The pressure cooker seals the water quite closely. The water vapor generated by water evaporation cannot diffuse to the air, but can only be retained in the pressure cooker, which makes the pressure inside the pressure cooker higher than 1 atmosphere, and also makes the water boil when it is higher than 100 ℃. In this way, a high-temperature and high-pressure environment is formed inside the pressure cooker, and the rice is easy to cook quickly, and it is quite crisp. Of course, the pressure in the autoclave will not be unlimited, or it will explode.

The sealing ring of a new pot that has not been used has high elasticity. Please add a small amount of food oil to the top and bottom of the pot as shown by the arrow in the figure to facilitate the initial opening and closing. The lid, body and handle of the pot shall be cleaned before each use to facilitate the closing of the lid. When putting food, food and water shall not exceed four fifths of the pot capacity, and water or soup shall not be less than 400ml.