How to improve the development of LED lighting lighting design difficulty? (three)

LED lamp explosion-proof design is essential

2011 is a year of frequent bombings, due to oil cracking plant accident caused huge human and material damage, the Council declared since 101 years of the Republic of China, lighting, motor, switch box for dangerous places used for the control, in order to reduce safety accidents, but also caused the lighting industry note. Due to the use of traditional lamps when voltage and current is large, or the use of high temperature, easy in operation process, because the temperature of overheating or switch arc generation and become detonated combustible fire, LED has a low voltage operation and low operation temperature characteristics, suitable for the future seems very as explosion-proof lamp, explosion-proof field however but many LED and are unfamiliar with the field of lighting industry. In addition, the model and system for the explosion-proof verification is known to be limited. The term "explosion proof" is actually a simplistic argument, which is to prevent the explosion and to prevent the destruction of the explosion. There are different explosion risk classification systems in the world, which are mainly divided into the IECEx system defined by the United States electrical code (NEC), and the International Electrotechnical Commission (IEC). Due to different hazardous gases and the environment, can not let the use of electrical products or failure to become the source of explosion. To avoid becoming an explosive source, you must pay attention to the following questions:

The production of sparks, or sparks in contact with hazardous materials

General switch flash control, easy for conductor charged instant contact and electric spark or arc, or for replacing the light source when the mutual friction between metal sparks, such as arc or spark, it is easy to ignite flammable gases such as acetylene etc.. Therefore, the design of lamps, to avoid the use of sparks will be generated by the switch, or the switch must be sealed, so as not to switch during the production of sparks and flammable gas contact.

Shell design

To avoid the spread of fire, when the body is caused due to the failure of internal fire and even a small explosion, the shell must be the flame or explosive cladding, let the flame self extinguishing without igniting flammable gas machine in vitro. In order to achieve this effect, it is necessary to use a relatively hard shell and pressure relief device, or to be sealed with a large transparent enclosure, etc.. In addition to flammable gases, dust, or even wood chips, fiber chips, etc. are also classified as likely to cause an explosion of fire hazards. Since lighting is almost all places of electrical appliances are necessary, in case of explosion or fire have now increased by one point security is less of a delay in the lamp harm, dangerous places listed above with safety.

Durability and reliability determine LED lighting life

Lighting Fair 2012, almost LED lamp price situation, in addition to energy saving, more LED industry shouted up continuously for 30 years the slogan, although there is no consistent LED life estimation standard, face LED lamps relatively expensive, compared to the popularization of the fluorescent lamp illumination, longer service life absolutely must have LED light weapons. LM-80 is currently widely accepted LED light aging test method, LED light source must be 55 C and 85 C and 105 C three different ambient temperature under continuous light for 6000 hours (nearly 1 years), optical properties also have to be able to keep the yuan, through this assessment of the light source, and its durability no words, but light features such as keep testing, so often do not represent the life of lamps, lamp life and decided the following factors:

Lamp durability

Although the relative structure of the lamp is simple, but it is composed of many components, to provide low-voltage DC power supply transformer is one of the important components, and therefore is one of the key to determine the life of lamps. Although most of the direct power supply adopts low voltage DC power consumer electronics, consumer electronics, but with short life cycle, can provide long-term continuous use of lamps may be a problem, although it has not established the service life of transformer products to estimate standard, but in the long-term use of solar photoelectric converter data, the technology and acceptable cost, the best frequency seems to have only 5 years of life.

Safety reliability

In addition to durability, long use safety is another challenge, the plastic shell with the use of the operating environment gradually deterioration, so the internal insulation materials, both insulation and mechanical protection or flame resistant properties will gradually produce deterioration.

The RTI index UL long time heat resistance with the industry wide acceptance of the assessment method (RelativeThermalIndex) as an example, the temperature in the long-term use under 10 years, will have the characteristics of plastic risk attenuation in half, in the same way, to be able to maintain a more long-term safety, we must adopt more heat-resistant plastic materials.

People not only want ever-young, we also hope that all the activities are able to continue to use bored in so far, there is only one earth, under the conditions of limited resources, recycling can significantly reduce material waste, promote the second-hand goods circulation also to promote environmental protection, but also reduce the frequency of purchase of new. But in the purchase or sale of second-hand goods at the same time, the residual service life and safety guarantee, is the responsibility of manufacturers must face challenges.

The appearance of LED, and not replace LCD TV CRT so simple, using elastic LED light source, the application scope is also far more than in the lamp, not only improve the efficiency of light and much longer so simple, although can be as simple to change a light bulb, but LED has more application space in the application every kind of condition under the new lamp and not simply using the traditional design of lamp design, its function, safety and durability are also will be a new challenge.