To understand the development of electric heating element, we must first understand the history of the development of electricity.
Human beings began to recognize the existence of electricity more than two thousand years ago, and then began to research and develop electricity. In 1660, human beings invented the world's first rotating friction test generator, but it produced static electricity, which was difficult to be used in practice.So the search continued.It wasn't until 1800 that Volt's deeper discovery of current led to the invention of the world's first battery;In 1821, Faraday invented the world's first dynamo and became the originator of the dynamo.And all subsequent generators are made on the same principle of electromagnetic induction.
Since then, mankind has changed from the theoretical era of electrical appliances to the era of electrical applications, and a variety of practical electrical appliances began to emerge one after another.
So what kind of resource is electric heating?
In fact, electric heat is the conversion of electrical energy into heat and use of the process.So when it was discovered that current can produce heat through wires, many inventors began to research and manufacture various electric heating appliances, which marked a milestone in the development of electric heating.
The following content we will respectively talk about the development of electric heating pipe in overseas and domestic
The electric heating appliance appeared in the 19th century, but it was still in its infancy at that time. Compared with the current products, it is very low in today's words. Moreover, the earliest products are mostly used for living electric heating appliance.In the late 19th century, Mr. Simpson produced and patented the world's first electric heating tube, which is now known as the electric heating tube.More technically, this electric heating element consists of a coil of metal wire armored inside a metal tube, which is insulated from the wire with ceramic insulation material to form a heating element.
But because of the lack of process equipment, so this electric heating tube can not be applied, and there was no suitable resistance wire as a resistance type of heating material, can only use iron wire or precious metal, friends in this industry know that because the resistivity of the wire is very small, to make high voltage is very difficult.If you use precious metals, the cost will be very high, so the development of electric heating pipe is very slow.The real boom in the electric heating industry came after the invention of nickel-chrome as a heating element.In the early 20th century, the United States first successfully developed the electric iron made of nickel-chromium alloy electric heating wire, which fundamentally improved the structure of the electric iron, so that it quickly gained popularity.Nichrome wire has the characteristics of high temperature resistance and high resistivity, and also has a wide range of artificial insulation materials.At this time has been equipped with the basic conditions of electric heating pipe production.The real development of electric heating tubes came during the First World War.
In 1917, American electrical engineer Edwin L.Wiegand invented the first electric heating tube with metal shell in the world, and established the electric heating tube factory named Wiegand Appliance with his own patent. In 1925, Japanese people produced POTS with electric heating elements, which should be the original form of modern electric rice cookers.At the same time, there are also electric heating products such as laboratory heating stoves and electric heating equipment in industry.From 1910 to 1925, the use of electric heating appliances in both domestic and industrial applications developed rapidly.This stage is the electric heating appliance cast aluminum heating, cast copper heating appliance in the history of the great development of the stage.
During this period, all kinds of electric heating appliances were redesigned and improved, various electric heaters were designed to be more beautiful, strong and durable, and most of them could be automatically controlled for temperature and time.At the same time, the production of raw materials have also been improved, such as the use of good quality A-grade nickel-chromium wire, the use of magnesium oxide powder as insulation materials.After the 1940s, due to the continuous progress of science and technology in the United States, more affordable electricity bills, and the continuous development of the global economy, electric heating appliances began to enter the daily life of the public.According to data, the household penetration rate of electric irons in the United States exceeded 90 percent during this period.
By the end of the 20th century, the 21st century, the electric heating pipe has entered the mature use stage, applied to civil, industrial, military and other fields.Such as electric kettles, electric irons, electric ovens, heaters and bath bullies.
With the continuous maturity of electric heating pipe manufacturing technology, manufacturers compete with each other, so that batches of more sophisticated products are constantly developed and widely marketed, so that people's production and life more fast, convenient, simple, safe.
So far more than one hundred years have passed, the electric heating element industry continues to develop, there are countless kinds, the development of electric heating tube has been developed from the beginning of the simple work for the equipment to play a pivotal role in the equipment.
