Structure of tubular electric heater element

The typical structure of metal tubular electric heating pipe is generally composed of five parts: insulator, sealing material, lead out rod, filler, electric heating wire, metal protective sleeve and terminal.

The spiral heating wire and lead out rod are located in the center of the metal protective sleeve. Its manufacturing process is to thread the spiral heating wire into the seamless steel pipe, copper pipe or aluminum pipe, and the gap is evenly filled with insulating and heat-conducting oxide media, such as crystalline magnesium oxide powder, through a multi tube filling machine. Then use the pipe shrinking machine to shrink the pipe diameter, so that the oxide medium is dense, so as to ensure that the heating wire is isolated from the air, and the central position does not shift and touch the pipe wall. So. The calorific value per unit area can be increased by more than ten times. The service life can also be correspondingly increased to more than 10 years. Compared with electric heating elements with the same large heat, tubular electric heating tubes can save 5% of electric heating materials, and the thermal efficiency can reach more than 90%.

From the structure of electric heating tube, metal tubular electric heating tube is the most widely used sealed electric heating element with simple structure, reliable performance and long service life. It can be successfully used in industry and household appliances, and is more and more widely used.