the principle of constant temperature electric soldering iron
Working principle: When the temperature of the welding head is below the constant temperature value, the magnetic temperature sensor connected to the welding head end attracts the permanent magnet, so that the contact on the magnetic steel connecting rod is connected, and the power is sent to the heating element, so that the temperature of the welding head rises gradually . When the temperature is higher than the constant temperature, the heating element loses its magnetism, the power supply is cut off, and the heating is stopped. In this way, the power supply is automatically turned on or off, the temperature is raised and lowered repeatedly, and the electric soldering iron is kept at a constant temperature. If the type of heating element is changed, different constant temperature values can be obtained.
