Classification of electric heaters and precautions for use

Electric heater, its function is simply to be used for heating, and it is also a much more used heating device or equipment. What are the heating modes in the electric heater?

Resistance heating

Using the Joule effect of current, the electric energy is converted into heat energy, which can be used to heat the object, and it can be divided into two kinds: direct and indirect. The former belongs to internal heating, so its heat efficiency is high and the operation is simple and convenient. The latter, because of the small resistivity and resistance temperature coefficient, need to use the pressure regulating device during the operation, which can be applied to some special occasions.

induction heating

It is the thermal effect formed by the induction current produced by the conductor, so that the conductor itself is heated, which has three kinds of power frequency, medium frequency and high frequency.

Induction heating can not only heat the whole body uniformly, but also heat the surface layer, and it can also carry out any local heating. So it still has many uses.

Medium heating

It is to use the high frequency electric field to heat the insulating material, so its heating object is mainly the dielectric. In industry, it can heat the gel, paper, wood and so on, as well as plastic. For some homogeneous materials, it can be heated as a whole.

Types of electric heaters

If the use of the environment to divide, electric heaters can be divided into two types of explosion-proof and ordinary type.

If the use is divided, electric heaters can be divided into two types: Industrial and civil.

In addition, there are some other types, such as air electric heaters, air duct electric heaters, and so on.

Safety common sense of electric heater

The resistance wire in the electric heater containing nickel, chromium alloy, and the heating temperature reached 800 degrees above, but its power is relatively large, so if the improper use of words, so it is easy to fire, so we must use Caution!, cannot be careless.

As for the safety of electric heaters, we should do what we should do:

The flammable objects can not be placed near the electric heater, with a certain safe distance, and the electric heater should be placed on the non heat and flammable base.

The electric heater should be watched in use when it is used. If you want to leave, the power supply should be pulled out and then left.

The resistance wire in the electric heater should be checked regularly, if the damage should be changed in time.

Precautions for the use of air duct electric heaters

Before the heat is made, the relevant components should be checked and whether they are in normal condition. The electric heater can be put into use after all the inspection has no problem.

The voltage of the power supply should be in accordance with the voltage of the electric heater. Moreover, it is necessary to connect the control circuit correctly.

All terminals in an electric heater shall be checked to be firm and should be treated with grounding.

At the end of the inlet of the electric heater, filters should be installed to avoid foreign matter entering the heating tube, etc., thus affecting the service life and heat dissipation performance of the electric heater. Furthermore, the filter should be cleaned regularly.

The wiring end of the electric heater should have a certain distance in the installation. Generally, it can not be less than 1 meters, so it is convenient to carry out the maintenance and maintenance work.

Precautions of electric heater

The grounding treatment should be done when the electric heater is connected.

If there is no flow in the electric heater, it can not be used to burn out the bad electric heater.

After the electric heater stops working, the temperature should be cooled first in order to avoid the other temperature too high to be scalded.