EP1300050A1 - Procede pour controler un dispositif servant a influer sur la temperature du compartiment de cuisson d'un four, et four correspondant - Google Patents

Procede pour controler un dispositif servant a influer sur la temperature du compartiment de cuisson d'un four, et four correspondant

Info

Publication number
EP1300050A1
EP1300050A1 EP01965032A EP01965032A EP1300050A1 EP 1300050 A1 EP1300050 A1 EP 1300050A1 EP 01965032 A EP01965032 A EP 01965032A EP 01965032 A EP01965032 A EP 01965032A EP 1300050 A1 EP1300050 A1 EP 1300050A1
Authority
EP
European Patent Office
Prior art keywords
temperature
control unit
oven
devices
comparison
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.)
Withdrawn
Application number
EP01965032A
Other languages
German (de)
English (en)
Inventor
Manfred Plankl
Michael Ulmer
Martin Keller
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
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1300050A1 publication Critical patent/EP1300050A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1917—Control of temperature characterised by the use of electric means using digital means
    • 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 a method for checking a device for influencing the cooking space temperature of an oven according to the preamble of claim 1 and a corresponding oven according to the preamble of claim 9.
  • a generic device and a generic method are known from DE 198 35 622 A1, which describes a household appliance with at least two electrical heating elements and a resistance monitoring device which monitors the electrical resistance value while the heating element is switched on. A signal is generated automatically depending on the actual resistance value of the heating element.
  • the known method and the known device are relatively complex, since an electrical resistance must be provided and the actual value of the resistance must be monitored and evaluated.
  • the object of the invention is to provide a method and a device which is of simpler construction and less expensive to manufacture.
  • the object of the invention is achieved by the method with the features of claim 1 and by the oven with the features of claim 9.
  • An advantage of the invention is that the at least two devices for influencing the cooking space temperature of an oven are operated in a test mode for a predetermined test time and the temperature generated by the devices rature measured and a signal is generated depending on the value of the measured temperature.
  • a temperature sensor which is usually present anyway for regulating the cooking space temperature can additionally be used to monitor the functionality of a plurality, in particular heating devices.
  • the temperature difference is determined which is generated by the control of the device during the test time. A signal is generated depending on the value of the temperature difference.
  • the temperature difference represents a more precise value for checking the correct functioning of the device, since this largely avoids any influence on the ambient temperature.
  • a plurality of devices which are integrated in the oven are successively checked for correct functioning. This procedure offers the advantage that all devices of the oven are checked in a single test operation and thus a statement can be made about the correct functioning of the household appliance.
  • the device is automatically checked at predetermined times or given operating states of the oven. This procedure offers the advantage that the device is checked continuously and independently of the input of an operator. In this way it is ensured that a malfunction of the oven is recognized independently of the input by an operator.
  • Another advantageous embodiment of the invention is that the method is started via a data line from a locally remote control center. In this way, a remote diagnosis of the household appliance can be carried out.
  • An advantageous development of the invention consists in monitoring during a normal operating mode of the oven whether the temperature rise for this operating mode lies in a predetermined, characteristic range. If not If so, the method for checking the device is started in order to characterize the error more precisely.
  • FIG. 2 shows a first part of a flow chart for carrying out the method according to the invention
  • Fig. 4 is a diagram with a temperature characteristic curve, which shows the development of the temperature of the oven during a test operation of the oven.
  • Fig. 1 shows an oven 1, which has a control unit 2, the lines with a memory 3, a temperature sensor 4, a small bottom heater 5, a large bottom heater 6, a ring heater 7, an outer grill 8, an inner grill 9 and a circulating air blower 10 is connected.
  • the temperature sensor 4 detects, in a manner known per se, the cooking space temperature for its regulation by the control unit 2 by means of the heating devices.
  • control unit 2 has an interface 11, via which a data line can be connected to control unit 2.
  • an external diagnostic device 20 can be connected to the interface 11.
  • the small and large bottom heating devices are designed in the form of heating elements in the lower area of an oven.
  • the small bottom heater has a smaller maximum heating power than the large bottom heater.
  • the inner and outer grilling devices are arranged as heating elements in the upper area of the baking chamber.
  • the inner grill has a greater maximum power than the outer grill.
  • the Ring heating is arranged in the form of a heating element on a rear wall of the oven, which is arranged opposite the oven door.
  • the oven 1 also has a display field 13 which is connected to the control unit 2. Furthermore, control elements 12 are provided with which an operator can set, for example, a desired temperature of the oven and / or a predetermined program for baking a specific baked good. The control elements 12 are also connected to the control unit 2.
  • the start of the method according to the invention for checking the devices for influencing the temperature can be triggered via the control elements 12, for example by entering a predetermined key combination or by setting a predetermined position of the control elements 12.
  • Control programs are stored in the memory 3, according to which the control device 2 controls the device as a function of predetermined data in order to set a desired temperature in the oven or to carry out a desired baking process.
  • the small bottom heating device 5, the large bottom heating device 6, the ring heater 7, the outer grill device 8, the inner grill device 9 and the circulating air blower 10 are devices for influencing the temperature of the oven 1.
  • control unit 2 and 3 show a flow chart for checking the devices for influencing the temperature of the oven.
  • the process is started by entering a special key combination.
  • the control unit 2 then switches on the small bottom heating device 5 for a predetermined first test time of 120 seconds at program point 20. After the first test time has elapsed, a predetermined first waiting time of 60 seconds is waited for at program point 30.
  • the temperature in the oven of the oven 1 is measured as the first temperature by the control unit 2 via the temperature sensor 4.
  • control unit 2 compares the measured first temperature with a first temperature range stored in memory 3. The comparison shows that the the first temperature is not within the first temperature range, the program branches to program point 60 (FIG. 3). If the check at program point 50 shows that the first temperature is in the first temperature range, the program branches to program point 70.
  • control unit 2 switches on large underheat device 6 for a predetermined second test time of 90 seconds. After the second test time has elapsed, a second waiting time of 90 seconds is waited for in the following program point 80 before the control unit 2 detects the temperature in the oven as a second temperature in the following program point 90.
  • the control unit 2 compares at the following program point 100 whether the second temperature is within a second predetermined temperature range. If the query at program point 100 shows that the second temperature is outside the second temperature range, the program branches to program point 60. If the comparison at program point 100 shows that the second temperature is within the second temperature range, the program branches to program point 110.
  • control unit 2 switches on ring heater 7 for a third test time of 120 seconds. After the third test time has elapsed, a third waiting time of 60 seconds is waited for in the next program point 120 before the control unit 2 detects the temperature in the oven as the third temperature in the following program point 130. Control unit 2 then checks at program point 140 whether the third temperature is within a third predetermined temperature range. If the third temperature lies outside the third temperature range, the program branches to program point 60. If the query at program point 140 shows that the third temperature lies within the third temperature range, the program branches to program point 150.
  • control unit 2 switches on external grill device 8 for a predetermined fourth test time of 60 seconds. After the third test time has elapsed, the control unit 2 waits at the following program point 160 for a predetermined fourth waiting time of 60 seconds, in order to subsequently record the temperature in the oven as the fourth temperature at the following program point 170. The control unit 2 then checks at program point 180 whether the fourth temperature is in a predetermined fourth temperature range. If the comparison at program point 180 shows that the fourth temperature lies outside the predetermined fourth temperature range, the program branches to program point 60. If the comparison at program point 180 shows that the fourth temperature lies within the fourth temperature range, the program branches to program point 190.
  • control unit 2 switches on internal grilling device 9 for a predetermined fifth test time of 60 seconds. After the fifth test time has elapsed, the control device 2 waits for a predetermined fifth waiting time of 60 seconds at the next program point 200 before the control device 2 detects the temperature in the oven as the fifth temperature at the following program point 210. The control unit 2 then compares at the following program point 220 whether the fifth temperature is in a predetermined fifth temperature range. If this is not the case, the program branches to program point 60. However, if the comparison at program point 220 reveals that the fifth temperature is in the fifth temperature range, the program then branches to program point 230.
  • control unit 2 switches on the circulating air blower 10 for a predetermined sixth test time of 120 seconds. After the sixth test time, the control unit measures the temperature in the oven as the sixth temperature at program point 240. At the following program point 250, control unit 2 compares whether the sixth temperature is in a predetermined sixth temperature range. If this is not the case, the program branches to program item 60. If the query at program point 250 shows that the sixth temperature is within the sixth temperature range, the program branches to program point 260.
  • control unit 2 At program point 260, control unit 2 generates a signal which indicates that all checked devices for influencing the temperature are functioning correctly. This signal is output, for example, as an optical signal on a display field 13.
  • control unit 2 At program point 60, control unit 2 generates an error signal that is either stored in memory 3 and / or is output as an optical error signal via display field 13 and / or is output via interface 11.
  • temperature values that represent a lower limit or an upper limit for the temperature of the household appliance are used as comparison values instead of the temperature ranges. If the comparison reveals that the measured temperature is below or below the upper limit, an underperformance or overperformance of the device under test is recognized.
  • the values for the first, second, third, fourth, fifth, sixth test time and the values for the first, second, third, fourth, fifth waiting time and the values for the first, second, third, fourth, fifth, sixth temperature range are in Storage 3 filed.
  • the control unit 2 determines the temperature difference that is generated by operating the device for influencing the temperature and compares the generated temperature difference with a corresponding predetermined temperature range that is stored in the memory 3. In this way, a more precise check of the correct functioning of the devices is made possible, since temperature influences are filtered out of the environment. By using the temperature differences, more precise temperature ranges can be selected as comparison values, since deviations of the individual devices cannot add up.
  • the invention was described on the basis of the flow chart of FIGS. 2 and 3, in which several devices were checked successively for correct functioning.
  • the individual devices can also be checked independently of one another and individually. A different order of the devices during the check is also possible.
  • the devices are preferably checked at regular time intervals or as a function of predetermined operating states of the household appliance. For example, in the case of an oven, the program for checking the devices is started at the start of a pyrolysis operation.
  • the method according to the invention for checking the devices is started via a data input via the interface 11.
  • the interface 11 can be connected to a portable diagnostic device which is connected directly to the oven 1 or via an Internet connection to a customer service center that is remote and which carries out a remote diagnosis of the oven 1.
  • the temperature rise for this operating mode is compared with a stored comparison temperature rise and the method for checking the devices is started if the temperature rise deviates more than a predetermined value from the comparison temperature rise. In this way, a diagnosis of the household appliance is carried out immediately if a malfunction occurs. As a result, more precise information about the malfunction is obtained and / or emergency operation is started by a replacement device.
  • FIG. 4 shows a diagram in which a first temperature characteristic curve A is plotted over time t.
  • the time ranges in which the individual devices are operated or the control unit waits for the waiting times are shown along the time axis.
  • the waiting times are marked with a break in the illustration.
  • the time is plotted in minutes.
  • the first characteristic curve A represents the mean value of the temperature ranges which are used for the comparison with the measured temperature values.
  • the temperature ranges have predefined values of + 3 ° to 10 ° in relation to the first characteristic curve A. The deviations depend on the devices checked and were determined experimentally.
  • FIG. 4 A second characteristic curve B is shown in FIG. 4, which separates from the characteristic curve A at about the time ten minutes.
  • the second characteristic curve B represents the temperature development without an outer and inner grill device 8, 9 and without a circulating air blower 10.
  • a third characteristic curve C is shown, which separates from the first characteristic curve A at a point in time of approximately 11.5 minutes and represents the temperature development that occurs without an internal grill device 9.
  • a fourth characteristic curve D is shown, which separates from the first characteristic curve A at a point in time of thirteen minutes.
  • the fourth characteristic curve D describes the temperature development that occurs without switching on a circulating air blower 10.
  • the control unit 2 If the measured temperature of the oven differs from a predetermined value from the first characteristic curve A, the control unit 2 detects a malfunction. Depending on the operating state to which the deviation occurs, the control unit 2 also recognizes which device has a malfunction. This information can be displayed, stored or output via the interface 11.
  • the invention is not limited to the household appliance in the form of an oven specified in the exemplary embodiment described, but can be applied to all types of household appliances in which devices for heating or cooling a household appliance are used. For example, it can also be used on a stove top or a refrigerator.
  • the sequence in which the devices are checked one after the other can be selected by the person skilled in the art depending on the application.
  • the devices that cause a slight change in temperature are preferably checked first.
  • the permissible fluctuation range of the temperature which occurs during normal operation is also small.
  • the range of variation is also Temperature greater, so that a device with a small temperature change can have a smaller temperature change than the fluctuation range of a device with a large temperature change. It is therefore difficult to make a reliable statement about a device with a small temperature change if it is checked after a device with a large temperature change.
  • the values for the test times, the waiting times and the temperature ranges for the comparison with the measured temperature are selected and optimized individually by the specialist depending on the application and household appliance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour contrôler un dispositif servant à influer sur la température d'un four. Selon l'invention, des dispositifs servant à influer sur la température d'un four sont mis en marche pour une période prédéterminée, puis la température obtenue est comparée à une température de référence prédéterminée. Un signal d'erreur est émis en fonction du résultat de cette comparaison.
EP01965032A 2000-06-28 2001-06-25 Procede pour controler un dispositif servant a influer sur la temperature du compartiment de cuisson d'un four, et four correspondant Withdrawn EP1300050A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10031496 2000-06-28
DE10031496 2000-06-28
PCT/EP2001/007179 WO2002001917A1 (fr) 2000-06-28 2001-06-25 Procede pour controler un dispositif servant a influer sur la temperature du compartiment de cuisson d'un four, et four correspondant

Publications (1)

Publication Number Publication Date
EP1300050A1 true EP1300050A1 (fr) 2003-04-09

Family

ID=7647095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01965032A Withdrawn EP1300050A1 (fr) 2000-06-28 2001-06-25 Procede pour controler un dispositif servant a influer sur la temperature du compartiment de cuisson d'un four, et four correspondant

Country Status (4)

Country Link
US (1) US6737614B2 (fr)
EP (1) EP1300050A1 (fr)
AU (1) AU2001285776A1 (fr)
WO (1) WO2002001917A1 (fr)

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US7274007B2 (en) * 2003-09-25 2007-09-25 W.E.T. Automotive Systems Ltd. Control system for operating automotive vehicle components
US20050103466A1 (en) * 2003-11-19 2005-05-19 Landry Kenneth D. Refrigerator-oven
US8049142B2 (en) * 2007-03-27 2011-11-01 Electrolux Home Products, Inc. Convection preheat system and method for radiant baking
US8419434B2 (en) * 2008-04-15 2013-04-16 International Business Machines Corporation Interactive recipe preparation using interactive cooking device to communicate with kitchen appliances
US8323026B2 (en) * 2008-04-15 2012-12-04 International Business Machines Corporation Interactive recipe preparation using instructive device with integrated actuators to provide tactile feedback
US8419433B2 (en) * 2008-04-15 2013-04-16 International Business Machines Corporation Monitoring recipe preparation using interactive cooking device
US8342847B2 (en) * 2008-04-15 2013-01-01 International Business Machines Corporation Interactive recipe preparation instruction delivery to disabled indiviuals
US8992225B2 (en) 2008-04-15 2015-03-31 International Business Machines Corporation Monitoring recipe preparation using instructive device and generating an alert to provide feedback
DE102010002877B4 (de) * 2010-03-15 2017-11-23 BSH Hausgeräte GmbH Verfahren zum Betreiben eines Haushaltsgeräts und Haushaltsgerät
US11320151B2 (en) 2013-10-14 2022-05-03 MKN Maschinenfabrik Kurt Neubauer GmbH & Co. KG Method for self-testing and checking certain functions of a cooking appliance, and cooking appliance for carrying out said method
JP6415370B2 (ja) * 2015-03-27 2018-10-31 三菱電機株式会社 加熱調理器
DE102016116598B3 (de) * 2016-09-06 2017-11-16 Miele & Cie. Kg Verfahren und Computerprogramm zur Heizungssteuerung eines Haushaltgeräts über virtuelle Temperatur sowie entsprechendes Haushaltsgerät

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JPS5464844A (en) * 1977-11-01 1979-05-25 Matsushita Electric Ind Co Ltd Domestic heating apparatus
DE4111784A1 (de) * 1991-04-11 1992-10-15 Ego Elektro Blanc & Fischer Regler fuer elektrowaermegeraete
US5688422A (en) * 1995-04-28 1997-11-18 Henny Penny Corporation Programmable fan control method and apparatus for use in a food oven
US5723846A (en) 1995-07-11 1998-03-03 Technology Licensing Corporation Multiprobe intelligent diagnostic system for food-processing apparatus
DE19528980A1 (de) 1995-08-07 1997-02-13 Bosch Siemens Hausgeraete Verfahren zur Bestimmung und zur Anzeige der Restzeit eines Behandlungsprogramms in einem Haushaltgerät
US5711606A (en) 1995-10-27 1998-01-27 Technology Licensing Corporation Diagnostic system for a cooking appliance
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EP1062843B1 (fr) * 1999-01-13 2008-12-10 General Electric Company Four combine a energie rayonnante et micro-onde
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Also Published As

Publication number Publication date
US6737614B2 (en) 2004-05-18
AU2001285776A1 (en) 2002-01-08
WO2002001917A1 (fr) 2002-01-03
US20030094449A1 (en) 2003-05-22

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