liquid cooling application in laser device

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

     We take semiconductor laser as an example. 50W needs heatsink equipment with cooling capacity of more than 1200W. The air-cooled radiator 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 water is 1000-15000w / ㎡ K. that is to say, under the same temperature and the same area, the heat transfer of water is dozens of times that of air.

      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 laser instruments and equipment, liquid cooling is a better thermal solution.