KR20140066721A - Gas valve unit - Google Patents

Abstract

The subject matter of the present invention is a gas valve unit for regulating the gas flow volume supplied to a gas burner of a gas-operated device, the gas valve unit comprising a plurality of individually actuated And has a throttle that can be operated.

Description

Gas valve unit {GAS VALVE UNIT}

The present invention relates to a gas valve unit for setting a gas volume flow to be supplied to a gas appliance, in particular, to a gas burner of a gas cooking appliance.

Gas valve units of this type are described, for example, in EP0818655A2 and WO2004063629A1. Such a gas valve unit can be used to control the gas volume flow supplied to the gas burner of the gas cooking appliance in a number of steps. At this time, the gas volume flow is made reproducible in each step. The flow through cross section of the overall gas valve unit and thus the size of the gas volume flow is set by opening or closing a predetermined open / close valve of the gas valve unit to allow or prevent gas flow through the predetermined throttle opening.

Also, a gas conversion option is described in the patent application "Structure of gas valve unit" (201002677), which has not yet been published on the filing date of the present application. If gas conversion is required in such a gas valve unit, the cover plate must be removed and removed from the valve housing of the gas valve unit. When the connection between the valve housing and the cover plate is released, the valve body is pushed against the sealing plate so that air is introduced into the system, so that it can be easily removed from the valve housing. In this process, the handle shaft remains connected to the valve housing in a fixed manner. When the cover plate is removed, the sealing plate, the pressure plate and the lower gas distribution plate can be separated as individual plates or composite plates.

An opening is provided in the cover plate, which enables control of the nozzle plate used. The slight pressure on the nozzle plate through the opening causes the nozzle containing the sealing compound plate to be pushed out of the cover plate attachment. The upper gas distribution plate may be retained within the cover plate. The nozzle plate can then be removed and replaced for conversion. The corresponding shape of the component allows only one integration option. Plates are replaced in the cover plate in reverse order. This solution has the disadvantage that the cover plate must be disassembled prior to the change of the gas type and must be reassembled after changing the gas type.

It is an object of the present invention to provide a gas valve unit of the type mentioned at the outset, in which the components need not be disassembled for gas conversion.

According to the present invention, this object is achieved in that the gas valve unit has a plurality (N) individually actuatable throttle sections arranged in parallel for setting the through flow rate of the gaseous volumetric flow.

A plurality of throttling sections arranged in parallel enables different through flow rates to be set, in particular as a function of different gas types.

In this process, the throttle sections are suitably combined in various ways by activating or deactivating individually actuatable throttle sections for gas conversion.

As an example, there is no longer a need to replace the nozzle plate when converting from natural gas to liquefied gas. Also, since a number of uses are possible within the nozzle plate, at least one type of nozzle plate may be removed. There is no need to carry out any sealing check since the nozzle plate replacement is unnecessary and therefore the fastener need not be opened. Further, for this reason, it is not necessary to disassemble the switch strip of the gas valve unit. A plurality of possible combinations of throttle sections means that a predefined gradation can be set as needed and thus the required settings for any gas type can be achieved. As an example, if the standard gradient is too inaccurate for a user or a consumer in a low power range, it is possible to set a more accurate gradient in a lower power range with the help of various combinations of throttle sections or various throttle sections.

In one preferred embodiment, each throttle section has a plurality (M) of throttle points arranged in series.

The throttle point may also be referred to as a throttle element, a control element or a control device.

In one preferred embodiment, the serially arranged throttle points have an opening cross section that increases along the line.

Therefore, it is possible to increase the connected load in accordance with the rotation angle of the operation shaft. By way of example, during reverse conversion from liquefied gas to natural gas, an accurate through flow value can be achieved by the defined opening cross section.

In another preferred embodiment, each throttle section has a throttle section switch for activating and deactivating the throttle section.

Each throttle section can be activated or deactivated by a respective throttle section switch.

In one preferred embodiment, each throttle section has a plurality of (M) throttle points arranged in series and a throttle section switch connected downstream of the throttle point for activating and deactivating the throttle section.

In another preferred embodiment, a triggering facility is provided to trigger the N throttle section switch. The trigger facility is set to select a predetermined trigger profile among a plurality of predetermined trigger profiles for triggering the N throttle section switch as a function of the gas type used. In addition, the trigger facility can trigger the N throttle section switch with the selected trigger profile.

Thus, the through flow rate of the gas volume flow required for each gas type can be set automatically by the trigger facility.

In one preferred embodiment, the gas valve unit has a plurality (M) of valve units. The i-th valve unit is here set to trigger the i-th (i? [1, ..., M]) throttle point of the throttle section.

This means, for example, that the first throttle points of the throttle section are triggered, in particular simultaneously triggered, by the first valve unit.

In another preferred embodiment, each valve unit has a number (N) of opening / closing valves. Here, the jth open / close valve is set to trigger the jth (j? [1, ..., N]) throttle section. When the open / close valve is closed, it is positioned on the valve seat. This closes the valve seat opening. The valve seat of the open / close valve may preferably be formed by a common component formed by the valve seal plate.

In another preferred embodiment, the N open / close valves of each valve unit can be operated simultaneously by operating the control device. The control device is formed, for example, by a movable, self-actuating device, in particular by a permanent magnet. In order to open the open / close valve, the car body is lifted from the valve seat by the force of the permanent magnet arranged above and below the open / close valve that confronts the force of the spring.

Hereinafter, the term "permanent magnet" is also used to denote other magnetic actuators. When the movement of the permanent magnet occurs manually by the operator, no electrical components are required to switch the valve unit, in particular the open / close valve of the valve unit. Alternatively, the permanent magnets may be moved by any actuator, for example, an electric motor. Here, the electric motor is triggered by the electric control unit or the control device. This control unit allows the same gas valve unit to be mechanically actuated by the operator or by an electrical actuator as required. During the manufacture of a cooking appliance, a gas valve unit of the same construction can be combined with a mechanical user interface, such as a rotary knob and also an electrical user interface, e.g. a touchscreen.

In one preferred embodiment, the N opening / closing valve of each valve unit is formed by a spring acting on the carbody, the carbody, and a plurality of separating walls to provide a gaseous volumetric flow to the N throttle section.

In another preferred embodiment, the N-valving unit can be operated in an additional manner by moving at least one magnetic actuator, in particular a permanent magnet, relative to the valve unit.

In another preferred embodiment, the conversion facility for gas conversion is arranged in the region of the operating shaft of the gas valve unit. The conversion equipment is configured as a screw, for example. The screw for converting the gas type can be located further in the center than on the conical fastener, on the handle shaft.

The gas valve unit is particularly a part of a manually operated multi-position device consisting of a valve portion and an adapted ignition guard. Particularly, the valve part incorporates a knob or a rotary knob, a permanent magnet, a valve, a nozzle and a seal. The handle can be pressed by a light pressure, which activates the ignition protection. The open / close valve or the ferrite valve prevents the through flow to the associated opening or seal opening by applying pressure on the seal in the at least one gas seal by the at least one resilient component. The resilient component or spring is retained in the lid which is positioned in a gas-tight manner.

Gas tightening arrangements for gas appliances are also proposed, which have at least one gas valve unit as described above.

Further, a gas appliance having the gas fastening as described above is proposed. The gas appliance is, for example, a gas oven.

Other advantages and details of the present invention are explained in more detail on the basis of exemplary embodiments illustrated in the schematic drawings.

Figure 1 shows a schematic switching device of a first embodiment of a gas valve in a switching position for city gas.
Figure 2 shows a schematic switching device of a first embodiment of a gas valve unit in a switching position for natural gas.
Figure 3 shows a schematic switching device of a first embodiment of a gas valve unit in a switched position for liquefied gas.
Figure 4 shows a schematic switching device of a first embodiment of a gas valve unit in another switching position for natural gas.
Figure 5 shows a schematic switching device of a second embodiment of a gas valve unit.
Figure 6 shows a schematic switching device of a second embodiment of a gas valve unit in a first switching position.
Figure 7 shows a schematic switching device of a second embodiment of a gas valve unit in a second switching position.
Figure 8 shows a schematic switching device of a second embodiment of a gas valve unit in a third switching position.
Figure 9 shows a schematic switching device of a second embodiment of a gas valve unit in a fourth switching position.
Figure 10 shows an embodiment of a gas valve unit, seen from the lower side of the sealed composite plate.
Fig. 11 shows an exploded view of the sealing composite plate, the nozzle plate and the upper gas distribution plate of the gas valve unit.
Figure 12 is a top view of the sealing composite plate from Figure 11;
13 shows an embodiment of a cover plate having a sealing composite plate, a nozzle plate and an upper gas distribution plate of a gas valve unit.

1 to 4 show a schematic switching device of the gas valve unit of the present invention in a continuous switching state. These show the gas inlet 1, which is connected to the main gas line of the gas cooking appliance by way of example. The gas provided for combustion is provided to the gas inlet 1, for example, at a constant pressure of 20 mbar or 50 mbar. As an example, the gas line leading to the gas burner of the gas cooking appliance is connected to the gas output 2 of the gas valve unit.

The gas valve unit has a plurality (N) of individually actuatable throttle sections (3, 4, 5) arranged in parallel for setting the through flow rate of the gas volume flow. The parallel throttle sections 3, 4, 5 are arranged between the gas input section 1 and the gas output section 2. 1 to 4, N = 3, but this should not be construed as restricting its general characteristics.

Each throttle section 3, 4, 5 has a number (M) of throttle points (3.1-3.4, 4.1-4.4, 5.1-5.4) arranged in series. M = 4 in Fig. 1, but it should not be understood as limiting its general characteristics. Thus, the first throttle section 3 has a first throttle point 3.1, a second throttle point 3.2, a third throttle point 3.4 and a fourth throttle point 3.5. The second throttle section 4 and the third throttle section 5 are correspondingly structured. The throttle points (3.1-3.4, 4.1-4.4, 5.1-5.4) have an opening cross section that increases along the line. As an example, the opening cross-section of throttling point 3.2 is therefore larger than the opening cross-section of throttling point 3.1. Further, the opening end face of the throttle point 3.3 is larger than the opening end face of the throttle point 3.2. Further, the opening end face of the throttle point (3.4) is larger than the opening end face of the throttle point (3.3).

Further, each throttle section 3, 4, 5 has throttle section switches 3.5, 4.5, 5.5 to activate and deactivate the corresponding throttle sections 3, 4, 5. As an example, the first throttle section switch 3.5 is set to activate and deactivate the first throttle section 3.

A triggering arrangement (not shown) is provided to trigger the throttle section switch (3.5, 4.5, 5.5) in particular. The trigger facility selects a predetermined trigger profile from among a plurality of predetermined trigger profiles to trigger throttle section switches (3.5, 4.5, 5.5) as a function of the type of gas used and correspondingly switches the throttle section switch , 4.5, 5.5).

The gas valve unit also has a main valve unit 8 arranged in parallel to the main throttle point 7 and throttle sections 3, 4 and 5 arranged downstream of the parallel throttle sections 3, 4 and 5 . Further, the main valve unit 8 may be referred to as a main switching device.

Further, the gas valve unit has a plurality (M) of valve units (6.1, 6.2, 6.3, and 6.4) (M = 4). 1, N = 3. Thus, each valve unit (6.1, 6.2, 6.3, 6.4) has three open / close valves (6.1.1, 6.1.2, 6.1.3, 6.2.1, 6.2.2, 6.2.3, 6.3.1, 6.3.2, 6.3.3, 6.4.1, 6.4.2, 6.4.3). As an example, the first valve unit 6.1 includes a first open / close valve 6.1.1 for triggering the first throttle section 3, a second open / close valve 6.1.1 for triggering the second throttle section 4, A closing valve 6.1.2 and a third open / close valve 6.1.3 for triggering the third throttle section 5. In general, the jth open / close valves (6.1.1, 6.2.1, 6.3.1, 6.4.1; 6.1.2, 6.2.2, 6.3.2, 6.4.2; 6.1.3, 6.2.3, 6.3.3, 6.4.3) is set to trigger the j th throttle section (3-5), where j? [1, ..., N]. By way of example, the first open / close valves 6.1.1, 6.2.1, 6.3.1, 6.4.1 of the valve units 6.1, 6.2, 6.3 and 6.4 trigger the first throttle section 3.

In the example of Fig. 1, all three throttle section switches 3.5, 4.5, 5.5 are closed. Thus, the switching steps are formed in a common way by the partial rate of the three throttle sections 3, 4, 5 before they flow through the main throttle point 7 without clogging. This combination of throttle sections 3, 4, 5 represents a city gas variant example. City gas has the lowest calorific value and therefore requires the greatest through flow rate.

Figure 2 shows a schematic switching device of a first embodiment of a gas valve unit in a switching position for natural gas. Fig. 2 differs from Fig. 1 in that the third throttle section switch 5.5 for the third throttle section 5 is open. With this combination of the throttle section 3-5 according to Fig. 2, the partial flow rate of the gas through flow rate is formed only by the second throttle section 4 and the first throttle section 3.

Figure 3 shows a schematic switching device of a first embodiment of a gas valve unit in a switched position for liquefied gas. According to Fig. 3, the first throttle section switch 3.5 is closed and the second throttle section switch 4.5 and the third throttle section switch 5.5 are open. 3, the partial flow rate of gas through flow rate is formed only by the first throttle section 3 only. This setting indicates liquefied gas deformation.

In Fig. 4, the first throttle section switch 3.5 is open and the second throttle section switch 4.5 and the third throttle section switch 5.5 are closed. In this combination, the partial flow rate of the gas flow rate is formed by the second throttle section 4 and the third throttle section 5. This setting can be used, for example, for burners having a significantly lower burnout output for natural gas.

In summary, the exemplary switching device of the gas valve unit of Figs. 1 to 4 can be used in a reproducible manner and with a throttle section and valve unit (switching device) to set the prescribed gradation for setting the through flow rate of the gaseous volumetric flow, ) Are possible.

Figure 5 shows a schematic switching device of a second embodiment of a gas valve unit. The gas valve unit of Fig. 5 has a first throttle section 3 and a second throttle section 4. The first throttle section 3 has four throttle points 3.1 to 3.4. Correspondingly, the second throttle section 4 has four throttle points 4.1-4.4. The respective connecting segments 3.6-3.9 in the first throttle section 3 and the corresponding connecting sections 4.6-4.9 of the second throttle section 4 are schematically shown. Each throttle section 3, 4 has an input segment (3.10 or 4.10). Five open / close valves (6.1.1-6.1.5) are provided in the throttle sections (3,4). Each open / close valve (6.1.1-6.1.4) forms two switching devices, one for each throttle section (3, 4). The open / close valve (6.1.5) has only one switching device, because it is the entire combustion valve. 5 shows the detail of the opening / closing valve 6.1.1 formed by the spring 13 and the separation wall 9.1 acting on the car 12, the car 12, and the like. The separating wall 9.1 separates the channels into input segments 3.10 and 4.10.

Figures 6-9 illustrate a schematic switching device of a second embodiment of a gas valve unit in various switching positions. The inlet side surfaces of the first four open / close valves (6.1.1-6.1.4) are in each case divided by the separating walls (9.1-9.4). Since the outlet side gas flows directly to the gas outlet 2, the final open / close valve 6.1.5 is not divided by the separating wall. Opening the open / close valves 6.1.1-6.1.5 connects the gas input 1 in each case to a predetermined segment of the throttle section 3, 4 and opens each open / closed The gas flows by valves (6.1.1-6.1.5). As described above, the throttle sections 3,4 include the input segments 3.10 and 4.10, into which the first open / close valve 6.1.1 is opened. Each of the other open / close valves (6.1.2-6.1.5) opens to the connecting segment (3.6-3.9 or 4.6-4.9) of the throttle section (3,4). The transition between the input segments 3.10 and 4.10 and the first connection segment 3.6 and 4.6 and the transition segment between the adjacent connection segments 3.6-3.9 and 4.6-4.9 is the throttle point 3.1-3.4 or 4.1- 4.4). Each final throttle point (3.4 or 4.4) connects the final connection segment (3.9 or 4.9) to the gas output section (2).

The throttle point 3.4 of the throttle section 3 can be closed by the throttle section switch 3.5 and also the final connecting segment 3.9 can be connected to the gas output section 2. [

The open / close valves 6.1.1-6.1.5 are operated in particular by the permanent magnets 11, which can be displaced along the lines of the open / close valves 6.1.1-6.1.5. The force for opening each of the open / close valves 6.1.1-6.1.5 is directly formed by the magnetic force of the permanent magnet 11 here. This magnetic force opens each of the open / close valves (6.1.1-6.1.5) against the spring force of the spring (13).

In the switching position according to FIGS. 5 and 6, only the first open / close valve 6.1.1 is open. The gas from the gas inlet 1 flows into the input segments 3.10 and 4.10 through this first opening / closing valve 6.1.1 and from there to all the throttle points 3.1- 3.4, 4.1-4.4) and all connection segments (3.6-3.9, 4.6-4.9). The amount of gas flowing through the gas valve unit of Figures 5 and 6 presupposes the minimum output of the gas burner connected to the gas valve unit.

7 shows a switching device in which the permanent magnet 11 is displaced to the right in such a manner that both the first open / close valve 6.1.1 and the second open / close valve 6.1.2 are open. The gas from the gas inlet 1 flows into the first connecting segment 3.6 and 4.6 through the open second open / close valve 6.1.2, from which throttling points 3.2-3.4 and 4.2-4.4 are opened, And flows to the gas output portion 2 through the gas outlet portion 2. Thus, the gas flowing into the gas output 2 bypasses the first throttling points 3.1 and 4.1 due to the open / close valve 6.1.2. Therefore, the gas volume flow at the switching position according to FIG. 7 is greater than the gas volume flow at the switching position according to FIGS.

The gas is supplied almost entirely to the first connection segment (3.6 and 4.6) by the second opening / closing valve (6.1.2). Since the open / close valves 6.1.1 and 6.1.2 are open, the same pressure level exists in the input segments 3.10 and 4.10 as in the first connection segments 3.6 and 4.6. Substantially, no gas then flows from the input segments 3.10 and 4.10 through the first throttling points 3.1 and 4.1 to the first connecting segments 3.6 and 4.6. Thus, the gaseous volumetric flow as a whole flowing through the gas valve unit causes the permanent magnet 11 to be further moved to the right in the figure to close the first open / close valve 6.1.1 and to close the second open / close valve 6.1.2) remain open. ≪ / RTI > By moving the permanent magnet 11 to the right side of the figure, the open / close valve (6.1.3-6.1.5) is opened continuously. This increases the gas volume flow through the gas valve unit step by step.

8 shows a switching device of the gas valve unit in which the permanent magnet 11 is displaced to the right in such a manner that both the first open / close valve 6.1.1 and the second open / close valve 6.1.2 are open Respectively. In contrast to FIG. 7, the throttle point 3.4 is closed by the throttle section switch 3.5.

The gas from the gas inlet 1 flows directly into the first connection segment 4.6 through the open second open / close valve 6.1.2 and from there through the throttle points 4.2-4.4 to the gas outlet (2). The other gas path leads from the open / close valve 6.1.2 into the first connecting segment 3.6 of the first throttle section 3 and from there passes through the throttle point 3.2-3.4. However, the throttle point 3.4 is closed by the throttle section switch 3.5 so that no other gas can flow to the gas output 2 via the connecting segment 3.9.

The gas flowing into the gas outlet 2 bypasses the first throttling points 3.1 and 4.1 due to the open / close valve 6.1.2. The gas volume flow in the switching position according to FIG. 8 is thus smaller than the gas volume flow in the switching position according to FIG. The gas is supplied to the first connection segments 3.6 and 4.6 almost entirely via the second opening / closing valve 6.1.2. Because the open / close valves 6.1.1 and 6.1.2 are open, the same pressure levels as in the first connection segments 3.6 and 4.6 are present in the input segments 3.10 and 4.10. At this time, substantially no gas flows from the input segments 3.10 and 4.10 to the first connection segments 3.6 and 4.6 through the first throttling points 3.1 and 4.1. Thus, the gaseous volumetric flow as a whole flowing through the gas valve unit is maintained substantially the same when the permanent magnets 11 are further moved to the right to close the first open / close valve 6.1.1, The open / close valve (6.1.2) is kept open.

9 shows the switching device of the gas valve unit at the maximum open position. Here, the permanent magnet 11 is located at its end position on the right side as illustrated in the figure. When the permanent magnet 11 is in this position, the final open / close valve 6.1.5 is opened. At this time, the gas flows from the gas inlet 1 to the final connecting segments 3.9 and 4.9 and directly to the gas outlet 2. The position of the throttle section switch 3.5 here does not affect the gas flow.

 In the examples of Figures 5 to 9, the permanent magnet 11 and the components of the open / close valves 6.1.1-6.1.5 are connected to a single open / close valve 6.1.1 -6.1.5) or only two open / close valves (6.1.1-6.1.5) are open to each other. The switching behavior described above may also be achieved by other components and equipment, e.g., mechanical, electrical, pneumatic, hydraulic or combinations thereof.

During switching from one open / close valve (6.1.1-6.1.4) to an adjacent open / close valve (6.1.2-6.1.5), both adjacent open / close valves (6.1.1-6.1.5) Is opened for a short period of time. This ensures that the switching does not result in a short interruption of the gas supply to the gas burner and thus the flickering or turning off of the flame. The switching position described above also ensures that the gas volume flow does not increase for a while during the switching operation. This also reliably prevents flaring of the gas flame during the switching operation.

Fig. 10 also shows an embodiment of the gas valve unit. 10 shows a cover plate 14 with a specifically sealed composite plate and an integrated nozzle plate. The sealed composite plate may consist of discrete components consisting of a valve seal plate, a pressure plate and a lower gas distribution plate. Figure 10 also shows the separation walls 9.1-9.8 of the eight open / close valves. The entire combustion valve 21 does not have any separation walls.

Fig. 11 shows an exploded view of the sealing compound plate 15, the nozzle plate and the upper gas distribution plate 16. Fig. The path 18 of the gas flow from the low combustion position 17 to the gas output 2 is schematically shown in Fig.

Figure 12 shows a top view of the sealing composite plate from Figure 10;

13 shows an embodiment of a cover plate 14 having a sealing compound plate 15, a nozzle plate 22 and an upper gas distribution plate 16 of a gas valve unit. It is also possible that the sealing compound plate 15 is composed of discrete components, for example, a sealing plate 15.1, a pressure plate 15.2 and a lower gas distribution plate 15.3. 13 also shows the screw 19 in the region of the opening of the actuating shaft 20 of the gas valve unit. Screw 19 is set for gas conversion purposes. When the screw 19 is screwed up to the screw collar, below the diaphragm seal is seated in a sealed manner on the nozzle plate 22 and thus prevents gas flow by this path.

1 gas inlet
2 gas output section
3 First throttle section
3.1-3.4 throttle point of first throttle section
3.5 Throttle section switch of first throttle section
3.6-3.9 Connection Segments
3.10 Input Segments
4 Second throttle section
4.1-4.4 Throttle point of the second throttle section
4.5 Throttle section switch of the second throttle section
4.6-4.9 Connection Segments
4.10 Input Segments
5 Third throttle section
5.1-5.4 Throttle point of the third throttle section
5.5 Throttle section switch in the third throttle section
6.1 First valve unit
6.1.1-6.1.5 Open / Close Valve
6.2 Second valve unit
6.2.1-6.2.3 Open / Close Valve
6.3 Third Valve Unit
6.3.1-6.3.3 Open / Close Valves
6.4 Fourth valve unit
6.4.1-6.4.4 Open / Close Valve
7 week throttle point
8 main valve unit
9.1-9.8 Separation wall
10 gas input chamber
11 permanent magnet
12th organization
13 spring
14 Cover plate
15 sealed composite plate
15.1 Sealing plates
15.2 Pressure plate
15.3 Lower gas distribution plate
16 upper gas distribution plate
17 Lower combustion position
18 Paths
19 Screw
20 An opening for the operating shaft
21 Total combustion valve
22 nozzle plate

Claims (14)

A gas valve unit for setting a gas volume flow supplied to a gas appliance, particularly a gas burner of a gas cooking appliance,
Characterized in that the gas valve unit comprises a plurality (N) of individually operable throttle sections (3, 4, 5) arranged in parallel for setting the through flow rate of the gas volumetric flow. A gas valve according to claim 1, wherein each of the throttle sections (3, 4, 5) has a plurality of throttling points (3.1-3.4, 4.1-4.4, 5.1-5.4) arranged in series. unit. 3. The gas valve unit according to claim 2, wherein the serially arranged throttle points (3.1-3.4, 4.1-4.4, 5.1-5.4) have an opening cross section increasing along the line. 4. A throttle valve according to any one of claims 1 to 3, wherein each throttle section (3, 4, 5) comprises throttle section switches (3.5, 4.5, 5.5) for activating and deactivating throttle sections Wherein the gas valve unit comprises: 2. The system according to claim 1, characterized in that each throttle section (3, 4, 5) comprises a plurality (M) of throttle points (3.1-3.4, 4.1-4.4, 5.1-5.4) and throttle sections 4.5, 5.5) arranged downstream of the throttle point (3.1-3.4, 4.1-4.4, 5.1-5.4) for activating and deactivating the throttle valve (5, 5). 6. A trigger system according to claim 4 or 5, characterized in that a triggering facility is provided for triggering the M throttle section switches (3.5, 4.5, 5.5) and the triggering arrangement comprises M throttle section switches (3.5, 4.5, 5.5, 5.5), and to trigger the M throttle section switch (3.5, 4.5, 5.5) with the selected trigger profile selected from among the plurality of trigger profiles. 7. A method according to any one of claims 1 to 6, wherein a plurality (M) of valve units (6.1, 6.2, 6.3, 6.4) are provided, (1), (2), (3), (4) and (5) ..., M]. 8. The system of claim 7, wherein each valve unit (6.1, 6.2, 6.3, 6.4) comprises a plurality (N) of open / close valves (6.1.1, 6.1.2, 6.1.3, 6.2.1, 6.2.2, 6.2.3, 6.3.1, 6.3.2, 6.3.3, 6.4.1, 6.4.2, 6.4.3) and the jth open / close valve (6.1.1, 6.2.1, 6.3.1, 6.4.1, 6.1.2, 6.2.2, 6.3.2, 6.4.2, 6.1.3, 6.2.3, 6.3.3, 6.4.3) is set to trigger the j th throttle section (3-5) , Where j? [1, ..., N]. 9. The method according to claim 8, wherein the N open / close valves (6.1.1, 6.1.2, 6.1.3, 6.2.1, 6.2.2, 6.2.3, 6.3.1, 6.3.2, 6.3.3, 6.4.1, 6.4.2, 6.4.3) can be operated simultaneously by operating the control device. 10. A method according to claim 8 or 9, characterized in that the N opening / closing valves (6.1.1, 6.1.2, 6.1.3, 6.2.1, 6.2.2, 6.2.3, 6.3.1, 6.3.2, 6.3.3, 6.4.1, 6.4.2, 6.4.3) are provided on the vehicle 12, the spring 13 acting on the vehicle 12, Is formed by a plurality of separation walls (9.1-9.4) for supplying a gaseous volumetric flow to the throttle section (3-5). The valve unit according to any one of claims 7 to 10, characterized in that the M valve unit (6.1, 6.2, 6.3, 6.4) comprises at least one magnetic actuator (11) , 6.4). ≪ / RTI > 12. A gas valve unit according to any one of the preceding claims, characterized in that the conversion device for gas conversion, in particular the screw (19), is arranged in the region of the operating shaft (20) of the gas valve unit. A gas fastener comprising at least one gas valve unit according to any one of the preceding claims. A gas appliance having a gas tightening tool according to claim 13, in particular a gas oven.

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