| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas warm-air furnace in which such a problem is eliminated that convection air is reduced, and extended combustion gas hits a heat- shield body to raise its temperature, and a front board is heated, in the case when a filter is clogged with dust. SOLUTION: A deflection heat-shield board 17 is provided between the top face of the heat-shield body 6 and an upper combusting guide 4. The board 17 prevents high-temperature combustion gas from being discharged to the direction of the heat-shield body 6, and the gas is deflected into the direction of warm-air outlet 11. Thus, the heat-shield body 6 is prevented from being heated by the high-temperature combustion gas 7, and the front board 16 is prevented from being heating to a high temperature. |
