In the infrared technology (IR) ohmic resistances, usually in the form of wire coils, are heated by electricity.
According to Wien's Displacement Law, as a result of warming, the emitted electromagnetic waves (infrared rays) have a shorter wavelength, the higher the surface temperature of the radiator is.
Today the market primarily offers 5 different emitter types (see Figure).
Generally it can be said, that the penetration depth of electromagnetic radiation into the material to be heated increases with decreasing wavelength.
Visually shortwave radiators can easily be recognized by their property to emit visible light, while medium wave emitters such as Ceramic heaters don’t.
Depending on the choice of the IR emitter types and duration of application of radiation surface disinfection processes or baking processes can be realized with the IR drying technology.
Depending on the choice of the IR emitter types and duration of application of radiation drying processes, surface disinfection processes or baking processes can be realized with the IR technology. Because of the greater depth of penetration the IR technology is a good sterilization method for dough pans in the baking industry. Germs such as fungi can settle in the depths of the felt mats of dough pans and are no longer reached by UVC rays.
All infrared emitters can be regulated in their performance. The usual method of control is the pulse-pause control via thyristors (Solid State Relays).
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