Pressure cooker, also known as pressure cooker or pressure cooker, is a common kitchen pot. The pressure cooker accelerates the physical phenomenon that the boiling point of the liquid at higher air pressure accelerates the lifting, exerting pressure on the water so that the water can reach a higher temperature without boiling, in order to speed up the efficiency of stewed food. With it, it can be used to heat the cooked food to more than 100 ° C, and at high altitudes, the pressure cooker can avoid the problem of lowering the boiling point of the water and not easily cooking food.
The biggest advantage of the pressure cooker is that it saves time and energy, and its biggest disadvantage is that when it is not operated correctly or has defects, it may explode and cause injury.
This is not, just recently, a community in the morning an explosion woke up the owner who was still asleep next door, after knowing the truth, everyone was stunned, it was precisely because a big mother used a pressure cooker to cook red bean porridge, the result was because the air pressure was too large, the pressure cooker exploded in the kitchen, the hood, gas stove, cupboard, kitchen ceiling have different degrees of destruction, the scene is really unbearable. But fortunately, this aunt was not in the kitchen at that time, otherwise the consequences would be unimaginable!
Just after this matter was exposed to the Internet, many netizens also expressed their embarrassing encounters: some netizens said that he was cooking mung bean porridge; some netizens said that he used a pressure cooker to stew turtles, and after the pressure cooker exploded, the turtles flew to the ceiling, making people cry and laugh! Some netizens said that they had personally experienced the scene of the pressure cooker explosion, and they were afraid of the well rope after being bitten by a snake for ten years, and from then on they were afraid when they saw the pressure cooker!
<h1 class="pgc-h-arrow-right" data-track="230" > the principle of the pressure cooker is simple</h1>
In the earliest days, the name of the pressure cooker was "Pa Ping", which was invented by a French doctor named Dennis Papin. Papin was both a doctor, a physicist, and a mechanical engineer. Solid theoretical knowledge of physics and mechanics was a reliable basis for his invention of the pressure cooker. Because the boiling point of water is affected by air pressure, the higher the air pressure, the higher the boiling point.
As we all know, when the air pressure is greater than 1 atmosphere, the water will only boil when the temperature is higher than 100 ° C. However, at higher altitudes, the air pressure is less than 1 standard atmospheric pressure, and the boiling point of water is less than 100 ° C, so water can boil less than 100 ° C, but eggs and other foods are simply not cooked with ordinary pots and pans. Our commonly used pressure cooker is designed using this principle.
When using the pressure cooker, the water in the pot is in a sealed state, the water vapor generated by the heat evaporation of the water can not be directly diffused into the air, the pot is in the high pressure state, so that the pressure inside the pressure cooker is higher than 1 atmosphere pressure, the water in the pot can only boil until 100 degrees Celsius, and the rice is easy to cook quickly. Of course, the pot will not be under constant high pressure, otherwise it will explode!
It is precisely because the pressure cooker cooks food, easy to cook, easy to rot, but also relatively time-saving, especially stewed meat food, not only nutrition and taste will not be lost, and the taste will be very good, so the pressure cooker has become a must-have kitchenware for home stewing! However, because of the particularity of the pressure cooker, there are many accidents caused by incorrect use.
<h1 class="pgc-h-arrow-right" data-track="216" > the clever design of the pressure cooker</h1>
Pressure cookers consist of a pot body, lid, fusible sheet, vent holes, safety valves and sealing rings, and other new forms of venting channels. When in use, the vent and safety valve play an important role, once the air pressure in the pot reaches the upper limit, the vent will continue to deflate, so that the air pressure in the pot is kept within the safe range, so that there will be no adverse consequences caused by continuous increase, to prevent explosion!
The explosion of the pressure cooker that we have seen is more or less caused by improper operation, either the vent is blocked, or the air pressure inside is not reduced and the pot is opened. Especially when stewing foods that are easy to overflow or swell, such consequences are most likely to occur. The aforementioned big mother boiled red beans, and netizens proposed that when the household cooked mung beans, there was an explosion, which would be because these were easy to overflow, and small particles such as mung beans and red beans were easy to block the air holes, which caused the pressure cooker to explode!
With the development of science and technology, the traditional pressure cooker is also used relatively less, now everyone uses the electric pressure cooker, once the air pressure is super high, it will automatically cut off the power, but also set the pressure limit, temperature limit, anti-blockage, over-temperature, pressure relief, opening and closing and other safety devices, so as to ensure the safe use of the pressure cooker.
The major safety accidents that occur during the use of traditional pressure cookers are mostly not product problems. In order to ensure the quality of the pressure cooker, the state implemented a licensing system for pressure cooker products, and in 1992 and 1994 respectively formulated new mandatory standards for aluminum pressure cooker and stainless steel pressure cooker. Therefore, in the process of using the pressure cooker, it is necessary to follow the correct steps, otherwise the consequences are unimaginable!
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