Electric heating device is a common important component in electrical equipment, widely used in various fields, such as home appliances, industrial production and so on. They convert electrical energy into heat energy, and play a heating, temperature control and other functions. This article will discuss the working principle of electric heating devices and some common types in depth.

First, the working principle of electric heating devices

The working principle of the electric heating device is based on the resistance heating effect of the conductive material. The conductive material through which the current passes through the electric heating device will cause the electrical energy to be converted into heat energy due to the resistance of the material. Below we will introduce several common electric heating devices and their working principles.

1. Resistance wire heater

Resistance wire heater is one of the most common electric heating devices. It consists of a section of heated metal resistance wire, commonly used materials such as nickel chromium alloy. When the current passes through the resistance wire, due to the resistance of the positive wire, the electrical energy is converted into heat energy, causing the positive wire to heat up. This kind of heater is usually used in home appliances such as heaters and water heaters.

2. Heating cable

Heating cable is a kind of electric heating device with self-heating function, which is widely used in heating and anti-freezing fields. The heating cable is composed of one or more heating element cables, which generate heat energy through current. The working principle of this electric heating device is to use the current through the heating body cable, so that the cable is heated and the heat is transferred to the surrounding environment, which plays a heating role.

3. Thermistor

A thermistor is an electric heating device that changes the resistance value by changing the temperature. Its working principle is based on the thermal sensitive properties of the material. When the temperature rises, the resistance value of the thermistor will change, which can realize the temperature control function. Thermistors are widely used in the field of temperature measurement and control, such as temperature sensors, thermostats, etc.

Second, the application field of electric heating devices

Electric heating devices have a wide range of applications in various fields, the following we will introduce the application from the perspective of household appliances, industrial production, etc.

1. Home appliances

In the family, electric heating devices are widely used in various household appliances, such as electric water heaters, electric heaters, electric blankets and so on. These electric heating devices provide a warm and comfortable living environment for people through the heating function. In addition, electric heating devices are also used in kitchen appliances, such as induction cookers, microwave ovens, rice cookers, etc., for heating and cooking food.

2. Industrial production In industrial production, electric heating devices also play an important role. For example, electric heat pipes are widely used in injection molding machines, mold heating and other equipment for heating and maintaining a constant temperature to ensure the smooth progress of the production process. In addition, electric heating devices are also used in drying equipment, printing machinery, melting furnaces and other industrial equipment.