Method for improving microwave heating uniformity and dual-port microwave heating device thereof
A microwave heating device and microwave heating technology, which are applied in microwave heating and other directions, can solve the problems of heating uniformity and low microwave absorption efficiency, and achieve the effects of improving microwave utilization, reducing equipment damage rate, and improving uniformity
Inactive Publication Date: 2019-05-10
SICHUAN UNIV
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Problems solved by technology
[0005] The invention proposes a method for improving the uniformity of microwave heating and its dual-port microwave heating device, which solves the problems of low heating uniformity and microwave absorption efficiency in the prior art
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[0029] The single-mode cavity 4 of the present invention is a BJ9 standard waveguide 1, the length of the waveguide 1 is greater than one wavelength, which is 500mm in this embodiment, and the width of the waveguide 1 on both sides is 247.6mm. The size of the narrow side is scanned parametrically, and the smaller value of S11 and S21 is taken, which is 120mm;
[0030] There is a slot antenna 2 on the waveguide 1 on both sides, and the energy is coupled into the microwave heating cavity from the slot antenna 2; the length of the slot antenna 2 is 160 mm, the height of the slot antenna 2 is the center of the cavity, and the width of the slot antenna 2 is S11 and S21 Both are small values, where S11 is the reflection coefficient and S21 is the transmission coefficient.
[0031] By feeding power at both ends of the BJ9 waveguide 1 at the same time, TE10 modes are formed at both ends and then superimposed to form a standing wave in the microwave heating cavity. By continuously chan...
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The invention relates to the field of microwave heating, in particular to a dual-port microwave heating device capable of improving microwave heating uniformity, and the problem that in the prior art,the heating uniformity and the microwave absorption efficiency are low is solved. The dual-port microwave heating device comprises a microwave heating cavity, a microwave feed-in source, and microwave phase adjusting devices arranged on the two sides of the heating cavity; the microwave phase adjusting devices are connected with the microwave feed-in source through a radiator; and the microwave heating cavity is a single-mode cavity used for reducing reflection by adjusting the size of the cavity and the feeding position. By virtue of the dual-microwave feed-in source and the single-mode cavity microwave heating cavity capable of effectively controlling phase change, the uniformity of microwave heating is greatly improved; and the energy in the waveguide is guaranteed to be fed into the cavity, so that the energy mutual coupling between the two ports is reduced, the microwave utilization rate is improved, and the equipment damage rate is lowered.
Description
technical field [0001] The invention relates to the field of microwave heating, in particular to a method for improving the uniformity of microwave heating and a dual-port microwave heating device thereof. Background technique [0002] With the continuous development of science and technology, microwave energy, as a new type of high-efficiency clean energy, has been used more and more in various fields such as food processing, chemical industry, and medicine. Compared with traditional heating methods, microwave heating has the characteristics of high efficiency and energy saving, selective heating, clean and pollution-free, etc. Nowadays, microwave heating has been widely used in many fields. [0003] The process of microwave heating is that the object to be heated acts on a high-frequency electromagnetic field, absorbs microwave energy, and converts it into heat energy. Microwaves can penetrate the interior of the material for heating, achieving the effect of simultaneous ...
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IPC IPC(8): H05B6/68H05B6/72
Inventor 朱铧丞黄卡玛杨阳
Owner SICHUAN UNIV