EP2383520A2 - Vanne de gaz dotée d'un dispositif d'allumage - Google Patents

Vanne de gaz dotée d'un dispositif d'allumage Download PDF

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Publication number
EP2383520A2
EP2383520A2 EP11162450A EP11162450A EP2383520A2 EP 2383520 A2 EP2383520 A2 EP 2383520A2 EP 11162450 A EP11162450 A EP 11162450A EP 11162450 A EP11162450 A EP 11162450A EP 2383520 A2 EP2383520 A2 EP 2383520A2
Authority
EP
European Patent Office
Prior art keywords
gas valve
actuating shaft
adjusting element
ignition device
actuating
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Withdrawn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
EP11162450A
Other languages
German (de)
English (en)
Other versions
EP2383520A3 (fr
Inventor
Luis Alberto Abascal Carrera
Roberto Carballo Fernandez
Javier Corral Ricalde
Silvia Diez Marquina
Armando Jimenez-Eguizabal Mota
Carlos Pelayo Alonso
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
Priority to EP11162450A priority Critical patent/EP2383520A3/fr
Publication of EP2383520A2 publication Critical patent/EP2383520A2/fr
Publication of EP2383520A3 publication Critical patent/EP2383520A3/fr
Withdrawn legal-status Critical Current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
    • F24C3/10—Arrangement or mounting of ignition devices
    • F24C3/103—Arrangement or mounting of ignition devices of electric ignition devices
    • 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
    • F24C3/124—Control panels

Definitions

  • the invention relates to a gas valve with ignition device.
  • Gas valves are used in particular in gas-fired cooking appliances, such as cooktops, gas ovens or gas stoves.
  • the gas valve With the gas valve, the gas volume flow flowing to one or more gas burners of the cooking appliance is set between zero and a maximum value. This is done by rotating an actuating shaft of the gas valve, which is also referred to as a cock shaft, about its longitudinal axis.
  • the gas valve further comprises an electrical switch, which is actuated by pressing the actuating shaft in the axial direction.
  • the electrical switch is part of an ignition device for igniting the gas stream exiting at the gas burner. Every time a user presses the actuating shaft of the gas valve, the ignition device generates electrical sparks in the region of the gas burner.
  • a gas valve is for example in the EP 1 500 881 A2 described.
  • a disadvantage of these types of gas-fired cooking appliances is that the ignition can be done in any angular position of the actuating shaft. Since at the same time, however, the gas volume flow is adjusted by the angular position of the actuating shaft, this means that even with low gas flow rates of the electric switch is actuated. However, ignition can not be reliably ensured due to the low gas volume flow, so that it can come to a discharge of unburned gas from the gas burner.
  • the present invention is therefore based on the object to provide an ignition device for a gas valve with an actuating element, wherein the ignition device can be actuated only at defined operating conditions of the gas valve.
  • the invention is based on the finding that this object can be achieved by using an ignition system which has an adjustment element which prevents an actuation of the ignition device, in particular an electrical switch in at least one position of the adjustment.
  • a gas valve with ignition device comprising an actuating shaft which is rotatable about an axis for defining an opening cross-section of the gas valve and is displaceable for actuating the ignition device in the axial direction.
  • the gas valve is characterized in that the ignition device comprises a setting element for setting a blocking state in which the axial displacement of the actuating shaft is prevented.
  • an ignition device is understood to mean a device by means of which a gas stream is ignited on the burner (s).
  • the ignition device preferably comprises at least one electrical switch for activating an ignition element, which generates ignition sparks.
  • the ignition device comprises an actuating shaft, which is displaceable for actuating the ignition device, in particular for actuating the electrical switch along the longitudinal axis of the actuating shaft.
  • an element is referred to, which is included in the ignition device and which prevents the axial displacement of the actuating shaft in one or more predetermined situations.
  • the state in which the axial displacement of the actuating shaft is prevented is also referred to as a blocking state according to the invention.
  • the actuation of the ignition device can be prevented or permitted.
  • the operation of the ignition device can be limited to situations in which the conditions in the gas valve provide sufficient safety.
  • the state in which the adjusting element permits actuation of the ignition device is also referred to below as the ignition state.
  • the ignition state is preferably the state in which the gas volume flow in the gas valve to the burner is set to a maximum value. This will be safe provided that sufficient gas is available for ignition by the electric spark on the burner. For gas volume flows of lesser amount, however, the setting element is in the blocking state. This prevents the user of the device with low gas flow rates unsuccessfully trying to trigger the ignition, resulting in an unwanted gas leakage.
  • the blocking state is produced according to the invention by the adjusting element.
  • the adjusting element In the locked state, the adjusting element is in a blocking position.
  • the adjustment In the ignition state, however, the adjustment is in a position which is also referred to as the ignition position.
  • the adjusting element is attached to the actuating shaft.
  • the blocking state and the ignition state can be adjusted in a simple manner depending on the angular position of the actuating shaft. Since the angular position of the actuating shaft defines the opening cross section of the gas valve and thus defines the gas volume flow, which is passed to the burner, the ignition state can be limited to large gas flow rates.
  • the attachment of the adjusting element on the actuating shaft has the advantage that the required number of parts for the gas valve according to the invention, which is required in the final assembly of the gas valve, is minimized.
  • the attachment of the adjusting element on the actuating shaft which is axially movable, also allows actuation of the ignition device directly or indirectly by the adjustment.
  • the adjusting element has a cup shape.
  • the cup shape can also be referred to as a bell shape.
  • This embodiment has the advantage that the adjusting element has a plurality of surfaces arranged in different axial positions, which can perform different functions.
  • the lower edge of the adjusting element in the blocking state serve as a support surface for supporting the adjusting element on a housing of the gas valve and thus prevent the axial movement of the actuating shaft.
  • the inside of the cup shape may serve to support and protect other components, such as a spring, that is disposed about the actuating shaft.
  • the cup or bell-shaped adjustment can be made for example of plastic.
  • the actuating shaft penetrates the adjustment member centrally. This means that the longitudinal axis of the actuating shaft is connected to the central axis of the cup.
  • the housing of an electrical switch of the ignition device preferably serves as the housing of the ignition device.
  • the projection on the housing has a shape that differs from the circular shape of the open side of the adjustment, that is, from the lower edge of the adjustment.
  • the projection is a projection which extends in the radial direction from the actuating shaft.
  • the ignition device can be set from the blocking state into the ignition state by pure rotation of the actuating shaft and thus by turning the adjusting element.
  • a cutout is provided in the lower edge of the adjusting element over part of the circumference of the lower edge.
  • the cutout therefore preferably has at least one width that corresponds to the width of the projection on the housing.
  • the width of the cutout is greater than the width of the projection.
  • the width of the cutout is the angle range over which the cutout is provided in the lower edge of the setting element. Turning the adjustment member to a position where the cutout overlies the projection causes movement of the actuating shaft possible in the axial direction. This state is therefore also referred to as ignition state.
  • the height of the cutout may correspond to the height of the projection on the housing.
  • the height of the cutout can also be less than the height of the projection.
  • the choice of the height of the cutout is dependent on how the movement of the actuating axis in the axial direction leads to the actuation of the ignition device, that is, where the switching elements for switching the electrical switch or transmission elements for switching the electrical switch are arranged.
  • the lower edge of the adjustment member has a lower portion and a raised portion, which are connected via curved transitions miteinender.
  • the change of the state of the ignition device from a blocking state to a firing state can also take place when a compressive force is exerted on the actuating shaft.
  • This pressure force is applied by the user of the cooking appliance in which the gas valve is provided by pushing in a control element attached to the end of the actuating shaft. Due to the curved transition between the two areas, the user therefore does not have to release the operating element in order to move from one state to the other state.
  • the lower edge of the adjusting slides along the projection of the housing during rotation of the actuating shaft with applied pressure force.
  • the adjusting element has an active surface, which is in contact with an actuating element for actuating an electrical switch of the ignition device.
  • the active surface can be, in particular, the lower edge of the cup or the bell, that is to say the edge on the open side.
  • the inner surface of the adjusting element in the vicinity of the attachment to the actuating shaft is used as the effective surface.
  • This area of the adjusting element can in particular represent a base area running perpendicular to the longitudinal axis of the actuating shaft.
  • a receiving opening for carrying out the actuating shaft is provided in the adjusting element and the adjusting element is secured by the form of the receiving opening in a rotationally secure manner to the actuating shaft.
  • This embodiment has the advantage that further fasteners, such as clamps and cotter pins are not required to ensure the synchronous rotation of the actuating shaft and the adjusting element can.
  • the adjusting element has an active surface, which is in contact with an actuating element for actuating an electrical switch of the ignition device, wherein the actuating element is a transmission spring which lies between the adjusting element and an electrical switch of the ignition device.
  • the transmission spring is in this case preferably at one end on the inside of the cup-shaped adjusting element and at the other end to a switching element or actuating element of the electrical switch of the ignition device.
  • Another advantage of this embodiment is that the transmission spring is supported by the concern on the inside of the adjusting even with a pure rotation of the adjusting without pressure on the actuating shaft, the adjustment and prevents pivoting of the adjusting member relative to the longitudinal axis of the actuating shaft ,
  • FIG. 1 an embodiment of the gas valve according to the invention is shown.
  • the gas valve 1 has a main body 10, in which further components of the gas valve 1 can be accommodated.
  • a rotatable valve plug for adjusting the opening cross-section of the gas valve 1 and, in addition, a solenoid valve for securely closing the gas valve can be arranged in the main body.
  • gas is passed from the gas valve 1 to a burner, not shown.
  • a burner not shown
  • an electrical switch 31 is arranged on the upper side of the main body 10 of the gas valve 1.
  • the electrical switch 31 serves in particular as an ignition switch for the gas valve 1.
  • an ignition element not shown, is activated, by means of which a burner (not shown) connected to the gas valve 1 is ignited.
  • an actuating shaft 30 is guided, which projects beyond the electrical switch 31 upwards and extends into the main body 10 of the gas valve 1.
  • the cross section of the actuating shaft 30 deviates at least in the upper part of the circular cross section of the actuating shaft 30 over the further length thereof.
  • a flattening 301 is provided on the actuating shaft 30.
  • a shoulder 310 is provided, which protrudes upward above the top of the box-shaped electrical switch 31.
  • the paragraph 310 has an annular cross-section.
  • a radial projection 311 is also provided on the shoulder 310.
  • the adjusting element 32 has a cup shape or bell shape.
  • the base 321 of the cup points in the installed state of the adjusting element 32 upwards.
  • the open side of the cup faces the electrical switch 31.
  • a receiving opening 3210 for receiving or for the passage of the actuating shaft 30 is introduced in the base 321 .
  • the shape of the receiving opening 3210 corresponds to the shape of the cross section of the actuating shaft 30 in the upper region. This means that the receiving opening 3210 has a circular cross-section and a flattening 3211 is provided on one side. Due to the configuration of the actuating shaft 30 and the receiving opening 3210, the adjusting member 32 is held against rotation on the actuating shaft 30, that is, can not rotate relative to the actuating shaft 30 about the longitudinal axis 300 of the actuating shaft 30.
  • the actuating shaft 30 is mounted in the base body 10 of the gas valve 1, that it is rotatable about its longitudinal axis 300.
  • the actuating shaft 30 can be moved axially along its longitudinal axis 300, that is to be displaced.
  • a displacement of the actuating shaft 30 in the direction of the main body 10 of the gas valve 1 from a starting position by applying a pressure on the actuating shaft 30 against the spring force of an inner valve spring (not shown) in the base body 10 of the gas valve 1.
  • This movement is in Also referred to below as pushing in the actuating shaft 30. If the pressure force is taken from the actuating shaft 30, the actuating shaft 30 therefore shifts back to the starting position.
  • the adjusting element 32 has at its lower edge or lower edge 322, which faces the electrical switch 31, over a portion of the circumference of the adjusting element 32 a cutout 3220.
  • the lower edge 322 of the adjusting element 32 consists of a lower region 3221, an elevated region 3222 offset from the lower region 3221 and of transitions 3223 between these two regions.
  • the cutout 3220 and thus the raised area 3222 extend in the illustrated embodiment over less than half of the circumference of the adjusting element 32 at the lower edge 322.
  • the raised area 3222 may, for example, cover an angular range of 100 °.
  • the transitions 3223 between the lower Region 3221 and raised region 3222 have an S-curve shape. As a result, the transition 3223 is uniform.
  • the actuating shaft 30 is rotated with the adjusting member 32 attached thereto in such an angular position about the longitudinal axis 300 that the raised portion 3222 of the adjusting member 32 is above the projection 311 on the shoulder 310 of the housing of the electrical switch 31.
  • the raised area 3222 does not touch the projection 311 and in particular its upper side. Rather, there is a gap between the top of the projection 311 and the raised portion 3222 of the bottom edge 322. This distance defines the amount by which the actuating shaft 30 moves axially along its longitudinal axis 300, that is, can be pushed in.
  • an operating element (not shown) is usually provided at the upper end, via which the user of the cooking appliance, in which the gas valve 1 is provided, rotate the shaft about its longitudinal axis 300 and move it along the longitudinal axis 300, in particular can push in.
  • a transfer element in the form of a transmission spring 3103 is preferably provided (see FIG. 5 ).
  • This transmission spring 3103 is provided inside the adjustment member 32 around the operation shaft 30.
  • the structure of an embodiment of an electric switch 31 is shown in FIG FIG. 6 shown by way of example.
  • the switch 31 consists of an upper housing part 3100, a lower housing part 3101 and a between the upper housing part 3100 and the lower housing part 3101 movably arranged intermediate part 3102.
  • the intermediate part In this case, for example, can be mounted pivotably on the lower housing part 3101.
  • a contact plate 3105 is provided on a lateral web.
  • two contacts 3106 are inserted. These contacts 3106 are in the assembled state of the electrical switch 31 so that they can come into contact with the contact plate 3105 in a movement of the intermediate part 3102 in the direction of the lower housing part 3101 and so the switch 31 is actuated.
  • the intermediate part 3102 may be referred to as the switching element of the switch 31.
  • a passage 3107 is provided in each case.
  • the passages 3107 in the parts 3100, 3102, 3103 are inserted so that they are aligned in the assembled state of the switch 31 with each other.
  • the diameter of the passage 3107 in the intermediate part is smaller than the diameter of the passage 3107 in the housing upper part 3100.
  • the transmission spring 3103 which is fixed to the upper housing part 3100 in the illustrated embodiment, has on its underside a diameter which is also larger than the diameter of the passage 3107 in the intermediate part 3102. With a movement of the transmission spring 3103 in the direction of the movable Intermediate part 3102, the transmission spring 3103 thus exert forces on the intermediate part 3102 and move it in the electrical switch 31.
  • the intermediate part 3102 is resiliently mounted on the lower housing part 3101. In the illustrated embodiment, three support springs 3014 are provided in the vicinity of the passage 3107 in the housing lower part 3101 for this purpose.
  • the transmission spring 3103 abuts with its upper end to the base 321 of the adjusting member 32.
  • the transmission spring 3103 can thus transmit forces acting on the adjustment member 32 to the transmission spring 3103. From there, the forces are then transmitted to the intermediate part 3102 of the electric switch 31.
  • This power transmission causes the intermediate part 3102 to be moved in the direction of the lower housing part 3101.
  • the contact plate 3105 and the contacts 3106 come into contact with each other, and the electric switch 31 is operated.
  • the adjustment member 32 is attached to the actuating shaft 30, that this forces acting on the actuating shaft 30 in the direction of the longitudinal axis 300 of the actuating shaft 30 to the adjusting member 32 can transmit.
  • the adjusting element 32 is engaged in a circumferential groove on the actuating shaft 30 for this purpose.
  • the actuating shaft 30 can be displaced only by the amount in the direction of the main body 10 of the gas valve 1, that is to be pressed in, which corresponds to the distance between the raised portion 3222 of the lower edge of the adjusting element 32 and the top of the projection 311. If no more pressing force is exerted on the actuating shaft 30, that is, the user lets go of the control element, the actuating shaft 30 is pushed back into the initial state.
  • the blocking state is in FIG. 2 shown. In this state, the actuating shaft 30 and thus also the adjusting element 32 attached thereto are so compared to the ignition state FIG. 1 twisted so that the lower portion 3221 of the lower edge 322 of the adjusting member 32 rests on the top of the projection 311.
  • transitions 3223 between the raised area 3222 and the lower area 3221 of the adjusting element 32 having a curved shape, rotation of the actuating axis 30 about its longitudinal axis 300 can take place even when the pressure force exerted on the actuating shaft 30.
  • the lower edge 322 of the adjusting element 32 slides on the projection 311 from one of the regions 3221, 3222 via the transition 3223 into the respective other region 3222, 3221.
  • the actuation of the switch 31 and thus the ignition of the burner is only possible if the projection 311 is aligned with the raised portion 3222 of the adjusting element 32.
  • the actuating shaft 30th by the amount corresponding to the distance between the raised portion 3222 and the top of the projection 311, are axially displaced.
  • the transmission spring 3103 is compressed by the adjusting element 32, in particular by the base surface 321, and thus exerts an actuating force on the intermediate part 3102 of the switch 31. Due to the resulting contact of the contacts 3106 with the contact plate 3105, the switch 31 is actuated and passed a corresponding signal to the ignition element on the burner, which leads to the ignition of the burner.
  • the transmission spring 3103 therefore serves together with the adjusting element as an actuating element for the switch 31st
  • the pressure force applied to the actuating shaft 30 is introduced via the lower region 3221 of the adjusting element 32 into the upper housing part 3100 of the switch 31.
  • the upper housing part 3100 is fixedly connected to the lower housing part 3101. Also, no force is transmitted to the transmission spring 3103 in the locked state. The force introduced into the actuating shaft 30 thus does not lead to a movement of the intermediate part 3102 and thus also not to an actuation of the switch 31.
  • the cutout 3220 on the adjusting element 32 is positioned at the circumference thereof so that, when the adjusting element 32 is attached to the actuating shaft 30 in a rotationally secure manner, the raised area 3222 overlies the projection 311 when the angular position of the actuating shaft 30 has a large to maximum opening cross section of the gas valve 1 sets.
  • the lower region 3221 lies above the projection 311 when the angular position of the actuating shaft 30 defines a medium to small opening cross section of the gas valve 1.
  • the switch may have a different structure.
  • the switch may be provided over in the upper side of the housing of the electrical switch in the region of the circumference of the adjustment of one or more switching elements which protrude upwards.
  • the activation of the electrical switch is effected by the contact of the lower portion of the lower edge of the adjusting element with the switching element.

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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)
EP11162450A 2010-04-28 2011-04-14 Vanne de gaz dotée d'un dispositif d'allumage Withdrawn EP2383520A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11162450A EP2383520A3 (fr) 2010-04-28 2011-04-14 Vanne de gaz dotée d'un dispositif d'allumage

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10382097 2010-04-28
ES201030741 2010-05-19
EP11162450A EP2383520A3 (fr) 2010-04-28 2011-04-14 Vanne de gaz dotée d'un dispositif d'allumage

Publications (2)

Publication Number Publication Date
EP2383520A2 true EP2383520A2 (fr) 2011-11-02
EP2383520A3 EP2383520A3 (fr) 2013-01-09

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ID=44475113

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EP11162450A Withdrawn EP2383520A3 (fr) 2010-04-28 2011-04-14 Vanne de gaz dotée d'un dispositif d'allumage

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019129405A1 (fr) 2017-12-25 2019-07-04 Arcelik Anonim Sirketi Plaque de cuisson comprenant une rondelle d'allumage
US10495316B2 (en) * 2015-11-16 2019-12-03 Channel Products, Inc. Gas appliance ignition module

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1500881A2 (fr) 2003-07-25 2005-01-26 ITW Industrial Components S.r.l. Dispositif intégré pour plaque de cuisson comprenant un robinet de gaz et un dispositif d'allumage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20070306A1 (it) * 2007-05-04 2008-11-05 Itw Ind Components S R L Co N Dispositivo di comando includente un rubinetto gas ed un elemento di catenaria per bruciatori di un piano di cottura
ITTO20070638A1 (it) * 2007-09-11 2009-03-12 Itw Ind Components S R L Co N Dispositivo di comando rotante includente un rubinetto gas ed un elemento di catenaria per bruciatori di un piano di cottura

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1500881A2 (fr) 2003-07-25 2005-01-26 ITW Industrial Components S.r.l. Dispositif intégré pour plaque de cuisson comprenant un robinet de gaz et un dispositif d'allumage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10495316B2 (en) * 2015-11-16 2019-12-03 Channel Products, Inc. Gas appliance ignition module
WO2019129405A1 (fr) 2017-12-25 2019-07-04 Arcelik Anonim Sirketi Plaque de cuisson comprenant une rondelle d'allumage

Also Published As

Publication number Publication date
EP2383520A3 (fr) 2013-01-09

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