First, the energy-saving lamps are the progress of inca […]
First, the energy-saving lamps are the progress of incandescent lamps. As we all know, incandescent lamps are an important invention of Edison. This important invention enables humans to bid farewell to the darkness and usher in a bright future. However, an incandescent lamp consumes too much electricity. It is probably less than a tenth. One of the energy became light energy, and the other was wasted energy wasted. So people are looking for ways to replace the incandescent lamp with a new light source. Energy-saving lamp came into being. Because it compares It is cheap and easy to make, so it has been used in a large number of applications and has gradually replaced incandescent lamps.
Second, the principle of energy-saving lamps light the two poles of energy-saving lamps are ordinary tungsten wire. After the tungsten wire is heated, it can emit electrons. Adding a relatively high voltage on both sides of the lamp tube, forming an electric field, these electrons will be in the lamp. The tube is accelerated, forming a stream of electrons with a certain speed and energy. The tube is evacuated and filled with mercury, which is what we call mercury. When the lamp is heated and energized, the mercury evaporates from the liquid state and becomes gaseous. The free mercury atoms are formed. The electrons in the electron stream hit the mercury atom at a certain speed, causing the mercury atom to be excited and become an excited ion. This is called a step. The mercury in the excited state spontaneously falls back to the very short time. In the original state, ultraviolet light was released at the same time, and ultraviolet light could not be used for lighting. So we coated some fluorescent substances on the inner wall of the lamp tube under the bombardment of ultraviolet light.
After the fluorescent material is excited, it can emit relatively natural light and can be used for our lighting. The more common energy-saving lamps on the market are ordinary general-purpose lamps and tri-color lamps, which are increasingly mainstream, and have the advantage of saving electricity compared to incandescent bulbs. The difference is that the color rendering of the ordinary lamp is low, and the three-color lamp shows a natural sunlight color, and is superior to the ordinary lamp in terms of color rendering and light efficiency. From the above we can know that mercury plays an intermediary role in energy-saving lamps, and no mercury energy-saving lamp will not emit light. The mercury in each lamp is very small. According to the investigation, a large-diameter tube fluorescent tube with a tube diameter of 36 mm contains 25-45 mg of mercury, and a small-diameter tube with a diameter of 26 mm has a mercury content of 20 mg and a tube diameter of 10 mm. The compact fluorescent lamp contains 10 mg of mercury. Mercury is a liquid at room temperature and is an easily flowing silver-white liquid metal. Mercury exists as a gas discharge medium in a fluorescent tube, which not only improves the light efficiency of the lamp, but also enriches the type of the light source. So current energy-saving lamp light sources contain mercury. Because the boiling point of mercury is very low, it can evaporate at room temperature. After the broken fluorescent tube breaks down, it immediately emits mercury vapor to the surroundings, instantly allowing the concentration of mercury in the surrounding air to reach 10 to 20 milligrams per cubic meter. The maximum allowable concentration in the air is 0.01 milligrams per cubic meter. It can also flow with the air. Once the mercury entering the body exceeds a certain threshold, it will destroy the human central nervous system, causing great harm to the body. Mercury is difficult to remove after it enters the body. The workers in the factory of the author have not been exposed to mercury for more than a decade, but the mercury content in the body is still very high, and the mercury discharge needle is still being used at any time. So I have a kind of instinct for energy-saving lamps. In fact, mercury-containing lighting lamps generally have little pollution during use. The main cause of pollution is that electric light sources are discarded after being scrapped, and mercury is diffused into the air as a result of cracking, which endangers human health and pollutes the environment. Because recovery is difficult and the value of recycling is too low, plus it has many other ills, the only solution is to eliminate it.
Third, some of the shortcomings of energy-saving lamps 1, mercury pollution in the production process and after the use of waste, the current Western countries are very concerned about mercury pollution. People are also more and more aware of the dangers of mercury pollution. 2, due to the glass products , Easily broken, bad transport, not easy to install. 3, its power consumption is still too much. 4, easy to damage, short life, energy saving is not the best sentence of this sentence.
Fourth, what are the advantages of LED lights 1, energy saving. White LED energy consumption is only 1/10 incandescent, energy-saving lamps 1/4. 2, longevity. Life of up to 100,000 hours or more, for ordinary home lighting can be described as " Once and for all ". 3, can work in high-speed state. Energy-saving lamps if the frequent start or turn off the filament will be black and quickly broken. 4, solid-state packaging, is a cold light source type. So it is very convenient to transport and install, can be installed in any miniature and closed equipment, not afraid of vibration, basically do not need to consider heat. 5, LED technology is advancing with each passing day, its luminous efficiency is making the astonishing breakthrough, the price is reducing constantly.