Solutions to common problems with electric heaters

Solutions to common problems with electric heaters

1. Unable to heat up (the heating wire inside the electric heater is burnt out or the wiring terminal is disconnected)

2. Electric heating tube rupture or rupture (cracks in the electric heating tube, corrosion and rupture of the electric heating tube, etc.)

3. Leakage (mainly due to the tripping of the fully automatic isolation switch or leakage maintenance switch, and the inability to heat the electric heating tube), common faults in this type of situation generally account for more than 90% of common faults in electric heaters

Common troubleshooting methods for electric heaters:

If the electric heater cannot be heated and the electric heating tube is disconnected internally and cannot be repaired, the only option is to replace it; If the route or connector is short circuited or loose, it can be reconnected.

If the electric heating tube is broken or broken, then only replace the electric heating tube.

If it is a leakage, the leakage point needs to be determined and considered according to the situation. If it is the electric heating tube itself, it can be baked in an electric oven; If the resistance value of the insulation layer cannot be increased, it is very likely that the electric heating tube needs to be replaced; If the wiring terminal is leaking water, dry it with a hot air welding gun; If the transmission line is torn, it can be wrapped with tape or replaced with cables.

When the dielectric is heated in a high-frequency electric field, the electrical power absorbed per unit volume is P=0.566fE ε RTG δ× 10 (watts/centimeter)

If expressed in terms of heat, it is:

H=1.33fE ε RTG δ× 10 (calories/second · centimeter)

In the formula, f is the frequency of the high-frequency electric field, ε R is the relative dielectric constant of the dielectric, δ Is the dielectric loss angle, E is the electric field strength. According to the formula, the power absorbed by the dielectric from a high-frequency electric field is the square of the electric field strength E, the frequency f of the electric field, and the loss angle of the dielectric δ Directly proportional. E and f are determined by the applied electric field, while ε R depends on the properties of the dielectric itself. So the main objects of medium heating are substances with high medium loss.

Medium heating generates heat inside the dielectric (heated object), resulting in faster heating speed, higher thermal efficiency, and more uniform heating compared to other external heating methods.

Medium heating in industry can heat hot gel, dry grain, paper, wood, and other fibrous materials; It is also possible to preheat the plastic before molding, as well as vulcanize rubber and bond wood, plastic, etc. Choosing an appropriate electric field frequency and device can heat only the adhesive when heating the plywood, without affecting the plywood itself. For homogeneous materials, overall heating can be performed.