Combustion apparatus, and heating furnace using same

A heating furnace, comprising:

• a combustion apparatus including
• a combustion part provided with a combustion space for generating a combustion gas by burning a combustible gas and air, a combustible gas inlet opened to said combustion space for allowing said combustible gas to flow into said combustion space, an air inlet opened to said combustion space for allowing said air to flow into said combustion space, and a combustion gas outlet for discharging said combustion gas outside, and
• a regulated gas through channel part having a regulated gas outlet for discharging an uncombusted regulated gas prepared into a desired composition outside, said regulated gas outlet being adjacent to said combustion gas outlet and opened toward said combustion gas just after being discharged from said combustion gas outlet,
• wherein an angle between (i) a discharge direction of the uncombusted regulated gas discharged from the regulated gas outlet and (ii) a discharge direction of the combustion gas discharged from the combustion gas outlet is 5 to 90 degrees;
• and
• a housing chamber in which a housing space for housing a body to be heated is formed surrounded by a furnace wall with said combustion gas outlet and said regulated gas outlet of said combustion apparatus opened in said housing space.