What is the principle of pressure cooker and how to use it safely?

Pressure cooker is a common kitchen appliance in our life, which can realize the long-term function of ordinary cookers in a short time. Such as cooking porridge, stewing ribs and so on. It is very convenient to use the pressure cooker. Then do you know why the pressure cooker can achieve these functions? What is the principle? This article is a brief introduction for everyone!

One. principle

Pressure cooker, also called pressure cooker, can heat cooked food to above 100℃, which was invented by French physicist Pascal in 1679. It mainly uses the difference of air pressure to adjust the boiling point of water. The steam formed by water heating in the pressure cooker forms high temperature and high pressure in a sealed environment, so that the air pressure is greater than one atmosphere and the water boils when it is higher than one hundred degrees. So you can cook food quickly!

Second, the method of use

When we use the pressure cooker, we must pay special attention to it. Before opening and closing the cover, we need to check whether the valve and exhaust pipe are unobstructed and whether the float moves normally. When closing the lid, the lid and the pot body of the pressure cooker should be completely attached, and the float should play a role. When placing food, water and food should not exceed four-fifths of the capacity of the pot itself; When the pressure cooker is opened after use, the gas in the pressure cooker should be completely released when the cover is opened, otherwise danger may occur.

Third, advantages and disadvantages.

The pressure cooker has a unique function of high temperature and high pressure, which greatly shortens the cooking time and saves energy. However, the pressure cooker with high working pressure is also more destructive to nutrition. Heat-resistant, beautiful, not easy to react with acid, alkali and salt in food, and the service life is particularly long; However, it is expensive, can not be cooled quickly with cold water, is not suitable for hardship, and is easy to change color on gas stoves and electric stoves.

The above is the relevant content about the principle of pressure cooker, I hope it will help everyone!