There are many types of electric heating elements, conventional varieties, electric heating alloys, electric heating materials, microwave heating devices, electromagnetic induction heating devices, electric heating wires, electric heating plates, electric heating cables, electric heating cables, electric heating plates, electric thermocouples, electric heating coils, electric heating rods, electric Tracing cables, electric heating cores, mica heating elements, ceramic heating elements, tungsten and molybdenum products, silicon carbide rods, molybdenum powder, tungsten rods, heating wires, mesh belts, and many other types of heating elements.
Electric heating element
What is an electric heating element? Simply relying on its function is to convert electrical energy into thermal energy electrical components, which are the heart of electric heaters. An electric heating element is a type of element that realizes the conversion of electrical energy to thermal energy. Electric heating elements have played an important role in people's production and life since the day they came out.
Today we look at the advantages and disadvantages of electric heating elements.
Heating wire
Electric heating wire is the earliest electric heating element, which uses electric heating as the basic working principle to realize energy conversion. The heating wire is the most traditional heating element, but it has not been replaced so far. Now the heating wire is still widely used in various fields, especially industrial production and laboratories.
The heating wire is mostly iron-chromium-aluminum alloy and chromium alloy, and the maximum temperature of iron-chromium-aluminum alloy has reached 1400 degrees Celsius. On the basis of heating wires, heating elements such as heating rods, heating plates, and heating sheets have been developed, but their essence is still heating wires, and their principles cannot be separated from electric heating.
The electric heating wire has the advantages of high heating temperature and heat-resistant temperature, mature technology, easy manufacture and convenient application to various electric heating equipment.
The disadvantage of the heating wire is that its energy conversion rate is low, and the heating process is accompanied by the light-emitting process, so the electric energy conversion rate can only reach 60% to 70%.
PTC heating element
The full name of PTC is Positive Temperature Coefficient, that is, thermistor, which is an electric heating element made of conductive materials through composite sintering. The PTC heating element is a kind of heating element that appears after the heating wire. It is limited by the Curie temperature and can only be used for heating below 350°C. It is applied to various low-power low-temperature electric heating equipment.
The advantage of PTC heating element is that there is no open flame when heating, and the heating power can reach 70%.
The disadvantages of PTC heating elements are poor shock resistance and cannot be cut and used at will. In particular, heating elements are limited by the Curie temperature and cannot be used for heating above 350°C. Therefore, the application of PTC electric heating elements in actual production and life can only be limited to the field of low-temperature heating.
Conductive coating
Conductive paint, also known as black film, was produced in the late 1950s and can be used as an electric heating element after being sprayed on the surface of an insulating material. The conductive material itself has many uses, but it has fewer applications as an electric heating element.
The advantages of conductive coatings are surface heating, large heat dissipation area and good shock resistance.
The disadvantage of conductive paint is that the heating layer is easy to fall off, and it can only be used for heating below 200°C.
Electric heating film
The electric heating film is a new type of electric heating element, which is manufactured by absorbing the characteristics of two electric heating elements, PTC and conductive paint. Electric heating film is currently mainly used in indoor heating and environmental temperature maintenance, such as building heating, brooding room insulation, etc.
The advantages of electric heating film are no open flame heating, less surface heating resistance, fast heat conduction, long service life, and easy cutting.
The above is the introduction of some of the most common electric heating elements in life. Contact Reheatek, we will answer your questions in the process of using electric heating elements.
