EP1166016A1 - A device for terminating cooking and indicating status - Google Patents

A device for terminating cooking and indicating status

Info

Publication number
EP1166016A1
EP1166016A1 EP00909059A EP00909059A EP1166016A1 EP 1166016 A1 EP1166016 A1 EP 1166016A1 EP 00909059 A EP00909059 A EP 00909059A EP 00909059 A EP00909059 A EP 00909059A EP 1166016 A1 EP1166016 A1 EP 1166016A1
Authority
EP
European Patent Office
Prior art keywords
door
opening
oven
light
cooking
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.)
Granted
Application number
EP00909059A
Other languages
German (de)
French (fr)
Other versions
EP1166016B1 (en
Inventor
Christian Eskildsen
Laurent Jeanneteau
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Publication of EP1166016A1 publication Critical patent/EP1166016A1/en
Application granted granted Critical
Publication of EP1166016B1 publication Critical patent/EP1166016B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H05B6/6414—Aspects relating to the door of the microwave heating apparatus
    • 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
    • F24C15/008—Illumination for 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
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • 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

Definitions

  • N device for terminating cooking and indicating status.
  • the invention relates to a device for terminating cooking and indicating the status in an oven for the preparation of food comprising an oven cavity and an oven door.
  • Ovens which are set by a timer to a finishing time are well known and they exist in simple user-set versions or in more elaborate versions where the finishing time is calculated internally in the oven control circuitry, e.g. by measured parameters.
  • Simple ovens may be set to switch-off the power supply at the finishing time, and more elaborate ovens may calculate the remaining heat in the oven and perform the switching-off before the actual finishing time.
  • the parameters measures may be temperature, humidity or composition of fumes developed within the cavity, and advanced data processing may be used in order to determine the development of cooking in each particular instance.
  • the known methods are not suitable for all cooking/baking, in particular for food which is designed to be taken out of the hot cavity at the correct instant. In such cases, it is not a question of programming the oven to switch off but to programme the user to act, either at a given time or when a specific condition of done-ness has been established in the oven.
  • the reaction of a user - or the non-reaction, as the case may be - is an impredictable parameter, and hence known ovens do not give the impression of functioning properly at all times. Simply put, if the user forgets to take the food out of the oven at the correct time, it will be overcooked. There is hence a need to provide technical means to minimise the consequences of lack of user cooperation. There is a further need to communicate to the user by other means than the activation of a sounder, such as the ringing of a bell.
  • the primary opening of the door is only partial. This has the advantage of preserving child safety, preventing access to the escaping steam and fumes. Such a positive partial opening may be followed by a full opening after an optional cooling-ofF period.
  • the opening of the door is accompanied by a turning on of the oven cavity light. This provides a further indication of the action of the oven door, in that the presence of a cloud of steam will be advertised by light from behind.
  • the oven door and oven cavity light are linked such that any manual closure or opening of the oven door causes a gradual change in light intensity from full light to dark and from dark to full light respectively, whereas a cooking status triggered door operation causes a sudden light intensity change.
  • the user will perceive the calm and confident handling of the food by the automatic oven when operating it, while being rudely advertised of the finishing time by the instant presence of light and steam and fumes.
  • a further embodiment is particular in that the triggering of the door opening is obtained by means of signals from smoke detecting means. This has the added advantage that an erroneous adjustment of the cooking parameters at the initiation of cooking will not result in charred food, because the door opens and the oven switches off. As a minimum result of this provision, the need for cleaning of the cooking vessels and oven are simplified, and there is an increased chance of re- cooking and obtaining useful cooked food in spite of the original erroneous adjustment.
  • a further embodiment is particular in that the triggering of the door opening is obtained by means of signals representative of a reduction of the amount of steam developed over time This feature is food dependent and would represent e g cakes and bread
  • the fundamental aspect of the invention is the combination of creating a fast normalisation of the cooked food with advertising that it is finished This is brought about by the means defined in the claims
  • a further aspect is that of safety, in particular for children, when a kitchen appliance which stores a large amount of thermal energy, suddenly releases it Hence the provision of a gradual opening of the door in order to prevent children from obtaining direct access to large areas of hot surface
  • the triggeiing of the door release is obtained by a signal which represents that cooking has finished, and a number of signals may be used to this end
  • the door will not only be released, but it will be opened positively, i e by means of the release of energy stored in a spring or by means of a motor
  • the latter is the choice when the door is actually made like the front of a drawer which slides out from the oven
  • Fig 1 shows a spring-loaded door with a trigger device and two-stage opening
  • Fig. 2 shows the cavity light intensity as a function of time and closure, respectively opening, of the oven door in the cases that a manual operation is performed or a triggered operation
  • Fig 1 an oven door which is closed shut against a spring force as a storage device, or a motor creating a suitable resistance
  • the oven door 1 is closed against the cavity 2 when it is at 0° opening angle
  • the spring arrangement 3 acts on a lever 5 at the bottom of the door (however, many practical, similar embodiments are possible) in order to open it against the resistance of the dashpot 6
  • the oven door is indicated in 3 positions 0°, 15°, and fully open at 90°
  • the position of the door is linked to the level of light emitted by a suitably fitted lamp 7.
  • a blower is connected to the space S and may through openings 8 blow a stream of air along the oven door 1 to draw fumes out and to cool the door when it is in the limited opening position at 15°.
  • a humidity sensor 9 is connected to the control electronics 10 which in turn controls the blower and release means for the door C.
  • the light may be set to flash at an assureent rate, at least for the time that the oven door is only partly open, and changing for a stable light when the oven door is manually activated in order to remove the cooked food.
  • Fig. 2 shows in right-hand part of Fig. 2, in which it is seen that for the chosen opening angle of the oven door, in casu 15 °, the light flashes insistently until the time t ⁇ , whereupon it changes to normal combined opening and light change.
  • a blower fitted into the oven door drive compartment blows cooling air taking from outside the oven cavity over the inside of the door as well as carrying the smell of finished food into the living quarters.

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)
  • Electric Ovens (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

The end of cooking or baking in an oven may be determined by presets or by the measurement of suitable parameters. The end triggers an automatic opening of the door in order to advertise the status. The door opening may be combined with a sudden change in the strength of the cavity light when the operation is automatic, whereas manual closing and opening causes the light to fade out or in. A partial opening to signal end of cooking and venting is accompanied by flashes of light.

Description

N device for terminating cooking and indicating status.
The invention relates to a device for terminating cooking and indicating the status in an oven for the preparation of food comprising an oven cavity and an oven door.
Ovens which are set by a timer to a finishing time are well known and they exist in simple user-set versions or in more elaborate versions where the finishing time is calculated internally in the oven control circuitry, e.g. by measured parameters. Simple ovens may be set to switch-off the power supply at the finishing time, and more elaborate ovens may calculate the remaining heat in the oven and perform the switching-off before the actual finishing time. The parameters measures may be temperature, humidity or composition of fumes developed within the cavity, and advanced data processing may be used in order to determine the development of cooking in each particular instance.
The known methods are not suitable for all cooking/baking, in particular for food which is designed to be taken out of the hot cavity at the correct instant. In such cases, it is not a question of programming the oven to switch off but to programme the user to act, either at a given time or when a specific condition of done-ness has been established in the oven. The reaction of a user - or the non-reaction, as the case may be - is an impredictable parameter, and hence known ovens do not give the impression of functioning properly at all times. Simply put, if the user forgets to take the food out of the oven at the correct time, it will be overcooked. There is hence a need to provide technical means to minimise the consequences of lack of user cooperation. There is a further need to communicate to the user by other means than the activation of a sounder, such as the ringing of a bell.
It is the purpose of the invention to provide an oven in which the above disadvantages and limitations have been eliminated in an efficient and economic manner. This is obtained by letting the advent of the finishing time trigger the release of the oven door so that it opens positively. This measure will bring about either proper cooling, in case the contents have been forgotten by the user, or it will advertise the fact that the cooking has been finished, both visually in large-scale, and olfactory, because the opening which has a much larger cross section than ordinary vents, will provide full exit of steam and fumes.
In an advantageous embodiment the primary opening of the door is only partial. This has the advantage of preserving child safety, preventing access to the escaping steam and fumes. Such a positive partial opening may be followed by a full opening after an optional cooling-ofF period.
In a further advantageous embodiment the opening of the door is accompanied by a turning on of the oven cavity light. This provides a further indication of the action of the oven door, in that the presence of a cloud of steam will be advertised by light from behind.
In a further advantageous embodiment, the oven door and oven cavity light are linked such that any manual closure or opening of the oven door causes a gradual change in light intensity from full light to dark and from dark to full light respectively, whereas a cooking status triggered door operation causes a sudden light intensity change. The user will perceive the calm and confident handling of the food by the automatic oven when operating it, while being rudely advertised of the finishing time by the instant presence of light and steam and fumes.
A further embodiment is particular in that the triggering of the door opening is obtained by means of signals from smoke detecting means. This has the added advantage that an erroneous adjustment of the cooking parameters at the initiation of cooking will not result in charred food, because the door opens and the oven switches off. As a minimum result of this provision, the need for cleaning of the cooking vessels and oven are simplified, and there is an increased chance of re- cooking and obtaining useful cooked food in spite of the original erroneous adjustment. A further embodiment is particular in that the triggering of the door opening is obtained by means of signals representative of a reduction of the amount of steam developed over time This feature is food dependent and would represent e g cakes and bread
The fundamental aspect of the invention is the combination of creating a fast normalisation of the cooked food with advertising that it is finished This is brought about by the means defined in the claims A further aspect is that of safety, in particular for children, when a kitchen appliance which stores a large amount of thermal energy, suddenly releases it Hence the provision of a gradual opening of the door in order to prevent children from obtaining direct access to large areas of hot surface The triggeiing of the door release is obtained by a signal which represents that cooking has finished, and a number of signals may be used to this end The door will not only be released, but it will be opened positively, i e by means of the release of energy stored in a spring or by means of a motor The latter is the choice when the door is actually made like the front of a drawer which slides out from the oven
The invention will be described more fully in the following with reference to the drawings in which
Fig 1 shows a spring-loaded door with a trigger device and two-stage opening, and
Fig. 2 shows the cavity light intensity as a function of time and closure, respectively opening, of the oven door in the cases that a manual operation is performed or a triggered operation
In Fig 1 is shown an oven door which is closed shut against a spring force as a storage device, or a motor creating a suitable resistance The oven door 1 is closed against the cavity 2 when it is at 0° opening angle The spring arrangement 3 acts on a lever 5 at the bottom of the door (however, many practical, similar embodiments are possible) in order to open it against the resistance of the dashpot 6 The oven door is indicated in 3 positions 0°, 15°, and fully open at 90° The position of the door is linked to the level of light emitted by a suitably fitted lamp 7. A blower is connected to the space S and may through openings 8 blow a stream of air along the oven door 1 to draw fumes out and to cool the door when it is in the limited opening position at 15°. A humidity sensor 9 is connected to the control electronics 10 which in turn controls the blower and release means for the door C.
As shown in Fig. 2, upon closing the light in the cavity will gradually decrease, which is shown at the middle part of the graph (t3 - 14). If the oven is to be opened manually, this does not occur by pulling a handle, but by pushing a control button which is suitably linked to a catch C. The acutal opening does not occur until the light has increased gradually from zero (ti - 12), and then the door opens, driven by a spring force or a motor but at a slow speed commensurate with the perceived speed in increasing the light. This is shown in the left-hand part of the graph. A suitable combination of the two speeds which will be easily determined by the skilled person will create a sense of elegance, of luxuriousness, thereby adding value to the product. Similarly, the closing of the door does not need to be performed manually but may occur through motor drive in conjunction with the changing light level.
In case the door opens because a cooking operation has finished, it has been found expedient to make a decided contrast in the manner in which the light inside the cavity changes, i.e. to let the opening be accompanied by a sudden increase in light. Alternatively, the light may be set to flash at an insistent rate, at least for the time that the oven door is only partly open, and changing for a stable light when the oven door is manually activated in order to remove the cooked food. This is shown in right-hand part of Fig. 2, in which it is seen that for the chosen opening angle of the oven door, in casu 15 °, the light flashes insistently until the time tβ, whereupon it changes to normal combined opening and light change. During the time from t5 to ,6 a blower fitted into the oven door drive compartment blows cooling air taking from outside the oven cavity over the inside of the door as well as carrying the smell of finished food into the living quarters.
The skilled person will be able to devise any suitable combination of light and opening according to special needs.

Claims

PATENT CLAIMS
1. A device for terminating cooking and indicating the status in an oven for the preparation of food comprising an oven cavity and an oven door, characterised in that the advent of the finishing time triggers the release of the oven door so that it opens positively.
2. A device according to claim 1, characterised in that the primary opening of the door is only partial.
3. A device according to claim 1, characterised in that the opening of the door is accompanied by a turning on of the oven cavity light.
4. A device according to claim 1, characterised in that the oven door and oven cavity light are linked such that any manual closure or opening of the oven door causes a gradual change in light intensity from full light to dark and from dark to full light respectively, whereas a cooking status triggered door operation causes a sudden light intensity change.
5. A device according to claim 1, characterised in that the triggering of the door opening is obtained by means of signals from smoke detecting means.
6. A device according to claim 1, characterised in that the triggering of the door opening is obtained by means of signals representative of a reduction of the amount of steam developed over time.
7. A device according to any of the preceding claims, characterised in that the advent of finishing time releases the door to a limited opening which is less than full opening.
8. A device according to claim 7, characterised in that a blower blows air taking from outside the oven cavity over the inside of the door in order for it to exit through the limited opening.
EP00909059A 1999-03-04 2000-03-06 A device for terminating cooking and indicating status Expired - Lifetime EP1166016B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK31399 1999-03-04
DKPA199900313 1999-03-04
PCT/DK2000/000093 WO2000052392A1 (en) 1999-03-04 2000-03-06 A device for terminating cooking and indicating status

Publications (2)

Publication Number Publication Date
EP1166016A1 true EP1166016A1 (en) 2002-01-02
EP1166016B1 EP1166016B1 (en) 2004-06-09

Family

ID=8092151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00909059A Expired - Lifetime EP1166016B1 (en) 1999-03-04 2000-03-06 A device for terminating cooking and indicating status

Country Status (6)

Country Link
EP (1) EP1166016B1 (en)
AT (1) ATE268886T1 (en)
AU (1) AU3146900A (en)
DE (1) DE60011412T2 (en)
DK (1) DK1166016T3 (en)
WO (1) WO2000052392A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110251658A1 (en) * 2009-10-12 2011-10-13 Wellmike Enterprise Co., Ltd. Hair restoration caring device
EP1299678B2 (en) † 2000-06-29 2017-08-23 BSH Hausgeräte GmbH Oven

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10031667C5 (en) 2000-06-29 2007-02-15 BSH Bosch und Siemens Hausgeräte GmbH Oven with an oven lighting and method for controlling an oven lighting
DE10138885A1 (en) * 2001-08-08 2003-02-20 Bsh Bosch Siemens Hausgeraete Household appliance has capacitative door handle with control circuit capable of detecting the touch, to switch on internal lighting
DE10202492A1 (en) * 2002-01-23 2003-07-31 Bsh Bosch Siemens Hausgeraete oven
KR100556504B1 (en) 2002-12-18 2006-03-03 엘지전자 주식회사 Safety device of electric microwave oven
FR2850532B1 (en) * 2003-02-04 2006-02-03 Premark Feg Llc OVEN FOR COOKING FOODS COMPRISING MEANS FOR SIGNALING THE END OF A HEATING PROCESS
DE102004007122B4 (en) * 2004-02-12 2006-11-16 Miele & Cie. Kg Method for operating a cooking appliance
DE102005020744B3 (en) * 2005-05-02 2006-12-14 Rational Ag Method of carrying out a cooking process taking into account the degree to which an oven door or cover is open
DE102005038882A1 (en) * 2005-08-17 2007-02-22 BSH Bosch und Siemens Hausgeräte GmbH Cooking appliance
DE102005038881A1 (en) * 2005-08-17 2007-02-22 BSH Bosch und Siemens Hausgeräte GmbH Cooking appliance
DE102007029194A1 (en) * 2007-06-25 2009-01-08 BSH Bosch und Siemens Hausgeräte GmbH High-level cooking appliance
DE202007016255U1 (en) 2007-11-21 2008-04-30 Rational Ag Cooking appliance with automatic lighting adjustment
US20130320828A1 (en) * 2010-12-16 2013-12-05 Convotherm Elecktrogerate GmbH Cooking device, closure mechanism and door operating element for a cooking device, and kit
DE102010061339A1 (en) * 2010-12-20 2012-06-21 Miele & Cie. Kg Cooking appliance and method for operating a cooking appliance
DE102010061353A1 (en) * 2010-12-20 2012-06-21 Miele & Cie. Kg Cooking appliance and method for operating a cooking appliance
US20180087779A1 (en) * 2016-09-28 2018-03-29 Sandra Maldonado Oven with Automatic Racks and Door
JP7194983B2 (en) * 2018-11-30 2022-12-23 株式会社パロマ stove
WO2023140803A1 (en) * 2021-12-31 2023-07-27 Mamur Teknoloji Sistemleri San. A.S. Lighting control method for an oven

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ATE193085T1 (en) * 1995-01-05 2000-06-15 Werner Lautenschlaeger DEVICE FOR HEAT TREATING MATERIALS IN A HEATING CHAMBER
GB9511748D0 (en) * 1995-06-09 1995-08-02 Cobalt Systems Limited Oven
JPH0933051A (en) * 1995-07-19 1997-02-07 Sanyo Electric Co Ltd Microwave oven

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1299678B2 (en) † 2000-06-29 2017-08-23 BSH Hausgeräte GmbH Oven
US20110251658A1 (en) * 2009-10-12 2011-10-13 Wellmike Enterprise Co., Ltd. Hair restoration caring device
US8747446B2 (en) * 2009-10-12 2014-06-10 Chung-Yang Chen Hair restoration caring device

Also Published As

Publication number Publication date
EP1166016B1 (en) 2004-06-09
DK1166016T3 (en) 2004-10-11
AU3146900A (en) 2000-09-21
ATE268886T1 (en) 2004-06-15
DE60011412T2 (en) 2005-06-30
WO2000052392A1 (en) 2000-09-08
DE60011412D1 (en) 2004-07-15

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