microwave heating device

Abstract

The invention relates to a microwave heating device utilizing industrial microwave heating and drying. Its purpose is to provide a new type of microwave heating device, which avoids the mutual coupling phenomenon of multiple magnetrons by using a new type of microwave power transmission and energy feeding method, thereby not only improving the output power and efficiency of the magnetron, but also improving It improves the working life and reliability of the magnetron, not only increases the output, but also reduces the maintenance cost of the device and greatly saves energy. A microwave heating device, comprising: a rotatable metal outer cylinder and a metal inner cylinder provided with a microwave power radiation source, a coaxial annular cavity is formed in the metal outer cylinder, and a support tube is arranged in the annular cavity, At least one group of microslot antenna groups is installed on the support tube, and the microslot antenna group is composed of a plurality of microslot antennas uniformly arranged in the angular direction around the support tube. The antenna is connected, and the microwave magnetron is inserted into the waveguide exciter.

Description

Technical field [0001] The present invention relates to the technical field of microwave energy application, in particular to a microwave heating device that uses industrial microwave heating and drying, and is particularly suitable for drying and producing high-yield materials, such as rice, wheat, corn and other food crops. And the dehydration, drying, insecticide and processing of economic crops such as tea and tobacco. Background technique [0002] In the application of industrial microwave heating technology, a box-type multi-cavity microwave heating method is usually used. For example, a non-continuous production method similar to household microwave ovens requires intermittent heating and treatment from furnace to furnace. The other is tunnel-type continuous production. The working method, the material enters the tunnel heating furnace or heating kiln evenly on the conveyor belt. Under the action of the microwave power, the material absorbs the microwave power while walkin...

AI Technical Summary

Problems solved by technology

For the latter tunnel furnace with continuous operation, due to the improper design of its microwave energy feeding method, when multiple magnetrons are used to feed energy into the furnace separately, due to the unavoidable gap between each magnetron Mutual coupling phenomenon, this structure not only makes the efficiency of a single magnetron low, affects the power output, but also causes the life of the magnetron to be shortened or even damaged

Secondly, the structure of this design will make the distribution of the microwave electric field acting on the material very uneven. At the same time, because the material to be dried is statically accumulated on the conveyor belt, it will affect the overall heating and drying effect, and the output will be limited. to high yield

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