EP2390574A2 - 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
EP2390574A2
EP2390574A2 EP11166643A EP11166643A EP2390574A2 EP 2390574 A2 EP2390574 A2 EP 2390574A2 EP 11166643 A EP11166643 A EP 11166643A EP 11166643 A EP11166643 A EP 11166643A EP 2390574 A2 EP2390574 A2 EP 2390574A2
Authority
EP
European Patent Office
Prior art keywords
gas valve
actuating
guide structure
actuating shaft
ignition device
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Withdrawn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
EP11166643A
Other languages
German (de)
English (en)
Other versions
EP2390574A3 (fr
Inventor
Paulo Marcos Andrade Soares
Melca Gutierrez Humara
Emilio Placer Maruri
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
Priority claimed from ES201030828A external-priority patent/ES2394700A2/es
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to EP11166643A priority Critical patent/EP2390574A3/fr
Publication of EP2390574A2 publication Critical patent/EP2390574A2/fr
Publication of EP2390574A3 publication Critical patent/EP2390574A3/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Withdrawn legal-status Critical Current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
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges

Definitions

  • 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 a guide structure which permits actuation of the ignition device, in particular of an electrical switch, only in a defined rotational angle range of the actuating shaft.
  • 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 guide structure consisting of at least a first circular part provided fixedly to a housing of the ignition device and a second part fixed to the actuating shaft, and passing through the two parts of Guide structure can be set a blocking state in which the axial movement 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 the direct or indirect operation of the electrical switch along the longitudinal axis of the actuating shaft.
  • a guide structure according to the invention a two-part structure is referred to, which constitutes a part of 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.
  • a blocking state Preferably, in the locked state, no axial movement of the actuating shaft is possible. However, a slight axial movement of the actuating shaft, for example, by a certain elasticity of the parts of the guide structure even in the locked state. However, this movement of the actuating shaft is then so small that the movement is not sufficient to actuate the ignition device. To prevent the axial displacement of the actuator is thus understood to prevent the axial displacement by an amount which is required for the actuation of the ignition device.
  • the desired states which the ignition device is to assume can be defined over the entire range of rotation or angular range of the actuating shaft, in particular 360 °.
  • the first circular part is preferably so to the Actuating shaft arranged to pass through the center of the circular part.
  • the first, circular part is arranged coaxially with the actuating shaft.
  • the first part of the guide structure provided on the housing of the electric switch is in the immediate vicinity of the switch so that prevention of the axial movement of the operation shaft is reliably prevented there can.
  • a relative alignment of the first part of the guide structure with the electrical switch is also not required during assembly of the gas valve according to the invention, since the first part of the guide structure is already provided on the switch housing.
  • 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 guide structure 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 ensures that sufficient gas is available for ignition by the electric spark on the burner. In the case of gas volume flows of lesser quantity, however, the guiding structure 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 inventively produced by the relative position of the parts of the guide structure to each other.
  • the parts of the guide structure are in a blocking position relative to one another.
  • the ignition state however, the parts of the guide structure are mutually in a position which is also referred to as the ignition position.
  • the second part of the guide structure is partially against the first part of the guide structure. Because the second part of the
  • Guide structure is attached to the actuating shaft, in the locked state by the second part of the guide structure, a movement of the actuating shaft in the direction of the housing on which the first part of the guide structure is provided, not possible.
  • a movement of the actuating shaft in the direction of the housing, in particular in the direction of the housing of the electrical switch, is hereinafter also referred to as pressing in of the actuating shaft.
  • the lock state and the ignition state can be easily adjusted depending on the angular position of the operation shaft. Since the rotational angle position of the actuating shaft, which is also referred to below as the angular position determines the opening cross-section of the gas valve and thus defines the gas flow rate, which is passed to the burner, the ignition state can be limited to large gas flow rates. Furthermore, the attachment of the second part of the guide structure 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. Finally, by attaching the second part of the guide structure to the actuating shaft, which is axially movable, also an actuation of the ignition device can be made possible directly or indirectly by the second part of the guide structure, which will be explained in more detail later.
  • the first part preferably represents a guide wall, which is provided on the upper side of a housing of the ignition device and in the upper edge of a recess is provided.
  • a guide wall as the first part of the guide structure, a space is defined in the first part of the guide structure in which further components of the gas valve can be accommodated or guided through this space.
  • a shoulder of the housing which is circular in some switches, are received in the guide wall and fix it at the same time.
  • the angle range is defined in which the ignition device is in the ignition state, that is, in which the actuating shaft can be moved axially to directly or indirectly actuate the electrical switch of the ignition device.
  • the angular range over which the depression extends in the upper edge of the guide wall is, for example, 90 to 100 °.
  • the recess is preferably curved.
  • the change of state can also take place when a pressure 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 curve shape of the recess, the user does not have to release the operating element in order to move from one state to the other state.
  • the dimension of the second part in the radial direction is larger in regions than the inner radius of the first circular part of the guide structure.
  • the radial direction is understood to be the direction in which the radius of the actuating shaft lies.
  • a receiving opening for carrying out the actuating shaft is provided in the second part of the guide structure and the second part is secured by the shape of the receiving opening in a rotationally secure manner to the actuating shaft.
  • This embodiment has the advantage that further fastening elements, such as clamps and cotter pins are not required in order to ensure the synchronous rotation of the actuating shaft and the second part of the guide structure can.
  • the second part of the guide structure comprises a guide arm which extends in the radial direction from the actuating shaft.
  • the guide arm in this case preferably has the largest dimension of the second part in the radial direction.
  • the guide arm thus serves for the contact of the first Part of the management structure with the second part of the management structure.
  • a guide arm is a component understood that has a small width. As a result, only a small angular range around the actuating shaft is covered by the guide arm and the ignition state in which the guide arm enters a recess on the first part of the guide structure can be limited to a small angular range.
  • the side surfaces of the guide arm are preferably arranged inclined to each other.
  • the side surfaces are inclined to each other so that the underside of the guide arm has a smaller width than the top.
  • the recess preferably has a curved shape.
  • the side surfaces are inclined to each other, that in a position in which the guide arm rests on the transition to the lowest point of the recess on the guide wall, this slides along the transition and easier to can reach the deepest point of the depression.
  • the second part of the guide structure preferably comprises an actuating disk for actuating an electrical switch of the ignition device.
  • the actuating disk is mounted on the actuating shaft.
  • an actuating element is referred to as actuating disk which extends at least over part of the circumference of the actuating shaft in the radial direction from the actuating shaft.
  • a transmission element is preferably subjected to a force such that it exerts sufficient force on the electrical switch in order to actuate it.
  • the guide arm of the second part of the guide structure is preferably designed in one piece with the actuating disk.
  • the guide arm preferably extends from the edge of the actuating disk.
  • a transmission spring in the form of a helical spring is arranged in the first, circular part of the guide structure.
  • the transmission spring serves to transmit an actuating force from the actuating shaft to the electrical switch.
  • the transmission spring is acted upon by the actuating disk during the axial movement of the actuating shaft with force.
  • a receiving area for a transmission element for actuating an electrical switch of the ignition device is provided in the underside of the second part of the guide structure.
  • the position of the transmission element for example in the form of a transmission spring, can be further fixed.
  • slippage of the transmission element with respect to the second part of the guide structure can be prevented by the receiving region.
  • the receiving area can be created on the second part of the guide structure, which represents an actuating disk, for example by a flange directed downwards at the edge of the disk.
  • the second part of the guide structure is fastened via a latching connection in a groove in the actuating shaft.
  • latching lugs and / or latching arms are provided for the latching connection to the second part of the guide structure.
  • the second part of the guide structure on the actuating shaft is provided so that it is fixed in a rotationally secure manner on the actuating shaft via the shape of the actuating shaft and a corresponding shape of a receiving opening in the second part of the guide structure.
  • 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 additionally a solenoid valve for safe complete closing of the gas valve 1 may be arranged.
  • 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.
  • Paragraph 312 provided, which protrudes upward over the top of the box-shaped electrical switch 31.
  • the shoulder 312 has an annular cross-section.
  • a circular or annular guide wall 321 is provided, which forms the first part of a guide structure 32.
  • a second part 322 of the guide structure 32 is above the electrical switch 31 at a vertical distance to the shoulder 312 attached.
  • the second part 322 of the guide structure comprises, in the illustrated embodiment, an actuation disk 3220 extending radially from the actuation shaft 30.
  • a guide arm 3221 is provided at one location, which extends in the radial direction from the outer edge of the actuating disk 3220 to the outside.
  • the guide arm 3221 has an isosceles trapezoidal cross section.
  • the side surfaces of the guide arm 3221 are inclined to each other so that the width of the guide arm 3221 is lower at the bottom than at the top thereof.
  • a downwardly directed flange 3223 is provided (see FIGS. 3 and 5 ).
  • a receiving region is defined on the underside of the actuating disk 3220, in which a transmission element, in particular a transmission spring 311, can be held.
  • a receiving opening 3222 for receiving or for the passage of the actuating shaft 30 is introduced into the actuating disk 3220.
  • the shape of the receiving opening 3222 corresponds to the shape of the cross section of the actuating shaft 30 in the upper region. This means that the receiving opening 3222 has a circular cross-section and a flattening is provided on one side. Due to this configuration of the actuating shaft 30 and the receiving opening 3222, the second part 322 of the guide structure 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 second part 322 of the guide structure 32 is fixed to the actuating shaft 30, that these forces acting in the direction of the longitudinal axis 300 of the actuating shaft 30 to the actuating shaft 30, can transmit.
  • a circumferential groove 302 is provided on the actuating shaft 30 for this purpose.
  • latching arms 3224 are provided, each having a detent. The locking lugs point inwards, so that the actuating disk 3220 can engage in the groove 302 via the latching arms 3224.
  • the latching arms 3224 extend downwardly from the actuating disk 3220 at the receiving opening 3222.
  • Slots 3225 are provided between the latching arms 3224, which allow a movement of the latching arms 3224, in particular a pressing apart of the Rastarem 3224 during insertion of the actuating shaft 30.
  • three latching arms 3224 are provided, which are provided in the region of the receiving opening 3222 in which this has a circular cross-section. In the region of the flattening in the receiving opening no locking arm is provided. In the FIG. 3 is the transfer spring 311 not shown for better visibility of the individual components.
  • 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 guide wall 321 has in its upper edge or upper edge, which faces away from the electrical switch 31, over a part of the circumference of the guide wall 321 has a recess 3210.
  • the height of the guide wall in the region of the recess 3210 is equal to or greater than the height of the shoulder 312 on the housing.
  • the upper edge of the guide wall 321 has an upper portion, a lower point offset from the upper portion, which is the lowest point of the recess 3210, and transitions 3211 between the upper portion and the deepest portion of the recess 3210 ,
  • the recess 3210 extends in the illustrated embodiment over less than half of the circumference of the guide wall 321.
  • the recess 3210 may for example cover an angular range of 100 °.
  • the transitions 3211 have an S-curve shape. hereby the transition 3211 is even.
  • FIG. 5 results in a recess 3212 is provided in the bottom of the guide wall 321. This serves to fix the guide wall 321 with respect to a rotational movement.
  • the guide wall 321 is for this purpose applied to the housing of the electrical switch 31 so that a projection (not shown) is received on the annular shoulder 312 of the housing of the electrical switch 31 in the recess 3212. Horizontal movement of the guide wall 321 is thus prevented by the shoulder 312 and the rotational movement through the recess 3212 and the projection on the shoulder 312.
  • the actuating shaft 30 with the second part 322 of the guide structure 32 attached thereto is rotated in such an angular position about the longitudinal axis 300 that the guide arm 3221 is aligned with the recess 3210, in particular with the lowest point of the recess 3210.
  • the underside of the guide arm 3221 does not touch the upper edge of the guide wall 321. Rather, between the underside of the guide arm 3221 and the upper edge of the guide wall 321 is a vertical distance. 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 actuating 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 311 is preferably provided (see FIGS. 1 and 2 ).
  • This transmission spring 311 is inside the guide wall 321 and in particular in Inside the shoulder 312 may be provided around the actuating shaft 30 around.
  • the transmission spring 311 abuts with its lower end on a movable part (not shown) in the electric switch 31. At the upper end, the transmission spring 311 abuts the underside of the actuating disk 3220 or is only slightly spaced from the underside of the actuating disk 3220.
  • the actuating shaft 30 can be displaced only by the amount in the direction of the base body 10 of the gas valve 1, that is to be pressed in, which corresponds to the distance between the underside of the guide arm 3221 and the upper edge of the guide wall 321 in the region of the recess 3210. 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. 1 shown. In this state, the actuating shaft 30 and thus also the attached second part 322 of the guide structure 32 so after the ignition state FIG. 2 twisted that already in the initial state, the underside of the guide arm 3221 rests on the upper edge of the guide wall 321.
  • transitions 3211 between the upper region and the lowest point of the recess 3210 on the guide wall 321 are curved, even with a force exerted on the actuating shaft 30 compressive force rotation of the actuating shaft 30 about its longitudinal axis 300.
  • the bottom of the Guide arm 3221 slides along on the upper edge of the guide wall 321.
  • the actuation of the switch 31 and thus the ignition on the burner is preferably only possible if the guide arm 3221 is aligned with the lowest point of the recess 3210.
  • the actuating shaft 30 can be axially displaced by the amount corresponding to the distance between the guide arm 3221 and the lowest point of the recess 3210.
  • the transmission spring 311 is compressed by the second part 322 of the guide structure 32, in particular by the actuating disk 3220, and thus exerts an actuating force on a switching element of the switch 31.
  • 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 311 therefore serves together with the actuating disk 3220 as an actuating element for the switch 31st
  • a switch 31 may be used in which a lower actuation force is required or has a low switching path. With such a switch 31, an actuation of the switch can already occur when the guide arm 3221 is aligned with one of the transitions 3211 of the guide wall 321.
  • the recess 3210 on the guide wall 321 is positioned at the periphery thereof so that, when the second part 322 of the guide structure 32 is rotatably mounted on the actuating shaft 30, the guide arm 3221 is above the recess 3210 when the angular position of the actuating shaft 30 has a large to maximum opening cross section of the gas valve 1 determines.
  • the angular position of the operating shaft 30 defines a middle to small opening area of the gas valve 1
  • the lower surface of the guide arm 3221 rests on the upper edge of the guide wall 321 in the area not covered by the recess 3210.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Feeding And Controlling Fuel (AREA)
EP11166643A 2010-05-24 2011-05-19 Vanne de gaz dotée d'un dispositif d'allumage Withdrawn EP2390574A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11166643A EP2390574A3 (fr) 2010-05-24 2011-05-19 Vanne de gaz dotée d'un dispositif d'allumage

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10382138 2010-05-24
ES201030828A ES2394700A2 (es) 2010-05-24 2010-05-31 Vavula de gas con dispositivo de encendido
EP11166643A EP2390574A3 (fr) 2010-05-24 2011-05-19 Vanne de gaz dotée d'un dispositif d'allumage

Publications (2)

Publication Number Publication Date
EP2390574A2 true EP2390574A2 (fr) 2011-11-30
EP2390574A3 EP2390574A3 (fr) 2013-01-16

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Application Number Title Priority Date Filing Date
EP11166643A Withdrawn EP2390574A3 (fr) 2010-05-24 2011-05-19 Vanne de gaz dotée d'un dispositif d'allumage

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EP (1) EP2390574A3 (fr)

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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1907756B1 (fr) * 2005-07-25 2012-03-28 Arçelik Anonim Sirketi Appareil de cuisson
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

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