To prevent the fuel evaporated from a fuel vaporizing means from becoming much at the center of a combustion chamber and becoming a rich mixture, in a combustion heater used for heating or the like.
A combustion accelerating plate 26 is provided at a small interval before or behind a throttle opening 7a in the bulk head 7 between the first combustion chamber 11 and the second combustion chamber 14. The air for combustion is let flow in the direction of tangent into the first combustion chamber 11, whereupon the flow becomes weak at the center. Moreover, it becomes negative pressure by swirling flow at the center, so fuel evaporated from a fuel vaporizing means such as a wick q becomes much at the center. Accordingly, a rich mixture superabundant with fuel is formed at the center, and it combusts incompletely, without mixing with air enough, so exhaust emission property deteriorates. The combustion accelerating plate 26 deflects the rich mixture and lets it ride on a swirling flow, and besides it accelerates the combustion of the mixture because it is incandescent itself. In addition, a porous plate or the like having air-permeability may be used.
ONIMARU SADAHISA
YASUDA MASANORI
MATSUOKA AKIO
KAMEOKA TERUHIKO
NARAHARA TAKATOMO
DENSO CORP
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