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公开(公告)号：US10912165B2
公开(公告)日：2021-02-02
申请号：US16081038
申请日：2017-03-23
Inventor： Koji Yoshino , Masafumi Sadahira , Masayuki Kubo
Abstract: The present invention has a configuration of controlling a motor so as to stop a radiation antenna when the radiation antenna faces in a direction in which a reflected wave detection amount is minimized and to stop the radiation antenna when the radiation antenna faces in a different direction different from the direction in which the reflected wave detection amount is minimized. According to this configuration, first, the radiation antenna stops when facing in the direction in which the reflected wave detection amount is minimized. This extends a heating time under the most efficient condition, improving a heating efficiency in comparison with when the radiation antenna constantly rotates. Second, the radiation antenna stops when facing in the different directions. This causes uneven heating when the radiation antenna faces in the direction in which the reflected wave detection amount is minimized as well as when the radiation antenna faces in the different directions. As a result, the uneven heating is cancelled out by the uneven heating each other caused at different locations. In this way, it is possible to achieve the even heating.
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公开(公告)号：US20150244055A1
公开(公告)日：2015-08-27
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.
Abstract translation: 根据本发明的定向耦合器包括在波导的壁表面中的开口和在波导的外侧上的耦合线。 该开口构造成在平面图中不与波导的管轴交叉，并且发射圆偏振波。 耦合线包括布置在两端的第一和第二传输线和输出部分，第一和第二传输线在平面图中横过开口延伸穿过管轴线并跨过开口的中心彼此相对。 第一和第二传输线在与开口垂直上方的区域偏移的位置互连。
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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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Patent Agency Ranking
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：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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公开(公告)号：US20150136758A1
公开(公告)日：2015-05-21
申请号：US14400493
申请日：2013-04-26
Inventor： Koji Yoshino , Masafumi Sadahira , Daisuke Hosokawa , Tomotaka Nobue , Yoshiharu Omori
Abstract: In order to radiate microwaves from a waveguide tube to a whole area from end to end of a radiation area within a heating chamber, and to heat uniformly an object to be heated without using a driving mechanism, a microwave heating device of the present invention includes openings for radiating the microwave from the waveguide tube to the inside of the heating chamber. The heating chamber includes a radiation area which has a length of approximate twice an in-tube wavelength in a propagation direction of the waveguide tube. Also, the openings are arranged to have an interval of approximate the in-tube wavelength in the propagation direction of the waveguide tube, and are symmetrically arranged to a center line which intersects perpendicularly to the propagation direction in the radiation area.
Abstract translation: 为了将波导管中的微波辐射到加热室内的辐射区域的端部到端部的整个区域，并且在不使用驱动机构的情况下均匀地加热被加热物体，本发明的微波加热装置包括 用于将波导管中的微波辐射到加热室内部的开口。 加热室包括在波导管的传播方向上具有大约两倍于管内波长的长度的辐射区域。 此外，开口被布置成在波导管的传播方向上具有近似管内波长的间隔，并且对准地布置成与辐射区域中的传播方向垂直相交的中心线。
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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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