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Analysis of LED candle lamp water vapor problem

2018-04-25 06:24:42

LED candle lamp has water vapor problem analysis problem 1. Because the bubble shell of the candle lamp is pointed, water vapor will appear in aging, and after turning off the lamp, the water vapor will adhere to the inner wall and dry to form a stain analysis 1. The hot air - hot fluid formed by LED heating rises to the top of the sharp bubble. When the hot fluid accumulates at the top and cannot flow, it forms a temperature difference with the external temperature and adheres to the inner wall to form water vapor and water droplets. -- Analysis when the tip is lit up. 2. The water in the glue will overflow under the heating part. 3. The moisture of the assembly workshop adheres to the surface of the product, especially in winter and spring. Solution 1. The inner space of the tip is enlarged, and the mold should be changed. 2. The use of anhydrous glue, not heat conduction glue or fixed bubble shell with glue to avoid the generation of water. You can disassemble the bubble shell to analyze the residual acid and alkali on the bubble shell, if it is consistent with the composition of glue, there is no doubt that it is the problem of glue. The reasons are as follows: 1. The viscosity of the base oil is too low, resulting in too much small molecule content. 2, the quality of the thermal conductivity powder is too poor, which contains part of the water mist and the residual part of the powder surface after treatment of low molecular compounds. Adhesive: 1, the purity of the base adhesive is not enough, that is, the small molecule content is too much. 2, the product contains some plasticizers (low viscosity silicone oil). 3, the powder contains small molecular compounds. 4. Small molecules are released during the curing process of glue. In order to avoid the above aspects, it is necessary to control the base glue and the powder. 3. Age for 1 hour before filling the bubble shell, or do dehumidification work in a closed room. A small number of experiments can be done to prove whether this method is effective, and each part is baked before assembly, and at the same time to dehumidification, and then aging observation.

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