EP2390575B1 - Gas valve with an actuating device for an electric switch - Google Patents
Gas valve with an actuating device for an electric switch Download PDFInfo
- Publication number
- EP2390575B1 EP2390575B1 EP11166644.2A EP11166644A EP2390575B1 EP 2390575 B1 EP2390575 B1 EP 2390575B1 EP 11166644 A EP11166644 A EP 11166644A EP 2390575 B1 EP2390575 B1 EP 2390575B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuating
- gas valve
- actuating shaft
- shaft
- switch
- 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.)
- Not-in-force
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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
- the invention relates to a gas valve with an actuating shaft which is rotatable about an axis for adjusting an opening cross-section of the gas valve and which is displaceable for actuating an electrical switch in the axial direction, wherein an actuating element is provided for the electrical switch, depending on the axial position the actuating shaft acts on a switching element of the electrical switch.
- 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.
- WO 2009/034445 A2 describes a rotary control device with a gas tap for a burner of a cooker.
- the control device in this case comprises a gas cock with a rotatable control shaft.
- an annular disc On the control shaft, an annular disc is mounted, which has a recess or a projection on the underside. The disc is connected to the control shaft so that it is locked in the axial direction. A rotation of the control shaft will converted by the disc and the recess in a translational movement of a control rod of a microswitch.
- WO 2008/135839 A2 a control device for a burner of a gas range.
- a control rod of a microswitch of the ignition device is actuated by an axial movement of the control shaft of the gas valve, wherein the actual actuation takes place via a ring which is fastened to the control shaft. Over the entire angular range of the bottom of the ring can thus be carried out an actuation of the ignition device.
- the ignition can not be limited in a simple and reliable manner to defined operating conditions of the gas valve.
- the EP 0 492 057 A1 discloses a gas tap with a tap housing and a rotatable in the housing via control cams on the free end of a handle shaft cock plug, wherein the handle shaft is displaceable against the force of a spring in its axial direction to take certain switching positions. In the area of the switching cam of the grip shaft provided with a control surfaces disc-shaped multi-functional part is provided.
- the EP 0 492 057 A1 discloses all the features of the preamble of claim 1. It is also a disadvantage of this gas cock that the ignition can not be done in a simple and secure manner.
- 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 in which the actuating element and the switching element of the electrical switch can only come into contact with one another in a defined angular range of the actuating shaft.
- a gas valve with an actuating shaft which is rotatable about an axis for adjusting an opening cross-section of the gas valve and which is displaceable for actuating an electrical switch in the axial direction, wherein an actuating element is provided for the electrical switch, in Dependence on the axial position the actuating shaft acts on a switching element of the electrical switch.
- the actuating element has a shape which deviates at least at the outer edge of a rotationally symmetrical shape, and the actuating element has an actuating projection which extends in the radial direction to the outside.
- the gas valve is characterized in that the actuating projection on the underside has two active surfaces for selectively acting on the switching element of the electric switch, which are inclined to the longitudinal axis of the actuating shaft, lie on the underside of the actuating projection and together form a V-shape.
- a rotationally symmetric shape in this case a shape is referred to, which is rotationally symmetrical with respect to the longitudinal axis of the actuating shaft.
- the electrical switch of the gas valve is part of an ignition device.
- the ignition device is understood to be 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.
- the switching element of the electrical switch is preferably adjacent to the actuating shaft and has a small width.
- the switching element has a contact surface which does not completely surround the actuating shaft. Rather, the switching element is designed and arranged so that it engages only in a part of the angular range around the actuating shaft.
- the actuator is mounted according to the invention on the actuating shaft.
- the actuating element additionally has a shape which deviates from a rotationally symmetrical shape at least on the outer edge of the actuating element.
- the angular range of the actuating shaft that is the angular or rotational positions of the actuating shaft in which actuation of the electrical switch can be limited
- This angular range is also referred to below as the ignition range designated.
- the operation of the ignition device can be limited to situations in which the conditions in the gas valve provide sufficient safety.
- the ignition range is selected so that in this Range of gas flow in the gas valve is set to the burner to a maximum value. This ensures that sufficient gas is available for ignition by the electric spark on the burner.
- the actuating element In the case of gas volume flows of lesser quantity, that is to say in other angular ranges of the actuating shaft, the actuating element can not come into contact with the switching element and an actuation of the electrical switch and thus actuation or activation of the ignition device is thus prevented.
- the danger to the user is minimized.
- the operation of the electric switch detects the user by the sound of the ignition of the ignition element to the burner or by a haptic feedback, which is felt in the operation of the electric switch on the actuating shaft. If the user detects that no actuation of the electrical switch takes place, this will turn the actuating shaft until the ignition takes place. 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 actuating element has an actuating projection which extends in the radial direction to the outside.
- the radial direction is understood to be the direction in which the radius of the actuating shaft lies.
- the actuating projection preferably covers only a small portion of the circumference of the actuating shaft. Particularly preferably, the projection covers a range of less than 90 °. As a result, the ignition range is minimized.
- the ignition region would extend over the entire circumference of the disk except for the recess or slot, and the advantages attainable according to the present invention can therefore be achieved not or not sufficiently achieved.
- the actuating element comprises a fastening element, preferably in the form of a fastening washer, for attachment to the actuating shaft.
- the fastener may also have a different shape.
- a fastening washer serves as a fastener, a sleeve which is attached to the actuating shaft and at the periphery of an actuating projection is provided.
- the use of a fastening washer as a fastening element has the advantage that the switching element is not in must be provided in the immediate vicinity of the circumference of the actuating shaft.
- the length of a radial actuating projection can be minimized or the actuating projection can be supported by the fastening disk by means of a fastening disk. By such a support, the transmission of a pressing force introduced into the operation shaft is reliably ensured by the operation projection on the switching element.
- the radial actuating projection is arranged on the outer edge of the fastening disc.
- the length of the actuating projection can be selected to be small, and thus bending of the actuating projection during the actuation of the switching element can be prevented.
- the actuating projection has on its underside two active surfaces for selectively acting on the switching element of the electrical switch, which are inclined to the longitudinal axis of the actuating shaft, lie on the underside of the actuating projection and together form a V-shape.
- the active surface is preferably at an angle to the longitudinal axis of the actuating shaft, which is in a range of 1 ° to 85 °, more preferably in the range of 30 ° to 60 °.
- the side of the actuating projection is referred to, which is visible in a bottom view of the actuating projection.
- the active surface is arranged so that its lower edge represents the lower edge of the actuating projection.
- the active surface may thus according to the present invention also constitute a side surface or a part of a side surface of the actuating projection.
- the active surface is inclined relative to the longitudinal axis of the actuating shaft, that the extension of the radius of the actuating shaft is parallel to the active surface.
- the actuation of the electrical switch can be done in two ways. Firstly, the actuating shaft can first be rotated in an angular position in which the actuating projection vertically with the Switching element is aligned. If in this state, the actuating shaft is moved in the direction of the gas valve, that is pressed in, the switching element is actuated by the actuating projection, in particular the lower edge of the actuating projection, and thus causes the activation of the ignition element and thus the ignition of the gas burner.
- the actuation of the switch can also take place in such a way that the actuating shaft is first pressed in at an angular position in which the actuating projection is not aligned vertically with the switching element and only subsequently turned into the ignition region.
- the active surface gets in contact with the switching element and the switching element slides on further rotation of the actuating shaft along the active surface along until it has reached the lower edge of the active surface and thus the lower edge of the actuating projection. Due to the inclination of the active surface, thereby the switching element is moved or pivoted in the direction of the switch. At the latest in this position, the electrical switch is actuated and the ignition takes place at the gas burner.
- the switching path of the switching element can be set so that it corresponds to the vertical height of the active surface. In this case, the operation of the switch takes place only in the angular position in which the switching element is in contact with the lower edge of the actuating projection. Alternatively, it is also possible to choose the switching path of the switching element lower. In that case, the switching of the switch can already take place in an angular position of the actuating shaft, in which the upper side of the switching element is in contact with it at a position of the active surface which is higher than the lower edge of the active surface. As a result, the ignition range is increased.
- the actuating projection on two active surfaces for selectively acting on the switching element of the electrical switch which lie on the underside of the actuating projection and together form a V-shape.
- the two active surfaces can abut each other at their lower edge.
- a horizontal connection surface can also be provided between the lower edges of the active surfaces. This connection surface then also serves as an effective surface for acting on the switching element of the switch.
- the switching element is in the form of a switching arm which extends beyond the housing of the switch.
- a switching arm a longitudinally extending switching element is referred to, which leads by force application in the longitudinal direction for actuating the switch.
- the switching arm can hereby be moved axially or pivoted.
- the actuating element has a receiving opening for the actuating shaft and the receiving opening and the actuating shaft have at least partially a shape which deviates from a rotationally symmetrical shape.
- the actuating shaft can be inserted into the actuating element. Since the shape of the receiving opening and of the actuating shaft deviate from a rotationally symmetrical shape at least in the region in which they are fastened to one another, these two components are secured against rotation to one another.
- the shape of the receiving opening corresponds to the shape of the actuating shaft in the mounting area.
- a flattening may be provided on the actuating shaft, which has a circular cross-section. A corresponding flattening is then also provided at the circular receiving opening.
- the actuating element is preferably fastened to the actuating shaft via a groove in the actuating shaft.
- the groove may be provided circumferentially on the actuating shaft.
- an idle state of the gas valve preferably the lower edge of the actuating projection and the upper edge of the switching element of the electrical switch are spaced apart in the axial direction.
- the state of the gas valve is referred to as idle state in which no forces, in particular no pressure forces, are exerted by the user on the actuating shaft from the outside.
- This idle state is present, for example, during operation of the gas burner after ignition.
- FIG. 1 an embodiment of the gas valve 1 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.
- 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.
- a switching arm 311 Over the top of the housing of the electrical switch 31 projects in the illustrated embodiment, a switching arm 311 upwards.
- an actuating shaft 30 is further 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.
- an actuating element 32 is mounted above the electrical switch 31 at a distance from the top of the electrical switch 31.
- the actuator 32 includes in the illustrated embodiment, a mounting washer 320 which extends radially from the actuating shaft 30 from. At the outer edge of the mounting washer 320 is in one place Actuating projection 321 is provided, which extends in the radial direction from the outer edge of the mounting plate 320 to the outside.
- the operating projection 321 is mounted in the illustrated embodiment on a flange of the fixing disk 320, which projects downwardly on the outer circumference of the fixing disk 320.
- a receiving opening 3202 for receiving or for the passage of the actuating shaft 30 is introduced.
- the shape of the receiving opening 3202 corresponds to the shape of the cross section of the actuating shaft 30 in the upper region. This means that the receiving opening 3202 has a circular cross-section and a flattening 3203 is provided on one side. Due to the configuration of the actuating shaft 30 and the receiving opening 3202, the actuating element 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 actuator 32 is attached to the actuating shaft 30, that these forces acting on the actuating shaft 30 in the direction of the longitudinal axis 300 of the actuating shaft 30 can transmit.
- the fixing disc 320 rests on its underside on the shoulder in the actuating shaft 30, by means of which the flattening 301 is formed.
- a circumferential groove 302 is provided on the actuating shaft 30.
- locking arms 3201 are provided which extend parallel to the longitudinal axis of the actuating shaft 30 and each having a latching nose 3205.
- the latching noses 3205 point inward, so that the fastening disk 320 can engage in the groove 302 via the latching arms 3201.
- the latching arms 3201 extend downwardly from the mounting washer 320 at the receiving opening 3202. Slots 3204 are provided between the latching arms 3201, which allow a movement of the latching arms 3201, in particular a pressing apart of the latching arms 3201 during insertion of the actuating shaft 30.
- three latching arms 3201 are provided, which are provided in the region of the receiving opening 3202 in which this has a circular cross-section. In the region of the flattening 3203 in the receiving opening 3202 no locking arm is provided.
- 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 rest state or a rest 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 also referred to as pushing in the actuating shaft 30. If the pressure force is taken by the actuating shaft 30, the actuating shaft 30 therefore shifts back into the rest position.
- the operating projection 321 which in the FIGS. 5 to 7 is shown in more detail, has on its underside two active surfaces 3211 and 3212.
- the active surfaces 3211 and 3212 are aligned with each other so that they together form a V-shape.
- the lower edges of the two active surfaces 3211 and 3212 lie on the lower edge of the actuating projection and are connected to each other via a narrow horizontal connecting surface.
- the active surfaces 3211, 3212 form only the lower portion of the actuating projection 321. Above the active surfaces 3211, 3212 these go over in likewise inclined side surfaces.
- the inclination of the side surfaces relative to the longitudinal axis 300 of the actuating shaft 30, however, is less than the inclination of the active surfaces 3211, 3212 relative to the longitudinal axis 300.
- FIG. 1 and the sectional views of FIGS. 3 and 4 the gas valve is in the idle state.
- the operating shaft 30 is not pressed into the main body 10 of the gas valve 1.
- the lower edge of the operating projection 321 is at a vertical distance to the upper edge of the switching arm 311.
- the actuating shaft 30 can be rotated by the entire angular range of 360 °, without causing the switch 31 to operate. If the actuating shaft 30 from the idle state in the angular position, in FIG.
- the upper edge of the switching arm 311 slides along the active surface 3212 until it has reached the lower edge of the active surface 3212, which also simultaneously represents the lower edge of the actuating projection 321. Since the operating projection 321 is fixedly secured to the operating shaft 30 via the fixing disk 320, the switching arm 311 is thus pushed down or pivoted and actuates the switch 31. As a result, the gas flowing out of the burner is ignited. If the pressure force on the actuating shaft 30, which has led to the pushing away removed, the actuating shaft 30 moves back up and the lower edge of the actuating projection 321 is at a distance to the upper edge of the switching arm 311st
- the active surfaces may also have an angle other than the angle to the longitudinal axis of the actuating shaft.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanically-Actuated Valves (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
- Taps Or Cocks (AREA)
Description
Die Erfindung betrifft ein Gasventil mit einer Betätigungswelle, die zum Einstellen eines Öffnungsquerschnitts des Gasventils um eine Längsachse drehbar ist und die zum Betätigen eines elektrischen Schalters in axialer Richtung verschiebbar ist, wobei ein Betätigungselement für den elektrischen Schalter vorgesehen ist, das in Abhängigkeit der axialen Position der Betätigungswelle auf ein Schaltelement des elektrischen Schalters wirkt.The invention relates to a gas valve with an actuating shaft which is rotatable about an axis for adjusting an opening cross-section of the gas valve and which is displaceable for actuating an electrical switch in the axial direction, wherein an actuating element is provided for the electrical switch, depending on the axial position the actuating shaft acts on a switching element of the electrical switch.
Gasventile werden insbesondere in gasbeheizten Gargeräten, wie beispielsweise Kochmulden, Gasbacköfen oder Gasstandherden eingesetzt. Mit dem Gasventil wird der zu einem oder mehreren Gasbrennern des Gargerätes strömende Gasvolumenstrom zwischen Null und einem Maximalwert eingestellt. Dies erfolgt durch Drehen einer Betätigungswelle des Gasventils, die auch als Hahnwelle bezeichnet wird, um ihre Längsachse. Das Gasventil umfasst weiter einen elektrischen Schalter, der durch Drücken der Betätigungswelle in axialer Richtung betätigbar ist. Der elektrische Schalter ist Bestandteil einer Zündvorrichtung zum Entzünden des am Gasbrenner austretenden Gasstroms. Immer dann, wenn ein Benutzer die Betätigungswelle des Gasventils drückt, erzeugt die Zündvorrichtung im Bereich des Gasbrenners elektrische Funken. Ein solches Gasventil ist beispielsweise in der
Ein Nachteil dieser Arten von gasbeheizten Gargeräten besteht darin, dass die Zündung in jeder Winkelposition der Betätigungswelle erfolgen kann. Da durch die Winkelposition der Betätigungswelle gleichzeitig aber auch der Gasvolumenstrom eingestellt wird, bedeutet dies, dass auch bei geringen Gasvolumenströmen der elektrische Schalter betätigt wird. Eine Zündung kann aber aufgrund des geringen Gasvolumenstroms nicht zuverlässig gewährleistet werden, so dass es zu einem Austritt von unverbranntem Gas aus dem Gasbrenner kommen kann.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.
Weiterhin offenbart
Die
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde eine Zündvorrichtung für ein Gasventil mit einem Betätigungselement zu schaffen, bei dem die Zündvorrichtung nur bei definierten Betriebsbedingungen des Gasventils betätigt werden kann.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.
Der Erfindung liegt die Erkenntnis zugrunde, dass diese Aufgabe gelöst werden kann, indem ein Zündsystem verwendet wird, bei der das Betätigungselement und das Schaltelement des elektrischen Schalters nur in einem definierten Winkelbereich der Betätigungswelle miteinander in Kontakt treten können.The invention is based on the finding that this object can be achieved by using an ignition system in which the actuating element and the switching element of the electrical switch can only come into contact with one another in a defined angular range of the actuating shaft.
Die Aufgabe wird daher erfindungsgemäß gelöst durch ein Gasventil mit einer Betätigungswelle, die zum Einstellen eines Öffnungsquerschnitts des Gasventils um eine Längsachse drehbar ist und die zum Betätigen eines elektrischen Schalters in axialer Richtung verschiebbar ist, wobei ein Betätigungselement für den elektrischen Schalter vorgesehen ist, das in Abhängigkeit von der axialen Position der Betätigungswelle auf ein Schaltelement des elektrischen Schalters einwirkt. Wobei bei dem Gasventil das Betätigungselement eine Form aufweist, die zumindest am äußeren Rand von einer rotationssymmetrischen Form abweicht, und das Betätigungselement einen Betätigungsvorsprung aufweist, der sich in radialer Richtung nach außen erstreckt. Das Gasventil ist dadurch gekennzeichnet, dass der Betätigungsvorsprung an der Unterseite zwei Wirkflächen zum wahlweise Einwirken auf das Schaltelement des elektrischen Schalters aufweist, die zu der Längsachse der Betätigungswelle geneigt liegen, an der Unterseite des Betätigungsvorsprungs liegen und zusammen eine V-Form bilden. Als rotationssymmetrische Form wird hierbei eine Form bezeichnet, die bezüglich der Längsachse der Betätigungswelle rotationssymmetrisch ist. Der elektrische Schalter des Gasventils stellt Teil einer Zündvorrichtung dar. Als Zündvorrichtung wird im Sinne der vorliegenden Erfindung eine Vorrichtung verstanden, mittels derer ein Gasstrom an dem oder den Brennern entzündet wird. Hierzu umfasst die Zündvorrichtung vorzugsweise zumindest einen elektrischen Schalter zur Aktivierung eines Zündelementes, das Zündfunken erzeugt. Weiterhin umfasst die Zündvorrichtung eine Betätigungswelle, die zur Betätigung der Zündvorrichtung, insbesondere zur mittelbaren oder unmittelbaren Betätigung des elektrischen Schalters entlang der Längsachse der Betätigungswelle verschiebbar ist. Das Schaltelement des elektrischen Schalters ist vorzugsweise zu der Betätigungswelle benachbart und weist eine geringe Breite auf. Insbesondere weist das Schaltelement eine Kontaktfläche auf, die die Betätigungswelle nicht vollständig umgibt. Vielmehr ist das Schaltelement so ausgelegt und angeordnet, dass dieses nur in einen Teil des Winkelbereiches um die Betätigungswelle eingreift. Das Betätigungselement ist erfindungsgemäß an der Betätigungswelle befestigt. Erfindungsgemäß weist zusätzlich auch das Betätigungselement eine Form auf, die zumindest am äußeren Rand des Betätigungselementes von einer rotationssymmetrischen Form abweicht. Da zum Einwirken des Betätigungselementes auf das Schaltelement des elektrischen Schalters ein Kontakt zwischen dem Betätigungselement und dem Schaltelement erforderlich ist, ist somit der Winkelbereich der Betätigungswelle, das heißt die Winkel- oder Drehpositionen der Betätigungswelle, in dem ein Betätigen des elektrischen Schalters erfolgen kann, begrenzt. Dieser Winkelbereich wird im Folgenden auch als Zündbereich bezeichnet. Hierdurch kann das Betätigen der Zündvorrichtung auf Situationen beschränkt werden, in denen die Bedingungen in dem Gasventil eine ausreichende Sicherheit gewähren. Vorzugsweise ist der Zündbereich so gewählt, dass in diesem Bereich der Gasvolumenstrom in dem Gasventil zu dem Brenner auf einen Maximalwert eingestellt ist. Hierdurch wird sichergestellt, dass ausreichend Gas für eine Zündung durch den elektrischen Funken an dem Brenner zur Verfügung steht. Bei Gasvolumenströmen geringerer Menge, das heißt in anderen Winkelbereichen der Betätigungswelle kann das Betätigungselement nicht mit dem Schaltelement in Kontakt treten und ein Betätigen des elektrischen Schalters und damit ein Betätigen oder Aktivieren der Zündvorrichtung wird somit verhindert. Da bei dieser Stellung der Betätigungswelle allerdings nur eine geringe Menge an unverbranntem Gas aus dem Brenner austritt, ist die Gefahr für den Benutzer minimiert. Die Betätigung des elektrischen Schalters erkennt der Benutzer durch das Geräusch der Zündung des Zündelementes an dem Brenner oder durch eine haptische Rückmeldung, die bei der Betätigung des elektrischen Schalters über die Betätigungswelle zu spüren ist. Erkennt der Benutzer, dass keine Betätigung des elektrischen Schalters erfolgt, wird diese die Betätigungswelle so weit verdrehen, bis die Zündung erfolgt. Hierdurch wird verhindert, dass der Benutzer des Gerätes bei geringen Gasvolumenströmen erfolglos versucht die Zündung auszulösen, was zu einem ungewünschten Gasaustritt führt.The object is therefore achieved according to the invention by a gas valve with an actuating shaft which is rotatable about an axis for adjusting an opening cross-section of the gas valve and which is displaceable for actuating an electrical switch in the axial direction, wherein an actuating element is provided for the electrical switch, in Dependence on the axial position the actuating shaft acts on a switching element of the electrical switch. Wherein, in the gas valve, the actuating element has a shape which deviates at least at the outer edge of a rotationally symmetrical shape, and the actuating element has an actuating projection which extends in the radial direction to the outside. The gas valve is characterized in that the actuating projection on the underside has two active surfaces for selectively acting on the switching element of the electric switch, which are inclined to the longitudinal axis of the actuating shaft, lie on the underside of the actuating projection and together form a V-shape. As a rotationally symmetric shape in this case a shape is referred to, which is rotationally symmetrical with respect to the longitudinal axis of the actuating shaft. The electrical switch of the gas valve is part of an ignition device. For the purposes of the present invention, the ignition device is understood to be a device by means of which a gas stream is ignited on the burner (s). For this purpose, the ignition device preferably comprises at least one electrical switch for activating an ignition element, which generates ignition sparks. Furthermore, 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. The switching element of the electrical switch is preferably adjacent to the actuating shaft and has a small width. In particular, the switching element has a contact surface which does not completely surround the actuating shaft. Rather, the switching element is designed and arranged so that it engages only in a part of the angular range around the actuating shaft. The actuator is mounted according to the invention on the actuating shaft. According to the invention, the actuating element additionally has a shape which deviates from a rotationally symmetrical shape at least on the outer edge of the actuating element. Since a contact between the actuating element and the switching element is required for the action of the actuating element on the switching element of the electrical switch, thus the angular range of the actuating shaft, that is the angular or rotational positions of the actuating shaft in which actuation of the electrical switch can be limited , This angular range is also referred to below as the ignition range designated. Thereby, the operation of the ignition device can be limited to situations in which the conditions in the gas valve provide sufficient safety. Preferably, the ignition range is selected so that in this Range of gas flow in the gas valve is set to the burner 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, that is to say in other angular ranges of the actuating shaft, the actuating element can not come into contact with the switching element and an actuation of the electrical switch and thus actuation or activation of the ignition device is thus prevented. However, since only a small amount of unburned gas exits the burner at this position of the actuating shaft, the danger to the user is minimized. The operation of the electric switch detects the user by the sound of the ignition of the ignition element to the burner or by a haptic feedback, which is felt in the operation of the electric switch on the actuating shaft. If the user detects that no actuation of the electrical switch takes place, this will turn the actuating shaft until the ignition takes place. This prevents the user of the device with low gas flow rates unsuccessfully trying to trigger the ignition, resulting in an unwanted gas leakage.
Erfindungsgemäß weist das Betätigungselement einen Betätigungsvorsprung auf, der sich in radialer Richtung nach außen erstreckt. Als radiale Richtung wird hierbei die Richtung verstanden, in der der Radius der Betätigungswelle liegt. Der Betätigungsvorsprung deckt vorzugsweise nur einen geringen Bereich des Umfangs der Betätigungswelle ab. Besonders bevorzugt deckt der Vorsprung einen Bereich von weniger als 90° ab. Hierdurch wird der Zündbereich minimiert. Im Vergleich dazu würde sich bei einem Betätigungselement, bei dem beispielsweise eine Aussparung oder ein Schlitz in einer um die Betätigungswelle verlaufenden Scheibe vorgesehen ist, der Zündbereich über den gesamten Umfang der Scheibe mit Ausnahme der Aussparung oder des Schlitzes erstrecken und die erfindungsgemäß erzielbaren Vorteile können daher nicht oder nicht ausreichend erzielt werden.According to the invention, the actuating element has an actuating projection which extends in the radial direction to the outside. The radial direction is understood to be the direction in which the radius of the actuating shaft lies. The actuating projection preferably covers only a small portion of the circumference of the actuating shaft. Particularly preferably, the projection covers a range of less than 90 °. As a result, the ignition range is minimized. In comparison, in an actuator in which, for example, a recess or slit is provided in a disk extending around the actuator shaft, the ignition region would extend over the entire circumference of the disk except for the recess or slot, and the advantages attainable according to the present invention can therefore be achieved not or not sufficiently achieved.
Gemäß einer Ausführungsform umfasst das Betätigungselement ein Befestigungselement, vorzugsweise in Form einer Befestigungsscheibe, zur Befestigung an der Betätigungswelle. Das Befestigungselement kann aber auch eine andere Form aufweisen. Beispielsweise kann als Befestigungselement eine Hülse dienen, die an der Betätigungswelle befestigt wird und an deren Umfang ein Betätigungsvorsprung vorgesehen ist. Die Verwendung einer Befestigungsscheibe als Befestigungselement weist den Vorteil auf, dass das Schaltelement nicht in unmittelbarer Nähe des Umfangs der Betätigungswelle vorgesehen sein muss. Zudem kann durch eine Befestigungsscheibe die Länge eines radialen Betätigungsvorsprungs minimiert werden oder der Betätigungsvorsprung durch die Befestigungsscheibe unterstützt werden. Durch eine solche Unterstützung wird die Übertragung einer Druckkraft, die in die Betätigungswelle eingeleitet wurde, von dem Betätigungsvorsprung auf das Schaltelement zuverlässig gewährleistet.According to one embodiment, the actuating element comprises a fastening element, preferably in the form of a fastening washer, for attachment to the actuating shaft. The fastener may also have a different shape. For example, serve as a fastener, a sleeve which is attached to the actuating shaft and at the periphery of an actuating projection is provided. The use of a fastening washer as a fastening element has the advantage that the switching element is not in must be provided in the immediate vicinity of the circumference of the actuating shaft. In addition, the length of a radial actuating projection can be minimized or the actuating projection can be supported by the fastening disk by means of a fastening disk. By such a support, the transmission of a pressing force introduced into the operation shaft is reliably ensured by the operation projection on the switching element.
Vorzugsweise ist der radiale Betätigungsvorsprung am äußeren Rand der Befestigungsscheibe angeordnet. Bei dieser Ausführungsform kann die Länge des Betätigungsvorsprungs gering gewählt werden und somit ein Durchbiegen des Betätigungsvorsprungs bei der Betätigung des Schaltelementes verhindert werden.Preferably, the radial actuating projection is arranged on the outer edge of the fastening disc. In this embodiment, the length of the actuating projection can be selected to be small, and thus bending of the actuating projection during the actuation of the switching element can be prevented.
Erfindungsgemäß weist der Betätigungsvorsprung an dessen Unterseite zwei Wirkflächen zum wahlweise Einwirken auf das Schaltelement des elektrischen Schalters aufweist, die zu der Längsachse der Betätigungswelle geneigt liegen, an der Unterseite des Betätigungsvorsprungs liegen und zusammen eine V-Form bilden. Die Wirkfläche steht vorzugsweise in einem Winkel zu der Längsachse der Betätigungswelle, der in einem Bereich von 1° bis 85°, besonders bevorzugt im Bereich von 30° bis 60°, liegt. Als Unterseite wird hierbei die Seite des Betätigungsvorsprungs bezeichnet, die bei einer Unteransicht des Betätigungsvorsprungs sichtbar ist. Die Wirkfläche ist so angeordnet, dass deren untere Kante die Unterkante des Betätigungsvorsprungs darstellt. Die Wirkfläche kann somit gemäß der vorliegenden Erfindung auch eine Seitenfläche oder einen Teil einer Seitenfläche des Betätigungsvorsprungs darstellen. Die Wirkfläche ist so gegenüber der Längsachse der Betätigungswelle geneigt, dass die Verlängerung des Radius der Betätigungswelle parallel zu der Wirkfläche liegt. Durch das Vorsehen einer solchen Wirkfläche kann die Zuverlässigkeit der Funktionsweise des erfindungsgemäßen Gasventils weiter verbessert werden. Insbesondere ist eine exakte vertikale Ausrichtung des Betätigungsvorsprungs mit dem Schaltelement nicht erforderlich. Insbesondere kann bereits bei dem ersten in Kontakt Treten der Wirkfläche mit dem Schaltelement ein Betätigen des elektrischen Schalters bewirkt werden. Zudem ermöglicht das Vorsehen einer geneigten Wirkfläche das Drehen der Betätigungswelle in einem in das Gasventil eingedrückten Zustand auch bei einem Kontakt zwischen der Wirkfläche und dem Schaltelement.According to the invention, the actuating projection has on its underside two active surfaces for selectively acting on the switching element of the electrical switch, which are inclined to the longitudinal axis of the actuating shaft, lie on the underside of the actuating projection and together form a V-shape. The active surface is preferably at an angle to the longitudinal axis of the actuating shaft, which is in a range of 1 ° to 85 °, more preferably in the range of 30 ° to 60 °. As the underside of this case, the side of the actuating projection is referred to, which is visible in a bottom view of the actuating projection. The active surface is arranged so that its lower edge represents the lower edge of the actuating projection. The active surface may thus according to the present invention also constitute a side surface or a part of a side surface of the actuating projection. The active surface is inclined relative to the longitudinal axis of the actuating shaft, that the extension of the radius of the actuating shaft is parallel to the active surface. By providing such an effective surface, the reliability of the operation of the gas valve according to the invention can be further improved. In particular, an exact vertical alignment of the actuating projection with the switching element is not required. In particular, actuation of the electrical switch can already be effected at the first contact of the active surface with the switching element. In addition, the provision of an inclined active surface enables the rotation of the actuating shaft in a state pressed into the gas valve, even in contact between the active surface and the switching element.
Somit kann bei dieser Ausführungsform das Betätigen des elektrischen Schalters auf zwei Arten erfolgen. Zum einen kann die Betätigungswelle zunächst in eine Winkelposition gedreht werden, in der der Betätigungsvorsprung vertikal mit dem Schaltelement ausgerichtet ist. Wird in diesem Zustand die Betätigungswelle in Richtung auf das Gasventil bewegt, das heißt hereingedrückt, so wird das Schaltelement durch den Betätigungsvorsprung, insbesondere die untere Kante des Betätigungsvorsprungs, betätigt und somit die Aktivierung des Zündelementes und damit die Zündung an dem Gasbrenner verursacht. Anderseits kann die Betätigung des Schalters aber auch so erfolgen, dass die Betätigungswelle zunächst in einer Winkelposition, in der der Betätigungsvorsprung vertikal nicht mit dem Schaltelement ausgerichtet ist, hereingedrückt wird und erst anschließend in den Zündbereich gedreht wird. Hierbei gerät die Wirkfläche mit dem Schaltelement in Kontakt und das Schaltelement gleitet beim weiteren Drehen der Betätigungswelle an der Wirkfläche entlang, bis es die untere Kante der Wirkfläche und damit die untere Kante des Betätigungsvorsprungs erreicht hat. Aufgrund der Neigung der Wirkfläche, wird hierdurch das Schaltelement in Richtung auf den Schalter bewegt oder verschwenkt. Spätestens in dieser Position wird der elektrische Schalter betätigt und an dem Gasbrenner erfolgt die Zündung.Thus, in this embodiment, the actuation of the electrical switch can be done in two ways. Firstly, the actuating shaft can first be rotated in an angular position in which the actuating projection vertically with the Switching element is aligned. If in this state, the actuating shaft is moved in the direction of the gas valve, that is pressed in, the switching element is actuated by the actuating projection, in particular the lower edge of the actuating projection, and thus causes the activation of the ignition element and thus the ignition of the gas burner. On the other hand, however, the actuation of the switch can also take place in such a way that the actuating shaft is first pressed in at an angular position in which the actuating projection is not aligned vertically with the switching element and only subsequently turned into the ignition region. Here, the active surface gets in contact with the switching element and the switching element slides on further rotation of the actuating shaft along the active surface along until it has reached the lower edge of the active surface and thus the lower edge of the actuating projection. Due to the inclination of the active surface, thereby the switching element is moved or pivoted in the direction of the switch. At the latest in this position, the electrical switch is actuated and the ignition takes place at the gas burner.
Der Schaltweg des Schaltelementes kann so eingestellt sein, dass dieser der vertikalen Höhe der Wirkfläche entspricht. In diesem Fall erfolgt das Betätigen des Schalters erst in der Winkelposition, in der das Schaltelement mit der unteren Kante des Betätigungsvorsprungs in Kontakt ist. Alternativ ist es aber auch möglich den Schaltweg des Schaltelements geringer zu wählen. In dem Fall kann das Schalten des Schalters bereits in einer Winkelposition der Betätigungswelle erfolgen, in der die Oberseite des Schaltelementes an einer Stelle der Wirkfläche mit dieser in Kontakt steht, die höher liegt, als die untere Kante der Wirkfläche. Hierdurch wird der Zündbereich vergrößert.The switching path of the switching element can be set so that it corresponds to the vertical height of the active surface. In this case, the operation of the switch takes place only in the angular position in which the switching element is in contact with the lower edge of the actuating projection. Alternatively, it is also possible to choose the switching path of the switching element lower. In that case, the switching of the switch can already take place in an angular position of the actuating shaft, in which the upper side of the switching element is in contact with it at a position of the active surface which is higher than the lower edge of the active surface. As a result, the ignition range is increased.
Erfindungsgemäß weist der Betätigungsvorsprung zwei Wirkflächen zum wahlweise Einwirken auf das Schaltelement des elektrischen Schalters auf, die an der Unterseite des Betätigungsvorsprungs liegen und zusammen eine V-Form bilden. Die beiden Wirkflächen können an deren Unterkante aneinander anliegen. In diesem Fall ist bei einem Schaltweg, der auf die Unterkante des Betätigungsvorsprungs ausgelegt ist, das Betätigen des Schalters nur in einer einzigen Drehposition der Betätigungswelle möglich. Alternativ kann aber zwischen den Unterkanten der Wirkflächen auch eine horizontale Verbindungsfläche vorgesehen sein. Diese Verbindungsfläche dient dann auch als Wirkfläche zum Einwirken auf das Schaltelement des Schalters. In diesem Fall ist auch bei einem Schaltweg, der auf die Unterkante des Betätigungsvorsprungs ausgelegt ist, das Betätigen des Schalters über den Winkelbereich möglich, der von der Verbindungsfläche abgedeckt ist. Ein Vorteil einer Ausführungsform, bei der zwei Wirkflächen vorgesehen sind, besteht darin, dass die Betätigung des Schalters auch bei Hereingedrückter Betätigungswelle unabhängig von der Drehrichtung der Betätigungswelle erfolgen kann.According to the invention, the actuating projection on two active surfaces for selectively acting on the switching element of the electrical switch, which lie on the underside of the actuating projection and together form a V-shape. The two active surfaces can abut each other at their lower edge. In this case, in a switching path which is designed on the lower edge of the actuating projection, the actuation of the switch is possible only in a single rotational position of the actuating shaft. Alternatively, however, a horizontal connection surface can also be provided between the lower edges of the active surfaces. This connection surface then also serves as an effective surface for acting on the switching element of the switch. In this case, even with a switching path which is designed on the lower edge of the actuating projection, the Actuation of the switch is possible over the angular range covered by the connection surface. An advantage of an embodiment in which two active surfaces are provided, is that the actuation of the switch can be carried out regardless of the direction of rotation of the actuating shaft even when pressed-in actuating shaft.
Gemäß einer Ausführungsform liegt das Schaltelement in Form eines Schaltarms vor, der sich über das Gehäuse des Schalters hinaus erstreckt. Als Schaltarm wird ein sich längs erstreckendes Schaltelement bezeichnet, das durch Kraftaufbringung in dessen Längsrichtung zur Betätigung des Schalters führt. Der Schaltarm kann hierbei axial verschoben werden oder verschwenkt werden. Durch die Verwendung eines Schaltarms wird es möglich das Betätigungselement in einem größeren axialen Abstand zu dem Schaltergehäuse an der Betätigungswelle vorzusehen.According to one embodiment, the switching element is in the form of a switching arm which extends beyond the housing of the switch. As a switching arm, a longitudinally extending switching element is referred to, which leads by force application in the longitudinal direction for actuating the switch. The switching arm can hereby be moved axially or pivoted. By using a switching arm, it is possible to provide the actuating element at a greater axial distance from the switch housing on the actuating shaft.
Vorzugsweise weist das Betätigungselement eine Aufnahmeöffnung für die Betätigungswelle auf und die Aufnahmeöffnung und die Betätigungswelle weisen zumindest bereichsweise eine Form auf, die von einer rotationssymmetrischen Form abweicht. Durch die Aufnahmeöffnung kann die Betätigungswelle in das Betätigungselement eingeführt werden. Indem die Form der Aufnahmeöffnung und der Betätigungswelle zumindest in dem Bereich, in dem diese aneinander befestigt werden, von einer rotationssymmetrischen Form abweichen, sind diese beiden Bauteile verdrehsicher aneinander befestigt. Die Form der Aufnahmeöffnung entspricht hierzu der Form der Betätigungswelle in dem Befestigungsbereich. Beispielsweise kann an der Betätigungswelle, die einen kreisrunden Querschnitt aufweist, eine Abflachung vorgesehen sein. Eine entsprechende Abflachung ist dann auch an der kreisrunden Aufnahmeöffnung vorgesehen. Indem das Betätigungselement verdrehsicher an der Betätigungswelle vorgesehen ist, kann sicher gestellt werden, dass der Zündbereich in dem Bereich liegt, in dem die Drehposition der Betätigungswelle einen großen Querschnitt im Gasventil für den Gasdurchlass einstellt.Preferably, the actuating element has a receiving opening for the actuating shaft and the receiving opening and the actuating shaft have at least partially a shape which deviates from a rotationally symmetrical shape. Through the receiving opening, the actuating shaft can be inserted into the actuating element. Since the shape of the receiving opening and of the actuating shaft deviate from a rotationally symmetrical shape at least in the region in which they are fastened to one another, these two components are secured against rotation to one another. The shape of the receiving opening corresponds to the shape of the actuating shaft in the mounting area. For example, a flattening may be provided on the actuating shaft, which has a circular cross-section. A corresponding flattening is then also provided at the circular receiving opening. By providing the actuating member against rotation on the actuating shaft, it can be ensured that the ignition region lies in the region in which the rotational position of the actuating shaft sets a large cross section in the gas valve for the gas passage.
Das Betätigungselement ist vorzugsweise an der Betätigungswelle über eine Nut in der Betätigungswelle befestigt. Die Nut kann an der Betätigungswelle umlaufend vorgesehen sein. Durch diese zusätzliche Fixierung kann eine Kraftübertragung von der Betätigungswelle über das Betätigungselement auf das Schaltelement gewährleistet werden. Durch Befestigung des Betätigungselementes in einer Nut kann nämlich eine axiale Bewegung des Betätigungselementes bezüglich der Betätigungswelle vermieden werden. Besonders bevorzugt erfolgt die Befestigung an der Nut mittels Rastnasen, die in einer Aufnahmeöffnung des Betätigungselementes zur Aufnahme der Betätigungswelle vorgesehen sind.The actuating element is preferably fastened to the actuating shaft via a groove in the actuating shaft. The groove may be provided circumferentially on the actuating shaft. By this additional fixation, a power transmission from the actuating shaft via the actuating element to the switching element can be ensured. By fixing the actuating element in a groove can namely an axial movement of the actuating element with respect to the Actuating shaft can be avoided. Particularly preferably, the attachment to the groove by means of locking lugs, which are provided in a receiving opening of the actuating element for receiving the actuating shaft.
In einem Ruhezustand des Gasventils sind vorzugsweise die Unterkante des Betätigungsvorsprungs und die Oberkante des Schaltelementes des elektrischen Schalters in axialer Richtung voneinander beabstandet. Als Ruhezustand wird hierbei der Zustand des Gasventils bezeichnet, in dem von außen keine Kräfte, insbesondere keine Druckkräfte durch den Benutzer auf die Betätigungswelle ausgeübt werden. Dieser Ruhezustand liegt beispielsweise während des Betriebs des Gasbrenners nach dem Zünden vor. Indem in diesem Zustand ein axialer Abstand zwischen der Unterkante des Betätigungsvorsprungs und der Oberkante des Schaltelementes besteht, kommt es bei einer Drehbewegung der Betätigungswelle nicht zu einen erneuten Zünden. Zudem bringt diese Ausführungsform den Vorteil mit sich, dass die Sicherheit weiter gesteigert ist. Bei dieser Ausführungsform des Gasventils ist es nämlich zur Betätigung des elektrischen Schalters sowohl notwendig die Betätigungswelle und damit das Betätigungselement so zu drehen, dass ein an dem Betätigungselement vorgesehener Betätigungsvorsprung in dem Zündbereich liegt als auch die Betätigungswelle axial zu verschieben, das heißt hineinzudrücken.In an idle state of the gas valve preferably the lower edge of the actuating projection and the upper edge of the switching element of the electrical switch are spaced apart in the axial direction. In this case, the state of the gas valve is referred to as idle state in which no forces, in particular no pressure forces, are exerted by the user on the actuating shaft from the outside. This idle state is present, for example, during operation of the gas burner after ignition. By having an axial distance between the lower edge of the actuating projection and the upper edge of the switching element in this state, it does not come to a renewed ignition at a rotational movement of the actuating shaft. In addition, this embodiment has the advantage that the security is further increased. In this embodiment of the gas valve, it is necessary for the actuation of the electrical switch both the actuating shaft and thus the actuating element to rotate so that an actuating projection provided on the actuating projection is located in the ignition area as well as the actuating shaft to move axially, that is to press it.
Die Erfindung wird im Folgenden erneut unter Bezugnahme auf die beiliegenden Zeichnungen erläutert. Hierbei zeigen:
- Figur 1:
- eine schematische, perspektivische Ansicht einer Ausführungsform des erfindungsgemäßen Gasventils;
- Figur 2:
- eine schematische Draufsicht auf das Betätigungselement nach
Figur 1 ; - Figur 3:
- eine schematische Ansicht eines Schnitts durch das Gasventil nach
Figur 1 entlang der Schnittlinie A-A; - Figur 4:
- eine schematische Ansicht eines Schnitts durch das Gasventil nach
Figur 1 entlang der Schnittlinie B-B; - Figur 5:
- eine schematische, perspektivische Draufsicht auf das Betätigungselement des Gasventils nach
Figur 1 ; - Figur 6:
- eine schematische, perspektivische Unteransicht des Betätigungselementes des Gasventils nach
Figur 1 ; und - Figur 7:
- eine schematische Schnittansicht entlang der Schnittlinie C-C in
Figur 5 .
- FIG. 1:
- a schematic, perspective view of an embodiment of the gas valve according to the invention;
- FIG. 2:
- a schematic plan view of the actuator after
FIG. 1 ; - FIG. 3:
- a schematic view of a section through the gas valve after
FIG. 1 along the section line AA; - FIG. 4:
- a schematic view of a section through the gas valve after
FIG. 1 along the section line BB; - FIG. 5:
- a schematic, perspective top view of the actuating element of the gas valve according to
FIG. 1 ; - FIG. 6:
- a schematic, perspective bottom view of the actuating element of the gas valve according to
FIG. 1 ; and - FIG. 7:
- a schematic sectional view along the section line CC in
FIG. 5 ,
In
Über die Gasleitung 2 wird Gas von dem Gasventil 1 zu einem nicht dargestellten Brenner geleitet. Auf der Oberseite des Grundkörpers 10 des Gasventils 1 ist ein elektrischer Schalter 31 angeordnet. Der elektrische Schalter 31 dient insbesondere als Zündschalter für das Gasventil 1. Bei Betätigung des elektrischen Schalters 31 wird ein nicht dargestelltes Zündelement aktiviert, mittels dessen ein mit dem Gasventil 1 verbundener Brenner (nicht gezeigt) gezündet wird. Über die Oberseite des Gehäuses des elektrischen Schalters 31 ragt in der dargestellten Ausführungsform ein Schaltarm 311 nach oben hinaus.Via the gas line 2, gas is passed from the gas valve 1 to a burner, not shown. On the upper side of the
Durch den elektrischen Schalter 31 ist weiterhin eine Betätigungswelle 30 geführt, die über den elektrischen Schalter 31 nach oben hinausragt und bis in den Grundkörper 10 des Gasventils 1 reicht. In dem Bereich der Betätigungswelle 30, in dem diese nach oben über den elektrischen Schalter 31 hinausragt, weicht der Querschnitt der Betätigungswelle 30 zumindest im oberen Teil von dem runden Querschnitt der Betätigungswelle 30 über deren weitere Länge ab. Insbesondere ist an der Betätigungswelle 30 eine Abflachung 301 vorgesehen.By the
An der Betätigungswelle 30 ist oberhalb des elektrischen Schalters 31 in einem Abstand zu der Oberseite des elektrischen Schalters 31 ein Betätigungselement 32 befestigt. Das Betätigungselement 32 umfasst in der dargestellten Ausführungsform eine Befestigungsscheibe 320, die sich radial von der Betätigungswelle 30 aus erstreckt. An dem äußeren Rand der Befestigungsscheibe 320 ist an einer Stelle ein Betätigungsvorsprung 321 vorgesehen, der sich in radialer Richtung von dem äußeren Rand der Befestigungsscheibe 320 aus nach außen erstreckt. Der Betätigungsvorsprung 321 ist in der dargestellten Ausführungsform an einem Flansch der Befestigungsscheibe 320 angebracht, der an dem äußeren Umfang der Befestigungsscheibe 320 nach unten ragt.On the actuating
In der Befestigungsscheibe 320 ist eine Aufnahmeöffnung 3202 zur Aufnahme beziehungsweise für den Durchlass der Betätigungswelle 30 eingebracht. Wie sich aus den
Wie sich aus den
Die Betätigungswelle 30 ist so in dem Grundkörper 10 des Gasventils 1 gelagert, dass diese um deren Längsachse 300 drehbar ist. Zudem kann die Betätigungswelle 30 entlang deren Längsachse 300 axial bewegt, das heißt verschoben werden. Hierbei erfolgt ein Verschieben der Betätigungswelle 30 in Richtung auf den Grundkörper 10 des Gasventils 1 von einem Ruhezustand oder einer Ruhestellung aus durch Aufbringen eines Drucks auf die Betätigungswelle 30 gegen die Federkraft einer inneren Ventilfeder (nicht gezeigt) in dem Grundkörper 10 des Gasventils 1. Diese Bewegung wird auch als Hereindrücken der Betätigungswelle 30 bezeichnet. Wird die Druckkraft von der Betätigungswelle 30 genommen, verschiebt die Betätigungswelle 30 sich daher wieder in die Ruhestellung.The actuating
Der Betätigungsvorsprung 321, der in den
Eine Funktionsweise des Gasventils 1 wird nun genauer erläutert. In der
Die Erfindung ist nicht auf die dargestellte Ausführungsform begrenzt. Insbesondere können die Wirkflächen auch einen anderen als der gezeigte Winkel zu der Längsachse der Betätigungswelle aufweisen.The invention is not limited to the illustrated embodiment. In particular, the active surfaces may also have an angle other than the angle to the longitudinal axis of the actuating shaft.
- 11
- Gasventilgas valve
- 1010
- Grundkörperbody
- 22
- Gasleitunggas pipe
- 33
- Zündvorrichtungdetonator
- 3030
- Betätigungswelleactuating shaft
- 300300
- Längsachselongitudinal axis
- 301301
- Abflachungflattening
- 302302
- Nutgroove
- 3131
- elektrischer Schalterelectrical switch
- 311311
- Schaltarmshifting
- 3232
- Betätigungselementjig
- 320320
- Befestigungsscheibemounting disk
- 32013201
- Rastarmdetent arm
- 32023202
- Aufnahmeöffnungreceiving opening
- 32033203
- Abflachungflattening
- 32043204
- Schlitzslot
- 32053205
- Rastnaselocking lug
- 321321
- Betätigungsvorsprungoperating projection
- 32113211
- Wirkflächeeffective area
- 32123212
- Wirkflächeeffective area
Claims (7)
- Gas valve with an actuating shaft (30), which can be rotated about a longitudinal axis (300) to adjust an opening cross-section of the gas valve (1) and which can be displaced in the axial direction to actuate an electrical switch (31), wherein an actuating element (32), which is fastened to the actuating shaft, is provided for the electrical switch (31), wherein the actuating element (32) acts on a switch element of the electrical switch (31) as a function of the axial position of the actuating shaft (30), wherein the actuating element (32) has a shape which deviated from a rotationally symmetrical shape at least on the outer edge, and the actuating element (32) has an actuating projection (321), which extends outwards in the radial direction, characterised in that on the underside thereof, it has two active surfaces (3211, 3212) for optionally acting on the switch element of the electrical switch (31), which lie at an inclination towards the longitudinal axis (300) of the actuating shaft (30), lie on the underside of the actuating projection (321) and together form a V-shape.
- Gas valve according to claim 1, characterised in that the actuating element (32) comprises a fastening disc (320) for fastening to the actuating shaft (30).
- Gas valve according to claim 2, characterised in that the radial actuating projection (321) is arranged on the outer edge of the fastening disc (320).
- Gas valve according to one of claims 1 to 3, characterised in that the switch element is present in the shape of a switch arm (311), which extends beyond the housing of the switch (31).
- Gas valve according to one of claims 1 to 4, characterised in that the actuating element (32) has a receiving opening (3202) for the actuating shaft (30) and the receiving opening (3202) and the actuating shaft (30) at least in regions form a shape which deviates from a rotationally symmetrical shape.
- Gas valve according to one of claims 1 to 5, characterised in that the actuating element (32) is fastened to the actuating shaft (30) via a groove (302) in the actuating shaft (30).
- Gas valve according to one of claims 1 to 6, characterised in that in an idle state of the gas valve (1) the bottom edge of the actuating projection (321) and the top edge of the switch element of the electrical switch (31) are spaced apart from one another in the axial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11166644.2A EP2390575B1 (en) | 2010-05-24 | 2011-05-19 | Gas valve with an actuating device for an electric switch |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10382139 | 2010-05-24 | ||
ES201030827A ES2394699A2 (en) | 2010-05-24 | 2010-05-31 | Gas valve with a drive element for an electrical switch (Machine-translation by Google Translate, not legally binding) |
EP11166644.2A EP2390575B1 (en) | 2010-05-24 | 2011-05-19 | Gas valve with an actuating device for an electric switch |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2390575A2 EP2390575A2 (en) | 2011-11-30 |
EP2390575A3 EP2390575A3 (en) | 2013-01-09 |
EP2390575B1 true EP2390575B1 (en) | 2018-01-03 |
Family
ID=44680740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11166644.2A Not-in-force EP2390575B1 (en) | 2010-05-24 | 2011-05-19 | Gas valve with an actuating device for an electric switch |
Country Status (1)
Country | Link |
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EP (1) | EP2390575B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103195949A (en) * | 2013-05-02 | 2013-07-10 | 广西宜州市火焱节能科技有限公司 | Micro-flow liquid valve |
WO2016050271A1 (en) * | 2014-09-30 | 2016-04-07 | Arcelik Anonim Sirketi | A cooking device having a safety arrangement with an internal lighting system |
WO2019129405A1 (en) | 2017-12-25 | 2019-07-04 | Arcelik Anonim Sirketi | A cooker comprising an ignition washer |
CN108150664B (en) * | 2018-01-31 | 2024-04-26 | 佛山市云米电器科技有限公司 | Mechanical valve for enhancing remote fire closing safety |
EP3746708A4 (en) * | 2018-02-02 | 2021-11-03 | Yesa Elektronik Sanayi Ve Ticaret Anonim Sirketi | Liquid impermeable switch chain/harness with cable |
EP3772613A1 (en) * | 2019-08-06 | 2021-02-10 | Ferel Elektronik Sanay Ticaret Anonim Sirketi | A transmission mechanism for push-button switches |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0492057A1 (en) * | 1990-12-22 | 1992-07-01 | Elektro- und Gas-Armaturen-Fabrik GmbH | Gas-cock |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6903450A (en) * | 1969-03-06 | 1970-09-08 | ||
IT248927Y1 (en) * | 1999-03-08 | 2003-03-06 | Merloni Elettrodomestici Spa | DOMESTIC GAS COOKING APPLIANCES WITH SIMPLIFIED SPARK IGNITION DEVICE |
ITTO20030581A1 (en) | 2003-07-25 | 2005-01-26 | Itw Ind Components Srl | INTEGRATED UNIVERSAL CONTROL UNIT FOR FIREWORKS |
ITTO20070306A1 (en) * | 2007-05-04 | 2008-11-05 | Itw Ind Components S R L Co N | CONTROL DEVICE INCLUDING A GAS TAP AND A CATENARY ELEMENT FOR BURNERS OF A COOKING HOB |
ITTO20070638A1 (en) * | 2007-09-11 | 2009-03-12 | Itw Ind Components S R L Co N | ROTARY CONTROL DEVICE INCLUDING A GAS TAP AND A CATENARY ELEMENT FOR BURNERS OF A COOKING HOB |
-
2011
- 2011-05-19 EP EP11166644.2A patent/EP2390575B1/en not_active Not-in-force
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0492057A1 (en) * | 1990-12-22 | 1992-07-01 | Elektro- und Gas-Armaturen-Fabrik GmbH | Gas-cock |
Also Published As
Publication number | Publication date |
---|---|
EP2390575A3 (en) | 2013-01-09 |
EP2390575A2 (en) | 2011-11-30 |
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