WO2022139695A1 - Four doté d'un dispositif de commande de préchauffage et son procédé de commande - Google Patents

Four doté d'un dispositif de commande de préchauffage et son procédé de commande Download PDF

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Publication number
WO2022139695A1
WO2022139695A1 PCT/TR2020/050918 TR2020050918W WO2022139695A1 WO 2022139695 A1 WO2022139695 A1 WO 2022139695A1 TR 2020050918 W TR2020050918 W TR 2020050918W WO 2022139695 A1 WO2022139695 A1 WO 2022139695A1
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WO
WIPO (PCT)
Prior art keywords
cycle time
temperature
heating element
control
oven
Prior art date
Application number
PCT/TR2020/050918
Other languages
English (en)
Inventor
Metin OZTURK
Fatih ZUNGOR
Enes BAYRAM
Burhaneddin EMRE
Original Assignee
Mamur Teknoloji Sistemleri San. A.S.
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 Mamur Teknoloji Sistemleri San. A.S. filed Critical Mamur Teknoloji Sistemleri San. A.S.
Priority to PCT/TR2020/050918 priority Critical patent/WO2022139695A1/fr
Priority to EP20967148.6A priority patent/EP4226092A1/fr
Publication of WO2022139695A1 publication Critical patent/WO2022139695A1/fr

Links

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
    • 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

Definitions

  • the invention relates to an oven control method, and particularly a control method and device to detect reaching a preheating temperature during the cooking operation.
  • the opening of the muffle surrounding a cooking chamber of the oven is covered by a door hinged to a housing.
  • a user cannot determine whether the temperature in the oven reaches the desired value in the ovens with mechanical thermostat.
  • an attempt is made to inform the user by connecting a lamp parallel to the output of the mechanical thermostat in order to display the oven reached the set temperature.
  • the lamp blinks every time the thermostat is activated or deactivated.
  • DE 102004061304A1 discloses the preheating process for an oven using a processor.
  • the device has a recording unit for storing recorded expiration of cooking process as recallable cooking program in a memory unit.
  • a control and regulating unit automatically heats the cooking equipment in accordance with the recallable program.
  • the control and regulating unit modifies a preheating phase of the stored program depending on the equipment output temperature detected by a sensor unit.
  • An independent claim is also included for a method for operating a heatable cooked equipment.
  • the invention relates to an oven comprising a heat-insulated muffle delimiting a cooking chamber and having at least one heating element therein; a temperature sensor disposed in the muffle so as to detect a current temperature of the cooking chamber during the cooking process; a mechanic thermostat configured so as to enable switching on and off in the cooking chamber creating successive cycles of increasing and decreasing between a minimum control temperature, and a maximum control temperature that define a temperature band to provide a predetermined reference temperature value.
  • the oven further comprising a feedback circuit arranged to detect the cycle time and the time between the opening and closing of the contact provided from an output of the mechanical thermostat in the cooking operation, and a control unit having a memory module connected to the feedback circuit in a signal transmitting manner such that records transmitted previous cycle time and is configured to obtain a current cycle time of the subsequent cycle following the previous cycle and compare with the previous cycle time recalled from the memory module within a predetermined tolerance range, and generates a preheating temperature set signal to an output of the control unit if determined as the same.
  • a simple feedback circuit it is possible to determine the state of reaching the preheating temperature by measuring the cycle times from the mechanical thermostat and comparing them with the help of the processor.
  • ovens with mechanical thermostats can be configured so as to detect the preheating with a simple feedback circuit adaptation.
  • the preheating temperature set signal may be an electrical signal from the control unit that triggers, for example, an audible warning system or display lighting element.
  • a preferred embodiment of the invention comprises a power circuit arranged to power the control unit and is connected to the heating element at a neutral pole.
  • the power circuit both supply power the control unit and provides a neutral pole to the heating element.
  • a preferred embodiment of the invention a phase pole feeds the power circuit at one end and receives an electrical signal from a commutator provided in a housing at the other end.
  • the phase pole allows the feedback circuit to be activated in a ready-to-operate state when the commutator is in the open position, that is, during the cooking operation.
  • an alarm unit is connected to the output of the control unit and providing a visual or audio warning when the preheating temperature set signal generated.
  • the alarm unit provides a visual, auditory, or tactile warning to the user when the cooking chamber reaches the reference temperature.
  • the alarm unit can be provided directly on the housing, or it can be located on a terminal with a local area network or remote network connection.
  • a preferred embodiment of the invention includes a control method for an oven described above.
  • the oven control method comprises the following process steps; comprising the following process steps; continuous activation and deactivation of the heating element by the mechanical thermostat for an initial heating period until the cooking chamber reaches the temperature band when the cooking operation is initiated; activation of the heating element until reaching the maximum control temperature and deactivation in a cycle by the mechanical thermostat powering the feedback circuit from the thermostat output when the current temperature drops below the minimum control temperature; transmitting the previous cycle time by the feedback unit to the processor to record the memory module; detecting the next current cycle time and transmitting to the processor by the feedback circuit; comparison of at least the previous cycle time and the current cycle time at a predetermined tolerance by the processor and generate an electric signal to the output if both are the same.
  • a preferred embodiment of the invention comprises the process step of comparison of previous cycle time followed by current cycle time with any sample cycle time and if the time periods are equal to each other within a predetermined tolerance then compare the previous cycle time with to preceding sample cycle time.
  • FIGURES Figure 1 is the front schematic illustration of an oven with a mechanical thermostat where a representative application of the oven preheating control method of the subject matter invention is operated.
  • Figure 3 is an electrical schematic illustration of a representative embodiment of the oven preheating control device.
  • FIG. 1 a representative embodiment of a household oven is shown schematically from the front portion.
  • the oven has a cooking chamber (8) delimited by a heat-insulated muffle (10) provided inside a housing (1).
  • a heating element (5) and an auxiliary heating element (6) in the electric resistance structure are provided adjacent to the upper and lower walls of the muffle (10), respectively.
  • a door (7) is hinged to the housing (1) in such a way that it can be opened, covering the opening of the muffle (10) from one side.
  • the door (7) is in the form of a panel and there is a panel on the upper portion, on which the rotating control elements (2) are located.
  • the cooking program is provided as a temperature-time diagram.
  • the cooking operation starts with the mechanical switch (28) energizing the heating element (5).
  • the mechanical thermostat (28) keeps the heating element (5) continuously operating for an initial heating period (ti) for the temperature of the cooking chamber (8) to reach the reference temperature (T re f) set by the control element (2) as quickly as possible.
  • the temperature in the cooking chamber (8) closely exceeds the reference temperature (T re f).
  • the mechanical thermostat (28) cuts off the energy of the heating element (5) at the end of the first heating period (ti) when it exceeds maximum control temperature (T ma x) adjusted in accordance with the reference temperature (Tret) and starts the cycle for cooking.
  • the temperature sensor (26) provides a valid temperature (T a ) information to the control unit (20) by continuously controlling the temperature of the cooking chamber (8) from the beginning of the cooking process.
  • the memory module (24) contains values for a minimum control temperature (T m in) than the reference temperature (T re f) and a large maximum control temperature (T max ) corresponding to the reference temperature (T re f) selected as a tabular value and forming a temperature band (B) gap thereof.
  • the mechanical thermostat (28) maintains the temperature of the cooking chamber (8) by driving the heating element (5) in its open-closed structure, making close fluctuations as per the set reference temperature (T re f).
  • a cycle is completed by turning off the heating element (5) at peak value above the reference temperature (T re f) of this fluctuation during a sample cycle period (t?) and re-energizing it at a low value below the reference temperature (T re f). It repeats the temperature cycle at close time intervals with the exemplary cycle time (t?, which is then described during the previous cycle time (ts) and then the previous cycle time (ts).
  • FIG 3 a representative electrical diagram of the oven is shown.
  • the reference temperature (T re f) is selected by the user with the rotating control element (2). Accordingly, the mechanical thermostat (28) is adjusted to the appropriate angular position. With the help of a commutator (30), which heating element (5) and/or auxiliary heating element (6) will perform the cooking operation is selected, and the heating element (5) is energized to heat the cooking chamber (8) via a power connection (25) connected to the mains.
  • the mechanical thermostat (28) controls the current temperature (T a ) in the cooking chamber (8) with the temperature sensor (26) and cuts the current to the heating element (5) when the maximum control temperature (T max ) adjusted according to the selected reference temperature (T re f) is exceeded.
  • the time from the beginning of the cooking operation until the heat is turned off is the first heating period (t 1 ).
  • the current temperature (T a ) of the cooking chamber (8) falls below the minimum control temperature (Tmin).
  • the mechanical thermostat (28) closes the circuit and reheats it to the maximum control temperature (T ma x).
  • each temperature fluctuation between the minimum control temperature (Tmin) and the maximum control temperature (T ma x) is called a cycle.
  • a feedback circuit (21 ) of the control unit (20) is connected in series to the output of the mechanical thermostat (28).
  • the feedback circuit (21 ) is energized by a power circuit (23) fed by a phase pole (252) of the power connection (25).
  • a neutral pole (251 ) output of the power circuit (23) is connected to the heating element (5) directly by means of a conductive cable.
  • the processor (22) is located on the same circuit board, providing signal transmission with the feedback circuit (21 ) and the power circuit (23) on the control unit (20).
  • An output of the processor (22) is connected to the alarm unit (27) for signal transmission.
  • the power connection (25) that feeds the power circuit (23) in the control unit (20) is connected to the commutator (30) at one end of the phase pole (252).
  • the feedback circuit (21 ) detects the sample cycle time (t?) that corresponds to the next cycle, and transmits it to the processor (22) and is stored in the memory module (24) over the processor (22).
  • the previous cycle time (t 3 ) is detected, and this previous sample cycle time (t?) is compared with the tolerance value in the memory module (24). If equal, the similarity indicator flag is set correctly in the memory module (24).
  • the current cycle time ( ) after the previous cycle time (t 3 ) is again detected by the feedback circuit (21 ) and compared with the previous cycle time (t 3 ) within the aforementioned tolerance range.
  • the processor (22) checks the similarity indicator and, if set correctly, sends a triggering electrical signal to the alarm unit (27), defining the preheating temperature set signal.
  • the alarm unit (27) comprises an audible warning system and an LED. When the alarm unit (27) is triggered, it generates sound and light and warns the user visually and audibly that the reference temperature (T re f) is reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

L'invention concerne un four comprenant un thermostat mécanique configuré pour activer et désactiver l'élément chauffant dans la chambre de cuisson (8) entre une température de commande minimale (Tmin) et une température de commande maximale (Tmax) qui définissent une bande de température (B) pour obtenir une valeur de température de référence (Tref) prédéterminée. Le four comprend également un circuit de rétroaction (21) agencé pour détecter le temps de cycle et le temps entre l'ouverture et la fermeture du contact fourni par une sortie du thermostat mécanique (28) et une unité de commande (20) configurée pour fournir un courant à une sortie (211) de l'unité de commande (20) qui génère un signal de réglage de température de préchauffage.
PCT/TR2020/050918 2020-10-06 2020-10-06 Four doté d'un dispositif de commande de préchauffage et son procédé de commande WO2022139695A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/TR2020/050918 WO2022139695A1 (fr) 2020-10-06 2020-10-06 Four doté d'un dispositif de commande de préchauffage et son procédé de commande
EP20967148.6A EP4226092A1 (fr) 2020-10-06 2020-10-06 Four doté d'un dispositif de commande de préchauffage et son procédé de commande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2020/050918 WO2022139695A1 (fr) 2020-10-06 2020-10-06 Four doté d'un dispositif de commande de préchauffage et son procédé de commande

Publications (1)

Publication Number Publication Date
WO2022139695A1 true WO2022139695A1 (fr) 2022-06-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2020/050918 WO2022139695A1 (fr) 2020-10-06 2020-10-06 Four doté d'un dispositif de commande de préchauffage et son procédé de commande

Country Status (2)

Country Link
EP (1) EP4226092A1 (fr)
WO (1) WO2022139695A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4914277A (en) * 1986-10-27 1990-04-03 De Dietrich Et Cie, S.A. Electronic control device for automatic cooking, including learning for home electric oven
US5296683A (en) * 1991-08-19 1994-03-22 Henny Penny Corporation Preheating method and apparatus for use in a food oven
EP2840319A1 (fr) * 2013-07-11 2015-02-25 Rational Aktiengesellschaft Procédé de conceptualisation et d'utilisation d'un profil d'utilisateur d'un appareil de cuisson et appareil de cuisson

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4914277A (en) * 1986-10-27 1990-04-03 De Dietrich Et Cie, S.A. Electronic control device for automatic cooking, including learning for home electric oven
US5296683A (en) * 1991-08-19 1994-03-22 Henny Penny Corporation Preheating method and apparatus for use in a food oven
EP2840319A1 (fr) * 2013-07-11 2015-02-25 Rational Aktiengesellschaft Procédé de conceptualisation et d'utilisation d'un profil d'utilisateur d'un appareil de cuisson et appareil de cuisson

Also Published As

Publication number Publication date
EP4226092A1 (fr) 2023-08-16

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