If the pressure cooker is locked, you can find a hard object and press the check valve to push the check valve back to its position to open the lid. There is still air pressure in the pot. If the lid does not stop when you turn it clockwise, It may be that there is still air pressure in the pot and it must be cooled to relieve the pressure.

Generally, natural cooling, wind cooling and lifting the pressure are used. If you are not in a hurry to open the pot, it is best to use the natural cooling method to relieve the pressure. Unless it is a last resort, there is generally no need to lift the pressure to relieve the pressure. There are too many foreign objects attached to the lid. The residue in the lid should be cleaned promptly and frequently to ensure that the lid is clean. Before opening the lid, make sure there is no air pressure in the pot. , and then remove the pressure limiting valve to ensure that there is no air pressure in the pot before opening the lid, or you can force cooling with cold water to reduce the pressure in the pot.

The lid can only be opened when no gas is released from the pot. Pressure cookers on the market all have safety protection by opening and closing lids. If there is air pressure in the pot, the safety lever is in the rising stage. At this time, the lid cannot be opened according to normal use. When there is no air pressure in the pot, the safety lever descends. The lid can be opened safely. When exhausting, keep your hands or face away from the exhaust port to avoid burns.

The principle of the pressure cooker

The principle of the pressure cooker is very simple, because the boiling point of water is affected by the air pressure. The higher the air pressure, the higher the boiling point. In high mountains and plateaus, the air pressure is less than 1 atmosphere, water can boil at less than 100°C, and eggs cannot be cooked in ordinary pots. When the air pressure is greater than 1 atmosphere, water will boil only when it is higher than 100°C. The commonly used pressure cookers are designed using this principle.

Pressure cooker, also called pressure cooker. The advantage of using a pressure cooker is that not only the cooking time is short, but the cooked food tastes good, especially meat that is not easy to cook becomes easier to cook and tastes good. In order to ensure the safety of the pressure cooker, avoid fusible pieces due to the material. Failure caused by changes, even under normal use, the fusible disc in the fusible disc safety valve must be replaced every six months.