Result in Tungsten lamp burned- Hot Effect
Incandescent lamp is a kind of thermal electric light source, its working principle is high temperature radiation illuminated by the filament. When you are working in the filament temperature is very high (about 2700 ℃), is bound to cause part of the Tungsten filament evaporation. Evaporation filament tapering, and appear uneven thickness. With the loss degree of increasing, the filament will burn out in starting or work, end of its service life.
Especially the moment, opening the lamp current is far above the rated current of the light bulb. This current is about 0.007 seconds, in such a short time, the filament temperature soared, the filament produce "hot spots", some weak positions of Tungsten excessive evaporation, gradually (through frequent switch) Tungsten filament in these places becomes more and more thin, so easily broken wires occur when turn on the light.
Incandescent lamp as the light of the application is still very common, one of the research and improvement of it never pause. Among them, how to prolong the service life of incandescent lamp Tungsten wire inside the is one of the important interest and the purpose of people to study, such as halogen lamp the emergence of a certain extent, prolong the life span of the Tungsten lamp. But in essence, Tungsten wire in hot state is more or less will happen Tungsten turned fine Tungsten atoms (and uneven) sublimation phenomenon. Understanding this process for prolonging the life of the lamp from the essence is decided to significance. A lot of literature, at the mention of Tungsten filament lamp damage reason mentioned filament of so-called "hot effect".
Theoretically, due to the evaporation and temperature index of the Tungsten atoms never to 0 (index), on the other hand, the Tungsten wire is fine, the greater the resistance, the smaller the bulb power, therefore, a perfect straight Tungsten wire is not destroyed, just as the use, the light bulb is more and more dark. And, in fact, Tungsten filament on the total defective, typical is, there's always a part of the Tungsten fine than other places.
Most people have such experience, at the moment of bulb damage, is not a whole article Tungsten all evaporate, but the sudden rupture of a point, and usually accompanied by a certain point relative to other bulb lights suddenly. Most such fracture of Tungsten light bulb in the use of certain skills will be put together again, you can also use a short period of time, at least to flash (usually do not imitate). In fact, this case is the "hot spot effect".
Especially the moment, opening the lamp current is far above the rated current of the light bulb. This current is about 0.007 seconds, in such a short time, the filament temperature soared, the filament produce "hot spots", some weak positions of Tungsten excessive evaporation, gradually (through frequent switch) Tungsten filament in these places becomes more and more thin, so easily broken wires occur when turn on the light.
Incandescent lamp as the light of the application is still very common, one of the research and improvement of it never pause. Among them, how to prolong the service life of incandescent lamp Tungsten wire inside the is one of the important interest and the purpose of people to study, such as halogen lamp the emergence of a certain extent, prolong the life span of the Tungsten lamp. But in essence, Tungsten wire in hot state is more or less will happen Tungsten turned fine Tungsten atoms (and uneven) sublimation phenomenon. Understanding this process for prolonging the life of the lamp from the essence is decided to significance. A lot of literature, at the mention of Tungsten filament lamp damage reason mentioned filament of so-called "hot effect".
Theoretically, due to the evaporation and temperature index of the Tungsten atoms never to 0 (index), on the other hand, the Tungsten wire is fine, the greater the resistance, the smaller the bulb power, therefore, a perfect straight Tungsten wire is not destroyed, just as the use, the light bulb is more and more dark. And, in fact, Tungsten filament on the total defective, typical is, there's always a part of the Tungsten fine than other places.
Most people have such experience, at the moment of bulb damage, is not a whole article Tungsten all evaporate, but the sudden rupture of a point, and usually accompanied by a certain point relative to other bulb lights suddenly. Most such fracture of Tungsten light bulb in the use of certain skills will be put together again, you can also use a short period of time, at least to flash (usually do not imitate). In fact, this case is the "hot spot effect".
stevia - 19. Dez, 07:47
