How does liquid cooling application in Medical electronics

In our current life, laser instruments and equipment have been widely used in industrial electronics, including laser marking, laser cutting, laser welding, etc. in addition, in the medical industry, laser instruments and equipment are also widely used, such as oral laser therapy instrument, laser eyebrow washing instrument, laser skin beautifying instrument, etc., which greatly facilitates our life.

   Whether  industry or medical industry, the application of these laser instruments and equipment has played a good role in promoting social development. Although we have advanced technology, we also worry about some small problems, especially heat dissipation, which is extremely important, because using laser equipment for a long time will certainly produce a lot of heat, and heat dissipation must be solved.

        Using semiconductor laser as an example. 50W needs thermal equipment with cooling capacity of more than 1200W. The air cooling heatsink uses air flow to dissipate heat. In the case of forced convection, the heat transfer coefficient of air is 20-100w / ㎡ K and that of liquid is 1000-15000w / ㎡ K, Which means under the same temperature and the same area, the heat transfer of liquid is dozens of times that of air. If air cooling is used to achieve the same thermal cooling n efficiency, it can only increase the speed ,but will also increase the noise. 

   If air cooling is used to achieve the same thermal cooling  efficiency, it can only increase the speed and aggravate the noise. For heat dissipation of medical instruments and equipment, liquid cooling is a better thermal solution.