WO2018037802A1 - 高周波加熱装置 - Google Patents

高周波加熱装置 Download PDF

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Publication number
WO2018037802A1
WO2018037802A1 PCT/JP2017/026620 JP2017026620W WO2018037802A1 WO 2018037802 A1 WO2018037802 A1 WO 2018037802A1 JP 2017026620 W JP2017026620 W JP 2017026620W WO 2018037802 A1 WO2018037802 A1 WO 2018037802A1
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WO
WIPO (PCT)
Prior art keywords
surface wave
microwave
frequency heating
unit
heating device
Prior art date
Application number
PCT/JP2017/026620
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English (en)
French (fr)
Japanese (ja)
Inventor
岡島　利幸
大森　義治
吉野　浩二
貴紀 廣部
上島　博幸
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2018535538A priority Critical patent/JP6967707B2/ja
Priority to CN201780029140.3A priority patent/CN109076656B/zh
Priority to EP17843288.6A priority patent/EP3503681B1/en
Publication of WO2018037802A1 publication Critical patent/WO2018037802A1/ja

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H05B6/707—Feed lines using waveguides

Definitions

  • This disclosure relates to a high-frequency heating device such as a microwave oven.
  • Patent Document 1 discloses a high-frequency heating device that thaws frozen sushi placed on a surface wave transmission line by supplying microwaves directly to the surface wave transmission line.
  • An object of this indication is to provide the high frequency heating apparatus which contributes to the solution of the said subject.
  • High-frequency heating device includes a generator and the surface wave excitation member and the reusable portion first coupling portion.
  • the generation unit generates microwaves.
  • the surface wave exciter has a periodic structure and heats the object to be heated by propagating microwaves in the surface wave mode.
  • the first coupling portion is provided at one end of the surface wave exciter. Via a first coupling part, the microwave generated by the generator is supplied to the surface wave excitation body.
  • the reusable part uses surface wave mode microwaves that reach the other end of the surface wave exciter located in the direction of microwave propagation from one end of the surface wave exciter to heat the object to be heated. To reuse.
  • the microwave that has not been absorbed by the heating object can be reused for heating the heating object.
  • utilization efficiency of microwave energy can be improved.
  • FIG. 1 is a longitudinal sectional view schematically showing the configuration of the high-frequency heating device according to Embodiment 1.
  • FIG. Figure 2 is a cross-sectional view schematically showing a configuration of a high-frequency heating apparatus according to the first embodiment.
  • Figure 3 is a cross-sectional view schematically showing a configuration of a high-frequency heating apparatus according to the second embodiment.
  • Figure 4 is a cross-sectional view schematically showing a configuration of a high-frequency heating apparatus according to the third embodiment.
  • FIG. 5 is a perspective view showing a configuration of a surface acoustic wave excitation body according to the third embodiment.
  • FIG. 6 is a perspective view showing a configuration of a surface acoustic wave excitation body according to the third embodiment.
  • Figure 7 is a cross-sectional view schematically showing a configuration of a high-frequency heating apparatus according to the fourth embodiment.
  • the high-frequency heating device includes the generation unit, the surface wave exciter, the first coupling unit, and the reuse unit.
  • the generator is configured to generate microwaves.
  • the surface wave exciter has a periodic structure, and is configured to heat the object to be heated by propagating microwaves in a surface wave mode.
  • the first coupling portion is provided at one end of the surface wave exciter. Via a first coupling part, the microwave generated by the generator is supplied to the surface wave excitation body.
  • the reusable part uses surface wave mode microwaves that reach the other end of the surface wave exciter located in the direction of microwave propagation from one end of the surface wave exciter to heat the object to be heated. Configured to be reused.
  • the reuse unit is provided at another end of the surface wave exciter and reaches another end of the surface wave exciter. And a reflection part configured to reflect the microwave.
  • the reflection portion is a waveguide that covers another end of the surface wave excitation body.
  • the reuse unit is provided at another end of the surface wave exciter, and the surface wave mode reaches the other end.
  • a matching unit configured to mode-convert the microwave by impedance matching is included.
  • the high-frequency heating device further includes a power storage unit that stores DC power in addition to the fourth aspect.
  • the reuse unit further includes a conversion unit configured to convert the microwave mode-converted by the matching unit into DC power and supply the DC power to the power storage unit.
  • the reuse part includes a second coupling part, a matching part, and a second part provided at any end part of the surface wave exciter. And a microwave transmission line connecting the two coupling portions.
  • the surface wave exciter is configured to propagate the surface wave obtained from the microwave supplied through the first coupling unit.
  • a second portion connected to the first portion and configured to change a propagation direction of the surface wave; and a third portion connected to the second portion and configured to propagate the surface wave in the changed propagation direction.
  • the reuse unit is the second part and the third part.
  • the periodic structure has a plurality of columnar pins periodically arranged in the horizontal direction.
  • the high-frequency heating device of the present disclosure is specifically a microwave oven.
  • the high-frequency heating device of the present disclosure is not limited to this, and includes a heating device using dielectric heating, a garbage disposal machine, a semiconductor manufacturing device, and the like.
  • the high-frequency heating device 1 a includes a heating chamber 2, a generation unit 8, a surface wave exciter 10, a coupling unit 12, a reflection unit 14, and a control unit 16.
  • the high-frequency heating device 1a is configured to heat the heating object 6 placed on the placing table 4 by microwaves that propagate the surface of the surface wave exciter 10 in the surface wave mode.
  • FIG. 2 schematically shows a state in which the microwave in the surface wave mode propagates through the surface wave exciter 10 and the placement position of the heating object 6 on the placement table 4 (not shown in FIG. 2). ing.
  • the generation unit 8 includes a magnetron and an inverter, and is configured to generate a microwave under the control of the control unit 16.
  • the solid state oscillator and the power amplifier may constitute the generation unit 8.
  • the surface wave exciter 10 is provided below the mounting table 4.
  • the surface wave exciter 10 propagates microwaves in the surface wave mode, and heats the heating object 6 placed on the placing table 4.
  • the surface wave exciter 10 is a stub type surface wave exciter that is a metal periodic structure.
  • the surface wave exciter 10 includes a plurality of metal plates 11 arranged on the metal plate 13 at predetermined intervals.
  • the surface wave exciter 10 is not a stub type surface wave exciter, but may be an interdigital type surface wave exciter obtained by punching a metal plate into a crossed finger shape.
  • the surface wave exciter 10 may be formed of a dielectric plate such as an alumina plate or a bakelite plate instead of the metal periodic structure.
  • the excitation frequency of the surface wave exciter 10 depends on the material and dimensions. In the case of a stub type surface wave exciter, the excitation frequency can be set to a desired value by appropriately selecting the height, interval, etc. of the metal plate 11. Generally, the excitation frequency of the surface wave exciter 10 is higher as the height of the metal plate 11 is lower and is higher as the interval between the metal plates 11 is narrower.
  • the metal plates 11 are arranged in parallel to each other.
  • the surface wave exciter 10 propagates a surface wave in a direction perpendicular to the metal plate 11, that is, in the arrangement direction of the metal plates 11.
  • the propagation direction of the microwave propagating in the surface wave mode on the surface wave exciter 10 coincides with the arrangement direction of the metal plates 11.
  • the coupling portion 12 is provided on the feeding side 15 which is one end portion of the surface wave excitation body 10 (the left end of the surface wave excitation body 10 in FIGS. 1 and 2).
  • the microwave generated by the generation unit 8 is supplied from the power supply side 15 to the surface wave exciter 10 via the coupling unit 12.
  • the coupling portion 12 is a rectangular waveguide.
  • the coupling part 12 corresponds to a first coupling part.
  • a reflective portion 14 is provided so as to cover the end side 17.
  • the terminal side 17 is another end of the surface wave excitation body 10 located in the propagation direction D1 from the power supply side 15 (the right end of the surface wave excitation body 10 in FIGS. 1 and 2).
  • the reflection portion 14 totally reflects the surface wave mode microwave propagated through the surface of the surface wave exciter 10 at the end edge 17.
  • the reflecting portion 14 is a rectangular waveguide.
  • the microwave generated by the generation unit 8 is supplied from the feeding side 15 to the surface wave exciter 10 via the coupling unit 12.
  • the surface wave S1 propagating on the surface of the surface wave exciter 10 is generated by the supply of the microwave.
  • the surface wave S1 propagates in the propagation direction D1 (the direction from left to right in the figure), and heats the heating target 6 from below.
  • the surface wave S2 which is a part of the surface wave S1 is not absorbed by the heating object 6, but further propagates in the propagation direction D1 on the surface of the surface wave exciter 10, and the end edge 17 of the surface wave exciter 10 is obtained.
  • a surface wave S2 is reflected at the end edges 17, to reverse the propagation direction of the surface wave S2.
  • the propagation direction of the surface wave S2 is changed from the propagation direction D1 to the propagation direction D2 (the direction from right to left in the figure).
  • the surface wave S2 reflected by the reflector 14 propagates on the surface of the surface wave exciter 10 from the terminal side 17 toward the power supply side 15 and heats the heating object 6 from below.
  • the conventional high-frequency heating apparatus radiates surface wave mode microwaves that reach the end of the surface wave exciter without being absorbed by the heating object 6 into the space. Since the microwave radiated into the space does not contribute to the heating of the heating object 6, the utilization efficiency of the microwave energy decreases.
  • the heating object 6 is heated not only by the surface wave S1 but also by the surface wave S2 reflected by the reflecting portion 14.
  • the high-frequency heating device 1a can reuse the microwave that has not been absorbed by the object to be heated for heating the object to be heated. As a result, utilization efficiency of microwave energy can be improved.
  • the reflection unit 14 corresponds to a reuse unit configured to reuse microwaves that have not been absorbed by the heating object 6 and have reached the terminal side of the surface wave exciter.
  • FIG. 3 is a cross-sectional view schematically showing the configuration of the high-frequency heating device 1b.
  • FIG. 3 schematically shows a state in which the microwave in the surface wave mode propagates through the surface wave exciter 10 and the placement position of the heating object 6 on the placement table 4 (not shown in FIG. 3). .
  • the microwave is reused by reflecting the surface wave S2 that has reached the terminal side 17 of the surface wave exciter 10.
  • the microwave is reused by converting the microwave of the surface wave mode into the microwave of another mode by impedance matching.
  • the high-frequency heating apparatus 1b instead of the reflection portion 14, and a consistent portion 22 and the converter 24.
  • the matching unit 22 and the conversion unit 24 correspond to a reuse unit.
  • the high-frequency heating device 1 b further includes a power storage unit 26.
  • the matching unit 22 is connected to the end side 17 of the surface wave exciter 10.
  • the conversion unit 24 is connected to the matching unit 22 through the microwave transmission line 23 and is connected to the power storage unit 26 through the DC power transmission line 25.
  • the power storage unit 26 is connected to the generation unit 8 and supplies power to the generation unit 8.
  • the matching unit 22 is an impedance matching unit configured to perform impedance matching on the microwave.
  • the impedance matching can convert the microwave surface wave mode to a microwave coaxial mode microwave or waveguide modes. Hereinafter, this is referred to as mode conversion by impedance matching.
  • the matching unit 22 When converting the microwave of the surface wave mode into the waveguide mode, the matching unit 22 may have a stepped stub structure. When the surface wave mode microwave is converted into the coaxial mode microwave, the matching unit 22 converts the surface wave mode microwave into the waveguide mode microwave, and then into the coaxial mode microwave. You may have the structure of 2 steps
  • the matching unit 22 is not limited to these, and can have various configurations.
  • the microwave transmission line 23 can be configured by a coaxial line or a waveguide, for example.
  • the matching unit 22 converts the microwave of the surface wave mode into the coaxial mode or the waveguide mode. Therefore, it is possible to transmit through the microwave transmission line 23, the microwaves to the converter 24 is a separate component.
  • the conversion unit 24 is a member that converts microwaves that are AC power into DC power.
  • a rectenna Rectifying antenna
  • the heating object 6 is heated by the surface wave S ⁇ b> 1 obtained from the microwave supplied through the coupling portion 12.
  • the surface wave S ⁇ b> 2 propagated through the surface wave exciter 10 without being absorbed by the heating object 6 reaches the end side 17.
  • the matching unit 22 mode-converts the surface wave mode microwave (surface wave S2) that has reached the end edge 17 by impedance matching, and generates a coaxial mode or waveguide mode microwave.
  • Matching unit 22 a mode conversion microwave, and transmits to the converter 24 through the microwave transmission line 23.
  • the conversion unit 24 converts the microwave into DC power, and transmits the DC power to the power storage unit 26 via the DC power transmission line 25.
  • the power storage unit 26 stores DC power as power supplied to the generation unit 8.
  • the high-frequency heating device 1 b converts the microwave that has not been absorbed by the heating object 6 into DC power using the matching unit 22 and the conversion unit 24.
  • the DC power is stored in the power storage unit 26 and supplied to the generation unit 8 when necessary.
  • the high-frequency heating device 1b can reuse the microwave that has not been absorbed by the heating object for heating the heating object. As a result, utilization efficiency of microwave energy can be improved.
  • FIG. 4 is a cross-sectional view schematically showing the configuration of the high-frequency heating device 1c.
  • FIG. 4 schematically shows a state in which the microwave in the surface wave mode propagates through the surface wave exciter 20 and the placement position of the heating object 6 on the placement table 4 (not shown in FIG. 4). .
  • the high-frequency heating device 1 c does not include the conversion unit 24 and the power storage unit 26 but includes a coupling unit 32 instead.
  • the high-frequency heating device 1 c includes a surface wave exciter 20 instead of the surface wave exciter 10.
  • Surface wave excitation body 20 has a structure different from the structure of the surface wave excitation body 10 according to the second embodiment.
  • the coupling part 32 corresponds to a second coupling part.
  • the high-frequency heating device 1 c has a coupling portion 32 in addition to the coupling portion 12.
  • the coupling portion 32 is provided on a power feeding side 33 that is an end of the surface wave exciter 20 other than the power feeding side 15 and the terminal side 17.
  • the surface wave exciter 20 has a substantially square shape in plan view, and the coupling portion 32 is provided on the power supply side 33 orthogonal to the power supply side 15.
  • the coupling unit 32 is connected to the matching unit 22 via the microwave transmission line 31.
  • the heating object 6 is heated by the surface wave S1 obtained from the microwave supplied through the coupling portion 12.
  • the surface wave S2 which is a part of the surface wave S1 propagates through the surface wave exciter 10 without being absorbed by the heating object 6 and reaches the terminal side 17.
  • the matching unit 22 mode-converts the surface wave mode microwave (surface wave S2) that has reached the end edge 17 by impedance matching, and generates a coaxial mode or waveguide mode microwave.
  • Matching unit 22 a mode conversion microwave, and transmits to the coupling portion 32 through the microwave transmission line 31.
  • the microwave via a coupling portion 32 is supplied to the surface wave excitation body 20 from the feeding side 33. From this microwave, a surface wave S3 propagating in a propagation direction D3 perpendicular to the propagation direction D1 of the surface waves S1 and S2 is generated.
  • the heating object 6 is also heated by the surface wave S3. That is, in the present embodiment, the matching unit 22 and the coupling unit 32 correspond to a reuse unit.
  • the surface wave exciter 20 has a pin type stub structure.
  • the pin-type stub structure is a periodic structure having a plurality of columnar pins arranged periodically in the horizontal direction.
  • the surface wave exciter 20 shown in FIG. 5 has a quadrangular prism pin 20a.
  • the surface wave exciter 20 shown in FIG. 6 has a cylindrical pin 20b.
  • the surface wave can propagate along the arrangement direction of the pins, that is, in any direction parallel to the horizontal plane where the pins are arranged.
  • the high-frequency heating device 1 c supplies the microwave that has not been absorbed by the heating object 6 to the surface wave exciter 20 via the coupling portion 32. In this way, the high-frequency heating device 1c can reuse the microwave that has not been absorbed by the object to be heated for heating the object to be heated. As a result, utilization efficiency of microwave energy can be improved.
  • FIG. 7 is a cross-sectional view schematically showing the configuration of the high-frequency heating device 1d.
  • FIG. 7 schematically shows how the microwaves in the surface wave mode propagate through the surface wave exciter 30 and the placement position of the heating object 6 on the placement table 4 (not shown in FIG. 7). .
  • the high-frequency heating device 1d includes the surface wave exciter 30 that does not include the reflection unit 14 that is a reuse unit and that can reuse the microwaves that are not absorbed by the heating target 6 due to its shape.
  • the surface wave excitation body 30 has a shape curved in U-shape in plan view.
  • the surface wave exciter 30 includes a straight portion 30a, a curved portion 30b, and a straight portion 30c. Heating the object 6 is straight portion 30a, so as to extend over the 30c, is mounted on the mounting table 4 (not shown).
  • the straight portion 30a, the curved portion 30b, and the straight portion 30c correspond to a first portion, a second portion, and a third portion, respectively.
  • the straight part 30a extends linearly in plan view, and propagates the surface wave S1 obtained from the microwave supplied via the coupling part 12 in the propagation direction D1.
  • the surface wave S2 which is a part of the surface wave S1 further propagates through the straight part 30a without being absorbed by the heating object 6, and reaches the end of the straight part 30a.
  • the curved portion 30b has a fan shape with a central angle of 180 degrees in plan view, and connects the straight portion 30a and the straight portion 30c.
  • the surface wave S2 propagated from the straight portion 30a to the curved portion 30b in the propagation direction D1 propagates from the curved portion 30b to the straight portion 30c in the propagation direction D2. That is, the bending portion 30b changes the propagation direction of the surface wave S2. In the present embodiment, the propagation direction of the surface wave S2 is reversed.
  • the straight portion 30c is connected to the curved portion 30b and extends linearly in plan view.
  • the straight line portion 30c propagates the surface wave S2 whose propagation direction is reversed by the bending portion 30b in the propagation direction D2.
  • the heating object 6 is heated by the surface wave S1 obtained by the microwave supplied through the coupling portion 12 propagating through the straight portion 30a.
  • the heating object 6 is also heated by the surface wave S2 propagating through the straight portion 30c in the propagation direction reversed by the curved portion 30b.
  • the reuse unit is not configured by separate members such as the reflection unit 14 and the matching unit 22 as in the first and second embodiments.
  • Curved portion 30b and the straight portion 30c contained in the surface wave excitation body 30 functions as a reusable part.
  • the high-frequency heating device 1 d uses the microwave that has not been absorbed by the heating object 6 again for heating the heating object 6. In this way, the high-frequency heating device 1d can reuse the microwave that has not been absorbed by the heating object for heating the heating object. As a result, utilization efficiency of microwave energy can be improved.
  • the reflecting portion 14 is provided so as to cover the terminal side 17 of the surface wave exciter 10.
  • the reflection unit 14 may cover the entire surface wave exciter 10.
  • the metal plates 11 included in the surface wave exciter 10 all have the same height.
  • the metal plate 11 covered with the reflecting portion 14 may have a height that gradually decreases as the end plate 17 approaches. With this configuration, the surface wave can be reflected with higher accuracy.
  • Embodiment 2 a rectenna is given as an example of the conversion unit 24. However, if it is possible to convert the microwave into DC power, but is not limited thereto.
  • the coupling portion 32 is provided on the feeding side 33 which is the end of the surface wave excitation body 20 other than the feeding side 15 and the termination side 17.
  • the feeding side 33 may be provided on the feeding side 15 or the terminal side 17.
  • the surface-wave exciter 20 according to the third embodiment has a pin-type stub structure.
  • the surface acoustic wave excitation body 10 according to the first and second embodiments and the surface acoustic wave excitation body 30 according to the fourth embodiment may have a pin-type stub structure.
  • the surface wave exciter 30 has a U-shape.
  • the shape of the surface wave excitation body 30 is not limited to this as long as the propagation direction of the surface wave S2 propagated through the surface wave excitation body 30 is changed.
  • the present disclosure can be applied to a microwave oven, a drying apparatus, a ceramic heating apparatus, a garbage disposal machine, a semiconductor manufacturing apparatus, and the like.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
PCT/JP2017/026620 2016-08-22 2017-07-24 高周波加熱装置 WO2018037802A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2018535538A JP6967707B2 (ja) 2016-08-22 2017-07-24 高周波加熱装置
CN201780029140.3A CN109076656B (zh) 2016-08-22 2017-07-24 高频加热装置
EP17843288.6A EP3503681B1 (en) 2016-08-22 2017-07-24 High-frequency heating device

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JP2016-162145 2016-08-22
JP2016162145 2016-08-22

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JP (1) JP6967707B2 (zh)
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP3780909A4 (en) * 2018-04-06 2021-05-05 Panasonic Intellectual Property Management Co., Ltd. HIGH FREQUENCY HEATING DEVICE
WO2023189941A1 (ja) * 2022-03-30 2023-10-05 パナソニックＩｐマネジメント株式会社 高周波加熱装置

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Publication number Priority date Publication date Assignee Title
CN114040533B (zh) * 2021-11-19 2022-11-22 北京航空航天大学 一种喇叭激励介质表面波均匀加热装置

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JP2007192518A (ja) * 2006-01-23 2007-08-02 Matsushita Electric Ind Co Ltd 高周波加熱装置
WO2009050893A1 (ja) * 2007-10-18 2009-04-23 Panasonic Corporation マイクロ波加熱装置
US9585203B2 (en) * 2011-08-04 2017-02-28 Panasonic Intellectual Property Management Co., Ltd. Microwave heating device
JP6288461B2 (ja) * 2012-12-07 2018-03-07 パナソニックＩｐマネジメント株式会社 マイクロ波処理装置
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3780909A4 (en) * 2018-04-06 2021-05-05 Panasonic Intellectual Property Management Co., Ltd. HIGH FREQUENCY HEATING DEVICE
WO2023189941A1 (ja) * 2022-03-30 2023-10-05 パナソニックＩｐマネジメント株式会社 高周波加熱装置

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EP3503681B1 (en) 2020-05-13
JPWO2018037802A1 (ja) 2019-06-20
EP3503681A1 (en) 2019-06-26
CN109076656B (zh) 2020-12-08
EP3503681A4 (en) 2019-11-20
JP6967707B2 (ja) 2021-11-17
CN109076656A (zh) 2018-12-21

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