EP2798912B1 - Ofen mit einem kühlgebläse - Google Patents

Ofen mit einem kühlgebläse Download PDF

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Publication number
EP2798912B1
EP2798912B1 EP12797815.3A EP12797815A EP2798912B1 EP 2798912 B1 EP2798912 B1 EP 2798912B1 EP 12797815 A EP12797815 A EP 12797815A EP 2798912 B1 EP2798912 B1 EP 2798912B1
Authority
EP
European Patent Office
Prior art keywords
cooling fan
control unit
humidity
humidity sensor
oven
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.)
Active
Application number
EP12797815.3A
Other languages
English (en)
French (fr)
Other versions
EP2798912A1 (de
Inventor
Ahmet Ferit Cosan
Asli Saime Kayihan
Mehmet Marasli
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
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Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Priority to PL12797815T priority Critical patent/PL2798912T3/pl
Publication of EP2798912A1 publication Critical patent/EP2798912A1/de
Application granted granted Critical
Publication of EP2798912B1 publication Critical patent/EP2798912B1/de
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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
    • H05B6/642—Cooling of the microwave components and related air circulation systems
    • 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
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • 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
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/085—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on baking ovens
    • 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
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/6458—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using humidity or vapor sensors

Definitions

  • the present invention relates to an oven comprising a cooling fan that provides the electronic elements to be cooled.
  • the electronic elements such as the control card, etc. situated in the control panel are cooled by means of a cooling fan and a ventilating duct wherein the fan is situated, disposed at the upper side of the casing enclosing the cooking cavity.
  • the cooling fan furthermore provides the hot and humid air passing from the chimney to the ventilating duct in the cooking process to be discharged outside.
  • the control unit and the other components in the front panel have to be cooled effectively since high temperature values may be reached.
  • the cooling fan operates in accordance with stopping and operating periods in predetermined durations during the cooking process.
  • the control unit sends signals relating to the operating and stopping of the fan motor for certain time periods in accordance with the fan operating program stored in its memory.
  • the fan does not operate even if the control unit sends signals to the fan motor for operating, and the fan is accepted as "operating" by the control unit even if the fan does not operate.
  • the control unit and the other electronic components are overheated and damaged.
  • temperature sensors disposed in the vicinity of the control unit are used for controlling the cooling fan; however, this is an expensive solution.
  • a cooking device which comprises a main exhaust duct and an auxiliary exhaust duct wherein temperature and humidity sensors are disposed.
  • the EP 1 156 282 A1 A discloses a baking oven having an outer casing, insulation for a cooking area, and a pipe that runs through the insulation outwards. A senor can be provided that measures the humidity of the exhaust gas leaving the pipe.
  • the aim of the present invention is the realization of an oven comprising a cooling fan that provides the cooling of the electronic elements and which is controlled whether or not it operates appropriately.
  • the present invention is defined by features of claim 1.
  • the control unit upon detecting a sudden increase of the measured humidity value in the air channel some time after the cooking process has started by monitoring data received from the humidity sensor, the control unit determines that the cooling fan is operating without any problem.
  • the control unit upon monitoring a regular increase and decrease, without a sudden increase of the measured humidity values in the air channel, decides that there is an error hindering the operation of the cooling fan and provides the user to be alerted.
  • the motor that drives the cooling fan is of variable speed and the control unit operates the cooling fan at high speed starting from the moment the monitored humidity amount decreases until the end of the cooking process.
  • a suction line is arranged at the lower section of the oven air channel and a discharge line at the upper section, and the humidity sensor is disposed in the discharge line.
  • the oven comprises an exhaust device extending from the cooking cavity to the suction line and a separator that separates the suction line from the discharge line.
  • the separator forms a barrier between the exhaust device and the humidity sensor in the discharge line, protecting the humidity sensor from the hot air rising from the exhaust device.
  • the humidity sensor is disposed at the center of the discharge line, at equal distances from the outlet port of the air channel and the cooling fan and thereby is provided to measure optimum humidity.
  • control unit and the other electronic elements subjected to high temperatures during the cooking process are cooled effectively by the cooling fan, occurrence of an error preventing operation of the cooling fan is detected by monitoring the humidity sensor data without requiring an additional control element.
  • the oven (1) comprises an exterior body (2), a cooking cavity (3) wherein the cooking process is performed, a door (4) providing access into the cooking cavity (3), a front panel (5) disposed at the upper side of the door (4), a control unit (6) disposed behind the front panel (5), an air channel (8) disposed at the upper side of the cooking cavity (3), having an outlet port (7) opening to the outside environment from between the door (4) and the front panel (5), a cooling fan (9) disposed inside the air channel (8), operated in accordance with a predetermined algorithm, in successive stopping and operating periods, providing the cooling of the control unit (6) by sucking air from the environment wherein the control unit (6) is situated and a humidity sensor (10) detecting the rate of humidity emitted by the cooking foodstuffs and providing the cooking process to be regulated by the control unit (6) depending on the rate of humidity.
  • the oven (1) of the present invention comprises the humidity sensor (10) disposed on the flow path of the humid air discharged to the outside environment by the cooling fan (9) and the control unit (6) that detects whether or not there is an error preventing operation of the cooling fan (9) by monitoring the data received from the humidity sensor (10).
  • the control unit (6) sends drive signal to the fan (9) motor for operation of the fan (9) and presumes that the cooling fan (9) is operating from the moment the drive signal is received; however, in the case an error occurs in the software or in the cable-connector connections or malfunctioning of the cooling fan (9) motor such as locking thereof, etc., the cooling fan (9) does not operate even if the control unit (6) sends signal.
  • the humidity sensor (10) delivers the data relating to the amount of humidity in the air emitted by the cooking foodstuffs and discharged by the cooling fan (9) through the air channel (8) to the control unit (6).
  • the humidity sensor (10) is disposed inside the air channel (8) in the flow path of the humid air discharged from the cooking cavity (3) to the outside environment by the cooling fan (9).
  • the control unit (6) controls whether or not the cooling fan (9) operates in accordance with the predetermined algorithm by monitoring the data received from the humidity sensor (10) and determines whether or not there is an error that prevents operation of the cooling fan (9).
  • the humidity sensor (10) besides the function of regulating the cooking process in accordance with humidity measurement, is also used as a safety element controlling the operation of the cooling fan (9) and the control unit (6) and the other electronic elements in the front panel (5) having the risk of overheating, are guaranteed to be cooled by the cooling fan (9).
  • control unit (6) determines that the cooling fan (9) is operating without any problem and that there aren't any errors preventing the operation of the cooling fan (9) ( Figure 2 ).
  • the humidity sensor (10) situated on the flow path of the air discharged from the air channel (8) by the cooling fan (9), is subjected to the humid air collected in the cooking cavity (3) and sucked into the air channel (8) and a sudden peak (P) is observed in the humidity values (H) measured by the humidity sensor (10).
  • the sudden peak (P) in the humidity values (H) is evaluated by the control unit (6) that the cooling fan (9) is operating without problems.
  • control unit (6) detects a regular increase and decrease in the humidity values (H) measured in the air channel (8) without occurrence of a sudden peak (P) by monitoring the change of data with respect to time (t) received from the humidity sensor (10), the control unit (6) decides that there is a failure relating to the cooling fan (9) motor or an error originating from cable-connector connections or the software ( Figure 3 ). Upon detecting an error preventing the operation of the cooling fan (9), the control unit (6) ends the cooking process and provides the user to be alerted that the cooling fan (9) does not operate by means of a visual or audible alerter (not shown in the figures).
  • the motor driving the cooling fan (9) is of variable speed and the control unit (6) operates the cooling fan (9) at high speed from the moment the amount of humidity starts to fall until the end of the cooking process due to increase of temperature in the cooking cavity (3) and hence in the proximity of the control unit (6) by monitoring the change of humidity value with respect to time.
  • the control unit (6) determines that more cooling is required towards the end of the cooking process by monitoring the humidity data and provides an effective cooling to be performed by operating the cooling fan (9) at high speed.
  • the oven (1) comprises a suction line (11) disposed at the lower section of the air channel (8), providing air to be sucked by the cooling fan (9) and a discharge line (12) disposed at the upper section of the air channel (8), providing the cooling fan (9) to discharge the air to the outside environment, and the humidity sensor (10) is disposed in the discharge line (12).
  • the oven (1) comprises an exhaust device (13) extending from the cooking cavity (3) to the suction line (11) in the vertical direction and a separator (14) extending from the outlet port (7) to the cooling fan (9) in the horizontal direction, separating the suction line (11) from the discharge line (12) and forming a barrier between the exhaust device (13) and the humidity sensor (10).
  • the separator (14) extends between the exhaust device (13) and the humidity sensor (10) inside the air channel (8), prevents the hot air rising from the exhaust device (13) from directly reaching the humidity sensor (10), thus the humidity sensor (10) is not subjected to the hot air rising from the exhaust device (13) and is protected from the high temperature in the cooking cavity (3).
  • the humidity sensor (10) is positioned at the center of the discharge line (12), so as to be almost at equal distance from the outlet port (7) and the cooling fan (9) and the humidity sensor (10) is provided to take optimum humidity measurements by improving the detection conditions. Since the humidity data oscillates more in the sections of the discharge line (12) farther away from and nearer to the cooling fan (9), the most optimum humidity measurement is realized at the middle section of the discharge line (12).
  • the control unit (6) and the other electronic elements in its proximity which are subjected to high temperature in the cooking process are cooled effectively by the cooling fan (9) and in the case the cooling fan (9) malfunctions or does not operate due to another error, the error detection is made by monitoring the data of the present humidity sensor (10) without requiring any other control element. Consequently, the delicate and high cost electronic elements are protected.

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

Claims (7)

  1. Ofen (1), umfassend einen Außenkörper (2), einen Garungshohlraum (3), in dem der Garungsprozess stattfindet, eine Tür (4), die Zugang zum Garungshohlraum (3) bietet, eine Frontblende (5), die an der Oberseite der Tür (4) angeordnet ist, eine Steuereinheit (6), die hinter der Frontblende (5) angeordnet ist, einen Luftkanal (8), der an der Oberseite des Garungshohlraums (3) angeordnet ist und eine Auslassöffnung (7) aufweist, die sich von einer Stelle zwischen der Tür (4) und der Frontblende (5) nach außen öffnet, ein Kühlgebläse (9), das im Luftkanal (8) angeordnet ist und gemäß einem vorgegebenen Algorithmus mit aufeinanderfolgenden Halte- und Betriebsperioden betrieben wird, und einen Feuchtigkeitssensor (10), der eine Rate von Feuchtigkeit erkennt, die von den zubereiteten Speisen abgegeben wird, und es ermöglicht, dass der Garungsvorgang von der Steuereinheit (6) abhängig von der Feuchtigkeitsrate geregelt wird, dadurch gekennzeichnet, dass der Feuchtigkeitssensor (10) im Strömungsweg der feuchten Luft angeordnet ist, die von dem Kühlgebläse (9) nach außen abgegeben wird, die Steuereinheit (6) erkennt, ob ein Fehler vorliegt, der den Betrieb des Kühlgebläses (9) verhindert, indem sie die Daten überwacht, die sie vom Feuchtigkeitssensor (10) empfängt,
    ferner dadurch gekennzeichnet, dass die Steuereinheit (6) bestimmt, dass keine Fehler vorliegen, den Betrieb des Kühlgebläses (9) verhindern, wenn sie eine plötzliche Spitze (P) in den Feuchtigkeitswerten (H) erkennt, die im Luftkanal (8) einige Zeit nach dem Beginn des Garungsvorgangs gemessen wird, indem sie die Veränderung der Daten vom Feuchtigkeitssensor (10) in Abhängigkeit von der Zeit (t) überwacht.
  2. Ofen (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Steuereinheit (6) bestimmt, dass ein Fehler im Zusammen mit dem Motor des Kühlgebläses (9) oder ein Fehler vorliegt, der von Kabel-Anschluss-Verbindungen oder der Software ausgeht, wenn sie einen regelmäßigen Anstieg und Abfall der Feuchtigkeitswerte (H) erkennt, die im Luftkanal (8) gemessen werden, ohne dass eine plötzliche Spitze (P) während des Garungsvorgangs auftritt, indem sie die Veränderung der Daten vom Feuchtigkeitssensor (10) in Abhängigkeit von der Zeit (t) überwacht.
  3. Ofen (1) nach Anspruch 2, dadurch gekennzeichnet, dass die Steuereinheit (6) den Garungsvorgang beendet und dafür sorgt, dass der Benutzer mittels einer sichtbaren und/oder hörbaren Warnung informiert wird, dass das Kühlgebläse (3) nicht arbeitet, wenn sie einen Fehler erkennt, der den Betrieb des Kühlgebläses (9) verhindert.
  4. Ofen (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Motor des Kühlgebläses (9) mit variabler Drehzahl ist und die Steuereinheit (6), sobald die Menge an Feuchtigkeit abfällt, und bis zum Ende des Garungsvorgangs das Kühlgebläse (9) bei hoher Drehzahl betreibt, indem sie die Veränderung der Feuchtigkeit in Abhängigkeit von der Zeit (t) überwacht.
  5. Ofen (1) nach einem der vorangehenden Ansprüche, gekennzeichnet durch eine Ansaugleitung (11), die an einem unteren Abschnitt des Luftkanals (8) angeordnet ist und dafür sorgt, dass Luft vom Kühlgebläse (9) angesaugt wird, eine Auslassleitung (12), die am oberen Abschnitt des Luftkanals (8) angeordnet ist und dafür sorgt, dass das Kühlgebläse (9) die Luft nach außen abgibt, und dadurch, dass der Feuchtigkeitssensor (10) in der Auslassleitung (12) angeordnet ist.
  6. Ofen (1) nach Anspruch 5, gekennzeichnet durch eine Abluftvorrichtung (13), die sich vom Garungshohlraum (3) zur Ansaugleitung (11) erstreckt, und einen Teiler (14), der sich von der Auslassöffnung (7) zum Kühlgebläse (9) erstreckt und die Ansaugleitung (11) von der Auslassleitung (12) trennt und eine Barriere zwischen der Abluftvorrichtung (13) und dem Feuchtigkeitssensor (10) bildet.
  7. Ofen (1) nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Feuchtigkeitssensor (10) in der Mitte der Auslassleitung (12) angeordnet ist, derart, dass er nahezu den gleichen Abstand von der Auslassöffnung (7) und dem Kühlgebläse (9) einnimmt.
EP12797815.3A 2011-12-26 2012-11-26 Ofen mit einem kühlgebläse Active EP2798912B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12797815T PL2798912T3 (pl) 2011-12-26 2012-11-26 Piekarnik zawierający wiatrak chłodzący

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201112948 2011-12-26
PCT/EP2012/073561 WO2013098002A1 (en) 2011-12-26 2012-11-26 An oven comprising a cooling fan

Publications (2)

Publication Number Publication Date
EP2798912A1 EP2798912A1 (de) 2014-11-05
EP2798912B1 true EP2798912B1 (de) 2016-03-02

Family

ID=47297188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12797815.3A Active EP2798912B1 (de) 2011-12-26 2012-11-26 Ofen mit einem kühlgebläse

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EP (1) EP2798912B1 (de)
ES (1) ES2572704T3 (de)
PL (1) PL2798912T3 (de)
WO (1) WO2013098002A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3049727A1 (de) * 2013-09-27 2016-08-03 Arçelik Anonim Sirketi Backofen mit einem kühlgebläse und verbessertes verfahren zur steuerung des kühlgebläses des backofens
DE102019209075A1 (de) * 2019-06-24 2020-12-24 BSH Hausgeräte GmbH Betreiben eines Haushalts-Gargeräts mit Kühllüfter
CN114468787B (zh) * 2021-12-23 2023-08-11 深圳市晨北科技有限公司 一种烹饪设备和烹饪设备的控制方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50108057D1 (de) * 2000-05-17 2005-12-22 V Zug Ag Zug Backofen-Entlüftung
DE102008044234B4 (de) * 2008-12-01 2012-03-29 BSH Bosch und Siemens Hausgeräte GmbH Gargerät

Also Published As

Publication number Publication date
ES2572704T3 (es) 2016-06-01
PL2798912T3 (pl) 2016-08-31
WO2013098002A1 (en) 2013-07-04
EP2798912A1 (de) 2014-11-05

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