Email:elliewangled@chinacytech.com Shanghai Ceyuan Industrial Co.,Ltd

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Shanghai Ceyuan Industrial (SCI) Ltd.

ADD:Room 901, No.20, Lane777, West Guangfu Road, Putuo District, Shanghai, China. 

Contact: Ellie Wang

TEL: +86-573-82753308

Mobile: +8618042017693

FAX: +86-573-82753302

E-mail: elliewangled@chinacytech.com

Website: www.cyledlight.com


Outdoor LED Fixtures Keep Repeating

Outdoor lighting lamps and lanterns need to withstand the test of the snow and the sun, Outdoor LED Fixtures wind and rain, and the cost is higher, and because the use of the external wall is difficult to repair, to meet the long-term stability of the work requirements. and LED is delicate semiconductor components, if damp, will appear chip moisture phenomenon, damage led, PCB and other components, therefore, the LED suitable for work in dry and low temperature. To ensure the LED in the outdoor harsh conditions for long-term and stable work, Outdoor LED Fixtures the design of waterproof structure of lamps is extremely critical.

At present, the waterproof technology of lamps is mainly divided into two directions: structural waterproofing and material waterproofing. The so-called structural waterproofing, is the product of the various components of the composition, has been waterproof function. and material waterproof, is the product design, Outdoor LED Fixtures leave out potting glue airtight electrical element position, assemble with glue material to realize waterproof.

Ultraviolet radiation on the exposed to the lamp outside the wire insulation layer, shell protective coating, plastic parts, potting adhesive, sealing rubber ring adhesive, adhesives have a destructive effect.

After the aging of the insulation layer, the water vapor penetrates into the interior of the luminaire through a gap in the wire core. After the coating of the lamp housing aging, the shell edge coating cracking or stripping, there will be gaps. The plastic shell will deform and crack after aging. Outdoor LED Fixtures The aging of electron potting colloid will cause cracking. Sealing rubber ring Rubber strip aging deformation, there will be gaps. The bonding glue between the structural parts aging, reduce adhesion force will also appear cracks. These are ultraviolet rays on the waterproof capacity of the lamp damage.

The temperature varies greatly in the outdoors every day. Summer daytime lamp surface temperature can rise to 50~60℃, night to $number QC, winter ice and snow days temperature can be reduced to below zero, year-round temperature difference is greater. Outdoor lamps in the summer high-temperature environment, materials accelerated aging deformation. When the temperature drops to zero, the plastic parts become brittle, Outdoor LED Fixtures under the pressure of the ice or cracking.

With casing expansion and contraction: the temperature changes lead to the expansion and contraction of lamps and lanterns, different materials (such as glass and aluminum profiles) coefficient different, the two materials in the joint will appear displacement. Outdoor LED Fixtures The process of expansion and contraction is repeated, and the relative displacement is repeated, and the air tightness of the luminaire is greatly damaged.

The temperature rises, under the huge negative pressure effect, the moist air passes through the light body material small gap, penetrates the lamp body interior, encounters the low temperature the lamp shell, condenses into the water droplets and gathers. After the temperature is reduced, under the action of positive pressure, the air is discharged from the lamp body, but the water droplets are still attached to the lamp. Outdoor LED Fixtures Daily repeated changes in the temperature of the respiratory process, lamps inside more and more water.

The physical changes of thermal expansion and contraction make outdoor LED lamps waterproof and airtight design become complex systems engineering. Outdoor LED Fixtures The following analysis of the technical characteristics of two kinds of waterproof system for lamps and lanterns, in order to understand their advantages and disadvantages。


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