The heating element of the air duct heater is a stainless steel electric heating tube, and the inner cavity of the heater is equipped with a plurality of baffles (deflector plates) to guide the flow direction of the gas and extend the residence time of the gas in the inner cavity, so that the gas is fully heated, the gas is heated uniformly, and the heat exchange efficiency is improved. The heating element of the air duct electric heater stainless steel heating tube is made by filling the heating wire in the seamless steel pipe, and the void part is filled with magnesium oxide powder with good thermal conductivity and insulation.
When the current passes through the high-temperature resistance wire, the heat generated diffuses to the surface of the heating tube through the crystalline magnesium oxide powder, and then is transferred to the heated gas to achieve the purpose of heating.
