Queen7000 chain oven has a heating area of 720mm long and a transmission belt width of 550mm (it can bake 20-inch pizza). The combination series is used to send the heat into the oven stably. Time and conveyor belt speed of all the ovens are controlled by microcomputer, which makes the temperature control more stable and the productivity more efficient. The host machine is whole welding structure and 304 food grade stainless steel material, which can save energy 27% and increase efficiency 15% compared with similar products.