Aerodynamic Device for Vehicle Window Demisting
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Solution Overview
Problem
Conventional motor vehicles experience prolonged misting issues, particularly at the rear window, which impairs visibility and passenger safety and comfort.
Innovation Solution
An aerodynamic device is integrated into the motor vehicle's interior compartment, designed to generate turbulence on the window surface when airflow impinges upon it, utilizing a turbulator or vortex generator, such as a pyramid-shaped structure, to enhance demisting by creating small vortices in the boundary layer, and can be arranged on the window or adjacent panels without contact, ensuring unobtrusive and aesthetically appealing installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional vehicles rely on natural airflow for window demisting, then the system remains simple and cost-effective, but the demisting process is prolonged and visibility is reduced
Solution Approach 1:
The patent introduces an aerodynamic device as an intermediary element between the airflow source and the window surface. This device mediates the interaction by generating turbulence that enhances heat and mass transfer, thereby accelerating demisting without requiring direct modification of the window or complex heating systems.
Solution Approach 2:
The invention utilizes pneumatic principles by manipulating airflow characteristics through the aerodynamic device. The device creates turbulent flow patterns that increase convective heat transfer and moisture removal from the window surface, leveraging fluid dynamics to solve the demisting problem.
2Reliability
If the aerodynamic device is adhesively bonded to the window, then it provides stable positioning and effective turbulence generation, but it obstructs the view and reduces aesthetic appeal
Solution Approach 1:
The aerodynamic device is constructed as a thin, flexible structure that can be positioned near the window without requiring adhesive bonding. This thin-film approach minimizes visual obstruction while maintaining sufficient structural integrity to generate the required turbulence effect.
Solution Approach 2:
The device is extracted from direct contact with the window surface, positioning it in the airflow path instead. This separation allows the window to maintain its transparency and aesthetic appearance while the aerodynamic device performs its function in the surrounding airflow field.
3Illumination intensity
If the aerodynamic device is positioned away from the window surface, then it maintains aesthetic appeal and unobstructed view, but it reduces the intensity of turbulence at the window surface
Solution Approach 1:
The aerodynamic device operates in a different spatial dimension relative to the window surface, positioned in the airflow path rather than directly on the surface. This dimensional separation allows it to generate turbulence that effectively reaches the window while maintaining aesthetic appearance.
Solution Approach 2:
The device leverages the dynamic characteristics of the airflow itself to generate turbulence, rather than requiring direct contact with the window. The turbulent flow patterns are created through the interaction between the aerodynamic device and the moving air, which then naturally reaches the window surface.
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 aerodynamic device accelerates the demisting process, improving visibility and safety by generating turbulence that aids in faster clearing of mist and ice from windows, particularly effective at the rear window, while maintaining an unobstructed view and allowing for targeted airflow assistance.
Implementation Method 1
generate turbulence at a surface, facing toward the interior compartment, of the window
Implementation Method 2
The aerodynamic device generates small vortices in the boundary layer with respect to the window
Implementation Method 3
The aerodynamic device generates small vortices in the boundary layer with respect to the window. The window can thus be more quickly demisted
Data Source
AI summary
A motor vehicle having an interior compartment which is at least partially enclosed by windows is provided. At least one windshield or one side window or one rear window is assigned an aerodynamic device which is designed to, when an air flow impinges on the aerodynamic device, generate turbulence at a surface, facing toward the interior compartment, of the window. The aerodynamic device is also provided.