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Transversely uniform microwave oven

A microwave heating furnace and uniform technology, applied in the field of microwave ovens, can solve problems such as difficult calculation, complicated measurement, and exceeding the complexity of microwave heating problems.

Inactive Publication Date: 2019-06-28
成都赛纳为特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the frequency of the working microwave, for a microwave feeder, after selecting its position, shape, and polarization direction, it is very difficult to determine the excitation intensity of several to dozens of modes in the heating cavity. , it is also extremely complicated in actual measurement
However, a large microwave oven needs to use multiple magnetrons as microwave sources, so the number of corresponding microwave feeders is also multiple, and the complexity of microwave oven heating is beyond people's imagination.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Such as figure 1 and 2 .

[0092] A horizontally uniform microwave heating furnace includes a heating chamber and a radiation array. The radiation array includes 4 rows of radiators 1 along the Z axis and 8 columns of radiators 1 along the X axis. The radiation array radiates microwave energy to the heating chamber 3 through the floor 2 .

[0093] The radiators 1 on the radiation array are evenly distributed along the X direction and along the Z direction. At the same time, the microwaves radiated by all radiators 1 on the radiation array are coherent waves. The microwaves radiated by all the radiators 1 arranged in the same row along the X-axis on the radiation array have the same amplitude and the same phase. The microwaves radiated by any two adjacent radiators 1 belonging to the same row on the same radiation array along the Z axis have the same amplitude and opposite phases.

[0094] The microwaves radiated by all the radiators 1 on the radiation array have a...

Embodiment 2

[0098] Such as image 3 and 4 shown.

[0099] Compared with Embodiment 1, the only difference is that the radiator 1 is a patch antenna. The antenna mainly includes a metal sheet on the surface of the dielectric material sheet supported by a dielectric material sheet and a microwave excitation structure on the other surface of the dielectric material sheet opposite to the metal sheet. The distance between the centers of adjacent patch antennas along the Z axis is 3 / 5-9 / 10 of the wavelength of the working microwave free space. The distance between the centers of adjacent patch antennas along the X axis is less than half of the wavelength of the working microwave free space. The shape of the patch antenna is rectangular.

[0100] Different from the rectangular waveguide propagating the TE10 mode in Example 1, the patch antenna here radiates microwave energy through its two long sides perpendicular to the X axis.

Embodiment 3

[0102] Such as Figure 5 and 6 shown.

[0103] Compared with Embodiment 1, the only difference is that the radiator 1 is a coaxial antenna. The coaxial antenna here uses a coaxial line to feed microwave energy. The outer conductor of the coaxial line and the medium between the outer conductor and the inner conductor are cut off, but its inner conductor protrudes into free space. A metal disc is attached to the top of the inner conductor.

[0104] The distance between the centers of the adjacent coaxial antennas adjacent along the X axis and adjacent along the Z axis is 3 / 5~9 / 10 of the wavelength of the working microwave free space. The component of the electric field in the X-axis direction of the microwaves radiated by the radiators 1 arranged in the same column along the Z-axis on the center line of each radiator 1 along the X-axis is zero. The microwaves radiated by the radiators 1 arranged in the same row along the X axis on the same radiation array have a zero compon...

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Abstract

The present invention employs one or two radiation arrays to motivate a higher-mode TEn0 mode (n is an integer larger than or equal to 2) as much as possible at the front portion, the rear portion orthe upper portion of a heating cavity of a transversely uniform microwave oven so as to form standing waves in the heating cavity. The at least one radiation array comprises at least two lines of radiators in a Z direction. The at least one radiation array radiates the microwave energy to the heating cavity through a floor. The radiators on any one radiation array are uniformly distributed in theX direction and the Z direction. The radiated microwaves in all the radiators on the same radiation array are coherent waves. In order to further improve the heating uniformity, a rotary table with transverse translation or processing around a vertical axis of the heating cavity is employed. The microwave mode in the cavity of the transversely uniform microwave oven is controlled to improve the heating uniformity of the transversely uniform microwave oven in the three-dimensional space.

Description

technical field [0001] The present invention relates to microwave ovens. Specifically, it relates to a microwave oven for heating materials uniformly and efficiently using a high-order mode. Background technique [0002] Microwave energy can be used in place of various conventional heating methods. Microwave ovens use microwave energy to heat various foods and materials, and in the field of microwave chemistry, microwave energy is used to speed up various chemical reactions. Microwave energy is also used in the production of various materials such as nanomaterials and synthetic diamonds. [0003] In the traditional heating process, heat is conducted from the outside to the inside of the heated object, which belongs to surface heating, resulting in uneven temperature inside and outside the heated object. In microwave energy heating, microwaves are heated by the action of an electric field, causing the damped vibration of polar molecules to generate heat, which belongs to b...

Claims

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Application Information

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IPC IPC(8): H05B6/72H05B6/70
Inventor 王清源徐立
Owner 成都赛纳为特科技有限公司
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