How do you know the rice cooker is cooked?
The basic principle is bimetallic temperature control.The heating circuit is mainly composed of sensing soft magnet and a permanent magnet. The sense of soft magnet and the heating surface is fixed on the bottom of the inner pot, heat directly through the heated surface passed to it, when the temperature is below 103 DEG C, sensing soft magnet and permanent magnet has magnetism, when the temperature is higher than 103 DEG C, the magnet will suddenly lose a sense of soft magnetic.When cooking by hand press start switch, through the drive rod of the permanent magnet and soft magnetic pull, the suction is higher than the elastic force of the spring and the permanent magnet of the gravity, so the permanent magnet will not fall down, the contact is closed, the circuit is switched on, the heating plate heating. When the rice is cooked, the temperature continues to rise, when it reaches 103 degrees, the sudden loss of soft magnet permanent magnet magnetic, elastic force of the spring and fall of its own gravity, through the drive rod of the contact part, the circuit is disconnected, the heating plate to stop heating. This will play a role in limiting temperature.When the temperature drops, the bimetallic plate is gradually recovered, and when the temperature is lower than the holding temperature, the position of the moving plate is lower than the fulcrum, and the contact is closed under the action of the energy storing spring plate, and the circuit is switched on. In this way, although the thermostat has been disconnected, but the insulation can continue to move the purpose of insulation.
The cooker is equipped with a thermostat: it is also called magnetic steel. It is equipped with a permanent magnetic ring and a spring that can be pressed and positioned in the middle of the heating plate. When cooking, cooking press switch, magnet driven by suction lever switch the power contacts connected, when cooking Steamed Rice, bottom temperature rising, the permanent magnet suction decreases with increasing temperature, when the inner pot of water is evaporated, the temperature reached 103 + 2C, magnetic ring the suction is smaller than the elastic spring, the temperature limiter is spring, drive the lever switch, cut off power supply.
The working principle of electric rice cooker is to convert electric energy into electric energy through electric heating element, and to control temperature and heat by using temperature control element. As shown in the picture of the luxurious type of insulated automatic rice cooker. From the figure, turning on the power supply of electric cooker, the yellow indicator light, press the button, switch contact, the red indicator light, electric heating plate heat will continue to heat to the inner liner, the temperature gradually increased; when the temperature rises to 65 DEG, thermal action, normally closed contact disconnect. Because the magnetic steel temperature limiter is still connected with the power supply, the circuit is still connected, and the electric heating disc continues to generate heat. When the temperature is increased to 103 DEG C, the steel magnet temperature limiter is operated, the power supply is automatically cut off, the red indicator lamp is turned off, and the electric heating plate is stopped to generate heat. The rice cooker is in the heat preservation condition and the yellow indicator light is on. When the temperature is low to 65 degrees, automatic power-off. In this way, the temperature of the food in the rice cooker is kept at about 65 DEG C.Should be pointed out that the yellow indicator light is not equal to the power required to cook, press the switch button, the electric cooker can enter the cooking work, otherwise two indicator lights alternate bright, only the electric cooker liner in the insulating state, low temperature, not the rice to cook mature rice.
