After the 1920s, there were not as many new applications and developments as in the previous period, but during this period, all kinds of electric heating appliances were redesigned and continuously improved, becoming a stage of improvement in the history of electric heating appliances. In terms of household electric heating appliances, various appliances are designed to be more beautiful, durable, and sturdy, and most of them have automatic temperature and time control.

Electric heater is an internationally popular electric heating device. Used for heating, insulation, and heating of flowing liquid and gaseous media. When the heating medium passes through the heating chamber of the electric heater under pressure, the huge heat generated during the operation of the electric heating element is uniformly carried away using the principle of fluid thermodynamics, so that the temperature of the heated medium meets the user's process requirements.