The heating element used in a normal stainless steel electric heating tubular is generally a dry heater. The most common one used in dry-burning heater is the cartridge heater. The difference between the finned electric heating element and the conventional electric heating element is that it has a heat sink, and the heat sink plays a heat dissipating effect, so that the surface temperature of the heating tube is not high, so that the life of the heating tube is prolonged. The most important component is the heating wire, which is the core part of the carbon steel electric heating tube. Without the heating wire, the stainless steel electric heating tubular loses its value. One of the most important parameters of the heating wire is the resistance value, which determines the power of the electric heating tubular heater. The resistance of the electric heating tubular is fixed, and the different working voltages are applied, and the effects of different electric heating elements are generated, and the thermal effect is also the same. Generally, the larger the resistance, the smaller the wire diameter of the resistance wire. When the voltage is fixed, the current passing through the resistance wire is larger. When the current passing exceeds the load of the resistance wire, it is easy to break and damage, so the resistance of the electric heating tubular Not the bigger the better, you should choose the appropriate resistance wire according to the actual situation and to ensure normal use. So how is the resistance confirmed?
First of all, it is determined that the resistance value is determined according to the rated voltage and rated power provided by the customer. By formula: voltage * voltage / power = resistance. In this way, judge the cold resistance value of the carbon steel electric heating element after the completion.
Finally, it should be noted that the surface load of the electric heating tubular is not over-standard, and generally cannot exceed 1.5w/cm2.
It can be seen from the above that when we choose the resistance value of stainless steel electric heating tubular, we mainly rely on the rated voltage and rated power provided by the customer. At the same time, we must also consider the bearing capacity of the surface of the resistance wire. From the point of view of the shape of the heating element, the most commonly used ones are the fin type heating rod, the cartridge heater, and the fin heater for the oven, thereby ensuring the service life of the electric heating element.