Multi-Chamber Plastic Window Profiles for Ventilation and Sound Insulation
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Solution Overview
Problem
Existing windows with ventilation capabilities have a complex structure and inadequate sound insulation, particularly in tilt or turn-and-tilt configurations, necessitating optimization for improved thermal and soundproofing properties.
Innovation Solution
A window design featuring a frame and sash composed of multi-chamber plastic profiles with asymmetric partition walls, reinforced inserts if needed, and multiple sealing levels, including a central seal that divides the frame rebate space to facilitate ventilation while enhancing sound and thermal insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a window with ventilation capability is designed using conventional structures, then ventilation function is achieved, but the structure becomes complicated and sound insulation is inadequate
Solution Approach 1:
The patent combines the ventilation duct, sealing elements, and frame structure into an integrated design where the ventilation duct is formed directly within the frame profile. The sealing elements are incorporated into the same profile structure, eliminating the need for separate components and reducing overall structural complexity while maintaining ventilation functionality.
Solution Approach 2:
The frame profile is designed to serve multiple functions simultaneously: it provides structural support, contains the ventilation duct, incorporates sealing elements, and enables both closed and ventilated positions. This multi-functionality reduces the number of separate components needed and simplifies the overall window structure.
2Ease of operation
If a window with ventilation capability is designed using conventional structures, then ventilation function is achieved, but sound insulation is inadequate
Solution Approach 1:
The frame profile is divided into multiple hollow chambers separated by partition walls. This segmentation creates multiple air layers that act as sound insulation barriers while still allowing the ventilation duct to function. The partition walls divide the profile into distinct sections that improve acoustic performance.
Solution Approach 2:
The frame profile utilizes composite construction with multiple materials including plastic components and metal reinforcement inserts. This composite structure provides both the necessary mechanical strength and enhanced sound insulation properties, as different materials offer complementary acoustic benefits.
3Temperature
If plastic multi-chamber profiles are used for the frame, then thermal insulation and sound insulation are improved, but structural strength may be reduced
Solution Approach 1:
The plastic multi-chamber profiles are reinforced with metal inserts that provide the necessary structural strength. The composite construction combines the thermal insulation benefits of plastic with the mechanical strength of metal, achieving both thermal performance and structural integrity simultaneously.
4Object-affected harmful factors
If asymmetric partition walls with different thicknesses are used in the profile, then sound insulation is improved, but manufacturing complexity increases
Solution Approach 1:
The profile incorporates asymmetric partition walls with deliberately different thicknesses on opposite sides. This asymmetric design creates favorable acoustic conditions for sound insulation by disrupting sound wave patterns, while the overall profile geometry remains suitable for standard manufacturing processes.
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 design achieves high sound insulation values of over 32 dB and efficient air exchange, with a larger opening width for ventilation, using plastic profiles that reduce structural complexity and cost, while maintaining thermal efficiency and ease of assembly.
Implementation Method 1
Multiple hollow chambers are advantageous for sound insulation. This creates a favorable mass-spring-mass system, with the profile walls providing the mass and the air between the walls providing the spring. The more hollow chambers, the better the sound absorption.
Implementation Method 2
The connection points of the partition walls to other walls—e.g., one or more exterior walls—are then spaced at different distances from each other. Standing sound waves thus interfere destructively.
Implementation Method 3
frame profiles are used whose material has a thermal conductivity of less than 1.0 W/mK. This is also advantageous, as it contributes to good thermal insulation.
Data Source
Figure 1a
Figure 1b
Figure 2a~2b
AI summary
A window comprising at least the following features: a frame (1) composed of several frame profiles (1'), a sash (2) composed of several frame profiles (2') and comprising at least one surface element (3) which is movable relative to the frame (1) at least between a closed position and a ventilation position, wherein a circumferential frame rebate space (F) is formed between the frame profiles (1', 2') of the frame (1) and the sash (2), and at least one ventilation channel (8) formed in at least one of the frame profiles (1') of the frame (1) or in at least one of the frame profiles (2') of the sash (2), which has a first ventilation channel opening (9) and a second ventilation channel opening (10), wherein the sash (2) and the frame (1) are designed to close at least one of the ventilation channel openings (9, 10) in the closed position.and in the ventilation position to release both ventilation channel openings (9, 10) of the at least one ventilation channel (8), is characterized in that at least the at least one frame profile (1', 2') of the frame or sash in which the at least one ventilation channel (8) is formed is designed as a multi-chamber hollow profile, which consists entirely or substantially entirely of plastic, wherein in particular the walls adjacent to rooms (I; II) of the window are made of plastic.