HVAC Airflow Control via Sensor Feedback
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Solution Overview
Problem
Current HVAC systems lack customizable airflow distribution, with mode door linkages being complex, noisy, and designed to provide predetermined airflow settings, limiting user customization and comfort.
Innovation Solution
Incorporating a control module with airflow sensors and actuators that adjust mode door positions to achieve a requested airflow distribution pattern, allowing users to customize airflow settings for enhanced comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mode door linkages are designed to provide predetermined airflow settings, then manufacturing is simplified, but user customization capability is lost
Solution Approach 1:
The patent applies dynamics by replacing fixed, predetermined mode door linkages with dynamically adjustable actuators that can change door positions in real-time based on user input. The mode doors transition from static predetermined positions to dynamic adjustable positions, allowing continuous customization of airflow distribution while maintaining manufacturing simplicity through standardized actuator components.
Solution Approach 2:
The system changes the parameter of door position from fixed predetermined values to continuously adjustable values. By using actuators with feedback control, the system can set door positions to any angle within a range, transforming the discrete predetermined settings into continuous adjustable parameters that respond to user preferences.
2Manufacturing precision
If complex mode door linkages are used to achieve precise airflow control, then airflow distribution precision is improved, but device complexity and noise increase
Solution Approach 1:
The patent replaces complex mechanical linkage systems with electrical actuators and electronic control. Instead of using intricate mechanical linkages to achieve precise door positioning, the system uses electric motors with feedback control, eliminating the need for complex mechanical transmission mechanisms and reducing both device complexity and operational noise.
Solution Approach 2:
The system implements feedback control where airflow sensors continuously measure actual airflow at each outlet and feed this information back to the control module. The control module compares measured airflow with desired airflow and adjusts actuator positions accordingly, achieving precise airflow distribution through closed-loop control rather than complex mechanical linkages.
3Device complexity
If predetermined airflow settings are used, then device complexity is reduced, but user comfort and customization are limited
Solution Approach 1:
The system enables self-service by allowing users to directly control airflow distribution to their preference. Through the user interface, occupants can independently adjust airflow at different outlets without requiring manual intervention from service personnel or complex mechanical adjustments, making the system adaptive to individual comfort needs while maintaining simple control architecture.
Data Source
AI summary
A heating, ventilation, and air conditioning (HVAC) system. An HVAC unit of the system includes a heater core, an evaporator, a plurality of mode doors that control airflow from the HVAC unit, and one or more actuators, each one of the one or more actuators moves one or more of the plurality of mode doors. A plurality of airflow sensors are each associated with a different one of a plurality of air duct outlets through which airflow from the HVAC unit flows. The plurality of airflow sensors measure airflow through each one of the plurality of air duct outlets. A control module determines airflow amount through each one of the plurality of air duct outlets based on inputs received from the sensors, and moves one or more of the plurality of mode doors until airflow amount measured by the plurality of airflow sensors is at least substantially equal to a requested airflow distribution pattern.