Passive LED Light Ventilation via Tapered Nozzle Pressure Gradient
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ventilation systems for LED vehicle lights, particularly passive closed systems, are not very effective in managing humidity condensation, and active systems are complex and expensive.
Innovation Solution
A passive ventilation device with an air channel featuring an input opening, an output opening, and a bleed opening, where the bleed opening is positioned laterally in the nozzle section to direct bleed air out due to a pressure gradient, enhancing air circulation without the need for fans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a passive closed ventilation system is used, then dust protection is improved, but air circulation effectiveness deteriorates
Solution Approach 1:
The air channel includes a nozzle section with a tapered cross-section that creates dynamic pressure gradients during vehicle motion. The cross-section transitions from larger at the input opening to smaller at the output opening, generating a pressure gradient that drives air circulation passively without fans, while the bleed opening positioned in the nozzle section utilizes this pressure gradient to extract moisture-laden air effectively
Solution Approach 2:
The ventilation system changes the pressure parameter dynamically through the tapered nozzle geometry. The cross-sectional area variation along the air channel creates a pressure gradient that enhances air flow velocity and pressure differential, enabling effective moisture removal while maintaining a closed structure for dust protection
2Productivity
If an active ventilation system with fan is used, then air circulation effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The ventilation system utilizes the vehicle's own motion to generate the pressure gradients needed for air circulation. The tapered nozzle section converts kinetic energy from moving air into pressure differential, enabling the system to self-regulate moisture removal without external power sources or control mechanisms
Solution Approach 2:
The patent replaces the mechanical fan-based active ventilation system with a passive aerodynamic solution. The tapered nozzle geometry creates the necessary pressure gradients through fluid dynamics principles, eliminating the need for motors, fans, and associated control electronics
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 passive ventilation device improves air circulation within LED vehicle light modules, effectively managing humidity condensation and reducing the need for complex and costly active systems.
Implementation Method 1
the air channel comprises a nozzle section which comprises a tapered cross-section such that the cross-section is bigger coming from the input opening and getting smaller in direction to the output opening
Implementation Method 2
the nozzle section which comprises a tapered cross-section such that the cross-section is bigger coming from the input opening and getting smaller in direction to the output opening
Implementation Method 3
the bleed opening is positioned in the nozzle section, preferably laterally, sideward of the air channel and configured to direct bleed air through the bleed opening out of the device due to a pressure gradient between air in the nozzle section flowing through the air channel and air outside the device
Implementation Method 4
a passive ventilation device for a LED vehicle light module... improves air circulation within LED vehicle light modules, effectively managing humidity condensation
Data Source
Figure 1a~1c
Figure 2
AI summary
Ventilation device (1) for a LED vehicle light module (100), wherein the device (1) comprises an air channel (10) having an input opening (11), an output opening (12), and a bleed opening (13), wherein the air channel (10) comprises a nozzle section (14) which comprises a tapered cross-section such that the cross-section is bigger (14.1) coming from the input opening (11) and getting smaller (14.2) in direction to the output opening (12), wherein the bleed opening (13) is positioned in the nozzle section (14) and configured to direct bleed air through the bleed opening (13) out of the device (1) due to a pressure gradient between air in the nozzle section (14) flowing through the air channel (10) and air outside the device (1).