Pivotable Vehicle Headlight Cooling Channel Design
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Solution Overview
Problem
Existing motor vehicle headlight cooling systems inadequately cool components with higher heat loads, as they distribute air flow uniformly throughout the housing, leading to insufficient cooling of temperature-sensitive components.
Innovation Solution
A motor vehicle lighting device with a pivotable light-generating unit and a cooling channel comprising non-contact duct routing sections, where the fluid flow is directed to specifically target heat-generating components, utilizing funnel-shaped sections to create a directed flow and negative pressure areas, ensuring efficient heat dissipation without warming the surrounding housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air flow is distributed uniformly throughout the housing interior, then all components are cooled, but components with higher heat loads are not sufficiently cooled
Solution Approach 1:
The cooling system is designed with different cooling strategies for different regions: a directed cooling channel with funnel-shaped sections for heat-generating components requiring intensive cooling, and a ventilation system for general housing cooling. This local differentiation ensures that components with higher heat loads receive sufficient cooling while other components are cooled adequately without wasting cooling resources.
Solution Approach 2:
The cooling system is segmented into two independent parts: a dedicated cooling channel for heat-generating components and a general ventilation system for the housing interior. This segmentation allows each subsystem to be optimized for its specific function, with the cooling channel providing targeted high-velocity flow to critical components while the ventilation system handles overall air circulation.
2Loss of energy
If a fan is used to generate cooling air flow, then heat dissipation is improved, but the housing interior becomes warmer due to distributed air flow
Solution Approach 1:
The cooling channel is extracted as a separate system from the general housing ventilation. It directly connects to the exterior environment, allowing cooling air to be drawn from outside the housing rather than circulating warm air within the housing interior. This extraction approach enables effective heat dissipation from critical components while preventing the housing interior from warming up due to recirculating hot air.
3Reliability
If cooling air is distributed throughout the housing, then general cooling is achieved, but targeted cooling of specific components is insufficient
Solution Approach 1:
The cooling channel incorporates funnel-shaped sections that create localized high-velocity air flow directly at the heat-generating components. This localized quality enhancement ensures reliable cooling of critical components through concentrated cooling effort, while the rest of the housing relies on the simpler ventilation system, thus avoiding unnecessary complexity throughout the entire structure.
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 design effectively cools heat-generating components while maintaining a lower temperature in the headlight housing, extending the service life of sensitive components and reducing the overall weight and cost of the headlight by allowing for targeted cooling and efficient heat dissipation.
Implementation Method 1
The first duct routing section is set up to direct a fluid flow onto the second duct routing section
Implementation Method 2
utilizing funnel-shaped sections to create a directed flow and negative pressure areas
Implementation Method 3
When the headlight is in operation, thermal energy is generated, i.e. heat, which is emitted by the light source and the electronic components. In order to ensure the operability of the headlight and to ensure that the headlight components are not damaged by the thermal energy, this heat must be dissipated.
Implementation Method 4
A channel is formed between the heat sink and a backplate, in which the plurality of heat dissipation fins are received
Data Source
Figure 1
AI summary
The invention relates to a lighting device (10) for a motor vehicle. The lighting device (10) comprises a housing (12) which encloses an interior space (14). Furthermore, the lighting device (10) comprises a light-generating unit (20) and a cooling channel (34), which are arranged in the interior space (14), wherein the cooling channel (34) has at least a first cooling channel section (36). The light-generating unit (20) is pivotably mounted in the housing (12). The first cooling channel section (36) further comprises a first channel guide section (40) and a second channel guide section (42), which are arranged without contact with each other. The second channel guide section (42) is arranged on the pivotable light-generating unit (20). The first channel guide section (40) is configured to direct a fluid flow onto the second channel guide section (42).The second channel section (42) is designed to receive most or all of the fluid from the first channel section (40) in every pivot position of the light generation unit (20).