Fabric air outlet device
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Solution Overview
Problem
Existing air conditioning elements made of woven or non-woven fabric face issues with air distribution, particularly at high air velocities near inlets, where air flows in undesirable directions, leading to inefficient distribution and potential drafts from single-direction airflow.
Innovation Solution
The air conditioning element features through holes with centerlines inclined at specific angles (60° to 89°) relative to the wall, ensuring that air flows radially or perpendicularly, with multiple arrays of holes directing airflow in various desirable directions, maintaining machine-washability and simplicity in design and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If through holes are provided with center lines perpendicular to the wall for simple design and manufacturing, then the design and manufacturing are simple, but the air flow direction becomes undesirable at high velocities
Solution Approach 1:
The patent changes the geometric parameters of the through holes by inclining their center lines at specific angles (60° to 89°) relative to the wall normal. This parameter modification allows the air flow to be directed radially outward while maintaining the simplicity of the textile-based structure, resolving the contradiction between manufacturing simplicity and air distribution efficiency.
2Device complexity
If through holes have center lines perpendicular to the wall, then the structure is simple, but air flows in single direction causing drafts
Solution Approach 1:
The patent applies local quality by varying the inclination angles of different arrays of through holes. The first array has holes inclined at angles of 60° to 89°, while the second array has holes inclined at different angles, creating multiple air flow directions from different portions of the element. This local variation in hole orientation eliminates drafts while preserving structural simplicity.
3Manufacturing precision
If through holes are small in size relative to wall thickness, then air flow direction can be controlled, but the manufacturing precision requirements increase
Solution Approach 1:
The patent establishes specific parameter relationships between hole size and wall thickness to achieve controllable air flow direction. By defining that the diameter of through holes should be small relative to the wall thickness, and by specifying inclination angles of 60° to 89°, the patent creates a manufacturable solution that balances precision requirements with ease of production using conventional textile manufacturing techniques.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively directs airflow perpendicular to the element's surface or in multiple directions, improving air distribution efficiency and preventing drafts, while maintaining the advantages of textile distribution systems.
Implementation Method 1
the centre line of each through hole intersects the inlet plane of the through hole at an angle alpha=60° through 89°
Data Source
AI summary
An air conditioning element of a woven or non-woven fabric includes a wall provided with at least a first array of through holes for distributing air, wherein the following relations apply to the through holes constituting the first array: the twofold value of the square root of the quotient between the value of the inlet area of a through hole and the value π is less than or equal to the value of the wall thickness of the element in the region adjacent to the through hole and the center line of the through hole intersects the inlet plane of the through hole at an angle α=60° through 89°, more preferably 80° through 88°, most preferably 83° through 87°.