Construction with rear ventilated facade elements
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Solution Overview
Problem
Existing rear-ventilated facade constructions face challenges with precise alignment, corrosion protection, and effective liquid ingress prevention, particularly during cleaning and vapor diffusion, leading to inefficiencies and potential damage.
Innovation Solution
Incorporating labyrinth seal-like splash guards in the upper and lower frame leg profiles, which connect to the frame limb profiles below the ventilation openings and extend towards the facade front, providing enhanced protection against liquid ingress and facilitating vapor diffusion while maintaining rear ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If punctiform attachment is used to fasten facade elements to the supporting structure, then the construction is simpler to manufacture, but considerable alignment work is necessary due to dimensional deviations accumulating during assembly
Solution Approach 1:
The frame is divided into multiple adjustable connection points along its length, allowing each segment to be independently positioned. This segmentation enables the frame to accommodate dimensional deviations in both the supporting structure and building wall while maintaining precise alignment of facade elements.
Solution Approach 2:
The connection system incorporates adjustable parameters such as movable clamps or sliding mechanisms that can be positioned at different locations along the frame. This adjustability allows compensation for dimensional variations without requiring precise pre-alignment, thus simplifying manufacture while maintaining installation precision.
2Reliability
If conventional ventilation openings are provided in the frame profiles, then rear ventilation is achieved, but liquid ingress such as driving rain and cleaning water can penetrate into the rear ventilation area
Solution Approach 1:
A splash guard is introduced as an intermediary element between the ventilation opening and the rear ventilation area. This splash guard allows air to pass through while blocking liquid penetration, thus maintaining the ventilation function while protecting against harmful liquid ingress.
Solution Approach 2:
The splash guard functions as a thin barrier structure that selectively permits gas molecules to pass while blocking liquid droplets. Its design allows it to maintain ventilation effectiveness while providing liquid protection through its specific geometric configuration.
3Object-affected harmful factors
If the labyrinth seal-like splash guard is added to the frame profile, then protection against liquid ingress is improved, but the device complexity increases
Solution Approach 1:
The splash guard is merged with the existing frame profile structure, forming an integrated component rather than a separate addition. This combining approach provides enhanced liquid protection while minimizing the increase in overall device complexity by utilizing the existing structural framework.
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 effectively prevents liquid penetration into the rear ventilation area, ensuring improved protection against driving rain and high-pressure cleaning, while allowing vapor diffusion and enhancing fire protection by decoupling adjacent facade elements, thus simplifying assembly and reducing maintenance efforts.
Implementation Method 1
at least the upper frame limb profile interior is assigned a labyrinth seal-like splash guard, which connects to the frame limb profile below the ventilation openings, covers the ventilation openings and has its free end pointing towards the facade front
Implementation Method 2
Both the upper and the lower frame leg profile 5, 6 of the frame 3 have ventilation openings 8 opening out to the facade front 7
Data Source
Figure 1
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AI summary
A structural design with rear-ventilated cladding elements (1), in particular plates or boards which can be hung in front of a supporting framework (2), in particular consisting of vertical support elements and horizontal bearing elements, is proposed, wherein the cladding elements are each assigned a frame (3) which spans a rear-ventilation cross section (4) and the upper and lower frame leg profiles (5, 6) of which have ventilation openings (8) leading to the front of the cladding (7). In order to provide advantageous rear-ventilation conditions, it is proposed that at least the upper frame leg profile interior (12) is assigned a splash guard (13) which is in the form of a labyrinth seal, adjoins the frame leg profile below the ventilation openings (8), covers the ventilation openings (8) and preferably points with the free end thereof towards the front of the cladding (7).