The standard issue is one of the most concerned topics in the LED lighting industry. In Tsinghua University Architectural Design and Research Institute Co., Ltd., Zhao Jianping, deputy dean of the Institute of Building Environment and Energy Conservation of the China Academy of Building Research and director of the CSA Application Promotion Committee, read about the LED lighting in the new edition of Architectural Lighting Design Standards (GB50034-2013). Terms. According to reports, the current standards for lighting design are gradually updating the terms of LED lighting. In addition to the "Architectural Lighting Design Standards" (GB50034-2013), "City Road Lighting Design Standards" (CJJ45), "Sports Hall Lighting Design and Testing Standards" (JGJ153) are being revised, "LED Indoor Lighting Application Technical Requirements" The "Technical Requirements for LED Urban Road Lighting Applications" has been reviewed. Zhao Jian said that the reason why previous lighting designers did not dare to use LED lamps was because there was no standard. It can be seen that with the introduction of a number of lighting design standards for LED products, the application of LED lighting in various places will be fully rolled out. Zhao Jianping said that the evaluation indicators in the new edition of "Architectural Lighting Design Standards" (GB50034-2013) include: lighting quantity, lighting quality, lighting energy saving, the principle is to make lighting products safe, comfortable, energy-saving and environmentally friendly. Zhao Jianping emphasized the mandatory standards in the new GB50034 standard, some of which are even higher than those in Europe and America. It is worth noting that in addition to the light efficiency issues that the industry has been paying attention to, the new standards emphasize several important indicators of lighting comfort. For example, the color tolerance between the same type of light source should be lower than 5SDCM; the color rendering index should be no less than 80, and R9 should be greater than 0. Especially in the room or place where the long-term work or stay, the color temperature should not be higher than 4000K; The deviation of the chromaticity coordinates of the LED from the initial value should exceed 0.007; the deviation of the chromaticity coordinates of the LED luminaire in different directions should not exceed 0.004. As a bridge between engineering and owners, engineering and products, the designer's standards in lighting design determine the choice of lighting, and this is the most concerned issue for LED lighting suppliers. What kind of lighting will the designer choose? Zhao Jianping emphasized that LED lighting companies often only provide light efficiency and light distribution curves, while ignoring the mandatory standards stipulated in the new standard. Designers cannot calculate without the above-mentioned indicators. In addition to the incomplete product parameters provided by the company, LED lighting products have not yet been standardized. The classification of products is not conducive to the choice of designers, and the uneven quality of products still restricts the process of LED lighting penetration into the room. Although designers are still very cautious about the use of LED lighting in indoor lighting, Zhao Jianping still believes that LED products will be spread all over the corners of lighting. The development of semiconductor lighting in the field of lighting is unstoppable, and the energy saving and emission reduction of semiconductor lighting exerts its great potential.
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Mechanical properties of injection connector fittings as far as connection functions are concerned, insertion and extraction forces are important mechanical properties. Plug force is divided into insert force and pull out force (pull out force is also called separation force), the requirement of both is different. In the relevant standards, there are provisions for maximum insertion force and minimum separation force, which indicate that, from the point of view of use, the insertion force should be small (hence the structure of LIF with low insertion force and ZIF without insertion force), and if the separation force is too small, it will affect the reliability of contact.
Another important mechanical property is the mechanical life of the connector. Mechanical life is actually a kind of durability index, which is called mechanical operation in GB5095. It is based on a cycle of one insert and one pull, and whether the connector can normally complete its connection function (such as contact resistance) after the specified plug cycle. The plug force and mechanical life of the connector are related to the plating quality (sliding friction coefficient) of the contact part of the contactor structure (positive pressure size) and the dimensional accuracy (alignment) of the contactor.
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