Headlight Cooling Duct Partitioning for Airflow Distribution
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Solution Overview
Problem
Existing headlamp cooling systems for motor vehicles face inefficiencies in air flow distribution due to limited outlets and complex, costly duct designs, which can lead to pressure drops and size constraints.
Innovation Solution
A headlamp cooling system featuring an air duct with an added wall that separates the air flow into multiple streams, allowing for efficient distribution and controlled flow rates, utilizing a duct made of plastic material with hollow parts that can be assembled to form a passage with multiple outlets, enhancing production efficiency and simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional duct branches are used to distribute airflow, then the duct can cool multiple light modules, but the number of outlets is limited and flow distribution is not fully controlled
Solution Approach 1:
The duct is segmented into multiple hollow parts that can be assembled together, with partition walls creating separate fluid channels within each hollow part. This segmentation allows multiple outlets to be achieved while keeping each component relatively simple in structure.
Solution Approach 2:
The partition walls are arranged in different orientations (some parallel to the duct axis, others perpendicular) to create three-dimensional fluid channel networks. This multi-dimensional arrangement maximizes the number of outlets without increasing linear duct length excessively.
2Manufacturing precision
If conventional duct branches are used to distribute airflow, then the duct can cool multiple light modules, but flow distribution is not fully controlled and head loss occurs
Solution Approach 1:
Each fluid channel is designed with specific local characteristics - partition walls are positioned at particular locations and angles to create optimized flow paths. The channel cross-sections and lengths are locally adjusted to balance flow distribution, preventing head loss in any single branch while maintaining overall system performance.
3Adaptability or versatility
If a bulky and complex duct shape is used, then multiple outlets can be achieved, but production cost increases
Solution Approach 1:
The duct is divided into multiple hollow parts that can be manufactured separately using standard plastic injection molding techniques, then assembled together. This segmentation allows each component to be produced efficiently with conventional manufacturing processes, reducing overall production cost while achieving multiple outlets through the assembled configuration.
Solution Approach 2:
Multiple hollow parts are merged through assembly to form the complete duct structure with multiple outlets. The partition walls are integrated into these hollow parts, combining the functions of structural support and flow distribution in a single manufacturing step for each component.
4Ease of manufacture
If the duct extends in a plane with added walls at small angles, then production is simplified, but space constraints may be violated
Solution Approach 1:
While the duct generally extends in a plane for manufacturing simplicity, partition walls are strategically oriented at small angles (less than 15°) relative to this plane. This subtle three-dimensional arrangement creates the necessary internal volume and fluid channel separation without significantly increasing the overall external dimensions of the duct.
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 efficient and economical production of a duct that optimally separates fluid streams, ensuring controlled distribution of cooling air to multiple outlets, reducing production costs and improving airflow distribution without the constraints of traditional designs.
Implementation Method 1
the duct includes at least one added partition wall separating the passage... the added wall(s) are configured to divide the airflow, preferably at the inlet of said duct, into at least two separate streams leading to different outlets
Implementation Method 2
at least one airflow inlet from one or more fans... a cooling air duct for the light modules, with at least one airflow inlet from one or more fans
Implementation Method 3
These light sources are indeed very small for their high light output. They are usually mounted on a printed circuit board and are often thermally coupled to one or more heat sinks
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a headlight, particularly for motor vehicles, comprising several light modules (6) and a cooling air duct (8; 108) for the light modules (6), with at least one air inlet (1161, 1162) for one or more fans (10, 12; 110), several air outlets (1201, 1202, 1203, 1204) to the light modules (6), and a passage (1221, 1222, 1223, 1224) connecting the inlet(s) (1161, 1162) with the outlets (1201, 1202, 1203, 1204). The duct (8; 108) includes at least one partition (124) separating the passage.