EP2237304A3 - Magnetron for microwave oven - Google Patents

Magnetron for microwave oven Download PDF

Info

Publication number
EP2237304A3
EP2237304A3 EP10156389A EP10156389A EP2237304A3 EP 2237304 A3 EP2237304 A3 EP 2237304A3 EP 10156389 A EP10156389 A EP 10156389A EP 10156389 A EP10156389 A EP 10156389A EP 2237304 A3 EP2237304 A3 EP 2237304A3
Authority
EP
European Patent Office
Prior art keywords
pole piece
side pole
magnetron
microwave oven
annular portion
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP10156389A
Other languages
German (de)
French (fr)
Other versions
EP2237304A2 (en
EP2237304B1 (en
Inventor
Naoya Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Hokuto Electronics Corp
Original Assignee
Toshiba Hokuto Electronics Corp
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 Toshiba Hokuto Electronics Corp filed Critical Toshiba Hokuto Electronics Corp
Publication of EP2237304A2 publication Critical patent/EP2237304A2/en
Publication of EP2237304A3 publication Critical patent/EP2237304A3/en
Application granted granted Critical
Publication of EP2237304B1 publication Critical patent/EP2237304B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Microwave Tubes (AREA)

Abstract

Unnecessary noises generated from a magnetron for a microwave oven are suppressed.
In a magnetron 10 for a microwave oven, the diameter IP1 of the through-hole 33 of the input side pole piece 31 is 8.6 to 9.1 mm and the outer diameter IP2 of the internal surface 41 of the input side pole piece 31 is 15 to 16 mm, while the diameter OP1 of the through-hole 34 of the output side pole piece 32 is 7.9 to 8.1 mm and the outer diameter OP2 of the internal surface 42 of the output side pole piece 32 is 11 to 13 mm. Additionally, the interval distance D1 between the outer annular portion 35 of the input side pole piece 31 and the outer annular portion 36 of the output side pole piece 32 is 11.5 to 13.5 mm and the interval distance D2 between the inner annular portion 39 of the input side pole piece 31 and the inner annular portion 40 of the output side pole piece 32 is 10.2 to 11.2 mm.
EP20100156389 2009-03-30 2010-03-12 Magnetron for microwave oven Active EP2237304B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009080797A JP5415119B2 (en) 2009-03-30 2009-03-30 Magnetron for microwave oven

Publications (3)

Publication Number Publication Date
EP2237304A2 EP2237304A2 (en) 2010-10-06
EP2237304A3 true EP2237304A3 (en) 2011-02-16
EP2237304B1 EP2237304B1 (en) 2012-10-17

Family

ID=42104471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100156389 Active EP2237304B1 (en) 2009-03-30 2010-03-12 Magnetron for microwave oven

Country Status (4)

Country Link
EP (1) EP2237304B1 (en)
JP (1) JP5415119B2 (en)
KR (1) KR101667051B1 (en)
CN (1) CN101853759B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102339710B (en) * 2011-08-03 2014-12-03 广东威特真空电子制造有限公司 Magnetron
JP6254793B2 (en) * 2013-08-29 2017-12-27 東芝ホクト電子株式会社 Magnetron
KR102149316B1 (en) * 2013-12-18 2020-10-15 삼성전자주식회사 Magnetron and High frequency heating apparatus
JP5805842B1 (en) 2014-12-03 2015-11-10 東芝ホクト電子株式会社 Magnetron

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006260976A (en) * 2005-03-17 2006-09-28 Matsushita Electric Ind Co Ltd Magnetron
EP1870923A2 (en) * 2006-06-19 2007-12-26 Toshiba Hokuto Electronics Corporation Magnetron
EP2037482A2 (en) * 2007-09-11 2009-03-18 Toshiba Hokuto Electronics Corporation Magnetron for microwave oven

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09129149A (en) * 1995-10-30 1997-05-16 Sanyo Electric Co Ltd Magnetron
JP2002343262A (en) * 2001-05-17 2002-11-29 Sanyo Electric Co Ltd Magnetron
EP1286379B1 (en) * 2001-08-22 2012-05-09 Panasonic Corporation Magnetron
JP2003059414A (en) * 2001-08-22 2003-02-28 Matsushita Electric Ind Co Ltd Magnetron
JP5055872B2 (en) * 2006-07-25 2012-10-24 パナソニック株式会社 Magnetron

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006260976A (en) * 2005-03-17 2006-09-28 Matsushita Electric Ind Co Ltd Magnetron
EP1870923A2 (en) * 2006-06-19 2007-12-26 Toshiba Hokuto Electronics Corporation Magnetron
EP2037482A2 (en) * 2007-09-11 2009-03-18 Toshiba Hokuto Electronics Corporation Magnetron for microwave oven

Also Published As

Publication number Publication date
CN101853759A (en) 2010-10-06
EP2237304A2 (en) 2010-10-06
KR101667051B1 (en) 2016-10-17
JP5415119B2 (en) 2014-02-12
CN101853759B (en) 2014-11-05
JP2010232114A (en) 2010-10-14
KR20100109444A (en) 2010-10-08
EP2237304B1 (en) 2012-10-17

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