EP0949848A1 - Four à micro-ondes comportant dans une cavité des portions concaves circulaires pour distribuer les micro-ondes - Google Patents

Four à micro-ondes comportant dans une cavité des portions concaves circulaires pour distribuer les micro-ondes Download PDF

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Publication number
EP0949848A1
EP0949848A1 EP98106683A EP98106683A EP0949848A1 EP 0949848 A1 EP0949848 A1 EP 0949848A1 EP 98106683 A EP98106683 A EP 98106683A EP 98106683 A EP98106683 A EP 98106683A EP 0949848 A1 EP0949848 A1 EP 0949848A1
Authority
EP
European Patent Office
Prior art keywords
microwave
arcuate concave
side wall
microwave oven
center
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
EP98106683A
Other languages
German (de)
English (en)
Other versions
EP0949848B1 (fr
Inventor
Woo Keun Jun
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.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
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 Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Priority to DE1998632588 priority Critical patent/DE69832588T2/de
Priority to EP19980106683 priority patent/EP0949848B1/fr
Publication of EP0949848A1 publication Critical patent/EP0949848A1/fr
Application granted granted Critical
Publication of EP0949848B1 publication Critical patent/EP0949848B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H05B6/704—Feed lines using microwave polarisers
    • 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
    • H05B6/6426—Aspects relating to the exterior of the microwave heating apparatus, e.g. metal casing, power cord
    • 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
    • H05B6/74—Mode transformers or mode stirrers

Definitions

  • conventional microwave oven 400 has a cabinet 430.
  • Cabinet 430 includes a cooking cavity 410 and a control chamber 420 which are separated from each other by a partition 415.
  • U.S. patent No. 5,698,128 issued to Sakai discloses a microwave oven in which projections are formed in the cooking cavity.
  • a plurality of convex projections of different sizes are formed in the cooking cavity so as to uniformly distribute the microwaves radiated into the cooking cavity.
  • forming the projections in the cooking cavity is difficult and the microwaves are not properly distributed in the cooking cavity if the convex projections are insufficiently provided in the cooking cavity.
  • the second and third side walls are formed with two arcuate concave portions, respectively, which are spaced by a predetermined distance apart from each other.
  • Each concave portion has a diameter larger than a half wavelength of the microwave.
  • a distance between a center of the arcuate concave portion formed at the second side wall and the bottom wall is larger than a half wavelength of the microwave.
  • Each concave portion has a depth in a range of 3 to 24mm.
  • a distance L between a center C of each arcuate concave portion 182 formed at second side wall 117 and the bottom wall is larger than a half wavelength of the microwave. According to the preferred embodiment of the present invention, distance L is larger than 60mm. Also, a depth d of the arcuate concave portion is in a range of 3 to 24mm. Within this range, first and second arcuate concave portions can have different depths from each other.
  • FIGs. 7 and 8 are graphs showing the above results.
  • a temperature difference w 1 between upper and middle portions of the milk bottle was larger than a temperature difference w 2 between middle and lower portions of the milk bottle.
  • temperature difference w 1 between upper and middle portions of the milk bottle is similar to temperature difference w 2 between middle and lower portions of the milk bottle. Accordingly, it is understood that the microwave oven of the present invention can uniformly heat the foodstuffs vertically.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Electric Ovens (AREA)
EP19980106683 1998-04-11 1998-04-11 Four à micro-ondes comportant dans une cavité des portions concaves circulaires pour distribuer les micro-ondes Expired - Lifetime EP0949848B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1998632588 DE69832588T2 (de) 1998-04-11 1998-04-11 Mikrowellenherd mit kreisförmigen konkave Portionen in einem Hohlraum zum Verteilen der Mikrowellen
EP19980106683 EP0949848B1 (fr) 1998-04-11 1998-04-11 Four à micro-ondes comportant dans une cavité des portions concaves circulaires pour distribuer les micro-ondes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980106683 EP0949848B1 (fr) 1998-04-11 1998-04-11 Four à micro-ondes comportant dans une cavité des portions concaves circulaires pour distribuer les micro-ondes

Publications (2)

Publication Number Publication Date
EP0949848A1 true EP0949848A1 (fr) 1999-10-13
EP0949848B1 EP0949848B1 (fr) 2005-11-30

Family

ID=8231754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980106683 Expired - Lifetime EP0949848B1 (fr) 1998-04-11 1998-04-11 Four à micro-ondes comportant dans une cavité des portions concaves circulaires pour distribuer les micro-ondes

Country Status (2)

Country Link
EP (1) EP0949848B1 (fr)
DE (1) DE69832588T2 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH369836A (de) * 1959-07-15 1963-06-15 Therma Ag Vorrichtung zur Erwärmung von Stoffen mittels Hochfrequenzenergie
DE1515156A1 (de) * 1964-07-03 1969-07-03 Siemens Elektrogeraete Gmbh Garraum eines HF-Strahlungsherdes
US3461260A (en) * 1966-05-16 1969-08-12 Gen Motors Corp Microwave oven
EP0274164A1 (fr) * 1987-01-08 1988-07-13 Philips Norden AB Four à micro-ondes
JPH06196257A (ja) * 1992-12-24 1994-07-15 Hitachi Ltd 電子レンジ
DE4313806A1 (de) * 1993-04-27 1994-11-03 Rene Salina Vorrichtung zum Erhitzen von Materialien in einer mit Mikrowellen bestrahlbaren Heizkammer und Verfahren zum Herstellen von keramischem Gut, bei dem das Rohgut mittels Mikrowellen getrocknet wird
JPH08213166A (ja) * 1995-02-09 1996-08-20 Tiger Vacuum Bottle Co Ltd 高周波加熱装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH369836A (de) * 1959-07-15 1963-06-15 Therma Ag Vorrichtung zur Erwärmung von Stoffen mittels Hochfrequenzenergie
DE1515156A1 (de) * 1964-07-03 1969-07-03 Siemens Elektrogeraete Gmbh Garraum eines HF-Strahlungsherdes
US3461260A (en) * 1966-05-16 1969-08-12 Gen Motors Corp Microwave oven
EP0274164A1 (fr) * 1987-01-08 1988-07-13 Philips Norden AB Four à micro-ondes
JPH06196257A (ja) * 1992-12-24 1994-07-15 Hitachi Ltd 電子レンジ
DE4313806A1 (de) * 1993-04-27 1994-11-03 Rene Salina Vorrichtung zum Erhitzen von Materialien in einer mit Mikrowellen bestrahlbaren Heizkammer und Verfahren zum Herstellen von keramischem Gut, bei dem das Rohgut mittels Mikrowellen getrocknet wird
JPH08213166A (ja) * 1995-02-09 1996-08-20 Tiger Vacuum Bottle Co Ltd 高周波加熱装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 540 (E - 1616) 14 October 1994 (1994-10-14) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 012 26 December 1996 (1996-12-26) *

Also Published As

Publication number Publication date
DE69832588T2 (de) 2006-08-10
DE69832588D1 (de) 2006-01-05
EP0949848B1 (fr) 2005-11-30

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