Electric heating is a process of converting electrical energy into heat energy. Since the discovery that the power supply can produce thermal effect through wires, there are many inventors in the world engaged in the research and manufacturing of various electric heating appliances. The development and popularization of electric heating is the same with other industry, generally follow such a law: from the advanced area gradually promoted to the countries of the world; The gradual development from the cities to the countryside; From collective use gradually developed to the family, and then to the individual; Products are generally developed from low - grade to high - grade.
The electric heating elements are mostly false and inferior in the 19th century, the first is used to life in the electric appliances, In 1893 the first prototype of the console appeared and began to be used in the United States, followed by the use of the electric stove in 1909, which placed an electric heater in the oven, meaning that heating was transferred from wood to electricity.
But regarding the rapid development of the real electric heating industry, it is after the invention of nickel-chromium alloy used as electric heating elements. In 1910, the United States developed the first successful electric iron made of nickel-chromium alloy electric heating wire, which fundamentally improved the structure of the electric iron, the use of iron quickly gained popularity. In 1925, the electric heating element was installed in the pot in Japan and became the original form of the modern electric rice cooker.
The period from 1910 to 1925 is the great development stage in the history of electric heating appliances. In the household and industry, the emergence and popularization of various varieties of electric heating appliances have been rapidly developed, especially in the household. So the invention of nickel-chromium alloy is to lay the foundation for the development of electric heating appliances industry.
