Ventilation Element Water Pooling Prevention
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Solution Overview
Problem
Ventilation elements for housing electrical or mechanical devices in vehicles face issues with water pooling due to capillary effects, leading to deterioration of ventilating characteristics and inadequate protection for filtering membranes.
Innovation Solution
A ventilation element with a rigid body housing a yielding material cylindrical portion and a hydrophobic membrane, where the membrane has a continuous free surface and slots between shoulders, maintaining a specific distance to prevent water pooling and ensure unobstructed air flow, and using an outer collar for secure insertion to keep the membrane at a predetermined distance from the closing part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ventilation element with a membrane and closing part is used to equalize pressure and protect against water ingress, then ventilation function and water protection are improved, but water pooling occurs due to capillary effects between the membrane and closing part
Solution Approach 1:
The patent extracts the harmful capillary effect by removing the closing part from direct contact with the membrane, eliminating the space where water pooling occurs. The closing part is positioned away from the membrane surface, preventing capillary action from drawing water between these components.
Solution Approach 2:
The patent introduces an intermediary air passage that allows ventilation function while preventing water accumulation. The passage geometry and positioning create a pathway for air flow that does not facilitate water pooling, acting as a mediator between the membrane and external environment.
2Object-affected harmful factors
If shoulders are positioned in front of slots to prevent water impact on membrane, then water protection is improved, but air flow passage is obstructed
Solution Approach 1:
The patent resolves the conflict by positioning shoulders laterally adjacent to slots rather than in front of them, utilizing a different spatial arrangement. This dimensional repositioning allows both water protection and air flow to coexist without obstruction.
Solution Approach 2:
The patent applies different functional properties to different locations: the shoulders provide water protection at specific lateral positions, while the slots maintain open pathways for air flow. Each component is optimized for its local function without compromising the other.
3Strength
If a rigid body structure is used for ventilation element, then structural strength is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the ventilation element into separate functional components: a rigid body structure for strength, a flexible membrane for filtration, and a closing part for sealing. This segmentation allows each component to be manufactured independently using appropriate methods, reducing overall manufacturing complexity while maintaining structural integrity.
Solution Approach 2:
The patent employs composite construction combining rigid materials for the body structure and flexible materials for the membrane. This composite approach provides the necessary structural strength while allowing for simpler manufacturing of each material type according to its optimal processing method.
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
Prevents water pooling and ensures effective ventilation by maintaining a defined distance between the membrane and the closing part, enhancing the operational performance and durability of the ventilation element while being cost-effective and simple to manufacture.
Implementation Method 1
This pooling, which is due to a capillarity effect (or similar physical effect) causes deterioration of the ventilating characteristics
Implementation Method 2
A hydrophobic membrane may be associated with the inner body at one end of the latter within said covering member
Data Source
AI summary
An element for ventilation of a housing containing an electrical, electronic, mechanical, electromechanical or similar device such as a motor vehicle headlamp, including a rigid body having an outer cylindrical wall, closed off at a first extremity by a closing part, the cylindrical wall open at a second extremity attached to the housing, the body including an inner member of an at least partly yielding material having a first extremity close to the closing part of the rigid body and bearing a filtering membrane, and a second open extremity facing the housing; between the filtering membrane or the first extremity of the inner member and the closing part of the rigid body there is a distance of between 1 and 4 mm, securer for securing insertion of the inner member within the rigid body provided to allow the distance to be automatically maintained at time of insertion.