EP2037178B1 - Sicherheitsvorrichtung und -verfahren für eine Arbeitsplatte - Google Patents

Sicherheitsvorrichtung und -verfahren für eine Arbeitsplatte Download PDF

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Publication number
EP2037178B1
EP2037178B1 EP08163992.4A EP08163992A EP2037178B1 EP 2037178 B1 EP2037178 B1 EP 2037178B1 EP 08163992 A EP08163992 A EP 08163992A EP 2037178 B1 EP2037178 B1 EP 2037178B1
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EP
European Patent Office
Prior art keywords
cooktop
hob
person
detecting
cooking
Prior art date
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Active
Application number
EP08163992.4A
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English (en)
French (fr)
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EP2037178A2 (de
EP2037178A3 (de
Inventor
Faustine Vanhulle
Régis Dando
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.)
Groupe Brandt SAS
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Groupe Brandt SAS
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Filing date
Publication date
Application filed by Groupe Brandt SAS filed Critical Groupe Brandt SAS
Publication of EP2037178A2 publication Critical patent/EP2037178A2/de
Publication of EP2037178A3 publication Critical patent/EP2037178A3/de
Application granted granted Critical
Publication of EP2037178B1 publication Critical patent/EP2037178B1/de
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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
    • 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
    • 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
    • F24C15/10—Tops, e.g. hot plates; Rings
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

Definitions

  • the present invention relates to a hob with a safety device against domestic accidents, especially those caused by a cooking vessel located on a cooking stove.
  • the document US 5,717,188 describes a cooktop having a safety device adapted to reduce the cooking power, when the cooking reaches a predetermined power and that no one approaches the hob for a period of time determined.
  • cooking the food is not optimal when the power is different from the desired cooking power.
  • One way to avoid accidents is to attach grills or nets to the edge of the cooktop to prevent access to the cooktop by a child as well as at the controls of the hob and the cooking vessels.
  • the present invention aims to solve the above limitations and to provide a hob comprising a safety device against accidents and a method associated with this hob, for detecting a risk situation.
  • the present invention aims in a first aspect, a hob having a cooking surface adapted to receive a cooking vessel on a cooking stove.
  • the hob comprises a safety device comprising means for detecting the passing of a portion of said cooking vessel beyond at least one free side of said hob, the detection means of the hob. overtaking comprising at least one sensor located along said at least one free side of the hob.
  • the risk situation when part of the cooking vessel exceeds the free edge of a hob is detected, and can be further processed.
  • the safety device comprises warning means adapted to indicate the passing of a portion of the cooking vessel beyond the at least one free side of the hob.
  • the user is notified when a risk situation caused by exceeding a portion of the cooking vessel beyond a free edge of a cooktop is present.
  • said at least one sensor located along the at least one free side of the hob is located between a cooking zone and said at least one free side of said hob.
  • this side is the free side or side in front of which the person stands to cook.
  • the safety device further comprises means for detecting the presence of a person in the vicinity of the hob, located under the plane of the cooking surface and arranged in a plane inclined with respect to the plane of said table. Cooking.
  • the angle of inclination of the inclined plane in which are arranged the means for detecting the presence of a person is substantially equal to 45 °.
  • the security device comprises timing means adapted to calculate the time elapsed since the time at which said means for detecting the presence of a person do not detect the presence of a person.
  • the present invention relates to a second aspect, a method against accidents, caused in particular by the attachment of a cooking vessel located on a cooking zone of a hob, the method being implemented in a cooking table.
  • cooking comprising a cooking surface adapted to receive a cooking vessel on a cooking stove, and a safety device comprising means for detecting the passing of a portion of the cooking vessel beyond at least one free side of the hob.
  • the method comprises a step of detecting the exceeding of a portion of the cooking vessel beyond at least one free side of the hob, the detection step being carried out by the means excess detection, the overflow detection means comprising at least one sensor located along said at least one free side of the hob.
  • the safety method includes a warning step when a portion of the cooking vessel protrudes beyond the at least one free side of the cooktop.
  • the user is warned of the presence of a risk situation and can avoid the attachment of the cooking vessel.
  • the security method further comprises a step of detecting the presence of a person near the hob, the detection step being implemented by means of detecting the presence of a person near the cooktop.
  • a warning step is implemented, if the exceeding of a portion of the cooking vessel beyond the at least one free side of the hob is detected and if the presence of a person to proximity to the hob is not detected for a predetermined period of time.
  • the safety device warns him of the presence of a risk situation.
  • the person being warned can put back the protruding portion of the cooking vessel inside the hob, thus avoiding the risk of a domestic accident.
  • the hob is adapted to implement the security method according to the invention.
  • the worktop 1 comprises a hob 2 here with four fireplaces 3.
  • the hob 2 has a cooking surface 2 'adapted to receive containers.
  • a cooking vessel 4 (for example a pan) is located on the cooking surface 2 ', on one of the four foci 3.
  • the number of fireplaces 3 of the hob 2 may have different values.
  • the cooking surface 2 corresponds to the entire surface of the hob 2.
  • This hob 2 is for example a glass-ceramic plate, with radiant heating means or induction.
  • the hob 2 comprises a safety device 5.
  • the safety device 5 is located under the plane of the hob 2.
  • the safety device 5 comprises means 6 for detecting the passing of part of the cooking vessel 4, beyond an edge 2a of the cooking table 2.
  • This edge 2a is the free edge of the cooking table. 2, or the one that is closest to a user 20 of the hob 2 and the one in front of which the user 20 is placed when he uses the hob 2.
  • the overflow detection means 6 detect when for example the handle 4 'of the pan 4 exceeds the free edge 2a or the edge closest to the user 20.
  • the overflow detection means 6 comprise several presence detection sensors 6, located for example in a straight line, over a length substantially equal to the length of the side of the hob 2 closest to the user 20.
  • Two consecutive presence detection sensors 6 are located at a distance such that all the situations in which the handle 4 'of the stove 4 exceeds the free edge 2a of the hob 2 are detected, thus avoiding blind spots.
  • the distance between two consecutive presence detection sensors 6 may belong to a range of values between 4 and 10 cm, and the detection cone of the sensors 6 has a half-angle of opening of 20 °.
  • the overflow detection sensors 6 are infrared or ultrasonic sensors.
  • the security device 5 further comprises means for detecting the presence 7 of a person 20.
  • These detection means 7 comprise at least one sensor 7 located substantially in the middle of the hob 2 in this embodiment.
  • the sensor 7 could be located at other positions in other embodiments.
  • the sensor 7 is located in a plane A inclined relative to the plane of the hob 2. Thus, by means of the sensor 7, it is possible to detect the presence of a person 20 in front of the hob 2.
  • the angle of inclination ⁇ of the plane A on which the sensor 7 is situated is defined according to the minimum size of the person 20 to be detected, for a height ht at which the given hob 2 is located.
  • the minimum size of a person to be detected may belong to a range of values between 130 and 150 cm.
  • the angle of inclination ⁇ of the plane A is thus calculated in order to detect a person with a minimum size of 140 cm for example near the table.
  • the presence sensor 7 may be a range finder.
  • the user of the cooktop 2 can be detected at a distance, for example, between 10 and 80 cm.
  • the distance between the user 20 and the hob can be measured. It is thus possible to know if the user 20 changes position or if the user 20 approaches the hob 2.
  • the presence sensor 7 then makes it possible to distinguish between a moving person and an obstacle present in front of the hob 2.
  • sensors such as for example an infrared radiation detection sensor emitted by the human body or an ultrasonic sensor.
  • the height ht at which the hob 2 is located is 80 cm
  • the depth p of the hob 2 is 60 cm
  • the user 20 shown on the figure 2 has a size greater than the minimum size h detected (140 cm) and is thus detected by the sensor 7.
  • the senor 7 has a detection cone with a half opening angle ⁇ which can be variable from one sensor model to another.
  • the detection cone of an infrared rangefinder 7 has a half-opening angle ⁇ of 5 °.
  • the angle of inclination ⁇ of the plane A when it is desired to detect the presence of a person of minimum size greater than 140 cm, the angle of inclination ⁇ of the plane A must be decreased. On the contrary, when it is desired to detect the presence of a person with a minimum size of less than 140 cm, the angle of inclination ⁇ of the plane A must be increased.
  • the angle of inclination ⁇ of the plane A thus varies according to the value of the opening half-angle ⁇ of the detection cone of the sensor 7 used, and also according to the distance dp at which it is desired to detect the presence of a nobody 20.
  • the detection means 7 are adapted to detect the presence of a hob. person of a minimum minimum size; and when the height ht increases, the detection means 7 are able to detect the presence of a person of a greater minimum size.
  • the angle of inclination ⁇ of the plane A on which the sensor 7 is located can be adjusted by adjustment means (not shown in the figure).
  • These adjustment means may be for example a worm, located under the glass-ceramic plate.
  • the user can choose the minimum height of detection of the presence of a person at a given distance from the table, once he has chosen the height at which he wants to install the hob 2.
  • the sensors 6, 7 are connected to an electronic control card which comprises a microprocessor or control unit 10, allowing, from the signals transmitted by the sensors 6, 7 and a processing algorithm which will be described below. , to detect the risk situations caused by the passing of a portion of a container 4 beyond a free side 2a of the hob 2.
  • the detection means 7 of the presence of a person 20 detect the presence or absence of a person 20 near the hob 2.
  • the presence detection means 7 of a person are adapted to detect the presence of a person of a minimum size.
  • the control unit 10 instructs the delay means 12 to start measuring the time. absence of a user 20 near the hob 2.
  • the control unit 10 gives the order to warning means 11 to warn the user 20 of the presence of a risk situation.
  • the predetermined period of time can be set by the user 20 of the hob 2.
  • the user sets by means of adjustment means of a timer (not shown in the figure), the period of time that it considers sufficient to go for example an ingredient or a kitchen utensil without causing the setting implement warning means, and at the same time short enough so that a child does not have time to approach the hob 2.
  • a timer not shown in the figure
  • the user can thus take into account his particular environment, for example, the size of his kitchen.
  • the predetermined period of time is three seconds.
  • control unit 10 gives the order to warn the user 20 of the hob 2 of this risk situation, and the means of warning 11 warn the person 20 of the presence of a risk situation.
  • the warning is an audible warning.
  • the safety device comprises audible warning means 11, to warn the user of the hob of the existence of a risk situation.
  • the warning can also be visual.
  • the control unit 10 gives the order to turn on a light emitting diode.
  • control unit 10 when the control unit 10 is informed of the passing of the handle, it gives the order to extinguish the hobs 3.
  • the warned user can deal with the risk situation, and thus avoid it.
  • the safety device in a situation such as that proposed by the invention is effective, practical as well as aesthetic.
  • means for detecting the overtaking of part of the cooking vessel can be installed along the lateral sides of the cooking appliance, and for example a stove.
  • means for detecting the overflow of a portion of the cooking vessel may be installed along its entire periphery.
  • the means for detecting the presence of a person are adapted to detect a person present at least in front of the front of the cooking appliance.
  • the user would be notified of the passing of part of the cooking vessel by one of the free sides of the cooking apparatus, in the absence of a user in front of the cooking appliance.
  • the presence detection means of a person may be adapted to detect a person on several or all sides of the cooking appliance.
  • the cooking surface could have different shapes, such as, for example, circular or oval.
  • the warning of exceeding a portion of a container beyond at least one free side of the surface can be implemented without being coupled to delay means depending on the presence or absence of a adult person near the cooktop.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Combinations Of Kitchen Furniture (AREA)
  • Baking, Grill, Roasting (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (11)

  1. Kochfeld (2) mit einer Kochfläche (2'), die dazu geeignet ist, ein Kochgefäß (4) auf einer Kochstelle (3) aufzunehmen, wobei das Feld (2) eine Sicherheitsvorrichtung (1) aufweist, dadurch gekennzeichnet, dass die Sicherheitsvorrichtung Mittel (6) zur Erfassung des Hinausragens eines Teils (4') des Kochgefäßes (4) über mindestens eine freie Seite (2a) des Kochfelds (2) hinaus aufweist, wobei die Mittel (6) zur Erfassung des Hinausragens mindestens einen Sensor (6) umfassen, der entlang der mindestens einen freien Seite (2a) des Kochfelds (2) angeordnet ist.
  2. Kochfeld nach Anspruch 1, dadurch gekennzeichnet, dass die Sicherheitsvorrichtung Warnmittel (11) aufweist, die dazu geeignet sind, das Hinausragen eines Teils (4') des Kochgefäßes (4) über die mindestens eine freie Seite (2a) des Kochfelds (2) hinaus anzugeben.
  3. Kochfeld nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der mindestens eine Sensor (6), der entlang der mindestens einen freien Seite (2a) des Kochfelds (2) angeordnet ist, zwischen einer Kochstelle (3) und der mindestens einen freien Seite (2a) des Kochfelds (2) angeordnet ist.
  4. Kochfeld nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Sicherheitsvorrichtung ferner Mittel (7) zur Erfassung der Anwesenheit einer Person (20) in der Nähe des Kochfelds (2) aufweist, die unter der Ebene der Kochfläche (2') liegen und in einer Ebene (A) angeordnet sind, die zur Ebene des Kochfelds (2) geneigt ist.
  5. Kochfeld nach Anspruch 4, dadurch gekennzeichnet, dass der Neigungswinkel (α) der geneigten Ebene (A), in der die Mittel (7) zur Erfassung der Anwesenheit einer Person (20) angeordnet sind, im Wesentlichen 45° beträgt.
  6. Kochfeld nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Sicherheitsvorrichtung Verzögerungsmittel (12) aufweist, die dazu geeignet sind, die Zeit zu berechnen, die ab dem Zeitpunkt, zu dem die Mittel (7) zur Erfassung der Anwesenheit einer Person (20) keine Anwesenheit einer Person (20) erfassen, abgelaufen ist.
  7. Kochfeld nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Mittel (7) zur Erfassung der Anwesenheit einer Person (20) einen Entfernungsmesser (7) umfassen.
  8. Verfahren zur Sicherheit gegen Unfälle, die insbesondere durch das Hängenbleiben an einem auf einer Kochstelle (3) eines Kochfelds (2) angeordneten Kochgefäß (4) hervorgerufen werden, wobei das Verfahren bei einem Kochfeld (2) ausgeführt wird, das eine Kochfläche (2') aufweist, die dazu geeignet ist, ein Kochgefäß (4) auf einer Kochstelle (3) aufzunehmen, sowie eine Sicherheitsvorrichtung, die Mittel (6) zur Erfassung des Hinausragens eines Teils (4') des Kochgefäßes (4) über mindestens eine freie Seite (2a) des Kochfelds (2) hinaus aufweist, wobei das Verfahren einen Schritt zur Erfassung des Hinausragens eines Teils (4') des Kochgefäßes (4) über mindestens eine freie Seite (2a) des Kochfelds (2) hinaus umfasst, der Erfassungsschritt von den Mitteln (6) zur Erfassung des Hinausragens ausgeführt wird und die Mittel (6) zur Erfassung des Hinausragens mindestens einen Sensor (6) umfassen, der entlang der mindestens einen freien Seite (2a) des Kochfelds (2) angeordnet ist.
  9. Sicherheitsverfahren nach Anspruch 8, dadurch gekennzeichnet, dass es einen Warnschritt umfasst, wenn ein Teil (4') des Kochgefäßes (4) über die mindestens eine freie Seite (2a) des Kochfelds (2) hinausragt.
  10. Sicherheitsverfahren nach einem der Ansprüche 8 oder 9, wobei die Sicherheitsvorrichtung ferner Mittel (7) zur Erfassung der Anwesenheit einer Person (20) in der Nähe des Kochfelds (2) aufweist, wobei das Verfahren dadurch gekennzeichnet ist, dass es ferner einen Schritt zur Erfassung der Anwesenheit einer Person (20) in der Nähe des Kochfelds (2) umfasst, wobei der Erfassungsschritt von den Mitteln (7) zur Erfassung einer Person (20) in der Nähe des Kochfelds (2) ausgeführt wird.
  11. Sicherheitsverfahren nach Anspruch 10, dadurch gekennzeichnet, dass ein Warnschritt ausgeführt wird, wenn das Hinausragen eines Teils (4') des Kochgefäßes (4) über die mindestens eine freie Seite (2a) des Kochfelds (2) hinaus erfasst wird und wenn während eines vorbestimmten Zeitraums die Anwesenheit einer Person (20) in der Nähe des Kochfelds (2) nicht erfasst wird.
EP08163992.4A 2007-09-17 2008-09-09 Sicherheitsvorrichtung und -verfahren für eine Arbeitsplatte Active EP2037178B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0757634A FR2921147B1 (fr) 2007-09-17 2007-09-17 Dispositif et procede de securite pour un plan de travail

Publications (3)

Publication Number Publication Date
EP2037178A2 EP2037178A2 (de) 2009-03-18
EP2037178A3 EP2037178A3 (de) 2009-11-18
EP2037178B1 true EP2037178B1 (de) 2016-02-24

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EP08163992.4A Active EP2037178B1 (de) 2007-09-17 2008-09-09 Sicherheitsvorrichtung und -verfahren für eine Arbeitsplatte

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EP (1) EP2037178B1 (de)
ES (1) ES2570377T3 (de)
FR (1) FR2921147B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2775211A1 (de) 2013-03-08 2014-09-10 Electrolux Appliances Aktiebolag Verfahren zum Betrieb eines Haushaltskochfeldes, Steuerungseinheit und Haushaltsgerät
DE102017223674A1 (de) * 2017-12-22 2019-06-27 BSH Hausgeräte GmbH Gargerät und Verfahren zum Betreiben desselben

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1243760B (it) * 1989-11-17 1994-06-23 Eurodomestici Ind Riunite Dispositivo atto a rilevare la presenza in un contenitore di cottura per alimento posto su un piano di cottura, ad esempio in vetro ceramica.
US5717188A (en) 1995-06-12 1998-02-10 Vaillancourt; Alain Safety device for a heating appliance
DE10207183B4 (de) * 2002-02-21 2008-04-10 Electrolux Home Products Corporation N.V. Kochfeld
US20050109333A1 (en) * 2003-11-21 2005-05-26 Thomas Lowell R. Safety device for regulating electrical power to a cooking appliance

Also Published As

Publication number Publication date
FR2921147A1 (fr) 2009-03-20
EP2037178A2 (de) 2009-03-18
EP2037178A3 (de) 2009-11-18
ES2570377T3 (es) 2016-05-18
FR2921147B1 (fr) 2014-12-12

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