The difference between electric heating wire and electric heating tube
Someone asked: What is the difference between electric heating wire and electric heating tube? Today, let's introduce the difference between electric heating wire and electric heating tube.
1. The difference between the heating principle of electric heating wire and electric heating tube
Heating wire: generally used in closed spaces, because the surface of the heating wire is charged when the heating wire is heated by electricity.
Electric heating tube: It can normally be used in any electric heating environment, air and liquid can be used, because it is tightly filled with magnesium oxide powder between the heating wire and the shell of the electric heating tube, so the surface of the electric heating tube is non-conductive, and the electric heating tube is truly It is also the heating wire placed inside the heating tube that generates heat.
Second, the heating cost difference between electric heating wire and electric heating tube
The electric heating wire is closely related to the electric heating tube. From the production process of the electric heating tube, it can be seen that the electric heating wire is the raw material of the electric heating tube, so the electric heating wire has a lower cost than the electric heating tube. The heating wire is made of high resistance alloy wire, called electric heating alloy. , The commonly used heating wire generally has a resistance of several ohms to several tens of ohms.
3. The difference between the safety of electric heating wire and electric heating tube
Because the heating wire conducts electricity, when the bare heating wire is used for direct heating, it can only heat insulating things such as air, at least with ceramics or a certain air gap, etc.
Insulation measures are separated from the conductors. The heating wire is low in cost but not as safe as the electric heating tube.
But why is the heating wire not short-circuited? A short circuit refers to the state where the current is infinite when the resistance approaches zero. The heating wire has a large resistance and a fixed melting point. The current when the heating wire reaches the melting point is called the fusing current, but the circuit inside the electric heater can ensure that the current is less than the fusing current, so the heating wire in the electric heater can work normally.
Fourth, the performance difference between the electric heating wire and the electric heating tube
The interior of the electric heating tube is filled with insulating material between the heating wire and the metal tube wall, so the electric heating tube can heat conductors and non-conductors.
