Adjustable Wind Driven Rain Louver Blade
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Solution Overview
Problem
Existing louver assemblies in HVAC systems fail to adequately block solid and liquid particles while maintaining desirable air flow rates, leading to increased pressure drops and reduced system efficiency.
Innovation Solution
The louver assembly features adjustable blades with movable segments that transition between configurations to block particles during inclement weather and enhance airflow during calm conditions, utilizing geometric features and seals to manage particle flow and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If louver blades are designed to block solid and liquid particles, then particle blockage performance is improved, but air flow rate decreases
Solution Approach 1:
The louver blade includes a movable second segment that can dynamically adjust its position between a first position (blocking particles) and a second position (allowing airflow). This dynamic configuration resolves the contradiction by enabling the blade to adapt its blocking capability based on operational conditions, achieving both particle blockage and airflow at different times.
Solution Approach 2:
The louver blade is divided into multiple segments (first segment and second segment), where the second segment can move independently relative to the first segment. This segmentation allows the blade to perform dual functions: blocking particles when the second segment is in the first position, and allowing airflow when in the second position, thus resolving the contradiction between particle blockage and airflow rate.
2Object-affected harmful factors
If louver blades block particles during inclement weather, then particle protection is improved, but pressure drop increases
Solution Approach 1:
The movable second segment dynamically adjusts to block particles only when necessary (inclement weather conditions), rather than maintaining a constant blocked position. This reduces the time-averaged pressure drop while still providing particle protection when needed, resolving the contradiction between particle protection and pressure drop.
3Reliability
If louver assembly increases blockage of elements, then particle blocking is improved, but desired air flow is reduced
Solution Approach 1:
The louver blade's second segment transitions between positions to provide element blockage only when required, maintaining desired air flow during normal conditions. This dynamic adjustment resolves the contradiction by achieving both high blockage capability and high airflow capability at different operational states.
Solution Approach 2:
By segmenting the louver blade into movable and fixed portions, the design enables selective blocking of elements while maintaining open airflow paths when blocking is not required, thus resolving the contradiction between element blockage and air flow productivity.
Data Source
AI summary
A louver blade for a louver assembly includes a first segment and a second segment, where the second segment is adjustable relative to the first segment to selectively contact the first segment, the second segment is configured to reduce an amount of free area between adjacent louver blades of the louver assembly in a first position of the second segment, and the second segment is configured to increase the amount of free area between adjacent louver blades of the louver assembly in a second position of the second segment.