Multifunctional microwave heating vacuum oven

The utility model discloses a multifunctional microwave heating vacuum oven which is composed of a metal shell, a middle insulating layer and a liner, wherein a vacuum cavity is formed in the liner, a heating pipe is arranged in the vacuum cavity, an insulation cover is arranged on the upper part of the heating pipe, a thermocouple and a ventilation pipe are respectively inserted into the heating pipe, the thermocouple is connected with a PLC (Programmable Logic Controller), the ventilation pipe is respectively connected with a tail gas processing device and a vacuum extractor through a three-way pipe, and the vacuum extractor is connected with the PLC; the heating pipe is arranged on a precise electronic balance which is connected with the PLC; a small hole which is connected with a protective gas blowing device is formed in the liner; a microwave generating device is installed on the middle insulating layer and connected with the PLC which is connected with a computer. The multifunctional microwave heating vacuum oven is used for realizing automatic control in material synthesizing and cracking processes and the like in a microwave field in a vacuum condition, on-line monitoring of parameters of temperature, vacuum degree, quality, heating time and the like and tail gas recycling, and the multifunctional microwave heating vacuum oven is a microwave oven which has the advantages of environmental friendliness and high efficiency and can be used for scientific research and production.