Pressure-Adjustable Window Seal for Passive Vehicle Ventilation
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Solution Overview
Problem
Existing window seals in motor vehicles effectively seal against water and sound but prevent air exchange, leading to excessive heating when parked in sunlight, necessitating high air conditioning use and energy consumption.
Innovation Solution
A window seal with a cavity that can be adjusted by changing air pressure to create an air gap, combined with an air inlet mechanism, allowing passive ventilation by natural chimney effect without fans or blowers, using a controller to manage air pressure and inlet opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the window seal maintains full contact with the window pane for water-tight sealing, then water and sound protection is improved, but air exchange is prevented leading to excessive interior heating
Solution Approach 1:
The window seal incorporates a hollow chamber with a flexible wall that can dynamically change its configuration between a first configuration (providing full sealing contact) and a second configuration (creating air gap for ventilation). This dynamic adaptability allows the seal to switch between water-tight mode and ventilation mode based on operational requirements, resolving the contradiction between maintaining reliable sealing and enabling air exchange for temperature control.
Solution Approach 2:
The sealing characteristics of the window seal are changed by altering the air or gas pressure inside the hollow chamber. By controlling the pressure parameter, the flexible wall deforms to either contact the window pane fully (for sealing) or retract to create air gap (for ventilation), thus adjusting the sealing parameter to resolve the contradiction between water-tightness and air exchange.
2Reliability
If the window seal is pressed against the window pane for soundproofing, then sound protection is improved, but passive ventilation capability deteriorates
Solution Approach 1:
The window seal's flexible wall dynamically adjusts its position relative to the window pane. In the first configuration, it maintains full contact for optimal soundproofing. In the second configuration, it retracts to create an air gap that enables passive ventilation through the chimney effect, thus dynamically balancing soundproofing and ventilation efficiency.
Solution Approach 2:
The sealing pressure and contact state of the window seal are controlled by changing the air pressure in the hollow chamber. This parameter change allows the seal to transition between high-contact state (for soundproofing) and low-contact state (for ventilation), resolving the contradiction between sound protection and ventilation productivity.
3Ease of manufacture
If the window seal maintains constant cross-section for structural simplicity, then manufacturing ease is improved, but ventilation capability is lost
Solution Approach 1:
The window seal incorporates a hollow chamber with a flexible wall that enables dynamic cross-sectional change. The seal is manufactured as a single integrated component with the hollow chamber, maintaining manufacturing simplicity while gaining the versatility to switch between sealed and ventilated states through pressure-controlled deformation of the flexible wall.
Solution Approach 2:
The window seal is designed as a multi-functional component that can perform both sealing/waterproofing and ventilation functions. The hollow chamber structure with flexible wall allows the same component to adapt its cross-section for different operational modes, providing universality without requiring multiple separate components, thus maintaining ease of manufacture while enabling ventilation capability.
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
Reduces interior heating in parked vehicles, conserving energy by minimizing air conditioning needs and preventing unauthorized access or water entry, while maintaining effective sealing and soundproofing.
Implementation Method 1
the cross section of a window seal of at least one side window of the motor vehicle is decreased such that an air gap is formed between the window seal and a window pane of the side window
Implementation Method 2
This means that the vehicle is not moving and the engine of the motor vehicle, especially the ventilation or air conditioning system of the motor vehicle, is not in operation. The method thus provides a passive ventilation and venting of the interior of the motor vehicle without the use of fans or blowers. The method generates, by a natural 'chimney effect' an air flow from bottom to top through the motor vehicle
Data Source
AI summary
A window seal with ventilation function is provided and a method for the interior ventilation of motor vehicles is also provided.