Systems and methods for air temperature control using a target time based control plan
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Solution Overview
Problem
Current HVAC systems face limitations due to the high cost and limited interoperability of communicating systems, which restrict consumer choice and flexibility in using both communicating and non-communicating equipment, making it difficult to retrofit or upgrade without complete replacement.
Innovation Solution
A controller system that operates HVAC units based on a target time control plan, allowing for the integration of both communicating and non-communicating equipment, using a communication module for data exchange and sensor terminals for temperature monitoring, enabling the development and adjustment of control plans to achieve desired temperature settings efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If communicating systems are used to provide improved control and flexibility, then the degree of control and system flexibility is improved, but the cost increases and interoperability is limited
Solution Approach 1:
The controller is designed to support multiple communication protocols including communicating protocols (such as BACnet, Modbus, LonWorks) and legacy protocols (such as 24VAC on/off signals). This multi-functionality allows the same controller to work with both communicating and non-communicating HVAC equipment, providing system flexibility without requiring different controllers for different equipment types, thereby avoiding the cost penalty of communicating systems while maintaining adaptability.
Solution Approach 2:
The controller acts as an intermediary between thermostats and HVAC equipment, translating control signals between different protocols. It can receive control signals from a legacy thermostat using simple 24VAC on/off signals and translate them into appropriate control commands for communicating HVAC equipment, or vice versa. This intermediary function enables interoperability between communicating and non-communicating components without requiring complete system replacement.
2Ease of manufacture
If communicating systems are used to provide automatic identification and configuration, then installation and setup ease is improved, but the ability to retrofit or upgrade is limited
Solution Approach 1:
The controller dynamically adapts its operation based on the type of thermostat and HVAC equipment connected. It can automatically detect whether a thermostat is communicating or legacy, and adjust its communication protocol and control strategy accordingly. This dynamic adaptability allows the system to be easily installed with either type of equipment and enables retrofits by simply connecting new equipment to the existing controller without requiring complete system replacement.
Solution Approach 2:
The controller provides universal compatibility by supporting multiple communication protocols and control methods simultaneously. It can interface with both communicating thermostats (providing automatic identification and configuration) and legacy thermostats (using simple on/off signals). This universality enables easy installation with any thermostat type while maintaining the ability to retrofit or upgrade individual components without replacing the entire system.
3Adaptability or versatility
If legacy systems are used to provide equipment flexibility and consumer choice, then interoperability is improved, but the degree of control is limited
Solution Approach 1:
The controller replaces simple mechanical on/off control with intelligent electronic control. It can interpret and execute complex control algorithms, optimize HVAC operation based on environmental conditions, and provide enhanced user interfaces. This substitution maintains compatibility with legacy equipment while significantly improving the degree of control available to consumers, allowing for features such as programmable schedules, temperature optimization, and energy management that go beyond basic on/off control.
Solution Approach 2:
The controller provides self-service capabilities by automatically optimizing HVAC operation based on environmental sensors and pre-programmed algorithms. It can independently adjust setpoints, manage equipment sequencing, and optimize energy consumption without requiring complex user intervention. This enhances the degree of control while maintaining simplicity for the end user, building upon legacy equipment flexibility while adding intelligent control functions.
Data Source
AI summary
A system and method for controlling the air temperature of a building using a control plan based on a target time. The system includes a controller which may be connected to a number of indoor and outdoor heating ventilation and air-conditioning units. The system may include a thermostat. The system may also operate without a thermostat. The method includes determining a control plan to reach a desired temperature in a target time. The method also includes updating the plan by comparing the actual time to reach the desired temperature with the target time.