It is impossible to explode, but it is better not to use it like that, because when the pressure cooker is used at ordinary times, there is a downward pressure after the cover is covered, which can ensure that the bottom of the cooker is closely attached to the heating plate and the heat transfer efficiency is high. Without the cover, the bottom of the pot and the heating plate are not tight, and slow heat transfer is a trivial matter. The heat of the heating plate can not be radiated in time and effectively, and the damage to the heating plate will not be worth the loss.