EP3278025B1 - Gas burner and gas cooktop - Google Patents

Description

The present invention relates to a gas burner and a gas hob.

A gas burner can have a burner lower part, a burner upper part connected to the burner lower part and a burner cover placed on the burner upper part. The gas burner can comprise a thermocouple and an ignition element for flame monitoring and ignition. The ignition element and the thermocouple can be fastened to the burner lower part with the aid of fastening means such as fastening lugs or spring elements. The EP 2 439 449 A1 describes such a gas burner.

The DE 199 31 686 A1 describes a gas burner in which a spark plug is passed both through a bore provided in a nozzle holder of the gas burner and through a bore provided in a burner lower part of the gas burner.

The US 2010/0279238 A1 describes a gas burner that includes an ignition element disposed within the gas burner. The ignition element is fastened to a nozzle holder of the gas burner and is passed through a bore provided in a burner lower part of the gas burner.

The EP 0 964 203 A1 describes a gas burner for household appliances. The gas burner includes a body and a feed head. The body is elastically supported by elastic fastening means at the edge of a hole in a hob plate and has means for centering it with respect to the hob plate.

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

Accordingly, a gas burner for a gas hob is proposed. The gas burner includes a burner base configured to be placed below a hob plate of the gas hob, a burner top configured to be placed above the hob plate and connected to the burner base, and a thermocouple and / or an ignition element , which is received simultaneously in a receiving section of the lower burner part and a receiving section of the upper burner part, the gas burner has a sealing device which can be arranged between the hob plate and the burner lower part, the receiving section of the burner upper part having a deformation section which is designed to elastically deform the sealing device when connecting the burner lower part to the burner upper part, with a fastening section of the thermocouple and / or the ignition element between the The lower burner part and the upper burner part is arranged, and wherein the deformation section is set up to fix the thermocouple and / or the ignition element between the receiving section of the lower burner part and the receiving section of the upper burner part.

Because the thermocouple and / or the ignition element are accommodated simultaneously in the lower burner part and the upper burner part, additional fastening elements can be dispensed with. This sandwich construction means that the thermocouple and / or the ignition element are permanently and reliably fixed in the intended position.

A fastening section of the thermocouple and / or the ignition element is arranged between the lower burner part and the upper burner part.

The fastening section is preferably cylindrical.

The gas burner has a sealing device which can be arranged between the hob plate and the burner lower part.

The sealing device is preferably elastically deformable. The sealing device is in particular set up to seal the burner lower part against the hob plate.

The receiving section of the upper burner part has a deformation section which is set up to elastically deform the sealing device when the lower burner part is connected to the upper burner part.

The deformation section preferably has a semicircular end face with which a compressive force can be exerted on the sealing device. As a result, the sealing device deforms elastically.

According to a further embodiment, the deformation section is set up to deform the sealing device in such a way that the sealing device is at least partially in direct contact with the thermocouple and / or the ignition element.

When a compressive force is applied to the sealing device, material of the sealing device is pressed against the thermocouple and / or the ignition element.

The deformation section is designed to fix the thermocouple and / or the ignition element between the receiving section of the lower burner part and the receiving section of the upper burner part.

The receiving sections are designed to correspond to the fastening section of the thermocouple and / or the ignition element. The receiving sections preferably encompass the fastening section in a form-fitting manner.

According to a further embodiment, the deformation section is designed to deform the sealing device in such a way that the sealing device at least partially conforms to the thermocouple and / or to the ignition element.

This reliably prevents the thermocouple and / or the ignition element from wobbling or vibrating.

According to a further embodiment, the deformation section is semicircular.

In particular, the deformation section has the shape of a halved tube. The deformation section can at least partially encompass or encircle the receiving section of the upper burner part.

According to a further embodiment, the deformation section extends from an underside of the upper burner part.

The deformation section is in particular formed in one piece with the upper part of the burner.

According to a further embodiment, the receiving section of the upper burner part is arranged within an outer diameter of the upper burner part.

This results in a compact design of the gas burner.

According to a further embodiment, the gas burner comprises a sealing ring which can be arranged between the burner upper part and the hob plate.

In particular, the sealing ring is made of an elastically deformable material.

According to a further embodiment, the sealing ring comprises a circumferential contact flange which is set up to lie flat on the hob plate.

In particular, the thermocouple and / or the ignition element are arranged between the receiving section and the sealing ring.

According to a further embodiment, the upper part of the burner has a centering flange for centering the upper part of the burner on the sealing ring.

This simplifies the assembly of the upper part of the burner. This reduces the complexity of assembling the gas burner.

Furthermore, a gas hob with a hob plate and such a gas burner is proposed, which is attached to the hob plate.

The gas hob can be a household appliance or part of a household appliance.

According to a further embodiment, the hob plate is a glass ceramic plate.

Further possible implementations of the gas burner and / or the gas hob also include combinations of features or embodiments described above or below with reference to the exemplary embodiments that are not explicitly mentioned. The person skilled in the art will also add individual aspects as improvements or additions to the respective basic shape of the gas burner and / or the gas hob.

• Fig. 1 zeigt eine schematische Schnittansicht einer Ausführungsform eines Gaskochfelds;
• Fig. 2 zeigt eine schematische Explosionsansicht des Gaskochfelds gemäß der Fig. 1;
• Fig. 3 zeigt eine weitere schematische Schnittansicht des Gaskochfelds gemäß der Fig. 1;
• Fig. 4 zeigt eine weitere schematische Schnittansicht des Gaskochfelds gemäß der Fig. 1;
• Fig. 5 zeigt eine schematische perspektivische Ansicht einer Ausführungsform eines Brenneroberteils eines Gasbrenners für das Gaskochfelds gemäß der Fig. 1; und
• Fig. 6 zeigt eine weitere schematische perspektivische Ansicht des Brenneroberteils gemäß der Fig. 5.

Further advantageous refinements and aspects of the gas burner and / or the gas hob are the subject of the subclaims and the exemplary embodiments of the gas burner and / or the gas hob described below. The gas burner and / or the gas hob are explained in more detail below on the basis of preferred embodiments with reference to the attached figures.

• Fig. 1 shows a schematic sectional view of an embodiment of a gas hob;
• Fig. 2 shows a schematic exploded view of the gas hob according to the Fig. 1 ;
• Fig. 3 shows a further schematic sectional view of the gas hob according to the Fig. 1 ;
• Fig. 4 shows a further schematic sectional view of the gas hob according to the Fig. 1 ;
• Fig. 5 shows a schematic perspective view of an embodiment of a burner upper part of a gas burner for the gas hob according to the Fig. 1 ; and
• Fig. 6 shows a further schematic perspective view of the burner upper part according to the Fig. 5 .

In the figures, elements that are the same or have the same function have been provided with the same reference symbols, unless stated otherwise.

The Fig. 1 shows a schematic sectional view of a gas hob 1. Die Fig. 2 shows a schematic exploded view of the gas hob 1. Die Fig. 3 and 4th each show schematic sectional views of the gas hob 1. In the following, the 1 to 4 referred to at the same time.

The gas hob 1 comprises a cooktop plate 2. The cooktop plate 2 can be a glass ceramic plate. The gas hob 1 further comprises at least one gas burner 3. The gas hob 1 can have any number of gas burners 3. For example, the gas hob 1 can comprise four gas burners 3.

The gas burner 3 has a burner lower part 4 which can be arranged below the hob 2. The burner lower part 4 comprises a gas connection 5 for connecting the gas burner 3 to a gas feed line. The burner lower part 4 further comprises a nozzle holder 6, in which a fuel gas nozzle can be received, in particular screwed in. The gas connection 5 and the nozzle holder 6 are preferably arranged perpendicular to one another. A connection section 8, which has the gas connection 5 and the nozzle receptacle 6, extends from the underside of an annular base section 7 of the burner lower part 4. The burner lower part 4 can for example be made of a magnesium or aluminum alloy. For example, the burner lower part 4 can be a die-cast component.

Support arms 9 extend radially from the annular base section 7. The support arms 9 are arranged in a V-shape. For example, the burner lower part 4 can have two such support arms 9, with which the burner lower part 4 is supported on the hob plate 2. A receiving arm 10 for receiving a thermocouple 11 and / or an ignition element, not shown, also extends from the base section 7. For this purpose, the receiving arm 10 has at least one receiving section 12 for receiving the thermocouple 11 and / or the Ignition element on. The receiving arm 10 further comprises a recess 13. The receiving arm 10 is dimensioned thicker than the support arms 9.

An elastically deformable sealing device 14 is arranged between the burner lower part 4 and the hob plate 2. The sealing device 14 has an opening 15 for the base section 7 of the burner lower part 4 and openings 16, 17 for the thermocouple 11 and / or the ignition element.

The gas burner 3 further comprises a burner upper part 18 arranged above the hob 2. The upper burner part 18 can be made of a magnesium or aluminum alloy, for example. For example, the burner upper part 18 can be a die-cast component. The upper burner part 18 has a central base section 19, which is preferably tubular and extends at least in sections into the base section 7 of the lower burner part 4. An annular distribution space 20 is provided all around the base section 19. With the help of the distribution space 20, a fuel gas / air mixture is evenly distributed. The distribution space 20 is delimited on the outside by a circumferential wall 21.

An annular circumferential flange 22 adjoins the circumferential wall 21. The burner upper part 18 or the flange 22 has an outer diameter or diameter d ₁₈ . The diameter d _{18 is} variable for different sizes of gas burners 3. A centering flange 23 extends out from the underside of the flange 22. The base section 19 of the burner upper part 18 is guided through the hob plate 2 through a bore 24 provided in the hob plate 2. A sealing ring 25 is provided between the centering flange 23 and the bore 24. With the help of the centering flange 23, the burner upper part 18 can be centered on the sealing ring 25. The sealing ring 25 is preferably elastically deformable. The sealing ring 25 has a circumferential contact flange 26 which is designed to lie flat on the hob plate 2.

Furthermore, the burner upper part 18 comprises at least one receiving section 27, 28 ( Fig. 5 , 6 ) for receiving the thermocouple 11 and / or the ignition element. The upper burner part 18 is connected to the lower burner part 4. For example, the upper burner part 18 and the lower burner part 4 are screwed together. The Thermocouple 11 and / or the ignition element are accommodated simultaneously in the receiving section 12 of the lower burner part 4 and the receiving section 27, 28 of the upper burner part 18. The thermocouple 11 and / or the ignition element are therefore sandwiched between the lower burner part 4 and the upper burner part 18.

The gas burner 3 further comprises a burner cover 29 placed on the burner upper part 18. The burner cover 29 can be made of a magnesium or aluminum alloy, for example. For example, the burner cap 29 can be a die-cast component. Radial gas outlet channels 30 are provided on the burner cover 29, from which the fuel gas / air mixture flows out of the distribution space 20. The thermocouple 11 further comprises a cylindrical fastening section 36 which is arranged between the lower burner part 4 and the upper burner part 18. The fastening section 36 is simultaneously received in the receiving section 12 of the lower burner part 4 and the receiving section 27, 28 of the upper burner part 18.

As the Fig. 5 and 6 show, the upper burner part 18 has at least one deformation section 31, 32 which is set up to elastically deform the sealing device 14 when the lower part 4 of the burner is connected to the upper part 18 of the burner. For example, two deformation sections 31, 32 are provided. The deformation sections 31, 32 are preferably tubular with a semicircular geometry. The receiving sections 27, 28 can be at least partially surrounded by the deformation section 31, 32. The deformation sections 31, 32 extend from an underside 33 of the burner upper part 18. The receiving sections 27, 28 are preferably arranged within the outer diameter d _{18 of} the upper burner part 18.

The deformation sections 31, 32 are set up to elastically deform the sealing device 14 when the burner lower part 4 is connected to the upper burner part 18. For this purpose, a compressive force is applied to the sealing device 14 with the aid of the deformation sections 31, 32. For this purpose, the deformation sections 31, 32 each have a semicircular end face 34, 35. As the Fig. 4 shows, the sealing device 14 is deformed in such a way that the sealing device 14 is at least partially in direct contact with the thermocouple 11 and / or the ignition element. Furthermore, the thermocouple 11 and / or the ignition element is also in direct contact with the sealing ring 25. This achieves a sandwich construction in which the thermocouple 11 and / or the ignition element are arranged between the lower burner part 4 and the upper burner part 18 and with the aid of the sealing device 14 can be fixed. The sealing device 14 at least partially nestles against the thermocouple 11 and / or the ignition element.

Because the thermocouple 11 and / or the ignition element are arranged between the lower burner part 4 and the upper burner part 18, additional parts for fastening them to the gas burner 3 can be dispensed with. This reduces the complexity of the gas burner 3. The costs for producing or assembling the gas burner 3 are reduced. With the help of the centering flange 23, the assembly of the burner upper part 18 on the hob plate 2 is simplified. The aesthetics of the gas burner 3 is improved in that the receiving sections 27, 28 are arranged within the diameter d ₁₈ . Furthermore, the gas burner 3 can thereby also be made more compact.

REFERENCE SIGN LIST

1

Gas hob

2nd

Cooktop

3rd

Gas burner

4th

Burner lower part

5

Gas connection

6

Nozzle holder

7

Base section

8th

Connecting section

9

Support arm

10th

Arm

11

Thermocouple

12th

Receiving section

13

Recess

14

Sealing device

15

breakthrough

16

breakthrough

17th

breakthrough

18th

Burner top

19th

Base section

20th

Distribution room

21

Wall

22

flange

23

Centering flange

24th

drilling

25th

Sealing ring

26

Contact flange

27

Receiving section

28

Receiving section

29

Burner cap

30th

Gas outlet duct

31

Deformation section

32

Deformation section

33

bottom

34

Face

35

Face

36

Fastening section

d ₁₈

diameter

Claims (11)

1. Gas burner (3) for a gas cooktop (1), comprising a burner lower part (4), which is configured to be arranged below a cooktop plate (2) of the gas cooktop (1), a burner upper part (18), which is configured to be arranged above the cooktop plate (2) and is connected to the burner lower part (4), and a thermocouple (11) and/or an igniting element, which is simultaneously received in a receiving section (12) of the burner lower part and a receiving section (27, 28) of the burner upper part (18), wherein the gas burner (3) has a sealing device (14) which can be arranged between the cooktop plate (2) and the burner lower part (4), wherein the receiving section (27, 28) of the burner upper part (18) has a deformation section (31, 32), which is configured to deform the sealing device (14) in a resilient manner when the burner lower part (4) is connected to the burner upper part (18), wherein a fastening section (36) of the thermocouple (11) and/or of the igniting element is arranged between the burner lower part (4) and the burner upper part (18), and wherein the deformation section (31, 32) is configured to fix the thermocouple (11) and/or the igniting element between the receiving section (12) of the burner lower part (4) and the receiving section (27, 28) of the burner upper part (18).
2. Gas burner according to claim 1, characterised in that the deformation section (31, 32) is configured to deform the sealing device (14) in such a way that the sealing device (14) is at least partially in direct contact with the thermocouple (11) and/or the igniting element.
3. Gas burner according to claim 1 or 2, characterised in that the deformation section (31, 32) is configured to deform the sealing device (14) in such a way that the sealing device (14) fits at least partially against the thermocouple (11) and/or the igniting element.
4. Gas burner according to one of claims 1 - 3, characterised in that the deformation section (31, 32) is semicircular.
5. Gas burner according to one of claims 1 - 4, characterised in that the deformation section (31, 32) extends out from a lower side (33) of the burner upper part (18).
6. Gas burner according to one of claims 1 - 5, characterised in that the receiving section (27, 28) of the burner upper part (18) is arranged within an outer diameter (d₁₈) of the burner upper part (18).
7. Gas burner according to one of claims 1 - 6, characterised by a sealing ring (25) which can be arranged between the burner upper part (18) and the cooktop plate (2).
8. Gas burner according to claim 7, characterised in that the sealing ring (25) comprises a circumferential contact flange (26), which is configured to rest against the cooktop plate (2) in a planar manner.
9. Gas burner according to claim 7 or 8, characterised in that the burner upper part (18) has a centring flange (23) for centring the burner upper part (18) on the sealing ring (25).
10. Gas cooktop (1), comprising a cooktop plate (2) and a gas burner (3) according to one of claims 1 - 9, which is fastened to the cooktop plate (2).
11. Gas cooktop according to claim 10, characterised in that the cooktop plate (2) is a glass-ceramic plate.

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