EP3771865A1 - Gasvorrichtung zum garen von lebensmitteln und verfahren zum betrieb dieser vorrichtung - Google Patents

Gasvorrichtung zum garen von lebensmitteln und verfahren zum betrieb dieser vorrichtung Download PDF

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Publication number
EP3771865A1
EP3771865A1 EP20188841.9A EP20188841A EP3771865A1 EP 3771865 A1 EP3771865 A1 EP 3771865A1 EP 20188841 A EP20188841 A EP 20188841A EP 3771865 A1 EP3771865 A1 EP 3771865A1
Authority
EP
European Patent Office
Prior art keywords
safety valve
flame
sensor
burner
safety
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.)
Pending
Application number
EP20188841.9A
Other languages
English (en)
French (fr)
Inventor
Paolo MOCELLIN
Chiara VIANELLO
Carlo Zambruni
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.)
Smeg SpA
Original Assignee
Smeg SpA
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 Smeg SpA filed Critical Smeg SpA
Publication of EP3771865A1 publication Critical patent/EP3771865A1/de
Pending legal-status Critical Current

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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
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • 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
    • F24C3/128—Arrangement or mounting of control or safety devices on ranges in baking ovens
    • 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
    • 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

Definitions

  • the invention relates to a gas device for cooking food and to a method for operating a gas cooking device.
  • the invention relates to gas cooking devices such as stoves, ovens and kitchens.
  • Gas food cooking devices are usually provided with one or more safety systems, which are designed to avoid dangerous situations.
  • one of the most common safety system entails interrupting the supply of gas to the burner in which the flame is extinguished, which is generally detected by means of a flame sensor.
  • the object of the invention is to provide a gas food cooking device, which is not affected by the drawbacks of the prior art discussed above; in particular, the object of the invention is to provide a gas food cooking device, which is safer than currently known devices and forbids uncontrolled gas outflows.
  • the invention relates to a gas device for cooking food comprising:
  • an automatic general blocking valve blocking the supply of gas and located just downstream of the connection to the domestic line ensures the totally safe operation of the cooking device.
  • the second safety system ensures the complete safety of the cooking device.
  • the object of the invention is to provide a method for operating a gas food cooking device, which is safe compared to known methods and forbids uncontrolled gas outflows.
  • the invention relates to a method for operating a gas food cooking device as claimed in claim 10.
  • reference number 1 indicates a gas food cooking device according to the invention.
  • the cooking device is a stove.
  • the cooking device 1 comprises a main gas supply duct 2, which is configured to be coupled to a domestic gas supply circuit 3 (which is schematically shown), at least one gas burner 4, which is connected to the main gas supply duct 2 by means of at least one connection valve 5, an ignition device 7, which is configured to selectively generate a spark 11d in the area of the burner 4, a safety assembly 9 and a casing 6 (which is schematically shown).
  • the device 1 comprises a plurality of gas burners 4, each connected to the main gas supply duct 2 by means of a respective connection valve 5.
  • connection valve 5 is an adjustment valve, which is controlled by a respective actuator 10.
  • the actuator 10 is a knob.
  • the manual adjustment of the actuator 10 determines the adjustment of the position of the respective connection valve 5. In this way, the quantity of gas supplied to the burner 4 and, as a consequence, the flame of the burner 4 are adjusted.
  • the ignition device 7 is schematically shown in figure 1 by a broken line, whereas it is better visible in figure 2 .
  • the ignition device 7 comprises a catenary 8, which comprises a pair of power supply cables 11a and a plurality of control switches 11b, which are connected in parallel between said cables 11a.
  • the catenary comprises one switch 11b for each actuator 10.
  • Each switch 11b is operated by a respective actuator 10. When a pressure is applied to the actuator 10, this normally determines the closing of the respective switch 11b of the catenary 8. In this way, an electrical connection is established between the power supply cables 11a so as to activate a known igniting circuit 11c, which ignites a series of sparks 11d in the area of the respective burner 4.
  • the switches of the catenary 8 basically work as normally open switches.
  • the casing 6 houses at least one portion of the main gas supply duct 2, the connection valves 5, the ignition device 7 and, preferably, also part of the safety device 9, as discussed more in detail below.
  • the burners 4 and the actuators 10 On the outside of the casing 6 there are the burners 4 and the actuators 10.
  • the safety assembly 9 comprises a safety valve 12 and a control device 13, which is configured to adjust the position of the safety valve 12.
  • the safety valve 12 is an ON/OFF valve located along the main gas supply duct 2 upstream of said at least one connection valve 5. In the case discussed herein by way of example, there are different connection valves 5 and the safety valve 12 is located upstream of all connection valves 5.
  • the safety valve 12 is located just downstream of the connection to the domestic gas supply circuit 3.
  • the safety valve 12 is preferably arranged at a safety distance from the burners 4 or from possible hot areas of the cooking device 1.
  • the safety valve 12 is preferably housed outside the casing 6.
  • the body of the safety valve 12 is outside the casing 6, whereas the electric drive of the safety valve 12 and the control device 13 are preferably housed inside the casing 6.
  • the control device 13 is configured to open the safety valve 12 when the ignition device 7 is activated and to close the safety valve 12 when given conditions occur.
  • control device 13 is configured to open the safety valve 12 when at least one switch 11b of the catenary 8 of the ignition device 7 is closed by means of the respective actuator 10.
  • the safety valve 12 is a normally closed solenoid valve, which is opened when the ignition device 7 is activated.
  • the closing is regulated by the control device 13.
  • control device 13 is configured to close the safety valve 12 in response to the operating conditions of at least one control element.
  • control device 13 is configured to close the safety valve 12 based on the value of at least one operating parameter detected by means of at least one sensor 16.
  • control device 13 receives signals from a plurality of sensors 16.
  • the sensor 16 is a flame sensor arranged close to a respective burner 4.
  • each burner 4 is associated with a sensor 16.
  • the flame sensor 16 is in an OFF state when it does not detect any flame, whereas it is in an ON state when it detects the presence of a flame.
  • Each flame sensor 16 preferably comprises a thermocouple.
  • control device 13 is configured so as to close the safety valve 12 if all sensors 16 do not detect any flame following an attempt of ignition.
  • the safety valve 12 is closed if an attempt of ignition (by means of the activation of the ignition device 7) is not followed by an actual ignition.
  • control device 13 is preferably configured to activate the ignition device 7 when the flame extinguishes during the operation of at least one burner 4.
  • the control device 13 activates the ignition device 7.
  • the control device 13 is provided with an activation module 17 (shown in figure 1 ), which is configured to activate the ignition device 7.
  • the safety valve 12 is immediately closed. In case there is at least one flame sensor 16 in the ON state (cooking currently happening), the safety valve 12 remains open and the connection valve 5 supplying the burner 4 is closed so that the latter cannot be ignited again.
  • the closing of the connection valve 5 is preferably regulated by a further control (not shown), which is directly associated with the flame sensor 16. This logic is schematically shown in the flowchart of figure 4 .
  • the safety assembly 9 is provided with a first safety system and with a second safety system.
  • the first safety system comprises a flame sensor 16 and a respective first control device (not shown), which is configured to close the respective connection valve 5 when the flame sensor detects that the flame has extinguished.
  • the second safety system comprises the ON/OFF safety valve 12 located along the main duct 2 upstream of said at least one connection valve 5; at least one control element and a second control device 13, which is configured to adjust the position of the safety valve 12 in response to the operating conditions of the control element.
  • the second control device 13 is independent of the first control device.
  • the second control device 13 operates in an independent manner and in parallel relative to the first control device.
  • the safety device 9 tries to re-ignite it in order to continue the cooking. If this attempt is not successful, the connection valve 5 and the safety valve 12 are closed so as to avoid uncontrolled gas outflows.
  • control device 13 can receive signals from further and/or different control elements and can be configured to close the safety valve 12 based on the conditions of these control elements.
  • control device can also be configured to close the safety valve 12 after a given amount of time starting from the opening of the safety valve 12.
  • the control device 13 closes the safety valve 12 when the counter 15 (whose count is activated simultaneously with the opening of the safety valve 12) reaches a given value.
  • the programmed count can be of at least 4 hours.
  • FIG. 5 schematically shows a different cooking device 20.
  • the cooking device 20 is a gas oven, which comprises a main gas supply duct 22, which is configured to be coupled to a domestic gas supply circuit 23 (which is schematically shown), at least one gas burner 24, which is connected to the main gas supply duct 22 by means of at least one connection valve 25, an ignition device 27, which is configured to selectively generate a spark 11d in the area of the burner 24, a safety assembly 29 and a casing 26 (which is schematically shown).
  • the device 20 comprises a burner 24, which is arranged so as to heat a cooking chamber 30. According to a variant, which is not shown herein, the device 20 comprises more than one burner.
  • connection valve 25 is an adjustment valve, which is controlled by an actuator 31.
  • the actuator 31 is a knob.
  • the manual adjustment of the actuator 31 determines the adjustment of the position of the respective connection valve 25. In this way, the quantity of gas supplied to the burner 24 and, as a consequence, the flame of the burner 24 are adjusted.
  • the ignition device 27 is schematically shown by a broken line and substantially has a structure that is similar to the one of the ignition device 7 described with reference to the cooking device 1.
  • the casing 26 houses at least one portion of the main gas supply duct 22, the connection valve 25, the ignition device 27 and, preferably, also part of the safety device 29, as discussed more in detail below.
  • the actuator 31 On the outside of the casing 6 there is the actuator 31.
  • the safety assembly 29 comprises a safety valve 32 and a control device 33, which is configured to adjust the position of the safety valve 32.
  • the safety valve 32 is an ON/OFF valve located along the main gas supply duct 22 upstream of said at least one connection valve 25.
  • the safety valve 32 is located just downstream of the connection to the domestic gas supply circuit 23.
  • the safety valve 32 is preferably arranged at a safety distance from the burners 24 or from possible hot areas of the cooking device 20 (such as for example the cooking chamber 30).
  • the safety valve 32 is preferably housed outside the casing 26.
  • the body of the safety valve 32 is outside the casing 26, whereas the electric drive of the safety valve 32 and the control device 33 are preferably housed inside the casing 26.
  • the control device 33 is configured to open the safety valve 32 when the ignition device 27 is activated and to close the safety valve 32 based on the conditions of at least one control element.
  • the safety valve 32 is a normally closed valve, which is opened when the ignition device 27 is activated.
  • the closing is regulated by the control device 33.
  • control device 33 is substantially configured similarly to the control device 13 of the cooking device 1.
  • control device 33 is configured to close the safety valve 32 in response to the operating conditions of at least one control element.
  • control device 33 is configured to close the safety valve 12 based on the value of at least one operating parameter detected by means of at least one sensor 36.
  • the sensor 36 preferably is a flame sensor, which is located close to the burner 24.
  • the flame sensor 36 is in an OFF state when it does not detect any flame, whereas it is in an ON state when it detects the presence of a flame.
  • Each flame sensor 36 preferably comprises a thermocouple.
  • control device 33 is configured so as to close the safety valve 32 if the sensor 36 does not detect any flame following an attempt of ignition.
  • the safety valve 32 is closed if an attempt of ignition (by means of the activation of the ignition device 27) is not followed by an actual ignition.
  • the safety valve 32 (which was opened upon activation of the ignition device 27) is immediately closed.
  • connection valve 5 is preferably regulated by a further control, which is directly associated with the flame sensor 36.
  • control device 33 is preferably configured to activate the ignition device 27 when the flame extinguishes during the operation of the burner 24.
  • the control device 33 activates the ignition device 27. If the flame sensor 36 does not switch to the ON state within a given amount of time T, the safety valve 32 is immediately closed.
  • the safety device 29 tries to re-ignite it in order to continue the cooking. If this attempt is not successful, the safety valve 32 is closed so as to avoid uncontrolled gas outflows.
  • the closing logic of the safety valve 32 is the same as the one adopted for the stove 1. In other words, if there are different burners, the safety valve 32 is closed only if the remaining burners are in an OFF state as well, otherwise the sole connection valve 25 supplying the burner that cannot be re-ignited is closed.
  • the safety assembly 29 is provided with a first safety system and with a second safety system.
  • the first safety system comprises the flame sensor 36 and a respective first control device (not shown in detail), which is configured to close the respective connection valve 25 when the flame sensor detects that the flame has extinguished.
  • the second safety system comprises the ON/OFF safety valve 32 located along the main duct 22 upstream of said at least one connection valve 25; at least one control element and a second control device 33, which is configured to adjust the position of the safety valve 32 in response to the operating conditions of the control element.
  • the second control device 33 is independent of the first control device.
  • the second control device 33 operates in an independent manner and in parallel relative to the first control device.
  • control device 33 can receive signals from further and/or different control elements and can be configured to close the safety valve 32 based on the conditions of these control elements.
  • control device 33 can also be configured to close the safety valve 32 after a given amount of time starting from the opening of the safety valve 32.
  • control device 33 can also be configured to close the safety valve 32 based on the temperature value detected by a suitable temperature sensor 37 located so as to detect a temperature value related to the temperature on the inside of the cooking chamber 30.
  • a suitable temperature sensor 37 located so as to detect a temperature value related to the temperature on the inside of the cooking chamber 30.
  • the temperature sensor 37 can be located on the inside or on the outside of the cooking chamber 30.
  • the temperature sensor 37 is the thermocouple of the flame sensor 36.
  • the control device 33 closes the safety valve 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Baking, Grill, Roasting (AREA)
EP20188841.9A 2019-07-31 2020-07-31 Gasvorrichtung zum garen von lebensmitteln und verfahren zum betrieb dieser vorrichtung Pending EP3771865A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000013521A IT201900013521A1 (it) 2019-07-31 2019-07-31 Dispositivo per la cottura dei cibi a gas e metodo per operare detto dispositivo

Publications (1)

Publication Number Publication Date
EP3771865A1 true EP3771865A1 (de) 2021-02-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20188841.9A Pending EP3771865A1 (de) 2019-07-31 2020-07-31 Gasvorrichtung zum garen von lebensmitteln und verfahren zum betrieb dieser vorrichtung

Country Status (3)

Country Link
EP (1) EP3771865A1 (de)
CN (1) CN213746839U (de)
IT (1) IT201900013521A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023177365A1 (en) * 2022-03-15 2023-09-21 Femas Metal San. Ve Tic. A.S. A dual burner gas oven

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60235918A (ja) * 1984-05-08 1985-11-22 Matsushita Electric Ind Co Ltd タイマ付ガステ−ブルコンロ
EP0790467A1 (de) * 1996-02-15 1997-08-20 Eaton S.A.M. Sicherheitsvorrichtung an Gasheizungen und Gaskochern
WO2007064893A2 (en) * 2005-12-02 2007-06-07 Robertshaw Controls Company Gas cook-top with glass (capacitive) touch controls and automatic burner re-ignition
WO2009146730A2 (en) 2008-05-02 2009-12-10 Coprecitec, S.L. Gas distribution unit for a cooking appliance
JP2011047611A (ja) 2009-08-28 2011-03-10 Harman Pro:Kk 加熱調理器
JP2015014415A (ja) * 2013-07-04 2015-01-22 リンナイ株式会社 ガスコンロ
JP2015219002A (ja) * 2014-05-21 2015-12-07 リンナイ株式会社 ガス調理器
JP2019066119A (ja) * 2017-10-03 2019-04-25 リンナイ株式会社 加熱調理器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563457A (en) * 1970-03-13 1971-02-16 Harper Wyman Co Oven control with shutoff for standing pilot

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60235918A (ja) * 1984-05-08 1985-11-22 Matsushita Electric Ind Co Ltd タイマ付ガステ−ブルコンロ
EP0790467A1 (de) * 1996-02-15 1997-08-20 Eaton S.A.M. Sicherheitsvorrichtung an Gasheizungen und Gaskochern
WO2007064893A2 (en) * 2005-12-02 2007-06-07 Robertshaw Controls Company Gas cook-top with glass (capacitive) touch controls and automatic burner re-ignition
WO2009146730A2 (en) 2008-05-02 2009-12-10 Coprecitec, S.L. Gas distribution unit for a cooking appliance
JP2011047611A (ja) 2009-08-28 2011-03-10 Harman Pro:Kk 加熱調理器
JP2015014415A (ja) * 2013-07-04 2015-01-22 リンナイ株式会社 ガスコンロ
JP2015219002A (ja) * 2014-05-21 2015-12-07 リンナイ株式会社 ガス調理器
JP2019066119A (ja) * 2017-10-03 2019-04-25 リンナイ株式会社 加熱調理器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023177365A1 (en) * 2022-03-15 2023-09-21 Femas Metal San. Ve Tic. A.S. A dual burner gas oven

Also Published As

Publication number Publication date
IT201900013521A1 (it) 2021-01-31
CN213746839U (zh) 2021-07-20

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