Qiong Yao invented the oil lamp in the Tang Dynasty.
"Fuel-efficient lamp" appeared in the Tang Dynasty, and this sentence "not fuel-efficient lamp" was handed down from the Tang Dynasty. The provincial oil lamp is a creative invention in the Tang Dynasty, which was invented by Qiong Yao in the Tang Dynasty. During the Tang and Five Dynasties, many famous kiln products in China had a unified style of practicality and artistry, but some works of Qiong Yao Kiln had high scientific and technological content, which reflected the unity of practicality, artistry and scientificity. The most typical one is the world-famous "oil lamp saving".
So, what does an oil lamp look like and what principle does it use? The fuel-saving lamp is laminated and hollow. Water injection can reduce the heat of lamps, reduce the overheating and volatilization of engine oil, and achieve the purpose of saving oil. The physical principle of this kind of fuel-saving lamp was quite popular in the early years of Southern Song Dynasty. However, the same physical theory was generally accepted and became the law in the middle of the western19th century.
It can save about 20% lamp oil.
According to records, provincial oil lamps appeared in Sichuan in the Tang Dynasty and were still popular in the Song Dynasty. Because the expansion coefficient of ceramics is difficult to master in the firing process, it is not easy to make oil lamps, which are not as common as dish lamps. Provincial oil lamps have also been unearthed in archaeology. During the period of 1999, the Three Gorges Archaeological Team of Beijing Institute of Cultural Relics unearthed a Song Dynasty "oil lamp" in Shituo Cemetery in Fuling, the Three Gorges Reservoir Area, which is exactly the same as the description given by the Song Dynasty poet Lu You, indicating that the "oil lamp" that people often say verbally is not nonsense.
According to records, this kind of provincial oil lamp discovered by the archaeological team is no different from ordinary oil lamps at first glance, except that its wall is a hollow interlayer with a small round mouth on the side of the wall for injecting water into the interlayer. This provincial oil lamp is exactly the same as that described by Lu You: "Don't use copper lamps for book lamps, porcelain lamps are the most fuel-efficient. There is a porcelain lantern in Shu, which can save half the fuel by injecting water into your lips. " Don't use copper plates to hold oil when reading, porcelain plates are the most fuel-efficient. There is an oil dish in Sichuan, like two oil dishes stacked together, with a sealed edge and a small hole on the edge. Inject a small amount of water into the interlayer from the hole, and then pour the lamp oil into the oil pan, which can save half of the oil.
1In August, 983, Professor Chen Defu, an ancient ceramics scholar of Sichuan University, made a scientific test on the fuel-saving effect of Qiong Yao energy-saving lamps. The fuel saving effect can reach 20%-30%, especially in summer than in winter.