EP2009958A2 - Procédé de préchauffage de four à micro-ondes - Google Patents

Procédé de préchauffage de four à micro-ondes Download PDF

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Publication number
EP2009958A2
EP2009958A2 EP08158882A EP08158882A EP2009958A2 EP 2009958 A2 EP2009958 A2 EP 2009958A2 EP 08158882 A EP08158882 A EP 08158882A EP 08158882 A EP08158882 A EP 08158882A EP 2009958 A2 EP2009958 A2 EP 2009958A2
Authority
EP
European Patent Office
Prior art keywords
preheating
temperature
cooking
preheating temperature
microwave 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.)
Withdrawn
Application number
EP08158882A
Other languages
German (de)
English (en)
Other versions
EP2009958A3 (fr
Inventor
Yong Soo Shin
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.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
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 Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Publication of EP2009958A2 publication Critical patent/EP2009958A2/fr
Publication of EP2009958A3 publication Critical patent/EP2009958A3/fr
Withdrawn legal-status Critical Current

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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
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H05B6/687—Circuits for monitoring or control for cooking
    • 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
    • F24C7/087—Arrangement or mounting of control or safety devices of electric circuits regulating heat
    • 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
    • F24C7/04—Stoves or ranges heated by electric energy with heat radiated directly from the heating element
    • F24C7/046—Ranges
    • 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
    • H05B6/66—Circuits
    • H05B6/662—Aspects related to the boost transformer of the microwave heating apparatus
    • 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
    • H05B6/66—Circuits
    • H05B6/666—Safety circuits

Definitions

  • the present invention relates to a method of preheating a microwave oven, and more particularly to a method of preheating a multi-function microwave oven that can eliminate odor due to previous cooking during a preheating operation, reduce cooking duration through a rapid preheating operation, and can display time for maintaining a preheating temperature before a cooking operation such that a user can control the preheating temperature while checking the displayed time.
  • heating devices there is a container that directly contacts a heating source. In this case, items to be cooked are placed in the container and then heated for cooking.
  • microwave oven employing microwaves as a heating source.
  • the microwave oven uses electricity to generate and radiate microwaves to an item to be cooked, oscillating molecules therein. Oscillation of the molecules in the item causes heating thereof.
  • a microwave oven is a kitchen device that irradiates an item to be cooked with high-frequency waves emitted from a magnetron, and heats both an interior and exterior of the item.
  • the microwave oven is widely used since it has advantages of sharply reducing a cooking duration due to high thermal efficiency thereof; reducing nutritive loss while cooking, thawing, and warming food; and cooking the food directly within a storage container.
  • a single-function microwave oven has been recently proposed that cooks food with 2450 MHz microwaves emitted by the magnetron.
  • examples of a multi-function microwave oven employing other functions in addition to the microwave-based heating function include a grill-type microwave oven having a grill function with grill heaters provided at upper and lower sides of a cooking chamber, a convection-type microwave oven having an oven function with a convection fan for convection of hot air, etc.
  • Fig. 1 is a block diagram schematically illustrating a typical multi-function microwave oven.
  • the multi-function microwave oven includes a key input unit 10 through which a cooking signal is input, a power supply 20 to supply power, a timer 30 to measure cooking duration, a temperature sensor 40 to detect an internal temperature of a cooking chamber, a grill heater 60 to supply thermal energy to a grill, a convection heater 70 to supply thermal energy to the interior of the cooking chamber, a convection motor 80 to provide power for driving a fan to distribute heat uniformly throughout the cooking chamber, a cooling fan motor 90 to cool an electric component chamber and the cooking chamber, a controller 50 to control the microwave oven in response to a cooking signal input through the key input unit 10, and a display unit 100 to display a control state of a controller 50 and an operation state of the microwave oven.
  • a cooking duration and a cooking temperature are input through the key input unit 10. Then, a cooking signal is transferred to the controller 50, which in turn controls the convection heater 70, grill heater 60, convection motor 80, and cooling fan motor 90 in response to the cooking signal to cook food in the cooking chamber while monitoring the internal temperature of the cooking chamber through the temperature sensor 40. At this time, the operation state of the microwave oven is displayed on the display unit 100.
  • the multi-function microwave oven is operated with an oven function and a cooking target is directly cooked inside the cooking chamber without a preheating operation, it takes a great deal of time to reach a proper temperature, which increases a total cooking duration and causes unsatisfactory cooking of the cooking target due to excessive water loss of the cooking target. Accordingly, it is necessary to perform the preheating operation for adjusting the internal temperature of the cooking chamber to a preset preheating temperature.
  • the preheating temperature After reaching the preheating temperature through the preheating operation, the preheating temperature must be maintained for a predetermined duration, and the preheating operation is stopped if the cooking operation is not performed.
  • the microwave oven assumes a cooking target has been placed therein to start a substantial cooking operation, and stops the preheating operation.
  • the microwave oven stops the preheating operation and does not perform any operation for maintaining the preheating temperature, thereby lowering the preheating temperature. Accordingly, when the user starts to perform the substantial cooking, the preheating operation must be performed again or the cooking may not be normally performed.
  • a previous cooking odor may remain in the multi-function microwave oven.
  • the previous cooking odor can affect newly cooked food.
  • the present invention is conceived to solve the problems of the conventional techniques as described above, and an aspect of the present invention is to provide a method of preheating a microwave oven, e.g. a multi-function microwave oven, that can eliminate odor due to previous cooking during a preheating operation, reduce cooking duration through a rapid preheating operation, and can display time for maintaining a preheating temperature before a cooking operation such that a user can control the preheating temperature while checking the displayed time.
  • a microwave oven e.g. a multi-function microwave oven
  • a method of preheating a microwave oven includes: driving a cooling fan motor for a predetermined preheating duration if a preheating operation is performed by setting a preheating temperature and inputting a preheating signal; determining whether an internal temperature of a cooking chamber reaches the preheating temperature, while continuously driving all available heaters of the microwave oven; and maintaining the preheating temperature for a preheating temperature maintaining duration by driving the cooling fan motor while selectively driving the available heaters, if the internal temperature reaches the preheating temperature.
  • the available heaters may include a grill heater and a convection heater.
  • the determination as to whether the internal temperature reaches the preheating temperature may include stopping the preheating operation if the internal temperature does not reach the preheating temperature even when the predetermined preheating time has elapsed.
  • the cooling fan motor may be driven with a lapse of a predetermined time after the internal temperature has reached the preheating temperature.
  • the convection motor may be driven when the cooling fan motor is driven.
  • the method may further include displaying a remaining preheating temperature maintaining duration, while maintaining the preheating temperature.
  • the method may further include performing an operation corresponding to a cooking key, if the cooking key is input in the maintaining of the preheating temperature.
  • the cooling fan is initially operated to ventilate the cooking chamber and then all available heaters are continuously driven so that the internal temperature of the cooking chamber can rapidly reach the preheating temperature, thereby reducing the total cooking duration. Further, while the preheating temperature is maintained, the preheating operation is stopped only by input of the cooking key, thereby preventing the preheating operation from stopping due to opening and closing of the door.
  • Fig. 2 is a flowchart of a method of preheating a microwave oven according to one embodiment of the present invention.
  • a preheating temperature is set for a preheating operation, and then, the preheating operation is performed in response to a preheating signal input through a key input unit 10.
  • a cooling fan motor 90 is first driven for a predetermined preheating duration to ventilate a cooking chamber such that a previous cooking odor can be eliminated.
  • the cooking chamber is controlled to have an internal temperature equal to an external temperature in order to allow various elements such as a temperature sensor to efficiently operate for achieving a stable control operation, in S10.
  • all available heaters such as a grill heater 60 and a convection heater 70 are continuously driven until the internal temperature of the cooking chamber reaches the preset preheating temperature so as to rapidly reach the preheating temperature in S12.
  • the cooling fan motor 90 is in a suspended state after operation for the predetermined duration.
  • the available heater is continuously driven until the internal temperature reaches the preheating temperature.
  • the cooling fan motor 90 When the internal temperature of the cooking chamber reaches the preset preheating temperature by driving the total available heaters, the cooling fan motor 90 is driven and the available heaters are selectively driven to maintain the preheating temperature.
  • a convection motor 80 When driving the cooling fan motor 90, a convection motor 80 may be driven together with the cooling fan motor 90 in S 18.
  • a driving time for the cooling fan motor 90 is delayed for a certain time to prevent the internal temperature from being sharply lowered from the preheating temperature if the cooling fan motor 90 is suddenly driven. Accordingly, when the internal temperature is raised above the preheating temperature by a certain temperature, the cooling fan motor 90 is driven to maintain the preheating temperature for a preheating temperature maintaining duration.
  • a remaining preheating temperature maintaining duration is displayed such that a user can check the remaining preheating temperature maintaining duration, in S22.
  • stopping the preheating operation during the preheating temperature maintaining duration depends only on the determination as to whether the cooking key has been input. Accordingly, if the door is opened and closed without any input of the cooking key, the preheating operation is performed to continuously maintain the preheating temperature for the preheating temperature maintaining duration.
  • Fig. 3 is a graph of an internal temperature of a cooking chamber during a preheating operation according to one embodiment of the present invention.
  • the cooling fan motor 90 is initially driven for a predetermined preheating duration so that the internal temperature of the cooking chamber becomes equal to the external temperature. Then, the available heaters are continuously operated to rapidly raise the internal temperature. When the internal temperature reaches the preheating temperature, the available heaters are selectively controlled while continuously driving the cooling fan motor 90, thereby stably maintaining the preheating temperature at an average of 230°C.
  • an inner state of the cooking chamber and an operating state of a temperature sensor are more stably maintained by continuously driving the cooling fan motor 90 than by intermittently driving the cooling fan motor 90, so that a stable control can be performed while maintaining the preheating temperature.
  • the multi-function microwave oven when performing a preheating operation, the multi-function microwave oven initially operates a cooling fan not only to ventilate a cooking chamber to eliminate a previous cooking odor, but also to control the cooking chamber to have an internal temperature equal to an external temperature, thereby smoothly operating various components such as the temperature sensor to achieve a stable control operation.
  • all available heaters are continuously driven during a preheating operation without operating a cooling fan motor, so that the internal temperature of the cooking chamber can rapidly reach the preheating temperature, reducing the total cooking duration.
  • the preheating operation is prevented from stopping due to opening and closing of the door, thereby enhancing user convenience.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Ovens (AREA)
  • Electric Stoves And Ranges (AREA)
EP08158882A 2007-06-25 2008-06-24 Procédé de préchauffage de four à micro-ondes Withdrawn EP2009958A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070062032A KR20080113493A (ko) 2007-06-25 2007-06-25 전자레인지의 예열 방법

Publications (2)

Publication Number Publication Date
EP2009958A2 true EP2009958A2 (fr) 2008-12-31
EP2009958A3 EP2009958A3 (fr) 2011-03-30

Family

ID=39832335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08158882A Withdrawn EP2009958A3 (fr) 2007-06-25 2008-06-24 Procédé de préchauffage de four à micro-ondes

Country Status (2)

Country Link
EP (1) EP2009958A3 (fr)
KR (1) KR20080113493A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9689576B2 (en) 2014-10-14 2017-06-27 Haier Us Appliance Solutions, Inc. Oven appliance and a method for operating an oven appliance
US9927127B2 (en) 2014-10-14 2018-03-27 Haier Us Appliance Solutions, Inc. Oven appliance and a method for operating an oven appliance
CN108710392A (zh) * 2018-04-26 2018-10-26 广东美的厨房电器制造有限公司 烤箱预热控制方法、装置及计算机可读存储介质

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7009147B1 (en) * 2005-01-12 2006-03-07 Maytag Corporation Operational modes for a cooking appliance employing combination cooking technology

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9689576B2 (en) 2014-10-14 2017-06-27 Haier Us Appliance Solutions, Inc. Oven appliance and a method for operating an oven appliance
US9927127B2 (en) 2014-10-14 2018-03-27 Haier Us Appliance Solutions, Inc. Oven appliance and a method for operating an oven appliance
CN108710392A (zh) * 2018-04-26 2018-10-26 广东美的厨房电器制造有限公司 烤箱预热控制方法、装置及计算机可读存储介质

Also Published As

Publication number Publication date
EP2009958A3 (fr) 2011-03-30
KR20080113493A (ko) 2008-12-31

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