EP3198194B1 - Gas burner, gas hob, gas range and method for changing the fuel gas of a gas burner - Google Patents

Description

The present invention relates to a gas burner, a gas hob, a gas stove and a method for changing the fuel gas of a gas burner.

A gas burner has a mixing chamber or a mixing tube into which a gas nozzle injects fuel gas. The mixing tube acts as a Venturi tube, which means that primary air is sucked in past the gas nozzle and into the mixing chamber. The gas nozzle can be exchanged for the use of different fuel gases. The mixing chamber remains unchanged.

The US 6,537,065 B1 and the U.S. 5,266,026 A each describe a gas burner with an exchangeable mixing tube that is received in a burner lower part of the gas burner.

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

Accordingly, a gas burner for a gas stove, with a mixing tube for mixing fuel gas and primary air, a gas nozzle which is set up to inject the fuel gas into the mixing tube, and an insert that can be inserted and exchanged into the mixing tube for changing a geometry of the mixing tube, the The gas nozzle and the insert are received in a burner lower part of the gas burner, the burner lower part being designed in two parts and the burner lower part comprising a base section in which the gas nozzle is received and a mixing tube receiving section which receives the mixing tube.

Because the insert is exchangeable, the geometry of the mixing tube can be changed when the fuel gas is changed. This means that the premixing prior to combustion can be optimized for each fuel gas. The combustion is thereby improved for all fuel gases in question, since a suitable insert and a suitable gas nozzle can be provided for each fuel gas.

According to one embodiment, the insert is tubular.

The insert preferably has an annular cross section.

According to a further embodiment, a flow cross-sectional area of the mixing tube can be changed with the aid of the insert.

The flow cross-sectional area preferably has a circular shape. With the aid of the mixing tube and the insert, the flow cross-sectional area can be increased or decreased depending on the type of fuel gas used.

According to a further embodiment, the insert and the gas nozzle can be changed when the fuel gas is changed.

The gas nozzle can preferably be screwed into a burner lower part of the gas burner. This means that the gas nozzle can be easily changed. The insert can, for example, be screwed, pressed or loosely inserted into the lower burner part.

The gas nozzle and the insert can be accommodated in a burner base of the gas burner.

The lower part of the burner is made in two parts. The burner lower part comprises a base section in which the gas nozzle is received and a mixing tube receiving section which receives the mixing tube.

According to a further embodiment, the insert can be inserted into and removed from the mixing tube from an upper side of the lower burner part.

This enables the insert to be exchanged easily.

According to a further embodiment, the insert has a circumferential support flange which is designed to rest on the upper side of the lower burner part.

This always ensures a defined position of the insert when it is replaced. The support flange is preferably annular.

According to a further embodiment, a gas cooking point with at least one such gas burner and at least one gas control valve for regulating a fuel gas flow to the at least one gas burner is proposed.

Furthermore, a gas stove with at least one such gas burner and / or such a gas cooking point is proposed.

The gas stove is preferably a domestic appliance.

A method for changing the fuel gas of a gas burner is also proposed. The gas burner has a mixing tube for mixing the fuel gas with primary air, a gas nozzle which is set up to inject the fuel gas into the mixing tube, and an exchangeable insert that can be inserted into the mixing tube to change the geometry of the mixing tube. The process has the following process steps: changing the gas nozzle; Change of stake; and changing the fuel gas.

Further possible implementations of the gas burner, the gas hob, the gas stove and / or the method also include combinations of features or embodiments described above or below with regard to the exemplary embodiments, which 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, the gas cooking point, the gas stove and / or the method.

• Fig. 1 zeigt eine schematische Aufsicht einer Ausführungsform eines Gasherds;
• Fig. 2 zeigt eine schematische Seitenansicht einer Ausführungsform eines Gasbrenners für den Gasherd gemäß der Fig. 1;
• Fig. 3 zeigt eine schematische Schnittansicht des Gasbrenners gemäß der Fig. 2;
• Fig. 4 zeigt eine schematische perspektivische Ansicht eines Brennerunterteils des Gasbrenners gemäß der Fig. 2;
• Fig. 5 zeigt eine schematische Schnittansicht des Brennerunterteils gemäß der Fig. 4; und
• Fig. 6 zeigt eine schematische Ansicht eines Verfahrens zum Wechseln des Brenngases eines Gasbrenners.

Further advantageous configurations and aspects of the gas burner, the gas hob, the gas stove and / or the method are the subject matter of the subclaims and the exemplary embodiments of the gas burner, the gas hob, the gas stove and / or the method described below. Furthermore, the gas burner, the gas hob, the gas stove and / or the method are explained in more detail on the basis of preferred embodiments with reference to the enclosed figures.

• Fig. 1 shows a schematic top view of an embodiment of a gas range;
• Fig. 2 FIG. 11 shows a schematic side view of an embodiment of a gas burner for the gas range according to FIG Fig. 1 ;
• Fig. 3 FIG. 13 shows a schematic sectional view of the gas burner according to FIG Fig. 2 ;
• Fig. 4 FIG. 11 shows a schematic perspective view of a burner lower part of the gas burner according to FIG Fig. 2 ;
• Fig. 5 shows a schematic sectional view of the burner base according to FIG Fig. 4 ; and
• Fig. 6 shows a schematic view of a method for changing the fuel gas of a gas burner.

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

The Fig. 1 shows a schematic plan view of a gas stove 1. The gas stove 1 is a household appliance. The gas stove 1 has a gas hob 2 with a hob 3 and at least one gas burner arrangement 4. The gas burner arrangement 4 has a gas control valve 5 which is connected to a main gas line 6. The gas burner arrangement 4 further comprises a feed line 7 and a gas burner 8. The gas burner 8 is in FIG Fig. 1 shown only in greatly simplified form. The supply line 7 connects the gas control valve 5 to the gas burner 8. The gas cooking point 2 can have several gas burner arrangements 4. As the Fig. 1 shows, the gas cooking point 2 can have five gas burner arrangements 4. The gas control valve 5 is set up to regulate a fuel gas flow or gas volume flow to the gas burner 8 in a stepped or stepless manner or to optionally interrupt it. Each gas control valve 5 is attached to the main gas line 6. The gas control valve 5 is preferably clamped to the main gas line 6.

The Fig. 2 shows an embodiment of a gas burner 8 in a schematic side view Fig. 3 shows a schematic sectional view of the gas burner 8. In the following, reference is made to FIG Fig. 2 and 3 simultaneously referred to.

The gas burner 8 comprises a two-part burner lower part 9 with a base section 10, in which a gas nozzle 11 is received, and a mixing tube receiving section 12, which has a mixing chamber or a mixing tube 13 for mixing primary air L with fuel gas. The gas nozzle 11 is set up to inject fuel gas into the mixing tube 13. The mixing tube 13 is in particular a venturi tube. By injecting the Fuel gas in the mixing tube 13 is sucked in past the side of the gas nozzle 11, primary air L into the mixing tube 13.

The gas burner 8 furthermore comprises an upper burner part 14 with gas outlet openings 15. The gas outlet openings 15 are preferably evenly distributed around a circumference of the upper burner part 14. The upper burner part 14 is placed on the lower burner part 9. The lower burner part 9 and in particular the mixing tube receiving section 12 is connected, in particular screwed, to a cover plate or a top sheet of the gas cooking point 2.

The burner lower part 9 and the burner upper part 14 are preferably designed to be rotationally symmetrical to a symmetry or central axis 16 ( Fig. 2 ). Alternatively, the upper burner part 14 and / or the lower burner part 9 can have any other geometry such as, for example, an oval geometry, a rectangular geometry, a pentagonal or a hexagonal geometry.

The Fig. 4 shows an embodiment of the burner lower part 9 in a schematic perspective view. The Fig. 5 shows a schematic sectional view of the burner lower part 9. In the following, reference is made to FIG Fig. 4 and 5 simultaneously referred to.

The gas burner 8 comprises an insert 17 which can be inserted and exchanged in the mixing tube 13 for changing a geometry. The insert 17 is tubular. The mixing tube 13 has a flow cross-sectional area A. The throughflow cross-sectional area A can be circular.

With the aid of the insert 17, the flow cross-sectional area A of the mixing tube 13 can be changed. In particular, the throughflow cross-sectional area A can be enlarged or reduced with the aid of the insert 17. When changing the fuel gas, the insert 17 and the gas nozzle 11 can be changed at the same time. The gas nozzle 11 and the geometry of the mixing tube 13 can thus be optimized for the fuel gas used. Town gas, natural gas, liquid gas or the like, for example, can be used as the fuel gas.

By matching the geometry of the mixing tube 13 and the type of gas nozzle 11 to the fuel gas used, the stability of the burner flame can be improved. This prevents unwanted extinction. The premixing in the mixing tube 13 is optimized for each fuel gas. The combustion for all fuel gases is improved because an insert 17 and a corresponding gas nozzle 11 can be used for each fuel gas used. This increases the efficiency of the gas burner 8 and reduces the emission of greenhouse gases.

The insert 17 can be received in the lower burner part 9, in particular in the mixing tube receiving section 12. As the Fig. 4 and 5 show, the insert 17 can be inserted from an upper side 18 of the lower burner part 9 into the mixing tube 13 and removed from it again. The insert 17 has a tubular base section 19 and a support flange 20 that encircles the base section 19 in an annular manner. The support flange 20 is set up to rest on the upper side 18 of the lower burner part 9.

The Fig. 6 shows schematically a method for changing the fuel gas of a gas burner 8. In a method step S1, the gas nozzle 11 is changed. In a second method step S2, the insert 17 is changed. The gas nozzle 11 can be changed before use 17 or vice versa. Finally, the fuel gas is changed in a method step S3.

Reference symbols used:

1

Gas stove

2

Gas stove

3

Cooktop pan

4th

Gas burner arrangement

5

Gas control valve

6th

Main gas line

7th

Supply line

8th

Gas burner

9

Burner base

10

Base section

11

Gas nozzle

12

Mixing tube receiving section

13

Mixing tube

14th

Burner top

15th

Gas outlet opening

16

Central axis

17th

commitment

18th

Top

19th

Base section

20th

Support flange

A.

Flow cross-sectional area

L.

Primary air

Claims (8)

1. Gas burner (8) for a gas cooker (1), with a mixing tube (13) for mixing fuel gas with primary air (L), a gas nozzle (11) which is designed to inject the fuel gas into the mixing tube (13), and an insert (17) which can be inserted herein and replaced in order to change a geometry of the mixing tube (13), wherein the gas nozzle (11) and the insert (17) are received in a burner lower part (9) of the gas burner (8), characterised in that the burner lower part (9) is embodied in two parts, wherein the burner lower part (9) comprises a base segment (10), in which the gas nozzle (11) is received, and a mixing tube receiving segment (12), which receives the mixing tube (13).
2. Gas burner according to claim 1, characterised in that the insert (17) is tube-shaped.
3. Gas burner according to claim 1 or 2, characterised in that a flow cross-sectional surface (A) of the mixing tube (13) can be changed with the aid of the insert (17).
4. Gas burner according to claim 1, characterised in that the insert (17) can be inserted into the mixing tube (13) from a top side (18) of the burner lower part (9) and can be removed herefrom.
5. Gas burner according to claim 4, characterised in that the insert (17) has a peripheral support flange (20) which is designed to rest on the top side (18) of the burner lower part (9).
6. Gas hotplate (2) with at least one gas burner (8) according to one of claims 1 - 5, and at least one gas control valve (5) for regulating a flow of fuel gas to the at least one gas burner (8).
7. Gas cooker (1) with at least one gas burner (8) according to one of claims 1 - 5, and/or a gas hotplate (2) according to claim 6.
8. Method for replacing the fuel gas of a gas burner (8) according to one of claims 1 - 5, which has a mixing tube (13) for mixing the fuel gas with primary air (L), a gas nozzle (11), which is designed to inject the fuel gas into the mixing tube (13), and an insert (17) which can be inserted herein and replaced in order to change a geometry of the mixing tube (13), with the following method steps:

   replacing (S1) the gas nozzle (11);

   replacing (S2) the insert (17); and

   replacing (S3) the fuel gas.

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