Working principle of charcoal barbecue oven
The working principle of charcoal barbecue oven is to use the heat generated by charcoal combustion to heat and bake food. The charcoal used is mostly smokeless charcoal, but the use is often accompanied by oil fume because the grease and seasoning on the baking string fall on the charcoal and burn smoke during the baking process.

Working Principle of gas barbecue oven
The principle of gas barbecue oven is to use combustible gas to heat and bake food. Liquefied gas or natural gas can be used, which are called liquefied gas barbecue oven and natural gas barbecue oven respectively.

Working Principle of electric oven
The principle of electric barbecue oven is to convert electric energy into heat energy to heat and bake food. Common types include electric heating tube, quartz tube, volcanic rock and other media