The pressure cooker can't be vented immediately after it is turned off.

after turning off the fire, you should wait for 1 minutes, and then use chopsticks to pick up the rotating iron tap. If there is no gas, it means that the cover can be opened. If there is gas, you should wait for 5 minutes. If it is urgent to open the cover, you should directly use chopsticks to pick up the iron tap for manual deflation. Never open the cover when the gas is not released.

1. The principle of pressure cooker pressing food is basically to keep the food at high temperature in a closed space, so the cooking time is greatly shortened.

2. After the pressure cooker shuts off the fire, it can't be opened if you are eager to open the lid, because the pot is in a high temperature state and the air pressure is not released. Only after the high pressure valve is depressurized and deflated can the cover be uncovered.

3. After the food in the pressure cooker is turned off, the air pressure in the cooker will also decrease as the temperature drops, so it is easy to lift the cover at this time.

Precautions for the use of pressure cooker:

1. Food stored in a closed space for one night will produce odor or odor.

2. When the weather is hot, the meat is placed in a closed space, which is easy to rot.

3. When pressing meat, it is inevitable to add onion, ginger and various seasonings. These seasonings will produce odor if they are left in a closed space for a long time. Especially onion and ginger.

Therefore, after stewing the meat in the pressure cooker, it is still necessary to wait for it to cool naturally before lifting the lid. It's much better to let out the flavor inside, even if you just open the lid and put the meat in the pressure cooker.