PURPOSE: To facilitate the manufacture of the mixing tube of a gas burner and to make the mixing tube to suck and supply suffficient combustion air into a gas burner, by forming the mixing tube in the shape of a straight tube whose diameter it the same about all over the whole length of a tube.
CONSTITUTION: A gas burner 2 is composed of a cylindrical gas shut-off plate 4, a cylindrical wire net 5 inserted into the cylindrical shut-off plate 4, and a mixing tube 6 which introduces mixed gas C, which is the mixture of gas A and the air B, into a burner body. Besides, a fan assembly 3, under which an air guide plate 12 is arranged, is installed in the upper part inside of a hot-air introducing cylinder 11, and the air being sucked from an air intake 17 is fed into a louver 13 by a fan 16 with combustion gas. With such an arrangement, the negative pressure is produced inside of the cylindrical wire net 5, so that the mixed air can sufficiently be sucked into a burner body from the mixing tube 6.
NISHIHATA MASAAKI
ISHIKURA NAOKI
OOHASHI NORIYOSHI
