Air draft device and fermentation tank

The utility model relates to an air draft device and a fermentation tank, comprising: a buffer tank, which is provided with an inlet and an outlet; an exhaust fan, wherein the exhaust fan is communicated with the outlet; and the vibration motor is arranged on the buffer box. In this way, by arranging the buffer box, mixed gas can be buffered in the buffer box before being exhausted by the exhaust fan, materials such as excrement in the mixed gas are promoted to be attached to the buffer box, and the situation that the materials enter a pipeline and the exhaust fan to cause blockage is avoided. In addition, a vibration motor is arranged on the buffer box, and when the air draft device works for a certain time and a certain amount of materials are attached to the buffer box, the materials attached to the buffer box can be driven to fall off through vibration of the vibration motor. Therefore, the buffer tank can be prevented from being blocked. 一种抽风装置及发酵罐，包括：缓冲箱，所述缓冲箱上设置有入口与出口；抽风机，所述抽风机与所述出口连通；震动电机，所述震动电机设置在所述缓