The LED lamps and lanterns is big the waterproof performance

When we put the focus on LED lamps and lanterns, the cooling performance of a magnifying glass, in fact, ignoring another equally important factor waterproof performance. LED buried lights, in this case, for example, tell me about the important sector that nots allow to ignore. Here are several kinds of lamps and lanterns of waterproofing system ( Waterproof structure, waterproof material, potting glue) Technical characteristics are analyzed, in order to understand their own strengths and weaknesses. Waterproof structure based on the structure of the waterproof design of lamps and lanterns, need to closely cooperate with the silicone seal waterproof, more precise and complex shell structure, usually applies to the lamps and lanterns of big size, such as floodlight, square and round bar, high-power lamps and lanterns in the project-light lamp, etc. Structure waterproof lamps and lanterns only do purely mechanical assembly structure, using simple tools, assembly process and process, less assembly cycle short, convenient repair in production line. Waterproof lamps and lanterns through performance and testing to packing, suitable for short delivery period of the project. Only suitable material and structure, can guarantee its waterproof performance, the following several design points. ( 1) Design silicone waterproof laps, choose suitable material hardness, design the appropriate pressure, the cross section shape is also very critical. Cable lead-in is water seepage channels, to choose waterproof wire, and use a strong waterproof cable fixed head, PG) , can prevent moisture from a crack in the cable core permeability, but the premise is the wire insulation layer under the PG long-term strong extrusion head without aging craze. ( 2) Moreover, considering also combined with the linear expansion coefficient of glass. Assumes that the lamps and lanterns of length of 1000 mm, the shell temperature of 60 ℃ during the day, rain or night the temperature fell to 10 ℃, the temperature drop 50 ℃, glass and aluminum will shrink 0 respectively. 36 mm and 1. 16 mm, relative displacement is O. 8 mm, sealing element in the process of repetitive displacement by pulling, affect air tightness. ( 3) A lot of medium and high power outdoor LED lamps can be installed waterproof lock valve ( Breathing apparatus) Use of a respirator, the waterproof breathable function of molecular sieve, balance internal and external pressure of lamps and lanterns, eliminate the negative pressure, prevent inhalation moisture, guarantee the dry inside the lamp. Different chemical formula, the pouring sealant flexibility, stability of molecular structure, adhesion, uV resistance, heat resistance, low temperature resistance, hydrophobic, physical and chemical properties such as insulation performance index behave differently. Elasticity: colloidal soft, elastic modulus is small, the adaptability is better. The modified organic silicone elastic modulus is minimal. Molecular structure stability: under the effect of uV, high and low temperature air long-term, stable material chemical structure, not aging not cracking. With modified organic silicone is the most stable. Adhesion, adhesion is not easy to peel, of which the adhesion of modified epoxy resin, the strongest chemical structure stability is poorer, but easy ageing craze. Colloid hydrophobic: said the ability of resistance to water penetration. The modified organic silicone hydrophobic is better. Insulation: insulation is related to product safety index, the above several kinds of material filling rubber for good material of special potting glue is pretty good. From all the physical and chemical properties of above together, do better by the modified organic silicone material, but because the material cost is too high, PuHua degree is not high. Comprehensive the above all kinds of sealing technology, measurement and comprehensive performance, the indicators are still in structure type waterproof sealing waterproofing for optimal. In outdoor LED lamps and lanterns, represented by the LED buried lights, visible waterproof performance directly affects the service life of LED lamps and lanterns and long-term stability. And the merits of the waterproof performance of lamps and lanterns to design, the properties of the selected lamp materials, precision machining, assembly technology and so on are closely related. If weak links appear deformation and water penetration, to the LED lamps and electronic devices will cause irreversible damage, and this kind of situation it is difficult to predict, in the process of inspection with a sudden. Therefore, improve the reliability of LED lamps and lanterns of waterproof performance, pay attention to waterproof technology, urgent!
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