Principle and Advantages of Infrared Heating

Ⅰ. The principle of infrared lamp heating

Whether infrared heating is effective or not depends mainly on the degree of absorption of the heated object. The higher the absorption rate, the better the infrared radiation effect. The absorptivity depends on the type of the heated substance, the surface state, the wavelength of the infrared radiation source, etc. The ratio of the radiant energy reflected by a substance to the incident energy is called reflectivity. Different materials and different surface conditions have different reflectivity.

The radiant ratio energy transmitted by a substance to the incident energy is called the transmittance, which varies with the nature and thickness of the material. The effective penetration range of different materials is different. The penetration rate of non-transparent materials is usually regarded as zero. Generally, metal crystals are very dense, and the electromagnetic radiation passing through the surface decays rapidly within a short distance. Therefore, the penetration depth of heat radiation to the metal is on the order of micrometers. The molecular structure of non-metallic materials is not very dense, and different non-metallic substances have their characteristic vibration frequencies at room temperature. Therefore, it is rarely reflected when the incident electromagnetic wave reaches the interface. It is easier to pass through the interface and enter the surface layer, and some of them are changed into heat by resonance. Some of the ones that cannot stimulate resonance are subjected to refraction, scattering, and reflection. Since actual objects are not simple substances with a single structure, some radiation waves that are not absorbed by the surface will be absorbed by the resonance of other substances to varying degrees during the deepening process. Only when it passes through the entire thickness, the part of the radiant energy that is not absorbed can pass through. Therefore, the penetration depth of non-metal infrared heating lamp tube is higher than that of metal.

Ⅱ. The advantages of infrared lamp heating

1. The heat transfer is effortless, and direct-no contact or air, water, and other media are needed.

2. The heating system can be easily integrated into the production line by applying an infrared radiator or heating system. External heating and production can be controlled simultaneously.

3. The use of infrared heating is economical and accurate-choose the right heating tube, the heating process will be more effective and reduce energy waste.

4. Infrared radiation is safe and environmentally friendly-the radiator can be quickly turned on or off, which helps reduce the loss of radiant energy.