What is an electric furnace?

Who created the entry? Anonymous netizen

Overview of electric furnace

Electric stove is a kind of stove with electric heating device, which is mainly used for cooking and baking. Electric furnaces are very popular and have become a substitute for stoves using solid fuels (wood or coal) because stoves using solid fuels require more manpower to operate and keep burning. Some modern stoves will include built-in range hoods.

The heating part of the electric furnace can be controlled by a rotary switch. Generally, the rotary switch on the electric furnace has only a limited scale (for example, six), and rotating each position will produce different resistance, thus producing different heating power. Some electric furnaces use "Sukima Switch", the so-called "slow cooker". In addition, some electric furnaces will be equipped with thermostats.

Electric furnaces use electricity to generate heat energy.

Ethnicity

1859 on September 20th, George B. Simpson (English: George B. Simpson) obtained the U.S. patent #25532 with the patent name of "electronic heater" (English: electro-heater). Its surface is heated by a platinum wire coil and powered by a battery. According to George B Simpson, this invention can be used to "keep the room warm, boil water, cook food …".

In 1892, the Canadian inventor Thomas Ahern (English: Thomas Ahern) submitted the patent number 399 16, which was probably the equipment he used for cooking in the hotel in Ottawa. [3] An He Wo Yun Thorpe (English: Warren Y. Soper) is the owner of Ottawa Boiler and Power Company (English: Ottawa Chaudiere Light and Power Company). [4] The electric stove was exhibited at the Columbus Memorial Expo in Chicago in 1893. The exhibition also shows a model of an electrified kitchen. Different from gas stoves, the popularity of electric stoves is growing slowly, on the one hand, because it is a strange technology, and towns need electrification to use it. In the 1930s, the technology of electric stove gradually matured, so electric stove began to gradually replace gas stoves, especially in family kitchens.

1897, William Hardaway (English) obtained the American patent #574537, which was named "automatic control electric oven" (English).

1schematic diagram submitted on October 29th 1905, 165438+ At that time, David Kerr Smith obtained the Australian patent (No.4699/05) for the "electric cooking stove" he invented.

The early electric furnaces were not satisfactory because of the cost of electricity (compared with wood, coal or gas), the limited power provided by power companies, the poor constant temperature performance and the short life of the heating part. The invention of nickel-chromium alloy (in English: nichrome) for resistance wire improved the cost and durability of heating part. [6] Although three companies in the United States have introduced electric furnaces in 1908, the penetration rate of electric furnaces is very low. In the 1920s, the electric stove was still a novelty. Until the 1930s, the price reduction of electric power and the modernization of electric furnaces greatly improved the acceptance of electric furnaces.

Power companies sell electric stoves and other household equipment to increase power demand. With the expansion of rural electrification (English: rural electrification), cooking with electric stoves is very popular.

Electric furnace type

Karguli furnace

1905165438+1October, David Curle Smith, a municipal electrical engineer in Karguli, Western Australia, applied for a patent (Australian patent number. 4699/05), which is based on the design of gas stove, contains the same configuration as most electric stoves later: a flat baking tray. Kerr Smith's electric furnace has no thermostat, and the heat is controlled by the number of nine open components.

Kerr Smith's design was patented in 1906 and put into production in June of the same year. The whole production line was purchased by the power industry in Karguli-Boulder, which rented electric furnaces to residents. A total of 50 pieces of equipment were produced before the cost overrun caused the parliament to suspend the plan. This is a good time to produce household electric stoves, the purpose of which is to "cook with electricity" ... within anyone's ability. This kind of electric furnace has no ready-made products now, and many of them were used to extract copper during World War II.

In order to promote this electric stove, David Kerr Cole Smith's wife, H. Nora Curle Smith (formerly known as Helen Nora Murdoch, English: Helen Nora Murdoch), A member of the Murdoch family, who is very prominent in Australian public life, has written a cookbook, including operating instructions and 16 1 this cookbook. "Thermoelectric Cooking Easier" was published in1March, 907, which is the cookbook of electric furnaces in the world.

power consumption

The power consumption of the heating part of a typical electric furnace varies from 1 kW to 3 kW, depending on the size.