WO2021086279A1 - A power control method for electric hob - Google Patents

A power control method for electric hob Download PDF

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Publication number
WO2021086279A1
WO2021086279A1 PCT/TR2019/050917 TR2019050917W WO2021086279A1 WO 2021086279 A1 WO2021086279 A1 WO 2021086279A1 TR 2019050917 W TR2019050917 W TR 2019050917W WO 2021086279 A1 WO2021086279 A1 WO 2021086279A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric heater
processor
switching period
electric
power
Prior art date
Application number
PCT/TR2019/050917
Other languages
French (fr)
Inventor
Metin OZTURK
Enes BAYRAM
Faruk TAS
Fatih ZUNGOR
Original Assignee
Mamur Teknoloji Sistemleri San. A.S.
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 Mamur Teknoloji Sistemleri San. A.S. filed Critical Mamur Teknoloji Sistemleri San. A.S.
Priority to PCT/TR2019/050917 priority Critical patent/WO2021086279A1/en
Priority to EP19951125.4A priority patent/EP4035502A4/en
Publication of WO2021086279A1 publication Critical patent/WO2021086279A1/en

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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H05B1/0266—Cooktops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/083—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on tops, hot plates
    • 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

Definitions

  • the present invention relates to hobs with multiple heater whose power consumption is adjusted by an electronic control unit.
  • New generation kitchen designs require the collective use of a built-in hob, oven and hood.
  • Built-in electric hobs are generally designed as 30cm, 60cm, 80cm and 90cm.
  • electric hobs designed as 60cm, 80cm and 90cm need at least two-phase electricity network.
  • KR20160095784 discloses an algorithm in which other heaters are forced to consume low power in order to maintain the power level of a preferred high priority heater selected according to a priority information among heaters if the power consumption exceeds an allowable value in hobs with a large number of heaters.
  • the object of the invention is to provide a simple power control algorithm that enables to limit the maximum power consumption by keeping performance loss at minimum in electric hobs.
  • invention relates a power control method for an electric hob comprising a first electric heater and at least one second electric heater provided on a panel and having a predetermined power level value for each presetting; an electronic control unit is driving periodically the first electric heater and/or the second electric heater such that activating at a predetermined normal switching period by directing mains current supplied from an electrical connection; a processor on the electronic control unit and an input unit provided for setting the input of preferred level setting of the first electric heater or the second electric heater, and a memory unit is storing the normal switching period data corresponding to each level setting on the electronic control unit with the processor connected to each other in signal transmitting manner.
  • the power control method further comprising the operation steps of reading the activation signal by the processor of the first electric heater and the second electric heater from the input unit; driving the first electric heater and the second electric heater by processor such that when the sum of the instantaneous power value of the first electric heater and the second electric heater for the selected level is greater than a predetermined safe threshold power value enabling a safety mode to change normal switching period to reduced switching period stored in the memory unit so as to keep the total instantaneous power consumption value of the first electric heater and the second electric heater smaller or equal to the threshold power value.
  • the maximum instantaneous power value determined by the standards is stored in the memory unit as the threshold power value and the total instantaneous power consumption demand according to the number and step of the heater operated by the user is in the configuration to exceed the threshold power value, the process switches to safety mode and allows the average power value to be obtained, which is requested by keeping all the heaters on with the algorithm it operates here.
  • the threshold power value even if the threshold power value is exceeded, the desired day value in many different configurations can be fully achieved and the power losses limited to the maximum uses are minimized.
  • the reduced switching period in the memory unit by the processor is set as half of the normal switching period for each level setting of the input unit without changing its on time.
  • the processor simply switches the corresponding heater on the basis of half of the normal switching period information contained in the memory, i.e. turns it on and off. The turn on time does not change, but its frequency increases. In this case, both the total desired power average is provided and the instantaneous power consumption value can be limited.
  • a third electric heater and/or a fourth electric heater is provided on the panel, and the electronic control unit is configured to switch on up to two heaters sequentially at the same time in reduced switching period in safety mode.
  • the limitation of having two heaters on at the same time reduces complexity and allows the processor to manage power with less computation.
  • the total threshold power value stored in the memory unit is determined between 3000 W and 3800 W; when the highest level setting is made from the input unit, each of the electric heaters is essentially set to 900 W with the help of the processor, and the processor reduces the normal switching period selected between 38- 52 seconds to half such that only two electric heaters are activated at the same time. In this way, even in a scenario where the maximum power consumption, that is, all four heaters are switched on at the highest grade, the maximum daily consumption value determined by the standards in single-phase use is not exceeded.
  • each of the electric heaters is adjusted to 54 W power with the help of the processor; the processor reduces the normal switching period from 47 seconds to 23.5 seconds without changing the 1 .4 second on time such that only two electric heaters are on at the same time. In this way, with an heater switched on with single-phase use in accordance with the standards, it is possible to operate without loss of power or to be at the minimum in case of setting the other heaters to the higher grade.
  • the processor reads the activation of the first electric heater and the second electric heater from the input unit; it determines the first electric heater and the second electric heater grade value and compares it with the threshold power value by calculating the corresponding total instantaneous power consumption value from the memory unit according to the grade value.
  • the first electric heater and the second electric heater comprise electrical resistance.
  • the first electric heater and the second electric heater comprise electrical resistance.
  • Figure 1 is a schematic top view of a four-heater hob which performs the inventive control method. DETAILED DESCRIPTION OF THE INVENTION
  • a hob with an electric four-heater vitro-ceramic panel (1) is shown schematically from the top.
  • a first electric heater (10), a second electric heater (20), a third electric heater (30) and a fourth electric heater (40) are mounted spaced each other, respectively.
  • Each electric heater (10, 20, 30, 40) has a spiral resistance and the mains current supplied from an electrical network is transferred to the heaters (10, 20, 30, 40) in a controlled and selective manner by an electrical connection (60).
  • Electrical connection (60) provides a single-phase input.
  • the electrical connection (60) is connected to a mains input limited to 15 A.
  • the processor switches to safety mode and allows the power control algorithm to reduce all switching periods by half.
  • the processor (52) will first switch on the first electric heater (10) and the second electric heater (20) at 23.5 seconds as the reduced switching period, and then it switches on the third electric heater (30) and the fourth electric heater (40) again for 23.5 seconds such that it provides 900W instant power consumption for each.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Central Heating Systems (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

The invention is power control method for an electric hob comprising a first electric heater (10) and at least one second electric heater (20) provided on a panel (1); an electronic control unit (50); a processor (52) and an input unit (52) where level setting input is provided, which are connected to each other for signal transmission, and a memory unit (56) that stores the normal switching period data corresponding to each level setting. The power control method includes the operation steps of reading activation signal by the processor (52) of the first electric heater (10) and the second electric heater (20) from the input unit (54); activating a safety mode when the sum of the instantaneous power value of the first electric heater (10) and the second electric heater (20) for the stage is greater than a predetermined safe threshold power value, replacing the normal switching period to a reduced switching period stored in the memory unit (56), such that the total instantaneous power consumption value of the first electric heater (10) and the second electric heater (20) remains smaller or equal to the threshold power value, and drives the first electric heater (10) and the second electric heater (20) accordingly.

Description

A POWER CONTROL METHOD FOR ELECTRIC HOB
TECHNICAL FIELD
The present invention relates to hobs with multiple heater whose power consumption is adjusted by an electronic control unit.
BACKGROUND ART
New generation kitchen designs require the collective use of a built-in hob, oven and hood. Built-in electric hobs are generally designed as 30cm, 60cm, 80cm and 90cm. In particular, electric hobs designed as 60cm, 80cm and 90cm need at least two-phase electricity network. However, this creates a problem in environments where the electricity network is generally limited to single-phase maximum.
On the other hand, the fact that both single-phase and multi-phase products are produced separately creates a great problem in terms of both time, cost and resources. For this reason, the most practical and cost-effective solution is to design products that can work with both single-phase and multi-phase. The maximum output power can be adjusted in accordance with the limits by choosing whether the product is single or multi-phase from the user interface unit. However, the main problem is the potential loss of performance when a product designed to operate in multi-phase is operated single-phase.
KR20160095784 discloses an algorithm in which other heaters are forced to consume low power in order to maintain the power level of a preferred high priority heater selected according to a priority information among heaters if the power consumption exceeds an allowable value in hobs with a large number of heaters.
BRIEF DESCRIPTION OF THE INVENTION
The object of the invention is to provide a simple power control algorithm that enables to limit the maximum power consumption by keeping performance loss at minimum in electric hobs.
To achieve the aforementioned objectives, invention relates a power control method for an electric hob comprising a first electric heater and at least one second electric heater provided on a panel and having a predetermined power level value for each presetting; an electronic control unit is driving periodically the first electric heater and/or the second electric heater such that activating at a predetermined normal switching period by directing mains current supplied from an electrical connection; a processor on the electronic control unit and an input unit provided for setting the input of preferred level setting of the first electric heater or the second electric heater, and a memory unit is storing the normal switching period data corresponding to each level setting on the electronic control unit with the processor connected to each other in signal transmitting manner. The power control method further comprising the operation steps of reading the activation signal by the processor of the first electric heater and the second electric heater from the input unit; driving the first electric heater and the second electric heater by processor such that when the sum of the instantaneous power value of the first electric heater and the second electric heater for the selected level is greater than a predetermined safe threshold power value enabling a safety mode to change normal switching period to reduced switching period stored in the memory unit so as to keep the total instantaneous power consumption value of the first electric heater and the second electric heater smaller or equal to the threshold power value. In this case, for example, in a hob with a single-phase electrical connection, the maximum instantaneous power value determined by the standards is stored in the memory unit as the threshold power value and the total instantaneous power consumption demand according to the number and step of the heater operated by the user is in the configuration to exceed the threshold power value, the process switches to safety mode and allows the average power value to be obtained, which is requested by keeping all the heaters on with the algorithm it operates here. Moreover, in this case, even if the threshold power value is exceeded, the desired day value in many different configurations can be fully achieved and the power losses limited to the maximum uses are minimized.
In a preferred embodiment of the invention, the reduced switching period in the memory unit by the processor is set as half of the normal switching period for each level setting of the input unit without changing its on time. In this case, the processor simply switches the corresponding heater on the basis of half of the normal switching period information contained in the memory, i.e. turns it on and off. The turn on time does not change, but its frequency increases. In this case, both the total desired power average is provided and the instantaneous power consumption value can be limited.
In a preferred embodiment of the invention, a third electric heater and/or a fourth electric heater is provided on the panel, and the electronic control unit is configured to switch on up to two heaters sequentially at the same time in reduced switching period in safety mode. The limitation of having two heaters on at the same time reduces complexity and allows the processor to manage power with less computation.
In a preferred embodiment of the invention, the total threshold power value stored in the memory unit is determined between 3000 W and 3800 W; when the highest level setting is made from the input unit, each of the electric heaters is essentially set to 900 W with the help of the processor, and the processor reduces the normal switching period selected between 38- 52 seconds to half such that only two electric heaters are activated at the same time. In this way, even in a scenario where the maximum power consumption, that is, all four heaters are switched on at the highest grade, the maximum daily consumption value determined by the standards in single-phase use is not exceeded.
In a preferred embodiment of the invention, it includes the operation steps of: when the lowest level setting is made from the input unit, each of the electric heaters is adjusted to 54 W power with the help of the processor; the processor reduces the normal switching period from 47 seconds to 23.5 seconds without changing the 1 .4 second on time such that only two electric heaters are on at the same time. In this way, with an heater switched on with single-phase use in accordance with the standards, it is possible to operate without loss of power or to be at the minimum in case of setting the other heaters to the higher grade.
In a preferred embodiment of the invention, the processor reads the activation of the first electric heater and the second electric heater from the input unit; it determines the first electric heater and the second electric heater grade value and compares it with the threshold power value by calculating the corresponding total instantaneous power consumption value from the memory unit according to the grade value.
In a preferred embodiment of the invention, the first electric heater and the second electric heater comprise electrical resistance. Although there are multiple heaters in hobs with electrical resistance and e.g. vitro-ceramic panels, single-phase use becomes possible.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic top view of a four-heater hob which performs the inventive control method. DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, the inventive development has been described without any limitation and only with references to the examples for a better disclosure of the subject.
In Figure 1 , a hob with an electric four-heater vitro-ceramic panel (1) is shown schematically from the top. At the bottom of the panel (1 ), a first electric heater (10), a second electric heater (20), a third electric heater (30) and a fourth electric heater (40) are mounted spaced each other, respectively. Each electric heater (10, 20, 30, 40) has a spiral resistance and the mains current supplied from an electrical network is transferred to the heaters (10, 20, 30, 40) in a controlled and selective manner by an electrical connection (60). Electrical connection (60) provides a single-phase input. In the exemplary embodiment, the electrical connection (60) is connected to a mains input limited to 15 A.
In a scenario where all heaters (10, 20, 30, 40) are switched on at the highest grade, the instantaneous total expected power value based on the operating command of the first electric heater (10) and the second electric heater (20) at maximum power coming from the input unit (54), reaches a power value of 1800 W value which is the threshold power value. After that, at the instant when the third electric heater (30) or the fourth electric heater (40) is switched on, the processor switches to safety mode and allows the power control algorithm to reduce all switching periods by half. In this case, the processor (52) will first switch on the first electric heater (10) and the second electric heater (20) at 23.5 seconds as the reduced switching period, and then it switches on the third electric heater (30) and the fourth electric heater (40) again for 23.5 seconds such that it provides 900W instant power consumption for each.
REFERENCE NUMBERS
1 Panel
10 First electric heater 20 Second electric heater 30 Third electric heater 40 Fourth electric heater 50 electronic control unit 52 Processor 54 Input unit 56 Memory unit 60 Electrical connection

Claims

1. Power control method for an electric hob comprising a first electric heater (10) and at least one second electric heater (20) provided on a panel (1) and having a predetermined power level value for each presetting; an electronic control unit (50) driving periodically the first electric heater (10) and/or the second electric heater (20) such that activating at a predetermined normal switching period by directing mains current supplied from an electrical connection (60); a processor (52) on the electronic control unit (50) and an input unit (52) provided for setting the input of preferred level setting of the first electric heater (10) or the second electric heater (20), and a memory unit (56) storing the normal switching period data corresponding to each level setting on the electronic control unit (50) with the processor (52) connected to each other in signal transmitting manner comprising the steps of the operation steps of reading the activation signal by the processor (52) of the first electric heater (10) and the second electric heater (20) from the input unit (54); driving the first electric heater (10) and the second electric heater (20) by processor (52) such that when the sum of the instantaneous power value of the first electric heater (10) and the second electric heater (20) for the selected level is greater than a predetermined safe threshold power value enabling a safety mode to change normal switching period to reduced switching period stored in the memory unit (56) so as to keep the total instantaneous power consumption value of the first electric heater (10) and the second electric heater (20) smaller or equal to the threshold power value.
2. A power control method according to claim 1 , comprising the step of setting the reduced switching period in the memory unit (56) as half of the normal switching period for each level setting of the input unit (54) without changing the on time by the processor (52).
3. A power control method according to any of the preceding claims, wherein a third electric heater (30) and/or a fourth electric heater (40) is provided on the panel (1) and the electronic control unit (50) is configured to switch on up to two heaters (10, 20, 30, 40) sequentially at the same time in reduced switching period in safety mode.
4. A power control method according to claim 3, wherein the total threshold power value stored in the memory unit (56) is determined between 3000 W and 3800 W; each of the electric heaters (10, 20, 30, 40) is adjusted to essentially 900 W power by means of the processor (52) when the highest level setting is made from the input unit (54); the processor (52) includes the steps of reducing the normal switching period selected between 38-52 seconds to half such that only two electric heaters (10, 20, 30, 40) are activated at the same time.
5. A power control method according to claim 4, comprising the operation steps of adjusting the power of each of the electric heaters (10, 20, 30, 40) to 54 W by means of the processor (52) when the lowest power level is selected from the input unit (54); reducing the normal switching period to half from the selected value between 38-52 seconds by the processor (52) without changing the 1 .4 second on time value such that only two electric heaters (10, 20, 30, 40) are switched on at the same time.
6. A power control method according to any of the preceding claims, comprising the operation steps of reading the activation signal of the first electric heater (10) and the second electric heater (20) from the input unit (54) with the processor (52); determining the level setting of the first electric heater (10) and the second electric heater (20) and calculating the corresponding total instantaneous power consumption value from the memory unit (54) according to the level setting and comparing with the threshold power value.
7. A power control method according to any of the preceding claims, wherein the first electric heater (10) and the second electric heater (20) comprises electric resistance.
PCT/TR2019/050917 2019-11-02 2019-11-02 A power control method for electric hob WO2021086279A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/TR2019/050917 WO2021086279A1 (en) 2019-11-02 2019-11-02 A power control method for electric hob
EP19951125.4A EP4035502A4 (en) 2019-11-02 2019-11-02 A power control method for electric hob

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2019/050917 WO2021086279A1 (en) 2019-11-02 2019-11-02 A power control method for electric hob

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WO2021086279A1 true WO2021086279A1 (en) 2021-05-06

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293028A (en) * 1987-01-05 1994-03-08 General Electric Company Cooktop appliance with improved power control
JPH06275374A (en) * 1993-03-22 1994-09-30 Matsushita Electric Ind Co Ltd Multi-opening induction heating cooking device
US20110253703A1 (en) * 2010-04-16 2011-10-20 Michael Andrew Theodos Control system and method for high density universal holding cabinet
JP2016139558A (en) * 2015-01-28 2016-08-04 三菱電機株式会社 Heater controller and heater control method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL109402A0 (en) * 1994-04-22 1994-07-31 Yahav Shimon Electrical cooking apparatus
ITMI20011253A1 (en) * 2001-06-14 2002-12-14 Whirlpool Co POWER MANAGEMENT SYSTEM IN ELECTRIC COOKING APPLIANCES

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5293028A (en) * 1987-01-05 1994-03-08 General Electric Company Cooktop appliance with improved power control
JPH06275374A (en) * 1993-03-22 1994-09-30 Matsushita Electric Ind Co Ltd Multi-opening induction heating cooking device
US20110253703A1 (en) * 2010-04-16 2011-10-20 Michael Andrew Theodos Control system and method for high density universal holding cabinet
JP2016139558A (en) * 2015-01-28 2016-08-04 三菱電機株式会社 Heater controller and heater control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4035502A4 *

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Publication number Publication date
EP4035502A1 (en) 2022-08-03
EP4035502A4 (en) 2023-06-14

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