EP2652398B1 - Gas valve unit for a dual circuit burner - Google Patents

Description

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

Gas burners are often used in gas cooking appliances, which have two concentrically arranged rings with gas outlet openings. A flame ring can burn on each of the rings with gas outlet openings during operation of the gas hob. If the gas volume flows to the two rings with gas outlet openings can be set separately from one another, these gas burners are referred to as dual-circuit gas burners. Compared to conventional gas burners with only one flame ring, dual-circuit gas burners generally have a higher maximum combustion output. 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 greatest possible flames. With minimal burning power, only the smaller flame ring burns with the smallest possible flames, while no gas flows out of the larger ring with flame outlet openings.

Gas valve units for supplying two-circuit gas burners have a gas inlet with which the gas valve unit is connected to a main gas line of the gas cooking appliance. A first gas outlet of the gas valve unit opens into a first partial gas line leading to the smaller ring with gas outlet openings. A second gas outlet is connected to a second partial gas line leading to the larger ring with gas outlet openings. Such gas valve units are also referred to as two-circuit gas valves.

Two-circuit gas valves have a single actuating 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 common design of a two-circuit gas valve, starting from one is complete closed two-circuit gas valve, the gas flow to both flame rings immediately opened completely when the actuating element is actuated. Pressing the control element further reduces the output of the larger flame ring until it has completely extinguished. The output of the smaller flame ring is then reduced until it has reached its minimum output. Depending on the position of the actuating element, either the two-circuit gas valve is completely closed or only the gas flow to the smaller ring with gas outlet openings is opened or the gas flow to both rings with gas outlet openings is open. However, there is no provision to close the gas flow to the smaller ring with gas outlet openings, while the gas flow to the larger ring with gas outlet openings is open.

Known gas valve units for dual-circuit gas burners are generally designed as plug valves, in which a valve plug is rotated in a valve housing by means of the actuating element. In these known valves, the exact setting of a desired combustion performance and the reproducibility of such a setting proves to be difficult.

The WO 2009/064768 describes a gas stove with removable burners according to the prior art.

The DE 10249936 A1 . WO 99/11956 A1 . GB 2234044 A and EP 2189719 A2 disclose gas valve units according to the prior art.

The present invention is based on the object of providing a generic gas valve unit which is simple in construction and in which the adjustability is improved.

This object is achieved according to the invention in that the gas volume flow supplied to a first gas outlet can be set in several stages and in that the gas volume flow supplied to a second gas outlet can be set in multiple stages, the gas valve unit for adjusting the gas volume flow supplied to the first gas outlet being at least two first on-off valves and one first throttle section with at least two first throttle points which are arranged in series and which comprise an increasing flow cross-section in a gas flow direction in the first throttle section, and the gas valve unit for adjusting the gas volume flow supplied to the second gas outlet has at least two second open-close valves and a second one Throttle section with at least two second throttling points, which are arranged in series and which comprise an increasing flow cross section in a gas flow direction in the second throttle section, and wherein at least some of the open-close valves can be switched by means of magnetic force by positioning at least one magnetically active body and at least one first open-close Valve can be switched by means of a force acting mechanically on this first open-close valve, a movement device being provided for moving the magnetically active body relative to the open-close valves, and the movement device being a mechanical actuation device for the mechanically switchable first open-valve. To-valve includes. The gas valve unit forms several switching stages with which the gas flow to the first gas outlet and to the second gas outlet can be adjusted. The flow cross-section depends on which of the open-close valves are open. This in turn depends on which of the throttle points must be flowed through by the gas on the way from the gas inlet to the gas outlet. The gas valve unit has first open-close valves and first throttle points that are assigned to the first gas outlet, and second open-close valves and second throttle points that are assigned to the second gas outlet. According to the invention, some of the on-off valves can be actuated by means of magnetic force, in particular by moving a permanent magnet. The permanent magnet can be moved relative to the open-close valves and opens the open-close valve that is located directly in the magnetic field of the permanent magnet. In addition, at least one first open-close valve can be switched by means of a force acting mechanically on this open-close valve. This mechanically switchable on-off valve can also be opened when the permanent magnet is not in its vicinity.

Exactly one first open-close valve can preferably be switched by means of a force acting mechanically on this first open-close valve.

It is also advantageous if at least each of the non-mechanically actuated open-close valves can be switched by means of magnetic force by positioning the magnetically active body. This means that exactly one open-close valve can be switched mechanically and the other open-close valves can be switched by means of magnetic force. It is also possible that the mechanically switchable on-off valve can also be switched by means of magnetic force. The magnetically active body is particularly advantageously designed as a permanent magnet. Each of the on-off valves then has a movable valve body made of ferromagnetic material, which is movable by means of the force of the permanent magnet. The valve body is biased in the closed position by the force of a spring. If the permanent magnet is located directly above the valve body, the valve body moves into an open position against the spring force. It is also possible to design the valve body itself permanently magnetic or to connect it permanently to a permanent magnet, while the movable magnetically active body is formed from a non-magnetized ferromagnetic material.

A moving device is provided for moving the magnetically active body relative to the on-off valves. The movement device can, for example, be operated by an operator by hand using a rotary knob. It is also possible to couple the movement device to an electrical actuator, for example a stepper motor. With the movement device, the magnetically active body can be moved along the open-close valves on a defined path.

The movement device is preferably designed in such a way that, by actuating the movement device, starting from a completely closed gas valve unit, by means of the magnetically active body, the open-close valves assigned to the second gas outlet are actuated first and then, by means of the magnetically active body, the valves assigned to the first gas outlet Open-close valves are operated. This means that the gas volume flow to the external burner of the two-circuit gas burner connected to the second gas outlet is first controlled by means of the permanent magnet. Then, when the volume flow to the external burner is completely interrupted, the magnetically active body controls the opening cross section to the internal burner of the dual-circuit gas burner connected to the first gas outlet.

The movement device further comprises a mechanical actuation device for the mechanically switchable first open-close valve. With the mechanical actuation device, the mechanically switchable first open-close valve can be opened even if the magnetically active body is not in the vicinity of this first on-off valve.

Here, the movement device is designed such that when at least one second open-close valve is opened by means of magnetic force, the mechanically switchable first open-close valve is opened by means of the mechanical actuation device. Whenever the gas flow to the second gas outlet and thus to the external burner of the dual-circuit gas burner is opened, the mechanical actuation device also opens the gas flow to the first gas outlet and thus to the internal burner.

Furthermore, the movement device is designed such that when the magnetically active body is positioned in such a way that it exerts a magnetic force acting in the opening direction on the mechanically switchable first open-close valve, this mechanically switchable first open-close valve also by means of the mechanical actuator is open. In the switch position mentioned, this mechanically switchable first on-off valve is opened both mechanically and by means of magnetic force. This avoids undefined switching states.

Furthermore, the movement device is designed such that when the magnetically active body is positioned such that it exerts a magnetic force acting in the opening direction only on at least one non-mechanically switchable first open / close valve, the mechanically switchable first open / close valve is also not opened by means of the mechanical actuation device. In such a switching position, in which the flow cross-section to the first gas outlet is set to a value which is less than the maximum value by means of the magnetic force, the mechanical actuation device has no effect.

Depending on the position of the magnetically active body, either no open-close valve or exactly one open-close valve or exactly two open-close valves are opened by means of magnetic force. No open-close valve is open when the movement device is in the zero position. The magnetically active body opens exactly one open-close valve when it is located directly above this open-close valve. In intermediate positions, when the magnetically active body is between two open-close valves, these two open-close valves are open. This prevents the gas flow from being completely interrupted briefly during the switchover and the flames on the gas burner thereby extinguishing.

According to a constructive embodiment of the invention, a movable valve body of the mechanically switchable first open-close valve has a cylindrical base body and a driver. The cylindrical base body is guided in a cylindrical bore in a housing of the gas valve unit. The mechanical actuating device can exert a force on the cylindrical base body via the driver and move it.

The driver preferably protrudes from the base body in the circumferential direction. The driver can, for example, be annular and have a larger circumference than the base body.

The mechanical actuation device of the movement device has a movable cam which exerts a force on the driver as a function of the switching position of the movement device. The cam can be made so long that it opens the mechanically switchable open-close valve over several switching positions of the movement device.

According to the invention, the gas valve unit comprises a first throttle section, in which the first throttle points are arranged in series and each have a connecting section between two adjacent first throttle points, which connects a first open-close valve to the gas inlet in the open state. The choke points are located one behind the other and are arranged in a row. Depending on which open-close valve is open, the gas flow leads through one, two or more throttling points.

Analogously to this, the gas valve unit according to the invention comprises a second throttle section, in which the second throttle points are arranged in series and each have a connecting section between two adjacent second throttle points, each of which connects a second open-close valve in the open state to the gas inlet.

According to the invention, the throttling points of the first throttling section have an increasing flow cross section — viewed in the gas flow direction in the first throttling section. Analogously to this, the throttle points in the second throttle section - viewed in the gas flow direction in the second throttle section - have an increasing flow cross section. The throttle point that follows the open on-off valve in the gas flow direction thus primarily determines the gas volume flow to the gas outlet in question. The throttling points following in the throttle section have a larger flow cross-section and have a comparatively lower throttling effect on the gas volume flow.

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

Figur 1

einen Zweikreis-Gasbrenner,

Figur 2

die Schaltstellung des geschlossenen Zweikreis-Gasventils,

Figur 3

die Schaltstellung des Zweikreis-Gasventils in einer ersten Schaltstellung,

Figur 4

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

Figur 5

die Schaltstellung des Zweikreis-Gasventils in einer sechsten Schaltstellung,

Figur 6

die Schaltstellung des Zweikreis-Gasventils in einer siebten Schaltstellung,

Figur 7

die Schaltstellung des Zweikreis-Gasventils in einer neunten Schaltstellung,

Figur 8

eine Schnittdarstellung des geschlossenen Zweikreis-Gasventils,

Figur 9

eine Schnittdarstellung des Zweikreis-Gasventils in einer weiteren Schaltstellung.

It shows

Figure 1

a two-circuit gas burner,

Figure 2

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

Figure 3

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

Figure 4

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

Figure 5

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

Figure 6

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

Figure 7

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

Figure 8

2 shows a sectional illustration of the closed two-circuit gas valve,

Figure 9

a sectional view of the two-circuit gas valve in a further switching position.

Fig. 1 shows a two-circuit gas burner 1, as is usually used in gas hobs. The dual-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 volume flows emerging 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 set separately. At minimum output of the two-circuit gas burner 1, only 21 flames are present on the inner burner. At maximum output of the dual-circuit gas burner 1, flames are present both on the inner burner 21 and on the outer burner 22. Between the minimum power and the maximum power, the power of the dual-circuit gas burner 1 can be gradually reduced by first starting with the maximum power at which the outer burner 22 and the inner burner 21 burn at maximum power, the flame size on the outer burner 22 is gradually reduced until the External burner 22 is completely extinguished, and then the flame size on the inner burner 21 is gradually reduced until a minimum flame size is reached.

The Figures 2 to 7 schematically show a gas valve unit according to the invention, designed as a two-circuit gas valve 2, for supplying such a two-circuit gas burner 1. The two-circuit gas valve 2 has a single gas inlet 3, a first gas outlet 11 and a second gas outlet 12. The first gas outlet 11 is provided for connection to the inner burner 21 of the two-circuit gas burner 1, while the second gas outlet 12 is provided for connection to the outer burner 22 of the two-circuit gas burner 1 is provided. The gas flow to the first gas outlet 11 is controlled by first open-close valves 15 (15.1 to 15.3), the gas flow to the second gas outlet 12 by second open-close valves 16 (16.1 to 16.6). A magnetically active body 5 and a non-magnetic cam 6 connected to it are provided to control the open-close valves 15, 16.

All second open-close valves 16 and all first open-close valves 15 each have non-magnetic ferromagnetic valve bodies. The open-close valve 15.3 additionally has a driver 7 connected to the valve body. The first open-close valve 15.3 can be actuated by the cam 6 via this driver 7. The magnetically active body 5, formed by a permanent magnet, can exert an attractive force on the valve body of all the first open-close valves 15, including the open-close valve 15.3, and all the second open-close valves 16, when it is above the corresponding valve body is positioned.

The basic structure of the gas valve according to the invention, in particular the type of interaction of the magnetically active body 5 with the associated open-close valves 15 and 16 and the gas routing inside the gas valve, corresponds to the structure of the subjects of the European patent applications filed on July 27, 2009 09290589.2 . 09290590.0 and 09290591.8 and the German patent application filed on May 20, 2010 10290271.5 ,

In the in Fig. 2 In the position shown, the magnetically active body 5 is located next to the open-close valves 15, 16, so that it does not open any of the open-close valves 15, 16. The cam 6 is located next to the first open-close valve 15.3, so that this open-close valve 15.3 is also not open. The two-circuit gas valve 2 is thus completely closed. When the two-circuit gas valve 2 is actuated, the magnetically active body 5 is moved to the right in the drawing. The movement of the cam 6 is always synchronous.

The circuit inside the two-circuit gas valve 2 is described below using the schematic Figures 2 to 7 explained in different switching positions. The magnetically active body 5, the cam 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 throttling points 17 (17.1, 17.2, 17.3) and second throttling points 18 (18.1 to 18.6). If at least one first open-close valve 15 is open, a first branch of the gas flow leads from the gas inlet 3 via this opened first open-close valve 15 and through at least one of the throttle points 17 to the first gas outlet 11. If at least a second one When the open-close valve 16 is open, a second branch of the gas flow leads from the gas inlet 3 via this open second open-close valve 16 and through at least one of the second throttle points 18 to the second gas outlet 12. The first throttle points 17.1, 17.2 and 17.3 have three cross sections that increase in size — viewed in the gas flow direction through the throttle points 17 from right to left. The gas volume flow flowing to the first gas outlet 11 is essentially only defined by the first throttle point 17 located in the gas flow. If, for example, the open-close valve 15.1 is open, the throttle point 17.1 in particular determines the size of the gas volume flow. When the first open-close valve 15.2 is open, the throttle point 17.2 determines the gas volume flow; when the open-close valve 15.3 is 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 there is practically no further throttling of the gas volume flow. The circuit and the mode of operation of the second open-close valves 16 in connection with the second throttle points 18 in the branch of the gas volume flow leading to the second gas outlet 12 are analogous.

Fig. 2 shows the switching position of the closed two-circuit gas valve 1. In this switching position, the magnetically active body 6 is located in the drawing to the left of the second open-close valves 16. The cam 6 is not in engagement with the driver 7. All openers To valves 15, 16 are closed by means of spring force. The gas present at the gas inlet 3 can neither flow to the first gas outlet 11 nor to the second gas outlet 12.

When the magnetically active body 5 and the cam 6, starting from the position according to Fig. 2 , after being moved to the right in the drawing, the cam 6 opens the first on-off valve 15.3 and by means of a force exerted mechanically on the driver 7 the magnetically effective body 5, designed as a permanent magnet, opens the second open-close valve 16.6.

This switch position is in Figure 3 shown. The open first open-close valve 15.3 enables a maximum gas volume flow via the first throttle point 17.3 to the first gas outlet 11. The opened second open-close valve 16.6 enables a maximum gas volume flow via the second throttle point 18.6 to the second gas outlet 12.

When the magnetically active body 5 moves further to the right in the drawing, the magnetically active body 5 then additionally opens the second on-off valve 16.5. In contrast, the movement of the cam 6 to the right does not lead to the opening of a further first open-close valve 15.2 or 15.3, since these have no driver.

This switch position is in Figure 4 shown. The major part 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 added through the open on-off valve 16.5 and the throttle point 18.5 is comparatively negligible. The gas volume flow reaching the second gas outlet 12 in this switching position is practically identical to the gas volume flow in the switching position shown in FIG Fig. 4 ,

If the magnetically active body 5 and the cam 6 are moved further to the right in the drawing, the open-close valve 16.6 closes and only the open-close valve 16.5 remains open.

For the function of the two-circuit gas valve, it is particularly important that both open-close valves 16.6 and 16.5 are temporarily open during the switchover from the open open-close valve 16.6 to the open open-close valve 16.5, since this is a continuous one Gas flow guaranteed and an unwanted interruption of the gas flow and thus extinguishing the gas flames prevented during the switching process.

In the in Fig. 5 Switch position shown, the open-close valves 15.3 and 16.1 are open. The gas volume flow leading to the first gas outlet 11 is at a maximum. In contrast, the gas volume flow leading to the second gas outlet 12 is minimal, since it flows through all the second throttling points 18.1 to 18.6 and is thereby throttled to a maximum, in particular through the throttling point 18.1 with the smallest flow cross section.

Figure 6 shows the next switching position of the gas valve unit, in which the magnetically active body 5 is located in the region of the first open-close valve 15.3. In this switching position, the magnetically active body 5 does not exert a magnetic force on any of the second open-close valves 16, so that they are closed. On the other hand, the magnetically active body 5 now opens the first open-close valve 15.3 by attracting a valve body of the first open-close valve 15.3. At the same time, the cam 6 also exerts a mechanical opening force on the valve body of the first open-close valve 15.3 via the driver 7. In this switch position, the gas flow to the first gas outlet 11 is set to a maximum value as a result of the opened first open-close valve 15.3, while the gas flow to the second gas outlet 12 is interrupted.

If the magnetically active body 5 is now moved further to the right, the first open-close valves 15 close and open in succession. For the first open-close valves 15.1 and 15.2, this occurs exclusively by means of the magnetic force of the magnetically active body 5. The Cam 6 has no switching function for the first open-close valves 15.1 and 15.2.

Fig. 7 finally shows the minimum position of the gas valve unit, in which the magnetically active body 5 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 flows through all the first throttling points 17 and is thereby throttled to a maximum.

When the two-circuit gas valve 2 is actuated in the opposite direction, the magnetically active body 5 and the cam 6 are moved back. Again, the movement of the magnetically active body 5 and the cam 6 is always synchronous. The gas flow to the first gas outlet 11 and 12 then increases then the gas flow to the second gas outlet 12. 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.

The two-circuit gas valve 2 is actuated by means of a suitable movement device. This can include, for example, a manually operated rotary knob. Rotation of the rotary toggle then shifts the magnetically active body 5 and the cam 6 relative to the on-off valves 15, 16 in the manner described above.

Alternatively, it is also possible to equip the movement device with a suitable actuator, for example an electric stepper motor or a combination of an electric motor and gear. This actuator can then be controlled by means of a suitable electronic control. The electronic control then actuates the actuator automatically or according to the output signal of an electronic user interface connected to the control, which can be formed, for example, by touch sensors, sliders or removable magnetic knobs. A partially or fully automatic control of the gas valve unit can also be implemented by means of the electronic control.

In Figure 8 is a sectional view of the gas valve unit according to the invention designed as a two-circuit gas valve 2 is shown in the closed state. A housing 35 of the two-circuit gas valve 2 can be seen with an actuating shaft 36 protruding from the housing 35 Figure 9 ) and transferred for the cam 6. An electrical switch 42 arranged outside the housing 35 detects that the actuating shaft 36 is pressed in axially and generates a corresponding signal.

In the sectional view according to Figure 8 the mechanically and magnetically actuable first open-close valve 15.3 and the second open-close valve 16.5 are visible. Both open-close valves 15.3 and 16.5 are in the closed state. Their valve bodies 39.3 and 40.5 are pressed against a valve seat by means of the force of the springs 41. The Cam 6 is in a position in which it is not in engagement with a driver 7 arranged on valve body 39.3. The magnetically active body 5 does not exert a magnetic force on any of the valve bodies 39.3, 40.5.

Figure 9 shows a sectional view of the two-circuit gas valve in a further switching position. Here the actuating shaft 36 and with it the movement device 37 is rotated into a position in which the cam 6 of the movement device 37 pulls the valve body 39.3 downward against the force of the spring 41 via the driver. The open-close valve 15.3 is thereby opened.

In the area of the open-close valve 16.5 there is the magnetically active body 5 designed as a permanent magnet. The magnetic force of the magnetically active body 5 pulls the valve body 40.5 downward against the force of the spring 41. Thus the open-close valve 16.5 is also open.

LIST OF REFERENCE NUMBERS

1

Two-circuit gas burner

2

Two-circuit gas valve

3

gas input

5

magnetically effective body

6

cam

7

takeaway

11

first gas outlet

12

second gas outlet

15 (15.1 to 15.3)

first on-off valves

16 (16.1 to 16.6.)

second open-close valves

17 (17.1 to 17.3)

first throttling points

18 (18.1 to 18.6)

second throttling points

21

internal burner

22

external burner

31

first gas outlet openings

32

second gas outlet openings

35

casing

36

actuating shaft

37

mover

38

coupling member

39.3

Valve body of a first open-close valve

40.5

Valve body of a second open-close valve

41

feather

42

electrical switch

Claims (8)

1. Gas valve unit for adjusting gas volume flows to a dual circuit gas burner (1) of a gas appliance, in particular of a gas cooking appliance, wherein the gas valve unit has one gas inlet (3) and two gas outlets (11, 12), wherein the gas volume flow fed to the one first gas outlet (11) can be adjusted in multiple stages, wherein the gas volume flow fed to the one second gas outlet (12) can be adjusted in multiple stages, characterised in that the gas valve unit has at least two first on-off valves (15) for adjusting the gas volume flow fed to the first gas outlet (11) and one first throttle section with at least two first throttle points (17), which are arranged in series and which comprise an increasing flow cross-section in a gas flow direction in the first throttle section and the gas valve unit has at least two second on-off valves (16) for adjusting the gas volume flow fed to the second gas outlet (12) and a second throttle section with at least two second throttle points (18), which are arranged in series and which comprise an increasing flow cross-section in a gas flow direction in the second throttle section, that at least some of the on-off valves (15, 16) are switchable by means of magnetic force by way of the positioning of at least one magnetically active body (5, 6) and at least one first on-off valve (15.3) is switchable by means of a force acting mechanically on this first on-off valve (15.3), that a movement device (37) is provided for moving the magnetically active body (5) relative to the on-off valves (15, 16) and that the movement device (37) comprises a mechanical actuating device for the mechanically switchable first on-off valve (15.3).
2. Gas valve unit according to claim 1, characterised in that exactly one first on-off valve (15.3) is switchable by means of a force acting mechanically on this first on-off valve (15.3).
3. Gas valve unit according to claim 1 or 2, characterised in that at least each of the on-off valves (15, 16) that is not able to be mechanically actuated is switchable by means of magnetic force through the positioning of the magnetically active body (5, 6).
4. Gas valve unit according to one of claims 1 to 3, characterised in that the magnetically active body (5) is embodied as a permanent magnet.
5. Gas valve unit according to one of claims 1 to 4, characterised in that the movement device (37) is embodied such that by way of actuation of the movement device (37) from a completely closed gas valve unit, the on-off valves (16) assigned to the second gas outlet (12) are firstly actuated by means of the magnetically active body (5) and then the on-off valves (15) assigned to the first gas outlet are actuated by means of the magnetically active body (5).
6. Gas valve unit according to one of claims 1-5, characterised in that the movement device (37) is embodied such that if at least one second on-off valve is opened by means of magnetic force, the mechanically switchable first on-off valve (15.3) is opened by means of the mechanical actuation device.
7. Gas valve unit according to one of claims 1-6, characterised in that the movement device (37) is embodied such that if the magnetically active body (5) is positioned in such a way that it exerts a magnetic force acting in the opening direction onto the mechanically switchable first on-off valve (15.3), this mechanically switchable first on-off valve (15.3) is also opened by means of the mechanical actuation device.
8. Gas valve unit according to one of claims 1 to 7, characterised in that the movement device (37) is embodied such that if the magnetically active body (5) is positioned in such a way that it exerts a magnetic force acting in the opening direction exclusively onto at least one non-mechanically switchable first on-off valve (15.3), the mechanically switchable first on-off valve (15.3) is also not opened by means of the mechanical actuation device.

Images