What is the principle of rice cooker?
The rice cooker is to use the heating plate to cook at the bottom of the aluminum pan. The heating plate is internally provided with an electric hot wire, and the electric heating wire is controlled by an automatic switch.The central heating plate with a circular hole, the hole has a sense of soft magnetic, it through to the top with the bottom of the spring. This is a pure ferrite. It can be attracted by a permanent magnet at 100 degrees C or less. But when it rises to 103 degrees, it loses magnetism and is no longer attracted by permanent magnets.When you press the switch button, switch to the top of the magnet bar with a sense of soft magnet. At this point, the hotline is switched on and heated.When the rice in the pot is boiling, the water in the pot gradually decreases. When the water begins to evaporate, the temperature in the pot rises from 100. When rose to 103 degrees, the sense of soft magnet is not attracted by magnet, the switch lever for the spring and the gravity and pressure drop, the contact point separately, heating off. At the same time, connect another insulation circuit, keep the temperature of the rice at about 70.
Lever switch: the switch is entirely mechanical and has a normally open contact. When cooking, press the switch, turn on the heating pipe, and supply the heating indicator to the light. When the meal is good, the thermostat releases the lever switch and causes the contact to be disconnected. After that, the heating pipe is controlled only by the thermal switch. 5 、 current limiting resistor: the appearance is golden yellow or white, and the size is like the 3W resistor. It is between the heating tube and the power supply, and plays the role of protecting the heating tube. The common current limiting resistor is 185C, 5A or 10A (depending on the power of the rice cooker). The current limiting resistor is the key element to protect the heating tube. It can be replaced by wire. At the bottom of rice cooker has a circular aluminum plate with a hole in the middle is the electric cooker main heating element is Steamed Rice he cooked in the middle heating plate has a thin aluminum sheet below is a spring inside it is a magnet magnet which is close to the bottom of the pot, the pot on it a physical properties at room temperature inside the magnet is magnetic when its temperature reaches 104 degrees is not magnetic electric cooker in the use of this principle in the circuit he drives a switch to control the time to cook in the rice cooker just work began to switch on the chassis heating electric cooker when electricity cooker chassis when the temperature reached 104 degrees magnetic loss of magnetic spring action makes the switch off this is the electric cooker in the Steamed Rice just perfect
