Ventilated Seat Shell Surface for Cleanable Chair Seating
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Solution Overview
Problem
Existing seat shells for seating furniture lack effective ventilation and are prone to dirt accumulation and cleaning difficulties, especially in environments with high hygiene requirements like schools.
Innovation Solution
A seat shell design featuring a shell top with a substantially closed surface and surface structure comprising air passage channels formed by indentations, which maintain air circulation and prevent dirt entry, while allowing easy cleaning and ergonomic support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If openings are provided on the seat surface to enable air circulation, then ventilation effect is improved, but dirt and liquids can enter the cavity and clog the openings
Solution Approach 1:
The harmful function of openings (allowing dirt entry) is extracted and eliminated. The patent replaces traditional openings with a closed shell top that has integrated surface channels, removing the vulnerability to dirt accumulation while preserving ventilation functionality through the channel structure.
Solution Approach 2:
The shell top surface is given differentiated local quality with integrated channels that have specific geometric properties (width, depth, orientation) optimized for air flow. The channels are designed with smooth transitions and rounded edges to maintain ventilation while preventing dirt entrapment, creating local zones with different functional characteristics across the surface.
2Temperature
If traditional openings are used for ventilation, then air exchange is enabled, but cleaning the interior becomes difficult or impossible
Solution Approach 1:
The cleaning problem is solved by eliminating the cavity-accessing openings entirely. The closed shell top design with integrated surface channels removes the interior cleaning accessibility issue while maintaining ventilation through the external channel structure alone.
Solution Approach 2:
The channel structure is designed to be self-cleaning through its geometric properties. The smooth transitions, rounded edges, and appropriate width-to-depth ratios allow water and dirt to be easily rinsed off the surface without penetrating into the cavity, making the structure inherently easy to clean.
3Ease of manufacture
If the shell top surface is made smooth for easy cleaning, then hygiene is improved, but ventilation effect is reduced
Solution Approach 1:
The shell top surface combines smooth overall finish for easy cleaning with localized channel structures that provide ventilation. The channels have smooth internal surfaces that are easy to clean while their three-dimensional geometry (depth, width, orientation) creates effective air flow paths, achieving both hygiene and ventilation goals simultaneously.
Solution Approach 2:
Ventilation is achieved by moving from a two-dimensional surface opening concept to a three-dimensional channel structure. The channels extend into the shell top thickness, creating volumetric air flow paths that provide effective ventilation while maintaining a smooth external surface that is easy to clean.
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 ensures improved ventilation and hygiene by maintaining air circulation and preventing dirt entry, while being easy to clean and providing ergonomic support, enhancing comfort and hygiene in seating environments.
Implementation Method 1
air circulation or air exchange is prevented or at least made more difficult
Implementation Method 2
achieve a certain ventilation effect and thus reduce perspiration in the user
Data Source
AI summary
The invention relates to a seat shell for seating furniture, in particular chairs, which comprises a top shell side and a bottom shell side, wherein the top shell side has a substantially closed surface. The surface of the top shell side has a surface structure having a plurality of recesses, which cross each other and form ventilation channels.