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公开(公告)号：US11937360B2
公开(公告)日：2024-03-19
申请号：US17251941
申请日：2019-08-01
Inventor： Takashi Uno , Daisuke Hosokawa , Fumitaka Ogasawara , Mikio Fukui , Koji Yoshino , Yoshiharu Oomori
Abstract: A high frequency heating apparatus (1A) includes the following components: a first electrode (11) that is flat; a plurality of flat second electrodes (12) that are flat; a high-frequency power supply (20); a matching unit (30); a controller (40); and an electric field regulator (50). The second electrodes (12) are placed opposite to the first electrode (11). The high-frequency power supply (20) applies a high-frequency voltage to the first electrode (11). The matching unit (30) is placed between the first electrode (11) and the high-frequency power supply (20), and is impedance-matched with the high-frequency power supply (20). The controller (40) controls the high-frequency power supply (20). The electric field regulator (50) individually adjusts the electric field strengths in a plurality of regions located between first electrode (11) and the second electrodes (12). This aspect can reduce uneven heating.
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公开(公告)号：US10939512B2
公开(公告)日：2021-03-02
申请号：US16081039
申请日：2017-03-23
Inventor： Masafumi Sadahira , Koji Yoshino , Masayuki Kubo
Abstract: The present invention includes a directional coupler that detects at least part of a reflected wave inside a waveguide. When an object to be heated is absent, a reflected wave is strong, because there is nothing to absorb a microwave. When the object is present, the reflected wave is weak, because the microwave is absorbed by the object. As a quantity of the object becomes greater, a larger amount of microwave is absorbed by the object, and thus the reflected wave is weakened. It is thus possible to determine the quantity of the object from a reflected wave detection amount detected by the directional coupler without using a detector that detects a load.
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公开(公告)号：US10135107B2
公开(公告)日：2018-11-20
申请号：US14425242
申请日：2014-01-31
Inventor： Koji Yoshino , Tomotaka Nobue , Kenji Yasui , Yoshiharu Omori , Masafumi Sadahira , Masayuki Kubo
Abstract: A directional coupler according to the invention includes an opening in a wall surface of a waveguide, and a coupling line on an outer side of the waveguide. The opening is configured to not cross a tube axis of the waveguide in plan view, and to emit a circularly polarized wave. The coupling line includes first and second transmission lines and output parts disposed at both ends, the first and second transmission lines extending across the opening to cross the tube axis in plan view and being opposed to each other across the center of the opening. The first and second transmission lines are interconnected at a position displaced from an area vertically above the opening.
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公开(公告)号：US12207376B2
公开(公告)日：2025-01-21
申请号：US17294411
申请日：2019-10-25
Inventor： Daisuke Hosokawa , Takashi Uno , Fumitaka Ogasawara , Koji Yoshino
Abstract: A high-frequency heating apparatus according to an embodiment of the present disclosure includes a heating chamber, an electrode, a high-frequency power supply, at least one matching element, and a controller. The heating chamber accommodates a heating target. The high-frequency power supply applies a high-frequency voltage to the electrode. The impedance matcher includes at least one matching element having a matching constant that is variable. The controller stops the high-frequency power supply to complete heating based on a temporal change of the matching constant of the at least one matching element. In this embodiment, a heating target can be heated efficiently.
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公开(公告)号：US12048082B2
公开(公告)日：2024-07-23
申请号：US17290724
申请日：2019-11-20
Inventor： Takashi Uno , Mikio Fukui , Koji Yoshino , Daisuke Hosokawa
Abstract: A high frequency heating apparatus of the present disclosure includes a first electrode (11), a second electrode (12), a high frequency power supply, a position adjuster (20), and a controller. The second electrode (12) is disposed facing the first electrode (11). The high frequency power supply supplies high frequency power to the first electrode (11) or the second electrode (12). The position adjuster (20) adjusts the position of the first electrode (11). The controller controls the position adjuster (20). The position adjuster (20) includes a weight (21), one or more connecting lines (22), one or more pulleys (23), and one or more drive units (24). The one or more connecting lines (22) connect the weight (21) and the first electrode (11). The one or more pulleys (23) support the one or more connecting lines (22). The one or more drive units (24) are attached to the one or more pulleys (23) and drive the one or more pulleys (23). In this embodiment, a heating target can be heated efficiently.
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Patent Agency Ranking
公开(公告)号：US10356855B2
公开(公告)日：2019-07-16
申请号：US14785224
申请日：2014-04-18
Inventor： Masayuki Kubo , Koji Yoshino , Masafumi Sadahira , Daisuke Hosokawa , Yoshiharu Omori , Keijirou Kunimoto
Abstract: A microwave heating apparatus includes: a heating chamber which houses a heating object; a microwave generating unit which generates a microwave; a transmitting unit which transmits the microwave generated by the microwave generating unit; a waveguide-structure antenna which radiates to the heating chamber the microwave transmitted from the transmitting unit; and a rotation driving unit which drives the waveguide-structure antenna to rotate, wherein the waveguide-structure antenna has a microwave sucking-out opening in a wall surface forming a waveguide structure of the waveguide-structure antenna.
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公开(公告)号：US20150288342A1
公开(公告)日：2015-10-08
申请号：US14426034
申请日：2013-12-06
Inventor： Yoshiharu Omori , Tomotaka Nobue , Hiroshi Kawai , Koji Yoshino , Keijirou Kunimoto
CPC classification number: H03H7/38 , H05B6/6408 , H05B6/6494 , H05B6/662 , H05B6/664 , H05B6/70 , H05B6/702
Abstract: A microwave processing device includes: a periodic structure body which forms a surface-wave transmission line to transmit surface waves of microwaves; an oscillator which generates microwave power; and a transmitting part which transmits the microwave power generated by the oscillator to the periodic structure body, wherein a matching part is provided at a connecting portion between the periodic structure body and the transmitting part, and an impedance of the matching part is set to a value between an impedance of the periodic structure body and an impedance of the transmitting part.
Abstract translation: 微波处理装置包括：形成表面波传输线以传输微波表面波的周期性结构体; 产生微波功率的振荡器; 以及发送部，其将由所述振荡器产生的微波功率发送到所述周期性结构体，其中，在所述周期性结构体和所述发送部之间的连接部设置有匹配部，并且将所述匹配部的阻抗设定为 周期性结构体的阻抗与发送部的阻抗之间的值。
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公开(公告)号：US11153943B2
公开(公告)日：2021-10-19
申请号：US15300719
申请日：2015-07-09
Inventor： Masafumi Sadahira , Koji Yoshino , Masayuki Kubo , Yoshiharu Omori
Abstract: A rotating antenna (105a) includes: a ceiling surface (109) and a side-wall surface (110) that constitute a waveguide structure (108); and a horn (113) that radiates a microwave into a heating chamber. The rotating antenna (105a) further includes a flange (112) that is formed on a periphery of the side-wall surface (110) so as to face a bottom surface (111), which is an inner wall surface of the heating chamber, and so as to surround the side-wall surface (110). The flange (112) has choke sections (117) that reduce a leakage of the microwave. This configuration can generate a relatively low impedance region so as to surround the side-wall surface (110), thereby enhancing a leakage reducing performance of the rotating antenna (105a) and increasing directivity of the microwave radiated from the rotating antenna (105a). Consequently, if a part of substances to be heated arranged on a plate is a food that a user does not want to warm, the rotating antenna (105a) selectively heats an area in which a food that the user wants to warm is present but hardly heats the food that the user does not want to warm.
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公开(公告)号：US10470258B2
公开(公告)日：2019-11-05
申请号：US15537216
申请日：2016-07-27
Inventor： Toshiyuki Okajima , Yoshiharu Oomori , Koji Yoshino
Abstract: High frequency heating device is provided with heater disposed adjacent to mount base on which object to be heated is mounted and having a plurality of surface wave transmission lines electrically isolated from each other, and first and second high frequency power generators, each of which generates high frequency power having different frequency. Surface wave transmission lines receive at least one of the high frequency power generated by first high frequency power generator and the high frequency power generated by second high frequency power generator. According to this aspect, interference between the high frequency powers is not occurred and electromagnetic field coupling is not occurred. As a result, in the high frequency heating device provided with the surface wave transmission line using a periodic structure, uneven baking caused by the electromagnetic field coupling can be suppressed, and a heating state of an object to be heated can be easily controlled.
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公开(公告)号：US10362641B2
公开(公告)日：2019-07-23
申请号：US15117688
申请日：2015-03-11
Inventor： Yoshiharu Omori , Koji Yoshino , Masaharu Tsujimoto , Takahide Yamaguchi , Junji Hirata , Takayuki Akashi , Masafumi Sadahira , Masayuki Kubo
Abstract: A microwave oven includes a waveguide having an E-bend structure with multiple openings disposed on a lateral face of a heating chamber that allow the waveguide to communicate with the heating chamber. The waveguide has a first section for propagating a microwave from a magnetron toward the heating chamber, and a second section having a wide plane that abuts an outer wall of the heating chamber. The openings include at least one circularly-polarized-wave opening for generating a circularly polarized wave. A cross section of the first section orthogonally intersects a tube axis of the first section projects virtually along the tube axis of first section and onto a lateral face of the heating chamber, and the circularly-polarized-wave opening is configured such that its center is located outside the resultant projected region.
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