Moisture-Responsive Ventilation Insert for Dynamic Airflow Control
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Solution Overview
Problem
Existing ventilation systems for textiles, shoes, and protective gear face challenges in balancing air exchange and water vapor dissipation while preventing water ingress, with current solutions either impeding air circulation or requiring manual protection, and materials like superabsorbents leading to weight gain and unpleasant textures.
Innovation Solution
A ventilation insert utilizing swellable materials like crosslinked sodium polyacrylate or shape-memory alloys that automatically close ventilation openings when wet or at low temperatures, reversing to open at higher temperatures, allowing for targeted ventilation and quick drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If special membranes or fiber layers are used to protect ventilation openings from water ingress, then water protection is improved, but air circulation is significantly impeded
Solution Approach 1:
The ventilation opening uses a dynamic cover element that can change its state between open and closed positions. The cover is connected via a hinge and can be moved by a displacement element (such as a balloon or cavity) that responds to environmental conditions like temperature or pressure changes, automatically adjusting ventilation without manual intervention while maintaining water protection when closed.
Solution Approach 2:
The invention employs a displacement element (balloon or cavity) that changes its volume or pressure in response to environmental parameter changes (temperature, pressure). This parameter change drives the cover element between open and closed states, enabling automatic ventilation control that balances air circulation needs with water protection requirements.
2Object-affected harmful factors
If manual closure options like zips or Velcro fasteners are used, then water protection can be achieved, but ease of operation deteriorates due to manual intervention requirements
Solution Approach 1:
The ventilation opening is equipped with a self-regulating mechanism where the cover element automatically opens or closes in response to environmental conditions. The displacement element (balloon or cavity) reacts to temperature or pressure changes, moving the cover without any manual intervention, thereby providing self-service water protection while maintaining ventilation functionality.
3Object-affected harmful factors
If fiber layers are used to cover openings, then water protection is improved, but air permeability deteriorates due to high density
Solution Approach 1:
Instead of using a static dense fiber layer that permanently blocks air flow, the invention employs a dynamic cover element that remains open during normal ventilation conditions. The cover only closes when environmental parameters trigger the displacement element, temporarily sealing the opening. This dynamic approach maintains high air permeability during ventilation while providing water protection when closed.
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 provides automatic and reversible control of ventilation openings, ensuring effective air exchange and water protection without manual intervention, maintaining wearing comfort and functionality while preventing water and cold air ingress.
Implementation Method 1
at least one liquid absorber (3) made from a swellable material is applied to the carrier layer (1)
Implementation Method 2
the fibers of textile surfaces are coated or impregnated with an elastomer (so-called superabsorbents), so that they swell when they come into contact with water
Implementation Method 3
Shape-memory alloys or thermoplastic-elastomer composites can be used as the material that changes its shape as a result of heat or electrical voltage
Implementation Method 4
If the supply of moisture is interrupted, the previously absorbed liquid evaporates, the volume of the vapor absorber is reduced and air can circulate through the ventilation insert again
Data Source
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AI summary
The invention relates to a ventilation insert for ventilating textiles, shoes and soles of shoes, gloves, protective helmets and their visors, protective goggles, insulating mats, cushioning mats, knee pads and shin pads, headgear and similar articles. The invention proposes a ventilation insert in which an open-pored support layer (1) is provided with an open-pored cover (1.1, 10) or individual covering elements (2) which are at least partly composed of a material (3) which undergoes a swelling or shrinking effect on account of moisture, heat or an electrical voltage, or a material (3) of this type is connected to the support layer (1), the cover (1.1, 10) and/or the covering elements (2) or constitutes the support layer or cover in such a way that ventilation openings (5, 12) in the support layer (1) and/or in the cover (1.1, 10) are exposed or closed on account of the swelling or shrinking effect.