It is normal for the pressure cooker to eject some gas during operation, because this is the pressure release mechanism inside the pressure cooker. But if the pressure cooker keeps blowing, there may be some problems. First of all, the reason why the pressure cooker blows air may be that the pressure is too high, and it automatically releases the pressure. When the pressure drops, the air will not be blown. Secondly, if the pressure cooker keeps blowing, it may be because the pressure cooker is not tightly sealed and there is air leakage. In addition, the pressure cooker itself will keep ringing when it is used. This is because the exhaust valve on the pot cover is pushed upward by the steam in the pot, the hole ratio of the exhaust valve is small, and the pressure of the pressure cooker is relatively urgent when it is used, so it will make a sound, which is a normal phenomenon. If the pressure cooker keeps blowing, there may be a safety hazard. For example, the exhaust hole of the pressure cooker is blocked, and the pressure may not be released normally, resulting in an explosion. Therefore, before using the pressure cooker, it is necessary to ensure that the vent hole is unobstructed, and the hole under the safety valve is not blocked by residual rice grains and food residues.