EP2798272B1 - Four avec capteur infrarouge - Google Patents

Four avec capteur infrarouge Download PDF

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Publication number
EP2798272B1
EP2798272B1 EP12808270.8A EP12808270A EP2798272B1 EP 2798272 B1 EP2798272 B1 EP 2798272B1 EP 12808270 A EP12808270 A EP 12808270A EP 2798272 B1 EP2798272 B1 EP 2798272B1
Authority
EP
European Patent Office
Prior art keywords
oven
opening
panel
infrared sensor
door
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.)
Not-in-force
Application number
EP12808270.8A
Other languages
German (de)
English (en)
Other versions
EP2798272A1 (fr
Inventor
Ahmet Ferit Cosan
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP2798272A1 publication Critical patent/EP2798272A1/fr
Application granted granted Critical
Publication of EP2798272B1 publication Critical patent/EP2798272B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00Stoves or ranges heated by electric energy
    • F24C7/08Arrangement or mounting of control or safety devices
    • F24C7/082Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/085Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on baking ovens
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/006Arrangements for circulation of cooling air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/02Doors specially adapted for stoves or ranges

Definitions

  • the present invention relates to an oven comprising an infrared sensor detecting infrared rays emitted from the foodstuff being cooked.
  • infrared temperature sensors that provide the surface temperature to be detected without contacting the foodstuff being cooked are used in ovens.
  • the infrared temperature sensor detects the infrared rays emitted from the foodstuff being cooked and determines the temperature, and the control unit regulates the cooking process parameters according to the data received from the infrared temperature sensor.
  • the infrared temperature sensor is composed of a lens converging (focusing) infrared rays emitted from the foodstuff being cooked and a thermopile array that converts the temperature data received by means of the converged infrared rays to electrical voltage and transmits it to the control unit.
  • the infrared temperature sensors detect the infrared rays emitted from the heating materials, no obstruct must be between them and the foodstuffs the surface temperature of which is desired to be measured, and the foodstuff being cooked must be in the field of view of the infrared temperature sensor.
  • the most suitable position that comes to mind for measuring the surface temperature of the foodstuff being cooked in any position in the oven is the top wall of the cooking cavity. By being placed into a window opened for example in the top wall of the cooking cavity, the infrared temperature sensor can easily see the foodstuff; however, the temperature of the cooking cavity may reach 280 degrees in known programs and 500 degrees in pyrolytic ovens.
  • a temperature estimating unit comprising an infrared temperature sensor, providing the foodstuffs to be cooked at the desired temperature.
  • a cooking device comprising a sensor module that is placed into the ventilating duct connected to the cooking chamber and that measures the infrared radiation in the cooking chamber.
  • a microwave oven comprising an infrared sensor that measures the surface temperature of the foodstuffs being cooked.
  • a cooking device comprising an infrared sensor that sees the foodstuff through a hole arranged at the ceiling of the cooking chamber.
  • the aim of the present invention is the realization of an oven comprising an infrared sensor that is not affected by the high temperatures in the cooking cavity.
  • the door of the oven realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof is composed of an outer panel forming the outer surface thereof and produced from glass, and an inner panel located at the inner side thereof and produced from glass.
  • An opening is arranged at the upper side of the door and an infrared sensor facing the opening is placed to the front panel.
  • the infrared sensor detects the infrared rays that are emitted from the foodstuff in the cooking cavity to reach the door and that pass through the opening by reflecting from between the outer panel and the inner panel, and provides the surface temperature of the foodstuff being cooked to be determined.
  • the infrared sensor is placed into the front panel at the upper side of the door, in alignment with the door and the part of the infrared sensor where the thermopile array is located remains inside the front panel.
  • the end of the infrared sensor where the lens converging the rays is located extends from the lower surface of the front panel towards the opening in the vertical direction.
  • the infrared sensor is placed inside the front panel in the vicinity of the control unit and the present cooling system provides both the control unit and the infrared sensor to be cooled.
  • the length of the cables providing communication between the infrared sensor and the control unit are kept short, thus providing ease of connection and immunity against electromagnetic interferences.
  • a hole is arranged on the inner panel, that provides the infrared rays emitted from the cooking cavity to be transmitted into the door.
  • a reflector that is flat, concave or convex is placed between the outer panel and the inner panel of the door, the infrared rays emitted from the cooking cavity are provided to be effectively reflected towards the opening from the inside of the door.
  • the motor of the cooling fan can be operated at variable speed; the control unit decides that the amount of humidity increases in the steady state where the temperature stops increasing and the temperature oscillates around a constant value by monitoring the temperature data received from the infrared sensor, thus increases the fan speed and the problem of vapor particles sticking to the lens of the infrared sensor and blocking its view is eliminated.
  • the infrared sensor In the oven of the present invention, being placed into the control panel, the infrared sensor is not subjected to high temperatures and is cooled by the fan together with the control unit.
  • the oven (1) comprises an exterior body (2), a cooking cavity (3) wherein the cooking process is performed, a control unit (4) that regulates the cooking process parameters, a door (5) providing access into the cooking cavity (3), an outer panel (6) forming the outer surface of the door (5) facing the user and produced from glass, an inner panel (7) having an air gap between the outer panel (6) and itself, forming the inner surface of the door (5) facing the cooking cavity (3) and produced from glass, a front panel (8) located at the upper side of the door (5) and that protects the control unit (4), a ventilating duct (9) located above the cooking cavity (3), a fan (10) placed into the ventilating duct (9), sucks air through the ventilating holes on the exterior body (2), discharging it from the ventilating duct (9), thus providing the cooling of the control unit (4) and the discharging of the humid air and an infrared sensor (13) that detects the infrared rays (shown in the figure with dashed lines) emitted from the foodstuff being cooked
  • the oven (1) of the present invention comprises an opening (14) located at the upper side of the door (5) and between the outer panel (6) and the inner panel (7) and the infrared sensor (13) that is placed to the front panel (8), with its lens (11) facing the opening (14) and that detects the infrared rays reflected from between the outer panel (6) and the inner panel (7) and passing through the opening (14).
  • the infrared sensor (13) is placed to the front panel (8) in alignment with the door (5).
  • the part of the infrared sensor (13) where the thermopile array (12) is located remains inside the front panel (8).
  • the end of the infrared sensor (13) where the lens (11) thereof is located extends from the lower surface of the front panel (8) towards the opening (14) in the vertical direction so that the opening (14) remains in the field of view.
  • the infrared sensor (13) placed to the front panel (8) is not affected by the high temperatures in the cooking cavity (3).
  • thermopile array (12) converts the infrared radiation data to electrical voltage and transmits it to the control unit (4).
  • the control unit (4) determines the temperature of the foodstuff being cooked by evaluating the voltage signals received from the thermopile array (12) and regulates the cooking process parameters.
  • the infrared sensor (13) is placed into the front panel (8) near the control unit (4).
  • the infrared sensor (13) is cooled by the fan (10) together with the electronic elements present in the control unit (4) and the front panel (8).
  • the length of the cables between the infrared sensor (13) and the control unit (4) shortens, thus providing ease of connection.
  • the oven (1) comprises a hole (15) that is arranged on the inner panel (7) and that transmits the infrared rays emitted from the foodstuff being cooked into the door (5), between the outer panel (6) and the inner panel (7).
  • the infrared rays emitted from the foodstuff enter between the outer panel (6) and the inner panel (7) from the hole (15), reach the opening (14) and are detected by the infrared sensor (13).
  • the oven (1) comprises a reflector (16) that is located between the outer panel (6) and the inner panel (7) and that reflects the infrared rays entering through the hole (15) to the opening (14).
  • the surface of the reflector (16) that reflects the infrared rays entering through the hole (15) to the opening (14) is concave.
  • the surface of the reflector (16) that reflects the infrared rays entering through the hole (15) to the opening (14) is convex.
  • the motor driving the fan (10) is of variable-speed type
  • the control unit (4) decides that the amount of humidity increases in the cooking cavity (3) in the steady state where the temperature stops increasing and the temperature oscillates around a constant value by monitoring the temperature data received from the infrared sensor (13) and thus increases the fan (10) speed until the end of the cooking process.
  • the moisture increasing in the cooking cavity (3) is provided to be quickly discharged to the outer environment, the vapor particles in the humid air are prevented from sticking to the lens (11) of the infrared sensor (13) close to the ventilating duct (9) and the infrared sensor (13) is prevented from making inaccurate measurements.
  • the infrared sensor (13) detects the temperature of the foodstuff in the cooking cavity (3) without being subjected to high temperatures.
  • the infrared sensor (13) to the front panel (8) at the position close to the control unit (4), the length of the cables needed for communicating with the control unit (4) are kept at minimum and immunity against electromagnetic interferences is provided.
  • the infrared sensor (13) in the front panel (8) benefits from the cooling provided by the fan (10) for the control unit (4).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (8)

  1. Un four (1) comprenant un corps extérieur (2), une chambre de cuisson (3) dans laquelle le processus de cuisson est effectué, une unité de commande (4), une porte (5), un panneau extérieur (6) qui forme la surface extérieure de la porte (5) faisant face à l'utilisateur, un panneau intérieur (7) qui présente une lame d'air entre le panneau extérieur (6) et lui-même, formant la surface intérieure de la porte (5) faisant face à la chambre de cuisson (3), un panneau avant (8), caractérisé en ce que
    le panneau avant est situé sur le côté supérieur de la porte (5) protège l'unité de commande (4),
    un capteur infrarouge (13) détecte les rayons infrarouges émis par le produit alimentaire cuit dans la chambre de cuisson (3) pour déterminer la température de surface de celui-ci et présente une lentille convergente (11) et un réseau à thermopile (12),
    une ouverture (14) est située sur le côté supérieur de la porte (5) entre le panneau extérieur (6) et le panneau intérieur (7) et le capteur infrarouge (13) est disposé sur le panneau avant (8) à proximité de l'unité de commande (4), dont la lentille (11) fait face à l'ouverture (14), et détecte les rayons infrarouges émis par le produit alimentaire cuit et réfléchis entre le panneau extérieur (6) et le panneau intérieur (7) et passant à travers l'ouverture (14), et un ventilateur (10) refroidit le capteur infrarouge (13) avec l'unité de commande (4) et le panneau avant (8).
  2. Un four (1) selon la Revendication 1, caractérisé par le capteur infrarouge (13) qui est placé sur le panneau avant (8) en alignement avec la porte (5), dont la partie sur laquelle le réseau à thermopile (12) est situé reste dans le panneau avant (8) et dont l'extrémité où sa lentille (11) est située s'étend à partir de la surface inférieure du panneau avant (8) vers l'ouverture (14) dans la direction verticale de telle sorte que l'ouverture (14) reste dans la champ de vision de la lentille (11).
  3. Un four (1) selon la Revendication 1 ou 2, caractérisé en ce que le capteur infrarouge (13) est placé dans le panneau avant (8) à proximité de l'unité de commande (4).
  4. Un four (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un trou (15) est arrangé sur le panneau intérieur (7) et transmet les rayons infrarouges émis par le produit alimentaire cuit dans la porte (5).
  5. Un four (1) selon la Revendication 4, caractérisé en ce qu'un réflecteur (16) est situé entre le panneau extérieur (6) et le panneau intérieur (7) et réfléchit les rayons infrarouges entrant à travers le trou (15) à l'ouverture (14).
  6. Un four (1) selon la Revendication 5, caractérisé par un réflecteur (16) dont la surface réfléchissant les rayons infrarouges entrant à travers le trou (15) à l'ouverture (14) est concave.
  7. Un four (1) selon la Revendication 5, caractérisé par un réflecteur (16) dont la surface réfléchissant les rayons infrarouges entrant à travers le trou (15) à l'ouverture (14) est convexe.
  8. Un four (1) selon l'une quelconque des revendications précédentes, caractérisé par l'unité de commande (4) qui décide que la quantité d'humidité augmente dans la chambre de cuisson (3) en régime permanent où la température cesse d'augmenter et la température varie autour d'une valeur constante en surveillant les données de température reçues du capteur infrarouge (13) et donc augmente la vitesse du ventilateur (10) jusqu'à la fin du processus de cuisson.
EP12808270.8A 2011-12-26 2012-11-26 Four avec capteur infrarouge Not-in-force EP2798272B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201112941 2011-12-26
PCT/EP2012/073567 WO2013098003A1 (fr) 2011-12-26 2012-11-26 Four avec capteur infrarouge

Publications (2)

Publication Number Publication Date
EP2798272A1 EP2798272A1 (fr) 2014-11-05
EP2798272B1 true EP2798272B1 (fr) 2017-03-08

Family

ID=47458863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12808270.8A Not-in-force EP2798272B1 (fr) 2011-12-26 2012-11-26 Four avec capteur infrarouge

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EP (1) EP2798272B1 (fr)
WO (1) WO2013098003A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013114230B4 (de) * 2013-12-17 2019-09-05 Rational Aktiengesellschaft Gargerät mit Optik
DE102020108572A1 (de) 2020-03-27 2021-09-30 Rational Aktiengesellschaft Gargerät mit Optik

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0233526A (ja) * 1988-07-21 1990-02-02 Hitachi Heating Appliance Co Ltd 焦げ目付け加熱調理器
US20110174978A1 (en) * 2010-01-18 2011-07-21 Heimann Sensor Gmbh Thermopile infrared sensor by monolithic silicon micromachining

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
GB2033108B (en) * 1978-09-26 1983-01-06 Matsushita Electric Ind Co Ltd Controlling heating apparatus
AU528250B2 (en) * 1979-03-02 1983-04-21 Matsushita Electric Industrial Co., Ltd. Heat-cooking apparatus incorporating infrared detecting system
US5660471A (en) * 1993-02-26 1997-08-26 Matsushita Electric Industrial Co., Ltd. Temperature distribution measuring device and measuring method
KR0133476B1 (ko) * 1994-03-18 1998-04-23 구자홍 마이크로 웨이브 오븐
JP2721827B2 (ja) 1995-09-25 1998-03-04 エルジー電子株式会社 サーモパイルセンサを用いた温度測定装置及び温度測定方法
DE19908800A1 (de) 1999-03-01 2000-09-07 Bsh Bosch Siemens Hausgeraete Gargerät mit Temperatursensor
JP3812346B2 (ja) 2001-02-20 2006-08-23 三菱電機株式会社 加熱調理器
JP3829274B2 (ja) 2001-05-30 2006-10-04 三菱電機株式会社 高周波加熱調理器
ATE432446T1 (de) * 2006-11-02 2009-06-15 Electrolux Home Prod Corp Vorrichtung und verfahren zum bestimmen der temperatur im inneren eines garguts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0233526A (ja) * 1988-07-21 1990-02-02 Hitachi Heating Appliance Co Ltd 焦げ目付け加熱調理器
US20110174978A1 (en) * 2010-01-18 2011-07-21 Heimann Sensor Gmbh Thermopile infrared sensor by monolithic silicon micromachining

Also Published As

Publication number Publication date
WO2013098003A1 (fr) 2013-07-04
EP2798272A1 (fr) 2014-11-05

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