Solution for fogging headlamp assemblies I
The temperature and flow fields inside the headlamp are the
The main influencing factors are The structural design of the headlamp affects the temperature and flow fields within the headlamp.
The design of the headlamp structure affects the internal temperature and flow fields.
a)
a) Avoiding narrow structures in the area of the headlamp trim ring and lenses, especially in the lower part of the headlamp, as long as the heat resistance of the headlamp is met.
Narrow areas are not conducive to the flow of gases within the headlamp.
b)
Avoid large decorative areas in areas not directly illuminated by the light source, or make patterns on the inner surface of the light distribution mirror to reduce the effect of fog on the headlamp.
The fogging effect on the appearance of the headlamp can be minimized by creating a pattern on the inner surface of the mirror.
c)
A gap should be left between the upper and lower parts of the luminaire to facilitate gas flow.
The narrow gaps between the front bezel and mask and between the rear bezel and housing should be avoided.
The long gaps will impede the flow of gas.
d)
The CAE engineer should be involved early in the design phase of the headlamp.
The design should be optimized by analyzing the temperature and flow fields in the headlamp to avoid excessive temperatures in the low-temperature area of the light distribution lens.
The design should be optimized to avoid low temperatures in the low-temperature area of the light distribution lens and the presence of dead zones in the gas flow to effectively prevent or solve fogging problems.
e)
The use of cooling fans is mainly for the heat dissipation of the LEDs and greatly improves the airflow and heat distribution in the luminaire.
The additional benefit of improved fogging is achieved.
