Ventilation arrangement and device having a ventilation arrangement
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Solution Overview
Problem
Existing ventilation arrangements for housings are not universally installable, as they are effective only in specific positions, leading to the risk of foreign bodies penetrating the ventilation channel, and require multiple configurations and costly inventory management.
Innovation Solution
A ventilation arrangement with a ventilation channel that widens or narrows at the mouth opening, featuring a shielding hood with an annular gap to deflect fluids and prevent foreign matter entry, allowing for fluid exchange while minimizing resistance and ensuring protection across various installation positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shielding hood is used to protect the mouth opening, then protection against foreign bodies is improved, but installation versatility deteriorates due to position-specific effectiveness
Solution Approach 1:
The shielding hood is designed with a rotationally symmetrical annular gap that provides effective foreign body protection in all installation positions (vertical, horizontal, inclined). The radial extension of the shielding hood creates a universal protective barrier that functions independently of orientation, eliminating the need for position-specific configurations.
2Ease of manufacture
If the ventilation channel has a uniform cross section, then manufacturing is simplified, but fluid flow control deteriorates
Solution Approach 1:
The ventilation channel features a localized cross-sectional change at the mouth opening region, transitioning from a uniform cross section in the main body to a modified cross section near the opening. This local modification optimizes fluid flow acceleration and distribution without complicating the overall manufacturing process, as only a specific region requires dimensional variation.
3Reliability
If the shielding hood completely covers the mouth opening, then foreign body protection is improved, but fluid exchange deteriorates due to blocked flow paths
Solution Approach 1:
The shielding hood incorporates an annular gap that segments the continuous coverage, creating discrete flow paths for fluid exchange while maintaining protective coverage. The gap is positioned radially to allow fluid passage while the remaining portions of the shielding hood continue to block foreign bodies, achieving simultaneous protection and flow functionality.
Solution Approach 2:
The shielding hood extends radially outward from the ventilation channel in a direction perpendicular to the fluid flow axis, creating a three-dimensional protective structure. This radial extension provides foreign body protection in the radial direction while the annular gap maintains axial fluid flow paths, utilizing different spatial dimensions for protection and flow functions.
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 enables universal installation, effective fluid circulation, and protection against foreign bodies, reducing assembly errors and inventory costs by using a rotationally symmetrical design with coaxial grooves and shielding hoods to deflect and direct fluids efficiently.
Implementation Method 1
By means of a widening or narrowing, i.e., for example, a funnel-like or conical tapering of the ventilation channel, the flow in the region of the mouth opening can be influenced in respect of its flow speed or the distribution of the emerging or entering fluid. An acceleration or deceleration in the inlet or outlet direction of the mouth opening can thus be promoted or reduced as required.
Implementation Method 2
A gap, in particular an annular gap, is preferably formed between the first shielding hood and the ventilation channel and assists in a deflection of the fluids emerging from the ventilation opening or entering the ventilation opening to pass into the mouth opening. The deflection is intended to take place here by at least 180° with respect to a perpendicular of the mouth opening.
Data Source
AI summary
A ventilation arrangement has a ventilation channel with a mouth opening and a first shielding hood shielding the mouth opening. The ventilation channel widens and/or narrows in cross section towards the mouth opening. The mouth opening is encompassed by the first shielding hood, leaving free a gap.