Electric heater

Heat is the process of converting electrical energy into heat energy. Since the discovery of the power supply through the conductor can occur after the thermal effect, many of the world's inventors engaged in the research and manufacture of a variety of electric appliances. Electrothermal development and popularization also with other industries, follow such a rule: from the advanced countries gradually extended to all the countries in the world; from the city to the progressive development of rural; by the collective use development to the family, and then to the individual; products from low-grade to high-grade. In the 19th century in the embryonic stage of electric appliances are mostly poor, appears the earliest is for the life of the electric appliances, 1893 provide iron of the prototype of the first in the United States appeared and use, and then to use the cooker in the 1909, that is electric heater is placed in the stove, also is to say that the heating from the firewood transferred to electrical, from electric energy is changed into heat energy. But the rapid development of the real electric appliance industry, it is used as a heating element in Ni Cr alloy of the invention. In 1910, the United States developed the first success with Ni Cr alloy wire production provide iron, which fundamentally improve the Dianwei bucket structure and use comfort bucket quickly gained in popularity. To the 1925 electric heating element is installed in the pot products in Japan, has become a modern electric cooker. There is also in this stage of industrial laboratory furnace, furnace, electric heater and other products melt. Self deception in 1910 as 1925 domestic and industrial aspects of electric appliances of various varieties and the universal application of rapid development, especially in the aspect of family why is electric appliances in the history of the development stage. So the invention of the Ni Cr alloy is the foundation of electric appliance industry development.

Twenty years later in the new application development is not on a period of more, but in this stage all kinds of electric heating appliances have been re established and continuously improved, become the history of electric appliances to improve the stage. In terms of household electric appliances, all kinds of devices are designed to be more beautiful, durable and sturdy, and most of them have automatic temperature and time control, so use wisely, durable and sturdy, and most of them have automatic temperature and time control, so the use of not suitably, temperature differences and the possibility of disaster can be exempt. As the electric cooker, ladle heater, Flapjack have automatic control device. At the same time also improved manufacturing materials, such as the use of a nichrome wire of good quality limit, with Magnesium Oxide or zirconia for insulation etc.. In industry, and household heating appliance, using the automatic control device and use good materials, such as wax melting pot, melting lead smelting furnace, a variety of large-scale ovens, heat treatment furnace, and so on have been improved and applied widely. After forty years, due to the scientific and technological progress in the United States, electricity is cheap, made war money, income is relatively high, contributed to the popularity of electric heating appliances. In 1940 in the United States provide iron household penetration rate of about%. Due to the rule of the imperialist aggression and the reactionary clique, the electric appliance industry has been in a very backward state before liberation. After liberation, it has been continuously developed, especially in recent years, it has entered a stage of rapid development in product variety, quantity and application.