EP2572143B1 - Gas valve unit having two gas outlets - Google Patents

Description

The invention relates to a gas valve unit for adjusting gas volume flows to a two-circuit gas burner of a gas appliance, in particular a gas cooking appliance, wherein the gas valve unit has a gas inlet and two gas outlets.

In gas cooking appliances gas burners are often used, which have two concentrically arranged rings with gas outlet openings. During operation of the gas hob, a flame ring may burn on each of the rings with gas outlets. If the gas volume flows to the two rings with gas outlet openings are adjustable separately, these gas burners are referred to as two-circuit gas burner. Compared to conventional gas burners with only one flame ring, dual-circuit gas burners typically have a larger maximum burn rate. In addition, dual-circuit gas burners have a particularly large spread between minimum burning power and maximum burning power. At maximum burning power, both flame rings burn with the largest possible flames. With minimal power, only the smaller flame ring burns with the flames as small as possible, while no gas escapes from the larger ring with flame outlet openings.

Gas valves for supplying two-circuit gas valves have a gas inlet, with which the gas valve is connected to a main gas line of the gas cooking appliance. A first gas outlet of the gas valve opens into a first partial gas line leading to the smaller ring with gas outlet openings. A second gas outlet is connected to a leading to the larger ring with gas outlet openings partial gas line. Such a gas valve for a two-circuit gas burner is for example in the WO 2008/141916 A2 described.

Dual-circuit gas valves have a single actuation element, with which both the gas flow for supplying the first flame ring and the gas flow for supplying the second flame ring can be adjusted. According to a conventional design, the switching position for the maximum power of both flame rings is immediately followed by the completely closed position of the two-circuit gas valve. Another Actuating the control element initially reduces the performance of the larger flame ring until it is completely extinguished. Subsequently, the power of the smaller flame ring is reduced until it has reached its minimum power. In this embodiment, depending on the position of the actuating element, either the two-circuit gas valve is completely closed or open only the gas flow to the smaller ring with gas outlet openings or the gas flow to both rings with gas outlet openings open. However, it is not intended to close the gas flow to the smaller ring with gas outlet openings, while the gas flow is opened to the larger ring with gas outlet openings.

Known gas valve units for two-circuit gas burners are generally designed as plug valves, in which by means of the actuating element, a valve plug is rotated in a valve housing. In these known valves, the exact setting of a desired burning performance and the reproducibility of such a setting proves to be difficult. An example of a setting device of a gas tap device, which can also be used for dual-circuit burners is, for example, in WO 2009/010400 A1 , which discloses the preamble of claim 1, described. Here, the adjusting device comprises at least one channel unit, via which the gas flow to the gas outlets can be adjusted by means of a setting unit. As a setting unit serves a rotatable sleeve-shaped base body, in the outer side recesses are provided for the opening of the cavity to one or more channels of the channel unit.

Further disclosed EP 0 818 655 A2 a method and apparatus for controlling the flame size of gas fired cooking or baking appliances. In this case, it is proposed to use a number of throttling elements connected in series with switching elements connected in parallel to reduce the gas flow. The switching elements are arranged for this purpose in a bypass line to the gas line. A use for two-circuit gas burner is not described. In addition, in this arrangement a targeted driving a throttle element or setting a maximum gas flow possible only by operating a plurality of switching elements.

The present invention is based on the object to provide a generic gas valve unit available, in which the adjustability is improved.

This object is achieved by the features of independent claim 1.

The gas volume flow can thus be set exactly and reproducibly in several stages. The switching stage, in which the gas volume flow is maximum, adjacent directly to the zero position of the gas valve unit. When the gas valve unit is opened, the gas volume flow is thereby immediately set to a maximum value. This ensures that the gas-conducting components behind the gas valve unit quickly fill with gas. In addition, ignition of the gas burner takes place particularly reliably at maximum gas volume flow. The gas valve unit is thus immediately after opening in an optimal position for igniting the gas burner.

It is also advantageous if, in a switching position adjacent to the zero position, the multi-stage adjustable gas volume flow is set to a maximum value and the gas volume flow leading to the other gas outlet is also open. After opening the gas valve unit, the gas flow to both gas outlets is thus immediately opened.

With particular advantage, the gas volume flows to both gas outputs are multi-level adjustable, wherein in a switching position adjacent to the zero position both Gas volume flows are set to a maximum value. As a result, all gas-carrying components behind the gas valve unit are filled very quickly with gas. Ignition of the gas burner takes place in the switching position adjacent to the zero position with maximum gas discharge from all gas outlet openings.

The gas valve unit preferably has at least two open-close valves and at least two first throttling points, preferably at least three first open-close valves and at least three first throttling points, for setting the gas volumetric flow supplied to a first gas outlet. The number of open-close valves and the number of throttle points are decisive for the number of available switching stages. The more switching stages are available, the finer the burning power of the gas burner associated gas valve can be set.

Analogous advantages arise when the gas valve unit for adjusting the gas flow supplied to a second gas outlet at least two second open-close valves and at least two second throttle points, preferably at least four second open-close valves and at least four second throttle points.

For controlling the on-off valves, preferably at least one magnetically active body is provided, which is movable relative to the open-close valves. For example, a magnetically active body may be a permanent magnet capable of attracting a ferromagnetic valve body of the on-off valve. Likewise, the magnetically active body may be a non-permanently magnetized ferromagnetic body when a valve body of the open-close valve is formed by a permanent magnet or connected to a permanent magnet. The on-off valves are opened or closed by moving the magnetically-active body relative to the open-close valves. Only when the magnetically active body is in the immediate vicinity of the open-close valve does a magnetic force act between the magnetically active body and the on-off valve opening the on-off valve.

An advantageous embodiment of the invention provides that at least two magnetically active bodies are provided for controlling the open-close valves, wherein a first magnetically active body is formed by a ferromagnetic body and the second magnetically active body is formed by a permanent magnet.

Here, the first magnetically active body and the second magnetically active body are coupled to each other so that they are movable in synchronism with the open-close valves. The coupling is preferably carried out so that the two magnetically active body are forced to always synchronously with each other.

At least one first on-off valve has a permanent magnet, such that this first on-off valve is controllable in dependence on the position of the first magnetically active body formed by a ferromagnetic body. The other open-close valves, which have no permanent magnet, however, can not be controlled by the first magnetically active body having a ferromagnetic body.

Further, it is advantageous if the first magnetically active body formed by a ferromagnetic body is designed such that it causes in at least three switching positions of the gas valve unit opening of a permanent magnet having on-off valve. The on-off valve having a permanent magnet is thus opened in contrast to the other open-close valves in several switching positions of the gas valve unit.

An immediate complete opening of the gas valve unit is achieved in that in a switching position adjacent to the zero position of the first magnetically active body formed by a ferromagnetic body opens the first permanent-magnet having a first on-off valve and the second magnetically active body formed by a permanent magnet a second Open-close valve opens.

In each switching position in which the second magnetically active body formed by a permanent magnet opens at least a second open-close valve, the first magnetically active body formed by a ferromagnetic body opens the first open-close valve having a permanent magnet. This ensures that in a dual-circuit gas burner at no time exclusively the outer Flame ring burns while the inner flame ring is not supplied with gas. Instead, the inner ring of flames always burns with the outer ring of flames.

In at least one switching position in which the second magnetically active body formed by a permanent magnet opens at least a first open-close valve, the first magnetic body does not open any of the open-close valves. In such a switching position, none of the second open-close valves is open. The first magnetically active body has no function in these switching positions.

Depending on the position of the second, magnetically active body formed by a permanent magnet, this second magnetically active body opens, either no on-off valve or exactly one on-off valve or exactly two open-close valves. No on-off valve opens the second magnetically active body in the zero position of the gas valve unit. Exactly one open-close valve opens the second magnetically active body when it is directly over the open-close valve. Exactly two open-close valves open the second magnetic active body in intermediate positions between two on-off valves. However, it is ensured that during the switching between two switching positions of the gas valve unit at any time all open-close valves are closed and thereby extinguish the flames on the gas burner.

In a preferred embodiment, the gas valve unit comprises a first throttle section, in which the first throttle points are arranged in series and each between two adjacent first throttle points have a connecting portion, which connects a first open-close valve in the open state with the gas inlet.

According to the invention, the gas valve unit comprises a second throttle section, in which the second throttle points are arranged in series and each between two adjacent throttle points has a connecting portion which connects a second open-close valve in the open state with the gas inlet.

The throttle points of the first throttle section have - viewed in the gas flow direction in the first throttle section - an increasing flow cross-section. As a result, the gas volume flow to the gas outlet is decisively determined only by the first throttle point located in the gas flow. In the gas flow direction subsequent throttle points have a larger flow cross-section and practically do not affect the volume flow,

Analogously, the throttling points of the second throttle section - viewed in the gas flow direction of the second throttle section - also have an increasing flow cross-section.

Figur 1

einen Zweikreis-Gasbrenner,

Figur 2

eine erfindungsgemäße Gasventileinheit als Zweikreis-Gasventil,

Figur 3

die Schaltstellung des geschlossenen Zweikreis-Gasventils,

Figur 4

die Schaltstellung des Zweikreis-Gasventils in einer ersten Schaltstellung

Figur 5

die Schaltstellung des Zweikreis-Gasventils zwischen einer ersten und einer zweiten Schaltstellung,

Figur 6

die Schaltstellung des Zweikreis-Gasventils in einer zweiten Schaltstellung,

Figur 7

die Schaltstellung des Zweikreis-Gasventils in einer sechsten Schaltstellung,

Figur 8

die Schaltstellung des Zweikreis-Gasventils in einer siebten Schaltstellung,

Figur 9

die Schaltstellung des Zweikreis-Gasventils zwischen einer siebten und einer achten Schaltstellung

Figur 10

die Schaltstellung des Zweikreis-Gasventils in einer achten Schaltstellung,

Figur 11

die Schaltstellung des Zweikreis-Gasventils in einer neunten Schaltstellung.

Further advantages and details of the invention will be explained in more detail with reference to the embodiment shown in the schematic figures.

FIG. 1

a two-circuit gas burner,

FIG. 2

a gas valve unit according to the invention as a two-circuit gas valve,

FIG. 3

the switching position of the closed two-circuit gas valve,

FIG. 4

the switching position of the two-circuit gas valve in a first switching position

FIG. 5

the switching position of the two-circuit gas valve between a first and a second switching position,

FIG. 6

the switching position of the two-circuit gas valve in a second switching position,

FIG. 7

the switching position of the two-circuit gas valve in a sixth switching position,

FIG. 8

the switching position of the two-circuit gas valve in a seventh switching position,

FIG. 9

the switching position of the two-circuit gas valve between a seventh and an eighth switch position

FIG. 10

the switching position of the two-circuit gas valve in an eighth switching position,

FIG. 11

the switching position of the dual-circuit gas valve in a ninth switching position.

Fig. 1 shows a dual-circuit gas burner 1, as it is commonly used in gas cooking. The two-circuit gas burner 1 comprises an inner burner 21 with first gas outlet openings 31, and an outer burner 22 with second gas outlet openings 32. The gas flows flowing through the first gas outlet openings 31 and the second gas outlet openings 32 and thus the flame sizes of a first flame ring on the inner burner 21 and a second Flame ring on the outer burner 22, can be adjusted separately. At minimum power of the two-circuit gas burner 1 21 flames are available only on the inner burner. At maximum power of the dual-circuit gas burner 1, both the inner burner 21 and the outer burner 22 flames are available. Between the Maximum power and the minimum power, the power of the dual-circuit gas burner 1 can be gradually reduced by, starting from the maximum power, the flame size at the outer burner 22 is first reduced until the outer burner 22 no more flame burns, and then the flame size at the inner burner 21 gradually reduced becomes.

Fig. 2 2 shows a gas valve unit according to the invention designed to supply such a two-circuit gas burner 1. The two-circuit gas valve 2 has a single gas inlet 3 which is located in the illustration behind a clamping plate 4 for fastening the two-circuit gas valve 2 to a gas line , the first gas outlet 11 is provided for connection to the internal burner 21 of the dual-circuit gas burner 1, while the second gas outlet 12 is provided for connection to the external burner 22 of the dual-circuit gas burner 1. The gas flow to the first gas outlet 11 is controlled by first on-off valves 15, the gas flow to the second gas outlet 12 by second open-close valves 16. To control the open-close valves 15, 16 are two magnetically active bodies 5, 6 provided.

The second magnetically active body 6 is formed by a permanent magnet, which can be moved about an axis 8, starting from the illustrated zero position in the counterclockwise direction. The first magnetically active body 5 is connected to the second magnetically active body 6 in such a way that it is moved together with the second magnetically active body 6 about the axis 8. The first magnetically active body 5 is made of a ferromagnetic material and is therefore not a permanent magnet. The characteristic feature of a ferromagnetic material is that it is not magnetic itself, but attracted by a magnet. In the present embodiment, the first magnetically active body 5 is formed of a C-shaped steel sheet and is in the Fig. 2 hatched transparent.

All second on-off valves 16 and all first on-off valves 15, with the exception of the first on-off valve 15.3, each have non-magnetic ferromagnetic valve body. The on-off valve 15.3 has a permanent-magnetic valve body, or a valve body connected to a permanent magnet 13. On the valve body of all first on-off valves 15, including the open-close valve 15.3, its permanent magnet 13 is poled accordingly, and all the open-close valves 16, the second magnetically active body 6 formed by a permanent magnet can exert an attraction force when it is positioned over the corresponding valve body.

The first magnetically active body 5 can exert an attractive force only on the valve body of the on-off valve 15.3, which is designed as a permanent magnet 13 or is coupled to such. This always takes place when a part of the first magnetically active body 5 is located above this open-close valve 15.3.

In the in Fig. 2 shown position, the second magnetically active body 6 is located next to the open-close valves 15, 16 so that it opens none of the open-close valves 15, 16. The first magnetically active body 5 is located next to the first on-off valve 15.3, so that this on-off valve 15.3 is not open. The dual-circuit gas valve 2 is thereby completely closed. Upon actuation of the dual-circuit gas valve 2, the magnetically active bodies 5, 6 are moved counterclockwise about the axis 8. The movement of the magnetic active body 5, 6 is always synchronous.

The circuit in the interior of the dual-circuit gas valve 2 will be described below with reference to the schematic FIGS. 3 to 11 explained in various switch positions. In each case, the first magnetically active body 5, the second magnetically active body 6, the first open-close valves 15 (15.1, 15.2, 15.3), the second open-close valves 16 (16.1 to 16.6), first throttle bodies can be seen 17 (17.1, 17.2, 17.3) and second throttling points 18 (18.1 to 18.6). When at least a first on-off valve 15 is opened, a first branch of the gas flow leads from the gas inlet 3 via this opened first on-off valve 15 and through at least one of the throttling points 17 to the first gas outlet 11 On-off valve 16 is opened, performs a second branch of the Gas flow from the gas inlet 3 via this open second on-off valve 16 and at least one of the second throttle points 18 to the second gas outlet 12. The first throttle bodies 17.1, 17.2 and 17.3 have three in turn - in the gas flow direction through the throttle points 17 of right to left - larger cross sections. The gas volume flow flowing to the first gas outlet 11 is decisively defined only by the first throttle point 17 located in the gas flow. If, for example, the open-close valve 15.1 is opened, in particular the throttle point 17.1 determines the size of the gas volume flow. When the first on-off valve 15.2 is opened, the throttle point 17.2 determines the gas volume flow, with the open-close valve 15.3 open, the gas volume flow through the throttle point 17.3 is determined. The last of the throttling points 17.3 can have such a large flow cross section that virtually no throttling of the gas volume flow takes place. The circuit and the operation of the second on-off valves 16 in conjunction with the second throttle bodies 18, in the leading to the second gas outlet 12 branch of the gas volume flow is analogous.

Fig. 3 shows the switching position of the closed two-circuit gas valve 1. In this switching position is the first magnetically active body 5 in the drawing to the left of the first open-close valve 15.3 and the second magnetically active body 6 in the drawing to the left of the second To-valves 16. This position of the magnetically active body 5, 6 corresponds to the in Fig. 2 illustrated switching position. Here, all open-close valves 15, 16 are closed by spring force. The gas present at the gas inlet 3 can flow neither to the first gas outlet 11 nor to the second gas outlet 12.

When the two magnetically active bodies 5, 6 coupled to one another, starting from the position according to FIG Fig. 3 , are moved to the right in the drawing, the formed of ferromagnetic material first magnetically active body 5 opens the equipped with a permanent magnet 13 first on-off valve 15.3 and designed as a permanent magnet second magnetically active body 6 opens the second open-end Valve 16.6.

This switch position is in FIG. 4 shown. In this case, the open first open-close valve 15.3 allows a maximum gas volume flow via the first throttle point 17.3 the first gas outlet 11. The opened second on-off valve 16.6 allows a maximum gas volume flow via the second orifice 18.6 to the second gas outlet 12th

In a further movement of the magnetically active body 5, 6 to the right in the drawing, the second magnetically active body 6 then additionally opens the second on-off valve 16.5. The movement of the first magnetically active body 5 to the right, however, does not lead to an opening of another first on-off valve 15.2 or 15.3, since they have no permanent magnet.

This switch position is in FIG. 5 shown. In this case, the majority of the gas flow reaching the second gas outlet 12 flows through the open on-off valve 16.6 and the throttle point 18.6. The gas flow through the open on-off valve 16.5 and the throttle restriction 18.5 is comparatively negligible. The reaching in this switching position to the second gas outlet 12 gas flow is virtually identical to the gas flow in the switching position according to Fig. 4 ,

When the magnetically active bodies 5, 6 are moved further to the right in the drawing, the on-off valve 16.6 closes and only the open-close valve 16.5 remains open.

This switch position is in FIG. 6 shown. For the function of the two-circuit gas valve is particularly important that during the switching from the open on-off valve 16.6 open on-open valve 16.5 in the meantime both open-close valves 16.6 and 16.5 are opened, as this is a continuous Gas flow ensures and prevents unwanted interruption of the gas flow and thus extinction of the gas flame during the switching process.

In the in Fig. 7 shown switching position, the open-close valves 15.3 and 16.1 are open. The leading to the first gas outlet 11 gas volume flow is maximum. On the other hand, the gas volume flow leading to the second gas outlet 12 is minimal since it flows through all the second throttle points 18.1 to 18.6 and is thus throttled to a maximum, in particular through the throttle point 18.1 with the smallest flow cross section.

FIG. 8 shows the next switching position of the gas valve unit, in which the second magnetically active body 6 is in the region of the first open-close valve 15.3. In this switching position, the second magnetically active body 6 exerts on none of the second open-close valves 16 a magnetic force, so that they are closed. By contrast, the second magnetically active body 6 now opens the first open-close valve 15.3 in that the second magnetically active body 6 formed by a permanent magnet attracts the permanent magnet 13. The permanent magnet 13 is for this purpose poled so that it is attracted to the second magnetically active body 6 and not repelled. In this switching position, the gas flow to the first gas outlet 11 as a result of the opened first on-off valve 15.3 is set to a maximum value, while the gas flow to the second gas outlet 12 is closed.

Now, if the two magnetically active body 5, 6 are moved further to the right, close and open successively the first open-close valves 15. This happens exclusively by means of the magnetic force of the second magnetically active body 6. The first magnetically active body 5 has These switching positions then no switching function.

This opens according to Fig. 9 initially additionally the first on-off valve 15.2, while the first open-close valve 15.3 remains open. The gas volume flow to the first gas outlet 11 is in this case virtually identical to the gas volume flow in the switching position according to FIG Fig. 8 ,

In contrast, according to the switching position Fig. 10 the gas volume flow to the first gas outlet 11 is reduced after the first on-off valve 15.3 is closed and only the first on-off valve 15.2 is opened by the second magnetically active body 6.

Fig. 11 finally shows the minimum position of the gas valve unit in which the second magnetically active body 6 opens the first open-close valve 15.1 and all other open-close valves 16, 15.2 and 15.3 are closed. The gas flow to the first gas outlet 11 in this case flows through all the first throttle points 17 and is thereby throttled maximum.

Upon actuation of the dual-circuit gas valve 2 in the reverse direction, the two magnetically active body 5, 6 are moved back. Again, the movement of the two magnetically active body 5, 6 is always synchronous. In this case, first the gas flow to the first gas outlet 11 and then the gas flow to the second gas outlet 12 increases. After the gas flow to both gas outlets 11, 12 has reached its maximum value, the two-circuit gas valve is completely closed in the subsequent switching position.

An actuation of the dual-circuit gas valve 2 by means of a suitable movement device. This can for example comprise a manually operable rotary knob. Rotation of the rotary knob then displaces the magnetically active body 5, 6 relative to the open-close valves 15, 16 in the manner described above.

Alternatively, it is also possible to equip the movement device with a suitable actuator, such as an electric stepper motor or a combination of electric motor and gearbox. This actuator can then be controlled by means of a suitable electronic control. The electronic controller then actuates the actuator automatically or in accordance with the output of an electronic user interface connected to the controller, which may be formed, for example, by touch sensors, sliders, or removable magnetic buttons. By means of the electronic control, a partially or fully automatic control of the gas valve unit can be realized.

LIST OF REFERENCE NUMBERS

1

Two-circuit gas burner

2

Two-circuit gas valve

3

gas input

4

clamping plate

5

first magnetically active body

6

second magnetically active body

8th

axis

11

first gas outlet

12

second gas outlet

13

permanent magnet

15 (15.1 to 15.3)

first on-off valves

16 (16.1 to 16.6.)

second on-off valves

17 (17.1 to 17.3)

first throttle points

18 (18.1 to 18.6)

second throttle points

21

internal burner

22

external burner

31

first gas outlet openings

32

second gas outlet openings

Claims (14)

1. Gas valve unit for setting gas volumetric flows to a twin-circuit gas burner of a gas appliance, in particular a gas cooking appliance, wherein the gas valve unit has a gas inlet (3) and a first and a second gas outlet (11, 12), wherein the gas volumetric flow to at least one of the gas outlets (12) can be set in a multiple-stage manner, in a zero position of the gas valve unit the gas volumetric flow to both gas outlets (11, 12) is interrupted and in a switching position adjacent to the zero position the gas volumetric flow, which can be set in a multiple-stage manner, is set to the at least second gas outlet (12) to a maximum value, characterised in that the gas valve unit for the setting in a multiple-stage manner of the gas volumetric flow fed to the at least second gas outlet (12) has at least two second open/close valves (16) and at least two second throttle points (18) and the gas valve unit comprises a second throttle section, in which the second throttle points (18) are arranged in series and each have a connecting segment located between two adjacent second throttle points, said connecting segment connecting one of the second open/close valves (16) to the gas inlet (3) in the opened state.
2. Gas valve unit according to claim 1, characterised in that in a switching position adjacent to the zero position the gas volumetric flow, which can be set in a multiple-stage manner, is set to a maximum value and the gas volumetric flow leading to the other gas outlet (11) is also opened.
3. Gas valve unit according to claim 1 or 2, characterised in that the gas volumetric flows to both gas outlets (11, 12) can be set in a multiple-stage manner, with both gas volumetric flows being set to a maximum value in a switching position adjacent to the zero position.
4. Gas valve unit according to one of claims 1 to 3, characterised in that to set the gas volumetric flow supplied to a first gas outlet (11) the gas valve unit has at least two first open/close valves (15) and at least two first throttle points (17), preferably at least three first open/close valves (15) and at least three first throttle points (17) and/or that to set the gas volumetric flow supplied to a second gas outlet (12) the gas valve unit has at least four second open/close valves (16) and at least four second throttle points (18).
5. Gas valve unit according to claim 4, characterised in that at least two magnetically active bodies (5, 6) are provided to control the open/close valves (15, 16), with a first magnetically active body (5) being formed by a ferromagnetic body and a second magnetically active body (6) being formed by a permanent magnet.
6. Gas valve unit according to claim 5, characterised in that the first magnetically active body (5) and the second magnetically active body (6) are coupled to one another in such a manner that they can be moved synchronously relative to the open/close valves (15, 16).
7. Gas valve unit according to claim 5 or 6, characterised in that at least one first open/close valve (15.3) has a permanent magnet (13), such that said first open/close valve (15.3) can be controlled as a function of the position of the first magnetically active body (5), which is formed by a ferromagnetic body.
8. Gas valve unit according to one of claims 5 to 7, characterised in that the first magnetically active body (5), which is formed by a ferromagnetic body, is embodied such that it brings about an opening of the open/close valve (15.3), which has a permanent magnet (13), in at least three switching positions of the gas valve unit.
9. Gas valve unit according to one of claims 5 to 8, characterised in that in a switching position adjacent to the zero position the first magnetically active body (5), which is formed by a ferromagnetic body, opens the first open/close valve (15.3), which has a permanent magnet (13), and the second magnetically active body (6), which is formed by a permanent magnet, opens a second open/close valve (16).
10. Gas valve unit according to one of claims 5 to 9, characterised in that in every switching position, in which the second magnetically active body (6), which is formed by a permanent magnet, opens at least one second open/close valve (16), the first magnetically active body (5), which is formed by a ferromagnetic body, opens the first open/close valve (15.3), which has a permanent magnet (13).
11. Gas valve unit according to one of claims 5 to 10, characterised in that in at least one switching position, in which the second magnetically active body (6), which is formed by a permanent magnet, opens at least one first open/close valve (16), the first magnetically active body (5) does not open any of the open/close valves (15, 16).
12. Gas valve unit according to one of claims 5 to 11, characterised in that depending on the position of the second magnetically active body (6), which is formed by a permanent magnet, said second magnetically active body (6) either does not open any open/close valve (15, 16) or opens just one open/close valve (15, 16) or opens just two open/close valves (15, 16)
13. Gas valve unit according to one of claims 4 to 12, characterised in that the gas valve unit comprises a first throttle section, in which the first throttle points (17) are disposed in a row, and have a connecting segment between each set of two adjacent first throttle points (17), which connects a first open/close valve (15) in the opened state to the gas inlet (3).
14. Gas valve unit according to claim 13, characterised in that the throttle points (17) of the first throttle section - when viewed in the gas flow direction in the first throttle section - have an increasing flow cross section and/or the throttle points (18) of the second throttle section - when viewed in the gas flow direction in the second throttle section - have an increasing flow cross section.

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