1. Immediacy

use microwave heating It can make the heating object itself become the heating element, heating inside and outside at the same time, so that the heating effect can be achieved in a short time. our country Industrial microwave oven The common microwave operating frequencies of heating equipment are 915 MHz and 2450 MHz. According to the calculation τ It is about the order of 10-11~10-10 s.

2. Selectivity

Not all materials can be heated by microwave. Different materials have different reactions to microwave due to their own dielectric properties. According to different reactions of materials to microwave, we can divide materials into microwave reflective type, microwave transparent type, microwave absorption type and partial microwave absorption type. Therefore, we can use the selectivity of microwave heating to selectively heat each component in the mixture or different parts of the parts.

3. Integrity

under normal conditions

Except for very large objects, microwave heating can generally achieve uniform heating inside and outside. To accelerate the heating speed, the temperature must be increased, but it is easy to cause external scorch and internal unheated phenomenon. Microwave can penetrate the interior of the object, and its heating process is carried out in the whole object at the same time. With rapid temperature rise, uniform temperature and small temperature gradient, it is a "body heat source", which greatly shortens the heat conduction time in conventional heating.

4. Efficiency

In conventional heating, equipment preheating, radiation heat loss and high temperature medium heat loss account for a large proportion of the total energy consumption. When microwave heating is performed, the medium material can absorb microwave and convert it into heat energy. The metal material of equipment shell is microwave reflective material, which can only reflect but not absorb microwave (or rarely absorb microwave). So, composition Microwave heating equipment The heat loss of is only a small part of the total energy consumption. In addition, microwave heating is an internal "body heat source", which does not require high temperature medium to conduct heat. Therefore, most of the microwave energy is absorbed by the medium material and converted into heat required for temperature rise, forming the characteristic of high efficiency of microwave energy utilization.

besides, Microwave heating technology There is also the advantage of pollution-free. The energy used in the heating process is electric energy, which does not pollute the environment. It also has the advantages of high heating quality and less nutritional damage.