Types and working principles of heaters
Heater is a modern word and is a proper noun. It refers to a glass fiber reinforced refractory fiber layer wrapped around a multi-strand resistance wire, and a metal wire reinforced refractory fiber layer woven outside the refractory fiber layer. The device is made of stainless steel skin, the ceramic with a high degree of insulation and fire resistance is put on the resistance wire, and then it is formed by mechanical twisting, connected to the power supply, and can be used. The thermal efficiency can reach more than 90%, which is 1.5 times that of PTC heaters, and it is 2 times that of traditional electric wire heaters, which can save 30% of energy and electricity expenses.
There is another kind of stainless steel heater in the heater. This structure is not only advanced, high in thermal efficiency, but also generates heat evenly. When current flows through the high temperature resistance wire, the generated heat passes through the crystal magnesium oxide powder to the surface of the metal tube Diffusion, and then transferred to the heated parts or air to achieve the purpose of heating.
The oil tank heater has several heating characteristics: the oil will not have local high temperature and carbonization, which ensures the quality of the oil and the heat transfer efficiency of the heater. Long service life, corrosion resistance, high temperature resistance, high pressure resistance, anti-fouling function, greatly improve the overall performance of the heat exchanger. It can realize automatic control, and can control the steam feeding amount according to the oil inlet and outlet temperature and oil pouring flow. Avoid repeated heating of the oil in the tank, ensure the color of the oil, and reduce the cost of oil processing.
So are all heater principles the same? The general working principle is to use an alternating magnetic field to install a primary coil with a large number of turns and a secondary coil with a small number of turns on the same iron core. The input to output voltage ratio is equal to the coil turns ratio, while the energy remains the same. Therefore, the secondary coil generates a large current under low voltage conditions. The principle is that when a thick metal is in an alternating magnetic field, a current is generated due to electromagnetic induction. When a thick metal generates a current, the current will form a spiral flow path inside the metal, so that the heat generated by the current flow is absorbed by the metal itself, which will cause the metal to heat up quickly.
