DE3146638A1 - Boiling point control device for cooking stoves to save energy - Google Patents

Boiling point control device for cooking stoves to save energy

Info

Publication number
DE3146638A1
DE3146638A1 DE19813146638 DE3146638A DE3146638A1 DE 3146638 A1 DE3146638 A1 DE 3146638A1 DE 19813146638 DE19813146638 DE 19813146638 DE 3146638 A DE3146638 A DE 3146638A DE 3146638 A1 DE3146638 A1 DE 3146638A1
Authority
DE
Germany
Prior art keywords
borne sound
boiling
sound sensor
borne
arrangement according
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Withdrawn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
DE19813146638
Other languages
German (de)
Inventor
Gerhard 7000 Stuttgart Brüggen
Dieter 7250 Leonberg Karr
Josef 7016 Gerlingen Winkler
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.)
Karr Dieter Dipl-Phys 1000 Berlin De Bruegge
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19813146638 priority Critical patent/DE3146638A1/en
Publication of DE3146638A1 publication Critical patent/DE3146638A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/56—Preventing boiling over, e.g. of milk
    • A47J27/62—Preventing boiling over, e.g. of milk by devices for automatically controlling the heat supply by switching off heaters or for automatically lifting the cooking-vessels
    • 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
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • 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
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/105—Constructive details concerning the regulation of the temperature
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
    • G05D23/27535—Details of the sensing element
    • G05D23/27543—Details of the sensing element using the controlled element as sensing element
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Cookers (AREA)

Abstract

Today's cooking stoves have temperature-controlled hotplates. However, since the boiling process is a phase transition which depends on external parameters, such as air pressure or salt content of the product, the control of the simmering process is difficult. A method has been developed which registers the phase transition itself. During boiling, bubbles of steam are formed which cause the liquid, saucepan and hotplate to vibrate. The size of the vibration amplitudes is measured and the signal is used to control the heat supply. The method avoids both boiling over and initiation of the boiling process.

Description

Beschreibungdescription

Stand der Technik: Moderne Küchenherde besitzen temperaturgeregelte Kochplatten. Der Temperatursensor ist in der Kochplatte integriert, er mißt die Temperatur an der Topfunterseite. Weil bereits geringe Schwankungen des atmosphärischen Luftdruckes oder Zugaben von Kochsalz den Siedepunkt der Flüssigkeit verschieben, ist die Temperatur als Regelgröße für den Kochvorgang ungeeignet. Außerdem ist die erforderliche Wärmezufuhr von der Größe des Topfes und von der Flüssigkeitsmenge abhängig. Die Hausfrau ist gezwungen, die Heizleistung individuell einzustellen, weil die Temperaturvorwahl zur Einhaltung des Kochzustandes zu ungenau ist.State of the art: Modern kitchen stoves have temperature-controlled Hotplates. The temperature sensor is integrated in the hotplate, it measures the Temperature on the bottom of the pot. Because already small fluctuations in the atmospheric Air pressure or the addition of table salt shift the boiling point of the liquid, the temperature is unsuitable as a control variable for the cooking process. Besides, the required heat input depending on the size of the pot and the amount of liquid addicted. The housewife is forced to adjust the heating power individually, because the temperature preselection is too imprecise to maintain the cooking status.

Dies erfordert ein mehrmaliges Nachregeln der Heizstufe bis die ideale Kochstufe gefunden ist. Bei zu großer Wärmezufuhr wird ein Teil der Flüssigkeit verdampft, ohne Nutzen für den Kochvorgang. Bei zu geringer Wärmezufuhr verlängert sich der Kochprozeß.This requires the heating level to be readjusted several times until the ideal one Heat setting is found. If the heat supply is too great, part of the liquid will be lost evaporates, of no use to the cooking process. Extended if the heat supply is too low the cooking process.

Erfindung: Die der Erfindung zugrunde liegende Idee sieht als Regelgröße für den Kochvorgang den beim Sieden erzeugten Körperschall vor. Gemessen wird das Körperschallsignal auf der Unterseite des Topfes durch einen Körperschallsensor.Invention: The idea on which the invention is based sees as a controlled variable the structure-borne noise generated during boiling for the cooking process. That is measured Structure-borne sound signal on the underside of the pot by a structure-borne sound sensor.

Beim Erwärmen einer Flüssigkeit entstehen Dampfblasen in der Flüssigkeit, wenn der Siedepunkt erreicht wird; der Partialdruck der Flüssigkeit ist dann gLeich dem atmosphärischen Druck. Die Dampfblasen regen die Flüssigkeit und den Kochtopf zu Schwingungen an, die mit einem Körperschallsensor detektiert werden können. Diese Meßmethode ist unabhängig von der Siedetemperatur der Flüssig keit, da der Siedevorgang selbst erfaßt wird. Damit ist für den Kochvorgang eine ideale Regelgröße gegeben.When a liquid is heated, vapor bubbles form in the liquid, when the boiling point is reached; the partial pressure of the liquid is then the same the atmospheric pressure. The steam bubbles stimulate the liquid and the saucepan to vibrations that can be detected with a structure-borne sound sensor. These The measuring method is independent of the boiling point of the liquid, since the boiling process is detected itself. This provides an ideal control variable for the cooking process.

Durchführung: Das Körperschallsignal des Siedevorganges kann direkt mit Hilfe eines Stiftes auf der Unterseite des Topfbodens erfaßt werden. Der Stift ragt durch eine Bohrung in der Mitte der Kodplatte, am Ende des Stiftes befindet sich der Wandlerteil des Sensors. Die beim Kochvorgang freiwerdende Schwingungsenergie erlaubt auch eine indirekte Erfassung des Körperschallsignals durch Detektion der Schwingungen, die vom Topf auf die elektrische Heizplatte oder die Stützfüße an einem Gasherd übertragen werden.Implementation: The structure-borne sound signal of the boiling process can be carried out directly can be detected with the help of a pen on the underside of the bottom of the pot. The pencil protrudes through a hole in the middle of the code plate, located at the end of the pin the converter part of the sensor. The one released during the cooking process Vibration energy also allows the structure-borne noise signal to be recorded indirectly by detecting the vibrations from the pot to the electric heating plate or the support feet can be transferred to a gas stove.

Das so erhaltene elektrische Signal wird in einer elektronischen Einheit verstärkt, frequenz filtert und von Störsignalen befreit. Eine Triggerstufe tastet das Signal ab und gibt über ein Relais das Kommando zum Heizen oder Abschalten. Die Regelung der Heizung kann sowohl digital als auch analog erfolgen. Mit Hilfe eines Stellventils kann diese Regeleinrichtung auch bei Gasherden eingesetzt werden. Der Körperschallsensor ist dann in einem der Stützfüßen integriert.The electrical signal thus obtained is stored in an electronic unit amplified, frequency filters and freed from interfering signals. A trigger level is probing emits the signal and gives the command for heating or switching off via a relay. The heating can be controlled digitally as well as analog. With help a control valve, this control device can also be used for gas stoves. The structure-borne sound sensor is then integrated in one of the support feet.

Anhand eines Pegelstellers kann die Hausfrau die gewünschte Siedestufe "schwach", "mittel", "stark" vorwählen, das entspricht einer halbautomatischen Betriebsart. Wird der Pegelsteller in einer Zusatzelektronik integriert, so können Kochprofile durebfahren werden dies entspricht der automatischen Betriebsart. Je nach Anwendungsfall ist auch eine Kombination der Körperschallregelung mit der Temperaturregelung denkbar.The housewife can set the desired boiling point using a level regulator Preselect "weak", "medium", "strong", this corresponds to a semi-automatic operating mode. If the level control is integrated in additional electronics, cooking profiles This corresponds to the automatic operating mode. Depending on the application A combination of structure-borne noise control with temperature control is also conceivable.

Mit dem Eirsatz der Erfindung sehen wir folgende Vorteile: - Energieeinsparung: weil die minimale Energiemenge eingesetzt wird - Zeiteinsparung: durch exakte Siedepunkteinstellung - Bedienungskomfort: das lästige Nachregeln unterbleibt L e e r 8 ei t eWith the implementation of the invention we see the following advantages: - Energy saving: because the minimum amount of energy is used - time saving: due to the exact boiling point setting - Ease of use: there is no annoying readjustment L e r 8 ei t e

Claims (6)

Siedepunktsregelung für Küchenherde zur Energieeinsparung Patentansprüche U Eine Einrichtung zur Regelung des Kochvorganges von Flüssigkeiten durch Erfassung der Körperschallanregung der Siedeblasen d a d u r c h g e k e n n z e i c h n e t , daß die Schwingungen des Flüssigkeitsbehälters von einem Körperschallsensor detektiert und das erhaltene Signal zur Regelung der Wärmezufuhr verwandt wird. Boiling point control for kitchen stoves to save energy patent claims U A device for regulating the boiling process of liquids through detection the structure-borne noise excitation of the boiling bubbles t that the vibrations of the liquid container from a structure-borne sound sensor is detected and the signal received is used to regulate the heat supply. 2. Anordnung nach Anspruch 1 d a d u r c h g e k e n n z e i c h n e t daß der Körperschallsensor fest mit dem Flüssigkeitsbehälter verbunden ist. 2. Arrangement according to claim 1 d a d u r c h g e k e n n z e i c h n e t that the structure-borne sound sensor is firmly connected to the liquid container. 3. Anordnung nach Anspruch 1 d a d u r c h g e k e n n z e i c h n e t daß der Körperschallsensor (1) am Heizelement positioniert ist und beim AiItellen eines Topfes (2) der Sensor Körperschallkontakt zum Topf erhält (Fig. 1). 3. Arrangement according to claim 1 d a d u r c h g e k e n n z e i c h n e t that the structure-borne sound sensor (1) is positioned on the heating element and when it is positioned of a pot (2) the sensor receives structure-borne sound contact with the pot (Fig. 1). h. Anordnung nach Anspruch 1 d a d u r c h g e k e n n z e i c h n e t daß der Körperschallsensor (1) auf der Unterseite der Heizeinrichtung (3) oder integriert im Heizelement angebracht ist und den Körperschall der Heizeinrichtung erfaßt, der durch den Topf eingeleitet wird (Fig. 2). H. Arrangement according to claim 1 d a d u r c h g e k e n n n z e i c h n e t that the structure-borne sound sensor (1) on the underside of the heating device (3) or is integrated in the heating element and the structure-borne noise of the heating device detected, which is initiated by the pot (Fig. 2). 5. Anordnung nach Anspruch 1 d a d u r c h g e k e n n z e i c h n e t daß der Körperschallsensor (1) in einem der Stützfüße (3) (z.B. Gasherd) integriert ist und den Körperschall des Kochtopfes (2) erfaßt (Fig. 3). 5. Arrangement according to claim 1 d a d u r c h g e k e n n z e i c h n e t that the structure-borne sound sensor (1) is integrated in one of the support feet (3) (e.g. gas stove) and the structure-borne noise of the saucepan (2) is detected (Fig. 3). 6. Anordnung nach Anspruch 1 - 5 d a d u r c h g e k e n n z e i c h n e t, daß der Körperschallsensor mit einem Temperatursensor kombiniert ist. 6. Arrangement according to claim 1-5 d a d u r c h g e k e n n z e i c h n e t that the structure-borne sound sensor is combined with a temperature sensor.
DE19813146638 1981-11-25 1981-11-25 Boiling point control device for cooking stoves to save energy Withdrawn DE3146638A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
DE19813146638 DE3146638A1 (en) 1981-11-25 1981-11-25 Boiling point control device for cooking stoves to save energy

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410465A1 (en) * 1984-03-22 1985-10-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Method and device for determining the boiling of liquids and/or foods
EP0390877A1 (en) * 1987-11-30 1990-10-10 Gas Res Inst Boiling condition detector.
EP0479091A2 (en) * 1990-09-28 1992-04-08 Chen, George Boiling detecting devices for a stove
DE19638355A1 (en) * 1996-09-19 1998-04-02 Gaggenau Werke Cooking sensing method for hotplate
WO2006070334A1 (en) * 2004-12-28 2006-07-06 Arcelik Anonim Sirketi A cooking device
EP2227722A1 (en) * 2007-11-07 2010-09-15 Otter Controls Limited Liquid heating vessel and control
WO2011069695A1 (en) 2009-12-07 2011-06-16 Msx Technology Ag Method for controlling a cooking process
EP2590473A1 (en) * 2011-11-04 2013-05-08 BSH Bosch und Siemens Hausgeräte GmbH Cooking device
WO2013081558A1 (en) 2011-12-02 2013-06-06 Albin Smrke Control device for cooking with a steam sensor
DE102014114901A1 (en) * 2014-10-14 2016-04-14 Frima International Ag Cooking appliance and method for detecting a process parameter of a cooking process
WO2016087129A1 (en) * 2014-12-03 2016-06-09 Robert Bosch Gmbh Acoustic monitoring device for fuel quality
DE102015109053A1 (en) 2015-06-09 2016-12-15 Miele & Cie. Kg Cooking field device and method of operation
EP3767182A1 (en) * 2019-07-19 2021-01-20 LG Electronics Inc. Method and heating apparatus for estimating status of heated object

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410465A1 (en) * 1984-03-22 1985-10-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Method and device for determining the boiling of liquids and/or foods
EP0390877A1 (en) * 1987-11-30 1990-10-10 Gas Res Inst Boiling condition detector.
EP0390877A4 (en) * 1987-11-30 1991-10-09 Gas Research Institute Boiling condition detector
EP0479091A2 (en) * 1990-09-28 1992-04-08 Chen, George Boiling detecting devices for a stove
EP0479091A3 (en) * 1990-09-28 1992-10-14 Leong Chi Lei Boiling detecting devices for a stove
DE19638355A1 (en) * 1996-09-19 1998-04-02 Gaggenau Werke Cooking sensing method for hotplate
DE19638355C2 (en) * 1996-09-19 1998-08-20 Gaggenau Werke Method for determining the boiling point and boiling point of a food item in a cooking vessel
EP0944293A1 (en) * 1996-09-19 1999-09-22 Gaggenau Hausgeräte GmbH Method for determining the simmering and boiling points of a foodstuff in a cooking vessel
WO2006070334A1 (en) * 2004-12-28 2006-07-06 Arcelik Anonim Sirketi A cooking device
EP2227722A1 (en) * 2007-11-07 2010-09-15 Otter Controls Limited Liquid heating vessel and control
WO2011069695A1 (en) 2009-12-07 2011-06-16 Msx Technology Ag Method for controlling a cooking process
US9027469B2 (en) 2009-12-07 2015-05-12 Msx Technology Ag Method for controlling a cooking process
EP2590473A1 (en) * 2011-11-04 2013-05-08 BSH Bosch und Siemens Hausgeräte GmbH Cooking device
WO2013081558A1 (en) 2011-12-02 2013-06-06 Albin Smrke Control device for cooking with a steam sensor
DE102014114901A1 (en) * 2014-10-14 2016-04-14 Frima International Ag Cooking appliance and method for detecting a process parameter of a cooking process
WO2016087129A1 (en) * 2014-12-03 2016-06-09 Robert Bosch Gmbh Acoustic monitoring device for fuel quality
CN107002547A (en) * 2014-12-03 2017-08-01 罗伯特·博世有限公司 Acoustic monitoring device for fuel mass
US10466203B2 (en) 2014-12-03 2019-11-05 Robert Bosch Gmbh Acoustic monitoring device for fuel quality
CN107002547B (en) * 2014-12-03 2020-06-09 罗伯特·博世有限公司 Acoustic monitoring device for fuel quality
DE102015109053A1 (en) 2015-06-09 2016-12-15 Miele & Cie. Kg Cooking field device and method of operation
DE102015109053B4 (en) 2015-06-09 2018-04-05 Miele & Cie. Kg Cooking field device and method of operation
EP3767182A1 (en) * 2019-07-19 2021-01-20 LG Electronics Inc. Method and heating apparatus for estimating status of heated object
US11759043B2 (en) 2019-07-19 2023-09-19 Lg Electronics Inc. Method and heating apparatus for estimating status of heated object

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: KARR, DIETER, DIPL.-PHYS., 1000 BERLIN, DE BRUEGGE

8139 Disposal/non-payment of the annual fee