WO2015114495A1

WO2015114495A1 - Gas shut-off valve, gas burner assembly, cooking hob, and stove

Info

Publication number: WO2015114495A1
Application number: PCT/IB2015/050486
Authority: WO
Inventors: Alejandro Cabarga Herrera; Melca Gutierrez Humara; Luis Antonio Palacios Valdueza; Emilio Placer Maruri; Roberto Saiz Gonzalez
Original assignee: BSH Hausgeräte GmbH
Priority date: 2014-02-03
Filing date: 2015-01-22
Publication date: 2015-08-06
Also published as: EP3102879A1; CN105934630B; ES2542255B1; CN105934630A; TR201906602T4; EP3102879B1; ES2542255A1

Abstract

The invention relates to a gas shut-off valve (12) for a gas burner (9). Said shut-off valve (12) can be alternatively put in an open or closed state and comprises a delaying device (27) which is designed to delay the moment when the gas shut-off valve (12) is put from the open state into the closed state.

Description

Gas shut-off valve, gas burner arrangement, hob and stove

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. FR 2 662 236 A1 describes a gas shut-off valve for a gas burner. The gas shut-off valve has an actuating element which, when stopping a

Gargutgefäßes is pressed down on the gas burner and so lifts a valve body from 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.

Against this background, an object of the present invention, a

to provide improved gas shutoff valve.

Accordingly, a Gasabschaltventil for a gas burner, which can be brought either in an open or closed state, with a

Delay device proposed, which is adapted to delay a movement of Gasabschaltventils from the open state to the closed state.

The gas shut-off valve may be a solenoid valve. In particular, that can

Gas shutoff valve having 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. The detection device can For this purpose, for example, have 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 thereby delays the movement of the gas shut-off valve from the open to the closed state, so that the gas shut-off valve when removing the

Gargutgefäßes remains over a predetermined time interval in the open state. This prevents that a burner flame of the gas burner extinguished immediately when removing the Gargutgefäßes.

According to one embodiment, the gas shut-off valve comprises an actuating element which is provided for selectively opening or closing the gas shut-off valve

Open position in a closed position is displaced and a spring means by means of which the actuating element is biased in the direction of a closed position. The delay device is adapted to automatically displace the

Actuator by means of the spring device from the open position in the

Delayed closing position. In particular, the delay device is adapted to the automatic

Shifting the actuator from the open position to the closed position to delay 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 momentary lifting of the cooking vessel from the Gas burner. This can be dispensed with a renewed ignition of the gas burner at 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. Especially

The deceleration 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.

According to a further embodiment, the delay 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. One

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, which is provided on a valve housing of the gas shut-off valve and 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. Furthermore, when lifting the Gargutgefäßes of the actuating element shifts

Actuator by means of the spring device 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 is prevented during the

Briefly lifting the Gargutgefäßes of the gas burner, the gas supply

is interrupted.

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 actuator is preferably linear relative to the valve housing

displaced. The actuating element is in particular in a valve housing of the

Gas shutoff valve into or out of this displaced.

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 form a support surface of the

Actuator and a respective bearing surface of spacers of the

Topfträgers 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 uniform

spaced from each other around the gas burner around. On the common support surface, a Gargutgefäß be turned off.

According to a further embodiment is a frame of the pot carrier

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 with such a gas shut-off valve, such

Gas burner assembly and / or proposed 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 before or below with respect to the

Embodiments described features or embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the invention.

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 a schematic plan view of the cooking area according to FIG. 1; FIG.

FIG. 3 shows a schematic perspective view of an embodiment of a gas burner arrangement of the hotplate according to FIG. 1; FIG. 4 shows a schematic exploded perspective view of a

Embodiment of a pot carrier of the cooking position according to FIG. 1;

5 shows a schematic sectional view of the gas burner arrangement according to FIG. 3;

Fig. 6 shows a schematic sectional view of an embodiment of a

Gas shutoff valve of the gas burner assembly according to FIG. 3; and FIG. 7 shows, in a further schematic sectional view, the gas shut-off valve according to FIG. 6.

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

Fig. 1 shows a schematic perspective view of a stove 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 may be covered with a cooktop panel, not shown in FIG. The hob 2 has several

Gas burner assemblies 4 - 7 on. The number of gas burner arrangements 4-7 is arbitrary. As shown in FIG. 1, the hotplate 2 may have four gas burner assemblies 4-7. 2 shows the stove 1 in a plan view. 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 1 1, 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 with the gas shut-off valve 12 and the gas shut-off valve 12 with the gas burner 9. 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

4 shows 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 integral 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. The connection flange 24 has in

Direction of a center of the annular frame 16 of the pot carrier 8. At the second connection flange 24, an adapter 25 may be provided for connecting the valve housing 22 of the Gasabschaltventils 12 with the gas burner 9.

The gas shut-off valve 12 also has the actuating element 15. The

Actuator 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 at the

Valve housing 22 of the gas shutoff valve 12 provided second gas chamber 28. 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 to the frame

Receiving holes 36, 37 may be provided, which are designed in particular as threaded holes. 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 evenly distributed around a circumference of the annular frame 16 of the pot carrier 8 is arranged.

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 42nd

Fuel gas supplied, which mixes in a mixing chamber 43 of the burner housing 41 with primary air. For selectively opening or closing the gas shutoff valve 12 from an open position shown in FIG. 5 to a closed position shown in FIG

Actuator 15 displaced. In this case, the actuating element 15 is biased by means of the spring means 34 in the direction of the closed position. A receiving pocket 45 can be provided on an end face 44 of the actuating element 15, in which the spring device 34 is completely accommodated in the closed position shown in FIG. 6 at least in sections and in the open position shown in FIG. In the open position of the gas shut-off valve 12 shown in FIG. 5, the end face 44 of the actuating element 15 bears against a bearing surface 46 of the valve housing 22. The actuating element 15 is for relocating from the closed position shown in FIG. 6 in the open position shown in FIG. 5 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 that shown in Fig. 6

Closed 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 will be explained with reference to FIGS. 6 and 7. Fig. 7 shows the gas shut-off valve 12 in its open position. Fig. 6 shows that

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 adapted to automatically displace the actuating element 15 from the open position into the

Closed position to delay 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

Actuator 15 when automatically displacing the same from the closed position to the open position. This can when lifting the Gargutgefäßes of the

Actuator 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 into the open position, as shown in FIG. 7, gas, in particular air, is sucked from the second gas chamber 28 via the nozzle 29 into the first gas chamber 26. The nozzle 29 acts as a throttle point. The gas flow is indicated in FIG. 7 by 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. About the diameter of the nozzle 29, for example, the damping effect or the

Delay power of the delay device 27 can be adjusted.

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

LIST OF REFERENCE NUMBERS

1 stove

2 hob

3 hob

4 gas burner arrangement

5 gas burner arrangement

6 gas burner arrangement

7 gas burner arrangement

8 pot carrier

9 gas burners

10 gas control valve

11 operating button

12 gas shut-off valve

13 gas supply

14 main gas line

15 actuator

16 frames

17 spacers

18 spacers

19 bearing surface

20 contact surface

21 bearing surface

22 valve housing

23 connection flange

24 connection flange

25 adapters

26 gas chamber

27 delay device

28 gas chamber

29 nozzle

30 cover

31 hole 32 sealing device 33 cap 34 spring device 35 bore 36 bore 37 bore 38 thread 39 thread 40 burner head 41 burner housing 42 gas nozzle 43 mixing cavities 44 front 45 receiving pocket 46 bearing surface 47 central axis 48 central axis 49 center axis

AF bearing surface

Claims

A gas shut-off valve (12) for a gas burner (9), which can be selectively brought into an open or closed state, with a delay device (27), which is adapted to bring the Gasabschaltventils (12) from the open state to the closed Delay state.

2. Gas shut-off valve according to claim 1, characterized in that the

Gas shutoff valve (12) an actuating element (15) for selectively opening or closing the Gasabschaltventils (12) from an open position in a

Closing position is displaced, and comprises a spring means (34) by means of which the actuating element (15) is biased towards the closed position, and that the delay means (27) is adapted to an automatic displacement of the actuating element (15) by means of the spring means (34) from the open position to the closed position.

3. Gas shut-off valve according to claim 2, characterized in that the

Delay device (27) attenuates a movement of the actuating element (15) when displacing it from the closed position to the open position.

4. Gas shut-off valve according to claim 2 or 3, characterized in that the

Actuating element (15) has a bearing surface (19) for a Gargutgefäß.

5. Gas shut-off valve according to one of claims 2-4, characterized in that the actuating element (15) is rod-shaped.

6. Gas shut-off valve according to one of claims 2-5, characterized in that the deceleration device (27) is a gas damper.

7. Gas shutoff valve according to claim 6, characterized in that the

Delay means (27) comprise a first gas chamber (26) provided on the actuator (15) and one on a valve housing (22) of the gas shut-off valve (12) provided second gas chamber (28) which is fluidly connected via a nozzle (29) with the first gas chamber (26).

8. Gas shut-off valve according to one of claims 2-7, characterized in that the actuating element (15) for displacing the closed position in the

Open position with a Gargutgefäß is loadable and that when lifting the

Gargutgefäßes of the actuating element (15), the actuating element (15) by means of the spring means (34) automatically from the open position in the

Shifted closing position.

9. Gas shutoff valve according to one of claims 2-8, characterized in that a central axis (47) of the actuating element (15) when displacing the same from the open position to the closed position or vice versa parallel to a central axis (48) of the gas burner (9) is arranged ,

10. Gas burner arrangement (4-7) for a cooking station (2), with a gas burner (9), a gas control valve (10), a Gasabschaltventil (12) according to any one of claims 1-9 and a gas supply line (13), the gas control valve (10) with the

Gas shut-off valve (12) and the gas shut-off valve (12) with the gas burner (9) fluidly connects.

11. Gas burner arrangement according to claim 10, characterized by a pot carrier (8) for parking a Gargutgefäßes, an actuating element (15) of the

Gas shutoff valve (12).

12. Gas burner arrangement according to claim 1 1, characterized in that a

Support surface (19) of the actuating element (15) and a respective bearing surface (20, 21) of spacers (17, 18) of the pot carrier (8) has a common

Form support surface (AF) of the pot carrier (8).

13. Gas burner assembly according to claim 1 1 or 12, characterized in that a frame (16) of the pot carrier (8) integral with a valve housing (22) of the Gasabschaltventils (12) is formed.

14. Hob (2) with a Gasabschaltventil (12) according to any one of claims 1-9 and / or a gas burner assembly (4-7) according to any one of claims 10-13.

15. hearth (1) with a gas shut-off valve (12) according to any one of claims 1-9, a gas burner assembly (4-7) according to any one of claims 10-13 and / or a cooking position (2) according to claim 14.