To provide a furnace capable of sending air by a blower in temperature rise in accompany with the generation of the steam of burned substance or in cooling the furnace without affecting the temperature rise in the furnace, and preventing the back-flow of air into the burning chamber in forcibly cooling the temperature in the furnace in cooling.
In the furnace comprising the air blower 2 for sending air to the furnace, a metallic cavity 5 having an exhaust port 9, a metallic door 8 mounted on the cavity, and the burning chamber surrounded by a heat insulating material mounted in the cavity, and provided with an air-bleeding hole for heat radiation, the air-bleeding hole for heat radiation 10 is formed on a position of a flow channel of air, and a nozzle cap 11 having Venturi effect is mounted at an outer side of the air-bleeding hole for heat radiation. An air guide 15 or an air duct is preferably formed from the air blower to the nozzle cap.
NOMURA EIJI
Hironori Honda
Toshimitsu Ichikawa
Takeshi Takamatsu
Yuriko Hamada
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