WO2013041454A1 - Appareil de cuisson à gaz et procédé associé audit appareil de cuisson à gaz - Google Patents

Appareil de cuisson à gaz et procédé associé audit appareil de cuisson à gaz Download PDF

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Publication number
WO2013041454A1
WO2013041454A1 PCT/EP2012/068045 EP2012068045W WO2013041454A1 WO 2013041454 A1 WO2013041454 A1 WO 2013041454A1 EP 2012068045 W EP2012068045 W EP 2012068045W WO 2013041454 A1 WO2013041454 A1 WO 2013041454A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
cooking appliance
burner
magnetic unit
coil
Prior art date
Application number
PCT/EP2012/068045
Other languages
English (en)
Inventor
Jesús Ignacio ERRASTI BADIOLA
Amaia Salbide Mutiloa
Original Assignee
Coprecitec, S.L.
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 Coprecitec, S.L. filed Critical Coprecitec, S.L.
Priority to EP12758506.5A priority Critical patent/EP2758715B1/fr
Priority to ES12758506T priority patent/ES2571378T3/es
Publication of WO2013041454A1 publication Critical patent/WO2013041454A1/fr

Links

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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/102—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/06—Fail safe for flame failures
    • 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
    • F23N2235/24—Valve details
    • 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

Definitions

  • This invention relates to gas cooking appliances, and in particular to gas cooking appliances that comprise a plurality of burners with a associated thermocouple.
  • thermocouples Gas cooking appliances that comprise safety valves supplied by thermocouples for their use in gas burners are known.
  • the thermocouple keeps the safety valve open for as long as there is a flame. In the event that the flame goes out, the safety valve closes, thereby cutting off the supply of gas.
  • the safety unit formed by the safety valve and the thermocouple creates an intrinsically safe device, as any type of fault in said safety unit causes the safety valve to close, cutting off the gas supply as a result.
  • Gas appliances that comprise a plurality of burners with a thermocouple and a associated regulation valve, and which also comprise a main valve that requires an electrical signal to keep said valve in the open position are also known.
  • ES2336402 A1 thus discloses a gas cooking appliance that comprises four burners, each one of which is connected to a thermocouple in order to detect the presence of a flame, as well as an actuator and a regulation valve. Said appliance also comprises a main valve suitable for blocking the supply of gas to the various regulation valves and which is supplied in order to keep it in its open position by an electrical signal generated in a control unit.
  • the gas cooking appliance of the invention comprises a plurality of burners where each burner is associated to at least one actuator and a thermocouple.
  • the actuator opens or closes the corresponding burner when a user acts on said actuator.
  • the thermocouple generates an electrical signal when it detects a flame in the corresponding burner.
  • the cooking appliance also comprises at least one main valve that comprises a safety system that comprises a magnetic unit. Said magnetic unit is controlled according to the signals of the thermocouples, where it is supplied directly and sequentially by the thermocouples whose burners have been opened by acting on the corresponding actuator.
  • the gas cooking appliance of the invention a cooking appliance with an economical safety system is achieved due to the fact that the cooking appliance is able to manage the electrical signals of the different thermocouples in order to supply a single magnetic unit.
  • the cost of the regulation valves of each burner is also reduced significantly, as it is not necessary for said valves to comprise a magnetic unit in order to comply with the corresponding safety regulation.
  • the maintenance of said valves is also made easier due to the fact that as they are simpler valves, the risk of them becoming faulty is also reduced.
  • Figure 1 shows, partially, perspective view of a gas cooking appliance.
  • FIG. 2 schematically shows an embodiment of the invention that may be implemented in the cooking appliance of Figure 1.
  • the gas cooking appliance of the invention comprises a plurality of burners 1 and a regulation valve (not shown in the figures) associated to each burner 1 and suitable for opening, closing and/or adjusting the gas flow of said burner 1 .
  • the cooking appliance 100 also comprises a main valve (not shown in the figures) where the gas flow that passes through each regulation valve passes through the main valve first of all. As a result, if the main valve is closed, no gas passes through to the regulation valves and, therefore, to the burners 1.
  • Said main valve comprises a safety system that comprises a magnetic unit 5.
  • the safety regulations relating to gas cooking appliances are met in a reliable and economical manner, as the apparatus operates with a single magnetic unit, considerably reducing the cost of the appliance.
  • the regulation valves are also simpler, as they do not comprise the magnetic unit, thereby reducing the risk of them becoming faulty, which also reduces the maintenance of the gas cooking appliance.
  • FIG 1 shows an example of a gas cooking appliance that comprises four burners 1 .
  • the cooking appliance also comprises an actuator 2 and a thermocouple 4 (shown schematically in Figure 2) associated to each burner 1 .
  • the actuator 2 opens or closes the corresponding regulation valve, which in turn opens or closes the corresponding burner 1 when a user acts on said actuator 2.
  • the thermocouple 4 generates an electrical signal when it detects a flame in the burner 1 .
  • the magnetic unit 5 of the invention comprises a first coil 10, which is supplied by said electrical signal, in such a way that the magnetic unit 5 is supplied directly and sequentially by the thermocouples 4 whose burners 1 have been opened by acting on the corresponding actuator 2.
  • the magnetic unit 5 also comprises a second coil 11 for detecting the state (open/closed) of the main valve.
  • the gas cooking appliance 100 of the invention comprises, in this embodiment, pulsing means (not shown in the figures), which open said main valve manually.
  • ignition means 9 are also activated and light the corresponding burner 1 thanks to a spark plug, not shown in the figures, disposed close to the burner 1.
  • the user must keep said pulsing means actuated for a sufficient period of time so that the electrical signal generated in the corresponding thermocouple 4 may supply by itself the magnetic unit 5.
  • the cooking apparatus 100 comprises display means, not shown in the figures, which notify the user, for example, that they can stop acting on the pulsing means.
  • thermocouples 4 that were supplying the first coil 10 of the magnetic unit 5 stop supplying said magnetic unit 5 and the main valve is closed automatically.
  • specific means to force the closure of the main valve, although said alternative is not ruled out as it may, in an emergency, be especially advantageous to obtain a single means that switches off the entire cooking appliance 100.
  • the gas cooking appliance 100 of the invention also comprises an actuation switch 3, shown schematically in figure 2, associated to each burner 1 and which changes state when the user acts on the corresponding actuator 2.
  • an actuation switch 3 shown schematically in figure 2 associated to each burner 1 and which changes state when the user acts on the corresponding actuator 2.
  • the gas cooking appliance 100 comprises control means 7, shown schematically in figure 2, which detect the state of said actuation switches 3 and act on supply switches 6 that are associated to each thermocouple 4.
  • Each supply switch 6 opens or closes the flow of current of the associated thermocouple 4, supplying the first coil 10 of the magnetic unit 5 when the flow of current is allowed.
  • control means 7 detect, through the actuation switches 3, that one or more burners 1 are open, they act on the corresponding supply switches 6, permuting them sequentially with the result that the first coil 10 of the magnetic unit 5 is reached only by the electrical signal of a single thermocouple 4.
  • the permuting interval of said supply switches 6 is the minimum that guarantees the supply of the first coil 10 of the magnetic unit 5 and ensures the detection of faults, such as an unwanted shutdown of a burner 1.
  • the gas cooking appliance 100 of the invention also comprises a current sensor 8 associated to the magnetic unit 5.
  • Said current sensor 8 shown graphically in figure 2, detects the current I that reaches the first coil 10 of the magnetic unit 5 through the different thermocouples 4. If, for example, in the preferred embodiment of the invention, two burners are lit, the value of the detected current I will vary sequentially, as the supply switches 6 are permuted, between the electrical signal of the thermocouple 4 of the first burner 1 and the electrical signal of the thermocouple 4 of the second burner 1. As a result, the current I detected by the current sensor 8 is unique and is which supplies the first coil 10 of the magnetic unit 5.
  • said current I detected by the current sensor 8
  • the ignition means 9 are activated for a preset TSAFETY time in order to reignit the burners 1 before the main valve is closed definitely.
  • said reignition phase only the burners 1 whose flames have been shutdown in an unwanted manner are lit, in other words, those burners 1 whose regulation valve is open (or the actuator 2 actuated) and the corresponding thermocouple 4 does not generate an electrical signal.
  • the main valve closes without activating any reignition phase.
  • the control means 7 do not act on the supply switches 6 until all the burners 1 have been closed, the actuators 2 being acted on for this purpose.
  • the display means (not shown in the figures) warn the user of the fault so that they can rectify the problem.
  • the control means 7 when the main valve is closed either because the user has closed all the open burners 1 voluntarily by acting on the corresponding actuators 2, or because the flame of an open burner 1 has been shutdown in an involuntary and unwanted manner, the control means 7 send a temporary electrical signal ( ⁇ ) that supplies the second coil 1 1 of the magnetic unit 5 in order to detect the state of the main valve.
  • the control means 7 read the voltage between the terminals of the second coil 11 and compare it with the voltage the coil 1 1 should have between the terminals if that the main valve were closed (the comparison can also be made in the event that the main valve is open). As a result, the control means 7 identify if the real state of the main valve coincides with the state that corresponds to it.
  • control means 7 detect an operational fault in the cooking appliance 1 and the display means (not shown in the figures) warn the user of said fault so that they can take the necessary steps (eg, close the gas flow manually and notify the technical service).
  • the cooking appliance 1 is able to detect possible gas leaks in an easy, efficient and economical manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)

Abstract

L'invention porte sur un appareil de cuisson à gaz, lequel appareil comprend une pluralité de brûleurs, chaque brûleur étant associé à au moins un actionneur et à un thermocouple (4). L'actionneur ouvre ou ferme le brûleur correspondant quand un utilisateur agit sur ledit actionneur. Le thermocouple (4) génère un signal électrique quand il détecte une flamme dans le brûleur correspondant. L'appareil de cuisson comprend au moins une vanne principale qui comprend un système de sécurité qui comprend une unité magnétique (5). Ladite unité magnétique est commandée en fonction des signaux des thermocouples (4), ceux-ci étant alimentés directement et en séquence par les thermocouples (4) dont les brûleurs ont été ouverts par l'actionnement de l'actionneur correspondant.
PCT/EP2012/068045 2011-09-20 2012-09-14 Appareil de cuisson à gaz et procédé associé audit appareil de cuisson à gaz WO2013041454A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12758506.5A EP2758715B1 (fr) 2011-09-20 2012-09-14 Appareil de cuisson à gaz et procédé associé audit appareil de cuisson à gaz
ES12758506T ES2571378T3 (es) 2011-09-20 2012-09-14 Aparato de cocción a gas y método asociado a dicho aparato de cocción a gas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201131513 2011-09-20
ES201131513A ES2399893B1 (es) 2011-09-20 2011-09-20 Aparato de cocción a gas y método asociado a dicho aparato de cocción a gas

Publications (1)

Publication Number Publication Date
WO2013041454A1 true WO2013041454A1 (fr) 2013-03-28

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ID=46832432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/068045 WO2013041454A1 (fr) 2011-09-20 2012-09-14 Appareil de cuisson à gaz et procédé associé audit appareil de cuisson à gaz

Country Status (3)

Country Link
EP (1) EP2758715B1 (fr)
ES (2) ES2399893B1 (fr)
WO (1) WO2013041454A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6164958A (en) * 1999-09-20 2000-12-26 Huang; Tai-Tung Safety system for gas range
WO2009037132A1 (fr) * 2007-09-17 2009-03-26 BSH Bosch und Siemens Hausgeräte GmbH Ensemble plaque de cuisson à gaz
WO2009146730A2 (fr) * 2008-05-02 2009-12-10 Coprecitec, S.L. Unité de distribution de gaz pour appareil de cuisson
WO2011080218A1 (fr) * 2009-12-31 2011-07-07 BSH Bosch und Siemens Hausgeräte GmbH Procédé et système permettant d'augmenter la sécurité relative à des dispositifs de cuisson fonctionnant au gaz

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6164958A (en) * 1999-09-20 2000-12-26 Huang; Tai-Tung Safety system for gas range
WO2009037132A1 (fr) * 2007-09-17 2009-03-26 BSH Bosch und Siemens Hausgeräte GmbH Ensemble plaque de cuisson à gaz
ES2336402A1 (es) 2007-09-17 2010-04-12 Bsh Electrodomesticos España, S.A. Disposicion de dispositivo de coccion a gas.
WO2009146730A2 (fr) * 2008-05-02 2009-12-10 Coprecitec, S.L. Unité de distribution de gaz pour appareil de cuisson
WO2011080218A1 (fr) * 2009-12-31 2011-07-07 BSH Bosch und Siemens Hausgeräte GmbH Procédé et système permettant d'augmenter la sécurité relative à des dispositifs de cuisson fonctionnant au gaz

Also Published As

Publication number Publication date
ES2399893R1 (es) 2013-10-15
EP2758715B1 (fr) 2016-04-06
ES2399893A2 (es) 2013-04-04
EP2758715A1 (fr) 2014-07-30
ES2571378T3 (es) 2016-05-25
ES2399893B1 (es) 2014-09-02

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