EP0818655B1 - Procédé et dispositif de commande de la grandeur de la flamme des appareils de cuison à gaz - Google Patents

Procédé et dispositif de commande de la grandeur de la flamme des appareils de cuison à gaz Download PDF

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Publication number
EP0818655B1
EP0818655B1 EP97110879A EP97110879A EP0818655B1 EP 0818655 B1 EP0818655 B1 EP 0818655B1 EP 97110879 A EP97110879 A EP 97110879A EP 97110879 A EP97110879 A EP 97110879A EP 0818655 B1 EP0818655 B1 EP 0818655B1
Authority
EP
European Patent Office
Prior art keywords
switching
gas
elements
settings
switching elements
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
EP97110879A
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German (de)
English (en)
Other versions
EP0818655A3 (fr
EP0818655A2 (fr
Inventor
Joachim Dr.-Ing. Damrath
Gerhard Dipl.-Ing. Rothenberger
Martin Dr.-Ing. Kornberger
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0818655A2 publication Critical patent/EP0818655A2/fr
Publication of EP0818655A3 publication Critical patent/EP0818655A3/fr
Application granted granted Critical
Publication of EP0818655B1 publication Critical patent/EP0818655B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/005—Regulating fuel supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/08—Microprocessor; Microcomputer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/02—Controlling two or more burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/08—Household apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87298—Having digital flow controller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87338—Flow passage with bypass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87539—Having guide or restrictor

Definitions

  • the invention relates to a device and a corresponding Method for controlled gradual reduction of a burner nozzle of a gas-operated cooking or baking device via a gas supply supplied gas stream Q.
  • Common cooking or baking devices for example gas stoves, Gas hobs, gas hobs or gas ovens, have one or more burners in which the gas is mixed with atmospheric oxygen and burned.
  • the gas supply to the burner is via a gas supply line from a gas pipeline network, a gas tank or a gas bottle is supplied with gas.
  • a gas pipeline network With a city gas pipeline network the feed pressure is approx. 8 mbar; he however, is subject to fluctuations and can reach 4 mbar decline.
  • the feed pressure is approx. 50 mbar.
  • the burners have a burner nozzle that is connected the burner to the gas supply line the relevant, the flow resistance limiting the outflowing gas flow forms and thus the maximum heating power of the Brenners determined.
  • the flow resistance in the gas supply line can usually be neglected become.
  • the maximum heating output of the burner must, however in practical use by the user at the moment required heating power can be reduced. The reducing the heating power must therefore be with the help of a suitable one Control anytime, easily and on a value as close as possible to the desired or required Heat output can be carried out.
  • From document DE 4225789 A1 is a measuring and testing device for the one-time setting and adjustment of a Gas heater known in the two in a row switched gas pressure regulator, a programmable logic controller Control with the necessary for the respective adjustment cases Working characteristics and four pressure gauges provided are.
  • This known device is technical very complex, so that they are in the context of production control to adjust an adjustable throttle or an adjustable gas device pressure regulator of a gas heater suitable, but not for permanent adjustment the heating capacity of a gas-powered cooking or Baking device by the user.
  • a gas regulator is known from document FR-911.892, which is a series of openings with different diameters has, of which at a desired heating level exactly one for the gas flow is opened.
  • the present invention takes this state into account the technology based the task, a device and a method for controlled reduction of a burner nozzle a gas-powered cooking or baking device to create a gas feed line Q, by means of which the gas flow through the user of the device adjustable in steps reproducible with high accuracy is.
  • the method and the device are technically inexpensive are feasible, easy to use and durable work reliably.
  • the invention is based on the consideration, a number provide throttle elements, by means of which a through the burner nozzle and the connection pressure given, maximum Gas flow can be reproduced in stages in a defined manner can be reduced.
  • the function of the respective throttle elements are switching elements to provide the gas flow through each Can turn throttle element on and off. Through the Combination of certain switching elements switched on and off can then achieve a defined reduction in the gas flow be performed or if all throttling elements are open, the maximum gas flow is achieved become.
  • the gas flow Q a Number n of control elements connected in series in the gas supply line passes through, each with a throttle element Throttling the gas stream flowing through it and a Throttle element switching element connected in parallel to Switching a bypass on and off to the throttle element have, and the switching elements optionally, depending on the desired heating output, can be switched on and off.
  • Mixed forms are also possible in which throttle elements connected in parallel as well as in series are.
  • the control bodies can in principle the function of Switching element and that of the throttle element in one Realize assembly, for example in the form of an electromagnetic actuated binary throttle valve, the has a closed and a throttle position.
  • the control members each comprise a switching element and a throttle element in the sense that they are these elements Realize in a single control at the same time.
  • the switching elements are individually by hand, using a respective control device or advantageously by means of a common control device on and off.
  • a common control device In the most general case there is a number n of control devices provide with which each switching element can be switched on and off individually.
  • it is particularly advantageous one for the switching elements of a burner nozzle provide common control device, each has different switching levels to which the by the combination of the switching elements corresponding gradations are assigned to the gas flow.
  • the control device for example the associated one Controller or by pressing the corresponding step key, a certain switching level is selected, and the Control unit combines the corresponding switching elements to generate the preselected one to be fed to the burner nozzle Gas stream.
  • the control device an integer number i discrete for the n switching elements Has switching positions, each one Combination of the open and closed positions of the n Switching elements is assigned.
  • the control device can for example a rotary or tap changer, a control panel with buttons assigned to the respective switching positions are, or preferably also a "touch control panel", a switch that can be operated by touch his.
  • the user does not have to look around the individual control of the individual switching elements to take care of, since the control device the selected switching stage automatically in the appropriate manner in the corresponding Combination of open and closed switching elements implements.
  • the number i of the switching positions the control device is smaller than the number the various realizable with the switching elements Gradations of the gas flow, for example, if not all levels for practical use are necessary. For example, it may be desirable be a fine gradation in the area of advanced cooking, in the other areas, however, a coarser gradation to provide the total number of adjustable levels in to keep practically reasonable limits.
  • the closest higher or lower heating level is set by increasing or decreasing the switch position, i.e. a monotonous adjustment option is achieved.
  • the number i of the switching positions of the control device is 2 n , the switching positions being assigned exactly one of the possible combinations of the open and closed positions of the n switching elements.
  • uniform gradations of the heating power are realized by means of the control device for successive switching positions, as known to the user of electronically controllable electric stoves and electric hobs.
  • the above-mentioned requirement with regard to a uniform gradation of the adjustable heating powers will, however, generally be difficult to meet with a series connection of throttle elements.
  • the switching elements can in principle in any way are operated, for example mechanically, pneumatically or hydraulic. According to a particularly preferred feature it is proposed that at least one switching element, preferably all switching elements can be actuated electrically.
  • the switching elements can be in an advantageous embodiment binary solenoid switching valves that are open and have a closed position.
  • Such solenoid valves are known and fulfill those to be placed on them safety requirements. With such solenoid switching valves it is, as is generally the case with electrical actuatable switching elements, for an additional Feature of advantage if that occurring during the switching process Clacking is prevented or dampened.
  • To this Purpose can open the electrical control signal and / or closing the switching element, at least in the area of the switching point, be edge-controlled, so that the switching process is not abrupt. advantageously, is therefore an electrical circuit for gradual Increase and / or decrease the electrical Control current provided.
  • the device Carry out switching elements only a few switching cycles, namely only if the setting of the gas flow Q is changed becomes. Therefore, if at all, they are only subject to a very long-term wear.
  • the flow resistance of the throttle elements in the factory or, if necessary be adjustable by the user Come for this for example adjustable throttle valves in question a calibration option for setting and adjusting of their choke resistance to a desired value. This can be beneficial if it is on the Achieving a high degree of accuracy of the gradations or of the set partial gas flows arrives, which then through exact setting and exact adjustment of the throttle elements is feasible. According to a preferred one, for the usual accuracy requirements to be set in practice sufficient feature is suggested that one, several or preferably all throttle elements one have predetermined flow resistance.
  • the Throttle elements can be used, for example, as capillaries, capillary tubes, Nozzle or pipe constriction can be realized. These embodiments are with satisfactory accuracy to implement inexpensively.
  • Fig. 1 shows one of a gas pipeline network, a gas tank or a gas bottle supplied gas supply line 1 for the supply of gas controlled according to the invention to a Burner nozzle 3, which is part of a burner 2, the e.g. built into a gas stove or gas oven can be.
  • Burner nozzle 3 which is part of a burner 2
  • Those for gas-powered are not shown
  • Cooking and baking devices usual security elements (Thermocouple and associated solenoid valve) that the When the flame goes out, interrupt the gas flow.
  • throttle elements 15, 25 and 35 there are three throttle elements 15, 25 and 35 connected in series in the gas supply line 1.
  • the throttle elements 15, 25 and 35 are capillaries, which have a fixed flow resistance exhibit.
  • the choke resistances of the individual choke elements are preferably different. For example, you can be dimensioned so that the burner nozzle 3 of the burner 2 supplied via the burner feed line 5 Gas flow by switching on one throttle element is reduced to 3/4 or 1/2 or 1/4. When switching the gas flow is from two or three throttle elements on one by the product of the above shares given part of the maximum gas flow reduced.
  • switching elements 14, 24 and 34 For switching the respective throttle elements on and off these are switching elements 14, 24 and 34 in parallel connected.
  • the switches When opening a switching element, the flows Gas flow unhindered by that acting as a bypass 16, 26, 36 Switching element, so that the associated throttle element does not reduce the gas flow.
  • the throttling the throttle element 25 out of function and the gas flow provided the throttle elements 14 and 34 are closed are throttled only by the throttle elements 15 and 35.
  • the switching elements 14, 24 and 34 are common Control device 4 controlled by means of which the desired Heating power is adjustable.
  • To switch off of the gas flow is an additional one, in the burner supply line 5 or preferably the gas supply line 1 used Switching valve, which is not shown, required. This can be done, for example, to monitor the Extinguishing the flame uses existing solenoid valve become.
  • all three switching elements electrically operable binary Solenoid switching valves that have an open and a closed position have a bypass either one or can be switched off. That independently of each other opening and closing of the solenoid switching valves is controlled by the control device 4.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)

Claims (14)

  1. Dispositif pour réduire de manière commandée et graduelle le flux de gaz Q amené par l'intermédiaire d'une conduite de gaz (1) à une buse de brûleur (3) d'un appareil de cuisson ou four fonctionnant au gaz,
    caractérisé en ce qu'il présente un nombre n d'organes de commande installés en série dans la conduite de gaz (1) et en ce que les organes de commande présentent chacun un élément d'étranglement (15, 25, 35) pour étrangler le flux de gaz les traversant et un élément de commutation (14, 24, 34) installé en parallèle à l'élément d'étranglement (15, 25, 35) pour la mise en service et hors service d'un bypass (16, 26, 36) par rapport à l'élément d'étranglement (15, 25, 35), et en ce que les éléments de commutation (14, 24, 34) peuvent être, au choix, mis en service et hors service en fonction de la puissance de chauffage sélectionnée.
  2. Dispositif selon la revendication 1, caractérisé en ce que les éléments de commutation (11, 21, 31, 41; 14, 24, 34) peuvent être mis en service et hors service au moyen d'un dispositif de commande (4) commun.
  3. Dispositif selon la revendication 2, caractérisé en ce que le dispositif de commande (4) présente un nombre entier i de positions de commande discrètes, dont respectivement une combinaison des positions ouvertes et fermées est attribuée aux n éléments de commutation (11, 21, 31, 41; 14, 24, 34).
  4. Dispositif selon la revendication 3, caractérisé en ce que le nombre i des positions de commutation des dispositifs de commande (4) est de 2n, exactement l'une des combinaisons possibles des positions ouvertes et fermées des n éléments de commutation (11, 21, 31, 41; 14, 24, 34) étant respectivement attribuée aux positions de commutation.
  5. Dispositif selon la revendication 4, caractérisé en ce que la combinaison des positions ouvertes et fermées des n éléments de commutation (11, 21, 31, 41; 14, 24, 34) est attribuée à une séquence de m = 1, 2, 3 ...., 2n de positions de commutation successives Sm du dispositif de commande (4), de telle sorte que les flux de gaz Qm amenés à la buse du brûleur (3) forment une séquence ascendante ou descendante qui prend essentiellement les valeurs Qm = Qmax · (m-1) / (2n-1).
  6. Dispositif selon la revendication 5, caractérisé en ce que la déviation maximale des flux de gaz Qm par rapport à la graduation exacte est inférieure à ± 20%, de préférence inférieure à ± 15%, de manière préférée inférieure à ± 10% et de manière particulièrement préférée inférieure à ± 5%.
  7. Dispositif selon la revendication 1, caractérisé en ce qu'au moins un élément de commutation (11, 21, 31, 41; 14, 24, 34) est formé comme électrovanne binaire.
  8. Dispositif selon la revendication 1, caractérisé en ce qu'il présente un circuit électrique pour l'augmentation et/ou la diminution progressive du courant de commande électrique de l'élément de commutation (11, 21, 31, 42; 14, 24, 34).
  9. Dispositif selon la revendication 1, caractérisé en ce qu'au moins l'un des éléments d'étranglement (12, 22, 32, 42; 15, 25, 35) présente une perte de charge fixe prédéfinie.
  10. Dispositif selon la revendication 9, caractérisé en ce que l'élément d'étranglement (12, 22, 32, 42; 15, 25, 35) est formé comme capillaire, comme tube capillaire, comme buse ou comme rétrécissement tubulaire.
  11. Appareil de cuisson ou four, notamment cuisinière à gaz, plaque de cuisson au gaz, table d'encastrement au gaz ou four au gaz, caractérisé en ce qu'il présente un dispositif selon l'une ou plusieurs des revendications 1 à 10.
  12. Procédé pour réduire de manière commandée et graduelle le flux de gaz Q amené par l'intermédiaire d'une conduite de gaz (1) à une buse de brûleur (3) d'un appareil de cuisson ou four fonctionnant au gaz, caractérisé en ce que le flux de gaz Q traverse un nombre n d'organes de commande installés en série dans la conduite de gaz (1), présentant chacun un élément d'étranglement (15, 25, 35) pour étrangler le flux de gaz les traversant et un élément de commutation (14, 24, 34) installé en parallèle à l'élément d'étranglement (15, 25, 35) pour la mise en service et hors service d'un bypass (16, 26, 36) par rapport à l'élément d'étranglement (15, 25, 35), et en ce que les éléments de commutation (14, 24, 34) peuvent être, au choix, mis en service et hors service en fonction de la puissance de chauffage sélectionnée.
  13. Procédé selon la revendication 12, caractérisé en ce que les n éléments de commutation (11, 21, 31, 41; 14, 24, 34) peuvent être mis en service et hors service au moyen d'un dispositif de commande (4) commun.
  14. Procédé selon la revendication 13, caractérisé en ce que les n éléments de commutation (11, 21, 31, 41) sont commandés par un dispositif de commande (4) présentant un nombre entier i de positions de commutation discrètes qui sont chacune attribuées à une combinaison des positions ouvertes et fermées des n éléments de commutation (11, 21, 31, 41).
EP97110879A 1996-07-09 1997-07-02 Procédé et dispositif de commande de la grandeur de la flamme des appareils de cuison à gaz Expired - Lifetime EP0818655B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627539A DE19627539A1 (de) 1996-07-09 1996-07-09 Verfahren und Vorrichtung zum Steuern der Flammengröße gasbetriebener Koch- oder Backgeräte
DE19627539 1996-07-09

Publications (3)

Publication Number Publication Date
EP0818655A2 EP0818655A2 (fr) 1998-01-14
EP0818655A3 EP0818655A3 (fr) 1998-03-18
EP0818655B1 true EP0818655B1 (fr) 2002-05-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97110879A Expired - Lifetime EP0818655B1 (fr) 1996-07-09 1997-07-02 Procédé et dispositif de commande de la grandeur de la flamme des appareils de cuison à gaz

Country Status (4)

Country Link
US (1) US5938425A (fr)
EP (1) EP0818655B1 (fr)
DE (2) DE19627539A1 (fr)
ES (1) ES2177862T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3220046A1 (fr) 2016-03-17 2017-09-20 BSH Hausgeräte GmbH Vanne de gaz et appareil de cuisson

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ES2177862T3 (es) 2002-12-16
EP0818655A3 (fr) 1998-03-18
US5938425A (en) 1999-08-17
DE19627539A1 (de) 1998-01-15
DE59707311D1 (de) 2002-06-27
EP0818655A2 (fr) 1998-01-14

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