1. The working frequency range is different: the general working frequency of the medium frequency induction heating equipment is 1K-10K ; the working frequency of the high frequency induction heating equipment is 100K-500K .

2. Different oscillation frequency: The oscillation frequency of the medium frequency induction heating device is generally 0.5-20KHZ . The oscillation frequency of the high frequency induction heating device is generally 20-80KHZ . 

3. The quenching layer is different during quenching: the quenching layer of the medium frequency induction heating equipment is deep, 3-5mm ; the quenching layer of the high frequency induction heating equipment is shallow, 1.5-2mm .

4. Different applications: Medium frequency induction heating equipment is suitable for parts subject to distortion and pressure load, such as crankshaft, large gear, grinding machine spindle, etc.; high frequency induction heating equipment is suitable for parts working under friction conditions.

5. The effect is different: the effect that different frequencies can achieve is different. The higher the frequency, the stronger the skin effect, the shallower the depth of the induced current flowing into the workpiece; therefore, the workpiece frequency of the medium frequency induction heating device is relatively low, the current The depth of transmission is also deep, which can be used to complete the warm forging or smelting process; the high frequency induction heating device can be used to finish the surface quenching or welding.