EP0271419B1 - Verfahren und Vorrichtung zum Steuern der Leistungsschaltungen eines kombinierten Kochgerätes - Google Patents

Verfahren und Vorrichtung zum Steuern der Leistungsschaltungen eines kombinierten Kochgerätes Download PDF

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Publication number
EP0271419B1
EP0271419B1 EP19870440073 EP87440073A EP0271419B1 EP 0271419 B1 EP0271419 B1 EP 0271419B1 EP 19870440073 EP19870440073 EP 19870440073 EP 87440073 A EP87440073 A EP 87440073A EP 0271419 B1 EP0271419 B1 EP 0271419B1
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EP
European Patent Office
Prior art keywords
heating
temperature
resistors
application
power
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.)
Expired - Lifetime
Application number
EP19870440073
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English (en)
French (fr)
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EP0271419A2 (de
EP0271419A3 (en
Inventor
Bernard Logel
Jean Charles Reymann
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.)
DE DIETRICH EQUIPEMENT MENAGER, SOCIETE ANONYME
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DE DIETRICH EQUIPEMENT MENAGER
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Publication of EP0271419A3 publication Critical patent/EP0271419A3/fr
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    • 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

Definitions

  • the present invention relates to a method and a device for controlling the power circuits of a cooking enclosure combining cooking by microwave and cooking by electrical resistances.
  • Document FR 2 427 554 relates to an oven comprising an inverter for alternately supplying a magnetron and a heating element with electrical resistances.
  • This inverter is controlled by an electronic thyristor device which determines the application times of the two energies without taking account of the temperature regulation phases. This device is therefore complex and expensive.
  • microwave energy is not determined exclusively by the periods of the oven temperature control phase.
  • Document DE 3,204,942 relates to an oven comprising an inverter (360) for alternately supplying the heating means (10) and (12). But this inverter is controlled by a mechanical timer (16) which determines the durations of application of each of the energies. By adjusting the application times, a regulation temperature results. The regulating means (20) does not provide both temperature regulation and switching of the energies.
  • Microwave energy is not applied exclusively during the temperature regulation phase, and more particularly during the periods of this regulation phase when the resistors are cut.
  • Document FR 2 427 553 relates to an oven comprising a switching means for alternately supplying a magnetron and a gilding element with electrical resistance.
  • the cooking procedure used comprises a phase of application of the microwave energy, with a browning element off, to carry out the cooking of the food, and a phase of alternative application of the radiation of the browning element and microwave energy to brown the food at its optimal browning temperature.
  • the durations and / or the respective powers of application of the two types of energy are determined by the user by means of the power distribution (32) and / or duration distribution (36) controls. .
  • This cooking procedure therefore does not firstly include a temperature rise phase of the enclosure up to the thermostat cut-off temperature, exclusively due to the operation of the electrical resistors, then an application of microwave energy exclusively during the short time intervals between switching off the thermostat and resetting it.
  • the present invention aims to solve the drawbacks of the prior art and in particular to simplify the commands, to use a minimum of components, and to ensure the security of the non-cumulation of the two types of energy.
  • the thermostat for regulating the temperature inside the enclosure is used as the tilting means.
  • This regulation thermostat then performs two functions; temperature regulation and switching of heating energies.
  • Figure 1 is an overall diagram of the control device according to the invention.
  • Figures 2, 2a, 2b, 2c are graphs showing by way of example, sequences of application of the two types of energy.
  • Figures 3a and 3b are graphs showing, by way of example, different modes of application of microwave energy.
  • a cooking enclosure (1) comprises a power circuit for electric heating by resistances controlled by a switch (2), and a power circuit for heating by microwaves powered by a device ( 3).
  • the power circuit for electric heating has one or more heating resistors (2a, 2b, 2c).
  • the switch (2) has a plurality of positions for selecting individually or in combination each of the heating resistors.
  • the switch (2) can have the position called "combined position" described in patent application No. 82 00 089 filed in France in the name of the applicant.
  • the power circuit for microwave heating comprises an electromagnetic wave emitter: the magnetron (4), a waveguide (6) and a conventional supply device (3) comprising at least components of the type transformer, rectifier capacitors.
  • the control device also comprises a tilting means.
  • This tilting means can be an energy metering device, or a bimetallic strip, or preferably and as in FIG. 1, a regulating thermostat (5) of the cooking enclosure.
  • the regulation thermostat consists of a bulb (5a) for detecting the temperature in the enclosure, and two output terminals (5b and 5c) connected respectively to the device. power supply (3) and switch (2).
  • FIG. 2 represents the temperature curve inside the cooking chamber as a function of the heating time.
  • This curve has two parts, a part (P) corresponding to the temperature rise inside the enclosure under the effect of the heating resistors, a part (R) corresponding to the regulation of the cooking temperature by the thermostat. of regulation.
  • Points C indicate the times when the thermostat switches off the heating elements
  • points E indicate the moments when the thermostat switches on the electrical resistances. These different points C and E correspond respectively to a sewing temperature ( ⁇ C) and an engagement temperature ( ⁇ E).
  • FIGS. 2a, 2b and 2c there is shown in dotted lines the operating sequences of the electric heating and in solid lines the operating sequences of the microwave heating.
  • the duration of the operation of the microwave heating can be either equal to or less than the duration of the stopping of the heating by electrical resistances.
  • This duration of operation of the microwave heating can be fixed or adjustable by suitable means for controlling the magnetron (3) (see FIGS. 2a, 2b, 2c).
  • the new associated cooking ovens, traditional plus microwaves came to an installed power of 3.5 to 4.7 KW that is to say a power much higher than the admitted power of 3520 W (corresponding in France to the 16 Amp socket) and 2200 W (corresponding in France to the 10 Amp socket).
  • the electrical circuit shown in Figure 1 has the advantage of being very simple, to use a minimum number of components, to remove a control button, to decrease the cost price of the device, to present a great safety and to adapt to the standards of electrical installation of a country given.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Claims (10)

  1. Verfahren zur Steuerung der Leistungskreise eines Kochgerätes (1), das zwei elektrische Arten der Heizung kombiniert, das Heizen durch elektrische Widerstände und das Heizen durch Mikrowellen, derart, daß alternativ eine der beiden Heizarten angewandt wird und bei der die Phase der Heizung durch elektrische Widerstände eine Periode (P) des Temperaturanstiegs umfaßt, auf die eine Periode der Regulierung (R) der Temperatur zwischen einer ersten oberen Abschalt-Grenztemperatur (OC) und einer zweiten unteren Einschalt-Grenztemperatur (OE) folgt, wobei während der Periode (R) die Gesamtheit der Widerstände abwechselnd unter Spannung oder spannungslos ist, dadurch gekennzeichnet, daß die Heizung durch Mikrowellen ausschließlich während der Perioden erfolgt, in denen die Heizwiderstände spannungslos sind, und daß die Heizung durch Mikrowellen nach Ende der Periode (P) des Temperaturanstiegs beginnt, wenn diese erstmals die Abschalt-Grenztemperatur (OC) erreicht.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Heizung durch Mikrowellen während der Ausschalt-Perioden der Widerstände (C-E) anhaltend erfolgt.
  3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Heizung durch Mikrowellen während der Ausschalt-Perioden der Widerstände (C-E) sequentiell erfolgt.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Heizung durch Mikrowellen mit konstanter Leistung erfolgt.
  5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Heizung durch Mikrowellen mit einstellbarer Leistung erfolgt.
  6. Vorrichtung zur Steuerung eines Kochgerätes unter Anwendung des Verfahrens nach den Ansprüchen 1 bis 5, bestehend aus zumindest:
    - einem mit einem Schalter (2) steuerbaren Leistungskreis für die Heizung durch elektrische Widerstände,
    - einem von einer Versorgungseinrichtung (3) gespeisten Leistungskreis für die Heizung durch Mikrowellen,
    - einer Umschalteinrichtung für die Stromzufuhr zur alternativen Versorgung der beiden Leistungskreise,
    - einer Regulierungseinrichtung (5) für die Temperatur des Kochgerätes (1) mit zwei Ausgangsanschlüssen (5b, 5c),
    dadurch gekennzeichnet, daß zur Steuerung der Umschalteinrichtung für die Heizungsart einer der Ausgangsanschlüsse (5b) der Regulierungseinrichtung an die Versorgungseinrichtung (3) des Leistungskreises für die Heizung durch Mikrowellen angeschlossen ist und daß der andere Ausgangsanschluß (5c) an den Leistungskreis für die Heizung durch elektrische Widerstände angeschlossen ist.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Regulierungseinrichtung (5) ein Thermostat ist.
  8. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Regulierungseinrichtung (5) ein Energiedosierer ist.
  9. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Regulierungseinrichtung (5) ein Bimetall ist.
  10. Vorrichtung nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß der andere Ausgangsanschluß (5c) an den Schalter (2) angeschlossen ist.
EP19870440073 1986-11-07 1987-11-02 Verfahren und Vorrichtung zum Steuern der Leistungsschaltungen eines kombinierten Kochgerätes Expired - Lifetime EP0271419B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8615797A FR2606578B1 (fr) 1986-11-07 1986-11-07 Procede et dispositif pour la commande des circuits de puissance d'une enceinte de cuisson mixte
FR8615797 1986-11-07

Publications (3)

Publication Number Publication Date
EP0271419A2 EP0271419A2 (de) 1988-06-15
EP0271419A3 EP0271419A3 (en) 1988-07-20
EP0271419B1 true EP0271419B1 (de) 1992-04-22

Family

ID=9340778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870440073 Expired - Lifetime EP0271419B1 (de) 1986-11-07 1987-11-02 Verfahren und Vorrichtung zum Steuern der Leistungsschaltungen eines kombinierten Kochgerätes

Country Status (3)

Country Link
EP (1) EP0271419B1 (de)
DE (1) DE3778509D1 (de)
FR (1) FR2606578B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660053B1 (fr) * 1990-03-22 1993-04-23 Moulinex Sa Procede de cuisson pour un four a chauffage combine par convection, gril et micro-ondes.
DE4305211C2 (de) * 1993-02-19 2001-10-18 Bsh Bosch Siemens Hausgeraete Verschließbares Heizgerät mit einem Behandlungsraum mit Temperaturregelung
SE502882C2 (sv) * 1994-06-13 1996-02-12 Whirlpool Europ Mikrovågsugn med undervärme
KR0168177B1 (ko) * 1995-02-28 1999-01-15 김광호 복합전자렌지의 온도제어장치 및 그 방법
CN105682260B (zh) * 2016-01-06 2018-12-18 浙江大学 一种分阶段加热控制及报警指示电路

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54102639A (en) * 1978-01-30 1979-08-13 Matsushita Electric Ind Co Ltd High frequency heating device
JPS5922133B2 (ja) * 1978-05-10 1984-05-24 株式会社東芝 蒸気発生器付高周波加熱装置
US4227062A (en) * 1978-05-31 1980-10-07 General Electric Company Optimum time ratio control system for microwave oven including food surface browning capability
US4188520A (en) * 1978-05-31 1980-02-12 General Electric Company Effective concurrent microwave heating and electrical resistance heating in a countertop microwave oven
US4198553A (en) * 1978-06-01 1980-04-15 General Electric Company Combination oven fully utilizing the capability of a limited power source
GB2033108B (en) * 1978-09-26 1983-01-06 Matsushita Electric Ind Co Ltd Controlling heating apparatus
JPS6340721Y2 (de) * 1981-02-16 1988-10-25
US4582971A (en) * 1984-02-07 1986-04-15 Matshushita Electric Industrial Co., Ltd. Automatic high-frequency heating apparatus

Also Published As

Publication number Publication date
EP0271419A2 (de) 1988-06-15
FR2606578A1 (fr) 1988-05-13
EP0271419A3 (en) 1988-07-20
FR2606578B1 (fr) 1995-03-31
DE3778509D1 (de) 1992-05-27

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