WO2018179459A1

WO2018179459A1 - Microwave device

Info

Publication number: WO2018179459A1
Application number: PCT/JP2017/020561
Authority: WO
Inventors: 浩嗣房安; 松原　亮; 長嶋　貴志
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2017-03-29
Filing date: 2017-06-02
Publication date: 2018-10-04
Also published as: JPWO2018179459A1; JP6854406B2

Abstract

A microwave device (10) is provided with: a heating chamber (21); a microwave supply unit (40) that supplies microwaves to the heating chamber (21); a first stirring unit (30) that stirs the microwaves in the predetermined direction, said microwaves having been supplied to the heating chamber (21); and a second stirring unit (60) that stirs the microwaves in the direction that is different from the predetermined direction.

Description

Microwave equipment

The present disclosure relates to a microwave device that dielectrically heats an object to be heated.

Conventionally, a microwave device that heats an object to be heated using a microwave is known. As this type of microwave device, for example, in Patent Document 1, there are two heating chambers in which an object to be heated is disposed, microwave generation means for generating microwaves, and two microwaves that radiate the generated microwaves into the heating chamber. A microwave device is disclosed that includes a rotating antenna and two motors that rotate each of the two rotating antennas. This microwave device has a structure in which one of the two rotating antennas radiates microwaves from the top of the heating chamber, and the other rotating antenna radiates microwaves from the bottom of the heating chamber.

JP 2008-258091 A

However, in the microwave device disclosed in Patent Document 1, two motors are arranged above and below the heating chamber, and the rotation axes of the motors are arranged in parallel to each other. Therefore, when radiating microwaves using two rotating antennas, the direction of stirring and radiating microwaves is the same direction with the two rotating antennas, and the object to be heated cannot be efficiently heated, There may be uneven heating.

Therefore, an object of the present disclosure is to provide a microwave device that can suppress uneven heating of an object to be heated.

In order to achieve the above object, a microwave device according to one embodiment of the present disclosure includes a heating chamber, a microwave supply unit that supplies microwaves to the heating chamber, and a microwave supplied to the heating chamber in a predetermined direction. And a second stirring unit for stirring the microwave in a direction different from the predetermined direction.

According to the microwave device according to one embodiment of the present disclosure, uneven heating of the object to be heated can be suppressed.

FIG. 1 is a perspective view showing an overall configuration of a microwave device according to an embodiment. FIG. 2 is a side cross-sectional view of the microwave device shown in FIG. 1 taken along line II-II. FIG. 3 is a diagram illustrating a first stirring unit and a second stirring unit of the microwave device according to the embodiment. FIG. 4 is a diagram when the second stirring blade of the microwave device according to the embodiment is viewed from the axial direction of the second axis. FIG. 5 is a block diagram illustrating a control configuration of the microwave device according to the embodiment. FIG. 6 is a flowchart showing the operation of the microwave device according to the embodiment. FIG. 7 is a side sectional view of the microwave device according to Modification 1 of the embodiment. FIG. 8 is a diagram illustrating a third stirring unit of the microwave device according to the second modification of the embodiment. FIG. 9 is a diagram illustrating a second stirring unit of the microwave device according to the third modification of the embodiment.

Hereinafter, the microwave device of the present disclosure will be described in detail with reference to the drawings. Note that each of the embodiments and modifications described below shows a preferred specific example of the present disclosure. Accordingly, the numerical values, shapes, materials, components, component arrangement and connection forms, steps, order of steps, and the like shown in the following embodiments and modifications are examples, and are not intended to limit the present disclosure. . Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present disclosure are described as arbitrary constituent elements.

In addition, in order for those skilled in the art to provide a full understanding of the present disclosure, the accompanying drawings and the following description are provided, and are not intended to limit the claimed subject matter.

Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description may be abbreviate | omitted or simplified.

Also, the Z direction in the drawings used for explanation in the following embodiments represents the vertical direction that is the height direction of the microwave device. The X direction and the Y direction are directions orthogonal to each other on a plane perpendicular to the Z direction.

(Embodiment 1)
Hereinafter, a microwave device 10 according to the present embodiment will be described with reference to FIGS. The microwave device 10 is used as an industrial microwave device when performing molding, kneading, granulation and the like. In the present embodiment, a microwave device 10 for molding a resin material will be described as an example.

[1. Configuration of microwave device]
First, the configuration of the microwave device 10 according to the present embodiment will be described with reference to FIGS.

FIG. 1 is a perspective view showing an overall configuration of a microwave device 10 according to an embodiment. FIG. 2 is a side cross-sectional view of the microwave device 10 as viewed by cutting along the line II-II in FIG. FIG. 3 is a diagram illustrating the first stirring unit 30 and the second stirring unit 60 of the microwave device 10. In FIG. 1, in order to show the state of the heating chamber 21, a part of the housing 20 is shown exploded from the microwave device 10. In FIG. 3, the first stirring unit 30 and the second stirring unit 60 are extracted from the microwave device 10.

As shown in FIGS. 1 to 3, the microwave device 10 includes a housing 20 having a heating chamber 21, a microwave supply unit 40 that supplies microwaves to the heating chamber 21, and a microwave supplied to the heating chamber 21. The 1st stirring part 30 and the 2nd stirring part 60 which stir a wave are provided. The microwave device 10 includes a control unit 50 that controls driving of the microwave device 10 and a base unit 26 that supports the housing 20 from below.

The housing 20 constitutes the appearance of the microwave device 10. The housing | casing 20 is comprised from the metal material. A heating chamber 21 is provided in the housing 20.

The heating chamber 21 is a substantially rectangular parallelepiped box body for dielectric heating (microwave heating) of the object to be heated OJ (specifically, the object to be heated OJ spread on the molding die 80).

In the heating chamber 21, a molding die 80 and a mounting table 85 are disposed. The object to be heated OJ before heating is put into the molding die 80. The article to be heated OJ is a pellet-shaped resin material for producing a resin molded product.

The molding die 80 is made of a material that has high heat resistance and generates heat by microwaves. In the present embodiment, the mold 80 is made of silicone rubber containing a material that generates heat by microwaves. The molding die 80 includes an upper die 81 and a lower die 82. The upper die 81 has a rectangular parallelepiped shape. The lower mold 82 has a raised structure, and includes a lower mold body 84 and a leg portion 83 (an example of a lower mold leg portion) connected to the lower mold body 84.

At least one of the upper mold 81 and the lower mold 82 is formed with a concave or convex portion corresponding to the shape of the resin molded product in advance, and a space formed when the upper mold 81 and the lower mold 82 are combined. The object to be heated OJ is spread over. And the to-be-heated material OJ is heated and melted by the microwave, and goes into the space. Thereafter, by cooling, the melted heated object OJ is solidified to produce a resin molded product having a predetermined shape.

The mounting table 85 is a table on which the molding die 80 on which the object to be heated OJ is spread is mounted. The mounting table 85 is made of a low-loss dielectric material such as phenolic resin, ceramic, or glass, and has a property that microwaves can be easily transmitted. In the present embodiment, the mounting table 85 is detachably attached to the microwave device 10, but the mounting table 85 may be fixed to the microwave device 10 in advance.

The heating chamber 21 has a lower frame 28 positioned below the molding die 80 and the mounting table 85, a front plate 29a positioned on the front side (X direction minus side), and a rear side (X direction plus side). The rear plate 29b is positioned, and the cover frame 27 is positioned on the side surface and the upper side. The front plate 29 a, the rear plate 29 b, and the cover frame 27 are formed of the same metal material as that of the housing 20. The lower frame 28 is made of a metal material that does not have magnetism. The inner surface 25 (inner wall) of the heating chamber 21 has a property of reflecting the microwave supplied to the heating chamber 21.

The front plate 29 a of the heating chamber 21 is provided with an openable / closable door 23 for accessing the heating chamber 21. Moreover, the window 24 is formed in at least one part of the door 23, and even if the door 23 is closed, the user can confirm the state in the heating chamber 21. A supply port 21 b for supplying the microwave generated by the microwave supply unit 40 to the heating chamber 21 is formed in the rear plate 29 b of the heating chamber 21.

The microwave supply unit 40 includes a magnetron 41 that generates microwaves, and a waveguide 42 that guides the generated microwaves to the supply port 21 b of the heating chamber 21. The magnetron 41 is a device that oscillates a high frequency of 300 MHz to 300 GHz, for example. The waveguide 42 is made of a cylindrical metal material. A magnetron 41 is fixed to one end side of the waveguide 42. The other end side of the waveguide 42 is connected to the supply port 21 b of the heating chamber 21.

The first stirring unit 30 is provided in the supply port 21b. Specifically, the first stirring unit 30 is disposed along the first axis a <b> 1 that faces the inside of the heating chamber 21. The first axis a1 is, for example, an axis that is parallel to the lower frame 28 and faces the object to be heated OJ (towards the center of the heating chamber 21).

The first stirring unit 30 includes a first stirring blade 31, a coupling unit 32, and a first motor 39.

The first stirring blade 31 is an antenna that stirs the microwave guided to the supply port 21b and radiates it into the heating chamber 21, and is formed of a metal material including, for example, aluminum or copper. The 1st stirring blade 31 is arrange | positioned inside the heating chamber 21 rather than the supply port 21b.

The first stirring blade 31 is a propeller in which flat plates are arranged at a predetermined angle (see FIG. 3). In the present embodiment, the three flat plates are arranged at substantially equal angular intervals. In addition, the 1st stirring blade 31 is not limited to being comprised with a flat plate. The first stirring blade 31 has a rotationally asymmetric shape when the first stirring blade 31 is viewed from the axial direction of the first axis a1. The rotational asymmetry here means the property that when the first stirring blade 31 is rotated about the first axis a1, the same figure is not obtained unless it is rotated once as viewed from the axial direction of the first axis a1.

The coupling portion 32 is a member that connects the first stirring blade 31 and the first motor 39. Specifically, the coupling portion 32 is connected to the first stirring blade 31 in the heating chamber 21, passes through the supply port 21 b, reaches the inside of the waveguide 42, and is connected to the shaft of the first motor 39. Yes. The coupling part 32 is made of a conductive material.

The first motor 39 is fixed to the outside of the waveguide 42. By driving the first motor 39, the first stirring blade 31 is rotated about the first axis a1. The rotation period of the first stirring blade 31 is, for example, 15 seconds.

In the microwave device 10, by rotating the first stirring blade 31, the microwave supplied from the microwave supply unit 40 is stirred and radiated in a predetermined direction. In this way, the microwave is stirred and radiated, so that the microwave is spread throughout the heating chamber 21 or the article to be heated OJ is heated.

Here, the predetermined direction in which the microwave is radiated by stirring is a direction including a predetermined directivity angle with the first axis a1 as the central axis, and the microwave radiated from the first stirring blade 31 is directed. It has sex. Therefore, heating unevenness may occur in the article to be heated OJ only by heating based on the microwave irradiated from the first stirring unit 30. Therefore, in the microwave device 10 of the present embodiment, in addition to the first stirring unit 30, a second stirring unit 60 shown below is provided.

As shown in FIG. 2, the second stirring unit 60 is disposed along a second axis a2 that intersects the first axis a1. Specifically, the second axis a2 faces the object to be heated OJ in the heating chamber 21, and is orthogonal to the first axis a1.

The second stirring unit 60 includes a second stirring blade 61 and a support member 62 provided in the heating chamber 21, and a driving unit 66 provided outside the heating chamber 21.

The second stirring blade 61 is a reflecting member that reflects and further stirs the microwave in the heating chamber 21 stirred by the first stirring unit 30, and is formed of, for example, a metal material containing aluminum or copper. Yes. As described above, since the second stirring unit 60 is disposed so that the second axis a2 intersects the first axis a1, the microwaves emitted from the second stirring blade 61 are not mixed with the first stirring unit 61. The microwave radiated from the blade 31 has directivity in a different direction.

The second stirring blade 61 is a single blade formed of a flat plate (see FIG. 3). The shape of the second stirring blade 61 is a rotationally asymmetric shape when the second stirring blade 61 is viewed from the axial direction of the second axis a2. Note that the second stirring blade 61 may be formed of a prism or a cylinder, or may be formed of a plurality of blades.

The second stirring blade 61 is disposed on the lower side of the lower mold body 84 of the molding die 80. Specifically, the second stirring blade 61 is disposed at a position closer to the article to be heated OJ than the first stirring blade 31. In other words, the second stirring blade 61 includes the heating chamber 21 such that the interval L2 between the second stirring blade 61 and the object to be heated OJ is smaller than the interval L1 between the first stirring blade 31 and the object to be heated OJ. Is placed inside. Since the 2nd stirring blade 61 is arrange | positioned near the to-be-heated material OJ, the microwave reflected with the 2nd stirring blade 61 can be efficiently irradiated to the to-be-heated material OJ.

The support member 62 is a member that supports the second stirring blade 61, and includes a support 62a and a disk-shaped base plate 62b. One end of the column 62a is connected to the second stirring blade 61, and the other end of the column 62a is connected to the center of the base plate 62b. A first magnet 62c is provided on a part of the outer periphery of the base plate 62b. The support member 62 is formed of the same material as the second stirring blade 61. However, the support member 62 may be formed of a metal material different from that of the second stirring blade 61, a ceramic material, a heat resistant resin material, or the like.

The support member 62 supports the second stirring blade 61 in a state where the base plate 62 b is in contact with the lower frame 28. Further, the support member 62 is arranged so that the axis of the support column 62a substantially coincides with the second axis a2. The second stirring blade 61 is supported by the support member 62 so as to be rotatable about the second axis a2.

The drive unit 66 is a drive device that rotates around the second axis a2 while attracting the support member 62 with a magnetic force. The drive unit 66 includes a disk-shaped counter plate 67 and a second motor 69.

The opposing plate 67 is disposed at a position facing the base plate 62b with the lower frame 28 interposed therebetween. The counter plate 67 is provided with a second magnet 67a that attracts the first magnet 62c with a magnetic force. The second magnet 67a is provided on a part of the outer periphery of the counter plate 67 so as to correspond to the position of the first magnet 62c.

The second motor 69 is located on the lower side of the opposing plate 67 and is disposed on the convex portion 26 a of the base portion 26. The shaft of the second motor 69 is connected to the center of the counter plate 67. By the rotation driving of the second motor 69, the second magnet 67a of the counter plate 67 rotates, and the first magnet 62c attracted to the second magnet 67a rotates. As the first magnet 62c rotates, the base plate 62b rotates and the second stirring blade 61 rotates. Unlike the rotation period of the 1st stirring blade 31, the rotation period of the 2nd stirring blade 61 is 16 seconds, for example.

In addition, the rotation period of the 2nd stirring blade 61 is not the double period of the rotation period of the 1st stirring blade 31, etc., but the rotation period of the 1st stirring blade 31 and the rotation period of the 2nd stirring blade 61 were match | combined. Combinations that increase the period are preferred.

FIG. 4 is a view when the second stirring blade 61 of the microwave device 10 is viewed from the axial direction of the second axis a2. As shown in FIG. 4, when the second stirring blade 61 is viewed from the axial direction of the second axis a2, a rotation region R2 formed by rotating the second stirring blade 61 overlaps the object to be heated OJ. However, it is preferable that all of the object to be heated OJ enter (all are included) in the rotation region R2, but a part of the rotation region R2 may overlap the object to be heated OJ.

The stirring blade disposed so that the rotation region R2 overlaps the object to be heated OJ is a stirring blade (second stirring blade 61 in the present embodiment) located at a position close to the object to be heated OJ. This is not the case for the stirring blades at the far position (second stirring blade 31 in this embodiment).

In the present embodiment, by rotating the second stirring blade 61, the microwave radiated from the first stirring portion 30 is further stirred and reflected, and the microwave is reflected in a direction different from the first stirring blade 31. Can be emitted. Thereby, the heating unevenness of the to-be-heated object OJ arrange | positioned in the heating chamber 21 can be suppressed.

FIG. 5 is a block diagram showing a control configuration of the microwave device 10. When attention is paid to the control configuration, the microwave device 10 includes a control unit 50, a magnetron 41, a first motor 39, and a second motor 69 connected to the control unit 50, respectively.

The control unit 50 is a control device that performs output control of the magnetron 41 and rotation control of the first motor 39 and the second motor 69. The output control of the magnetron 41 includes, for example, control for causing the magnetron 41 to start and stop the output of microwaves. The rotation control of the first motor 39 and the second motor 69 is a control for starting and stopping the rotation of the first stirring blade 31 and the second stirring blade 61 by controlling the first motor 39 and the second motor 69. As well as control of the rotational speed.

The control unit 50 is specifically a microcomputer, but may be realized by a processor or a dedicated circuit. The control unit 50 may include a timer that measures the oscillation time of the microwave, a storage unit that stores a control program executed by the control unit 50, and the like. Alternatively, the microwave device 10 may include a timer unit that measures a microwave oscillation time or the like as a component different from the control unit 50 and a storage unit that stores a control program executed by the control unit 50.

In the above description, the power supply unit that supplies power to the first motor 39, the second motor 69, the magnetron 41, and the like is not shown. The power supply unit may be controlled by the control unit 50 to supply power.

[2. Operation of microwave device]
Next, the operation of the microwave device 10 will be described with reference to FIG.

FIG. 6 is a flowchart showing the operation of the microwave device 10. FIG. 6 is a flowchart in the case where an instruction to start molding is received from the user in a state where the molding die 80 in which the object to be heated OJ is spread is placed on the mounting table 85. The instruction to start molding from the user is an instruction input from the user via an input unit (not shown) provided in the microwave device 10, for example.

When the control unit 50 obtains the molding start instruction, the control unit 50 sequentially performs the following steps of heat treatment start (S11), heat treatment end (S12), and cooling (S13).

First, at the start of heat treatment (S11), the control unit 50 outputs the microwave from the magnetron 41, the rotation of the first stirring blade 31 at the first rotation speed, and the second stirring blade 61. Start rotation at the rotation speed. The control unit 50 may read out information related to the output of the microwave stored in the storage unit and information related to the rotation speeds of the first stirring blade 31 and the second stirring blade 61, and may perform step S11 based on the information. The information may be acquired from the user, and step S11 may be performed according to the acquired instruction.

Here, the first rotation speed is the rotation speed when the first stirring blade 31 is rotated. The rotation period of the first stirring blade 31 is, for example, 15 seconds. The second rotation speed is a rotation speed when the second stirring blade 61 is rotated. The rotation period of the second stirring blade 61 is, for example, 16 seconds. The rotation period of the second stirring blade 61 may be 14 seconds, for example. Further, the rotation period of the second stirring blade 61 may be, for example, a fluctuation period that fluctuates from 14 seconds to 16 seconds or fluctuates from 16 seconds to 14 seconds in a predetermined period. The fluctuation period in this case is controlled by the control unit 50.

Also, the start of microwave output, the start of rotation of the first stirring blade 31 and the start of rotation of the second stirring blade 61 may or may not be performed simultaneously. For example, the control unit 50 may start the output of the microwave from the magnetron 41 after starting the rotation of the first stirring blade 31 and the second stirring blade 61.

Further, evacuation may be performed on the inside of the molding die 80 during the heating by the microwave. For example, vacuuming may be performed so that the inside of the molding die 80 has a predetermined degree of vacuum. The predetermined degree of vacuum is a degree of vacuum to the extent that air present in the molding die 80 does not substantially affect the resin molded product when resin molding is performed. Note that vacuuming is not performed on the heating chamber 21 itself.

Next, after the heat treatment necessary for the article to be heated OJ is performed, the heat treatment is finished (S12). Specifically, the control unit 50 stops the output of the microwave and the rotation of the first stirring blade 31 and the second stirring blade 61.

Control part 50 will perform the cooling process which cools and solidifies the to-be-heated to-be-heated object OJ, if the above-mentioned heating process is completed (S13). Specifically, forced cooling is performed by sending air into the heating chamber 21 using a fan. By executing the steps shown in S11 to S13, a resin molded product in which uneven heating is suppressed can be obtained.

[3. Effect etc.]
As described above, the microwave device 10 according to the present embodiment includes the heating chamber 21, the microwave supply unit 40 that supplies the microwave to the heating chamber 21, and the microwave supplied to the heating chamber 21 in a predetermined manner. A first stirring unit 30 that stirs in a direction and a second stirring unit 60 that stirs the microwave in a direction different from a predetermined direction are provided.

According to this, microwaves can be stirred and emitted in different directions in the heating chamber 21. Therefore, for example, microwaves can be irradiated from different directions to the object to be heated OJ disposed in the heating chamber 21, and heating unevenness of the object to be heated OJ can be suppressed. Further, for example, in the structure that radiates microwaves only from the vertical direction as shown in the prior art, the upper and lower surfaces of the object to be heated are heated more than the side surfaces, and heating unevenness is likely to occur, but the microwave according to the present embodiment In the apparatus 10, microwaves can be applied to surfaces (for example, side surfaces and lower surface) in different directions of the object to be heated OJ, and uneven heating of the object to be heated can be suppressed.

Moreover, the heating chamber 21 has a supply port 21b for supplying microwaves from the microwave supply unit 40, and the first stirring unit 30 may be provided in the supply port 21b.

According to this, the microwave supplied from the microwave supply unit 40 can be spread throughout the heating chamber 21 using the first stirring unit 30.

The first stirring unit 30 includes a first stirring blade 31 provided in the heating chamber 21, and the first stirring blade 31 is rotated about the first axis a1 so that microwaves are supplied to the predetermined stirring blade 31. The second stirring unit 60 has a second stirring blade 61 provided in the heating chamber 21, and the second stirring blade 61 is centered on a second axis a2 that intersects the first axis a1. The microwaves may be agitated in a direction different from the predetermined direction.

According to this, microwaves can be stirred and emitted in different directions in the heating chamber 21 using the first stirring blade 31 and the second stirring blade 61. Also, with this structure, for example, microwaves can be emitted in two axial directions intersecting each other, and uneven heating of the article to be heated OJ can be suppressed.

Further, the second stirring blade 61 may be provided at a position closer to the object to be heated OJ disposed in the heating chamber 21 than the first stirring blade 31.

According to this, the microwave reflected by the second stirring blade 61 can be efficiently applied to the object to be heated OJ. In addition, the second stirring blade 61 can be used to irradiate the microwave to the portion of the first stirring blade 31 that is difficult to reach by the microwave radiation. Thereby, uneven heating of the article to be heated OJ can be suppressed.

In addition, when viewed from the axial direction of the second axis a2, the second stirring blade 61 has a rotation region R2 formed by rotating the second stirring blade 61, and the object to be heated disposed in the heating chamber 21. It may be rotated around the second axis a2 so as to overlap OJ.

According to this, the microwave reflected by the second stirring blade 61 can be irradiated to the object to be heated OJ, and uneven heating of the object to be heated OJ can be suppressed.

Further, when viewed from the axial direction of the second axis a2, the second agitating blade 61 rotates around the second axis a2 so that the rotation region R2 overlaps the entire object to be heated OJ. It may be done.

According to this, the microwave reflected by the second stirring blade 61 can be efficiently applied to the object to be heated OJ, and uneven heating of the object to be heated OJ can be suppressed.

Further, when viewed from the axial direction of the second axis a2, the second stirring blade 61 may be rotationally asymmetric.

According to this, in the heating chamber 21, it is possible to suppress the occurrence of bias in the microwave energy distribution, and it is possible to suppress uneven heating of the article to be heated OJ.

The second stirring unit 60 is further provided inside the heating chamber 21 with a support member 62 that supports the second stirring blade 61 and the outside of the heating chamber 21, and is attached to the second shaft while attracting the support member 62 with magnetic force. The second agitating blade 61 may be rotated along with the rotation of the support member 62 by the driving of the driving unit 66.

According to this, the second stirring blade 61 in the heating chamber 21 can be rotated using the drive unit 66 provided outside the heating chamber 21. For this reason, the second stirring unit 60 can be provided without forming a through hole in the heating chamber 21, and leakage of microwaves outside the heating chamber 21 can be suppressed. Moreover, since it is not necessary to form a through hole, the position where the second stirring unit 60 is provided in the heating chamber 21 can be freely changed.

Further, the rotation period of the second stirring blade 61 may be different from the rotation period of the first stirring blade 31.

Further, the heating chamber 21 has a molding die 80 for molding the article to be heated OJ. The molding die 80 has an upper die 81 and a lower die 82, and the lower die 82 is a lower die body. 84 and a leg portion 83 connected to the lower mold main body 84, and the second stirring blade 61 may be disposed below the lower mold main body 84 so as not to interfere with the leg portion 83.

According to this, it is possible to efficiently irradiate the object to be heated OJ in the molding die 80 with the microwave reflected by the second stirring blade 61 located on the lower side of the lower mold 82. Uneven heating of OJ can be suppressed.

(Modification 1 of embodiment)
FIG. 7 is a side cross-sectional view of a microwave device 10A according to Modification 1 of the embodiment. The microwave device 10A according to Modification 1 is different from the microwave device 10 of the embodiment in that the second stirring blade 61 is provided below the mounting table 85.

As shown in FIG. 7, a molding die 80 and a mounting table 85 are disposed in the heating chamber 21. The object to be heated OJ before heating is put into the molding die 80. The molding die 80 includes an upper die 81 and a lower die 82. Each of the upper mold 81 and the lower mold 82 has a rectangular parallelepiped shape.

The mounting table 85 is a table on which the molding die 80 is mounted, and includes a pedestal part 89 and a leg part 88 (an example of a mounting table leg part) connected to the pedestal part 89.

The second stirring blade 61 is disposed below the pedestal portion 89 of the mounting table 85 so as not to interfere with the leg portion 88. The second stirring blade 61 is disposed at a position closer to the object to be heated OJ than the first stirring blade 31. Since the 2nd stirring blade 61 is arrange | positioned near the to-be-heated material OJ, the microwave reflected with the 2nd stirring blade 61 can be efficiently irradiated to the to-be-heated material OJ.

The microwave device 10 </ b> A according to Modification 1 includes a mounting table 85 on which the object to be heated OJ is mounted in the heating chamber 21, and the mounting table 85 includes a pedestal portion 89 and leg portions connected to the pedestal portion 89. 88. The second stirring blade 61 is disposed below the pedestal portion 89 so as not to interfere with the leg portion 88.

According to this, it is possible to efficiently irradiate the object to be heated OJ in the molding die 80 with the microwave reflected using the second stirring blade 61 located below the pedestal portion 89 of the mounting table 85, Uneven heating of the article to be heated OJ can be suppressed.

(Modification 2 of embodiment)
The microwave device according to the second modification of the embodiment includes a third stirring unit 70 in addition to the first stirring unit 30 and the second stirring unit 60.

FIG. 8 is a diagram illustrating a third stirring unit 70 of the microwave device according to the second modification. In addition, in FIG. 8, the 1st stirring part 30, the 2nd stirring part 60, and the 3rd stirring part 70 are extracted and shown among the microwave apparatuses of the modification 2.

The third stirring unit 70 is disposed along a third axis a3 that intersects both the first axis a1 and the second axis a2. Specifically, the third axis a3 is orthogonal to both the first axis a1 and the second axis a2. The third stirring unit 70 includes a third stirring blade 71, a coupling unit 72, and a third motor 79.

The third stirring blade 71 is a reflecting member that reflects and further stirs the microwave in the heating chamber 21 stirred by the first stirring unit 30, and is formed of, for example, a metal material containing aluminum or copper. Yes. The third stirring blade 71 is arranged on the inner side of the heating chamber 21.

The third stirring blade 71 is a propeller in which flat plates are arranged at a predetermined angle. In this modification, the three flat plates are arranged at substantially equal angular intervals. The shape of the third stirring blade 71 has a rotationally asymmetric shape when the third stirring blade 71 is viewed from the axial direction of the third axis a3.

The coupling portion 72 is a member that connects the third stirring blade 71 and the third motor 79. Specifically, the coupling portion 72 is connected to the third stirring blade 71 in the heating chamber 21, passes through a hole formed in the heating chamber 21, and is connected to the shaft of the third motor 79.

The third motor 79 is fixed to the outside of the heating chamber 21. By driving the third motor 79, the third stirring blade 71 is rotated about the third axis a3. The rotation period of the third stirring blade 71 is, for example, 17 seconds.

The third stirring blade 71 is disposed closer to the object to be heated OJ than the first stirring blade 31. In other words, the third stirring blade 71 is arranged in the heating chamber 21 so that the distance L3 between the third stirring blade 71 and the object to be heated OJ is smaller than the distance L1 between the first stirring blade 31 and the object to be heated OJ. Is arranged. Since the 3rd stirring blade 71 is arrange | positioned near the to-be-heated object OJ, the microwave reflected with the 3rd stirring blade 71 can be efficiently irradiated to the to-be-heated object OJ.

The microwave device 10 according to the modification 2 further includes a third stirring unit that stirs the microwave in a direction different from both the direction in which the first stirring unit 30 stirs and the direction in which the second stirring unit 60 stirs. 70.

Thereby, using the first stirring unit 30, the second stirring unit 60, and the third stirring unit 70, the microwaves can be stirred and emitted in different directions in the heating chamber 21. Therefore, for example, microwaves can be irradiated from different directions to the object to be heated OJ disposed in the heating chamber 21, and heating unevenness of the object to be heated OJ can be suppressed.

(Modification 3 of embodiment)
The microwave device according to the third modification of the embodiment has a structure in which the support member 62 itself of the second stirring unit 60A is attracted to the drive unit 66 and rotated.

FIG. 9 is a diagram showing a second stirring unit 60A of the microwave device according to Modification 3. In addition, in FIG. 9, the

1st stirring part

30 and 60 A of 2nd stirring parts are extracted and shown among the microwave apparatuses of the modification 3. In FIG.

The second stirring unit 60A includes a second stirring blade 61 and a support member 62 provided in the heating chamber 21, and a driving unit 66 provided outside the heating chamber 21.

The support member 62 has a support 62a and a base plate 62b composed of three plates arranged radially. One end of the column 62a is connected to the second stirring blade 61, and the other end of the column 62a is connected to the center of the base plate 62b. The base plate 62b is a magnetic body such as iron and is attracted by a second magnet 67a described later.

The drive unit 66 is a drive device that rotates the support member 62 around the second axis a2 while attracting the support member 62 with a magnetic force, and includes a disk-shaped counter plate 67 and a second motor 69.

The opposing plate 67 is disposed at a position facing the base plate 62b with the lower frame 28 interposed therebetween. The opposing plate 67 is provided with a second magnet 67a that attracts one of the three plates of the base plate 62b by magnetic force.

The second motor 69 is disposed below the counter plate 67. The shaft of the second motor 69 is fixed to the rotation center of the counter plate 67. By the rotation driving of the second motor 69, the second magnet 67a of the counter plate 67 rotates and the base plate 62b attracted to the second magnet 67a rotates. Then, with the rotation of the base plate 62b, the support member 62 rotates and the second stirring blade 61 is rotated.

The second stirring blade 61 is two blades formed of a flat plate. The shape of the second stirring blade 61 is 180 ° rotationally symmetric when the second stirring blade 61 is viewed from the axial direction of the second axis a2. The second stirring blade 61 may be formed of a prism or a cylinder, or may be formed of three or more blades.

By rotating the second stirring blade 61 in this way, the microwave stirred by the first stirring unit 30 is further stirred and reflected, and the microwave is emitted in a direction different from the first stirring blade 31. be able to. Thereby, uneven heating of the article to be heated OJ can be suppressed.

(Other embodiments)
As described above, the embodiments and the modifications have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.

Accordingly, among the components described in the attached drawings and detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to exemplify the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

Moreover, since the above-mentioned embodiment and modification are for illustrating the technique in the present disclosure, various modifications, replacements, additions, omissions, and the like can be made within the scope of the claims or an equivalent scope thereof. .

For example, in the present embodiment, the second stirring unit 60 is provided below the heating chamber 21, but the present invention is not limited to this. The second stirring unit 60 may be provided on the upper side of the heating chamber 21. The second stirring unit 60 may be provided on the side surface of the heating chamber 21 so that the second axis a2 is orthogonal to the first axis a1.

For example, when viewed from the axial direction of the first axis a1, the first stirring blade 31 is disposed so that a rotation region formed by rotating the first stirring blade 31 overlaps the object to be heated OJ. May be allowed. Further, the third stirring blade 71 is arranged so that a rotation region formed by rotating the third stirring blade 71 overlaps the object to be heated OJ when viewed from the axial direction of the third axis a3. May be allowed.

For example, in the present embodiment, the first axis a1 and the second axis a2 are orthogonal to each other, but are not necessarily orthogonal and may be non-orthogonal. Further, the third axis a3 and the first axis a1 are not necessarily orthogonal, and may be non-orthogonal. The third axis a3 and the second axis a2 are not necessarily orthogonal, and may be non-orthogonal. These axes are more effective when they are orthogonal, but can also be achieved when they are non-orthogonal. These axes may be on the same plane or may be in a torsional position relationship. These axes are not parallel and are not parallel (non-parallel), so that a great effect can be obtained.

In addition, forms realized by arbitrarily combining the constituent elements and functions shown in the above embodiments and modifications are also included in the scope of the present disclosure.

The present disclosure can be widely used for microwave devices that heat an object to be heated by dielectric heating. In particular, it is useful in microwave devices in various industrial applications such as resin molding.

DESCRIPTION OF

SYMBOLS

10,10A Microwave apparatus 20 Case 21 Heating chamber 21b Supply port 23 Door 24 Window 25 Inner surface 26 Base part 26a Convex part 27 Cover frame 28 Lower frame

29a Standing board

29b Backing board 30 1st stirring part 31 1st 1 stirring blade 32 coupling portion 39 first motor 40 microwave supply portion 41 magnetron 42 waveguide 50

control portion

60, 60A second stirring portion 61 second stirring blade 62 support member 62a column 62b base plate 62c first magnet 66 Driving part 67 Opposing plate 67a Second magnet 69 Second motor 70 Third stirring part 71 Third stirring blade 72 Coupling part 79 Third motor 80 Molding die 81 Upper mold 82 Lower mold 83 Leg part 84 Lower mold body 85 Mounting base 88 Leg part 89 Base part a1 1st axis | shaft a2 2nd axis | shaft a3 3rd axis | shaft L1, 2, L3 spacing R2 rotation region OJ object to be heated

Claims

A heating chamber;
A microwave supply unit for supplying microwaves to the heating chamber;
A first stirring unit for stirring the microwave supplied to the heating chamber in a predetermined direction;
A microwave device comprising: a second stirring unit that stirs the microwave in a direction different from the predetermined direction.
The heating chamber has a supply port for supplying the microwave from the microwave supply unit,
The microwave device according to claim 1, wherein the first stirring unit is provided in the supply port.
The first stirring unit has a first stirring blade provided in the heating chamber, and the microwave is stirred in the predetermined direction by rotating the first stirring blade around a first axis. And
The second stirring unit has a second stirring blade provided in the heating chamber, and rotates the second stirring blade around a second axis that intersects the first axis, thereby the microwave. The microwave device according to claim 1, wherein the microwave is stirred in a direction different from the predetermined direction.
The microwave device according to claim 3, wherein the second stirring blade is provided closer to an object to be heated disposed in the heating chamber than the first stirring blade.
When viewed from the axial direction of the second axis,
The second stirring blade is rotated about the second axis so that a rotation region formed by rotating the second stirring blade overlaps the object to be heated disposed in the heating chamber. The microwave device according to claim 4.
When viewed from the axial direction of the second axis,
The microwave device according to claim 5, wherein the second stirring blade is rotated about the second axis so that the rotation region includes all of the objects to be heated and overlaps.
When viewed from the axial direction of the second axis,
The microwave device according to any one of claims 3 to 6, wherein the second stirring blade is rotationally asymmetric.
The second stirring unit further includes:
A support member for supporting the second stirring blade in the heating chamber;
A drive unit provided outside the heating chamber and rotating around the second axis while attracting the support member with a magnetic force;
The microwave device according to any one of claims 3 to 7, wherein the second stirring blade is rotated in accordance with rotation of the support member by driving of the driving unit.
The microwave device according to any one of claims 3 to 8, wherein a rotation cycle of the second stirring blade is different from a rotation cycle of the first stirring blade.
Further, the heating chamber has a molding die for molding an object to be heated.
The molding die has an upper die and a lower die,
The lower mold includes a lower mold main body and a lower mold leg connected to the lower mold main body,
The microwave device according to any one of claims 3 to 9, wherein the second stirring blade is disposed below the lower mold main body so as not to interfere with the lower mold leg.
Furthermore, a mounting table for mounting an object to be heated is provided in the heating chamber,
The mounting table includes a pedestal portion and a mounting pedestal leg portion connected to the pedestal portion,
The microwave device according to any one of claims 3 to 10, wherein the second stirring blade is disposed below the pedestal portion so as not to interfere with the mounting table leg portion.
The microwave device according to any one of claims 3 to 11, wherein the second axis is orthogonal to the first axis.
And a third stirring unit that stirs the microwave in a direction different from both the direction in which the first stirring unit stirs and the direction in which the second stirring unit stirs.
The third stirring unit has a third stirring blade provided in the heating chamber, and the third stirring blade is rotated around a third axis, whereby the microwave is sent to the first stirring unit. Stirring in a direction different from both the direction of stirring and the direction of stirring of the second stirring unit,
The microwave device according to any one of claims 3 to 12, wherein the third axis is orthogonal to at least one of the first axis or the second axis.
A third stirring unit that stirs the microwave in a direction different from both the direction in which the first stirring unit stirs and the direction in which the second stirring unit stirs. 2. The microwave device according to item 1.