Window Insert Ventilation and Drainage Design

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Solution Overview

Problem

Wood-aluminium windows face issues with condensation accumulation due to thermal property differences between wood and aluminum, leading to moisture damage and requiring drainage into the building's substructure, and the need for blocking the glazing for proper installation, which restricts ventilation.

Innovation Solution

The solution involves creating openings in the aluminum profile strip for ventilation and drainage, allowing condensate to escape externally, and gluing the glazing to the window sash without the need for blocking, using silicone adhesive for secure bonding and load-bearing capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If glazing blocks are used to secure the glazing in the window frame, then the glazing can be properly installed and supported, but the rebate space ventilation is blocked and moisture accumulation occurs

Engineering Contradiction:

Improveglazing installation securityVSAvoidmoisture accumulation in rebate space

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention removes glazing blocks from the rebate space entirely. Instead, the glazing is bonded directly to the window frame using adhesive applied to the glazing edges, eliminating the physical obstruction that blocked ventilation while maintaining secure glazing support

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The mechanical support system using glazing blocks is replaced with a chemical bonding system using adhesive. The adhesive provides both structural support and allows continuous air flow through the rebate space, solving both the support and ventilation requirements simultaneously

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Shape

If the aluminum profile strip is tightly fitted to the window frame, then a clean external appearance is achieved, but condensation cannot drain and moisture damage occurs

Engineering Contradiction:

Improveexternal appearance cleanlinessVSAvoidcondensate accumulation

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The aluminum profile strip is segmented with drainage openings at the bottom. These openings allow the profile to maintain its clean external appearance from above while providing drainage pathways below for condensate to escape, separating the aesthetic function from the drainage function

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The aluminum profile strip has different properties at different locations: the upper and side portions are solid and smooth for aesthetic purposes, while the lower portion contains drainage openings. This local differentiation allows the same component to fulfill both appearance and drainage functions

Inventive Principle:

Principle #3Local quality

3Ease of operation

If glazing blocks are used to create a gap for ventilation, then air circulation is possible, but the ventilation is not permanent and condensation still accumulates

Engineering Contradiction:

Improverebate space ventilationVSAvoidpermanent ventilation effectiveness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The drainage openings are built into the aluminum profile strip structure itself before installation. This preliminary incorporation of drainage functionality ensures that ventilation and condensate drainage are permanently enabled, rather than relying on temporary or removable elements like glazing blocks

Inventive Principle:

Principle #10Preliminary action

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 design ensures effective ventilation and drainage of the intermediate space, prevents moisture damage, and allows for secure glazing fastening without blocking, maintaining rebate ventilation and structural integrity.

Implementation Method 1

A silicone adhesive is particularly suitable for this type of bonding. This bonding also stiffens the frame of the window sash

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Implementation Method 2

These openings allow condensation from the space between the window frame and the profile strip to escape to the outside

Methodology Applied

Scientific EffectGravitational drainage: Gravitation

Implementation Method 3

spacers are arranged between the at least one profile strip and the window frame, wherein the spacers abut on one side the profile strip and on the other side the window frame

Methodology Applied

Scientific EffectNatural convection: Convection

Data Source

PatentEP3647528B1Window insert for a building opening and building

Publication Date: 2021.06.23 EISENBACH HEINZ

Figure 1
Figure 2

AI summary

The invention relates to a window (1) for installation in a building opening, comprising at least: a window frame (2), at least one profile strip (4) which is arranged circumferentially on the outside of the window (1) on the window frame (2), at least one window sash with a frame (3) into which a glazing (6) is inserted, wherein the at least one profile strip (4) has at least one opening (9) in a lower area of the window (1) through which ventilation and/or drainage of an intermediate space (12) between the window frame (2) and the at least one profile strip (4) to the outside of the window (1) is possible, and the glazing (6) is bonded to the frame (3) of the at least one window sash in such a way that no glazing blocks are necessary.The invention further relates to a building with at least one building opening for the insertion of a window, wherein the window is designed as a window according to the invention°(1).