Roof Window Air Channel With Elastic Baffle Airflow Control
Solution Overview
Problem
Existing roof window designs with air supply channels fail to maintain optimal airflow rates under varying atmospheric conditions, particularly during heavy rainfall and strong winds, as they either require significant modifications or cannot accommodate different roof incline angles, leading to inefficient air flow and potential water mist issues.
Innovation Solution
A roof window with an air supply channel in the upper frame element featuring an elastic baffle that automatically adjusts airflow by deflecting in response to pressure differences, ensuring a constant optimal airflow rate through the use of spacers and reflexive elastic forces, while allowing manual adjustment via a venting grate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed air supply channel is used in the roof window, then the structure is simple and manufacturing is easy, but the airflow rate cannot be automatically adjusted under varying atmospheric conditions
Solution Approach 1:
The patent applies the dynamics principle by introducing a movable baffle element that can change position automatically in response to varying atmospheric conditions. The baffle is guided by profile elements that allow it to move along a defined path, transforming the static air channel into a dynamic system that adapts its geometry to maintain optimal airflow rates regardless of external pressure variations or weather conditions.
2Ease of operation
If the air channel outlet is made fully adjustable, then airflow can be controlled manually, but water mist from heavy rainfall can be carried into the room through the channel
Solution Approach 1:
The patent employs an intermediary element - the baffle - positioned within the air channel to mediate between the airflow function and water protection requirement. The baffle creates a separation effect where it allows air to pass through while blocking water droplets and mist from entering the room, thus decoupling the airflow control function from the water intrusion risk.
3Extent of automation
If a scoop with freely hanging baffle is installed on the window, then automatic airflow adjustment is achieved, but the device cannot be used in roof windows with various incline angles without manufacturing many types
Solution Approach 1:
The patent achieves universality by designing a guide profile system that can accommodate various roof incline angles with a single baffle type. The guide profile elements are configured to guide the baffle movement in a manner that maintains proper orientation and function regardless of the roof's angle, eliminating the need to manufacture multiple specialized baffles for different installation scenarios.
4Extent of automation
If the baffle is allowed to deflect freely under pressure difference, then automatic airflow regulation occurs, but the channel may close completely under strong wind conditions
Solution Approach 1:
The patent applies preliminary anti-action by pre-positioning guide profile elements that physically prevent the baffle from deflecting too far and completely blocking the air channel. These guide elements create a mechanical constraint that counteracts the full effect of strong pressure differences, ensuring that the channel remains partially open and maintains a minimum airflow rate even under extreme wind conditions.
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
The solution ensures a consistent and optimal airflow rate irrespective of atmospheric conditions, preventing complete channel closure and addressing issues of water mist and airflow variability, suitable for various roof incline angles without requiring extensive modifications.
Implementation Method 1
Air flow through the channel increases the pressure difference between the opposite sides of the baffle. When the force caused by the pressure difference exceeds the reflexive force of the baffle, the baffle departs from the fixing surface towards the opposite inner surface of the channel
Implementation Method 2
the baffle is set inside the channel so that due to the reflexive elastic force it always returns to its initial position
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Abstract A roof window consisting of a window frame /1/ and a sash /2/ turning about a horizontal axis, provided with an air supply channel /4/ with automatic flow rate adjustment of air flowing through the channel /4/, the channel /4/ being made inside an element of the window frame /1/, the means adjusting the automatic air flow rate being arranged inside the channel /4/ cut inside the window frame /1/, and the baffle /5/ set inside the channel /4/ being deflected by the flowing air and returning to its initial position by reflexive elastic force.