Heating coil is also known as electric heating coil and heating coil. It uses electric heating alloy wire as heating material and mica soft plate (sometimes ceramic core) as insulation material. Mainly used in electric kettles and other electrical appliances.

The heating ring is wrapped with thin metal plates (aluminium plate, stainless steel plate, etc.). Typical applications such as hot water bottles. The metal tubular electrothermal elements are cast in the aluminium disc or the aluminium plate or welded or embedded on the aluminium disc or the aluminium plate to form various shapes of the electric heating disc and the electric heating. Typical applications such as rice cooker, electric iron, electric coffee pot, etc.

Manufacturers of cast aluminium heating rings convert electrical energy into heat energy to heat objects. It is a form of energy utilization. Compared with general fuel heating, electric heating can obtain higher temperature (such as arc heating, temperature can reach more than 3000 C). It is easy to realize automatic temperature control and remote control. Vehicle-mounted electric heating cup

The heated object can be kept in a certain temperature distribution as required. Electric heating can generate heat directly in the heated object, so it has high thermal efficiency and high heating speed. According to the technological requirements of heating, it can realize uniform heating or local heating (including surface heating), and it is easy to realize vacuum heating and control atmosphere heating. In the process of electric heating, less exhaust gas, residue and smoke are produced, which can keep the heated object clean and not pollute the environment. Therefore, electric heating is widely used in production, scientific research and experimental fields. Especially in the manufacture of single crystal and transistor, mechanical parts and surface quenching, ferroalloy melting and artificial graphite manufacturing, electric heating is used.