EP2652402B1 - Gas valve unit comprising a lift deflection system - Google Patents

Gas valve unit comprising a lift deflection system Download PDF

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Publication number
EP2652402B1
EP2652402B1 EP11794707.7A EP11794707A EP2652402B1 EP 2652402 B1 EP2652402 B1 EP 2652402B1 EP 11794707 A EP11794707 A EP 11794707A EP 2652402 B1 EP2652402 B1 EP 2652402B1
Authority
EP
European Patent Office
Prior art keywords
gas
valve
actuation pin
valve unit
shut
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.)
Active
Application number
EP11794707.7A
Other languages
German (de)
French (fr)
Other versions
EP2652402A2 (en
Inventor
Jörn Naumann
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 Hausgeraete GmbH
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Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to EP11794707.7A priority Critical patent/EP2652402B1/en
Publication of EP2652402A2 publication Critical patent/EP2652402A2/en
Application granted granted Critical
Publication of EP2652402B1 publication Critical patent/EP2652402B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • F23K5/007—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/22—Fuel valves cooperating with magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/24—Valve details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/10—High or low fire

Definitions

  • the invention relates to a gas valve unit for setting a gas volume flow supplied to a gas burner of a gas appliance, in particular a gas cooking appliance, the gas valve unit having a valve housing and an actuating shaft which protrudes with an operating section from the valve housing, and wherein a shut-off valve is formed in the valve housing.
  • Gas valve units of this type are often referred to as secured gas valves.
  • the gas valve unit has a variable opening cross-section that can be adjusted via the actuating shaft.
  • the opening cross-section can be adjusted continuously.
  • the size of the gas volume flow flowing through the gas valve unit and thus the size of the flame on the gas burner depends directly on the opening cross section.
  • the opening cross-section can be set to zero in generic gas valve units, that is to say the gas valve unit can be completely closed.
  • the gas valve unit has a shut-off valve that can be actuated independently of the setting of the opening cross-section.
  • the shut-off valve usually has an open switch position and a closed switch position, but no intermediate positions. When the shut-off valve is closed, the gas flow through the gas valve unit is completely interrupted. The opened shut-off valve, however, has no influence on the opening cross-section of the gas valve unit.
  • the shut-off valve serves, on the one hand, to ensure that the gas valve unit closes completely redundantly. On the other hand, it is possible to operate the shut-off valve automatically, for example as a function of the signal from a flame sensor.
  • Known gas valve units of the type mentioned at the beginning are usually designed as a plug valve.
  • the opening cross-section is set as a function of the rotational position of a plug that can rotate in a valve seat.
  • the actuating shaft is arranged coaxially with the plug and connected to it.
  • the opening cross-section of the gas valve unit is adjusted by turning the actuating shaft set.
  • the shut-off valve can be opened by pressing the same operating shaft.
  • Gas valve units of this type often have an unfavorable switching behavior.
  • the opening cross section can often only be set imprecisely and not reproducibly.
  • the WO 90/12255 describes a control valve with several on-off valves and a shut-off device.
  • the DE 10 2008 027 546 A1 describes a combined valve device with an open-close valve and a so-called bipolar valve.
  • the EP 1 672 279 A1 describes a gas valve for a gas burner with a rotatable valve plug.
  • the invention is a gas valve unit according to claim 1.
  • the present invention is based on the object of providing a generic gas valve unit with improved switching behavior.
  • At least two open-close valves are formed in the valve housing, the open-close valves being operable by rotating the actuating shaft and the shut-off valve being actuated by axially displacing the actuating shaft.
  • the open-close valves serve to set the opening cross-section of the gas valve unit, and thus the size of the gas volume flow flowing through the gas valve unit. This can be done, for example, in that the open-close valves are opened and closed again one after the other.
  • the open-close valves are controlled by turning the actuating shaft.
  • the gas valve unit has an additional shut-off valve which, in the closed state, completely interrupts the gas flow through the valve unit.
  • the shut-off valve In the open state, the shut-off valve has such a large opening cross section that the size of the gas volume flow is determined solely by opening and closing the open-close valves.
  • the shut-off valve is actuated by moving the actuating shaft axially. This means that both the open-close valves and the shut-off valve can be actuated via the same actuating shaft.
  • At least two throttle points each with at least one throttle opening, through which gas can flow depending on the switching position of the open-close valves, are particularly advantageously formed in the valve housing.
  • exactly one throttle point is assigned to each open-close valve.
  • gas can flow through this throttle point; when the on-off valve is closed, the throttle point assigned to this on-off valve cannot be flowed through with gas directly from the gas inlet, but at most via a detour through other throttle points .
  • the shut-off valve is preferably arranged in the region of a gas inlet of the gas valve unit.
  • the shut-off valve When the shut-off valve is closed, there is no gas at any of the open-close valves or at any throttle point. If there are leaks in the area of the open-close valves or the throttle points, gas is reliably prevented from flowing out of these leaks when the shut-off valve is closed.
  • the shut-off valve preferably has a movable shut-off element.
  • the shut-off element can be formed, for example, by an axially movable valve disk which, in the closed state, presses on an annular valve seat.
  • the movable shut-off element of the shut-off valve is preloaded in the closing direction, in particular by means of spring force. As a result, the shut-off valve is always closed when the gas appliance is inoperative.
  • the movable shut-off element of the shut-off valve can be moved into an open position by pressing the actuating shaft against the bias. The pushing movement of the actuating shaft is transmitted directly or indirectly to the shut-off element. In the open position, the shut-off element is lifted from the valve seat of the shut-off valve, thereby releasing the gas path from the gas inlet of the valve housing in the direction of the open-close valves.
  • the movable shut-off element of the shut-off valve can be held in the open position counter to the spring force by means of the force of a magnetic coil.
  • the shut-off valve has a magnetic coil with which a force acting in the opening direction can also be exerted on the shut-off element.
  • the magnetic coil can have voltage applied to it, for example, from a thermocouple or from an electronic controller.
  • the magnetic coil is designed in such a way that the shut-off element, which is already in the open position, can be held in this position by means of the force of the magnetic coil. On the other hand, it is not possible to move the shut-off element from a closed position into the open position by means of the force of the magnetic coil.
  • the magnetic coil is coupled to a flame sensor in the area of a gas burner in such a way that the shut-off valve is kept open when a gas flame is burning on the gas burner. After the gas flame has gone out, the Power supply to the solenoid is interrupted and the shut-off valve closes automatically by means of spring force.
  • a deflection device which converts an axial movement of the actuating shaft into an axial movement of the shut-off element of the shut-off valve that is substantially perpendicular thereto.
  • the direction of movement of the shut-off element is perpendicular to the axial actuation direction of the actuation shaft.
  • the deflecting device preferably has a first sliding element which is arranged on the actuating shaft in the region of the end of the actuating shaft opposite the operating section.
  • the first sliding element is moved along with it.
  • the first sliding element and the actuating shaft can, for example, be made in one piece.
  • the first sliding element is preferably designed as a first conical element in such a way that a tip of the first conical element points away from the operating section of the actuating shaft.
  • the first conical element moves in the direction of its tip.
  • the spatial position of the first conical element does not change because it is rotated about its axis of symmetry.
  • the deflecting device preferably has a second sliding element, which is in contact with the first sliding element at least while the actuating shaft is being pressed.
  • the second sliding element slides on the first sliding element.
  • the second sliding element is preferably designed as a second conical element, the central axis of which is arranged essentially perpendicular to the actuating shaft and the tip of which points in the direction of the first sliding element.
  • the design of the second sliding element as a second conical element has the advantage that the rotational position of the second conical element with respect to its axis of symmetry has no effect on the functioning of the deflection device.
  • the first sliding element and the second sliding element are designed and arranged in such a way that an axial displacement of the actuating shaft as a result of pressing on the operating section is converted into an axial displacement of the second sliding element in the direction away from the actuating shaft.
  • the second sliding element is in operative connection with the shut-off element of the shut-off valve in such a way that an axial movement of the second sliding element in the direction away from the actuating shaft is transmitted to the shut-off element.
  • the shut-off element of the shut-off valve is lifted from its valve seat and the shut-off valve is thereby opened.
  • an actuating device for the on-off valves is provided in the gas valve unit, which actuating device is coupled to the actuating shaft by means of a coupling device at an end of the actuating shaft located inside the valve housing.
  • the actuating device comprises, for example, a permanent magnet which can be moved relative to the open-close valves. A rotational movement of the actuating shaft is transmitted to the actuating device for the on-off valves by means of the coupling device.
  • the coupling device is designed in such a way that the actuating device is coupled to the actuating shaft in a rotationally rigid manner.
  • the coupling device is designed in such a way that an axial displacement of the actuating shaft is not transmitted to the actuating device.
  • the coupling device has a slot-shaped recess on an end face of the end of the actuating shaft opposite the operating section.
  • the coupling device further comprises a flat driver which engages in the slot-shaped recess.
  • the flat driver engaging in the slot-shaped recess allows the transmission of a torque from the actuating shaft to the actuating device of the open-close valves. Compensating for an axial movement the actuating shaft takes place in that the flat driver is inserted more or less far into the slot-shaped recess.
  • the recess is arranged in a base of a third conical element which is formed on the actuating shaft in the area of the end of the actuating shaft opposite the operating section, in such a way that a tip of the third conical element points in the direction of the operating section of the actuating shaft and with a Tip of the first conical element is connected.
  • the design of the end of the actuating shaft as a conical element has the advantage that the spatial extent of a conical element does not change when the actuating shaft is rotated. There is thus no risk of inadvertent movement of the second sliding element as a result of it inadvertently coming into contact with the third conical element.
  • FIGS. 1 to 3 show the switching arrangement of the on-off valves 3 (3.1 to 3.5) and the throttle points 4 (4.1 to 4.5) of the gas valve unit.
  • the shut-off valve according to the invention is not shown here, however.
  • a gas inlet 1 can be seen with which the gas valve unit is connected, for example, to a main gas line of a gas cooking appliance.
  • the gas provided for combustion is present at a constant pressure of, for example, 20 millibars or 50 millibars.
  • a gas line leading, for example, to a gas burner of the gas cooking appliance is connected to a gas outlet 2 of the gas valve unit.
  • the gas inlet 1 is connected to the inlet side of the five open-close valves 3 (3.1 to 3.5) in the present exemplary embodiment via a gas inlet space 9 of the gas valve unit. By opening the open-close valves 3, the gas inlet 1 is connected to a specific section of a throttle section 5 into which the gas flows through the open open-close valve 3.
  • the throttle section 5 comprises an input section 7 into which the first open-close valve 3.1 opens.
  • the further open-close valves 3.2 to 3.5 each open into a connecting section 6 (6.1 to 6.4) of the throttle section 5.
  • the transition between the input section 7 and the first connecting section 6.1, as well as the transitions between two adjacent connecting sections 6.1 to 6.4 are each formed by a throttle point 4 (4.1 to 4.5).
  • the last throttle point 4.5 connects the last connection section 6.4 with the gas outlet 2.
  • the throttle points 4.1 to 4.5 have an opening cross-section that increases in sequence.
  • the flow cross-section of the last throttle point 4.5 can be selected to be so large that the last throttle point 4.5 has practically no throttle function.
  • the open-close valves 3 are actuated by means of a permanent magnet 8, which is displaceable along the row of open-close valves 3.
  • the force for opening the respective open-close valve 3 is generated directly from the magnetic force of the permanent magnet 8. This magnetic force opens the respective open-close valve 3 against a spring force.
  • Figure 2 shows the schematic switching arrangement in which the permanent magnet 8 is shifted to the right in the drawing in such a way that both the first open-close valve 3.1 and the second open-close valve 3.2 are open.
  • the gas flows through the opened second open-close valve 3.2 from the gas inlet space 9 directly into the first connection section 6.1 and from there via the throttle points 4.2 to 4.5 to the gas outlet 2.
  • the gas flowing to the gas outlet 2 bypasses the open open-close Valve 3.2, the first throttle point 4.1.
  • the gas volume flow in the switch position according to Figure 2 is therefore greater than the gas volume flow in the switch position according to Figure 1 .
  • the gas flow to the first connection section 6.1 takes place practically exclusively via the second open-close valve 3.2. Because of the open on-off valves 3.1 and 3.2, the same pressure level prevails in the inlet section 7 as in the first connecting section 6.1. Virtually no gas therefore flows from the inlet section 7 via the first throttle point 4.1 into the first connecting section 6.1.
  • the total gas volume flow flowing through the gas valve unit therefore practically does not change when the permanent magnet 8 continues is moved to the right in the drawing and thereby the first open-close valve 3.1 is closed when the second open-close valve 3.2 is open.
  • FIG 3 shows the schematic circuit arrangement of the gas valve unit in the fully open position.
  • the permanent magnet 8 is in its end position on the right-hand side in the drawing.
  • the last open-close valve 3.5 is open in this position of the permanent magnet 8.
  • gas flows directly from the gas inlet space 9 into the last connecting section 6.4 and only passes through the last throttle point 4.5 on the way to the gas outlet 2.
  • This last throttle point 4.5 can have such a large flow cross-section that practically no throttling of the gas flow occurs and the gas can flow through the gas valve unit in a practically unthrottled manner.
  • Figure 4 shows schematically a structural design of a gas valve unit with a switching arrangement according to Figure 1 to 3 .
  • the shut-off valve according to the invention is also not shown here.
  • valve body 20 in which the gas inlet 1 of the gas valve unit is implemented. Inside the valve body 20 is a gas inlet chamber 9 connected to the gas inlet 1.
  • Shut-off bodies 10 of the open-close valves 3 are guided in the valve body 20 so that they can move up and down in the drawing.
  • Each shut-off body 10 is pretensioned by means of a spring 11 downward in the drawing.
  • each shut-off body 10 can be moved against the force of the spring 11 towards the top in the drawing.
  • the springs 11 press the shut-off bodies onto a valve sealing plate 12, so that the shut-off bodies 10 close openings 12a present in the valve sealing plate 12 in a gas-tight manner.
  • a pressure plate 13 is arranged below the valve sealing plate 12, with openings 13 a which correspond to the openings 12 a in the valve sealing plate 12.
  • the openings 13a in the pressure plate 13 open into openings 14a in a first gas distribution plate 14.
  • a throttle plate 15 with a plurality of throttle openings 18.
  • Each of the Throttle points 4.1 to 4.4 are formed by two throttle openings 18.
  • the two throttle openings 18 belonging to a throttle point 4.1 to 4.4 are each connected to one another by means of the openings 16 a in a second gas distribution plate 16.
  • the openings 14a in the first gas distribution plate connect the throttle openings 18 lying next to one another in two adjacent throttle points 4.1 to 4.5.
  • the last throttle point 4.5 consists of only one throttle opening 18, which opens into the gas outlet 2 of the gas valve unit via a corresponding opening 16a in the second gas distribution plate 16.
  • the permanent magnet 8 With the switch position according to Figure 4 the permanent magnet 8 is in an end position in which all open-close valves 3 are closed. The gas valve unit is thus closed as a whole. The gas volume flow is zero. Starting from this switching position, the permanent magnet 8 is moved to the right in the drawing, whereby the on-off valves 3 arranged below the permanent magnet 8 are opened.
  • FIG. 5 shows the schematic structure of the gas valve arrangement according to the invention.
  • the essentially rotationally symmetrical valve housing 20 with a centrally arranged actuating shaft 31 can be seen.
  • the five open-close valves 3, for example, are arranged along a circular arc around the actuating shaft 31.
  • At the upper end of the actuating shaft 31 is its operating section 29, onto which, for example, a rotary knob can be attached.
  • At the lower end of the actuating shaft 31 an actuating device 25 is arranged, at the outer end of which the permanent magnet 8 is arranged.
  • the confirmation shaft 31 is rotated, the permanent magnet 8 moves past the open-close valves 3 along an arc.
  • Exactly the open-close valves 3, which are located directly above the permanent magnet 8, are opened by the magnetic force of the permanent magnet 8.
  • a cover 30 is formed on the upper side of the valve body in which, from bottom to top, the valve sealing plate 12, the pressure plate 13, the first gas distribution plate 14, the throttle plate 15 and the second gas distribution plate 16 are arranged.
  • the plates 12 to 16 are accessible by removing the cover 30. Access to the Plates 12 to 16 take place from above, ie from the same side from which the actuating shaft 31 protrudes from the valve housing 20.
  • the throttle plate 15 has to be replaced.
  • the arrangement for actuating the shut-off valve 40 can also be seen.
  • This comprises a first sliding element 41 which is fastened to the actuating shaft 31.
  • the first sliding element 41 is in contact with a second sliding element 42 which is coupled to a valve body of the shut-off valve via a connecting element 45.
  • Both sliding elements 41, 42 are formed by conical bodies.
  • a third conical body 43 serves as part of a coupling device 26 with which a rotary movement of the actuating shaft 31 is transmitted to the actuating device 25.
  • the coupling device 26 essentially consists of a driver 27 which engages in a slot-shaped recess 28.
  • the position shown is the gas valve unit in the fully closed position.
  • the rotational position of the actuating shaft 31 is selected such that the permanent magnet 8 is not located below an open-close valve 3 and thus all the open-close valves 3 are closed.
  • the actuating shaft 31 is not pressed in in the axial direction.
  • the second sliding element 42 is in a left stop position. Due to the shape of the first sliding element 41 as a conical body, an exclusive rotational movement of the actuating shaft 31 and thus of the first sliding element 41 has no influence on the position of the second sliding element 42.
  • the lower end of the actuating shaft 31 is also of a (third) conical shape Body 43 formed.
  • shut-off valve 40 opens and the valve housing 20 fills with gas.
  • FIG. 6 This state of the gas valve unit is in Figure 6 shown.
  • the first sliding element 41 has pushed the second sliding element 42 with the connecting element 45 to the right in the drawing.
  • the connecting element 45 acts directly on the shut-off element 44 of the shut-off valve 40 (see Figure 10 ) so that it is open.
  • the lower area of the gas valve unit in the drawing is filled with gas (see dotted areas).
  • the open-close valves 3 are still closed, so that the flow cross section of the gas valve unit is still zero.
  • FIG. 7 shows a further operating position of the gas valve unit, in which the shut-off valve 40 is opened by pressing in the actuating shaft 31 and, in addition, one of the open-close valves 3 is opened by means of the permanent magnet 8.
  • the shut-off valve 40 is mechanically activated via the first sliding element 41, the second sliding element 42 and the connecting element 45 in Held open.
  • FIG 8 shows Figure 8 an operating position of the gas valve unit in which the shut-off element 44 of the shut-off valve 40 is held in the open position by means of the force of an electromagnet not shown in the present figure.
  • the actuating shaft 32 is here in a non-depressed position, so that the first sliding element 41 does not exert any force on the second sliding element 42.
  • the gas valve unit is in this position during ongoing operation when a flame is burning on the gas burner connected to the gas valve unit.
  • the type of actuation of the shut-off valve 40 is again based on Figures 9, 10 and 11 described in more detail.
  • the first sliding element 41, the second sliding element 42, a connecting element 45 formed by a spring, the shut-off element 44 and a magnet unit 50 can be seen here.
  • the closed rest position of the shut-off valve 40 is ensured by the spring 51 acting on the shut-off body 10.
  • the connecting element 45 is designed as a spring.
  • the spring forming the connecting element 45 is, however, made much stiffer than the spring 51 of the shut-off valve 40.
  • the design of the connecting element 45 as a spring serves in particular to avoid damage to the shut-off valve 40 when the actuating shaft 31 is pressed with excessive force.
  • Figure 12 shows a gas valve unit according to the invention in cross section.
  • the shut-off body 10 the spring 51 and the magnet unit 50 can be seen in particular.
  • the connecting element 45 designed as a spring is suitable for transmitting a compressive force from the second sliding element 42 to the shut-off body 10.
  • the second Sliding element 42 slides on first sliding element 41, which is formed from actuating shaft 31.
  • the third conical element 43 with the coupling device 26, which transmits a rotary movement of the actuating shaft 31 to the permanent magnet 8, is located below the first sliding element 41.
  • the permanent magnet 8 opens the open-close valve 3 located directly above it by means of its magnetic force.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Lift Valve (AREA)

Description

Die Erfindung betrifft eine Gasventileinheit zum Einstellen eines einem Gasbrenner eines , Gasgeräts, insbesondere eines Gaskochgeräts, zugeführten Gasvolumenstroms, wobei die Gasventileinheit ein Ventilgehäuse und eine Betätigungswelle aufweist, welche mit einem Bedienabschnitt aus dem Ventilgehäuse heraussteht, und wobei in dem Ventilgehäuse ein Absperrventil ausgebildet ist.The invention relates to a gas valve unit for setting a gas volume flow supplied to a gas burner of a gas appliance, in particular a gas cooking appliance, the gas valve unit having a valve housing and an actuating shaft which protrudes with an operating section from the valve housing, and wherein a shut-off valve is formed in the valve housing.

Gasventileinheiten dieser Bauart werden häufig auch als gesicherte Gasventile bezeichnet. Die Gasventileinheit besitzt einen veränderlichen Öffnungsquerschnitt, der über die Betätigungswelle eingestellt werden kann. Der Öffnungsquerschnitt kann hierbei stufenlos eingestellt werden. Von dem Öffnungsquerschnitt hängt direkt die Größe des die Gasventileinheit durchströmenden Gasvolumenstroms und damit die Flammengröße an dem Gasbrenner ab. In der Regel kann bei gattungsgemäßen Gasventileinheiten der Öffnungsquerschnitt auf null eingestellt werden, die Gasventileinheit also vollständig geschlossen werden.Gas valve units of this type are often referred to as secured gas valves. The gas valve unit has a variable opening cross-section that can be adjusted via the actuating shaft. The opening cross-section can be adjusted continuously. The size of the gas volume flow flowing through the gas valve unit and thus the size of the flame on the gas burner depends directly on the opening cross section. As a rule, the opening cross-section can be set to zero in generic gas valve units, that is to say the gas valve unit can be completely closed.

Zusätzlich weist die Gasventileinheit ein unabhängig von der Einstellung des Öffnungsquerschnitts betätigbares Absperrventil auf. Das Absperrventil besitzt in der Regel eine offene Schaltstellung und eine geschlossene Schaltstellung, jedoch keine Zwischenstellungen. Bei geschlossenem Absperrventil ist der Gasstrom durch die Gasventileinheit vollständig unterbrochen. Das geöffnete Absperrventil hat hingegen keinen Einfluss auf den Öffnungsquerschnitt der Gasventileinheit. Das Absperrventil dient zum einen dazu, ein vollständiges Schließen der Gasventileinheit redundant sicher zu stellen. Zum anderen ist es möglich, das Absperrventil beispielsweise in Abhängigkeit von dem Signal eines Flammensensors automatisch zu betätigen.In addition, the gas valve unit has a shut-off valve that can be actuated independently of the setting of the opening cross-section. The shut-off valve usually has an open switch position and a closed switch position, but no intermediate positions. When the shut-off valve is closed, the gas flow through the gas valve unit is completely interrupted. The opened shut-off valve, however, has no influence on the opening cross-section of the gas valve unit. The shut-off valve serves, on the one hand, to ensure that the gas valve unit closes completely redundantly. On the other hand, it is possible to operate the shut-off valve automatically, for example as a function of the signal from a flame sensor.

Bekannte Gasventileinheiten der eingangs genannten Art sind in der Regel als Kükenventil ausgeführt. Hier wird der Öffnungsquerschnitt in Abhängigkeit von der Rotationsposition eines in einem Ventilsitz drehbaren Kükens eingestellt. Die Betätigungswelle ist koaxial zu dem Küken angeordnet und mit diesem verbunden. Der Öffnungsquerschnitt der Gasventileinheit wird durch Drehen der Betätigungswelle eingestellt. Das Absperrventil kann durch Drücken derselben Betätigungswelle geöffnet werden.Known gas valve units of the type mentioned at the beginning are usually designed as a plug valve. Here the opening cross-section is set as a function of the rotational position of a plug that can rotate in a valve seat. The actuating shaft is arranged coaxially with the plug and connected to it. The opening cross-section of the gas valve unit is adjusted by turning the actuating shaft set. The shut-off valve can be opened by pressing the same operating shaft.

Gasventileinheiten dieser Bauart besitzen häufig ein ungünstiges Schaltverhalten. Insbesondere lässt sich der Öffnungsquerschnitt häufig nur ungenau und nicht reproduzierbar einstellen.Gas valve units of this type often have an unfavorable switching behavior. In particular, the opening cross section can often only be set imprecisely and not reproducibly.

Die WO 90/12255 beschreibt ein Regelventil mit mehreren Auf-Zu-Ventilen und einer Abschaltvorrichtung.The WO 90/12255 describes a control valve with several on-off valves and a shut-off device.

Die DE 10 2008 027 546 A1 beschreibt eine kombinierte Ventileinrichtung mit einem Auf-Zu-Ventil und einem sogenannten Bipolarventil.The DE 10 2008 027 546 A1 describes a combined valve device with an open-close valve and a so-called bipolar valve.

Die EP 1 672 279 A1 beschreibt ein Gasventil für einen Gasbrenner mit einem drehbaren Ventilküken.The EP 1 672 279 A1 describes a gas valve for a gas burner with a rotatable valve plug.

Die Erfindung ist eine Gasventileinheit nach Anspruch 1.The invention is a gas valve unit according to claim 1.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Gasventileinheit mit verbessertem Schaltverhalten zur Verfügung zu stellen.The present invention is based on the object of providing a generic gas valve unit with improved switching behavior.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass in dem Ventilgehäuse mindestens zwei Auf-Zu-Ventile ausgebildet sind, wobei die Auf-Zu-Ventile durch Drehen der Betätigungswelle betätigbar sind und das Absperrventil durch axiales Verschieben der Betätigungswelle betätigbar ist. Die Auf-Zu-Ventile dienen dazu, den Öffnungsquerschnitt der Gasventileinheit einzustellen, und damit die Größe des die Gasventileinheit durchströmenden Gasvolumenstroms. Dies kann beispielsweise dadurch erfolgen, dass die Auf-Zu-Ventile nacheinander geöffnet und wieder geschlossen werden. Die Ansteuerung der Auf-Zu-Ventile erfolgt durch Drehen der Betätigungswelle. Darüber hinaus weist die Gasventileinheit ein zusätzliches Absperrventil auf, das in geschlossenem Zustand den Gasstrom durch die Ventileinheit vollständig unterbricht. In geöffnetem Zustand weist das Absperrventil einen derart großen Öffnungsquerschnitt auf, dass die Größe des Gasvolumenstroms ausschließlich durch Öffnen und Schließen der Auf-Zu-Ventile festgelegt ist. Das Absperrventil wird durch axiales Bewegen der Betätigungswelle betätigt. Damit können über dieselbe Betätigungswelle sowohl die Auf-Zu-Ventile als auch das Absperrventil betätigt werden.This object is achieved according to the invention in that at least two open-close valves are formed in the valve housing, the open-close valves being operable by rotating the actuating shaft and the shut-off valve being actuated by axially displacing the actuating shaft. The open-close valves serve to set the opening cross-section of the gas valve unit, and thus the size of the gas volume flow flowing through the gas valve unit. This can be done, for example, in that the open-close valves are opened and closed again one after the other. The open-close valves are controlled by turning the actuating shaft. In addition, the gas valve unit has an additional shut-off valve which, in the closed state, completely interrupts the gas flow through the valve unit. In the open state, the shut-off valve has such a large opening cross section that the size of the gas volume flow is determined solely by opening and closing the open-close valves. The shut-off valve is actuated by moving the actuating shaft axially. This means that both the open-close valves and the shut-off valve can be actuated via the same actuating shaft.

Mit besonderem Vorteil sind in dem Ventilgehäuse mindestens zwei Drosselstellen mit jeweils mindestens einer Drosselöffnung ausgebildet, die in Abhängigkeit von der Schaltstellung der Auf-Zu-Ventile mit Gas durchströmbar sind. Bevorzugt ist jedem Auf-Zu-Ventil genau eine Drosselstelle zugeordnet. Bei geöffnetem Auf-Zu-Ventil kann Gas durch diese Drosselstelle strömen, bei geschlossenem Auf-Zu-Ventil kann die diesem Auf-Zu-Ventil zugeordnete Drosselstelle nicht direkt von dem Gaseingang aus mit Gas durchströmt werden, sondern allenfalls über einen Umweg durch andere Drosselstellen.At least two throttle points, each with at least one throttle opening, through which gas can flow depending on the switching position of the open-close valves, are particularly advantageously formed in the valve housing. Preferably, exactly one throttle point is assigned to each open-close valve. When the on-off valve is open, gas can flow through this throttle point; when the on-off valve is closed, the throttle point assigned to this on-off valve cannot be flowed through with gas directly from the gas inlet, but at most via a detour through other throttle points .

Bevorzugt ist das Absperrventil im Bereich eines Gaseingangs der Gasventileinheit angeordnet. Damit steht bei geschlossenem Absperrventil an keinem der Auf-Zu-Ventile und an keiner Drosselstelle Gas an. Sofern sich im Bereich der Auf-Zu-Ventile oder der Drosselstellen Leckstellen befinden sollten, ist ein Ausströmen von Gas aus diesen Leckstellen bei geschlossenem Absperrventil sicher verhindert.The shut-off valve is preferably arranged in the region of a gas inlet of the gas valve unit. When the shut-off valve is closed, there is no gas at any of the open-close valves or at any throttle point. If there are leaks in the area of the open-close valves or the throttle points, gas is reliably prevented from flowing out of these leaks when the shut-off valve is closed.

Bevorzugt weist das Absperrventil ein bewegbares Absperrelement auf. Das Absperrelement kann beispielsweise von einem axial beweglichen Ventilteller gebildet sein, das in geschlossenem Zustand auf einen ringförmigen Ventilsitz drückt.The shut-off valve preferably has a movable shut-off element. The shut-off element can be formed, for example, by an axially movable valve disk which, in the closed state, presses on an annular valve seat.

Das bewegbare Absperrelement des Absperrventils ist in Schließrichtung vorgespannt, insbesondere mittels Federkraft. Hierdurch ist das Absperrventil im Außerbetriebszustand des Gasgeräts immer geschlossen.The movable shut-off element of the shut-off valve is preloaded in the closing direction, in particular by means of spring force. As a result, the shut-off valve is always closed when the gas appliance is inoperative.

Das bewegbare Absperrelement des Absperrventils ist durch Drücken der Betätigungswelle entgegen der Vorspannung in eine Offenstellung bewegbar. Die Drückbewegung der Betätigungswelle wird dabei direkt oder indirekt auf das Absperrelement übertragen. In Offenstellung ist das Absperrelement von dem Ventilsitz des Absperrventils abgehoben und gibt dadurch den Gasweg von dem Gaseingang des Ventilgehäuses in Richtung zu den Auf-Zu-Ventilen frei.The movable shut-off element of the shut-off valve can be moved into an open position by pressing the actuating shaft against the bias. The pushing movement of the actuating shaft is transmitted directly or indirectly to the shut-off element. In the open position, the shut-off element is lifted from the valve seat of the shut-off valve, thereby releasing the gas path from the gas inlet of the valve housing in the direction of the open-close valves.

Weiter ist das bewegbare Absperrelement des Absperrventils mittels der Kraft einer Magnetspule entgegen der Federkraft in Offenstellung haltbar. Das Absperrventil weist eine Magnetspule auf, mit der ebenfalls eine in Öffnungsrichtung wirkende Kraft auf das Absperrelement ausgeübt werden kann. Die Magnetspule kann dabei beispielsweise von einem Thermoelement oder von einer elektronischen Steuerung mit Spannung beaufschlagt sein. Die Magnetspule ist dabei derart ausgelegt, dass das bereits in Offenstellung befindliche Absperrelement mittels der Kraft der Magnetspule in dieser Position gehalten werden kann. Hingegen ist es nicht möglich, mittels der Kraft der Magnetspule das Absperrelement von einer geschlossenen Stellung in die Offenstellung zu bewegen. Die Magnetspule ist derart an einen Flammensensor im Bereich eines Gasbrenners gekoppelt, dass das Absperrventil dann offengehalten wird, wenn an dem Gasbrenner eine Gasflamme brennt. Nach einem Erlöschen der Gasflamme ist die Stromzufuhr zu der Magnetspule unterbrochen und das Absperrventil schließt selbsttätig mittels Federkraft.Furthermore, the movable shut-off element of the shut-off valve can be held in the open position counter to the spring force by means of the force of a magnetic coil. The shut-off valve has a magnetic coil with which a force acting in the opening direction can also be exerted on the shut-off element. The magnetic coil can have voltage applied to it, for example, from a thermocouple or from an electronic controller. The magnetic coil is designed in such a way that the shut-off element, which is already in the open position, can be held in this position by means of the force of the magnetic coil. On the other hand, it is not possible to move the shut-off element from a closed position into the open position by means of the force of the magnetic coil. The magnetic coil is coupled to a flame sensor in the area of a gas burner in such a way that the shut-off valve is kept open when a gas flame is burning on the gas burner. After the gas flame has gone out, the Power supply to the solenoid is interrupted and the shut-off valve closes automatically by means of spring force.

Gemäß der Erfindung ist eine Umlenkvorrichtung vorgesehen, die eine axiale Bewegung der Betätigungswelle in eine dazu im Wesentlichen rechtwinkelige axiale Bewegung des Absperrelements des Absperrventils überträgt. Die Bewegungsrichtung des Absperrelements ist dabei senkrecht zu der axialen Betätigungsrichtung der Betätigungswelle. Eine derartige Bauweise der Gasventileinheit wird gewählt, um die Abmessung des Gehäuses der Gasventileinheit in axialer Richtung der Betätigungswelle zu minimieren.According to the invention, a deflection device is provided which converts an axial movement of the actuating shaft into an axial movement of the shut-off element of the shut-off valve that is substantially perpendicular thereto. The direction of movement of the shut-off element is perpendicular to the axial actuation direction of the actuation shaft. Such a construction of the gas valve unit is selected in order to minimize the dimensions of the housing of the gas valve unit in the axial direction of the actuating shaft.

Die Umlenkvorrichtung weist bevorzugt ein erstes Gleitelement auf, das an der Betätigungswelle im Bereich des dem Bedienabschnitt entgegengesetzten Endes der Betätigungswelle angeordnet ist. Das erste Gleitelement wird bei einer axialen Bewegung der Betätigungswelle mit dieser mitbewegt. Das erste Gleitelement und die Betätigungswelle können beispielsweise einteilig ausgeführt sein.The deflecting device preferably has a first sliding element which is arranged on the actuating shaft in the region of the end of the actuating shaft opposite the operating section. When the actuating shaft moves axially, the first sliding element is moved along with it. The first sliding element and the actuating shaft can, for example, be made in one piece.

Bevorzugt ist das erste Gleitelement als erstes kegelförmiges Element ausgeführt, derart, dass eine Spitze des ersten kegelförmigen Elements von dem Bedienabschnitt der Betätigungswelle weg weist. Bei einem Drücken der Betätigungswelle bewegt sich das erste kegelförmige Element in Richtung seiner Spitze. Bei einem Drehen der Betätigungswelle ändert sich hingegen die räumliche Lage des ersten kegelförmigen Elements nicht, da es dabei um seine Symmetrieachse gedreht wird.The first sliding element is preferably designed as a first conical element in such a way that a tip of the first conical element points away from the operating section of the actuating shaft. When the actuating shaft is pressed, the first conical element moves in the direction of its tip. When the actuating shaft is rotated, however, the spatial position of the first conical element does not change because it is rotated about its axis of symmetry.

Bevorzugt weist die Umlenkvorrichtung ein zweites Gleitelement auf, das sich zumindest während eines Drückens der Betätigungswelle in Kontakt mit dem ersten Gleitelement befindet. Hierbei gleitet das zweite Gleitelement auf dem ersten Gleitelement ab.The deflecting device preferably has a second sliding element, which is in contact with the first sliding element at least while the actuating shaft is being pressed. The second sliding element slides on the first sliding element.

Bevorzugt ist das zweite Gleitelement als zweites kegelförmiges Element ausgebildet, dessen Mittelachse im Wesentlichen senkrecht zu der Betätigungswelle angeordnet ist und dessen Spitze in Richtung des ersten Gleitelements weist. Die Ausbildung des zweiten Gleitelements als zweites kegelförmiges Element hat den Vorteil, dass die Rotationsposition des zweiten kegelförmigen Elements bezüglich seiner Symmetrieachse keine Auswirkungen auf die Funktionsweise der Umlenkvorrichtung hat.The second sliding element is preferably designed as a second conical element, the central axis of which is arranged essentially perpendicular to the actuating shaft and the tip of which points in the direction of the first sliding element. The design of the second sliding element as a second conical element has the advantage that the rotational position of the second conical element with respect to its axis of symmetry has no effect on the functioning of the deflection device.

Das erste Gleitelement und das zweite Gleitelement sind derart ausgebildet und angeordnet, dass ein axiales Verschieben der Betätigungswelle in Folge eines Drückens auf den Bedienabschnitt in ein axiales Verschieben des zweiten Gleitelements in Richtung von der Betätigungswelle weg umgesetzt wird.The first sliding element and the second sliding element are designed and arranged in such a way that an axial displacement of the actuating shaft as a result of pressing on the operating section is converted into an axial displacement of the second sliding element in the direction away from the actuating shaft.

Weiter steht das zweite Gleitelement derart mit dem Absperrelement des Absperrventils in Wirkverbindung, dass eine axiale Bewegung des zweiten Gleitelements in Richtung von der Betätigungswelle weg auf das Absperrelement übertragen wird. Bei einem Drücken der Betätigungswelle wird damit das Absperrelement des Absperrventils von seinem Ventilsitz abgehoben und dadurch das Absperrventil geöffnet.Furthermore, the second sliding element is in operative connection with the shut-off element of the shut-off valve in such a way that an axial movement of the second sliding element in the direction away from the actuating shaft is transmitted to the shut-off element. When the actuating shaft is pressed, the shut-off element of the shut-off valve is lifted from its valve seat and the shut-off valve is thereby opened.

Weiter ist in der Gasventileinheit eine Betätigungsvorrichtung für die Auf-Zu-Ventile vorgesehen, welche mittels einer Koppelvorrichtung an einem innerhalb des Ventilgehäuses befindlichen Ende der Betätigungswelle an die Betätigungswelle gekoppelt ist. Die Betätigungsvorrichtung umfasst beispielsweise einen Permanentmagnet, welcher relativ zu den Auf-Zu-Ventilen bewegt werden kann. Eine Rotationsbewegung der Betätigungswelle wird mittels der Koppelvorrichtung auf die Betätigungsvorrichtung für die Auf-Zu-Ventile übertragen.Furthermore, an actuating device for the on-off valves is provided in the gas valve unit, which actuating device is coupled to the actuating shaft by means of a coupling device at an end of the actuating shaft located inside the valve housing. The actuating device comprises, for example, a permanent magnet which can be moved relative to the open-close valves. A rotational movement of the actuating shaft is transmitted to the actuating device for the on-off valves by means of the coupling device.

Hierbei ist die Koppelvorrichtung derart ausgeführt, dass die Betätigungsvorrichtung drehstarr an die Betätigungswelle gekoppelt ist.The coupling device is designed in such a way that the actuating device is coupled to the actuating shaft in a rotationally rigid manner.

Weiter ist die Koppelvorrichtung derart ausgeführt, dass ein axiales Verschieben der Betätigungswelle nicht auf die Betätigungsvorrichtung übertragen wird.Furthermore, the coupling device is designed in such a way that an axial displacement of the actuating shaft is not transmitted to the actuating device.

Die Koppelvorrichtung weist hierzu eine schlitzförmige Ausnehmung an einer Stirnseite des dem Bedienabschnitt entgegengesetzten Endes der Betätigungswelle auf.For this purpose, the coupling device has a slot-shaped recess on an end face of the end of the actuating shaft opposite the operating section.

Weiter umfasst die Koppelvorrichtung einen flachen Mitnehmer, welcher in die schlitzförmige Ausnehmung eingreift. Der in die schlitzförmige Ausnehmung eingreifende flache Mitnehmer erlaubt die Übertragung eines Drehmoments von der Betätigungswelle auf die Betätigungsvorrichtung der Auf-Zu-Ventile. Der Ausgleich einer axialen Bewegung der Betätigungswelle erfolgt dadurch, dass der flache Mitnehmer mehr oder weniger weit in die schlitzförmige Ausnehmung eingesteckt ist.The coupling device further comprises a flat driver which engages in the slot-shaped recess. The flat driver engaging in the slot-shaped recess allows the transmission of a torque from the actuating shaft to the actuating device of the open-close valves. Compensating for an axial movement the actuating shaft takes place in that the flat driver is inserted more or less far into the slot-shaped recess.

Mit besonderem Vorteil ist die Ausnehmung in einer Basis eines dritten kegelförmigen Elements angeordnet, das an der Betätigungswelle im Bereich des dem Bedienabschnitt entgegengesetzten Endes der Betätigungswelle ausgebildet ist, derart, dass eine Spitze des dritten kegelförmigen Elements in Richtung des Bedienabschnitts der Betätigungswelle weist und mit einer Spitze des ersten kegelförmigen Elements verbunden ist. Die Ausbildung des Endes der Betätigungswelle als kegelförmiges Element hat den Vorteil, dass sich die räumliche Ausdehnung eines kegelförmigen Elements bei einer Drehung der Betätigungswelle nicht verändert. Es besteht damit keine Gefahr einer unbeabsichtigten Bewegung des zweiten Gleitelements dadurch, dass es mit dem dritten kegelförmigen Element versehentlich in Kontakt tritt.With particular advantage, the recess is arranged in a base of a third conical element which is formed on the actuating shaft in the area of the end of the actuating shaft opposite the operating section, in such a way that a tip of the third conical element points in the direction of the operating section of the actuating shaft and with a Tip of the first conical element is connected. The design of the end of the actuating shaft as a conical element has the advantage that the spatial extent of a conical element does not change when the actuating shaft is rotated. There is thus no risk of inadvertent movement of the second sliding element as a result of it inadvertently coming into contact with the third conical element.

Weitere Vorteile und Einzelheiten der Erfindung werden anhand des in den schematischen Figuren dargestellten Ausführungsbeispiels näher erläutert. Dabei zeigt

Figur 1
eine schematische Schaltanordnung der Auf-Zu-Ventile und der Drosselstellen mit einem ersten geöffneten Auf-Zu-Ventil,
Figur 2
die schematische Schaltanordnung mit zwei geöffneten Auf-Zu-Ventilen,
Figur 3
die schematische Schaltanordnung mit dem letzten geöffneten Auf-Zu-Ventil,
Figur 4
einen schematischen Aufbau einer Gasventilanordnung mit geschlossenen Auf-Zu-Ventilen,
Figur 5
den schematischen Aufbau der erfindungsgemäßen Gasventileinheit in geschlossenem Zustand,
Figur 6
die Gasventileinheit bei geöffnetem Absperrventil,
Figur 7
die Gasventileinheit bei geöffnetem Absperrventil und geöffnetem Auf-Zu-Ventil,
Figur 8
die geöffnete Gasventileinheit mit nicht gedrückter Betätigungswelle,
Figur 9
das Absperrventil in geschlossenem Zustand,
Figur 10
das geöffnete Absperrventil,
Figur 11
das geöffnete Absperrventil mit weit gedrückter Betätigungswelle,
Figur 12
die Gasventileinheit in einer Schnittdarstellung.
Further advantages and details of the invention are explained in more detail with reference to the exemplary embodiment shown in the schematic figures. It shows
Figure 1
a schematic circuit arrangement of the on-off valves and the throttle points with a first open on-off valve,
Figure 2
the schematic switching arrangement with two open on-off valves,
Figure 3
the schematic circuit arrangement with the last open on-off valve,
Figure 4
a schematic structure of a gas valve arrangement with closed open-close valves,
Figure 5
the schematic structure of the gas valve unit according to the invention in the closed state,
Figure 6
the gas valve unit with the shut-off valve open,
Figure 7
the gas valve unit with the shut-off valve and open-close valve open,
Figure 8
the open gas valve unit with the actuating shaft not pressed,
Figure 9
the shut-off valve in the closed state,
Figure 10
the open shut-off valve,
Figure 11
the open shut-off valve with the actuating shaft pushed far,
Figure 12
the gas valve unit in a sectional view.

Die Figuren 1 bis 3 zeigen die Schaltanordnung der Auf-Zu-Ventile 3 (3.1 bis 3.5) und der Drosselstellen 4 (4.1 bis 4.5) der Gasventileinheit. Das erfindungsgemäße Absperrventil ist hier jedoch nicht dargestellt.The Figures 1 to 3 show the switching arrangement of the on-off valves 3 (3.1 to 3.5) and the throttle points 4 (4.1 to 4.5) of the gas valve unit. The shut-off valve according to the invention is not shown here, however.

Zu erkennen ist ein Gaseingang 1, mit dem die Gasventileinheit beispielsweise an eine Hauptgasleitung eines Gaskochgeräts angeschlossen ist. An dem Gaseingang 1 steht das zur Verbrennung vorgesehene Gas mit einem konstanten Druck von beispielsweise 20 Millibar oder 50 Millibar an. An einen Gasausgang 2 der Gasventileinheit wird eine beispielsweise zu einem Gasbrenner des Gaskochgeräts führende Gasleitung angeschlossen. Der Gaseingang 1 ist über einen Gaseingangsraum 9 der Gasventileinheit mit der Eingangsseite der im vorliegenden Ausführungsbeispiel fünf Auf-Zu-Ventile 3 (3.1 bis 3.5) verbunden. Durch Öffnen der Auf-Zu-Ventile 3 ist der Gaseingang 1 jeweils mit einem bestimmten Abschnitt einer Drosselstrecke 5 verbunden, in den das Gas über das geöffnete Auf-Zu-Ventil 3 einströmt. Die Drosselstrecke 5 umfasst einen Eingangsabschnitt 7, in den das erste Auf-Zu-Ventil 3.1 mündet. Die weiteren Auf-Zu-Ventile 3.2 bis 3.5 münden jeweils in einen Verbindungsabschnitt 6 (6.1 bis 6.4) der Drosselstrecke 5. Der Übergang zwischen dem Eingangsabschnitt 7 und dem ersten Verbindungsabschnitt 6.1, sowie die Übergänge zwischen zwei benachbarten der Verbindungsabschnitte 6.1 bis 6.4 sind jeweils von einer Drosselstelle 4 (4.1 bis 4.5) gebildet. Die letzte Drosselstelle 4.5 verbindet den letzten Verbindungsabschnitt 6.4 mit dem Gasausgang 2. Die Drosselstellen 4.1 bis 4.5 besitzen einen der Reihe nach zunehmendem Öffnungsquerschnitt. Der Durchflussquerschnitt der letzten Drosselstelle 4.5 kann so groß gewählt sein, dass die letzte Drosselstelle 4.5 praktisch keine Drosselfunktion besitzt.A gas inlet 1 can be seen with which the gas valve unit is connected, for example, to a main gas line of a gas cooking appliance. At the gas inlet 1, the gas provided for combustion is present at a constant pressure of, for example, 20 millibars or 50 millibars. A gas line leading, for example, to a gas burner of the gas cooking appliance is connected to a gas outlet 2 of the gas valve unit. The gas inlet 1 is connected to the inlet side of the five open-close valves 3 (3.1 to 3.5) in the present exemplary embodiment via a gas inlet space 9 of the gas valve unit. By opening the open-close valves 3, the gas inlet 1 is connected to a specific section of a throttle section 5 into which the gas flows through the open open-close valve 3. The throttle section 5 comprises an input section 7 into which the first open-close valve 3.1 opens. The further open-close valves 3.2 to 3.5 each open into a connecting section 6 (6.1 to 6.4) of the throttle section 5. The transition between the input section 7 and the first connecting section 6.1, as well as the transitions between two adjacent connecting sections 6.1 to 6.4 are each formed by a throttle point 4 (4.1 to 4.5). The last throttle point 4.5 connects the last connection section 6.4 with the gas outlet 2. The throttle points 4.1 to 4.5 have an opening cross-section that increases in sequence. The flow cross-section of the last throttle point 4.5 can be selected to be so large that the last throttle point 4.5 has practically no throttle function.

Die Betätigung der Auf-Zu-Ventile 3 erfolgt mittels eines Permanentmagnets 8, der entlang der Reihe der Auf-Zu-Ventile 3 verschiebbar ist. Die Kraft zum Öffnen des jeweiligen Auf-Zu-Ventils 3 wird dabei direkt von der Magnetkraft des Permanentmagnets 8 gebildet. Diese Magnetkraft öffnet das jeweilige Auf-Zu-Ventil 3 entgegen einer Federkraft.The open-close valves 3 are actuated by means of a permanent magnet 8, which is displaceable along the row of open-close valves 3. The force for opening the respective open-close valve 3 is generated directly from the magnetic force of the permanent magnet 8. This magnetic force opens the respective open-close valve 3 against a spring force.

In der Schaltstellung gemäß Figur 1 ist ausschließlich das erste Auf-Zu-Ventil 3.1 geöffnet. Durch dieses Auf-Zu-Ventil 3.1 strömt das Gas von dem Gaseingangsraum 9 in den Eingangsabschnitt 7 und passiert von dort aus auf dem Weg zum Gasausgang 2 sämtliche Drosselstellen 4 und sämtliche Verbindungsabschnitte 6. Die Menge des durch die Ventileinheit strömenden Gases gibt die Minimalleistung des an die Gasventileinheit angeschlossenen Gasbrenners vor.In the switch position according to Figure 1 only the first open-close valve 3.1 is open. The gas flows through this open-close valve 3.1 from the gas inlet space 9 into the inlet section 7 and from there passes all throttle points 4 and all connecting sections 6 on the way to the gas outlet 2. The amount of gas flowing through the valve unit gives the minimum output of the connected to the gas valve unit.

Figur 2 zeigt die schematische Schaltanordnung, bei der der Permanentmagnet 8 derart nach in der Zeichnung rechts verschoben ist, dass sowohl das erste Auf-Zu-Ventil 3.1 als auch das zweite Auf-Zu-Ventil 3.2 geöffnet sind. Figure 2 shows the schematic switching arrangement in which the permanent magnet 8 is shifted to the right in the drawing in such a way that both the first open-close valve 3.1 and the second open-close valve 3.2 are open.

Durch das geöffnete zweite Auf-Zu-Ventil 3.2 strömt das Gas von dem Gaseingangsraum 9 direkt in den ersten Verbindungsabschnitt 6.1 und von dort über die Drosselstellen 4.2 bis 4.5 zum Gasausgang 2. Das zum Gasausgang 2 strömende Gas umgeht aufgrund des geöffneten Auf-Zu-Ventils 3.2 die erste Drosselstelle 4.1. Der Gasvolumenstrom in der Schaltstellung gemäß Figur 2 ist deshalb größer als der Gasvolumenstrom in der Schaltstellung gemäß Figur 1. Der Gaszufluss zu dem ersten Verbindungsabschnitt 6.1 erfolgt praktisch ausschließlich über das zweite Auf-Zu-Ventil 3.2. Aufgrund der offen stehenden Auf-Zu-Ventile 3.1 und 3.2 herrscht in dem Eingangsabschnitt 7 dasselbe Druckniveau wie in dem ersten Verbindungsabschnitt 6.1. Aus dem Eingangsabschnitt 7 strömt über die erste Drosselstelle 4.1 deshalb so gut wie kein Gas in den ersten Verbindungsabschnitt 6.1 nach. Der insgesamt durch die Gasventileinheit strömende Gasvolumenstrom ändert sich daher praktisch nicht, wenn der Permanentmagnet 8 weiter nach in der Zeichnung rechts bewegt wird und dadurch das erste Auf-Zu-Ventil 3.1 bei geöffnetem zweiten Auf-Zu-Ventil 3.2 geschlossen wird.The gas flows through the opened second open-close valve 3.2 from the gas inlet space 9 directly into the first connection section 6.1 and from there via the throttle points 4.2 to 4.5 to the gas outlet 2. The gas flowing to the gas outlet 2 bypasses the open open-close Valve 3.2, the first throttle point 4.1. The gas volume flow in the switch position according to Figure 2 is therefore greater than the gas volume flow in the switch position according to Figure 1 . The gas flow to the first connection section 6.1 takes place practically exclusively via the second open-close valve 3.2. Because of the open on-off valves 3.1 and 3.2, the same pressure level prevails in the inlet section 7 as in the first connecting section 6.1. Virtually no gas therefore flows from the inlet section 7 via the first throttle point 4.1 into the first connecting section 6.1. The total gas volume flow flowing through the gas valve unit therefore practically does not change when the permanent magnet 8 continues is moved to the right in the drawing and thereby the first open-close valve 3.1 is closed when the second open-close valve 3.2 is open.

Durch Bewegen des Permanentmagnets 8 nach in der Zeichnung rechts werden die Auf-Zu-Ventile 3.3. bis 3.5 sukzessive geöffnet und dadurch der Gasvolumenstrom durch die Gasventileinheit schrittweise erhöht.By moving the permanent magnet 8 to the right in the drawing, the open-close valves 3.3. to 3.5 successively opened and thereby the gas volume flow through the gas valve unit is gradually increased.

Figur 3 zeigt die schematische Schaltanordnung der Gasventileinheit in maximal geöffneter Stellung. Hierbei befindet sich der Permanentmagnet 8 in seiner Endstellung auf der in der Zeichnung rechten Seite. Das letzte Auf-Zu-Ventil 3.5 ist bei dieser Position des Permanentmagnets 8 geöffnet. Gas strömt hierbei direkt aus dem Gaseingangsraum 9 in den letzten Verbindungsabschnitt 6.4 und passiert auf dem Weg zum Gasausgang 2 ausschließlich die letzte Drosselstelle 4.5. Diese letzte Drosselstelle 4.5 kann einen derart großen Durchflussquerschnitt aufweisen, dass praktisch keine Drosselung des Gasstroms eintritt und das Gas die Gasventileinheit praktisch ungedrosselt durchströmen kann. Figure 3 shows the schematic circuit arrangement of the gas valve unit in the fully open position. Here, the permanent magnet 8 is in its end position on the right-hand side in the drawing. The last open-close valve 3.5 is open in this position of the permanent magnet 8. In this case, gas flows directly from the gas inlet space 9 into the last connecting section 6.4 and only passes through the last throttle point 4.5 on the way to the gas outlet 2. This last throttle point 4.5 can have such a large flow cross-section that practically no throttling of the gas flow occurs and the gas can flow through the gas valve unit in a practically unthrottled manner.

Figur 4 zeigt schematisch einen konstruktiven Aufbau einer Gasventileinheit mit einer Schaltanordnung gemäß Figur 1 bis 3. Das erfindungsgemäße Absperrventil ist hier ebenfalls nicht dargestellt. Figure 4 shows schematically a structural design of a gas valve unit with a switching arrangement according to Figure 1 to 3 . The shut-off valve according to the invention is also not shown here.

Zu erkennen ist in Figur 4 ein Ventilkörper 20, in dem der Gaseingang 1 der Gasventileinheit ausgeführt ist. Im Inneren des Ventilkörpers 20 befindet sich ein mit dem Gaseingang 1 verbundener Gaseingangsraum 9. Absperrkörper 10 der Auf-Zu-Ventile 3 sind in dem Ventilkörper 20 geführt, derart, dass sie sich in der Zeichnung nach oben und unten bewegen können. Jeder Absperrkörper 10 ist mittels einer Feder 11 nach in der Zeichnung unten vorgespannt. Mittels der Kraft des Permanentmagnets 8 kann jeder Absperrkörper 10 entgegen der Kraft der Feder 11 nach in der Zeichnung oben bewegt werden. Die Federn 11 drücken die Absperrkörper auf eine Ventildichtplatte 12, so dass die Absperrkörper 10 in der Ventildichtplatte 12 vorhandene Öffnungen 12a gasdicht verschließen. Unterhalb der Ventildichtplatte 12 ist eine Druckplatte 13 angeordnet, mit Öffnungen 13a, die mit den Öffnungen 12a in der Ventildichtplatte 12 korrespondieren. Die Öffnungen 13a in der Druckplatte 13 münden in Öffnungen 14a in eine erste Gasverteilungsplatte 14. In der Zeichnung unterhalb der ersten Gasverteilungsplatte 14 befindet sich eine Drosselplatte 15 mit einer Vielzahl von Drosselöffnungen 18. Jede der Drosselstellen 4.1 bis 4.4 wird dabei von zwei Drosselöffnungen 18 gebildet. Die zwei zu einer Drosselstelle 4.1 bis 4.4 gehörenden Drosselöffnungen 18 sind jeweils mittels der Öffnungen 16a in einer zweiten Gasverteilungsplatte 16 miteinander verbunden. Die Öffnungen 14a in der ersten Gasverteilungsplatte verbinden hingegen die nebeneinander liegenden Drosselöffnungen 18 zweier benachbarter Drosselstellen 4.1 bis 4.5. Die letzte Drosselstelle 4.5 besteht aus nur einer Drosselöffnung 18, welche über eine korrespondierende Öffnung 16a in der zweiten Gasverteilungsplatte 16 in den Gasausgang 2 der Gasventileinheit mündet.You can see in Figure 4 a valve body 20 in which the gas inlet 1 of the gas valve unit is implemented. Inside the valve body 20 is a gas inlet chamber 9 connected to the gas inlet 1. Shut-off bodies 10 of the open-close valves 3 are guided in the valve body 20 so that they can move up and down in the drawing. Each shut-off body 10 is pretensioned by means of a spring 11 downward in the drawing. By means of the force of the permanent magnet 8, each shut-off body 10 can be moved against the force of the spring 11 towards the top in the drawing. The springs 11 press the shut-off bodies onto a valve sealing plate 12, so that the shut-off bodies 10 close openings 12a present in the valve sealing plate 12 in a gas-tight manner. A pressure plate 13 is arranged below the valve sealing plate 12, with openings 13 a which correspond to the openings 12 a in the valve sealing plate 12. The openings 13a in the pressure plate 13 open into openings 14a in a first gas distribution plate 14. In the drawing below the first gas distribution plate 14 there is a throttle plate 15 with a plurality of throttle openings 18. Each of the Throttle points 4.1 to 4.4 are formed by two throttle openings 18. The two throttle openings 18 belonging to a throttle point 4.1 to 4.4 are each connected to one another by means of the openings 16 a in a second gas distribution plate 16. The openings 14a in the first gas distribution plate, on the other hand, connect the throttle openings 18 lying next to one another in two adjacent throttle points 4.1 to 4.5. The last throttle point 4.5 consists of only one throttle opening 18, which opens into the gas outlet 2 of the gas valve unit via a corresponding opening 16a in the second gas distribution plate 16.

Bei der Schaltstellung gemäß Figur 4 befindet sich der Permanentmagnet 8 in einer Endposition, in der alle Auf-Zu-Ventile 3 geschlossen sind. Die Gasventileinheit ist damit insgesamt geschlossen. Der Gasvolumenstrom ist gleich null. Ausgehend von dieser Schaltstellung wird der Permanentmagnet 8 nach in der Zeichnung rechts bewegt, wodurch jeweils die unter dem Permanentmagnet 8 angeordneten Auf-Zu-Ventile 3 geöffnet werden.With the switch position according to Figure 4 the permanent magnet 8 is in an end position in which all open-close valves 3 are closed. The gas valve unit is thus closed as a whole. The gas volume flow is zero. Starting from this switching position, the permanent magnet 8 is moved to the right in the drawing, whereby the on-off valves 3 arranged below the permanent magnet 8 are opened.

Figur 5 zeigt den schematischen Aufbau der erfindungsgemäßen Gasventilanordnung. Zu erkennen ist das im Wesentlichen rotationssymmetrische Ventilgehäuse 20 mit einer zentral angeordneten Betätigungswelle 31. Die beispielsweise fünf Auf-Zu-Ventile 3 sind entlang eines Kreisbogens um die Betätigungswelle 31 angeordnet. An dem oberen Ende der Betätigungswelle 31 befindet sich deren Bedienabschnitt 29, auf den beispielsweise ein Drehknebel aufgesteckt werden kann. An dem unteren Ende der Betätigungswelle 31 ist eine Betätigungsvorrichtung 25 angeordnet, an deren äußerem Ende der Permanentmagnet 8 angeordnet ist. Bei einem Drehen der Bestätigungswelle 31 bewegt sich der Permanentmagnet 8 entlang eines Kreisbogens an den Auf-Zu-Ventilen 3 vorbei. Jeweils genau die Auf-Zu-Ventile 3, die sich direkt über dem Permanentmagnet 8 befinden, werden durch die Magnetkraft des Permanentmagnets 8 geöffnet. Oben auf die Betätigungswelle 31 kann beispielsweise ein von der Bedienperson direkt greifbarer Drehknebel aufgesteckt sein. Figure 5 shows the schematic structure of the gas valve arrangement according to the invention. The essentially rotationally symmetrical valve housing 20 with a centrally arranged actuating shaft 31 can be seen. The five open-close valves 3, for example, are arranged along a circular arc around the actuating shaft 31. At the upper end of the actuating shaft 31 is its operating section 29, onto which, for example, a rotary knob can be attached. At the lower end of the actuating shaft 31, an actuating device 25 is arranged, at the outer end of which the permanent magnet 8 is arranged. When the confirmation shaft 31 is rotated, the permanent magnet 8 moves past the open-close valves 3 along an arc. Exactly the open-close valves 3, which are located directly above the permanent magnet 8, are opened by the magnetic force of the permanent magnet 8. On top of the actuating shaft 31, for example, a rotary toggle that can be directly grasped by the operator can be attached.

An der Oberseite des Ventilkörpers ist eine Abdeckung 30 ausgebildet, in der, von unten nach oben, die Ventildichtplatte 12, die Druckplatte 13, die erste Gasverteilungsplatte 14, die Drosselplatte 15 und die zweite Gasverteilungsplatte 16 angeordnet sind. Die Platten 12 bis 16 sind durch Abnehmen der Abdeckung 30 zugänglich. Der Zugang zu den Platten 12 bis 16 erfolgt von oben, d. h. von derselben Seite, aus der die Betätigungswelle 31 aus dem Ventilgehäuse 20 ragt.A cover 30 is formed on the upper side of the valve body in which, from bottom to top, the valve sealing plate 12, the pressure plate 13, the first gas distribution plate 14, the throttle plate 15 and the second gas distribution plate 16 are arranged. The plates 12 to 16 are accessible by removing the cover 30. Access to the Plates 12 to 16 take place from above, ie from the same side from which the actuating shaft 31 protrudes from the valve housing 20.

Zur Anpassung der Gasventileinheit an eine andere Gasart ist insbesondere die Drosselplatte 15 auszutauschen. In der Drosselplatte 15 befinden sich die Drosselöffnungen 18, welche die Größe des Gasvolumenstroms maßgeblich festlegen. Nach einem Abnehmen der Abdeckung nach oben befinden sich alle Platten 12 bis 16 in der Abdeckung 30.To adapt the gas valve unit to a different type of gas, in particular the throttle plate 15 has to be replaced. In the throttle plate 15 are the throttle openings 18, which determine the size of the gas volume flow. After the cover has been removed in an upward direction, all of the panels 12 to 16 are located in the cover 30.

Zu erkennen ist weiter die Anordnung zur Betätigung des in dieser Abbildung nicht dargestellten Absperrventils 40. Diese umfasst ein erstes Gleitelement 41, das an der Betätigungswelle 31 befestigt ist. Das erste Gleitelement 41 steht in Kontakt mit einem zweiten Gleitelement 42, das über ein Verbindungselement 45 an einen Ventilkörper des Absperrventils gekoppelt ist. Beide Gleitelemente 41, 42 sind von kegelförmigen Körpern gebildet. Ein dritter kegelförmiger Körper 43 dient als Teil einer Koppelvorrichtung 26, mit welcher eine Drehbewegung der Betätigungswelle 31 auf die Betätigungsvorrichtung 25 übertragen wird. Die Koppelvorrichtung 26 besteht im Wesentlichen aus einem Mitnehmer 27, der in eine schlitzförmige Ausnehmung 28 eingreift.The arrangement for actuating the shut-off valve 40, not shown in this figure, can also be seen. This comprises a first sliding element 41 which is fastened to the actuating shaft 31. The first sliding element 41 is in contact with a second sliding element 42 which is coupled to a valve body of the shut-off valve via a connecting element 45. Both sliding elements 41, 42 are formed by conical bodies. A third conical body 43 serves as part of a coupling device 26 with which a rotary movement of the actuating shaft 31 is transmitted to the actuating device 25. The coupling device 26 essentially consists of a driver 27 which engages in a slot-shaped recess 28.

In der in Figur 5 dargestellten Position befindet sich die Gasventileinheit in vollständig geschlossener Stellung. Die Rotationsposition der Betätigungswelle 31 ist derart gewählt, dass sich der Permanentmagnet 8 nicht unterhalb eines Auf-Zu-Ventils 3 befindet und damit alle Auf-Zu-Ventile 3 geschlossen sind. Darüber hinaus ist die Betätigungswelle 31 auch nicht in axialer Richtung eingedrückt. Das zweite Gleitelement 42 befindet sich in einer linken Anschlagposition. Aufgrund der Formgebung des ersten Gleitelements 41 als kegelförmiger Körper hat eine ausschließliche Drehbewegung der Betätigungswelle 31 und damit des ersten Gleitelements 41 keinen Einfluss auf die Position des zweiten Gleitelements 42. Aus demselben Grund ist das untere Ende der Betätigungswelle 31 ebenfalls von einem (dritten) kegelförmigen Körper 43 gebildet.In the in Figure 5 The position shown is the gas valve unit in the fully closed position. The rotational position of the actuating shaft 31 is selected such that the permanent magnet 8 is not located below an open-close valve 3 and thus all the open-close valves 3 are closed. In addition, the actuating shaft 31 is not pressed in in the axial direction. The second sliding element 42 is in a left stop position. Due to the shape of the first sliding element 41 as a conical body, an exclusive rotational movement of the actuating shaft 31 and thus of the first sliding element 41 has no influence on the position of the second sliding element 42. For the same reason, the lower end of the actuating shaft 31 is also of a (third) conical shape Body 43 formed.

In der Schaltposition gemäß Figur 5 befindet sich im Ventilgehäuse 20 der Gasventileinheit aufgrund des geschlossenen Absperrventils 40 kein Gas.In the switching position according to Figure 5 there is no gas in the valve housing 20 of the gas valve unit due to the closed shut-off valve 40.

Wenn nun die Schaltwelle 31 in axialer Richtung nach unten eingedrückt wird, öffnet sich das Absperrventil 40 und das Ventilgehäuse 20 füllt sich mit Gas.If the control shaft 31 is now pressed in downwards in the axial direction, the shut-off valve 40 opens and the valve housing 20 fills with gas.

Dieser Zustand der Gasventileinheit ist in Figur 6 dargestellt. Hierbei hat das erste Gleitelement 41 das zweite Gleitelement 42 mit dem Verbindungselement 45 nach in der Zeichnung rechts gedrückt. Das Verbindungselement 45 wirkt direkt auf das Absperrelement 44 des Absperrventils 40 (siehe Figur 10), so dass dieses geöffnet ist. Der in der Zeichnung untere Bereich der Gasventileinheit ist dadurch mit Gas gefüllt (siehe gepunktete Flächen). Hingegen sind die Auf-Zu-Ventile 3 weiterhin geschlossen, so dass der Durchflussquerschnitt der Gasventileinheit weiterhin gleich Null ist.This state of the gas valve unit is in Figure 6 shown. Here, the first sliding element 41 has pushed the second sliding element 42 with the connecting element 45 to the right in the drawing. The connecting element 45 acts directly on the shut-off element 44 of the shut-off valve 40 (see Figure 10 ) so that it is open. The lower area of the gas valve unit in the drawing is filled with gas (see dotted areas). On the other hand, the open-close valves 3 are still closed, so that the flow cross section of the gas valve unit is still zero.

In Figur 6 darüber hinaus zu erkennen ist die Ausbildung der Koppelvorrichtung 26 mit dem flachen Mitnehmer 27, der in die schlitzförmige Ausnehmung 28 des dritten kegelförmigen Körpers 43 eingesteckt ist. Eine axiale Bewegung der Betätigungswelle 31 ist durch diese Kombination aus Mitnehmer 27 und Ausnehmung 28 ausgleichbar, so dass eine solche Bewegung nicht auf die Betätigungsvorrichtung 25 der Auf-Zu-Ventile 3 übertragen wird.In Figure 6 The design of the coupling device 26 with the flat driver 27 which is inserted into the slot-shaped recess 28 of the third conical body 43 can also be seen. An axial movement of the actuating shaft 31 can be compensated for by this combination of driver 27 and recess 28, so that such a movement is not transmitted to the actuating device 25 of the open-close valves 3.

Figur 7 zeigt eine weitere Betriebsposition der Gasventileinheit, in der das Absperrventil 40 durch Eindrücken der Betätigungswelle 31 geöffnet ist und darüber hinaus eines der Auf-Zu-Ventile 3 mittels des Permanentmagnets 8 geöffnet ist. Durch dieses geöffnete Auf-Zu-Ventil 3 strömt nun Gas auch in den Bereich oberhalb des Auf-Zu-Ventils in Richtung des Gasausgangs 2. Das Absperrventil 40 wird hierbei mechanisch über das erste Gleitelement 41, das zweite Gleitelement 42 und das Verbindungselement 45 in Offenstellung gehalten. Figure 7 shows a further operating position of the gas valve unit, in which the shut-off valve 40 is opened by pressing in the actuating shaft 31 and, in addition, one of the open-close valves 3 is opened by means of the permanent magnet 8. Through this open on-off valve 3, gas now also flows into the area above the on-off valve in the direction of the gas outlet 2. The shut-off valve 40 is mechanically activated via the first sliding element 41, the second sliding element 42 and the connecting element 45 in Held open.

Im Gegensatz hierzu zeigt Figur 8 eine Betriebsstellung der Gasventileinheit, bei der das Absperrelement 44 des Absperrventils 40 mittels der Kraft eines in der vorliegenden Abbildung nicht dargestellten Elektromagnets in Offenstellung gehalten ist. Die Betätigungswelle 32 befindet sich hier in nicht eingedrückter Position, so dass das erste Gleitelement 41 keine Kraft auf das zweite Gleitelement 42 ausübt. In dieser Stellung befindet sich die Gasventileinheit während des laufenden Betriebs, wenn an dem mit der Gasventileinheit verbundenen Gasbrenner eine Flamme brennt.In contrast, shows Figure 8 an operating position of the gas valve unit in which the shut-off element 44 of the shut-off valve 40 is held in the open position by means of the force of an electromagnet not shown in the present figure. The actuating shaft 32 is here in a non-depressed position, so that the first sliding element 41 does not exert any force on the second sliding element 42. The gas valve unit is in this position during ongoing operation when a flame is burning on the gas burner connected to the gas valve unit.

Die Art der Betätigung des Absperrventils 40 wird nochmals anhand der Figuren 9, 10 und 11 näher beschrieben. Zu erkennen ist hier jeweils das erste Gleitelement 41, das zweite Gleitelement 42, ein von einer Feder gebildetes Verbindungselement 45, das Absperrelement 44 sowie eine Magneteinheit 50. Die geschlossene Ruheposition des Absperrventils 40 ist durch die auf den Absperrkörper 10 wirkende Feder 51 sichergestellt.The type of actuation of the shut-off valve 40 is again based on Figures 9, 10 and 11 described in more detail. The first sliding element 41, the second sliding element 42, a connecting element 45 formed by a spring, the shut-off element 44 and a magnet unit 50 can be seen here. The closed rest position of the shut-off valve 40 is ensured by the spring 51 acting on the shut-off body 10.

In der Darstellung gemäß Figur 9 ist die Betätigungswelle 31 nicht eingedrückt. Das Absperrventil 40 ist durch die Kraft der Feder 51 geschlossen. Das Verbindungselement 45 weist zu dem Absperrkörper 10 einen Abstand auf.In the representation according to Figure 9 the actuating shaft 31 is not pressed in. The shut-off valve 40 is closed by the force of the spring 51. The connecting element 45 is at a distance from the shut-off body 10.

In der Schaltstellung gemäß Figur 10 ist die Betätigungswelle 31 eingedrückt, so dass das zweite Gleitelement 42 mit dem Verbindungselement 45 nach in der Zeichnung links verschoben ist und das Absperrelement 44 entgegen der Kraft der Feder 51 von seinem Ventilsitz abhebt. Das Absperrventil 40 kann hierdurch von Gas durchströmt werden.In the switch position according to Figure 10 the actuating shaft 31 is pressed in, so that the second sliding element 42 with the connecting element 45 is shifted to the left in the drawing and the shut-off element 44 lifts off its valve seat against the force of the spring 51. The shut-off valve 40 can thereby be flowed through by gas.

In der Darstellung gemäß Figur 11 ist die Betätigungswelle 31 ebenfalls eingedrückt, jedoch weiter als in der Position gemäß Figur 10. Folglich ist auch das zweite Gleitelement 42 weiter nach in der Zeichnung links verschoben, als in Figur 10. Damit diese weitere Bewegung des zweiten Gleitelements 42 nicht auf das Absperrelement 44 des Absperrventils 40 übertragen wird, ist das Verbindungselement 45 als Feder ausgeführt. Die das Verbindungselement 45 bildende Feder ist jedoch wesentlich steifer ausgeführt als die Feder 51 des Absperrventils 40. Die Ausbildung des Verbindungselements 45 als Feder dient insbesondere dazu, Beschädigungen des Absperrventils 40 zu vermeiden, wenn auf die Betätigungswelle 31 mit übermäßig großer Kraft gedrückt wird.In the representation according to Figure 11 the actuating shaft 31 is also pressed in, but further than in the position according to FIG Figure 10 . Consequently, the second sliding element 42 is also shifted further to the left in the drawing than in FIG Figure 10 . So that this further movement of the second sliding element 42 is not transmitted to the shut-off element 44 of the shut-off valve 40, the connecting element 45 is designed as a spring. The spring forming the connecting element 45 is, however, made much stiffer than the spring 51 of the shut-off valve 40. The design of the connecting element 45 as a spring serves in particular to avoid damage to the shut-off valve 40 when the actuating shaft 31 is pressed with excessive force.

Figur 12 zeigt eine erfindungsgemäße Gasventileinheit im Querschnitt. Dargestellt sind der Gaseingang 1, welcher direkt in das Absperrventil 40 mündet. Von dem Absperrventil 40 sind insbesondere der Absperrkörper 10, die Feder 51 und die Magneteinheit 50 zu erkennen. Figure 12 shows a gas valve unit according to the invention in cross section. The gas inlet 1, which opens directly into the shut-off valve 40, is shown. Of the shut-off valve 40, the shut-off body 10, the spring 51 and the magnet unit 50 can be seen in particular.

Das als Feder ausgebildete Verbindungselement 45 ist zur Übertragung einer Druckkraft von dem zweiten Gleitelement 42 auf den Absperrkörper 10 geeignet. Das zweite Gleitelement 42 gleitet dabei an dem ersten Gleitelement 41 ab, welches aus der Betätigungswelle 31 ausgebildet ist.The connecting element 45 designed as a spring is suitable for transmitting a compressive force from the second sliding element 42 to the shut-off body 10. The second Sliding element 42 slides on first sliding element 41, which is formed from actuating shaft 31.

Unterhalb des ersten Gleitelements 41 befindet sich das dritte kegelförmige Element 43 mit der Koppelvorrichtung 26, die eine Drehbewegung der Betätigungswelle 31 auf den Permanentmagnet 8 überträgt. Der Permanentmagnet 8 öffnet mittels seiner Magnetkraft jeweils das direkt über ihm befindliche Auf-Zu-Ventil 3.The third conical element 43 with the coupling device 26, which transmits a rotary movement of the actuating shaft 31 to the permanent magnet 8, is located below the first sliding element 41. The permanent magnet 8 opens the open-close valve 3 located directly above it by means of its magnetic force.

BEZUGSZEICHENLISTEREFERENCE LIST

11
GaseingangGas inlet
22
GasausgangGas outlet
3 (3.1 bis 3.5)3 (3.1 to 3.5)
Auf-Zu-VentileOn-off valves
4 (4.1 bis 4.5)4 (4.1 to 4.5)
DrosselstellenThrottling points
55
DrosselstreckeThrottle section
6 (6.1 bis 6.4)6 (6.1 to 6.4)
VerbindungsabschnittConnection section
77th
EingangsabschnittEntrance section
88th
PermanentmagnetPermanent magnet
99
GaseingangsraumGas inlet room
1010
AbsperrkörperShut-off device
1111
Federfeather
1212
VentildichtplatteValve sealing plate
12a12a
Öffnungenopenings
1313
Druckplatteprinting plate
13a13a
Öffnungenopenings
1414th
erste Gasverteilungsplattefirst gas distribution plate
14a14a
Öffnungenopenings
1515th
DrosselplatteThrottle plate
1616
zweite Gasverteilungsplattesecond gas distribution plate
16a16a
Öffnungenopenings
1717th
AbschlussplatteEnd plate
1818th
DrosselöffnungenThrottle openings
2020th
VentilgehäuseValve body
2525th
BetätigungsvorrichtungActuator
2626th
KoppelvorrichtungCoupling device
2727
MitnehmerCarrier
2828
AusnehmungRecess
2929
BedienabschnittOperating section
3030th
Abdeckungcover
3131
BetätigungswelleOperating shaft
3232
AbdeckplatteCover plate
3333
MuldengehäuseTrough housing
3434
ArbeitsplatteCountertop
4040
AbsperrventilShut-off valve
4141
erstes Gleitelementfirst sliding element
4242
zweites Gleitelementsecond sliding element
4343
dritter kegelförmiger Körperthird conical body
4444
AbsperrelementShut-off element
4545
VerbindungselementConnecting element
5050
MagneteinheitMagnet unit
5151
Federfeather

Claims (12)

  1. Gas valve unit for setting a gas volume flow supplied to a gas burner of a gas appliance, in particular a gas cooker, wherein the gas valve unit has a valve housing (20) and an actuation pin (31), an operating segment (29) of which projects from the valve housing (20) and wherein a shutoff valve (40) is configured in the valve housing (20),
    wherein at least two on-off valves (3) are configured in the valve housing (20), which are disposed along an arc around the actuation pin (31), wherein it is possible to actuate the on-off valves (3) with the aid of an actuation apparatus (25), which is coupled to the actuation pin (31) by means of a coupling apparatus (26) at an end of the actuation pin (31) within the valve housing (20), by rotating the actuation pin (31), wherein it is possible to actuate the shutoff valve (40) by axially displacing the actuation pin (31), wherein the shutoff valve (40) has a moveable shutoff element (44), and wherein a deflection apparatus is provided, which converts an axial movement of the actuation pin (31) to an axial movement of the shutoff element (44) of the shutoff valve (40) at right angles thereto.
  2. Gas valve unit according to claim 1, characterised in that the movable shutoff element (44) of the shutoff valve (40) is pretensioned in the closing direction, in particular by means of spring force.
  3. Gas valve unit according to claim 2, characterised in that movable shutoff element (44) of the shutoff valve (40) can be moved into an open position counter to the pretensioning by pushing the actuation pin (31).
  4. Gas valve unit according to one of claims 1 to 3, characterised in that the deflection apparatus has a first slide element (41), which is disposed on the actuation pin (31) in the region of the end of the actuation pin (31) opposite the operating segment.
  5. Gas valve unit according to claim 4, characterised in that the first slide element (41) is embodied as a first conical element so that a tip of the first conical element points away from the operating segment of the actuation pin (31).
  6. Gas valve unit according to claim 4 or 5, characterised in that the deflection apparatus has a second slide element (42), which is in contact with the first slide element (41) at least when the actuation pin (31) is pushed.
  7. Gas valve unit according to claim 6, characterised in that the second slide element (42) is configured as a second conical element, the centre axis of which is disposed essentially perpendicular to the actuation pin (31) and the tip of which points in the direction of the first slide element (41).
  8. Gas valve unit according to claim 6 or 7, characterised in that the first slide element (41) and the second slide element (42) are configured and disposed so that an axial displacement of the actuation pin (31) as a result of pushing on the operating segment is converted to an axial displacement of the second slide element (42) in the direction away from the actuation pin (31).
  9. Gas valve unit according to one of claims 6 to 8, characterised in that the second slide element (42) is actively connected to the shutoff element (44) of the shutoff valve (40) so that an axial movement of the second slide element (42) in the direction away from the actuation pin (31) is transferred to the shutoff element (44).
  10. Gas valve unit according to one of claims 1 - 9, characterised in that the coupling apparatus (26) has a slot-type recess (28) on an end face of the end of the actuation pin (31) opposite the operating segment.
  11. Gas valve unit according to claim 1 or 10, characterised in that the coupling apparatus (26) comprises a flat carrier (27), which engages in the slot-type recess (28).
  12. Gas valve unit according to claim 5, 7 or 11,, characterised in that the recess (28) is disposed in a base of a third conical element (43), which is configured on the actuation pin (31) in the region of the end of the actuation pin (31) opposite the operating segment, so that a tip of the third conical element (43) points in the direction of the operating segment of the actuation pin (31) and is connected to a tip of the first conical element (41).
EP11794707.7A 2010-12-14 2011-12-07 Gas valve unit comprising a lift deflection system Active EP2652402B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11794707.7A EP2652402B1 (en) 2010-12-14 2011-12-07 Gas valve unit comprising a lift deflection system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10290660 2010-12-14
PCT/EP2011/072056 WO2012080054A2 (en) 2010-12-14 2011-12-07 Gas valve unit comprising a lift deflection system
EP11794707.7A EP2652402B1 (en) 2010-12-14 2011-12-07 Gas valve unit comprising a lift deflection system

Publications (2)

Publication Number Publication Date
EP2652402A2 EP2652402A2 (en) 2013-10-23
EP2652402B1 true EP2652402B1 (en) 2020-11-11

Family

ID=45346457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11794707.7A Active EP2652402B1 (en) 2010-12-14 2011-12-07 Gas valve unit comprising a lift deflection system

Country Status (9)

Country Link
US (1) US9206982B2 (en)
EP (1) EP2652402B1 (en)
KR (1) KR101924242B1 (en)
CN (1) CN103547865B (en)
AU (1) AU2011344470B8 (en)
ES (1) ES2834317T3 (en)
HK (1) HK1194130A1 (en)
RU (1) RU2546345C2 (en)
WO (1) WO2012080054A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015176975A1 (en) * 2014-05-22 2015-11-26 BSH Hausgeräte GmbH Gas fitting, cooking hob and gas cooking appliance
ES2828649T3 (en) * 2018-03-26 2021-05-27 Copreci S Coop Gas tap with safety valve for a gas cooking appliance, and a gas cooking appliance incorporating said gas tap

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Publication number Priority date Publication date Assignee Title
FR1403016A (en) * 1964-04-29 1965-06-18 Thermiguides Pneumatic valve with non-electric magnetic control, more particularly for textile machines
GB2196732B (en) * 1986-10-29 1990-09-19 Ti New World Ltd Gaseous fuel flow control arrangements
ES2039126T3 (en) * 1989-04-08 1993-08-16 Blue Circle Domestic Appliances Limited GAS PLATE.
FR2659130B1 (en) * 1990-03-05 1992-06-19 Sourdillon Sa GAS SUPPLY DEVICE FOR A GAS BURNER, PARTICULARLY FOR A FLAT-TYPE HOUSEHOLD APPLIANCE, EQUIPPED WITH AN ANGULAR DRIVE DEVICE.
IT220286Z2 (en) * 1990-11-19 1993-09-15 Imit TAP-GAS WITH MODULAR SAFETY SPECIES FOR COOKING HOBS OF LIMITED HEIGHT.
DE4041624A1 (en) * 1990-12-22 1992-07-02 Elektro Gas Armaturen FASTENER
IT1293697B1 (en) * 1997-04-30 1999-03-10 Op Srl Ora Op Controls S R L SAFETY AND REGULATION VALVE UNIT FOR A GAS SYSTEM, PARTICULARLY A HEATING SYSTEM
IT247344Y1 (en) 1999-06-02 2002-07-09 Siral S P A VALVE FOR GAS VALVE.
DE10249938A1 (en) * 2002-10-24 2004-05-13 Abb Research Ltd. Micro system valve has a ferromagnetic valve element moved by permanent magnets on a slider mounting
US20060057520A1 (en) * 2004-09-16 2006-03-16 Saia Richard J Control valve assembly for controlling gas flow in gas combustion systems
EP1672279B1 (en) * 2004-12-16 2011-03-16 Coprecitec, S.L. Gas flow tap for a gas burner
DE102008027546A1 (en) * 2008-06-10 2009-12-17 Heatec Thermotechnik Gmbh Valve device for combustible gases, has valve for releasing or locking of gas flow, where bistable actuator is provided, which is connected to control device
CN201277586Y (en) * 2008-10-10 2009-07-22 山东大学 Gas cut-off and flux valve for automobile heater

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None *

Also Published As

Publication number Publication date
AU2011344470B2 (en) 2015-05-14
CN103547865A (en) 2014-01-29
HK1194130A1 (en) 2014-10-10
WO2012080054A3 (en) 2013-10-17
KR101924242B1 (en) 2018-11-30
RU2546345C2 (en) 2015-04-10
RU2013129298A (en) 2015-01-20
US20130248745A1 (en) 2013-09-26
AU2011344470B8 (en) 2015-07-23
EP2652402A2 (en) 2013-10-23
KR20130132539A (en) 2013-12-04
WO2012080054A2 (en) 2012-06-21
AU2011344470A1 (en) 2013-07-11
US9206982B2 (en) 2015-12-08
CN103547865B (en) 2016-01-20
ES2834317T3 (en) 2021-06-17

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