平底锅烧煮食物面积大,翻炒起来比较方便,因而成为炊具中的新宠。有些使用者想用它来炸烤食物,怎么办呢?怎样提高灶火的热效率呢?于是,有“肚脐”的平底锅便产生了。从示意图的左上角我们看到,火焰产生的热量不但烧热锅底,还通过“肚脐”将热量直接 Pan cooking food area is large, more convenient to stir fry, and thus become the new favorite in cooking utensils. Some users want to use it to bake food, how to do it? How to increase the thermal efficiency of stove fire? Then, there is a “navel” of the pan produced. From the upper left corner of the diagram, we can see that the heat generated by the flame not only heats the bottom of the pan, but also directs the heat through the “navel”.