Small-sized microwave oven with precession rotating disc

A microwave heating furnace and turntable technology, applied in the field of microwave ovens, can solve problems such as complex measurement, difficult calculation, and excessive 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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AI-Extracted 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 extreme...

Method used

[0128] Compared with Embodiment 5, the only difference is that one of the radiation arrays is placed behind the heating chamber 3, and microwave energy is radiated from the rear to the heating chamber 3. The Z axis is parallel to the vertical direction of the heating chamber. With this arrangement, in the heating cavity, the microwave field of the TE40 mode, the main working mode of the incident wave from the bac...

Abstract

The invention discloses a small-sized microwave oven with a precession rotating disc. The small-sized microwave oven with the precession rotating disc adopts one to two radiation arrays to be arrangedbehind or above a heating cavity of the small-sized microwave oven with the precession rotating disc to stimulate a higher-order-mode TEn0 mode (n is an integer, and is greater than or equal to 2) asmuch as possible so as to form standing waves in the heating cavity. The small-sized microwave oven comprises the heating cavity, at least one radiation array and the rotating disc located at the bottom of the heating cavity, the at least one radiation array each comprises at least two rows of radiators along the Z axis, and the radiation arrays radiate microwave energy to the heating cavity through a floor, the rotating disc rotates along the central axis in the perpendicular direction and proceed around the central line in the perpendicular direction of the heating cavity simultaneously. Compared with multiple resonance modes under which in a traditional microwave oven, microwave sources simultaneously stimulate respective energy in the heating cavity through waveguide and coupling holes so that control is difficult, the field distribution of the working mode of the small-sized microwave oven is determined and can be controlled; in order to further improve the heating uniformity, inventors use the rotating disc which can transversely and horizontally move or can proceed around the perpendicular axis of the heating cavity; according to the small-sized microwave oven with the precession rotating disc, the heating uniformity of the small-sized microwave oven with the precession rotating disc in a three-dimensional space is improved by controlling the microwave mode in a hollowcavity of the small-sized microwave oven with the precession rotating disc; and the small-sized microwave oven can be used for heating various materials or accelerating the speed of chemical reaction.

Application Domain

Domestic stoves or rangesLighting and heating apparatus +2

Technology Topic

Standing waveMultiple resonance +11

Image

Examples

Experimental program(17)

Example Embodiment

[0078] Implementation example 1

[0079] Such as figure 1 with 2.

[0080] A 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 cavity through the floor 2.

[0081] 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 the radiators 1 located 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 in the same column along the Z axis on the same radiation array have the same amplitude and opposite phases.

[0082] The microwaves radiated by all the radiators 1 on the radiation array point to the X direction in the direction of the electric field on the center line of each radiator 1 along the Z axis.

[0083] The arbitrary radiator 1 is a rectangular waveguide. The working mode of the microwave in the rectangular waveguide is the fundamental mode TE10 mode.

[0084] The length Lz of the rectangular waveguide opening along the Z axis is 3/5-9/10 of the wavelength of the working microwave free space. The length Lx of the rectangular waveguide opening along the X axis is less than half of the wavelength of the working microwave free space.

Example Embodiment

[0085] Implementation example 2

[0086] Such as image 3 with 4 Shown.

[0087] Compared with Embodiment 1, the only difference is that the radiator 1 is a patch antenna. The antenna mainly includes a metal sheet radiator on the surface of the dielectric material plate supported by a dielectric material plate and a microwave excitation structure on the other side of the dielectric material plate opposite to the metal sheet radiator. The distance between the centers of the patch antennas adjacent to each other along the Z axis is 3/5-9/10 of the wavelength of the working microwave free space. The distance between the centers of the patch antennas adjacent along the X axis is less than half of the wavelength of the working microwave free space. The patch antenna is rectangular.

[0088] Unlike the rectangular waveguide that propagates the TE10 mode in Example 1, the patch antenna here radiates microwave energy through its two long sides perpendicular to the X axis.

Example Embodiment

[0089] Implementation example 3

[0090] Such as Figure 5 with 6 Shown.

[0091] Compared with Embodiment 1, the only difference is that the radiator 1 is a coaxial antenna. The coaxial antenna here adopts 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 the inner conductor extends into the free space. A metal disc is connected to the top of the inner conductor.

[0092] The distance between the centers of the 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 along the Z axis and belonging to the same column on the same radiation array on the center line of each radiator 1 along the X axis is zero. The component of the electric field in the Z-axis direction of the microwaves radiated by the radiators 1 arranged along the X axis and belonging to the same row on the same radiation array on the center line of each radiator 1 along the Z axis is zero.

[0093] Unlike the rectangular waveguide that propagates the TE10 mode in Example 1, the coaxial antenna here uniformly radiates in-phase microwave energy through the circumference of its metal disc. The microwaves radiated by any two adjacent coaxial antennas arranged in the same row along the X axis on the radiation array have the same amplitude and opposite phases. The microwaves radiated by any two adjacent coaxial antennas in the same column arranged along the Z axis on the same radiation array have the same amplitude and opposite phases.

PUM

Description & Claims & Application Information

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