What methods are used to achieve the heating speed of an electric heater?

What methods are used to achieve the heating speed of an electric heater?

This depends on the structure of the heater. The frequency converter can only change the frequency of AC power, thereby changing the rotational speed of the motor and achieving the goal of changing the output power of the motor. And since the heater does not rotate, frequency conversion cannot control the heating speed.

There are two simple methods:

1. Use diode half wave rectification to change the effective value of AC power, achieving the goal of changing heating power and heating speed; This method has the most applications, and its advantage is that the circuit structure is simple and easy to operate.

2. Voltage transformation, using a small transformer for voltage transformation, has the advantage of being adjustable in multiple levels, but the disadvantage is that the circuit structure is complex and the production cost is high.

1, Choose high-quality electric heating tubes

1. Choose high-quality materials. The electric heating tube is made of SS321 stainless steel seamless steel pipe with a thickness of 1.5mm. The electric heating wire should be made of high-quality high-temperature nickel chromium alloy resistance wire (Ni80Cr20). Compared with ordinary heating wires, high-temperature nickel alloy resistance wires have properties such as high temperature resistance, oxidation resistance, high electrical resistivity, higher yield strength, stronger sulfur resistance, and higher elongation, thus resulting in a longer working life.

2. Selection of filling materials. Selecting high-purity crystalline magnesium oxide powder as the filling material, its particle size and ratio should be reasonable to ensure high flow rate and density during the production of heating tubes, improve thermal conductivity efficiency, and ensure insulation density of 2.45g/cm3.

3. Adopting advanced manufacturing processes. Adopting a fully automatic wire winding machine and advanced welding technology, the electric heating tube is subjected to fully automatic powder filling, fully automatic pipe shrinking, and high-temperature annealing treatment processes to eliminate stress and eliminate moisture. The welding of electric heating elements and sleeves must be strictly carried out in accordance with the process requirements, and water pressure testing, dielectric strength, and insulation resistance inspection must be carried out according to the test pressure.

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