EP2538143A1 - A method for controlling a heating-up period of an oven - Google Patents
A method for controlling a heating-up period of an oven Download PDFInfo
- Publication number
- EP2538143A1 EP2538143A1 EP12171605A EP12171605A EP2538143A1 EP 2538143 A1 EP2538143 A1 EP 2538143A1 EP 12171605 A EP12171605 A EP 12171605A EP 12171605 A EP12171605 A EP 12171605A EP 2538143 A1 EP2538143 A1 EP 2538143A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current
- duty cycle
- power
- maximum allowed
- phase
- 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.)
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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
- F24C7/087—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
- F24C7/08—Arrangement or mounting of control or safety devices
Definitions
- the present invention relates to a method for controlling a heating-up period of an oven. Further, the present invention relates to a system for controlling a heating-up period of an oven. Moreover, the present invention relates to an oven provided for performing said method and/or comprising the system mentioned above.
- the maximum allowed current for a 230 V power supply is limited. This results in a limited power. For example, in Switzerland the maximum allowed current for a 230 V power supply is limited to 10 A, so that the maximum power is 2300 W. The limitation of the current extends the heating-up period of the oven.
- the object of the present invention is achieved by the method according to claim 1.
- the present invention relates to a method for controlling a heating-up period of an oven, wherein
- the main idea of the present invention is the excess of the maximum allowed average current and power, respectively, for a certain time, and a subsequent undershooting of the maximum allowed average current and power, respectively, wherein the average current and/or average power do not exceed the maximum allowed average current and power, respectively.
- This method allows a reduction of the time for the heating-up period of the oven by about 30 %.
- the average current and/or the average power is equal or marginally smaller than the maximum allowed average current or maximum allowed average power, respectively, during the duty cycle.
- the average current and/or the average power may be equal or marginally smaller than the maximum allowed average current or maximum allowed average power, respectively, during the heating-up period.
- the upper current and/or the upper power exceed the maximum allowed average current or maximum allowed average power, respectively, by 30 % to 50 %, in particular by about 40 %.
- the lower current and/or the lower power is about 60 % to 90 % of the maximum allowed average current or maximum allowed average power, respectively, in particular about 75 %.
- the time of the first phase of the duty cycle is about 30 % to 45 % of the time of the duty cycle.
- the time of the second phase of the duty cycle may be about 55 % to 70 % of the time of the duty cycle.
- the upper current corresponds with a higher number of activated heating elements of the oven
- the lower current corresponds with a lower number of activated heating elements of the oven.
- the heating elements are switched in parallel
- the method is performed by an electronic control circuit.
- the method may be also performed by a computer program.
- the method may be performed by a combination of an electronic control circuit and a computer program.
- the present invention relates further to a system for controlling a heating-up period of an oven, wherein the system is provided for performing the method mentioned above.
- the present invention relates to an oven, in particular a cooking oven, wherein the oven is provided for the method described above and/or the oven comprises the system mentioned above.
- the present invention relates to a computer program product stored on a computer usable medium, comprising computer readable program means for causing a computer to perform a method mentioned above.
- FIG 1 illustrates a schematic diagram of a current I during a heating-up period of an oven as function of the time t according to a preferred embodiment of the present invention.
- the diagram shows a time slot of the beginning of the heating-up period. Said time slot takes about two minutes. Usually the heating-up period takes a time less than 10 minutes.
- the diagram illustrates three current levels.
- An upper current I U occurs, when two heating elements of the oven are activated.
- a lower current I L occurs, when only one of the heating elements of the oven is activated.
- the heating elements are switched in parallel.
- the upper current I U corresponds with a higher number of activated heating elements of the oven
- the lower current I L corresponds with a lower number of activated heating elements of the oven.
- An average current I A defines an average value of the upper current I U and the lower current I L , wherein the calculation of said average current I A is weighted by the time T U of the upper current I U and the time T L of the lower current I L .
- the current I alternates between the upper current I U and the lower current I L , so that the current I forms a rectangular signal.
- the heating-up period of the oven comprises a number of subsequent duty cycles.
- Each duty cycle includes one phase with the upper current I U and one phase with the lower current I L .
- the time T U of the upper current I U is about 18 s
- the time T L of the lower current I L is about 30 s.
- the time T DC of the duty cycle is about 48 s in this special example.
- the time T U of the upper current I U is about 38 % of the time T DC of the duty cycle.
- the time T L of the lower current I L is about 62 % of the time T DC of the duty cycle.
- the upper current I U is about 14 A
- the lower current I L is about 7.5 A
- the average current I A weighted by the times T U and T L of the upper current I U and lower current I L , respectively, is about 10 A.
- the heating-up period with said current values can be used, if a maximum average current of 10 A is allowed. For 38 % of the heating-up period the upper current I U of about 14 A exceeds the maximum allowed average current of 10 A. For 62 % of the heating-up period the lower current I L of about 7.5 A goes below the maximum allowed average current of 10 A.
- the average current I A corresponds with the maximum allowed average current of 10 A. In general, the average current I A may not exceed the maximum allowed average current.
- the upper current I U of about 14 A corresponds with an upper power P U of about 3220 W.
- the lower current I L of about 7.5 A corresponds with a lower power P L of about 1725 W.
- the average current I A of about 10 A corresponds with an average power P A of about 2300 W.
- the maximum allowed average current of 10 A corresponds with a maximum allowed average power of about 2300 W.
- the upper current I U or the upper power P U may exceed the maximum allowed average current or maximum allowed average power, respectively.
- the average current I A or the average power P A may not exceed the maximum allowed average current or maximum allowed average power, respectively. This method results in a decreased heating-up period of the oven.
- the upper current I U , the lower current I L , the upper power P U and the lower power P L are given by the electric properties of the heating elements of the oven and by the voltage of the power supply.
- the average current I A and the average power P A can be elected by the user, wherein the average current I A and the average power P A may not exceed the maximum allowed average current and maximum allowed average power, respectively.
- the time of one duty cycle T DC is given by the oven, wherein the user can optionally vary the time of one duty cycle T DC within a predetermined range.
- the method according to the present invention can be performed by an electronic control circuit. Further, the method according to the present invention can be performed by a computer program. At last, the method according to the present invention can be performed by a combination of an electronic control circuit and a computer program.
- the present invention can also be embedded in a computer program product which comprises all the features enabling the implementation of the method described herein. Further, when loaded in computer system, said computer program product is able to carry out these methods.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electric Stoves And Ranges (AREA)
Abstract
Description
- The present invention relates to a method for controlling a heating-up period of an oven. Further, the present invention relates to a system for controlling a heating-up period of an oven. Moreover, the present invention relates to an oven provided for performing said method and/or comprising the system mentioned above.
- In some countries the maximum allowed current for a 230 V power supply is limited. This results in a limited power. For example, in Switzerland the maximum allowed current for a 230 V power supply is limited to 10 A, so that the maximum power is 2300 W. The limitation of the current extends the heating-up period of the oven.
- It is an object of the present invention to provide a method for controlling the heating-up period of an oven, wherein the time for the heating-up period is minimized.
- The object of the present invention is achieved by the method according to claim 1.
- The present invention relates to a method for controlling a heating-up period of an oven, wherein
- the heating-up period of the oven comprises a number of subsequent duty cycles,
- each duty cycle includes a first phase with an upper current and an upper power and a second phase with a lower current and a lower power,
- the upper current and/or the upper power exceeds a maximum allowed average current or maximum allowed average power, respectively, during the first phase of the duty cycle,
- the lower current and/or the lower power goes below the maximum allowed average current or maximum allowed average power, respectively, during the second phase of the duty cycle,
- an average current and/or an average power goes below or equals the maximum allowed average current or maximum allowed average power, respectively, during the duty cycle, and
- the time of the first phase of the duty cycle is shorter than the time of the second phase of said duty cycle.
- The main idea of the present invention is the excess of the maximum allowed average current and power, respectively, for a certain time, and a subsequent undershooting of the maximum allowed average current and power, respectively, wherein the average current and/or average power do not exceed the maximum allowed average current and power, respectively. This method allows a reduction of the time for the heating-up period of the oven by about 30 %.
- Preferably, the average current and/or the average power is equal or marginally smaller than the maximum allowed average current or maximum allowed average power, respectively, during the duty cycle.
- Further, the average current and/or the average power may be equal or marginally smaller than the maximum allowed average current or maximum allowed average power, respectively, during the heating-up period.
- For example, the upper current and/or the upper power exceed the maximum allowed average current or maximum allowed average power, respectively, by 30 % to 50 %, in particular by about 40 %.
- In a similar way, the lower current and/or the lower power is about 60 % to 90 % of the maximum allowed average current or maximum allowed average power, respectively, in particular about 75 %.
- Preferably, the time of the first phase of the duty cycle is about 30 % to 45 % of the time of the duty cycle. Further, the time of the second phase of the duty cycle may be about 55 % to 70 % of the time of the duty cycle.
-
-
- For example, the upper current corresponds with a higher number of activated heating elements of the oven, and the lower current corresponds with a lower number of activated heating elements of the oven.
- Preferably, the heating elements are switched in parallel
- In particular, the method is performed by an electronic control circuit.
- The method may be also performed by a computer program.
- Moreover, the method may be performed by a combination of an electronic control circuit and a computer program.
- The present invention relates further to a system for controlling a heating-up period of an oven, wherein the system is provided for performing the method mentioned above.
- Additionally, the present invention relates to an oven, in particular a cooking oven, wherein the oven is provided for the method described above and/or the oven comprises the system mentioned above.
- At last, the present invention relates to a computer program product stored on a computer usable medium, comprising computer readable program means for causing a computer to perform a method mentioned above.
- Novel and inventive features of the present invention are set forth in the appended claims.
- The present invention will be described in further detail with reference to the drawing, in which
- FIG 1
- illustrates a schematic diagram of a current during a heating-up period of an oven as a function of the time according to a preferred embodiment of the present invention.
-
FIG 1 illustrates a schematic diagram of a current I during a heating-up period of an oven as function of the time t according to a preferred embodiment of the present invention. The diagram shows a time slot of the beginning of the heating-up period. Said time slot takes about two minutes. Usually the heating-up period takes a time less than 10 minutes. - The diagram illustrates three current levels. An upper current IU occurs, when two heating elements of the oven are activated. A lower current IL occurs, when only one of the heating elements of the oven is activated. The heating elements are switched in parallel. In general, the upper current IU corresponds with a higher number of activated heating elements of the oven, and the lower current IL corresponds with a lower number of activated heating elements of the oven. An average current IA defines an average value of the upper current IU and the lower current IL, wherein the calculation of said average current IA is weighted by the time TU of the upper current IU and the time TL of the lower current IL. The current I alternates between the upper current IU and the lower current IL, so that the current I forms a rectangular signal.
- The heating-up period of the oven comprises a number of subsequent duty cycles. Each duty cycle includes one phase with the upper current IU and one phase with the lower current IL. In this example, the time TU of the upper current IU is about 18 s, and the time TL of the lower current IL is about 30 s. Thus, the time TDC of the duty cycle is about 48 s in this special example. The time TU of the upper current IU is about 38 % of the time TDC of the duty cycle. The time TL of the lower current IL is about 62 % of the time TDC of the duty cycle.
- In this preferred embodiment, the upper current IU is about 14 A, and the lower current IL is about 7.5 A. Thus, the average current IA weighted by the times TU and TL of the upper current IU and lower current IL, respectively, is about 10 A. The heating-up period with said current values can be used, if a maximum average current of 10 A is allowed. For 38 % of the heating-up period the upper current IU of about 14 A exceeds the maximum allowed average current of 10 A. For 62 % of the heating-up period the lower current IL of about 7.5 A goes below the maximum allowed average current of 10 A. In this example, the average current IA corresponds with the maximum allowed average current of 10 A. In general, the average current IA may not exceed the maximum allowed average current.
- For a 230 V power supply the upper current IU of about 14 A corresponds with an upper power PU of about 3220 W. The lower current IL of about 7.5 A corresponds with a lower power PL of about 1725 W. The average current IA of about 10 A corresponds with an average power PA of about 2300 W. In a similar way, the maximum allowed average current of 10 A corresponds with a maximum allowed average power of about 2300 W.
- According to the present invention the upper current IU or the upper power PU may exceed the maximum allowed average current or maximum allowed average power, respectively. However, the average current IA or the average power PA may not exceed the maximum allowed average current or maximum allowed average power, respectively. This method results in a decreased heating-up period of the oven.
-
- The upper current IU, the lower current IL, the upper power PU and the lower power PL are given by the electric properties of the heating elements of the oven and by the voltage of the power supply. The average current IA and the average power PA can be elected by the user, wherein the average current IA and the average power PA may not exceed the maximum allowed average current and maximum allowed average power, respectively. The time of one duty cycle TDC is given by the oven, wherein the user can optionally vary the time of one duty cycle TDC within a predetermined range.
- The method according to the present invention can be performed by an electronic control circuit. Further, the method according to the present invention can be performed by a computer program. At last, the method according to the present invention can be performed by a combination of an electronic control circuit and a computer program.
- The present invention can also be embedded in a computer program product which comprises all the features enabling the implementation of the method described herein. Further, when loaded in computer system, said computer program product is able to carry out these methods.
- Although an illustrative embodiment of the present invention has been described herein with reference to the accompanying drawing, it is to be understood that the present invention is not limited to that precise embodiment, and that various other changes and modifications may be affected therein by one skilled in the art without departing from the scope or spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as defined by the appended claims.
-
- I
- current
- IU
- upper current
- IL
- lower current
- IA
- average current
- PU
- upper power
- PL
- lower power
- PA
- average power
- t
- time
- TU
- time of the upper current IU and upper power PU
- TL
- time of the lower current IL and lower power PL
- TDC
- time of one duty cycle
Claims (15)
- A method for controlling a heating-up period of an oven,
wherein- the heating-up period of the oven comprises a number of subsequent duty cycles,- each duty cycle includes a first phase with an upper current (IU) and an upper power (PU) and a second phase with a lower current (IL) and a lower power (PL),- the upper current (IU) and/or the upper power (PU) exceeds a maximum allowed average current or maximum allowed average power, respectively, during the first phase of the duty cycle,- the lower current (IL) and/or the lower power (PL) goes below the maximum allowed average current or maximum allowed average power, respectively, during the second phase of the duty cycle,- an average current (IA) and/or an average power (PA) goes below or equals the maximum allowed average current or maximum allowed average power, respectively, during the duty cycle, and- the time (TU) of the first phase of the duty cycle is shorter than the time (TL) of the second phase of said duty cycle. - The method according to claim 1,
characterized in, that
the average current (IA) and/or the average power (PA) is equal or marginally smaller than the maximum allowed average current or maximum allowed average power, respectively, during the duty cycle. - The method according to claim 1 or 2,
characterized in, that
the average current (IA) and/or the average power (PA) is equal or marginally smaller than the maximum allowed average current or maximum allowed average power, respectively, during the heating-up period. - The method according to any one of the preceding claims, characterized in, that
the upper current (IU) and/or the upper power (PU) exceeds the maximum allowed average current or maximum allowed average power, respectively, by 30 % to 50 %, in particular by about 40 %. - The method according to any one of the preceding claims, characterized in, that
the lower current (IL) and/or the lower power (PL) is about 60 % to 90 % of the maximum allowed average current or maximum allowed average power, respectively, in particular about 75 %. - The method according to any one of the preceding claims, characterized in, that
the time (TU) of the first phase of the duty cycle is about 30 % to 45 % of the time (TDC) of the duty cycle. - The method according to any one of the preceding claims, characterized in, that
the time (TL) of the second phase of the duty cycle is about 55 % to 70 % of the time (TDC) of the duty cycle. - The method according to any one of the preceding claims, characterized in, that
the time (TU) of the first phase of the duty cycle is determined by the equation
wherein TU is the time of the first phase of the duty cycle, TDC is the time of the duty cycle, PU is the upper power, PL is the lower power and PA is the average power. - The method according to any one of the preceding claims, characterized in, that
the time (TU) of the first phase of the duty cycle is determined by the equation
wherein TU is the time of the first phase of the duty cycle, TDC is the time of the duty cycle, IU is the upper current, IL is the lower current and IA is the average current. - The method according to any one of the preceding claims, characterized in, that
the upper current (IU) corresponds with a higher number of activated heating elements of the oven, and the lower current (IL) corresponds with a lower number of activated heating elements of the oven. - The method according to claim 10,
characterized in, that
the heating elements are switched in parallel. - The method according to any one of the preceding claims, characterized in, that
the method is performed by an electronic control circuit, or by a computer program, or by a combination of an electronic control circuit and a computer program. - A system for controlling a heating-up period of an oven, characterized in, that
the system is provided for performing the method according to any one of the claims 1 to 12. - An oven, in particular a cooking oven,
characterized in, that
the oven is provided for a method according to any one of the claims 1 to 12 and/or the oven comprises a system according to claim 13. - A computer program product stored on a computer usable medium, comprising computer readable program means for causing a computer to perform a method according to any one of the claims 1 to 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12171605.4A EP2538143B1 (en) | 2011-06-22 | 2012-06-12 | A method for controlling a heating-up period of an oven |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11005092A EP2538142A1 (en) | 2011-06-22 | 2011-06-22 | A method for controlling a heating-up period of cooking oven |
EP12171605.4A EP2538143B1 (en) | 2011-06-22 | 2012-06-12 | A method for controlling a heating-up period of an oven |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2538143A1 true EP2538143A1 (en) | 2012-12-26 |
EP2538143B1 EP2538143B1 (en) | 2018-09-12 |
Family
ID=44487051
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11005092A Withdrawn EP2538142A1 (en) | 2011-06-22 | 2011-06-22 | A method for controlling a heating-up period of cooking oven |
EP12171605.4A Not-in-force EP2538143B1 (en) | 2011-06-22 | 2012-06-12 | A method for controlling a heating-up period of an oven |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11005092A Withdrawn EP2538142A1 (en) | 2011-06-22 | 2011-06-22 | A method for controlling a heating-up period of cooking oven |
Country Status (1)
Country | Link |
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EP (2) | EP2538142A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2671882B1 (en) * | 2016-12-09 | 2019-04-02 | Bsh Electrodomesticos Espana Sa | COOKING APPARATUS DEVICE |
CN113985945B (en) * | 2021-11-18 | 2023-01-13 | 华帝股份有限公司 | Temperature control method and oven |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0279514A1 (en) * | 1987-01-26 | 1988-08-24 | Matsushita Electric Industrial Co., Ltd. | High frequency heating apparatus using inverter-type power supply |
GB2204427A (en) * | 1984-12-14 | 1988-11-09 | Sharp Kk | Control of heating appliance |
DE3815686A1 (en) * | 1988-05-07 | 1989-11-16 | Licentia Gmbh | Parboil method in particular in domestic induction-cooking appliances |
EP0645942A2 (en) * | 1993-09-28 | 1995-03-29 | Lg Electronics Inc. | Method for thawing food in microwave oven |
EP1160578A1 (en) * | 2000-05-31 | 2001-12-05 | Lucent Technologies Inc. | Method for standardizing a power detector |
EP1213542A2 (en) * | 2000-11-10 | 2002-06-12 | Aktiebolaget Electrolux | A controller for the energy uptake fo an oven |
US20050173401A1 (en) * | 2003-03-28 | 2005-08-11 | Bakanowski Stephen M. | Power management systems and methods |
EP2065648A1 (en) * | 2007-11-28 | 2009-06-03 | Electrolux Home Products Corporation N.V. | A method and an apparatus for controlling a cooking device, in particular an induction hob |
-
2011
- 2011-06-22 EP EP11005092A patent/EP2538142A1/en not_active Withdrawn
-
2012
- 2012-06-12 EP EP12171605.4A patent/EP2538143B1/en not_active Not-in-force
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2204427A (en) * | 1984-12-14 | 1988-11-09 | Sharp Kk | Control of heating appliance |
EP0279514A1 (en) * | 1987-01-26 | 1988-08-24 | Matsushita Electric Industrial Co., Ltd. | High frequency heating apparatus using inverter-type power supply |
DE3815686A1 (en) * | 1988-05-07 | 1989-11-16 | Licentia Gmbh | Parboil method in particular in domestic induction-cooking appliances |
EP0645942A2 (en) * | 1993-09-28 | 1995-03-29 | Lg Electronics Inc. | Method for thawing food in microwave oven |
EP1160578A1 (en) * | 2000-05-31 | 2001-12-05 | Lucent Technologies Inc. | Method for standardizing a power detector |
EP1213542A2 (en) * | 2000-11-10 | 2002-06-12 | Aktiebolaget Electrolux | A controller for the energy uptake fo an oven |
US20050173401A1 (en) * | 2003-03-28 | 2005-08-11 | Bakanowski Stephen M. | Power management systems and methods |
EP2065648A1 (en) * | 2007-11-28 | 2009-06-03 | Electrolux Home Products Corporation N.V. | A method and an apparatus for controlling a cooking device, in particular an induction hob |
Also Published As
Publication number | Publication date |
---|---|
EP2538142A1 (en) | 2012-12-26 |
EP2538143B1 (en) | 2018-09-12 |
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