Multi-zone indoor climate control and a method of using the same
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Solution Overview
Problem
Traditional zoned HVAC systems require additional equipment and costly damper installations to achieve comfort level balance across multiple zones, which is impractical and costly, especially in existing homes with limited access to ductwork.
Innovation Solution
A multi-zone HVAC system with a controller communicating with sensors to measure environmental conditions, identify occupied zones, calculate demand values, and adjust HVAC components to balance temperature and humidity, eliminating the need for additional equipment by optimizing air conditioning based on zone balance points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If dampers and additional HVAC systems are added to control multiple zones independently, then comfort level balance across zones is improved, but installation cost and system complexity increase
Solution Approach 1:
The single HVAC system is designed to perform multiple functions by serving different zones with different comfort requirements through electronic control. The system uses a microprocessor-based controller to dynamically adjust airflow distribution to multiple zones without requiring separate HVAC systems for each zone, thus achieving multi-zone comfort control with a single universal system.
Solution Approach 2:
Traditional mechanical dampers and zone control mechanisms are replaced with an electronic control system using a microprocessor-based controller, sensors, and algorithms. The system electronically monitors temperature and humidity in each zone and automatically adjusts airflow distribution through the existing ductwork without mechanical dampers, substituting mechanical complexity with electronic intelligence.
2Ease of operation
If dampers are field installed into duct branches for each zone, then zone-specific comfort control is achieved, but installation cost becomes prohibitive especially in existing homes
Solution Approach 1:
The system uses the existing ductwork infrastructure to serve multiple zones without requiring additional installation of dampers or modification of the duct system. The intelligent controller automatically distributes conditioned air to different zones based on real-time environmental conditions and occupancy patterns, allowing the system to self-adjust to provide zone-specific comfort using the already-installed ductwork.
Solution Approach 2:
The system changes the operational parameters of the single HVAC system dynamically based on zone conditions. By monitoring temperature, humidity, and occupancy in each zone and adjusting airflow distribution accordingly, the system provides zone-specific comfort control through parameter changes rather than physical modifications to the ductwork or installation of additional components.
3Device complexity
If a single blower circulates air to various parts of the environment, then system simplicity is maintained, but comfort balance across multiple zones deteriorates
Solution Approach 1:
The system transforms the static operation of a single blower into a dynamic, adaptive system. The microprocessor-based controller continuously monitors environmental conditions in multiple zones and dynamically adjusts airflow distribution in real-time. This dynamic control allows the simple single-blower system to provide balanced comfort across zones by continuously adapting to changing conditions without requiring multiple blowers or complex mechanical dampers.
Solution Approach 2:
The system implements feedback control by using sensors to monitor temperature and humidity in each zone and feeding this information back to the microprocessor-based controller. The controller processes this feedback and automatically adjusts airflow distribution to maintain comfort balance across all zones. This closed-loop feedback mechanism enables the simple single-blower system to achieve sophisticated multi-zone comfort control.
Data Source
AI summary
A system and method of conditioning air within a multi-zone system using a controller in communication with at least one sensor located within at least one of a plurality of zones, the method comprising the steps of: operating the at least one sensor to measure at least one environmental condition within at least one of the plurality of zones, identifying which, if any, of the plurality of zones is occupied, determining whether a demand condition exists within at least one occupied zone, calculating the difference between an actual environmental condition and a desired environmental condition within the plurality of zones to create a zone demand value if a demand condition exists in two or more occupied zones, and determining whether a cumulative zone demand value is equal to a zone balance point value.