Control device for electric heater of nitrogen making machine

The utility model relates to the technical field of nitrogen making process control, in particular to a control device for an electric heater of a nitrogen making machine, which comprises a main control unit, a heating control loop and a three-phase silicon controlled voltage regulator, the main control unit is respectively connected with a temperature acquisition unit, the three-phase silicon controlled voltage regulator and a pipeline valve, and the heating control loop comprises a relay and a first contactor. The first contactor coil is connected with the main control unit, the first contactor normally open contact is connected with the relay coil, and the first normally open contact of the relay is connected with the three-phase silicon controlled voltage regulator. According to the utility model, the main control unit, the temperature acquisition unit and the heating control loop are used to realize automatic control of the nitrogen-making electric heater, and the three-phase silicon controlled voltage r