The heating element was heated by infrared ray. The infrared ray is radiant heating. And it transfers energy through radial. the radial wavelength was range from 0.7 micron to 80 micron. It goes beyond the people's eyeable range. For the infrared machine was irradiated in the object. It can make the object's molecule resonant absorbed. The absorbent infrared energy leads the object molecule to vibrate and heating. This radiant heating way is high effcientive in heating, solidifying and drying way.