The concept of nozzle temperature percentage refers to the percentage of full voltage AC220V V V. According to the thermal power calculation formula: thermal power (W)= voltage (V)* current (A)= square of voltage/resistance of heating coil (ohm), and the resistance of heating coil is certain, so thermal power = square of percentage * maximum power. For example, the power of the electric heating coil is 300 W/AC 220 V. When the percentage is 80%, the voltage value is 176V, and the power becomes 0.64 * 300 W =192 W. When the heating and heat dissipation reach a balance, it will be stable in a temperature range. This is called constant temperature control. The biggest advantage is that the nozzle is always electrified and heated.