EP0399178B1 - Appareil de cuisson des aliments avec un élément de chauffage radiant - Google Patents

Appareil de cuisson des aliments avec un élément de chauffage radiant Download PDF

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Publication number
EP0399178B1
EP0399178B1 EP90105904A EP90105904A EP0399178B1 EP 0399178 B1 EP0399178 B1 EP 0399178B1 EP 90105904 A EP90105904 A EP 90105904A EP 90105904 A EP90105904 A EP 90105904A EP 0399178 B1 EP0399178 B1 EP 0399178B1
Authority
EP
European Patent Office
Prior art keywords
reflector
cooking
heating element
appliance according
cooking appliance
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
EP90105904A
Other languages
German (de)
English (en)
Other versions
EP0399178A1 (fr
Inventor
Martin Thaler
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.)
BSH Hausgeraete GmbH
Original Assignee
Bosch Siemens Hausgerate GmbH
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 Bosch Siemens Hausgerate GmbH filed Critical Bosch Siemens Hausgerate GmbH
Publication of EP0399178A1 publication Critical patent/EP0399178A1/fr
Application granted granted Critical
Publication of EP0399178B1 publication Critical patent/EP0399178B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F24C15/00—Details
    • F24C15/22—Reflectors for radiation heaters
    • 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

Definitions

  • the invention relates to a cooking appliance with a radiant heating device according to the preamble of patent claim 1.
  • a parabolic reflector is assigned to the tubular or rod-shaped radiant heater, for example, which reflects the long-wave heat rays directed away from the food as a bundle of rays in the direction of the food to be treated.
  • the irradiated area is dimensioned relatively narrow, so that a plurality of radiant heaters and reflectors must be present in close proximity in order to obtain a larger irradiation area.
  • radiant heaters designed as halogen lamps are provided for heating a hotplate, with each halogen lamp being assigned two regions of the reflector which are essentially in the form of parabolic cylinder sections. In this way it should be achieved that even with a small number of lamps a homogeneous distribution of the radiation incident on the hotplate is obtained.
  • the reflector should have the best possible reflectivity and the lowest possible heat absorption capacity, with the latter Device additionally a cooling device in the form of a fan for the reflector is provided so that the temperature of the reflector can be kept relatively low.
  • the invention has for its object to improve the cooking device so that the thermal energy emanating from the radiant heater can be used as completely as possible for heating the food.
  • the efficiency of the radiant heating device can be further improved by providing the reflector with a thermally insulating coating on the surface facing away from the food to be cooked. In this way, practically all of the heat energy absorbed by the reflector is transported as secondary radiation in the direction of the food to be cooked.
  • the measure according to claim 3 optimizes the effectiveness of the reflected primary radiation emanating from the radiant heater and not emitted in the direction of the food by preventing bundling of this reflected primary radiation and obtaining a more uniform distribution of this reflected primary radiation over a larger area.
  • this measure is of importance when using tubular casing radiators as radiant heaters, with the angular radiation preventing undesired reflection of the primary radiation in the direction of the radiant heater or the radiant heater jacket.
  • a grill heater generally designated 2
  • a food support level 3 for example in the form of a grill, on which a food 4 to be heated, for example a piece of meat, is placed.
  • the grill radiator 2 consists of two spaced apart in the embodiment triangular tubular heaters 6, which are held on a frame-shaped grill holder 7, for example, which grill holder is in turn fastened to the upper muffle wall 1 by means of one or more rods 8.
  • the tubular heating elements consist of a closed metallic and triangular tube 61, in which a heating conductor 62 is located within an insulating filling.
  • the triangular shape of the tubular heating element increases its radiation surface facing the food 4 and the radiation surface facing the muffle wall 1 is kept as small as possible.
  • an axis plane 9 is indicated, which goes through the radiant heater axis and is perpendicular to the food support level 3.
  • the reflector consists of a thin metallic sheet material, preferably stainless steel sheet, with a sheet thickness of approximately 0.3 mm and thus has a small thermal mass.
  • the reflector has good heat absorption properties and a high corrosion resistance compared to the thermal energy emanating from the radiant heater 6.
  • the absorption properties can be obtained, for example, by the relatively dark design of the surface of the reflector 12 facing the radiant heater 6. This surface can be provided with a dark, absorption-friendly coating, or can be used without surface treatment of the raw material, the result being obtained even during relatively short-term operation Corrosion-related "blackening" of the sheet surface gives the reflector good absorption properties.
  • the reflector 12 has a reflector section 13 extending on both sides of the axis plane 9, the length dimension of which corresponds to the wide dimension of the tubular heating element 6 in the extent parallel to the reflection plane 10. At this reflector section 13 are followed at both ends by inclined reflector sections 14.
  • FIG. 3 a round tubular casing heating element 6 'being provided in this exemplary embodiment.
  • the reflector sections 14 are angled at an angle a of approximately 20 ° with respect to the reflector section 13.
  • the dimension b denotes the outer diameter of the tubular heating element 6 'and the length of the reflector section 13.
  • the triangular shape of the tubular heating element 6 increases the area of the tubular heating element radiating in the direction of the food 4 and keeps the area directed against the muffle wall 1 small.
  • the radiant heater according to FIGS. 2 and 3 is a round tubular casing heater 6 '.
  • the reflector section 131 of the reflector 121 directly adjacent to the axis plane 9 is divided into curved surfaces 132 on both sides of the axis plane 9, which curved surfaces extend away from the food to be cooked from the axis plane and are also curved thereafter. have reflector sections 133 extending in the direction of the food to be cooked.
  • the radiation arrows make it clear that the upward directed infrared rays emanating from the tubular casing heater 6 'are reflected at the reflector section 131 at an angle to the axis plane 9 that they pass the outer jacket of the tubular casing heater 6'.
  • the remaining infrared rays directed upwards or sideways are reflected at the reflector section 133 in a bundle-like manner and also at an angle to the axis plane 9 in the direction of the food to be cooked.
  • the reflector 122 is formed in a zigzag shape and, starting from the axis plane 9, has angularly rising, flat sections of the reflector section 134, the length of this reflector section 134 again corresponding to the width of the triangular tubular heating element 6.
  • the two flat sections of the reflector section 134 are in turn arranged starting from the axis plane 9 and away from the food to be cooked.
  • Downwardly inclined reflector sections 135 are arranged after the reflector section 132.
  • the ray path shown shows that the primary rays incident on the reflector sections 134 and 135 and emanating from the tubular heater 6 are reflected at an angle to the axis plane 9 and passing the tubular heater 6.
  • the reflector 6 is similar to the reflector shown in FIG. 4 and has an inner reflector section 136, the length of which corresponds to the diameter of the tubular heating element 6 '.
  • the region of the reflector section 137 which is drawn in the direction of the tubular casing heater 6 'and lies on the axial plane 9 is rounded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of Resistance Heating (AREA)
  • Electric Ovens (AREA)
  • Cookers (AREA)
  • Baking, Grill, Roasting (AREA)

Claims (10)

  1. Appareil de cuisson, notamment four de cuisson ou gril, comportant un dispositif de chauffage à rayonnement avec au moins un élément chauffant à rayonnement qui est disposé entre un plan de pose pour le produit à cuire et un réflecteur adapté pour délivrer un rayonnement secondaire produit par chauffage au moyen de l'élément chauffant à rayonnement, caractérisé par le fait que le réflecteur (12, 121 à 124) est constitué par une fine tôle métallique d'environ 0,3 mm d'épaisseur et comporte une surface d'absorption qui est tournée vers l'élément chauffant à rayonnement (6; 6') et absorbe le rayonnement thermique, de telle sorte que le réflecteur présente une faible masse thermique et de bonnes caractéristiques d'absorption vis-à-vis du rayonnement thermique et par le fait que pendant la cuisson, par réchauffage à une température supérieure à la température de cuisson, le réflecteur est amené à émettre un rayonnement secondaire à ondes courtes.
  2. Appareil de cuisson selon la revendication 1, caractérisé par le fait que le réflecteur est en tôle métallique résistante à la corrosion.
  3. Appareil de cuisson selon l'une des revendications précédentes, caractérisé par le fait que, dans la région du plan axial (9) qui passe par l'axe de l'élément chauffant à rayonnement et est normal au plan de pose (3) pour le produit à cuire, le réflecteur (12; 121 à 124) comporte de part et d'autre dudit plan, une partie de réflecteur (13; 131, 134, 136, 137) qui provoque une réflexion du rayonnement thermique sous un certain angle par rapport au plan axial.
  4. Appareil de cuisson selon la revendication 3, caractérisé par le fait que l'élément chauffant à rayonnement est un élément chauffant (6; 6') tubulaire, de préférence un élément à enveloppe tubulaire et par le fait que la longueur de la partie de réflecteur (12, 131; 134, 136, 137) correspond au diamètre extérieur de l'élément chauffant tubulaire.
  5. Appareil de cuisson selon la revendication 4, caractérisé par le fait que des parties de réflecteur (14; 135) inclinées de préférence de 20° par rapport à un plan de réflexion (10) normal au plan axial (9) se raccordent de chaque côté à la partie de réflecteur (13; 134).
  6. Appareil de cuisson selon l'une des revendications précédentes, caractérisé par le fait que la partie de réflecteur (13; 131, 134, 136, 137) contiguë au plan axial (9) comporte de part et d'autre du plan axial des surfaces planes ou incurvées qui forment un angle entre elles et à partir du plan axial s'éloignent du produit à cuire (4).
  7. Appareil de cuisson selon revendication 6, caractérisé par le fait que des parties de réflecteur (14; 133, 135) planes ou incurvées qui s'étendent en direction du produire à cuire se raccordent aux parties planes ou incurvées de chaque côté du plan axial (9).
  8. Appareil de cuisson selon l'une des revendications précédentes, caractérisé par le fait que le réflecteur sur sa face éloignée du produit à cuire est pourvu d'un revêtement thermiquement isolant.
  9. Appareil de cuisson selon l'une des revendications précédentes, caractérisé par le fait que l'élément chauffant (6) tubulaire est aplati sur son côté éloignée du produit à cuire (4) et est pourvu, à la suite de celui-ci, d'une partie d'enveloppe tubulaire tournée vers le produit à cuire dont la longueur en section transversale est supérieure à celle de la partie aplatie.
  10. Appareil de cuisson selon la revendication 9, caractérisé par le fait que l'élément chauffant (6) tubulaire a un profil triangulaire.
EP90105904A 1989-05-24 1990-03-28 Appareil de cuisson des aliments avec un élément de chauffage radiant Expired - Lifetime EP0399178B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3917000 1989-05-24
DE3917000A DE3917000C2 (de) 1989-05-24 1989-05-24 Strahlungsheizeinrichtung für Kochgeräte

Publications (2)

Publication Number Publication Date
EP0399178A1 EP0399178A1 (fr) 1990-11-28
EP0399178B1 true EP0399178B1 (fr) 1994-10-12

Family

ID=6381357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105904A Expired - Lifetime EP0399178B1 (fr) 1989-05-24 1990-03-28 Appareil de cuisson des aliments avec un élément de chauffage radiant

Country Status (5)

Country Link
EP (1) EP0399178B1 (fr)
AT (1) ATE112840T1 (fr)
DD (1) DD298964A5 (fr)
DE (2) DE3917000C2 (fr)
ES (1) ES2063187T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220095832A1 (en) * 2019-02-06 2022-03-31 Hervé MÉLÉDO Even cooking of foodstuffs by means of a device allowing static isolation, focusing, channeling and modulation of energies

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4221626C2 (de) * 1992-07-01 1994-06-16 Kernforschungsz Karlsruhe Infrarot-Strahlungsheizeinrichtung
KR960002662Y1 (ko) * 1992-07-04 1996-03-30 주식회사 이멕스 원적외선 튜브 히터를 설치한 오븐 조리기
GB9409433D0 (en) * 1994-05-16 1994-06-29 Univ Cranfield High efficiency oven
GB2367887A (en) * 2000-10-09 2002-04-17 Mindy Tsao Electric oven with heat radiation reflection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0261639A2 (fr) * 1986-09-24 1988-03-30 Nippon Chemical Plant Consultant Co., Ltd. Système rayonnant dans l'infrarouge lointain

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686477A (en) * 1971-08-06 1972-08-22 Gen Electric Mounting system for solid plate surface heating units
FR2556547B1 (fr) * 1983-12-12 1986-09-05 Acir Generateur electrique perfectionne de rayons infrarouges constituant epurateur d'atmosphere
US4629865A (en) * 1985-01-23 1986-12-16 Raytheon Company Electric oven with improved broiler
GB8523027D0 (en) * 1985-09-18 1985-10-23 Thorn Emi Appliances Grilling arrangement
DE3723077A1 (de) * 1987-07-11 1989-01-19 Bauknecht Hausgeraete Strahlheizkoerper fuer kochgeraete

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0261639A2 (fr) * 1986-09-24 1988-03-30 Nippon Chemical Plant Consultant Co., Ltd. Système rayonnant dans l'infrarouge lointain

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220095832A1 (en) * 2019-02-06 2022-03-31 Hervé MÉLÉDO Even cooking of foodstuffs by means of a device allowing static isolation, focusing, channeling and modulation of energies
US12245723B2 (en) * 2019-02-06 2025-03-11 Hervé MÉLÉDO Even cooking of foodstuffs by means of a device allowing static isolation, focusing, channeling and modulation of energies

Also Published As

Publication number Publication date
DD298964A5 (de) 1992-03-19
ES2063187T3 (es) 1995-01-01
DE3917000A1 (de) 1990-11-29
EP0399178A1 (fr) 1990-11-28
DE3917000C2 (de) 2000-10-26
DE59007428D1 (de) 1994-11-17
ATE112840T1 (de) 1994-10-15

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