Microwave heating and drying device

Abstract

The invention provides a microwave heating and drying device which comprises a waveguide assembly, an impedance matching microwave radiating antenna arranged below the waveguide assembly, a shielding outer cover covering the impedance matching microwave radiating antenna and a microwave absorbing device arranged in the shielding outer cover. Microwaves emitted by a microwave source can be converted into circularly polarized microwaves from linearly polarized microwaves in the waveguide assembly, so that evenly distributed field strength is further generated in the shielding outer cover, rapid and even heating and drying process is carried out on articles, to be heated, on the microwave absorption device. By the adoption of the microwave heating and drying device, heating and drying can be effectively carried out on the articles to be heated, frozen fresh meat can be evenly heated, an expensive microwave circulator or one-way isolator does not need to be equipped, a multi-column impedance regulator also does not need to be equipped, and the purpose of lowering construction cost can be achieved effectively.

Description

technical field [0001] The invention relates to a microwave heating and drying device which uses microwaves to heat and dry an object to be heated. Background technique [0002] In the traditional heating method, no matter it is heat radiation or air conduction, the heat is slowly conducted from the heating source to the inside of the object to be heated indirectly through the surface of the object to be heated. For poor medium or metal powder, it can only be heated at a slow speed, and during the heating period, a relatively high proportion of the heat generated by the heating source is dissipated in the heating furnace used to hold the object to be heated and Dissipated in the air around the object to be heated, the energy utilization rate is extremely low. [0003] In order to solve the above-mentioned problem of low energy utilization when heating by radiation or conduction, the prior art uses high-power microwaves to heat the object to be heated. The object to be heate...

AI Technical Summary

Problems solved by technology

However, this slow heating method takes three to four days. If the general microwave device is used to heat the high-grade meat with the above-mentioned uneven heating method of high-power microwaves, and the high-grade meat is heated rapidly, it is easy to cause some areas It is still in a frozen state, but blood seeps out of some areas due to overheating, which greatly affects the taste of food

[0006] In addition, in general high-power microwave irradiation systems, in order to avoid damage to the microwave source caused by reflected microwaves caused by impedance mismatch between the transmission line and the active cavity, expensive microwaves are usually installed between the microwave source and the active cavity. Circulator (microwavecirculator) or one-way isolator (isolator), and the installation of multi-column impedance adjuster (multi-stubtuner), so that the high-power microwave system has the disadvantage of high hardware equipment cost

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