Front Defroster Nozzle Segmented Airflow for HUD Clearance
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Solution Overview
Problem
Conventional front defroster nozzle devices face challenges in maintaining effective defrosting performance when compacted to avoid interference with head-up display devices, leading to complex designs and reduced air distribution efficiency across the windshield.
Innovation Solution
A front defroster nozzle device with a narrow blow opening divided into sections, where one section directs air to the left and right end portions and another to the central portion of the windshield, with the rear section blowing a larger volume of air per unit time to ensure even coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the blow opening is shortened to avoid interference with head-up display device, then the device complexity is reduced, but the defrosting performance deteriorates due to difficulty in sending air over entire windshield surface
Solution Approach 1:
The blow opening is divided into multiple sections along the vehicle width direction, with each section having a dedicated air channel connected to the blower. This segmentation allows the system to maintain effective defrosting coverage across the entire windshield surface even when the overall blow opening length is reduced, as each section can independently direct air to its corresponding windshield region.
2Reliability
If multiple separate blow openings are created to cover entire windshield, then the defrosting performance is improved, but the device complexity increases with separate channels and molding steps
Solution Approach 1:
Multiple air channels that would traditionally be separate components are merged into a single integrated channel structure formed within one molding process. The channel division portion creates internal separations within the unified channel body, allowing multiple air flow paths to coexist in a single component rather than requiring multiple separate channels to be assembled together.
Solution Approach 2:
The single channel structure performs multiple functions by incorporating division portions that create separate air flow paths within one unified component. This multi-functional design allows the channel to simultaneously serve as both a structural support element and a multi-path air distribution system, eliminating the need for separate channels for each blow opening section.
3Reliability
If the blow opening is extended to cover entire windshield surface, then the defrosting performance is improved, but the interference with head-up display device installation occurs
Solution Approach 1:
The blow opening is segmented into multiple sections along the vehicle width direction, with each section corresponding to a specific windshield region. This segmentation allows the overall blow opening length to be reduced to avoid head-up display device installation interference, while each individual section maintains sufficient length to effectively defrost its designated windshield area.
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
This configuration allows for efficient air distribution across the entire windshield, maintaining defrosting performance comparable to conventional designs while coexisting with head-up display devices.
Implementation Method 1
a current of air from this front defroster nozzle... sending a current of air from this front defroster nozzle
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
A defrosting performance identical to that in a conventional front defroster nozzle device is exhibited by a simpler structure even in the case of decreasing the overall length of a front defroster nozzle device in the direction of vehicle width. A current of air from a front blow-opening 12 formed on the same side as a windshield 200 is mainly sent to the left and right end portions of the windshield 200 and a current of air from a rear blow-opening 13 adjacent to the front blow-opening 12 and formed further inside the vehicle interior than the front blow-opening 12 is mainly sent to the central portion of the windshield 200. Accordingly, currents of air are inhibited from interfering with each other.