Solution
The implementation of secondary control circuitry that determines the type of thermostat and provides additional data or operates in a calibration mode to enable the HVAC system to function in variable operating modes, using either calibrated or predetermined values to compensate for missing signal data from conventional thermostats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the HVAC system is configured to operate in various operating modes, then the system performance and efficiency are improved, but compatibility with certain thermostats deteriorates
Solution Approach 1:
A secondary control circuit acts as an intermediary between the thermostat and the HVAC system. This mediator detects when a thermostat is incompatible with variable operating modes and automatically switches the HVAC system to a compatible operating mode, thereby resolving the compatibility issue while preserving system performance
Solution Approach 2:
The control system is designed to perform multiple functions: it can operate in variable operating modes when compatible thermostats are used, and automatically switch to compatible modes when incompatible thermostats are detected. This multi-functionality ensures both high performance and broad thermostat compatibility
2Loss of energy
If the HVAC system operates in variable operating modes, then energy efficiency is improved, but system complexity increases
Solution Approach 1:
The secondary control circuit automatically detects thermostat compatibility and autonomously switches operating modes without requiring user intervention or complex configuration. This self-service approach simplifies the user interface while maintaining the benefits of variable operating modes
Solution Approach 2:
The system performs preliminary detection of thermostat compatibility upon installation or when issues arise, and proactively switches to an appropriate operating mode before performance degradation occurs. This preliminary action prevents problems rather than reacting to them
Data Source
AI summary
A heating, ventilation, and/or air conditioning (HVAC) system includes secondary control circuitry configured to communicatively couple to primary control circuitry of the HVAC system that is configured to operate the HVAC system in a variable operating mode. The secondary control circuitry is configured to cause operation of the HVAC system in a calibration mode to determine a calibrated target temperature and transmit the calibrated target temperature to the primary control circuitry to enable operation of the HVAC system in the variable operating mode via the primary control circuitry based on the calibrated target temperature.