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microwave heating device

A microwave heating device and microwave technology, applied in microwave heating, electric heating device, electric/magnetic/electromagnetic heating and other directions, can solve the problems of high heating performance, poor uniformity, insufficient microwave stirring, etc., and achieve uniform heating distribution, high heating performance effect

Active Publication Date: 2017-04-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because, if only the radiation of circularly polarized waves is used without a drive mechanism, it is different from a general structure with a drive mechanism (for example, a structure that rotates a table on which an object to be heated is placed, or a structure that rotates an antenna, etc.) In contrast, the stirring of the microwave is not sufficient, so the uniformity is poor
[0015] In addition, in the microwave heating devices of Patent Documents 1 to 3, only the performance of uniformly heating the object to be heated placed in a wide range is required, and it is not required to achieve high performance for the object to be heated placed in the center of the heating chamber. Local microwave concentration of the heating performance etc.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] Figure 1 to Figure 6 It is an explanatory diagram of the microwave heating device according to Embodiment 1 of the present invention. figure 1 It is a perspective view showing the overall structure. figure 2 It is a plan view explaining the positional relationship among a microwave radiation part, a waveguide, and a microwave generation part. image 3 It is a perspective view for explaining the relationship between the dimension of a rectangular waveguide and a transmission mode. Figure 4 It is a relationship explanatory diagram for explaining the relationship among the electric field, magnetic field, and current generated in a rectangular waveguide. Figure 5 (a) is a relationship explanatory diagram for explaining the relationship between the distance to the end portion of the waveguide and the phase of the electric field, Figure 5 (b) is an explanatory diagram for explaining the relationship between the spread of radiated microwaves and the phase change of th...

Embodiment approach 2

[0152] Hereinafter, the specific structure, operation and effect of the microwave heating device according to the second embodiment will be described. Figure 7 It is an explanatory diagram of a microwave heating device according to Embodiment 2 of the present invention, and is a diagram illustrating the positional relationship among a microwave radiation unit, a first microwave radiation unit, a second microwave radiation unit, a waveguide, and a microwave generation unit. In addition, in the figure, the parts showing the same operations as those of the first embodiment described above are given the same reference numerals. In addition, the basic operation of the microwave heating device of the second embodiment is substantially the same as that of the microwave heating device of the first embodiment described above, and unless it is the gist of the invention, the description will be omitted. The specific structure, function and effect of the second embodiment will be describe...

Embodiment approach 3

[0182] Hereinafter, the specific structure, operation and effect of the third embodiment will be described.

[0183] Figure 8 ~ Figure 10 It is an explanatory drawing of the microwave heating apparatus in Embodiment 3 of this invention. Figure 8 It is a figure explaining the positional relationship among the microwave radiation part, the 1st microwave radiation part, the 2nd microwave radiation part, the microwave radiation part which emits a circularly polarized wave, a waveguide, and a microwave generation part. Figure 9 It is an explanatory diagram showing an example of the shape of a microwave radiation portion that emits circularly polarized waves. Figure 10 It is a relationship explanatory diagram for explaining the relationship between the crossing angle of the X-shaped microwave radiation part where two long holes intersect and the radiation direction of the microwave, and the result was obtained by electromagnetic field analysis. In addition, in the figure, the ...

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Abstract

The invention provides a microwave heating device of high heating performance, wherein a plurality of microwave radiation parts are arranged along the tube axis of a waveguide tube. The plurality of microwave radiation parts are composed of first microwave radiation parts and second microwave radiation parts. The first microwave radiation parts are configured in an opening shape with more than one long holes, wherein the long axis direction of the long holes is at an angle smaller than 45 degrees relative to the tube axis of the waveguide tube and the included angle of the second microwave radiation parts relative to the tube axis of the waveguide tube is larger than 45 degrees. In this way, to-be-heated objects placed in a larger range can be heated uniformly. Meanwhile, to-be-heated objects at the center of a heating chamber are heated efficiently in a concentrated manner.

Description

technical field [0001] The present invention relates to a microwave heating device, such as a microwave oven, which radiates microwaves to an object to be heated to perform medium heating, and particularly relates to a microwave heating device characterized in the structure of a microwave radiation part. Background technique [0002] A microwave oven exists as a representative microwave heating device for heating an object with microwaves. In a microwave oven, microwaves generated by a microwave generator such as a magnetron are radiated into a heating chamber made of metal, and an object inside the heating chamber, that is, an object to be heated, is medium-heated by the radiated microwaves. [0003] As a microwave generator of a conventional microwave oven, a magnetron is used. Microwaves generated by the magnetron are radiated into the heating chamber through the waveguide. [0004] As a means of changing the distribution of microwaves to the object to be heated inside ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B6/72
CPCH05B6/708
Inventor 细川大介吉野浩二贞平匡史久保昌之信江等隆大森义治
Owner PANASONIC CORP