| 摘要 |
<p>PURPOSE:To improve heat efficiency of the portable cooking stove having a kettle holder comprising a receiving piece and a base frame by a method wherein the base frame is formed in a rectangle on the outside and in a circle on the inside, with the entire peripheral surface of the inside of the base frame spaced from a burner part with a certain gap so as to supress an oversupply of air. CONSTITUTION:The outer periphery 20 of the base frame 19 of the kettle holder 4 is formed in a rectangle, with the inner periphery in a circle. The entire periphery of the inner circle 21 is kept at a position apart from the burner 3 by a certain distance, and the lower end 22 thereof is extended into contact with a receiving tray 16. With this construction, secondary air for a main flame 12 and inner flame 14 is supplied from a secondary air hole 15 in the center of the burner 7 and another secondary air hole 18 between the receiving tray 16 and burner 7. The air never supplied from the gap 24 between a kettle 5 and the base frame 19, and the gap 24 serves as a combustion gas passage. Accordingly, the excessive air flowing in can be prevented, which prevents the dropping down of the combustion gas temperature, therefore the heat efficiency can be improved.</p> |
