EP1058483B1 - Four à micro-ondes avec élément de chauffage à rayonnement - Google Patents

Four à micro-ondes avec élément de chauffage à rayonnement Download PDF

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Publication number
EP1058483B1
EP1058483B1 EP99308444A EP99308444A EP1058483B1 EP 1058483 B1 EP1058483 B1 EP 1058483B1 EP 99308444 A EP99308444 A EP 99308444A EP 99308444 A EP99308444 A EP 99308444A EP 1058483 B1 EP1058483 B1 EP 1058483B1
Authority
EP
European Patent Office
Prior art keywords
heating element
microwave oven
cooking chamber
oven according
rear panel
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.)
Expired - Lifetime
Application number
EP99308444A
Other languages
German (de)
English (en)
Other versions
EP1058483A1 (fr
Inventor
Won-Woo Choi
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1058483A1 publication Critical patent/EP1058483A1/fr
Application granted granted Critical
Publication of EP1058483B1 publication Critical patent/EP1058483B1/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
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/766—Microwave radiation screens for windows
    • 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
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves
    • 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
    • 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
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
    • H05B6/6485—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating further combined with convection heating

Definitions

  • the present invention relates to a microwave oven having a cooking chamber and an electric heating element mounted in the cooking chamber for movement between horizontal and vertical configurations.
  • Microwave ovens and their mode of operation are well known. Recently, radiant heating elements have been added to microwave ovens. The radiant heating elements can be used for two modes of cooking: grilling mode and fan-assisted convection mode.
  • the heating element In the grilling mode, food is heated by infrared radiation from the heating element directly so that browning of the food can occur. In the convection mode, the heating element is used to heat the air in the cooking chamber which then heats the food.
  • a grill heating element 22 is mounted horizontally at the top of a cooking chamber 12 and a convection heating element 24 and a fan assembly 26 are mounted behind a rear panel 13 of an inner case 11 which forms the cooking chamber 12.
  • the fan assembly 26 has a motor 27, a fan 28, and a motor cooling fan 29.
  • An insulation plate 19 is mounted on the rear panel 13 and disposed between the fan 28 and the motor cooling fan 29, so that the insulation plate 19 prevents transmission of heat generated from the heating element 24 to the motor 27.
  • a back panel 18 is fixed to the rear panel 13, enclosing the fan assembly 26.
  • the rear panel 13 has a plurality of inlet holes 14 and outlet holes 15 in order for air to flow in and out of a rear space 16 between the cooking chamber 12 and the rear panel 13.
  • the grill mode electric power is applied to the grill heating element 22 and infrared radiation irradiates the F from the grill heating element 22.
  • the convection mode electric power is applied to the convection heating element 24 and the fan 28 of the fan assembly 26.
  • the fan 28 rotates, air in the cooking chamber 12 flows into the space 16 between the rear panel 13 and the insulation plate 19 through the plurality of inlet holes 14 of the rear panel 13.
  • the air that has flowed into the space 16 is heated by the convection heating element 24, and the heated air is driven into the cooking chamber 12 through the plurality of outlet holes 15 of the rear panel 13. While the air circulates in the cooking chamber 12 and the rear space 16 behind the rear panel 13, the food F is heated by air heated by the convection heating element 24.
  • a heating element 22' for both grilling mode and convection mode is rotatably mounted so that it can be pivoted between a horizontal position at the top of the cooking chamber 12' and a vertical position at the back of the cooking chamber 12'.
  • a fan assembly 26' and a back panel 18' are mounted behind a rear panel 13'.
  • the rear panel 13' has a plurality of inlet holes 14' and a plurality of outlet holes 15' in order for air to flow into and out of a rear space 16' between the cooking chamber 12' and the rear panel 13'.
  • An insulation plate 19' is mounted along the perimeter of the rear panel 13'. Since, the heating element 21' is mounted in the cooking chamber 12', there is a relatively long distance between the heating element 22' and a motor 27' of the fan assembly 26', so that the insulation plate 19' is smaller than the insulation plate in the microwave oven shown in Figure 5.
  • the heating element 22' In the grilling mode, the heating element 22' is horizontally disposed at the top of the cooking chamber 12' and the fan assembly 26' is not driven. The food F is irradiated directly with infrared radiation produced by the heating element 22'. In the convection mode, the heating element 22' is rotated by a rotator into its vertical position. In this case, when the fan assembly 26' is driven, air in the cooking chamber 12' is circulated between the cooking chamber 12' and the rear space 16' by the fan 28', and heat from the heating element 22' is transmitted to the food F by the circulating air so that the food F is heated.
  • the above-described microwave oven having the dual use heating element 22' ('dual use heating element' refers to a "heating element for both the grilling mode and the convection mode") has the following drawback. Since the heating element 22' is vertically positioned at the back of the cooking chamber 12' in the convection mode, food is subject to infrared radiation directly from the heating element 22'. Accordingly, the microwave oven has a drawback in that the food F is not heated evenly in the convection mode. Furthermore, as a user removes cooked food from the microwave oven, it is possible that the user's hand could be burnt by the heating element 22'.
  • a microwave oven according to the present invention is characterised by shield means for preventing direct irradiation of food by the heating element when the heating element is in said vertical configuration.
  • the heating element is above a food receiving part of the cooking chamber when in its horizontal configuration.
  • the heating element is to one side of a food receiving part of the cooking chamber when in its vertical configuration.
  • the shield means is mounted for movement with the heating element. More preferably, when the heating element is in its horizontal configuration, the shield means is above the heating element. Still more preferably, the shield means comprises a panel coupled to the heating element. The panel is preferably perforated but substantially free of perforations aligned with the heating element which would allow direct irradiation of food with the heating element in its vertical configuration.
  • a fan is included for circulating air through the chamber, during which operation the air is drawn past the heating element out of the cooking chamber when the heating element is in its vertical configuration.
  • a microwave oven has inner and outer bodies 120, 112, and various electric components mounted between the inner and outer bodies 120, 112.
  • the inner body 120 is divided by a partition 126 into a cooking chamber 101 and an electrical component chamber 102.
  • An upper panel 124 of the inner body 120 forms the top of the cooking chamber 101.
  • a door 114 is mounted at the front of the cooking chamber 101 and a control panel 116 is mounted at the front of the electric component chamber 102.
  • a fan assembly 141 and a back panel 118 are mounted behind a rear panel 122 of the inner body 120.
  • a rectangular insulator 119 ( Figure 3) is mounted along the perimeter of the rear panel 122.
  • the rear panel 122 has a plurality of holes 123 so that air can easily flow into and out of the cooking chamber 101 and a rear space 103 behind the rear panel 122.
  • the fan assembly 141 has a fan 142 for generating an air current between the cooking chamber 101 and the rear space 103 behind the rear panel 122, a motor 143 for driving the fan 142, a motor cooling fan 144 mounted coaxially to the fan 142 in order to cool the motor 143, and a bracket 145 for attaching the motor 143 to the back panel 118.
  • the electric component chamber 102 includes microwave generating parts for radiating microwaves into the cooking chamber 101, including a magnetron 132 for generating microwaves, a high-voltage transformer 134, a high-voltage diode 135, and a high-voltage capacitor 136 for driving the magnetron 132, a waveguide for guiding the generated microwaves to the cooking chamber 101 from the magnetron 132, and a cooling fan 137 for cooling the parts in the electric component chamber 102, and so on.
  • microwave generating parts for radiating microwaves into the cooking chamber 101, including a magnetron 132 for generating microwaves, a high-voltage transformer 134, a high-voltage diode 135, and a high-voltage capacitor 136 for driving the magnetron 132, a waveguide for guiding the generated microwaves to the cooking chamber 101 from the magnetron 132, and a cooling fan 137 for cooling the parts in the electric component chamber 102, and so on.
  • a turntable 138 for holding food F and a motor 146 for rotating the turntable 138 are mounted at the bottom of the cooking chamber 101 and a heating element assembly is mounted at the top of the cooking chamber 101.
  • the heating element assembly has a rotator (not shown) for rotating the heating element 139 and a radiation shield 150.
  • the heating element 139 is mounted for rotation between a horizontal position by the roof of the cooking chamber 101 and a vertical position by the rear panel 122 of the cooking chamber 101.
  • the rotator rotates the heating element 139 between the horizontal position and the vertical position according to the cooking mode and could be automatically or manually operable.
  • the rotator may be as described in US-A-5793023 or US-A-5534681.
  • the shield 150 is mounted to one side of the heating element 139 by a plurality of fasteners 152. Each one of the fasteners is ring-shaped and is fixed to one side of the shield 150. Each of the fasteners 152 has a slit through which the heating element 139 is pressed.
  • the shield 150 has a plurality of inlet holes 154 formed on the centre portion thereof and a plurality of outlet holes 156 formed in its margin.
  • the heating element 139 fixed to the shield 150 is positioned by the rear panel 122 of the inner body 120. Air, which is circulated by the fan assembly 141, flows into and out of the cooking chamber 101 and the rear space 103 through the inlet holes 154 and outlet holes 156 in the shield 150.
  • the heating element 139 When food F is cooked using the grilling mode, the heating element 139, as shown in Figure 3, is horizontally positioned at the top of the cooking chamber 101 and the shield 150 is positioned between the roof of the cooking chamber 101 and the heating element 139. Accordingly, infrared radiation generated by the heating element 139 is transmitted to the food F located on the turntable 138. The surface of the food F is browned by the infrared radiation.
  • the heating element 139 When food F is cooked in the convection mode, the heating element 139, as shown in Figure 4, is vertically positioned by the rear panel 122 of the inner body 120. In this state, the heating element 139 is positioned between the shield 150 and the rear panel 122.
  • the fan 142 of the fan assembly 141 is operated together with the heating element 139. Air in the cooking chamber 101 is drawn into the rear space 103 through the inlet holes 154 in the insulation plate 150 and holes 123 in the rear panel 122 by the fan 142 and the air in the rear space 103 is driven into the cooking chamber 101 through holes 123 in the rear panel 122 and the outlet holes 156 in the shield 150, thereby circulating as shown by the arrows in Figure 4.
  • the air is heated by the heating 139 when passing between the shield 150 and the rear panel 122, and the heated hot air transmits thermal energy to the food F in the cooking chamber 101 to heat the food F.
  • the infrared radiation generated by the heating element 139 is not transmitted to the cooking chamber 101 because of the shield 150 but reflected towards the rear panel 122. Accordingly, the infrared radiation from the heating element 139 is not directly transmitted to the food F in the cooking chamber 101, but heats the ambient air around the heating element 139. As a result, since the food F is heated by a flow of hot air, the food F is evenly and entirely heated. As stated above, the grilling and convection modes may be performed alone or with microwave heating by means of the magnetron.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)

Claims (13)

  1. Four à micro-ondes comportant une chambre de cuisson (101) et un élément de chauffage électrique (139) monté dans la chambre de cuisson (101) pour un mouvement entre des configurations horizontale et verticale, caractérisé par des moyens formant écran (150) pour éviter une irradiation directe des aliments par l'élément de chauffage (139) lorsque l'élément de chauffage (139) est dans ladite configuration verticale.
  2. Four à micro-ondes selon la revendication 1, dans lequel l'élément de chauffage (139) se trouve au-dessus d'une partie de réception des aliments (138) de la chambre de cuisson (101) lorsqu'il est dans sa configuration horizontale.
  3. Four à micro-ondes selon la revendication 1 ou 2, dans lequel l'élément de chauffage (139) se trouve d'un côté d'une partie de réception des aliments (138) de la chambre de cuisson lorsqu'il est dans sa configuration verticale.
  4. Four à micro-ondes selon la revendication 1, 2 ou 3, dans lequel les moyens formant écran (150) sont montés mobiles avec l'élément de chauffage (139).
  5. Four à micro-ondes selon la revendication 4, dans lequel, lorsque l'élément de chauffage (139) est dans sa configuration horizontale, les moyens formant écran (150) se trouvent au-dessus de l'élément de chauffage (139).
  6. Four à micro-ondes selon la revendication 4 ou 5, dans lequel les moyens formant écran (150) comprennent un panneau (150) accouplé à l'élément de chauffage (139).
  7. Four à micro-ondes selon la revendication 6, dans lequel le panneau (150) est perforé.
  8. Four à micro-ondes selon la revendication 7, dans lequel le panneau (150) est sensiblement exempt de perforations (156, 154) alignées avec l'élément de chauffage (139).
  9. Four à micro-ondes selon l'une quelconque des revendications précédentes, comprenant un ventilateur (122) pour la circulation d'air à travers la chambre de cuisson (101), dans lequel le ventilateur (122) aspire l'air au-delà de l'élément de chauffage (139) hors de la chambre de cuisson (101) lorsque l'élément de chauffage (139) est dans sa configuration verticale.
  10. Four à micro-ondes selon la revendication 1, comprenant :
    un corps comportant la chambre de cuisson (101) et un panneau arrière (112) formant la chambre de cuisson (101) et comportant une pluralité de trous traversants (123) ;
    des moyens (132) pour générer et diriger des micro-ondes vers la chambre de cuisson (101) ;
    un ensemble de chauffage qui peut être tourné par un mécanisme de rotation entre une position horizontale au niveau d'une partie supérieure de la chambre de cuisson et une position verticale face au panneau arrière (112) et comportant l'élément de chauffage (139) ; et
    un ensemble de ventilateurs de convection (141) monté derrière le panneau arrière (112) pour générer un courant d'air de convection dans la chambre de cuisson (101) à travers la pluralité de trous traversants (123) du panneau arrière (112).
  11. Four à micro-ondes selon la revendication 10, dans lequel les moyens formant écran (150) comprennent :
    une plaque d'isolation (150) comportant une pluralité de trous d'entrée (156) et une pluralité de trous de sortie (154) pour permettre le passage de l'air lorsque l'air est soufflé par l'ensemble de ventilateurs de convection (141), d'une manière telle que l'élément de chauffage (139) se trouve entre la plaque d'isolation (150) et le panneau arrière (122) et se trouve face au panneau arrière (122) ; et
    une pluralité d'éléments de fixation (152) pour relier la plaque d'isolation (150) à l'élément de chauffage (139) de sorte que la plaque d'isolation (150) puisse être mise en rotation en même temps que le dispositif de chauffage.
  12. Four à micro-ondes selon la revendication 11, dans lequel la pluralité de trous d'entrée (156) sont formés au niveau d'une partie centrale de la plaque d'isolation (150) et la pluralité de trous de sortie (154) sont formés le long d'un périmètre de la plaque d'isolation (150).
  13. Four à micro-ondes selon la revendication 11, dans lequel chacun de la pluralité d'éléments de fixation (152) est fixé à la plaque d'isolation (150), tandis que chacun des éléments de fixation (152) a la forme d'une bague comportant une ouverture pour correspondre à une partie de l'élément de chauffage (139).
EP99308444A 1999-05-29 1999-10-26 Four à micro-ondes avec élément de chauffage à rayonnement Expired - Lifetime EP1058483B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR9919601 1999-05-29
KR10-1999-0019601A KR100395559B1 (ko) 1999-05-29 1999-05-29 히터를 가지는 전자렌지

Publications (2)

Publication Number Publication Date
EP1058483A1 EP1058483A1 (fr) 2000-12-06
EP1058483B1 true EP1058483B1 (fr) 2004-05-26

Family

ID=19588569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99308444A Expired - Lifetime EP1058483B1 (fr) 1999-05-29 1999-10-26 Four à micro-ondes avec élément de chauffage à rayonnement

Country Status (5)

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EP (1) EP1058483B1 (fr)
KR (1) KR100395559B1 (fr)
DE (1) DE69917608T2 (fr)
ES (1) ES2218958T3 (fr)
RU (1) RU2175467C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666513B (zh) * 2008-09-05 2012-06-20 Lg电子株式会社 炊具

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60132423T2 (de) * 2000-11-30 2009-01-15 Lg Electronics Inc. Heizvorrichtung für einen Mikrowellenherd
GB0129559D0 (en) 2001-12-11 2002-01-30 Ceramaspeed Ltd Turntable incorporating heating means and oven incorporating the same
US6723962B1 (en) 2002-07-02 2004-04-20 Sun Cupid Industries Ltd. Double deck toaster oven
KR100862112B1 (ko) * 2006-09-01 2008-10-09 엘지전자 주식회사 조리기기
US7825358B2 (en) 2006-09-01 2010-11-02 Lg Electronics Inc. Cooking apparatus having rear component space
KR100901890B1 (ko) 2006-09-12 2009-06-10 엘지전자 주식회사 조리기기
KR20080024025A (ko) 2006-09-12 2008-03-17 엘지전자 주식회사 조리기기
KR102502178B1 (ko) * 2016-01-12 2023-02-21 삼성전자주식회사 조리 기기 및 조리 기기의 제어 방법
RU2646616C2 (ru) * 2016-03-01 2018-03-06 Самсунг Электроникс Ко., Лтд. Микроволновая печь
CN106214010A (zh) * 2016-09-08 2016-12-14 东莞市天倬电器有限公司 一种烤箱加热装置及烤箱
KR102556536B1 (ko) 2016-09-30 2023-07-17 삼성전자주식회사 조리 기기 및 조리 기기의 제어 방법

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Publication number Priority date Publication date Assignee Title
JPS5445850A (en) * 1977-09-17 1979-04-11 Sharp Corp Electronic oven with heater
JPS5481142U (fr) * 1977-11-21 1979-06-08
JPS59142607U (ja) * 1983-03-14 1984-09-22 シャープ株式会社 加熱調理装置における反射板取付装置
US4683362A (en) * 1984-09-21 1987-07-28 Yangas Roger A Reflective apparatus for microwave cooking
FR2701092B1 (fr) * 1993-01-29 1995-03-10 Thomson Electromenager Sa Appareil de cuisson à micro-ondes.
KR950009707Y1 (ko) * 1993-10-25 1995-11-22 대우전자주식회사 전자레인지의 스티러/컨벡션 겸용장치
EP0660646B1 (fr) * 1993-12-23 2001-10-24 Lg Electronics Inc. Four à micro-ondes
KR960002437U (ko) * 1994-06-22 1996-01-22 전자레인지의 가동히터 장치
KR960002411U (ko) * 1994-06-27 1996-01-22 그릴 및 콘벡션기능 겸용 히터가 구비된 전자레인지

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666513B (zh) * 2008-09-05 2012-06-20 Lg电子株式会社 炊具

Also Published As

Publication number Publication date
DE69917608T2 (de) 2005-07-07
KR20000075155A (ko) 2000-12-15
DE69917608D1 (de) 2004-07-01
KR100395559B1 (ko) 2003-08-25
ES2218958T3 (es) 2004-11-16
RU2175467C2 (ru) 2001-10-27
EP1058483A1 (fr) 2000-12-06

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