US20060057520A1 - Control valve assembly for controlling gas flow in gas combustion systems - Google Patents

Control valve assembly for controlling gas flow in gas combustion systems Download PDF

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Publication number
US20060057520A1
US20060057520A1 US10/942,717 US94271704A US2006057520A1 US 20060057520 A1 US20060057520 A1 US 20060057520A1 US 94271704 A US94271704 A US 94271704A US 2006057520 A1 US2006057520 A1 US 2006057520A1
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US
United States
Prior art keywords
valve
gas flow
mems
gas
assembly
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.)
Abandoned
Application number
US10/942,717
Other languages
English (en)
Inventor
Richard Saia
David Najewicz
Charles Seeley
Guanghua Wu
Aaron Knobloch
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US10/942,717 priority Critical patent/US20060057520A1/en
Assigned to GENERAL ELECTRIC COMPANY reassignment GENERAL ELECTRIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAJEWICZ, DAVID JOSEPH, WU, GUANGHUA, KNOBLOCH, AARON JAY, SEELEY, CHARLES ERKLIN, SAIA, RICHARD JOSEPH
Priority to DE602005009625T priority patent/DE602005009625D1/de
Priority to EP05255503A priority patent/EP1640664B1/fr
Publication of US20060057520A1 publication Critical patent/US20060057520A1/en
Abandoned 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
    • 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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/03001—Miniaturized combustion devices using fluid fuels
    • 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

Definitions

  • the invention relates generally to gas combustion systems, and more particularly, to control of gas flow in a gas combustion system.
  • a gas cooking system receives a flammable gas flow from a supply and this flow of gas is directed to a gas burner of the gas cooking system.
  • Downstream combustion components, such as burners, require large cross-sections in the flow circuit to accommodate flow rates that enable high heat output.
  • the gas cooking system employs a flow control mechanism, such as a manual mechanical valve, for metering the gas flow from the supply to the gas burner.
  • a flow control mechanism such as a manual mechanical valve
  • Certain other natural gas combustion systems employ electronic control via solenoid actuated valves to regulate large flows of gas.
  • Such systems employ either a single continuously variable solenoid valve, or a series of on/off solenoid valves to regulate the flow.
  • MEMS micro electromechanical systems
  • Such MEMS valves are manufactured by employing batch fabrication processes such as those employed in the integrated circuit industry to fabricate mechanical or coupled electromechanical devices.
  • the use of such MEMS devices is advantageous for improved flow control at lower manufacturing cost.
  • designing such systems is challenging due to large actuation displacement requirements that are required for such systems as a large cross section area may be required in the flow circuit to accommodate high levels of flow. Further, it is difficult to achieve large actuation displacements with a small MEMS device.
  • a control valve assembly includes an inlet for receiving a gas flow and an outlet for providing the gas flow to a gas burner.
  • the assembly also includes a positive-shutoff valve for interrupting the gas flow from the inlet.
  • a micro electromechanical system (MEMS) valve is coupled in series to the positive-shutoff valve between the inlet and the outlet for regulating the gas flow from the inlet to the outlet.
  • MEMS micro electromechanical system
  • a method of controlling a gas flow in a gas combustion system with a gas burner includes receiving the gas flow via an inlet and controlling the gas flow from the inlet by opening and closing a positive-shutoff valve. The method also includes regulating the gas flow from the inlet to the gas burner via a MEMS valve when the positive shutoff valve is open.
  • FIG. 1 is a diagrammatical representation of a gas burner system with a control valve assembly for controlling a gas flow to a gas burner in accordance with aspects of the present technique
  • FIG. 2 is a diagrammatical representation of an exemplary control valve assembly for a gas combustion system in accordance with aspects of the present technique
  • FIG. 3 is an exploded view of the control valve assembly of FIG. 2 ;
  • FIG. 4 depicts an exemplary flow path of gas via the control valve assembly of FIG. 2 ;
  • FIG. 5 is a graphical representation of exemplary input voltage settings for the control valve assembly of FIG. 2 for a low flow control of gas in accordance with aspects of the present technique
  • FIG. 6 is a diagrammatical representation of an exemplary substrate employed to mount MEMS valve dies in accordance with aspects of the present technique
  • FIG. 7 is a diagrammatical representation of an exemplary sealing device for the substrate employed to mount the MEMS valve dies of FIG. 6 according to one aspect of the invention.
  • FIG. 8 is a sectional view of the sealing device of FIG. 7 ;
  • FIG. 9 is a diagrammatical representation of an exemplary substrate illustrating sealing features and assembly for the substrate of FIG. 6 according to another aspect of the invention.
  • FIG. 10 is a diagrammatical representation of an exemplary process for manufacturing of the substrate employed to mount the MEMS valve dies of FIG. 7 according to one aspect of the invention.
  • FIG. 11 is a diagrammatical representation of an exemplary process for manufacturing of the substrate employed to mount the MEMS valve dies of FIG. 7 according to another aspect of the invention.
  • FIG. 1 illustrates a gas burner system 10 with a control valve assembly, according to an embodiment, for use in a gas operated cooking appliance, such as, but not limited to, gas stove, gas hobs, and gas ovens.
  • the gas burner system 10 includes a series of components disposed in a housing 12 .
  • the gas burner system 10 receives a gas flow from a supply 14 via an inlet 16 and the gas flow is delivered to a gas burner 18 via an outlet 20 for use in various cooking activities.
  • a valve assembly 22 with a positive-shutoff valve 24 and a micro electromechanical system (MEMS) valve 26 is coupled between the inlet 16 and the outlet 20 for regulating the gas flow from the inlet 16 to the outlet 20 .
  • MEMS valve 26 is coupled in series to the positive-shutoff valve 24 .
  • the positive-shutoff valve 24 is disposed upstream of the MEMS valve 26 .
  • the MEMS valve 26 is mounted on a heat sinking substrate 28 that would be described in a greater detail below.
  • the gas burner system 10 includes a plurality of MEMS valves 26 that is coupled in parallel to provide a desired gas flow to the gas burner 18 .
  • the MEMS valve 26 is an electrothermal actuated plate valve.
  • the electrothermal actuated plate valve includes a plurality of slots disposed on a silicon die.
  • the gas flow via the slots may be regulated by opening or closing of the slots via a voltage input.
  • two electrothermal beams are adapted to cover the slots for closing of the slots.
  • the input voltage may result in thermal expansion of the electrothermal beams thereby opening the slots for passing the gas flow.
  • the illustrated valve facilitates an accurate control of the gas flow at both low flow and maximum flow conditions.
  • a control circuit 30 is coupled to the positive-shutoff valve 24 and to the MEMS valve 26 for controlling the gas flow via the positive-shutoff valve 24 and the MEMS valve 26 .
  • a user interface 32 may be coupled to the control circuit 30 for providing a user input to the control circuit 30 . Examples of such user interface 32 include knob control, keypad control, wireless interface, Internet connection and so forth.
  • the user input may include parameters for controlling the operation of the positive-shutoff valve 24 and the MEMS valve 26 .
  • a power supply (not shown) may be coupled to the MEMS valve 26 for controlling the actuation of the MEMS valve 26 via variable voltage, variable current or pulse width modulation (PWM).
  • control circuit 30 is adapted to regulate a heat output of the gas burner 18 based upon the user input.
  • the control circuit 30 may include a memory device (not shown) for storing internal references to control the gas flow to the gas burner 18 to achieve a desired burner output.
  • the internal references may include lookup tables, analytical functions and so forth.
  • the control circuit 30 utilizes the internal references to control the current, voltage or PWM for operating the MEMS valve 26 to achieve a desired burner heat output.
  • the gas burner system 10 receives a gas flow from the gas supply 14 for example, a gas supply network, gas cylinder, gas tank and so forth.
  • a regulator 34 disposed up stream of the valve assembly 22 regulates the gas flow received from the gas supply 14 before providing the gas flow to the gas burner 18 .
  • a lock-out valve 36 may be disposed upstream of the positive-shutoff valve 24 and the MEMS valve 26 for interrupting the gas flow from the supply 14 to the gas burner 18 .
  • the lock-out valve 36 is a solenoid valve.
  • the gas flow is directed to the positive-shutoff valve 24 that is adapted to interrupt the gas flow from the inlet 16 .
  • the positive-shutoff valve 24 is a solenoid valve.
  • the gas burner system 10 may include a plurality of positive-shutoff valves 24 for interrupting the gas flow to a plurality of burners 18 employed in the gas burner system 10 .
  • the operation of the positive-shutoff valve 24 is controlled by the control circuit 30 that controls the opening or closing of the positive-shutoff valve 24 as desired by a user of the gas burner system 10 .
  • control circuit 30 also controls the operation of the MEMS valve 26 to control the gas flow between the inlet 16 and the outlet 20 .
  • the MEMS valve 26 receives a continuous supply of power for regulating the gas flow between the inlet 16 and the outlet 20 .
  • the supply of power may result in generation of heat and it may be desirable to dissipate the generated heat away from the MEMS valve 26 .
  • the heat generated by the supply of power may be dissipated via the heat sinking substrate 28 .
  • the gas burner system 10 may employ a plurality of MEMS valves 26 coupled in parallel for providing a desired gas flow to the plurality of gas burners 18 .
  • the gas burner system 10 may include differently sized burners that may require different gas flows for their operation.
  • a plurality of MEMS valves 26 may be coupled together for providing a high gas flow to a gas burner 18 .
  • two MEMS valves 26 may be coupled in parallel to form a high flow valve 38 that is adapted to provide a desired gas flow to the burner 18 .
  • the two MEMS valves 26 coupled to form the high flow valve 38 may be controlled by a single input signal from the user interface 32 .
  • the MEMS valve 26 may include an orifice that is adapted to provide a desired gas flow for a burner simmer setting of the gas burner 18 .
  • the size of the orifice may be decided based upon the desired gas flow for a burner simmer setting of the gas burner 18 .
  • the regulated gas flow from the MEMS valve 26 may then be provided to a venturi assembly 40 of the gas burner 18 disposed over the cooktop 42 .
  • FIG. 2 illustrates an exemplary control valve assembly 44 for the gas burner system 10 of FIG. 1 .
  • the control valve assembly 22 includes sealing devices 46 and 48 to seal the heat sinking substrate 28 with the MEMS valve 26 between the inlet 16 and outlet 20 of the control valve assembly 44 .
  • the control valve assembly 44 may also include additional components such as, a middle plate 50 and a support plate 52 for supporting the positive-shutoff valve 24 . The assembly of these components is explained in a greater detail below with reference to FIG. 3 .
  • the positive-shutoff valves 24 may be coupled to the inlet 16 via the support plate 52 .
  • the middle plate 50 may be placed between the heat sinking substrate 28 and the inlet 16 .
  • a gasket 56 may be disposed between the middle plate 50 and the inlet 16 to seal the gas flow from the heat sinking substrate 28 .
  • sealing devices 46 and 48 are provided adjacent to the heat sinking substrate 28 to seal the gas flow from the heat sinking substrate 28 .
  • the sealing devices 46 and 48 are printed seals.
  • the sealing devices 46 and 48 are thermally conductive gaskets. Other suitable sealing devices may, of course, be employed.
  • FIG. 4 illustrates the flow path 58 of gas in the control valve assembly 22 of FIG. 2 .
  • the gas flow is received from a supply, as represented by the arrow 60 .
  • This flow of gas then is directed in a direction 62 to the gas burner system 10 via the inlet 16 .
  • the gas flow 64 within the gas burner system 10 is then regulated by the MEMS valve 26 with the positive-shutoff valve 24 in an open position, and the regulated flow of gas 66 is then fed to the gas burners 18 of the gas burner system 10 .
  • the MEMS valve 26 may include an orifice that is adapted to provide a desired gas flow for a burner simmer setting of the gas burner 18 .
  • FIG. 5 illustrates a graphical representation 68 of exemplary input voltage settings for the control valve assembly of FIG. 2 for a low flow control of gas in accordance with aspects of the present technique.
  • the abscissa axis 70 represents the input voltage for the operation of the control valve assembly 22 and the ordinate axis 72 represents the percentage of total flow of gas to the gas burner 18 .
  • the flow of gas in the gas burner system 10 with and without the orifice is represented by the curves 74 and 76 respectively.
  • the flow of gas may be controlled accurately in a condition where an orifice is in an always-open condition to provide a desired gas flow 78 for a burner simmer setting.
  • an accurate control of the input voltage settings may be required for low flow control of the gas when the orifice is not provided as can be seen from the curve 76 .
  • FIG. 6 illustrates a diagrammatical representation of an exemplary mounting board 80 for mounting of the MEMS valves 26 .
  • the mounting board 80 includes a substrate 82 that is adapted to dissipate the heat generated by the MEMS valve 26 .
  • the substrate 82 is aluminum.
  • a plurality of MEMS valves 26 may be mounted on the substrate 82 and traces 84 from each of the plurality of MEMS valves 26 are connected to an edge connector 86 .
  • the edge connector 86 may be coupled to the control circuit 30 (not shown) for controlling the operation of the plurality of the MEMS valves 26 .
  • the substrate 82 with the MEMS valves 26 as described above may be sealed to seal the gas flow from the substrate 82 via a sealing device.
  • FIG. 7 and FIG. 8 illustrate an exemplary substrate 88 with a sealing device 90 .
  • the sealing device 90 is an O-ring seal printed on the substrate 82 .
  • FIG. 8 illustrates a sectional view 92 of the substrate 88 with the O-ring seal 90 .
  • the sealing device 90 is a thermally conductive gasket.
  • the substrate 82 may include thermally conductive gaskets on both front and back sides of the substrate 82 .
  • the substrate 82 may have an O-ring seal on one side and a thermally conductive gasket on the other side.
  • FIG. 7 and FIG. 8 illustrate an exemplary substrate 88 with a sealing device 90 .
  • the sealing device 90 is an O-ring seal printed on the substrate 82 .
  • FIG. 8 illustrates a sectional view 92 of the substrate 88 with the O-ring seal 90 .
  • the inlet 16 and the outlet 20 include grooves 96 and 98 milled or otherwise formed on the inlet 16 and the outlet 20 respectively.
  • the grooves 96 and 98 may be used for positioning of the sealing device 90 on the inlet 16 and the outlet 20 .
  • a printed circuit board 100 with metal interconnect layers may be disposed between the grooves 96 and 98 and a thermally conductive adhesive 102 or other joining device may be used to couple the printed circuit board 100 with the substrate 82 .
  • the substrate 82 includes a dielectric polymer and metal interconnect layers disposed on the substrate 82 that will be described in detail below with reference to FIG. 10 and FIG. 11 .
  • FIG. 10 illustrates an exemplary process 104 for manufacturing the substrate 80 of FIG. 6 .
  • the process begins at step 106 where substrate 108 is selected and a dielectric polymer 110 is disposed on the substrate 108 .
  • the substrate 108 comprises aluminum.
  • a metallic interconnect 114 is disposed on the dielectric polymer 110 in a pre-determined pattern.
  • the metallic interconnect 114 comprises copper.
  • a solder mask 118 is disposed on the metallic interconnect 114 and the dielectric polymer 110 in a pre-determined pattern.
  • a layer of gold 122 may be plated on the metallic interconnect 114 .
  • the gold layer 122 is adapted to perform the function of an edge connector.
  • the substrate 108 along with the dielectric polymer 110 may be diced to create a cavity 126 .
  • a portion 130 of the dielectric polymer 110 may be milled out or otherwise removed.
  • a MEMS die 134 is placed over the milled portion 130 of the dielectric polymer 110 .
  • an adhesive 136 may be employed to couple the die 134 to the substrate 108 .
  • the die 134 is coupled to the substrate 108 via wire bonds 140 .
  • the valve assembly manufactured by the process described above may be employed for regulating a flow of gas 142 in the gas burner system 10 of FIG. 1 .
  • FIG. 11 illustrates another exemplary process 144 for manufacturing the substrate 80 of FIG. 6 .
  • the process begins with step 146 where a substrate 148 may be diced to form a cavity.
  • the substrate 148 comprises aluminum.
  • a printed circuit board (PCB) 152 is mounted on the substrate 148 via an adhesive material 154 .
  • a MEMS die 158 is placed on the substrate 148 via a thermally conductive adhesive material 160 .
  • the MEMS die 158 is coupled to the PCB 152 via wire bonds 164 .
  • a protective lid 166 may be provided to seal the substrate 148 .
  • the present system provides an efficient flow control of a gaseous medium with a positive-shutoff capability for a gas range or other system.
  • the system provides an accurate low flow control and a high flow control up to a maximum designed flow for such medium in the gas range system.
  • the various aspects of the method described hereinabove have utility in gas operated cooking appliances for example, gas cooktops, gas cookers, gas hobs, and gas ovens, among other applications.
  • the method described here may be advantageous for such systems for controlling the gas flow via the control valve assembly.
  • the method also provides an efficient mechanism for dissipating heat generated via such control valve assembly.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Feeding And Controlling Fuel (AREA)
US10/942,717 2004-09-16 2004-09-16 Control valve assembly for controlling gas flow in gas combustion systems Abandoned US20060057520A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/942,717 US20060057520A1 (en) 2004-09-16 2004-09-16 Control valve assembly for controlling gas flow in gas combustion systems
DE602005009625T DE602005009625D1 (de) 2004-09-16 2005-09-08 Steuerventilanordnung zur Regelung der Brennstoffzufuhr in einem Verbrennungssystem
EP05255503A EP1640664B1 (fr) 2004-09-16 2005-09-08 Arrangement de vanne de commande pour contrôler le débit de carburant dans un appareil de combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/942,717 US20060057520A1 (en) 2004-09-16 2004-09-16 Control valve assembly for controlling gas flow in gas combustion systems

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US20060057520A1 true US20060057520A1 (en) 2006-03-16

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EP (1) EP1640664B1 (fr)
DE (1) DE602005009625D1 (fr)

Cited By (19)

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US20060213496A1 (en) * 2005-03-24 2006-09-28 Robershaw Controls Company Multiple-output solenoid valve
US20070235020A1 (en) * 2006-03-07 2007-10-11 Hills Douglas E Multi-zone gas fireplace system and method for control
US20100132692A1 (en) * 2008-12-01 2010-06-03 Timothy Scott Shaffer Gas grill
US20110000477A1 (en) * 2007-12-05 2011-01-06 Kwon Jung-Ju Nozzle assembly and cooking appliance
US20110294078A1 (en) * 2010-05-31 2011-12-01 E.G.O. Elektro-Geratebau Gmbh Method for Controlling a Gas Burner and a Hob with Several Gas Burners
US20120118280A1 (en) * 2009-07-24 2012-05-17 BSH Bosch und Siemens Hausgeräte GmbH Switch of a gas valve unit
US20130059256A1 (en) * 2010-05-20 2013-03-07 BSH Bosch und Siemens Hausgeräte GmbH Gas valve unit having two gas outlets
US20130075237A1 (en) * 2011-09-28 2013-03-28 DigitalOptics Corporation MEMS Mems actuator/sensor
US20130153065A1 (en) * 2010-09-20 2013-06-20 BSH Bosch und Siemens Hausgeräte GmbH Structure of a gas-valve unit
CN103547865A (zh) * 2010-12-14 2014-01-29 Bsh博世和西门子家用电器有限公司 具有行程偏转系统的燃气阀单元
US8667988B2 (en) 2009-07-24 2014-03-11 Bsh Bosch Und Siemens Hausgeraete Gmbh Actuating mechanism of a gas valve unit
US8757203B2 (en) 2009-07-24 2014-06-24 Bsh Bosch Und Siemens Hausgeraete Gmbh Structure for a gas valve unit
US20140216581A1 (en) * 2011-09-16 2014-08-07 BSH Bosch und Siemens Hausgeräte GmbH Gas valve unit
US9316401B1 (en) * 2012-03-02 2016-04-19 Henry Guste Grill fireplace unit
US20170097159A1 (en) * 2015-10-06 2017-04-06 Illinois Tool Works Inc. Open top range and associated gas distribution system
US9932852B2 (en) 2011-08-08 2018-04-03 General Electric Company Sensor assembly for rotating devices and methods for fabricating
WO2018119451A1 (fr) * 2016-12-23 2018-06-28 Board Of Regents, The University Of Texas System Intégration hétérogène de composants sur des dispositifs compacts au moyen d'une métrologie à base de moiré par projection de franges et préhension et placement sous vide
US20190203942A1 (en) * 2018-01-02 2019-07-04 Haier Us Appliance Solutions, Inc. Cooktop appliance with a gas burner
US10782033B2 (en) * 2016-01-26 2020-09-22 Lennox Industries Inc. Heating furnace using gas pulse modulation temperature control mode

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SE533065C2 (sv) 2008-10-22 2010-06-22 Nanospace Ab Tryckavlastningsventil
DE102011108380B4 (de) * 2011-07-22 2016-07-07 Audi Ag Einrichtung zur Entlüftung und Belüftung eines Kraftstofftanks
EP2634485A1 (fr) * 2012-02-28 2013-09-04 Coprececitec, S.L. Vanne à gaz et procédé d'assemblage d'une vanne à gaz

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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060213496A1 (en) * 2005-03-24 2006-09-28 Robershaw Controls Company Multiple-output solenoid valve
US20070235020A1 (en) * 2006-03-07 2007-10-11 Hills Douglas E Multi-zone gas fireplace system and method for control
US20110000477A1 (en) * 2007-12-05 2011-01-06 Kwon Jung-Ju Nozzle assembly and cooking appliance
US8863734B2 (en) * 2008-12-01 2014-10-21 General Electric Company Gas grill
US20100132692A1 (en) * 2008-12-01 2010-06-03 Timothy Scott Shaffer Gas grill
US20120118280A1 (en) * 2009-07-24 2012-05-17 BSH Bosch und Siemens Hausgeräte GmbH Switch of a gas valve unit
US9513004B2 (en) * 2009-07-24 2016-12-06 BSH Hausgeräte GmbH Switch of a gas valve unit
US8667988B2 (en) 2009-07-24 2014-03-11 Bsh Bosch Und Siemens Hausgeraete Gmbh Actuating mechanism of a gas valve unit
US8757203B2 (en) 2009-07-24 2014-06-24 Bsh Bosch Und Siemens Hausgeraete Gmbh Structure for a gas valve unit
US20130059256A1 (en) * 2010-05-20 2013-03-07 BSH Bosch und Siemens Hausgeräte GmbH Gas valve unit having two gas outlets
US9822975B2 (en) * 2010-05-20 2017-11-21 BSH Hausgeräte GmbH Gas valve unit having two gas outlets
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Also Published As

Publication number Publication date
EP1640664A2 (fr) 2006-03-29
EP1640664A3 (fr) 2006-07-12
EP1640664B1 (fr) 2008-09-10
DE602005009625D1 (de) 2008-10-23

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