1, you just need to take off the rotating things on the cover (marked by the red circle below), but when you take them away, you should be careful to be burned by hot air and keep your head away. The principle of this method is to release all the hot air in the pot, thus reducing the air pressure in the pot. As long as you wait for a while and see that the exit is not steaming or steaming very little, you can basically open it.

2. Put the cold water into the pot and the pressure cooker into the pot. The principle of this method is to use cold water to quickly cool the temperature in the pot. If the temperature in the pot decreases, the air pressure in the pot will also decrease. As long as the pot cools down, the lid can be lifted.

Note: Don't forcibly open it if it can't be opened, because the air pressure in the pot is very high and dangerous.

Extended data

Instructions for use of pressure cooker:

(1) Before each use, carefully check whether the exhaust hole of the pressure limiting valve is unobstructed (it can be cleaned with a toothpick) and keep the anti-blocking cover clean.

(2) The food in the pot should not be too full, generally not exceeding four fifths of the pot height. For foods that are prone to flatulence (such as kelp, mung beans, corn, etc. ), do not exceed half of the pot body.

(3) When closing the lid, mark the lid and the pot body and fasten them completely. Stop where you are and don't overdo it.

(4) After the cover is closed and heated, when more steam is discharged from the pressure limiting vent, the pressure valve cover is fastened.

(5) When the pressure limiting valve is working, turn down the firepower and keep the pressure limiting valve inching.

(6) Before opening the cover, the cover can only be opened after the pressure is completely reduced, that is, the valve core of the protection device is lowered and reset. Don't pull the handle hard.

(7) General pressure cookers stipulate that the safe service life shall not exceed eight years.

How to prevent the pressure cooker from exploding;

(1) Before use, carefully check whether the air holes on the lid seat are clear and the safety plug is in good condition.

(2) The food in the pot should not exceed 4/5 of the capacity. When closing the lid, it must be screwed into the slot, and the upper and lower handles should be aligned. When cooking, the upper pressure valve is closed when steam starts to be discharged from the air hole.

(3) When the temperature rises to the point where the pressure limiting valve hisses loudly, the temperature shall be lowered immediately.

(4) When cooking, if the safety plug is found to exhaust, it should be replaced with a new fusible piece in time, and it should not be blocked with iron wire or cloth.

References:

Pressure cooker-Baidu encyclopedia