Aerostat bag body inflating and deflating integrated machine

The invention belongs to the field of aerostats and discloses an aerostat bag body inflating and deflating integrated machine. A draught fan and an air valve are installed in a protecting cover, and the protecting cover has the sealing performance. When the bag body pressure is lower than a set threshold value, the draught fan is automatically opened, the air valve is automatically opened at the same time, the inflating and deflating integrated machine supplements air into a bag body till the bag body pressure restores to the set threshold value, and the draught fan and the air valve are automatically closed; when the bag body pressure is higher than the set threshold value, the air valve is automatically opened, the bag body performs air exhausting till the bag body pressure restores to the set threshold value, and the air valve is automatically closed; and the problems of draught fan gas leaking and low efficiency are solved, the installing hole number and the installing area of thebag body are reduced, the