LED operating light radiator system

Before describing the LED operating light radiator system, it is necessary to understand the characteristics of LED light source firstly. Mingtai operating light driven by constant current source can control operating light brightness better, effectively improve operating light’s reliability, life expectancy and light failure. In fact, using constant current source driver is the basis of LED operating light cooling solution, and good heat dissipation can ensure operating light’s constant brightness.

Radiator system design generally base on fluid dynamics software simulation, and then do the basic design according to it, radiator design process is the following three steps:

1. Design operating light radiator outline according to customers’ requirement.

2. Optimize radiator tooth thickness, tooth shape, tooth spacing, substrate thickness according to the radiator design standards.

3. Recheck and calculate the error value according to the field test feedback data.

According to different cooling methods, LED operating light radiator system can be divided into 2 kinds: natural cooling radiator and natural convection radiator.

1. Natural cooling radiator design method

Considering that the temperature boundary layer is thick during natural cooling, if the tooth spacing is too small, the thermal boundary layer of two teeth can easily cross and affect the convection of the tooth surface, so under normal circumstances, it is recommended that naturally cool radiator teeth spacing is more than 12mm, if the radiator tooth height is less than 10mm, the tooth pitch can be determined by ≥1.2 times tooth height.

On the other hand, natural cooling radiator surface heat exchange capacity is weak, adding corrugations on the surface of radiator teeth will not have much influence on the natural convection effect. Therefore, it is suggested that the surface of radiator teeth is not corrugated.

2. Natural convection radiator design method

Natural convection radiator surface generally use blackening treatment to increase the radiation coefficient of the cooling surface, and strengthen radiation heat transfer. Due to the longer time of natural convection reaching heat balance, the natural convection radiator substrate and tooth thickness should be sufficient to combat the impact of instantaneous thermal load, it is recommended more than 5mm.