Promote the use of lights in the cold regions is very easy problem is neglected due to snow accumulation in the surface of the light, the heat melted the ice, ice, once formed, is to vehicles and pedestrians have a very large security risk. In particular, Led torch, lamp shells commonly used aluminum, the surface of alumina is a hydrophilic material, and more prone to ice condensation. In 2008, the range snowstorm in southern China, resulting in the high voltage wires of aluminum surface ice condensation, CREE flashlight damaged power facilities. The disaster consequences of not only the climate, the alumina surface of the high-voltage cable is a hydrophilic material is also an important incentive. Due to the impact on road traffic safety, to prevent the ice condense Led torch in the cold regions must take into account the security measures.
In order to address this critical technology, through the ice cover surface with microscopic imaging analysis, analysis of the water in the surface ice, and ice surfaces can be firmly attached. The experimental results showed that only hydrophobic performance CREE flashlight materials, to prevent ice condensation effect is not satisfactory, or even water in some of the material surface can be frozen very solid. The test results show that: the ice can be attached to any object on the surface; cracks and depressions on the surface, ice can firmly adhere to the surface of another; simple hydrophobic materials with good delay icing process, but can not prevent the formation of ice.
To a more accurate comparison of different materials, the ability to prevent ice condensation in-depth study from a different perspective, a different surface structure of the object, the surface of the intrinsic relationship of the physical properties and ice cover CREE flashlight, including: structural shape and ice cover, materials of construction Cover with ice, surface finish and ice cover, surface hard and soft ice. The results show that: the shape of a simple structure, organizational structure, surface water, the hydrophobic properties of superior components, not prone to ice condensation.
This test data based on two consecutive years in the winter set up a different look and shell materials, Led torch, found through experiments: whatever the lighting sleek, smooth and flat; there is no accumulation of snow or water bearing structure; surface material Led torch with excellent hydrophobic properties will not produce ice condensation.
Cold regions in China are mostly in high latitudes, cold climate, large temperature difference, so the application of the CREE flashlight products brought new challenges. On the other hand, most of the cold regions the annual average daily lighting time are longer than the national average, so the lighting power consumption is also higher than the national average, so the shorter days and longer geographical features bring more CREE flashlight application requirements. In short, both challenges and opportunities are well.