Three types of electric heaters

Whether it's insulation or heating, production processes often utilize electric heaters to assist in the process. Electric heaters are extremely common. Today, we'll discuss metal electric heaters, which can be categorized into three types based on their housing and insulation.

One type is the metal mica heater, which primarily utilizes a high-dielectric nickel-nobelium alloy heating wire as the heating element, wound around natural or synthetic mica sheets as insulation. The outer layer is machined into various shapes, such as heating coils and plates, depending on the user's choice of metal sheet as the conductive heating element. Typically, the surface load power of this metal heater should be between 2.5 and 3 W/cm². Users can adjust the load power and heating temperature using an automatic temperature control system to ensure the heater's lifespan.

Another type is the cast metal electric heater, which primarily utilizes a metal tubular heating element as the heating element. These heaters are manufactured by bending and forming the heating element according to the user's specifications and shape, then molded into various shapes of cast aluminum, cast copper, or cast iron. Due to their advantages of rapid heating, uniform heating, excellent thermal conductivity, and long service life, these electric heaters have become ideal for heating applications in the plastics industry.

In addition, tubular heating elements also fall under the category of metal electric heaters. Their structural characteristics include a metal outer shell with a nickel-nodule alloy heating wire spiraling along the center of the tube. Depending on the desired voltage, power, and resistance of the heater, they are widely used in shrinking furnaces, hot-spot furnaces, drying equipment, hot pressing, food processing, barbecues, and household appliances.

The heating element determines the heating efficiency and applicable applications of the electric heater. This concludes our discussion of the three types of metal electric heaters. Thank you for your reading.