EP3102879B1 - Gas shut-off valve, gas burner assembly, cooking hob, and stove - Google Patents

Description

The present invention relates to a gas shut-off valve, a gas burner assembly, a cooking station and a stove.

A hotplate can have a plurality of gas burners, each gas burner can be assigned its own gas control valve. For heating a Gargutgefäßes this is placed on a pot carrier of a respective gas burner. When lifting the Gargutgefäßes the gas burner burns on.

The FR 2 662 236 A1 describes a Gasabschaltventil for a gas burner. The gas shut-off valve has an actuating element, which is pressed down when stopping a Gargutgefäßes on the gas burner and so lifts a valve body of a valve seat. As a result, a fuel gas flow is released to the gas burner. When lifting the Gargutgefäßes of the gas burner, the valve body is pressed by means of a spring device on the valve seat and thus closes the gas supply to the gas burner. The gas burner thus extinguishes immediately when lifting the Gargutgefäßes.

The GB 1 565 682 A describes a Gasabschaltventil for a gas burner. When lifting a Gargutgefäßes of the gas burner, the fuel gas supply to the gas burner is interrupted with a time delay.

The JP S56 42774 A describes a gas shut-off valve with a liquid damper.

The EP 0 731 317 A1 describes a gas hob with a pan detection system. When lifting a Gargutgefäßes from the gas hob, the fuel gas supply switches off to the gas hob.

The US 4,681,084 A describes a gas hob with a Gasabschaltventil. The gas hob includes a pan detection system. When lifting a Gargutgefäßes from the gas hob, the gas shut-off valve is closed with a time delay.

The EP 2 187 131 A1 describes a gas hob with a pan detection system. When lifting a Gargutgefäßes from the gas hob, the fuel gas supply switches off to the gas hob.

The WO 98/50736 A1 also describes a gas hob with a pan detection system. When lifting a Gargutgefäßes from the gas hob, the fuel gas supply to the gas hob switches off with a time delay.

Against this background, an object of the present invention is to provide an improved gas shutoff valve.

Accordingly, a gas shut-off valve for a gas burner, which is optionally brought into an open or closed state, proposed with a delay device which is adapted to delay a movement of the Gasabschaltventils from the open state to the closed state, wherein the gas shutoff valve is an actuating element, which is displaceable for selectively opening or closing the gas shutoff valve from an open position to a closed position, and comprises a spring device by means of which the actuating element is biased in the direction of the closed position, wherein the delay device is adapted to an automatic displacement of the actuating element by means of the spring means to decelerate from the open position to the closed position and wherein the deceleration device is a gas damper.

The gas shut-off valve may be a solenoid valve. In particular, the gas shut-off valve may have a sensor or detection device which is adapted to detect a Gargutgefäß which is arranged on a gas shutoff valve associated cooking. For example, the detection device can enable electronic Gargutgefäßerkennung. For this purpose, the detection device can have, for example, an optical sensor. Alternatively, the detection of the Gargutgefäßes done mechanically. In this case, the identification device can be designed as a mechanical actuating element of the gas shut-off valve. Once the Gargutgefäß is removed from the hob, this is registered by the gas shut-off valve and in particular the detection device and the gas shut-off valve is moved from the open to the closed state. The delay device in this case delays the movement of the gas shut-off valve from the open to the closed state, so that the gas shut-off valve remains in the open state for a predetermined time interval when the cooking product vessel is removed. This prevents that a burner flame of the gas burner extinguished immediately when removing the Gargutgefäßes.

The gas shut-off valve comprises an actuating element, which is displaceable for selectively opening or closing the gas shut-off valve from an open position to a closed position, and a spring device, by means of which the actuating element is biased in the direction of a closed position. The delay device is adapted to delay an automatic displacement of the actuating element by means of the spring device from the open position to the closed position.

In particular, the delay device is adapted to delay the automatic displacement of the actuating element from the open position to the closed position by a predetermined time interval. In the open position, fuel gas may flow through the gas shut-off valve. In the closed position, no fuel gas can flow through the gas shut-off valve. The predetermined time interval may be, for example, more than one second, preferably more than two seconds, more preferably more than five seconds. In particular, with the aid of the delay device, a movement of the actuating element from the open position into the closed position is slowed down such that fuel gas continues to flow through the gas shut-off valve for the predetermined time interval. The fuel gas can also flow through the gas shut-off valve, while this closes slowly by means of the delay device. Due to the fact that the delay device is provided, the flame of the gas burner does not extinguish immediately upon brief lifting of the cooking vessel from the gas burner. This can be dispensed with a renewed ignition of the gas burner in a short-term lifting the Gargutgefäßes of the gas burner.

According to a further embodiment, the deceleration device dampens a movement of the actuating element during the displacement of the same from the closed position to the open position.

The delay device may be a damping element. In particular, the delay device slows down the movement of the actuating element when moving from the closed position to the open position.

According to a further embodiment, the actuating element has a support surface for a Gargutgefäß.

The bearing surface is in particular an end face of the actuating element. The support surface is preferably flat.

According to a further embodiment, the actuating element is rod-shaped.

The actuating element preferably has a circular cross-section. The actuator may also have an oval or polygonal cross-section. In particular, a central axis of the actuating element is arranged parallel to a central axis of the gas burner.

The deceleration device is a gas damper.

As a result, a cost-effective and simple construction of the delay device is possible. This reduces the cost of manufacturing the gas shutoff valve. A gas damper is particularly insensitive to heat.

According to a further embodiment, the delay device has a first gas chamber provided on the actuating element and a second gas chamber provided on a valve housing of the gas shut-off valve, which is fluidically connected to the first gas chamber via a nozzle.

The nozzle is in particular a throttle point. Through a diameter of the nozzle, the damping or delay characteristics of the delay device can be adjusted. The provided on the actuating element first gas chamber is preferably an actuating element annular circumferential groove. The second gas chamber is provided as a recess in the valve housing.

According to a further embodiment, the actuating element for displacing from the closed position into the open position can be loaded with a Gargutgefäß. Further, when lifting the Gargutgefäßes of the actuating element, the actuating element by means of the spring device displaced automatically from the open position to the closed position.

As a result, the gas supply is switched off at a longer lifting the Gargutgefäßes. With the help of the delay device prevents the gas supply is interrupted when briefly lifting the Gargutgefäßes of the gas burner.

According to a further embodiment, a center axis of the actuating element when displacing the same from the open position to the closed position or vice versa is arranged parallel to a center axis of the gas burner.

The actuating element is preferably linearly displaceable relative to the valve housing. The actuating element is in particular displaceable into or out of a valve housing of the gas shut-off valve.

Furthermore, a gas burner arrangement for a hotplate with a gas burner, a gas control valve such a gas shut-off valve and a gas supply line is proposed. The gas supply connects the gas control valve with the gas shut-off valve and the gas shut-off valve with the gas burner.

The gas shut-off valve is preferably arranged downstream of the gas control valve. The gas control valve is configured to control a fuel gas volume flow to the gas burner. In contrast, the gas shutoff valve is to configured to selectively release or interrupt the fuel gas flow to the gas burner.

According to a further embodiment, the gas burner arrangement has a pot carrier for depositing a Gargutgefäßes.

As a result, can be dispensed with a pot carrier as another component.

According to a further embodiment, the pot carrier has the actuating element of the gas shut-off valve.

As a result, the gas shut-off valve can be opened by placing a food container on the pot carrier.

According to a further embodiment, a bearing surface of the actuating element and a respective bearing surface of spacers of the pot carrier form a common bearing surface of the pot carrier.

The spacers are preferably rod-shaped. Preferably, the spacers and the actuating element are arranged distributed around the gas burner annular. In particular, the spacers and the actuator are spaced uniformly around the gas burner. On the common support surface, a Gargutgefäß be turned off.

According to a further embodiment, a frame of the pot carrier is integral with a valve housing of the gas shut-off valve.

As a result, individual parts can be saved. Furthermore, a simple production of the frame with the valve housing is possible.

Furthermore, a cooking station with such a gas shut-off valve and / or such a gas burner arrangement is proposed.

Furthermore, a stove is proposed with such a gas shut-off valve, such a gas burner arrangement and / or such a cooking place.

The gas shut-off valve, the gas burner assembly, the hob and the stove are suitable for use in the home.

Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments described above or below with regard to the exemplary embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the invention.

• Fig. 1 zeigt eine schematische perspektivische Ansicht einer Ausführungsform einer Kochstelle;
• Fig. 2 zeigt in einer schematischen Aufsicht die Kochstelle gemäß der Fig. 1;
• Fig. 3 zeigt in einer schematischen perspektivischen Ansicht eine Ausführungsform einer Gasbrenneranordnung der Kochstelle gemäß der Fig. 1;
• Fig. 4 zeigt in einer schematischen perspektivischen Explosionsansicht eine Ausführungsform eines Topfträgers der Kochstelle gemäß der Fig. 1;
• Fig. 5 zeigt in einer schematischen Schnittansicht die Gasbrenneranordnung gemäß der Fig. 3;
• Fig. 6 zeigt in einer schematischen Schnittansicht eine Ausführungsform eines Gasabschaltventils der Gasbrenneranordnung gemäß der Fig. 3; und
• Fig. 7 zeigt in einer weiteren schematischen Schnittansicht das Gasabschaltventil gemäß der Fig. 6.

Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the embodiments of the invention described below. Furthermore, the invention will be explained in more detail by means of preferred embodiments with reference to the attached figures.

• Fig. 1 shows a schematic perspective view of an embodiment of a cooking area;
• Fig. 2 shows in a schematic plan view of the hotplate according to the Fig. 1 ;
• Fig. 3 shows a schematic perspective view of an embodiment of a gas burner arrangement of the cooking position according to the Fig. 1 ;
• Fig. 4 shows a schematic perspective exploded view of an embodiment of a pot carrier of the cooking position according to the Fig. 1 ;
• Fig. 5 shows in a schematic sectional view of the gas burner assembly according to the Fig. 3 ;
• Fig. 6 shows a schematic sectional view of an embodiment of a Gasabschaltventils the gas burner assembly according to the Fig. 3 ; and
• Fig. 7 shows in a further schematic sectional view of the gas shut-off valve according to the Fig. 6 ,

In the figures, the same or functionally identical elements have been given the same reference numerals, unless stated otherwise.

The Fig. 1 shows a schematic perspective view of a cooker 1 with a hob 2. The stove 1 is a household appliance. The stove 1 is in particular a gas stove. The hob 2 has a trough-shaped cooking 3. The hob 3 is made for example of a steel sheet. The hob 3 can with a in the Fig. 1 Be covered cooking plate not shown. The cooking station 2 has a plurality of gas burner arrangements 4-7. The number of gas burner arrangements 4-7 is arbitrary. Like in the Fig. 1 2, the cooking station 2 may have four gas burner assemblies 4-7.

The Fig. 2 shows the stove 1 in a plan. Each of the gas burner arrangements 4 - 7 has a pot support 8 for parking a Gargutgefäßes not shown. Further, each gas burner assembly 4 - 7, a gas burner 9 and a gas control valve 10 which is provided with an actuating knob 11, on. The gas control valve 10 is adapted to control a fuel gas volume flow to the respective gas burner 9. Furthermore, each gas burner arrangement 4 - 7 has a gas shut-off valve 12. Furthermore, each gas burner arrangement 4 - 7 comprises a gas feed line 13 which fluidly connects the gas control valve 10 to the gas shut-off valve 12 and the gas shut-off valve 12 to the gas burner 9.

The Fig. 3 shows in a schematic perspective view of the gas burner assembly 4. The gas control valve 10 is connected to a main gas line 14 of the cooking zone 2. The gas shut-off valve 12 is positioned between the gas burner 9 and the gas control valve 10. The gas shut-off valve 12 has a, in particular rod-shaped actuating element 15. The actuating element 15 preferably has a circular cross-section. The pot carrier 8 comprises the actuating element 15, a frame 16 and at least two spacers 17, 18. The frame 16 is preferably annular. From an upper side of the frame 16, the spacers 17, 18 and the actuating element 15 extend out. An end face or Support surface 19 of the actuating element 15 and a respective support surface 20, 21 of the spacers 17, 18 form a common bearing surface AF of the pot carrier. 8

The Fig. 4 shows in a schematic exploded view of the gas shut-off valve 12 with the pot carrier 8. The gas shut-off valve 12 has a valve housing 22, which is preferably formed integrally with the frame 16 of the pot carrier. The valve housing 22 preferably has a first connection flange 23 for connecting the gas supply line 13 to the gas shut-off valve 12 and a second connection flange 24 for connecting the gas burner 9. In this case, the connection flange 24 points in the direction of a center point of the annular frame 16 of the pot carrier 8. An adapter 25 for connecting the valve housing 22 of the gas shut-off valve 12 to the gas burner 9 can be provided on the second connection flange 24.

The gas shut-off valve 12 also has the actuating element 15. The actuating element 15 is preferably rod-shaped with a circular cross-section. On the actuating element 15, a circumferential annular groove is provided, which forms a first gas chamber 26 of a delay device 27 of the Gasabschaltventils 12. The delay device 27 has, in addition to the first gas chamber 26, a second gas chamber 28 provided on the valve housing 22 of the gas shut-off valve 12. The second gas chamber 28 is provided as a recess in the valve housing 22. The gas chambers 26, 27 are fluidly connected to one another via a nozzle 29 provided in the valve housing 22.

The delay device 27 is in particular a gas damper. The gas chamber 28 is covered by means of a cover 30. The cover 30 has a bore 31 through which the actuator 15 is passed. In particular, the bore 31 is in contact with the actuating element 15 in the area of the first gas chamber 26. For this purpose, the cover 30 may be made in several parts for mounting or be elastically deformable.

Between the cover 30 and the valve housing 22, a sealing device 32 is provided. The sealing device 32 may be, for example, a sealing ring. The gas shut-off valve 12 also has a cap 33, which serves the conclusion relative to a hob plate of the cooking zone 2.

In the valve housing 22 a arranged between the valve housing 22 and the actuator 15 spring means 34 is provided. The spring device 34 is for example a helical or cylindrical spring. Below the first gas chamber 26 extends radially through the actuating element 15 has a bore 35 therethrough. Fuel gas flows through the bore 35 in the open position of the actuating element 15.

The pot carrier 8 has, in addition to the gas shut-off valve 12, the two spacers 17, 18. The spacers 17, 18 are preferably screwed into the annular frame 16 of the pot carrier 8. For this purpose, corresponding receiving bores 36, 37 may be provided on the frame, which are designed in particular as threaded bores. At the spacers 17, 18 corresponding threads 38, 39 may be provided which are adapted to screw the spacers 17, 18 with the frame 16. Preferably, the spacers 17, 18 and the actuator 15 are evenly distributed around a circumference of the annular frame 16 of the pot carrier 8.

The Fig. 5 shows a schematic sectional view of the gas burner assembly 4 with the gas burner 9 and the Gasabschaltventil 12. The gas burner 9 has a burner head 40 and a nozzle holder or a burner housing 41 with a gas nozzle 42. Via the gas supply line 13 and in particular via the adapter 25 of the gas nozzle 42 fuel gas is supplied, which mixes in a mixing chamber 43 of the burner housing 41 with primary air.

For selectively opening or closing the Gasabschaltventils 12 of a in the FIG. 5 shown open position in a in the Fig. 6 shown closed position, the actuator 15 is displaced. In this case, the actuating element 15 is biased by means of the spring means 34 in the direction of the closed position. On a front side 44 of the actuating element 15, a receiving pocket 45 may be provided, in which the spring means 34 in the in Fig. 6 shown closing position at least in sections and in the in Fig. 5 shown fully open position shown.

In the in Fig. 5 shown open position of the gas shutoff valve 12 is the end face 44 of the actuating element 15 against a bearing surface 46 of the valve housing 22. The actuator 15 is to move from in the Fig. 6 shown closing position in the in Fig. 5 shown open position with a Gargutgefäß not shown loaded. When lifting the Gargutgefäßes of the actuating element 15, this displaced by means of the spring means 34 automatically from the open position to the closed position. A central axis 47 of the actuating element 15 is arranged during displacement of the same from the open position to the closed position or vice versa parallel to a central axis 48 of the gas burner 9. Furthermore, a respective central axis 49 of the spacers 17, 18 is positioned parallel to the central axis 48 of the gas burner 9.

In the open position of the actuating element 15, the fuel gas flows through the radial bore 35 of the actuating element 15 therethrough. In the in Fig. 6 shown closing position, the bore 35 is closed on both sides of the valve housing 22. Here, the bore 35 forms a valve and the valve housing 22 has a corresponding valve seat.

The function of the delay device 27 is based on Fig. 6 and 7 explained. The Fig. 7 shows the gas shutoff valve 12 in its open position. The Fig. 6 shows the gas shutoff valve 12 in its closed position. The delay device 27 is adapted to delay an automatic displacement of the actuating element 15 by means of the spring device 34 from the open position to the closed position. In particular, the delay device 27 may be configured to delay the automatic displacement of the actuating element 15 from the open position to the closed position by a predetermined time interval. The predetermined time interval may be, for example, one second to a few seconds.

In particular, the delay device 27 damps a movement of the actuating element 15 during the automatic displacement of the same from the closed position to the open position. Here, when lifting the Gargutgefäßes of the actuating element 15, the displacement of the actuating element 15 from the open position to the closed position immediately, wherein the delay device 27, the movement of the actuating element 15 from the open position to the closed position brakes such that the bore 35 at least partially not from the Valve housing 22 is covered, so that for the predetermined time interval fuel gas can flow through the bore 35.

When displacing the actuating element 15 from the closed position to the open position, as in Fig. 7 shown, gas, in particular air from the second gas chamber 28 via the nozzle 29 is sucked into the first gas chamber 26. The nozzle 29 acts as a throttle point. The gas stream is in the Fig. 7 marked with arrows. When displacing the operating member 15 from the open position to the closed position, the gas flows in the reverse direction from the first gas chamber 26 via the nozzle 29 into the second gas chamber 28. Here, the nozzle 29 also acts as a throttle point. By way of example, the damping effect or the deceleration power of the delay device 27 can be set via the diameter of the nozzle 29.

Although the present invention has been described with reference to embodiments, it is variously modifiable.

LIST OF REFERENCE NUMBERS

1

stove

2

cooking

3

cooktop

4

Gas burner assembly

5

Gas burner assembly

6

Gas burner assembly

7

Gas burner assembly

8th

pan supports

9

gas burner

10

Gas control valve

11

actuating button

12

Gasabschaltventil

13

gas supply

14

Main gas line

15

actuator

16

frame

17

spacer

18

spacer

19

bearing surface

20

bearing surface

21

bearing surface

22

valve housing

23

flange

24

flange

25

adapter

26

gas chamber

27

delay means

28

gas chamber

29

jet

30

cover

31

drilling

32

sealing device

33

cap

34

spring means

35

drilling

36

drilling

37

drilling

38

thread

39

thread

40

burner head

41

burner housing

42

gas nozzle

43

mixing room

44

front

45

receiving pocket

46

bearing surface

47

central axis

48

central axis

49

central axis

AF

bearing surface

Claims (13)

1. Gas shut-off valve (12) for a gas burner (9), which is optionally able to be brought into an opened or closed state, with a delay facility (27), which is configured to delay a bringing of the gas shut-off valve (12) from the opened state into the closed state, wherein the gas shut-off valve (12) comprises an actuation element (15), which is able to be displaced from an open position into a closed position to optionally open or close the gas shut-off valve (12), and comprises a spring facility (34), with the aid of which the actuation element (15) is pretensioned in the direction of the closed position, wherein the delay facility (27) is configured to delay an automatic displacement of the actuation element (15) with the aid of the spring facility (34) from the open position into the closed position and wherein the delay facility (27) is a gas damper.
2. Gas shut-off valve according to claim 1, characterised in that the delay facility (27) damps a movement of the actuation element (15) when displacing the same from the closed position into the open position.
3. Gas shut-off valve according to claim 1 or 2, characterised in that the actuation element (15) has a contact surface (19) for a vessel for food to be cooked.
4. Gas shut-off valve according to one of claims 1 - 3, characterised in that the actuation element (15) is rod-shaped.
5. Gas shut-off valve according to one of claims 1 - 4, characterised in that the delay facility (27) has a first gas chamber (26) provided at the actuation element (15) and second gas chamber (28) provided at a valve housing (22), which is fluidically connected to the first gas chamber (26) via a nozzle (29).
6. Gas shut-off valve according to one of claims 1 - 5, characterised in that the actuation element (15) is able to be loaded with a vessel for food to be cooked for displacement from the closed position into the open position and that, when lifting the vessel for food to be cooked from the actuation element (15), the actuation element (15) is automatically displaced from the open position into the closed position with the aid of the spring facility (34).
7. Gas shut-off valve according to one of claims 1 - 6, characterised in that a centre axis (47) of the actuation element (15), on displacement of the same from the open position into the closed position or vice versa, is arranged in parallel with a centre axis (48) of the gas burner (9).
8. Gas burner assembly (4 - 7) for a cooking zone (2), with a gas burner (9), a gas regulation valve (10), a gas shut-off valve (12) according to one of claims 1 - 7 and a gas supply line (13), which fluidically connects the gas regulation valve (10) to the gas shut-off valve (12) and the gas shut-off valve (12) to the gas burner (9).
9. Gas burner assembly according to claim 8, characterised by a pot support (8) for placement of a vessel for food to be cooked, which has an actuation element (15) of the gas shut-off valve (12).
10. Gas burner assembly according to claim 9, characterised in that a contact surface (19) of the actuation element (15) and a respective contact surface (20, 21) of spacers (17, 18) of the pot support (8) form a common contact surface (AF) of the pot support (8).
11. Gas burner assembly according to claim 9 or 10, characterised in that a frame (16) of the pot support (8) is embodied from the same single piece of material as a valve housing (22) of the gas shut-off valve (12).
12. Cooking zone (2) with a gas shut-off valve (12) according to one of claims 1 - 7 and/or a gas burner assembly (4 - 7) according to one of claims 8 - 11.
13. Cooker (1) with a gas shut-off valve (12) according to one of claims 1 - 7, a gas burner assembly (4 - 7) according to one of claims 8 - 11 and/or a cooking zone (2) according to claim 12.

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