What is the working principle of infrared emitters and how many types are there?

Infrared emitter is often used as a heating device, and due to its rapid and good heating quality it has won the favor of many manufacturers. If we need infrared heating,we would better have a basic understanding about its working principle and some types of emitters. Let us have a look!

 

 

The working principle of infrared emitter and advantages:

1. When the current passes through the infrared emitter, the heating filament will radiate infrared electromagnetic waves of a certain wavelength. When the infrared electromagnetic waves are absorbed by the object, the object is quickly heated. This way of heating is called infrared radiation heating.

2. Since each material has different absorption capabilities for different infrared wavelengths, by changing the winding method and material of the heating filament, different wavelengths can be emitted in order to adapt to different materials,. At present, the commonly used infrared emitters mainly include short-wave wavelengths of about 0.76-2.0um, medium-wave wavelengths of about 2.0-4.0um, and long-wave wavelengths greater than 4.0um.

3. Because the thermal inertia of infrared radiation is very small and the thermal efficiency is very high, short-wave and medium-wave infrared radiation technology can be used to heat the work piece with high density, high energy and high intensity, thereby improving the heating quality, shortening the heating time, and reducing heating energy consumption.It can help save production costs and reduces environmental pollution.

 

Specific types of infrared emitters:

1, short-wave infrared emitter

Infrared emitters with wavelengths between 0.76 microns and 1.4 microns are called short-wave infrared emitters. Their filament temperature is between 1800°C and 2600°C, and the standard service life is about 5000 hours. It is characterized by very small thermal inertia, rapid heating, and high heating efficiency. Short-wave infrared emitters have good heating performance for metal products.

2, mid-wave infrared emitter

Infrared emitters with a wavelength between 2.0 microns and 4.0 microns are called medium-wave infrared emitters. Its filament temperature is between 800°C and 950°C, and the standard service life is about 15000-20000 hours. This product has the characteristics of low cost, high strength, long service life, etc., and has good heating performance for most materials such as water, plastics, and organic materials.

3, fast mid-wave infrared emitter

Infrared emitters with wavelengths between 1.6 m and 2.0 microns are called fast mid-wave infrared emitters. Their filament temperature is between 1400°C and 1800°C, and the standard service life is about 7000 hours. The fast mid-wave infrared emitter has good heating performance for most materials, and combines some of the characteristics of short-wave products and mid-wave products. It is a highly versatile product.