Ventilation Fan Module in Center-Seal Window Rebate
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Solution Overview
Problem
Existing forced-ventilated windows with center seal systems face challenges in reliably limiting air flow when a defined pressure difference between the weather-side and room-side rebate areas is exceeded, and these solutions often require aesthetically disturbing fixtures or are not universally applicable.
Innovation Solution
A fan module is inserted into the reinforcement chamber, featuring a fan flap that opens to allow ventilation between the rebate areas and closes by gravity when pressure differences increase, using a center seal that seamlessly connects to the frame or sash profile, and includes locking mechanisms to secure the flap in various positions, ensuring high air exchange with minimal visual disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pivotally mounted flap is used to limit airflow when pressure difference is exceeded, then airflow limitation is achieved, but the device becomes aesthetically displeasing due to large visible volume in the rebate area
Solution Approach 1:
The airflow limitation function is extracted from the visible rebate area and relocated to the reinforcement chamber. The fan module with its flap mechanism is positioned inside the reinforcement chamber, removing the aesthetic disturbance from the rebate area while maintaining the airflow limitation function.
Solution Approach 2:
The fan module with airflow limitation mechanism is nested within the reinforcement chamber. This allows the limitation device to be housed inside the existing structure without adding visible volume to the rebate area, resolving the aesthetic contradiction.
2Object-affected harmful factors
If air is directed through a ventilation chamber in front of the reinforcement chamber, then condensation in the reinforcement chamber is prevented, but the solution is only applicable to profile systems with such a ventilation chamber
Solution Approach 1:
The fan module serves multiple functions: it provides airflow limitation when pressure difference is exceeded, enables forced ventilation through the central gasket system, and prevents condensation in the reinforcement chamber by directing air through it. This multi-functionality makes the solution universally applicable to various profile systems regardless of whether they have a separate ventilation chamber.
Solution Approach 2:
The ventilation function and reinforcement chamber are merged. The fan module directs air through the reinforcement chamber itself, eliminating the need for a separate ventilation chamber and making the solution applicable to all profile systems with a reinforcement chamber.
3Shape
If the fan module is inserted into the reinforcement chamber, then aesthetic appearance is improved, but installation complexity increases
Solution Approach 1:
The fan module is designed as a separate, self-contained unit that can be independently manufactured and then inserted into the reinforcement chamber. This segmentation allows for easier manufacturing and installation compared to integrating the mechanism directly into the profile system.
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 enables high air exchange volumes with low pressure differences without aesthetically disrupting the rebate area, prevents condensation in the reinforcement chamber, and is universally applicable to center sealing systems, ensuring reliable air flow regulation.
Implementation Method 1
a fan flap that opens to allow ventilation between the rebate areas and closes by gravity when pressure differences increase
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
To enable high air exchange rates in center-seal systems without disruptive components in the rebate area, a forced-ventilation window or door is proposed, comprising a frame formed from frame profiles (1), a sash formed from sash profiles (2), a rebate area (13) extending between the frame and sash, a center seal (3) that divides the rebate area (13) into a weather-side (14) and a room-side rebate area (15), wherein air is directed through the weather-side (14) and the room-side rebate area (15), and means for automatically limiting the air volume when a defined pressure difference between the weather-side (14) and the room-side rebate area (15) is exceeded, wherein the frame profiles (1) and/or the sash profiles (2) have at least one hollow chamber (10) which is connected to the weather-side (14) and the room-side rebate area (15) via a wall (11). The fold area (15) is adjacent.The wall (11) of the hollow chamber (10) adjacent to the weather-side (14) and the room-side rebate area (15) has a perforation (9) into which a fan module (20) is inserted, wherein the fan module (20) has a fan housing (21) that is at least largely sealed against the hollow chamber (10) and openings (inlet slots 27, outlet slots 28) which allow air to be directed through the fan module (20) between the weather-side (14) and the room-side rebate area (15).