Vehicle Ventilation Flow Paths for Water Separation With Low Pressure Drop
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Solution Overview
Problem
Water ingress into vehicle ventilation systems leads to component damage, odour issues, health risks, and reduced efficiency due to increased pressure drop, compromising comfort and energy efficiency.
Innovation Solution
A ventilation arrangement with guide vane assemblies in the air-conducting housing that create flow paths with increasing cross-sectional areas, separating water from airflow while maintaining a low pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If specialised filters or deflectors are implemented to separate water from airflow, then water ingress is prevented, but pressure drop within the system increases
Solution Approach 1:
The patent changes the geometric parameters of the flow paths by implementing increasing effective cross-sectional area along the flow direction. This parameter change allows water separation without creating high resistance, as the expanding geometry gently redirects water droplets while maintaining airflow continuity, thus preventing both water ingress and excessive pressure drop
Solution Approach 2:
The ventilation system is segmented into multiple flow paths, each with controlled geometry. By dividing the airflow into separate paths with increasing cross-sectional areas, the system achieves water separation through distributed geometric guidance rather than concentrated filtering, reducing overall pressure drop while maintaining reliability
2Reliability
If filters are saturated with moisture, then water separation is maintained, but airflow performance decreases and fan workload increases
Solution Approach 1:
The patent extracts the water separation function from traditional filters and implements it through the geometric design of the flow paths themselves. The increasing cross-sectional area acts as a passive water separator that continuously functions without becoming saturated, maintaining both water separation capability and airflow performance without increasing fan workload
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 ingress, reduces component damage, minimizes odours and mould growth, enhances air quality, and improves energy efficiency by reducing mechanical strain on components.
Implementation Method 1
each of the number of flow paths has an increasing effective cross sectional area in a direction of the flow path... The increasing effective cross sectional area in the direction of the flow path results in a decreased air flow velocity along the flow path
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
Ventilation arrangement configured to generate an airflow into an occupant compartment of a vehicle, comprising an air-conducting housing comprising a first set of air inlets, an interior volume, an outlet (11), and a ventilation apparatus configured to deliver air from the outlet (11) of the air-conducting housing into the occupant compartment, wherein the air-conducting housing comprises a first guide vane assembly (5) in the interior volume forming a number of flow paths (p1-p6) each extending from at least one air inlet of the first set of air inlets to the outlet (11), and wherein each of the number of flow paths (p1-p6) has an increasing effective cross sectional area in a direction of the flow path (p1-p6).