It is well known that the biggest difference between industrial microwave furnaces (except traveling wave heaters) and domestic microwave ovens lies in the difference in the microwave power and the volume of the furnace chambers. Generally, the volume of a domestic microwave oven is generally between 15 and 30 liters, or between 25 and 40 liters in USA and Europe, while the volume of an industrial microwave oven is above 500 liters, and sometimes even tens of thousands of liters. Therefore, there are many different considerations when designing such large-volume industrial microwave ovens, but they can be summarized as follows:
1. Have a sufficiently high microwave power density;
2. There are enough modes to ensure the uniformity of microwave field intensity distribution in the furnace;
3. It has a good coupling mode with the microwave source to ensure a sufficiently high coupling efficiency;
4. Avoid high frequency breakdown caused by high water vapor in the furnace, especially near the coupling port;
5, with a good anti-leakage device to ensure the safety of personnel in the operating position.
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