Pressure cooker structure:
It consists of a pot body, a pot cover, a fusible piece, an exhaust hole, a safety valve, a sealing rubber ring and other new exhaust channels.
The fusible piece is installed to prevent the safety valve from breaking down, and is made of aluminum alloy with low melting point. Once the safety valve fails, the pressure in the pot will be too high and the temperature will rise. When the temperature reaches the melting point of the fusible piece, the fusible piece will continue to be heated and melted, and the gas in the pot will be ejected from the fusible piece, so that the pressure in the pot will be reduced, thus preventing the occurrence of explosion accidents.
Extended data:
First, the function of pressure cooker safety valve
Function of pressure-limiting valve (pressure-limiting device): In the cooking process, when the pressure in the pot reaches the working pressure, the pressure-limiting valve exhausts through the exhaust hole, so as to keep the pressure in the pot within a certain range and achieve the purpose of cooking. Function of safety valve: During cooking, the pressure in the pot is too high because the exhaust pipe of the pressure limiting valve is blocked. At this time, the pressure is discharged through the safety valve to ensure the safety of the pressure cooker.
Second, the spring safety valve
The opening and closing action of the spring safety valve depends on the change of medium pressure at the inlet end and the pre-tightening force of the spring to make the valve core open and close automatically. When the medium pressure (internal pressure) rises to a level where the lifting force is greater than the spring preload, the spool automatically opens against the spring preload, releasing excess medium, so the internal pressure drops. In addition, due to the spring force, when the internal pressure drops to a safe value, the valve core automatically closes and the release stops.
Baidu encyclopedia-pressure cooker safety valve
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