Automatic Airflow Balancing Valve for In-Situ HVAC Adjustment
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Solution Overview
Problem
Conventional HVAC systems require labor-intensive manual adjustments to balance airflow, which is inefficient and costly due to the need for precise calibration and adaptation to changing conditions such as duct pressure and user interaction.
Innovation Solution
An automatic airflow balancing valve with an adjustable mechanism that allows in-situ adjustment of airflow without accessing the valve's housing, featuring a rotary damper and visual indicators for easy calibration, enabling universal adaptation to various flow rates and sizes, and an anti-microbial coating for enhanced safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment mechanisms are used in conventional airflow regulating devices, then airflow volume can be set, but the balancing procedure becomes labor-intensive and costly
Solution Approach 1:
The system performs self-balancing by automatically sensing airflow conditions and adjusting damper positions without requiring manual intervention. The controller receives signals from airflow sensors and actuates dampers to achieve balanced airflow distribution across all zones, eliminating the need for labor-intensive manual balancing procedures
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated control system that uses electronic sensors, controllers, and motorized actuators. The system electronically monitors airflow conditions and automatically adjusts dampers, substituting the manual mechanical balancing process with an automated electromechanical system
2Reliability
If manual balancing procedures are performed, then airflow distribution can be optimized, but the process does not accommodate changing conditions such as duct pressure and filter loading
Solution Approach 1:
The system continuously monitors airflow conditions using sensors in each zone and feeds this information back to the controller. The controller automatically adjusts damper positions based on real-time feedback, enabling the system to adapt to changing conditions such as duct pressure variations, filter loading, and seasonal changes, thereby maintaining reliable airflow balance
Solution Approach 2:
The patent transitions from static manual balancing to dynamic automated balancing. The system continuously adapts damper positions based on real-time airflow conditions, allowing the airflow distribution to dynamically respond to changing system conditions rather than remaining fixed at initial manual settings
3Ease of manufacture
If conventional manual dampers are installed throughout the building, then airflow regulation is achieved, but the deployment cost increases due to high labor requirements
Solution Approach 1:
The system automatically performs the balancing function that would otherwise require extensive manual labor. By installing sensors and controllers that enable self-balancing, the deployment process is simplified - the system balances itself automatically after installation, dramatically reducing the time and labor costs associated with conventional manual balancing procedures
Data Source
AI summary
An automatic airflow balancing valve, including: a housing having an inlet and an outlet and defining a flow path therethrough; a valve disc operatively connected to the housing and disposed within the flow path; and an airflow volume calibrating assembly disposed in the flow path and operatively connected to the valve disc and the housing to pivot the valve disc to a home position associated with a desired constant airflow volume. The airflow volume calibrating assembly may include an adjustment element that extends toward at least one of the inlet or the outlet.