What is the temperature sensor used in the electric kettle? What is the working principle?
The working process of the heating control circuitElectric kettle began to boil water, the temperature controller ST at low temperature. At this time, the temperature controller ST two lead wire is communicated between the terminals, and provides the channel for the power supply. At this time, the green indicator light is on, and the red indicator lamp is neither voltage nor bright at both ends. When the temperature in the water bottle is over 96 degrees centigrade (water is switched on), the temperature controller ST automatically disconnects and stops supplying power to the boiling water heater. At this point, the two ends of the insulated heater still have alternating 220V voltage, but the heat resistance of the heater is larger, and the energy produced is only 1/20 of the boiling water heater. Therefore, it can only play the role of thermal insulation. At this point, the AC 220V is powered by the red indicator light via EM. The green indicator lights out and the red indicator light is on.If electric thermos decreases in water temperature, temperature controller ST and will automatically switch on the water heater, in addition to always make water bottle in boiling water maintained at 90 degrees and above.
The working process of the electric kettle heating circuitAC 220V power supply for electric kettle power supply, AC power supply L (FireWire) end of the thermal fuse FU is added to the boiling water heater and heater insulation EM at the end of the EH2, AC power supply N (zero line) end of the thermostat ST to cook the other end of the water heater, and AC power supply N (zero line the other end of the diode end) VIE C and SA to switch insulation heater EH2. Make the boiling water heater and the insulated heater both have alternating voltage, and start heating, as shown.
The electric kettle with temperature sensor is a sensitive device with double sheet metal fabrication, low temperature bending it in one direction, the temperature reaches the specified value to another direction bending circuit disconnect, stop heating. Electric pot is the clever use of this kind of sensor.
