| 摘要 |
PROBLEM TO BE SOLVED: To provide a warm air heater capable of complete combustion of a fuel and of excellent heat exchange. SOLUTION: A warm air heater 100 is adapted such that a primary heat exchanger 6 including a combustion furnace 12 in a cylindrical air tunnel having opposite ends closed, a nozzle 15a of a burner 15 is adapter to face the interior of the combustion furnace 12 to combust a fuel injected from the nozzle 15a into the combustion furnace 12 and introduce air into the air tunnel 1 with the aid of air fans 3, 4 and then feed warm air from a blowoff outlet 1a in the air tunnel. In the warm sir fan, a heat storage plate 21 having a heat insulation and a material quality to which a fuel is likely to adhere is disposed at a position where it receives the fuel injected from the nozzle 15a and receives a flame formed with combustion. Further, a secondary heat exchanger 7 into which combustion gas flows from the primary heat exchanger 6 is disposed in the air tunnel 1, and air introduced into the air tunnel 1 with the aid of the air fans 3, 4 is heat exchanged and heated between the primary and secondary heat exchangers 6, 7.
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