WO2010097881A1 - マグネトロン及びマイクロ波利用機器 - Google Patents

マグネトロン及びマイクロ波利用機器 Download PDF

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Publication number
WO2010097881A1
WO2010097881A1 PCT/JP2009/007216 JP2009007216W WO2010097881A1 WO 2010097881 A1 WO2010097881 A1 WO 2010097881A1 JP 2009007216 W JP2009007216 W JP 2009007216W WO 2010097881 A1 WO2010097881 A1 WO 2010097881A1
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WO
WIPO (PCT)
Prior art keywords
anode cylinder
magnetron
magnetic pole
anode
cylinder
Prior art date
Application number
PCT/JP2009/007216
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
半田貴典
桑原なぎさ
齋藤悦扶
石井健
Original Assignee
パナソニック株式会社
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.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2011501367A priority Critical patent/JPWO2010097881A1/ja
Priority to CN200980157579XA priority patent/CN102334173A/zh
Publication of WO2010097881A1 publication Critical patent/WO2010097881A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
    • H01J25/587—Multi-cavity magnetrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/12—Vessels; Containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/18—Resonators

Definitions

  • the present invention relates to a magnetron and a device using microwaves.
  • a magnetron device used for microwave heating equipment such as a microwave oven is configured as shown in FIG.
  • FIG. 3 is a partially broken view of a magnetron and a view showing an anode cylinder, an annular magnet, a cooling fin, etc. in a magnetic yoke in a conventional example.
  • FIG. 4 is an enlarged view of a portion B of the magnetron 80 shown in FIG.
  • the magnetron 80 is inserted into the magnetic yoke 90, the anode cylinder 81, the output-side magnetic pole 82 inserted into the upper end opening of the anode cylinder 81, and the lower end opening of the anode cylinder 81.
  • the input side magnetic pole 83, the output side magnetic pole 82 and the output side tube 84 hermetically coupled to the upper end opening of the anode cylinder 81, and the input side magnetic pole 83 and the lower end opening of the anode cylinder 81 are hermetically coupled.
  • An annular magnet 88 disposed on the lower surface of the magnetic yoke 90 so as to be inserted directly into the input side tube 85, and a magnet ring 92A positioned between the annular magnet 87 and the output side tube 84, , A magnet ring located between the annular magnet 88 and the input side tube 85 2B, comprises a capital.
  • a plurality of cooling fins 86 are fitted on the outer peripheral surface of the anode cylinder 81.
  • a plurality of vanes 91 are arranged radially on the inner peripheral surface of the anode cylinder 81. (In FIG. 3, only one vane 91 is shown).
  • a cathode assembly 89 is disposed at the center of the anode cylinder 81. In the space surrounded by the cathode structure 89 and the vane 91, an action space described later is formed.
  • thin portions 81A and 81B having a thickness of the anode cylinder 11 thinner than other portions are formed.
  • the thin portions 81 ⁇ / b> A and 81 ⁇ / b> B make it difficult for heat to escape when one end of the output side tube 84 and the upper surface of the anode cylinder 81 are hermetically coupled when the magnetron 80 is assembled. Therefore, one end of the output side tube 84 is joined to the upper surface of the anode cylinder 81 that is easily melted by heat.
  • the magnetic yoke 90 forms a magnetic path that generates a static magnetic field in the working space together with the pair of magnetic poles 82 and 83 and the pair of annular magnets 87 and 88.
  • the output side magnetic pole 82 and the input side magnetic pole 83 are formed in a funnel shape by drawing a magnetic plate material having a small magnetic resistance such as iron.
  • FIG. 4 is an enlarged view of a portion B of the magnetron 80 shown in FIG.
  • one end of the output side tube 84 is bent downward in the axial direction of the anode cylinder 81.
  • the front end of the output side tube 84 bent downward is in contact with the anode cylinder 81 and the output side magnetic pole 82.
  • the lower surface of the distal end of the output side tube 84 is hermetically coupled to the upper surface of the anode cylinder 81, and the inner peripheral surface of the distal end of the output side tube 84 is in contact with one end of the output side magnetic pole 82.
  • the predetermined distance h 81 is a dimension on the end side in the thin portion 81A of the anode cylinder 81.
  • the output side magnetic pole 82 is inserted into one end of the anode cylinder 81.
  • the length h 82 in the axial direction of the anode cylinder 81 is such that the thin portion 81 ⁇ / b> A is located from the upper surface of the anode cylinder 81. shorter than the predetermined distance h 81.
  • a surface 82A where one end of the output-side magnetic pole 82 is in contact with the inner peripheral surface of the anode cylinder 81 is shorter than the dimension h 81 on the end side in the thin portion 81A of the anode cylinder 11 in the axial direction of the anode cylinder 81 . It contacts the inner peripheral surface of the anode cylinder 81.
  • FIG. 4 the thin portion 81A on the output side magnetic pole 82 side of the thin portions 81A and 81B of the anode cylinder 81 has been described. However, the thin portion 81B on the input side magnetic pole 83 side has the same configuration. Yes.
  • the thin portion 81A of the anode cylinder 81 is weaker in the central axis direction of the anode cylinder 81 than the other portions. Therefore, when the magnetron 80 is assembled, particularly when the cooling fin 86 is fitted to the anode cylinder 81, the central portion of the anode cylinder 81 is deformed in the direction of the central axis of the anode cylinder 81, and the oscillation characteristics of the magnetron 80 itself. Is damaged.
  • the inner diameter of the end of the anode cylinder is made smaller than the inner diameter of the center, thereby preventing deformation of the end of the anode cylinder.
  • the material cost increases because the ring is brazed or formed by casting.
  • An object of the present invention is to provide a magnetron and a microwave utilization device that prevent deformation of an anode cylinder.
  • the present invention includes an anode cylinder formed in a cylindrical shape having both ends open and a plurality of vanes radially disposed on an inner wall surface, and an axis of the anode cylinder positioned at the both ends opening of the anode cylinder.
  • a magnetron comprising: a pair of magnetic poles for forming a static magnetic field in a direction; and a side tube that is positioned outside the pair of magnetic poles and hermetically seals the anode cylinder, In the axial direction, is the length of the part where the magnetic pole is in contact with the inner peripheral surface of the anode cylinder, the same as the length from the end of the anode cylinder to the part where the thin part of the anode cylinder is formed? Or provide a long magnetron.
  • the present invention provides a microwave utilizing device including the magnetron.
  • the deformation of the anode cylinder can be prevented.
  • FIG. 1 is a partially cutaway view of a magnetron according to an embodiment of the present invention, and a view showing an anode cylinder, an annular magnet, a cooling fin, etc. in a magnetic yoke.
  • FIG. 2 is an enlarged view of a portion A of the magnetron 1 shown in FIG.
  • the magnetron 1 of the present embodiment includes a magnetic yoke 10, an anode cylinder 11, an output-side magnetic pole 12 inserted in the upper end opening of the anode cylinder 11, and a lower end opening of the anode cylinder 11.
  • the magnet ring 22A is positioned between the annular magnet 18 and the input side tube 15. It includes a magnet ring 22B, the.
  • a plurality of cooling fins 16 are fitted on the outer peripheral surface of the anode cylinder 11.
  • a plurality of vanes 21 are arranged radially on the inner peripheral surface of the anode cylinder 11. (In FIG. 1, only one vane 21 is shown).
  • a cathode structure 19 is disposed at the center of the anode cylinder 11. In the space surrounded by the cathode structure 19 and the vane 21, an action space 20 described later is formed.
  • Thin portions 11A and 11B in which the thickness of the anode cylinder 11 is thinner than other parts are formed at both ends of the outer peripheral surface of the anode cylinder 11.
  • the thin portion 11 ⁇ / b> A makes it difficult for heat applied when the one end of the output side tube 14 and the upper surface of the anode cylinder 11 are hermetically coupled to each other when the magnetron 1 is assembled. Therefore, one end of the side tube 14 on the output side is joined to the upper surface of the anode cylinder 11 that is easily melted by heat.
  • the magnetic yoke 10 forms a magnetic path that generates a static magnetic field in the working space 20 together with the pair of magnetic poles 12 and 13 and the pair of annular magnets 17 and 18.
  • the output side magnetic pole 12 and the input side magnetic pole 13 are formed in a funnel shape by drawing a magnetic plate material having a small magnetic resistance such as iron.
  • FIG. 2 is an enlarged view of a portion A of the magnetron 1 shown in FIG.
  • a portion A of the magnetron 1 shown in FIG. 1 includes a contact portion between the output-side magnetic pole 12 and the output-side side tube 14.
  • one end of the output side tube 14 is bent downward in the axial direction of the anode cylinder 11.
  • the distal end 14 ⁇ / b> A of the output side tube 14 bent downward is in contact with the anode cylinder 11 and the output side magnetic pole 12.
  • the lower surface of the distal end 14 ⁇ / b> A of the output side tube 14 is hermetically coupled to the upper surface of the anode cylinder 11, and the inner peripheral surface of the distal end of the output side tube 14 is in contact with one end of the output side magnetic pole 12.
  • the anode cylinder is located at a position away from the upper surface of the anode cylinder 11 by a predetermined distance h 11 in the axial direction of the anode cylinder 11 (arrow X in FIG. 2).
  • a thin portion 11A having a thickness 11 thinner than other portions is formed.
  • the predetermined distance h 11 is a dimension on the end side in the thin portion 11 A of the anode cylinder 11.
  • the output side magnetic pole 12 is inserted into one end of the anode cylinder 11.
  • the length h 12 in the axial direction of the anode cylinder 11 is a predetermined value at which the thin portion 11 ⁇ / b> A is located from the upper surface of the anode cylinder 11. It is set to be longer than the distance h 11.
  • a surface 12A where the output-side magnetic pole 12 is in contact with the inner peripheral surface of the anode cylinder 11 is longer in the axial direction of the anode cylinder 11 than the dimension h11 on the end side in the thin portion 11A of the anode cylinder 11 , and the anode cylinder It contacts the inner peripheral surface of the body 11.
  • the length h 82 in the axial direction of the anode cylinder 81 in the portion where the output-side magnetic pole 82 is in contact with the inner peripheral surface of the anode cylinder is It is set to be shorter than a predetermined distance h 81 where the thin portion 81A is located from the upper surface of the body 81. Therefore, in the conventional magnetron 80, the strength of the thin portion 81A is weak.
  • the portion where the output-side magnetic pole 12 is in contact with the inner peripheral surface of the anode cylinder 11 extends to the thin portion 11A in the axial direction of the anode cylinder 11. That is, the thin portion 11A of the anode cylinder 11 is reinforced by a portion where one end of the output-side magnetic pole 12 is in contact with the inner peripheral surface of the anode cylinder.
  • the central portion of the anode cylinder 11 is prevented from being deformed in the central axis direction of the cathode cylinder. can do. Therefore, in the magnetron 1 of the present embodiment, it is possible to prevent the oscillation characteristics of the magnetron 1 itself from being impaired.
  • the magnetron 1 according to the present embodiment can reinforce the thin portions 11A and 11B where the strength of the anode cylinder 11 is weak. Therefore, the magnetron 1 of Embodiment 1 can prevent the anode cylinder 11 from being deformed in the central axis direction even when the cooling fins 16 are fitted to the anode cylinder 11 at the time of assembly. Furthermore, the distance on the central axis of the output side magnetic pole 12 and the input side magnetic pole 13 becomes short, and the whole height on the central axis of a magnetron can also be made small.
  • the length in the axial direction of the anode cylinder 11 of the thin portion 11A and the h 13 is set even if the predetermined distance h 11 where the thin portion 11A is located from the upper surface of the anode cylinder 11 and the axial length of the anode cylinder 11 of the thin portion 11A are set larger than the sum of h 13. good.
  • a plurality of convex portions may be provided toward the inside of the anode cylinder 11 by pushing out the output-side magnetic pole 12 from the annular magnet 17 side.
  • the plurality of convex portions are in contact with the inner peripheral surface of the anode cylinder 11 by adjusting the extrusion position.
  • the length of the convex part in the axial direction of the anode cylinder 11 should just be at least to the part in which the thin part 11A is formed, but it may be longer than that.
  • the magnetron and the microwave utilization device prevent the deformation of the anode tube of the magnetron, improve the cooling efficiency, and suppress the basic characteristics and the generation variation of the harmonics, the output side magnetic pole 12 and the input side
  • the distance on the central axis of the magnetic pole 13 is reduced, and the overall height on the central axis of the magnetron can be reduced, and the effect that it can be manufactured at a low cost, and is useful as a microwave utilizing device such as a microwave oven. is there.

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PCT/JP2009/007216 2009-02-27 2009-12-24 マグネトロン及びマイクロ波利用機器 WO2010097881A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2011501367A JPWO2010097881A1 (ja) 2009-02-27 2009-12-24 マグネトロン及びマイクロ波利用機器
CN200980157579XA CN102334173A (zh) 2009-02-27 2009-12-24 磁控管以及微波利用设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009046642 2009-02-27
JP2009-046642 2009-02-27

Publications (1)

Publication Number Publication Date
WO2010097881A1 true WO2010097881A1 (ja) 2010-09-02

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ID=42665107

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Application Number Title Priority Date Filing Date
PCT/JP2009/007216 WO2010097881A1 (ja) 2009-02-27 2009-12-24 マグネトロン及びマイクロ波利用機器

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Country Link
JP (1) JPWO2010097881A1 (zh)
CN (1) CN102334173A (zh)
WO (1) WO2010097881A1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178362U (zh) * 1981-05-07 1982-11-11
JPS62115627A (ja) * 1986-04-09 1987-05-27 Hitachi Ltd マグネトロンの製造方法
JPH05275019A (ja) * 1992-03-27 1993-10-22 Sanyo Electric Co Ltd マグネトロン
JP2003036796A (ja) * 2001-07-19 2003-02-07 Matsushita Electric Ind Co Ltd マグネトロンの組立方法及びマグネトロン用陽極構体

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178362U (zh) * 1981-05-07 1982-11-11
JPS62115627A (ja) * 1986-04-09 1987-05-27 Hitachi Ltd マグネトロンの製造方法
JPH05275019A (ja) * 1992-03-27 1993-10-22 Sanyo Electric Co Ltd マグネトロン
JP2003036796A (ja) * 2001-07-19 2003-02-07 Matsushita Electric Ind Co Ltd マグネトロンの組立方法及びマグネトロン用陽極構体

Also Published As

Publication number Publication date
JPWO2010097881A1 (ja) 2012-08-30
CN102334173A (zh) 2012-01-25

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