The pressure cooker, also known as pressure cooker, pressure cooker, is a kitchen pot. Its working principle is through the physical phenomenon that the boiling point of a liquid will be raised under higher air pressure, applying pressure to the water so that the water can reach a higher temperature without boiling, in order to speed up the efficiency of stewing food.

The pressure cooker was first invented by a French doctor named Denis Papin, initially only as a sterilization tool. Only later was it slowly used as a cooking tool. Pressure cooker consists of a pot body, lid, fusible sheet, bleeder hole, safety valve and sealing rubber ring, and other new forms of bleeder channel. There are two main types of pressure cookers: ordinary energy pressure cookers and electric pressure cookers. The advantage lies in the time saving and energy saving, the disadvantage lies in the incorrect operation or defective, it may explode and cause injury.