There are two ways to increase the heating rate of an electric heater:
1. Use diode half-wave rectification to change the effective value of AC to achieve the purpose of changing heating power and heating speed. This method is most applied, and the advantage is that the circuit structure is simple and convenient to operate.
2. Transforming, using a small transformer to transform, the advantage is that it can be adjusted in multiple gears. The disadvantage is that the circuit structure is more complicated and the production cost is high.
3. The law of conservation of energy increases power to increase heat.