(1) High heating speed. Microwave h

(1) High heating speed. Microwave heating is internal heating by using the heated object itself as the heating body, which does not depend on heat conduction, so the internal temperature of the object can be raised rapidly and the heating time required is short. Generally, only 1/10~1/100 of the conventional method can complete the whole heating process. (2) Microwave heating with good heating uniformity is internal heating, and often has the performance of automatic balance, so compared with external heating, it is easy to achieve the purpose of uniform heating, avoiding the occurrence of surface hardening and inhomogeneity. Of course, the uniformity of heating also has a certain limit, depending on the penetration depth of the microwave to the object. MHz 915 and 2450 microwaves, the penetration depth is about tens to several centimeters. Only when the geometric size of the heating object is much smaller than the penetration depth, can the microwave penetrate into the interior and reach uniform heating. (3) Heating is easy to control the thermal inertia of microwave heating, can be heated and heated immediately, easy to control, is conducive to the preparation of automatic assembly line. (4) The selective absorption of some components is very easy to absorb microwave, while others are not easy to absorb microwave. The selectivity of wave heating is beneficial to the improvement of product quality. (5) Microwave heating equipment with high heating efficiency consumes a part of the heat in the power supply and the electronic tube itself, but because the heating action begins with the processing material itself and basically does not radiate heat dissipation, the thermal efficiency is high and the thermal efficiency can reach 80%. At the same time, it avoids the high temperature of the environment, improves the working conditions and reduces the area of the equipment. Because microwave heating has the above characteristics, the application of microwave heating in agriculture, forestry, textile industry, chemical industry, pharmaceutical industry and food industry has been developed rapidly. In the food industry, microwave heating has been widely used in cooking, dehydration and drying, thawing. Disinfection and sterilization, baking and many other fields.