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Heating device

A heating device and heating chamber technology, applied in electric heating devices, microwave heating, ohmic resistance heating, etc., can solve the problems of uneven heating and uneven heating of the heating object, and achieve the effect of suppressing uneven heating

Pending Publication Date: 2021-11-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A heating device that uses electromagnetic waves to heat an object to be heated has the advantage of being able to heat the object to be heated in a short period of time, but it also has the disadvantage that uneven heating occurs in the object to be heated
For example, in a heating device, the heating chamber is an electrically closed space. Therefore, due to the nature of electromagnetic waves, standing waves of microwaves (2.45 GHz) irradiated into the heating chamber are generated, causing uneven heating in the heating object.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0044] figure 1 It is a schematic diagram showing a schematic configuration of the heating device 1 according to Embodiment 1, and is described through the wall surface of the heating chamber 11 in order to visually confirm the microwave radiation elements 21 a to 21 d and the heating object 31 located inside the heating chamber 11 . The heating device 1 includes a heating chamber 11 , a plurality of microwave radiation elements 21 , a power generator 41 , and a power distribution circuit 42 . A heating object 31 is housed in the heating chamber 11 . For example, the wall surfaces of the heating chamber 11 other than the wall surface on which the heating chamber door is provided are made of metal shielding plates. In addition, an electromagnetic wave shielding structure is provided on the heating chamber door. Thus, the heating chamber 11 forms an electrically closed space in which microwaves are sealed.

[0045] The power generator 41 is a power generator that generates mi...

Embodiment approach 2

[0127] Figure 18 It is a perspective view which shows the structure of the heating apparatus 1F of Embodiment 2. also, Figure 19 It is a plan view showing the structure of the heating device 1F. exist Figure 18 and Figure 19 In the figure, the microwave radiating elements 21a to 21f and the object to be heated 31 located in the heating chamber 11 are visually recognized, and the description is made through the wall of the heating chamber 11, and descriptions of the power generation device 41 and the power distribution circuit 42 are omitted. The heating device 1F includes six microwave radiation elements (N=3) in the heating chamber 11 .

[0128] The heating chamber 11 has a rectangular parallelepiped shape having a bottom surface 11a, a top surface 11b, and a side surface 11c, and a heating chamber door 11d is provided on one side surface 11c. The side surface other than the heating chamber door 11d is provided as an electromagnetic wave shielding plate, and since th...

Embodiment approach 3

[0142] Figure 20 It is a perspective view which shows the structure of the heating apparatus 1G of Embodiment 3. also, Figure 21 It is a plan view showing the structure of the heating device 1G. exist Figure 20 and Figure 21 In the figure, in order to visually recognize the microwave radiation elements 21a to 21h and the object to be heated 31 located in the heating chamber 11, the description is made through the wall surface of the heating chamber 11, and descriptions of the power generation device 41 and the power distribution circuit 42 are omitted. Moreover, 1 G of heating apparatuses are equipped with 8 microwave radiation elements (N=4) in the heating chamber 11.

[0143] like Figure 20As shown, the heating chamber 11 is in the shape of a cuboid having a bottom surface 11a, a top surface 11b, and a side surface 11c, and a heating chamber door 11d is provided on one side surface 11c. The side surface other than the heating chamber door 11d is provided as an ele...

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Abstract

Microwave power is distributed by advancing feeding phases by a phase difference of 360 degree / 2N in a clockwise or counterclockwise direction with respect to microwave radiation elements (21a through 21d) which are rotation-symmetrically disposed about a reference line (10) on a plane located on the top surface (11b) side of a heating chamber (11).

Description

technical field [0001] The present invention relates to a heating device for heating an object to be heated using electromagnetic waves. Background technique [0002] A heating device that heats an object to be heated using electromagnetic waves has the advantage of being able to heat the object to be heated in a short time, but has the disadvantage that uneven heating occurs in the object to be heated. For example, in a heating device, since the heating chamber is an electrically closed space, standing waves of microwaves (2.45 GHz) irradiated into the heating chamber are generated due to the nature of electromagnetic waves, causing heating unevenness in the object to be heated. [0003] As a prior art to solve this problem, there is a heating device described in Patent Document 1, for example. In this heating device, the intensity distribution of the heating amount required for the object to be heated is detected, and the output of microwaves is controlled based on the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/72
CPCH05B6/6482H05B6/664H05B6/686H05B6/72H05B2206/044
Inventor 板仓洋大岛毅
Owner MITSUBISHI ELECTRIC CORP
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