Window Ventilation Duct Sliding Contact Strip Friction
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Solution Overview
Problem
Existing window designs with ventilation ducts face issues such as complex structure, high actuation forces for closing, poor sliding performance of the center seal on the insulating web, and limited opening width due to the short insulating bar of the sash frame.
Innovation Solution
A window design featuring a frame and sash frame composed of multiple profiles with a circumferential rebate space, a contact slide strip that optimally interacts with seals to reduce friction and force requirements, and a center seal that divides the rebate space for enhanced ventilation and sound insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a known window design with ventilation duct is used, then soundproofed ventilation is enabled, but the structure becomes relatively complicated
Solution Approach 1:
The patent integrates the ventilation duct directly into the frame profile, merging the ventilation function with the structural frame element. This eliminates the need for separate ventilation components and reduces overall structural complexity while maintaining soundproofed ventilation capability.
Solution Approach 2:
The frame profile is designed to serve multiple functions: it provides structural support, forms the circumferential rebate space, and incorporates the ventilation duct. This multi-functionality reduces the number of separate components needed, simplifying the overall structure.
2Ease of operation
If a known window design is used, then ventilation is possible, but relatively high operating forces are required to close the sash
Solution Approach 1:
The patent introduces a sliding contact strip as an intermediary element between the seal and the frame. This strip provides a optimized sliding surface that reduces friction and contact pressure, thereby lowering the operating forces required to move the sash while maintaining effective sealing.
Solution Approach 2:
The patent modifies the contact parameters by introducing a specifically designed sliding contact strip with optimized surface properties and geometry. This changes the friction and pressure characteristics of the seal-contact interface, reducing the force needed for operation.
3Ease of operation
If a known window design is used, then the sash can be closed, but the center seal slides rather poorly on the insulating web
Solution Approach 1:
The sliding contact strip acts as an intermediary between the center seal and the insulating web, providing a dedicated sliding surface that is optimized for seal movement. This intermediate element improves the sliding performance and reliability of the seal while maintaining the insulating function.
Solution Approach 2:
The patent applies a specialized sliding contact strip only in the specific area where the seal needs to slide, rather than modifying the entire insulating web. This localized solution provides optimal sliding performance where needed while maintaining the insulating properties elsewhere.
4Reliability
If a known window design is used, then the sash frame has an insulating web, but the opening width is relatively small
Solution Approach 1:
The patent moves the ventilation duct from being constrained by the insulating web dimensions to being integrated into the frame profile. This dimensional repositioning allows the opening width to be determined by the frame geometry rather than the insulating web length, enabling larger opening widths while maintaining insulation.
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 reduces operating forces, increases opening width, and achieves high sound insulation values with improved air exchange rates, allowing for efficient sound-insulated ventilation.
Implementation Method 1
at least one sealing plane is formed between the frame and the sash in the area of the frame rebate in the open state, which is formed by at least one seal which, at least in the ventilation position, bears against the frame or the sash with a sliding contact section
Data Source
Figure 1a
Figure 1b
Figure 2a~2b
AI summary
A window comprising at least the following features: - a frame (1), - a sash (2) 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 frame profiles (1', 2') of the sash (2), - at least one ventilation channel (8) which has a first ventilation channel opening (9) and a second ventilation channel opening (10), - wherein the sash (2) and the frame (1) are configured to close at least one of the ventilation channel openings (9, 10) in the closed position and to open both ventilation channel openings (9, 10) of the at least one ventilation channel (8) in the ventilation position, - wherein at least one sealing plane is formed between the frame (2) and the sash (1) in the area of the frame rebate space in the open state,which is formed by at least one seal (18, 104, 105) which, at least in the ventilation position, bears against the frame or the sash frame with a sliding contact section (23), is characterized in that the sliding contact section (23) bears against a sliding contact strip (24, 124) of the sash frame or the frame in the ventilation position, which is formed on the sash frame or the frame, in particular attached to it and projects into the rebate space.