We know that electric heating pipes can be used in many aspects of life, including but not limited to electric kettles, rice cookers, electric water heaters, electric faucets, boilers, and paint booths.
To understand the development of electric heating tubes, we must first understand the historical development of electricity.
Mankind began to recognize the existence of electricity more than two thousand years ago, and then began to research and develop electricity. By 1660, mankind invented the world's first rotating friction test generator, but it is very difficult to generate static electricity. Is actually used; so people continue to explore. It was not until 1800 that Volt discovered a deeper electric current and invented the world's first battery; in 1821, Faraday invented the world's first generator and became the originator of the generator. And the generators since then are all made with the same principle of electromagnetic induction.
Since then, mankind has changed from the era of theoretical electrical appliances to the era of electrical appliances, and various practical electrical appliances have begun to emerge one after another.
So what kind of resource is electric heating?
In fact, electric heating is the process of converting electrical energy into thermal energy and using it. So when the phenomenon that electricity can generate heat through wires was discovered, many inventors in the world began to research and manufacture various electric heating appliances, and the development of electric heating thus opened a milestone.
In the following content, let’s talk about the development status of electric heating tubes abroad and domestically.
Electric heating appliances appeared in the 19th century, but they were still in their infancy at that time. Compared with current products, they are very low in current terms, and most of the earliest products are used for living electric heating appliances. In the late 19th century, Mr. SIMPSON produced the world's first electric heating tube and obtained a patent for this product. This is the well-known electric heating tube today. More professionally, this kind of electric heating element is composed of a coil-shaped metal wire armored in a metal tube, and the metal tube and the metal wire are insulated with ceramic insulating materials to become a heating element.
However, due to the lack of process equipment, this kind of electric heating tube could not be used, and there was no suitable resistance wire as a resistance heating material at that time. Only iron wire or precious metal can be used. Friends in this industry know that due to the resistance of iron wire The rate is very small, and it is difficult to make a high voltage. If precious metals are used, the cost will be very high, so the development of electric heating tubes is very slow. The rapid development of the real electric heating appliance industry was after the invention of the nickel-chromium alloy used as an electric heating element. At the beginning of the 20th century, the United States first successfully developed an electric iron made of nickel-chromium alloy heating wire, which fundamentally improved the structure of electric irons and quickly gained popularity. Nickel-chromium alloy heating wire has the characteristics of high temperature resistance and high resistivity, and there are also widely used artificial insulating materials. At this time, the basic conditions for the production of electric heating tubes are already available. The real development of electric heating tubes was during the First World War.
In 1917, the American electrical engineer Edwin L. Wiegand invented the world's first metal shell electric heating tube, and created an electric heating tube production plant named after his own patent with his own patent— -Wiegand Appliance By 1925, the Japanese produced pots with electric heating elements. This should be the original form of modern rice cookers. At the same time, electric heating products such as electric heating furnaces and electric heating equipment for laboratories have also appeared in the industry. From 1910 to 1925, the application of electric heating appliances in households and industries developed rapidly. This stage is a major development stage in the history of electric heating appliances for cast aluminum heating and cast copper heating appliances.
In this stage, all kinds of electric heating appliances have been redesigned and improved. Various electric heaters are designed to be more beautiful, sturdy and durable, and most of them can automatically control temperature and time. At the same time, the raw materials produced have also been improved, such as the use of high-quality A-grade nickel-chromium wire and the use of magnesium oxide powder as an insulating material. After the 1940s, because of the continuous advancement of science and technology in the United States, the more affordable electricity bills, and the continuous development of the global economy, electric heating appliances began to enter the daily life of the general public. According to statistics, the penetration rate of electric irons in American households exceeded 90% during this period.
By the end of the 20th century, in the 21st century, electric heating tubes have entered a stage of mature use and are used in various fields such as civil, industrial, and military. Such as electric kettles, electric irons, electric ovens, heaters and bath heaters.
With the continuous maturity of the manufacturing technology of electric heating tubes and the competition between manufacturers, batches of more sophisticated products have been continuously developed and widely introduced to the market, making people's production and life faster, more convenient, simpler and safer. .
More than one hundred years have passed so far, and the electric heating element industry has continued to develop, with countless types. The development of electric heating tubes has evolved from simply working for equipment at the beginning to playing a pivotal role in equipment.
Overview of the development of electric heating tubes in my country
Due to the turbulent domestic situation before liberation, the electric heating appliance industry has been in a very backward state, and it has not been continuously developed until after liberation.
The following is an excerpt from an introduction on the Internet about the development of domestic electric heating pipes
"At the end of the 1950s, electric heating elements began to rise in my country and began to develop rapidly. In 1958, my country had the first home appliance heat pipe factory—Shanghai Electric Heating Appliance Factory, which was the first domestic manufacturer to produce electric heating elements. Later all over the country. Electric heating tube factories have been opened one after another, especially in 2008, reaching their peak. So far, according to incomplete statistics, there are tens of thousands of electric heating tube manufacturers in my country, among which the more famous ones are
Sino-Japanese Electric Heating, Hangzhou Hehe, Hangzhou Zoppasi, Zhenjiang Dongfang Electric, Ningbo Sena, Changzhou Cimat, etc.
Today, after decades of continuous development, the application fields of electric heating pipe products include electric water heaters, microwave ovens, ovens, electric kitchenware, electric kettles, dishwashers, refrigerators, dryers, air conditioners and other household appliances. Especially in recent years, the product variety, quantity and application penetration rate have entered a stage of rapid progress.
Due to the development of society, the product structure of electric heating tubes has also developed with the continuous development of electric heating application technology, engineering technology, material technology and equipment technology. Especially in the rapid development period of today's electric heating elements, electric heating tubes are used as electric heating element series. One of the main representative products in the market is becoming more and more widespread and popular; however, there are still many unsatisfactory places and problems in the related technical research, production and manufacturing process and actual use of electric heating tubes and their products. , Still need the joint efforts of relevant technical personnel, national departments, scientific research units, universities, and manufacturing enterprises.
Therefore, the changes of the times and the advancement of science and technology are also the fundamental reason for the direct development of electric heating tubes and also play a positive role in promoting electric heating tube enterprises. "
Electric heating tubes have a wide range of application fields, and the varieties on the market are also various, and the heating equipment of electric heating tubes has great advantages compared with other heating equipment. Therefore, the development prospects of electric heating tubes are still very broad. The following is simple Summarize several reasons why electric heating tubes can be widely used.
1. The manufacturing process is relatively simple. Although the manufacturing process of the electric heating tube is simple, it cannot tolerate a slight sloppy. Its core lies in the internal resistance wire, magnesium oxide powder and tube material. The quality of the material is also a factor that determines the quality of the electric heating tube.
2. The cost is low. The price of the electric heating tube is not high. The materials used are basically stainless steel, which has good electrical performance. Long-term use can save a large part of the cost of the enterprise.
3. Convenient and convenient operation The electric heating tube is convenient and simple to use, as long as it can be energized and heated, the heating effect of the current can quickly raise the temperature to the effect we need, which is much more convenient than the old heating method.
4. High working efficiency The electric heating tube works by converting electric energy into heat energy through electric current. Through the adjustment of power, it can basically meet our demand for high temperature.
The development trend of electric heating tube
The development of electric heating was first invented and created by developed countries, and then gradually spread to the world; from small-scale industrial use to household personal use; the product has continuously developed from simple structure to complex and sophisticated structure; from single function to multiple Functions and gradually develop towards intelligence.
With the development of artificial intelligence in the future, whether the electric heating industry will usher in changes in the future, let's go ahead and explore!