| 摘要 |
PURPOSE:To prevent deformation in the combustion chamber due to heat and maintain excellent combustion characteristics in it by constituting at least high temperature sections in the upper middle sections of a combustion chamber with a plurality of multi-hole plates and providing small projections in the joining sections of the multi- hole plates to provide small gaps among the multi-hole plates and by the difference in the positions of installation of the small projection bodies. CONSTITUTION:Multi-hole plates 14a and 14b that form a flat combustion chamber 15 are completely separated into groups of a plurality of plates, and the multi-hole plates 14a and 14b that are inserted into a support 13 of rail shape are prevented from slipping downwards by means of stoppers 19. Small project 17 on the multi-hole plates at their joining sections provides always small gaps between two multi-hole plates plates and because of the difference in the positions of installation of the small projections, there is always a small gap 18 at least one position in the direction of the arrangement of the multi-hole plates 14a and 14b. Accordingly the thermal expansions of the multi-hole plates 14a and 14b are completely absorbed by the small gaps 18. The amount of air that flows into the combustion chamber 15 through the small gaps 18 can be suppressed to the extent that it will not influence combustion, and an excellent state of combustion can be maintained.
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