Elastic Damping Element for Window Sash Sound Insulation
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Solution Overview
Problem
Existing window and door systems with non-positive connections between facing shells and hollow chamber profiles are limited in size due to the need for thick, heavy glass panes for sound insulation, restricting the size of window and door elements.
Innovation Solution
Incorporating an elastic damping element between the facing shell and the weather-side outer wall of the window or door profile, which absorbs sound waves and contributes to sound insulation, allowing for the use of lighter insulating glass panes and enabling the construction of larger window and door elements with equivalent sound insulation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick and heavy glass panes are used for sound insulation, then sound insulation properties are improved, but the size of window and door elements is limited
Solution Approach 1:
The patent combines multiple materials with different sound insulation properties (thick glass panes, elastic damping element, hollow chamber profile) to create a composite structure. This composite approach allows achieving the required sound insulation (Rw≥30 dB) while reducing the total mass compared to using only thick glass, thereby enabling larger window and door elements.
Solution Approach 2:
The patent changes the physical parameters of the sound insulation system by introducing an elastic damping element with specific material properties (density between 20-200 kg/m³, loss factor between 0.05-0.5). This parameter optimization allows reducing the mass of glass panes while maintaining sound insulation performance, enabling larger element sizes.
2Reliability
If thick and heavy glass panes are used for sound insulation, then sound insulation properties are improved, but the mass of the window or door element increases
Solution Approach 1:
The patent creates a composite sound insulation system combining glass panes (density 2000-2500 kg/m³) with an elastic damping element (density 20-200 kg/m³). The damping element absorbs sound energy through viscoelastic deformation, allowing reduction of glass pane mass while maintaining overall sound insulation performance (Rw≥30 dB).
Solution Approach 2:
The elastic damping element acts as an intermediary between the glass panes and the hollow chamber profile. It absorbs and dissipates sound energy through its viscoelastic properties, reducing the burden on glass panes to provide all sound insulation alone. This mediator enables using lighter glass while achieving the same overall sound insulation level.
3Shape
If facing shell is only connected to hollow chamber profile in non-positive manner, then appearance and weather resistance are improved, but structural contribution to sound insulation is insufficient
Solution Approach 1:
The patent uses a composite connection approach: the facing shell is non-positively connected to the hollow chamber profile for aesthetic and weather protection, while an elastic damping element provides positive mechanical connection and sound insulation. This multi-functional composite structure addresses both appearance requirements and sound insulation contribution.
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 elastic damping element enhances sound insulation properties and enables the production of larger window and door elements with reduced mass, improving the overall soundproofing capabilities while maintaining sound insulation standards.
Implementation Method 1
an elastic sash damping element that is at least partially arranged between a weather-side outer wall of the window or door sash profile and the sash shell... The elastic material can absorb sound waves and thus contribute significantly to the sound insulation properties of the entire component
Data Source
Figure 1
AI summary
The present invention relates to a window or door sash (1) comprising a sash frame (3) formed from sections of a window or door sash profile (2), wherein the window or door sash profile (2) has a sash rebate area (9) and a sash outer overlap (8); a surface element (12) received in the rebate area (9), which is preferably designed as insulating glazing (12); and a sash cover shell (15) at least partially covering the window or door sash profile (2); wherein the window or door sash (1) is characterized according to the invention in that it further comprises an elastic sash damping element (16) which is arranged at least partially between a weather-side outer wall (14) of the window or door sash profile (2) and the sash cover shell (15).Furthermore, the present invention relates to a frame (4) for receiving a window or door sash (1), which is formed from sections of a frame profile (5) having a frame rebate area (9') and a frame outer overlap (8'); wherein the frame (4) comprises a frame cover shell (20) that at least partially covers the frame profile (5); wherein the frame according to the invention is characterized in that it further comprises an elastic frame damping element (21) that is arranged at least partially between a weather-side outer wall (19) of the frame profile (5) and the frame cover shell (20).Finally, the present invention also relates to a window (100) or a door comprising a frame (4) and a window or door sash (1) received therein, wherein the window (100) or the door is characterized according to the invention in that the window or door sash (1) and/or the frame (4) is/are designed according to the present invention.