Infrared heating tube is a tube heater that uses infrared ray principle. It has the characteristics of excellent quality, high thermal efficiency, high power density, rapid heating, power saving, long life, etc. It is a rapidly developed energy-saving heating technology in the 1980s, which has been listed as a key promotion project in China, and has achieved gratifying economic benefits. Infrared is widely used in industrial heating or drying, such as automotive, plastic, printing, glass, textile, food, metal parts, circuit board packaging, film and electronic field surface heating drying curing process. Quartz near infrared, far infrared using transparent or translucent quartz. Glass as lamp shell can produce near infrared or far infrared radiation spectrum. Infrared ray is a kind of electric wave, it propagates at the speed of light, carries very high energy, the radiation intensity and wavelength of different types of infrared ray of the same power are different and the intensity is different. 1, the long wave infrared ray (that is, far infrared) has the characteristics of fast heating speed, uniform heating, low thermal inertia, only 1 ≤ 3 minutes to reach the constant temperature time of the element, the efficiency of power radiation conversion is 60% ≤ 75%, and the cold and hot infrared ray (far infrared) has the characteristics of fast heating speed, uniform heating, low thermal inertia, only 1 × 3 minutes to reach the constant temperature of the element, and the energy radiation conversion efficiency is 60% ≤ 75%. Energy saving service life is long. 2, shortwave infrared (near infrared) its characteristics: it has 1 ≤ 3 seconds heating and cooling time, so that the heating process can be controlled. The system is more flexible. Efficient and durable whitening or gold coating can achieve more than 70% radiation efficiency and long service life, generally more than 5000 x 10000 hours. Especially, it is widely used in drying and curing, drying and heating of mechanical equipment with fast assembly line. Plastic, water, coating and other solvents can quickly heat the surface of the object, and it can be absorbed by water film to achieve drying effect.