| 摘要 |
PURPOSE:To enable a combustion control in case of using soil fuel by providing a forced and flow means which sucks the exhaust gas to discharge outside by means of a forced airstream in a chimney with an automatic exhaust valve which opens automatically corresponding to an exhaust pressure, so as to promote the gasification and combustion of solid fuel by an automatic suction of primary and secondary air. CONSTITUTION:When the solid fuel 7 sch as sawdust on a grate 10 is fired and an inducing fan 38 which is a forced air flow means is driven to inject forced air out of a discharge tube 40 in the direction indicated by an arrow in the upper part of an accompanying drawing, negative pressure is produced due to the forced airstream in the chimney 36. This negative pressure is transmitted to a primary and a secondary air supply port 16 and 26 via a discharge port 42 and a hot air passage 24. Accordingly, primary air for gasification and secondary air for combustion are sucked and supplied as necessary out of the primary air supply port 16 and secondary air supply port 26 respectively. Under the supply of the primary air, the solid fuel 7 is dired and gasified, reforming into unburnt combustible gas. This combustible gas passes through the hot air passage 24 from the slits 14 of grates 10, joints with the secondary air introduced in and flowing through the hot air passage 24 and burns in the flame. |
