To obtain a far infrared ray radiator in which heating performance upon heating with a burner is improved and far infrared rays are effectually radiated.
A far infrared ray radiator 78 comprises a cylindrical main tube 78A and a sub tube 78B, and a burner is coupled with one end of the main tube 78A. A tip end portion of the sub tube 78B is closed with a closure plate 79, and exhaust holes opened to the side of the main tube 78A are provided at a plurality of positions in a side wall facing the main tube 78A. As a result, hot air from the burner not only heats the main tube 78A and the sub tube 78B from the interior but is also injected from an exhaust hole again directly onto the outer peripheral surface of the main tube 78A to again heat the main tube 78A. Thus, the far infrared ray radiator 78 can effectually utilize hot air from the burner without wastefulness, whereby heating performance is improved and the far infrared rays can be effectually radiated.
MATSUYAMA AKIYOSHI
TAKEDA TOSHIHIRO
YUKI KENJI
SHIDA SHINGO
