EP2844918A2

EP2844918A2 - Gas heated cooking appliance

Info

Publication number: EP2844918A2
Application number: EP13727370.2A
Authority: EP
Inventors: Paulo Marcos Andrade Soares; Melca Gutierrez Humara; Oscar Peña Martín; Emilio Placer Maruri
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2012-05-03
Filing date: 2013-04-23
Publication date: 2015-03-11
Also published as: ES2428245A2; ES2428245R1; WO2013164732A2; WO2013164732A3

Abstract

The invention relates to a gas-heated cooking appliance (1) in particular a gas hob, comprising a ball valve (2) for controlling a gas stream (5).

Description

Gas-heated cooking appliance

The present invention relates to a gas-fired cooking appliance, in particular a

Gas cooktop.

Gas-fired cooking appliances are supplied, for example via a wall connection with a gas stream. For this purpose, it is known to connect a central gas valve of the cooking appliance with the wall connection. Downstream of the central gas valve, a plurality of burners are usually provided. The burners are each connected via a branch line and a corresponding valve with a central line, which can be shut off by means of the central gas valve.

The valves currently used in such gas fired cooking appliances, particularly the central gas valve, are not satisfactory in terms of their flow rate, sizing and price.

Against this background, an object of the present invention is to provide an improved gas fired cooking appliance. To solve this problem, a gas-fired cooking appliance, in particular a

Gas hob, proposed with a ball valve to control a gas flow.

Such ball valves are characterized by the fact that they are widely used, albeit in a different application. The correspondingly good availability of

Ball valve valves make them attractive for gas-fired cooking appliances in the household.

In addition, such ball valve valves can be easily adapted to the specific requirements of a gas-fired cooking appliance.

According to one embodiment, at least one burner and a conduit for supplying the burner with the gas stream are provided. Furthermore, the line for controlling the gas flow by means of the ball valve can be opened and shut off.

Typically, two to six burners are provided. According to a further embodiment, a plurality of burners are provided. All burners are supplied with the gas flow by means of the line. Accordingly, the line is a central line, with corresponding branch lines supplying the burners with a respective gas flow. Such a central shut-off makes it possible to shut off the gas supply for all burners by means of only one valve.

According to a further embodiment, the ball valve is manually actuated. This is inexpensive.

According to a further embodiment, the ball valve is electromagnetically actuated. "Electromagnetic" includes embodiments in which, for example, a coil, a three-phase motor or a linear motor, a closing element of

Ball valve actuated to enable or disable the line.

According to another embodiment, an AC power source provides the power for electromagnetic actuation.

In accordance with another embodiment, a DC source provides the energy for electromagnetic actuation.

The mentioned three-phase or linear motor can therefore be powered by a DC or AC power source. According to a further embodiment, the ball valve has a closing element held on a shaft of the ball valve. The closing element is

formed, for example, spherical with a central opening and closes in a closed position of the ball valve valve an opening in a valve seat of the

Ball valve valve. The shaft rotatably carries a gear, which is rotatable for controlling the gas flow by means of a rack. The rack may for example be driven by a coil. According to a further embodiment, the ball valve is arranged coaxially in the gas flow. This means that the ball valve is not arranged in a bypass line, but in the central line itself. According to a further embodiment, the ball valve is adapted to supply a gas stream of a maximum of 200 to 400 liters per hour to a respective burner. For example, in four burners, this means that the ball valve is adapted to supply a gas flow of a maximum of 800 to 1600 liters per hour. Further possible implementations of the invention also include combinations which are not explicitly mentioned and which have been described above or below

Embodiments described features or embodiments of

Gas-fired cooking appliance. The expert is also individual aspects as

Add or change 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.

It shows:

1 shows a perspective view of a section of a gas-fired cooking appliance with a ball valve according to an embodiment;

Fig. 2: the ball valve of Figure 1, wherein a gear is the same removed.

FIG. 3 is an exploded view of the ball valve of FIG. 1; FIG. and

4 shows an exploded view of a ball valve according to another

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

1 shows a perspective view of a section of a gas-fired cooking appliance 1. The cooking appliance 1 is formed for example as a gas hob.

The cooking appliance 1 comprises a ball valve 2.

The ball valve 2 is arranged coaxially in a central gas line 3 of the cooking device 1. The central gas line 3 connects a central gas supply line of the corresponding house or the corresponding apartment with burners 4 of

Cooking device 1. By means of the ball valve 2, a gas stream 5, which is supplied to the burners 4 by means not shown branch lines, controlled. For this purpose, the ball valve 2 blocks the line 3 or releases it at least partially. The gas line 3 is referred to as the central gas line, since it supplies all the burners 4 of the cooking appliance 1 with the gas stream 5.

According to the embodiment, the ball valve 2 is actuated electromagnetically. For this purpose, the cooking appliance 1 to a coil, not shown, which of a

AC power source 8 is powered. The spool operates a rack 6 which is engaged with a gear 7. As a result, the gear 7 rotates about a rotation axis 1 1. The gear 7 is rotatably connected to a shaft 12 of the ball valve 2.

The shaft 12 and its interaction with the gear 7 and a non-rotatably connected to the shaft 12 closing member 13 is shown in more detail in Figures 2 and 3. In this case, Figure 2 shows the view of Figure 1, wherein the gear 7 is removed. FIG. 3 shows an exploded view of the ball valve 2 of FIG. 1.

The closing element 13 is spherical and has a central opening 14. In the open position of the ball valve 2, the opening 14 is flowed through by the gas stream 5 and defines its flow cross-section. In the closed position of the ball valve 2, the closing element 13 seals against a valve seat, not shown, of the ball valve 2, so that no gas through the ball valve 2 can flow. FIG. 3 shows the closing element 13 in the closed position of FIG

Ball valve 2.

The predetermined by the opening 14, maximum flow cross-section of the

Ball valve 2, for example, provided such that a respective burner 4, a gas flow of a maximum of 300 liters per hour can be fed. According to the

Embodiment, two burners 4 are provided so that the opening 14 is designed for a maximum gas flow of 600 liters per hour. To reset the closing element 13 from the open position of the ball valve 2 in its closed position, for example, when the mentioned coil is not energized, a spring 15 may be provided. The spring 15 is formed for example as a spiral spring and engages at its one end 16 in a groove 17 of the shaft 12 a. At its other end 21, the spring 15 engages a housing 22 of the ball valve 2. This ensures that when the cooking appliance 1 is switched off, the ball valve 2 is in its closed position, so that no gas flow 5 to the burners 4 is. When switching on the cooking device 1, the coil is energized and actuates the ball valve 2 in its open position, so that the burner 4 are each supplied with the gas stream 5. However, the gas flow 5 is only available at the gas burners 4 if the user also at least partially opens a valve, not shown, upstream of a respective burner 4.

FIG. 4 illustrates in an exploded view a further embodiment of a

Ball valve 2.

The ball valve 2 comprises a housing, which is composed of two housing halves 23, 24 screwed together. The two housing halves 23, 24 receive the closing element 13 in their interior. In a respective housing half 23, 24, an end 25 of the central gas line 3 can be inserted. After insertion, a respective end 25 is secured by means of a ring 26 in the respective housing half 23, 24.

A respective ring 26 may have a profiled section 27 for manually screwing the ring 26 into a corresponding thread 28 of the respective housing halves 23, 24 exhibit. In this case, a thread 32 formed on a plurality of projections 31, which extend axially from the profiled section 27, is screwed to the thread 28 of the housing half 23 or 24. When screwing in the projections 31 are pressed inwards and squeeze the corresponding end 25 of the central gas line 3. The resulting frictional locking secures the end 25 of the gas line 3 in the corresponding housing half 23 and 24 respectively.

A respective housing half 23, 24 thus forms a so-called Schraubquetschkupplung 33 with a respective ring 26.

Although the present invention has been described with reference to embodiments, it is variously modifiable. In particular, the exemplary embodiments according to FIGS. 1 to 3 and according to FIG. 4 can be combined with one another.

Used reference signs:

1 cooking appliance

2 ball valve

3 central gas line

4 burners

5 gas flow

6 rack

7 gear

8 AC power source

1 1 rotation axis

12 shaft

13 closing element

14 opening

15 spring

16 end

17 groove

21 end

22 housing

23 housing half

24 housing half

25 end

26 ring

27 section

30 threads

31 lead

32 threads

33 Schraubquetschkupplung

Claims

1. Gas-fired cooking appliance (1), in particular gas hob, with a ball valve (2) for controlling a gas flow (5).

2. cooking appliance according to claim 1, characterized in that at least one burner (4) and a conduit (3) for supplying the burner (4) with the gas stream (5) are provided and that the conduit (3) for controlling the gas flow ( 5) by means of

Ball valve (2) is releasable and lockable.

3. Cooking appliance according to claim 2, characterized in that a plurality of burners (4) are provided and that the line (3) supplies all the burners (4) with the gas stream (5).

4. cooking appliance according to one of claims 1 - 3, characterized in that the

Ball valve (2) is manually operable.

5. Cooking appliance according to one of claims 1 - 3, characterized in that the

Ball valve (2) is electromagnetically actuated.

6. cooking appliance according to claim 5, characterized in that an AC power source (8) provides energy for electromagnetic actuation.

7. Cooking appliance according to claim 5, characterized in that a DC power source provides energy for electromagnetic actuation.

8. Cooking appliance according to one of claims 1-7, characterized in that the

Ball valve (2) has a on a shaft (12) held closing element (13) and that the shaft (12) rotatably carries a gear (7), which for controlling the gas flow (5) by means of a rack (6) is rotatable.

9. cooking appliance according to one of claims 1-8, characterized in that a

Integration of the ball valve (2) in the line (3) by means of a quick coupling or Schraubquetschkupplung (33) is provided.

10. Cooking appliance according to one of claims 1 - 9, characterized in that the

Ball valve (2) is arranged coaxially in the gas stream (5).

1 1. Cooking appliance according to one of claims 2 to 10, characterized in that the ball valve (2) is adapted to a respective burner (4) to supply a gas stream (5) of a maximum of 200 to 400 liters per hour.