| 摘要 |
PURPOSE:To increase the amount in heat transfer from a primary combustion chamber and decrease the NOX amount in the combustion by providing a plurality of flame holes in the side face of a flame hole section and directing the primary flame in the horizontal direction. CONSTITUTION:A plurality of slit-shaped flame holes 8 are provided in the side face of a flame hole section 6 to form flames substantially in the horizontal direction. A gas mixture of fuel and air supplied from a gas mixture chamber 5 starts combustion at each of the flame holes 8 from the flame hole section 6, and the combustion flame collides with the inner wall face of the primary combustion chamber 2 and the direction of flame flow is changed upwards and goes to the upper section of the primary combustion chamber. During this the combustion is carried out incompletely with a shortage of oxygen and a combustion gas is formed. This combustion gas is supplied the secondary air that flows in from an air intake opening 11 near the secondary flame hole section 7 through the gap 4, and further the makes secondary combustion in the space constituted of the secondary combustion chamber and a guide plate 9 to complete combustion.
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