EP3102880B1 - Gas burner, cooktop and range - Google Patents

Description

The present invention relates to a gas burner arrangement, a hotplate and a stove.

A hotplate can have a gas burner arrangement with a gas valve, a gas burner and a feed line connecting the gas valve with the gas burner. Furthermore, the gas burner arrangement can comprise a thermocouple for flame monitoring a flame of the gas burner. As soon as heat is applied to the thermocouple by the flame of the gas burner, this supplies a solenoid valve of the gas valve with electrical voltage. If the flame goes out, the thermocouple cools down and no longer applies electrical voltage to the solenoid valve. The solenoid valve closes the gas valve to interrupt the flow of fuel gas from the gas valve to the gas burner. This prevents unwanted combustion of unburned fuel gas.

The EP 1 251 316 B1 describes a gas burner arrangement with a plurality of gas burners and a plurality of gas valves, a mechanically actuable switch being provided in an electrical connection between a respective thermocouple of a gas burner and the gas valve. The mechanically actuated switches of all gas burners are mechanically coupled to one another by means of a connecting piece. By actuating the connector, all switches are opened at the same time.

The DE 200 00 259 U1 describes a gas stove top. The upper part of the gas stove includes an on-off switch, with the help of which all burners of the upper part of the gas stove can be switched off immediately by closing the corresponding safety valves.

The WO 2007/020178 A1 describes a time control for a gas hob. The gas hob includes a main switch, when actuated, a gas supply to gas burners of the gas hob is interrupted.

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

Accordingly, a gas burner arrangement for a hotplate with at least two gas burners, to which a gas valve for regulating a fuel gas flow to the gas burner and a thermocouple for flame monitoring of a flame of the gas burner is assigned, is proposed. Each thermocouple is coupled to the gas valve assigned to it with the aid of an electrical circuit in such a way that when the flame of the gas burner goes out, the fuel gas flow to the gas burner is interrupted with the aid of the gas valve, each electrical circuit having an electrically actuable switch, the electrically actuable switch Switches for interrupting the electrical circuits between the thermocouples and the gas valves can be controlled with the aid of a common control device, and the electrically actuable switches are closed in an initial state. When the flame of the gas burner is detected, the thermocouple is set up to transmit a continuous signal to the gas valve assigned to it, the thermocouple being set up to interrupt the continuous signal when the flame of the gas burner goes out, so that the gas valve connects the fuel gas flow to the Gas burner interrupts. The electrically actuable switch is set up to interrupt the continuous signal of the thermocouple, so that the gas valve interrupts the fuel gas flow to the gas burner.

The common control device is in particular set up to interrupt the electrical circuits at the same time. Because the switches can be actuated electrically and can be controlled jointly with the aid of the common control device, a mechanical connection of the switches can be dispensed with. This results in less wear on the switches compared to known arrangements. Furthermore, the electrically operated switches can be easily encapsulated so that they are not contaminated or damaged. In addition, by eliminating the mechanical coupling of the switches to one another, they can be positioned anywhere. This increases the degrees of freedom in the structural design of the gas burner arrangement.

The thermocouple is set up to transmit a continuous signal to the gas valve assigned to it when the flame of the gas burner is detected, the thermocouple being set up to transmit the continuous signal when the To interrupt the flame of the gas burner so that the gas valve interrupts the fuel gas flow to the gas burner.

In particular, the thermocouple generates an electrical voltage when exposed to heat. A solenoid valve of the gas valve is controlled with the electrical voltage. The solenoid valve is usually closed, ie when there is no voltage on it. As soon as the thermocouple generates a voltage, the solenoid valve is opened and the fuel gas flow from the gas valve to the gas burner is released. If the burner flame goes out, the thermocouple no longer generates an electrical voltage and the solenoid valve of the gas valve is closed in order to interrupt the flow of fuel gas to the gas burner.

The electrically actuable switch is set up to interrupt the continuous signal of the thermocouple, so that the gas valve interrupts the fuel gas flow to the gas burner.

The electrically actuable switch is in particular set up to interrupt the electrical circuit even when the thermocouple does not transmit a continuous signal to the gas valve.

According to a further embodiment, the common control device is arranged directly on the gas valves.

This results in a particularly compact construction of the gas burner arrangement.

According to a further embodiment, the common control device has a printed circuit board on which the electrically actuable switches are arranged.

The electrically operated switches are clipped into the circuit board, for example. The circuit board can be connected to valve housings of the gas valves. In particular, the circuit board can be clamped or screwed onto the valve housing.

According to a further embodiment, the electrically actuable switches are relays.

This results in a particularly inexpensive and simple construction of the gas burner arrangement. The electrically actuated switches are particularly attached to the valve housings of the gas valves. For example, the electrically actuable switches, in particular housings of the electrically actuable switches, are clamped onto the valve housing.

According to a further embodiment, the electrically operated switches are electronically operated switches.

An electronically actuated switch is an electronic component that realizes the function of a switch in the form of a semiconductor component. The electronically operated switch can also be referred to as an electronic switch. Examples of electronically actuated switches are analog switches or semiconductor switches. This results in a particularly low-wear construction of the gas burner arrangement. This increases the life of the gas burner assembly.

According to a further embodiment, each electrically actuable switch is fastened to a valve housing of a respective gas valve.

In particular, each electrically actuable switch is clamped on the valve housing.

According to a further embodiment, the common control device has a button for switching the electrically actuable switches.

The button is in particular a hand switch. With the help of the button, the common control device can be controlled in such a way that it opens the electrically actuable switches all at the same time.

The electrically actuable switches are closed in an initial state.

The initial state can also be referred to as the default state. As a result, the functionality of a stove with such a gas burner arrangement is further ensured even in the event of a malfunction of one of the electrically actuated switches.

Furthermore, a hotplate with such a gas burner arrangement is proposed. The hotplate can be part of a household appliance.
Furthermore, a stove with such a gas burner arrangement and / or such a hotplate is proposed. The stove is particularly a household appliance.

Further possible implementations of the invention defined in the claims 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 form of the invention.
Further advantageous refinements and aspects of the invention are the subject of the subclaims and of the exemplary embodiments described below

• Fig. 1 zeigt eine schematische Aufsicht einer Ausführungsform einer Kochstelle;
• Fig. 2 zeigt eine schematische Seitenansicht einer Ausführungsform einer Gasbrenneranordnung der Kochstelle gemäß der Fig. 1;
• Fig. 3 zeigt eine schematische perspektivische Ansicht der Kochstelle gemäß der Fig. 1; und
• Fig. 4 zeigt eine weitere schematische perspektivische Ansicht der Kochstelle gemäß der Fig. 1.

Invention. The invention is explained in more detail below on the basis of preferred embodiments with reference to the attached figures.

• Fig. 1 shows a schematic plan view of an embodiment of a hotplate;
• Fig. 2 shows a schematic side view of an embodiment of a gas burner arrangement of the hotplate according to the Fig. 1 ;
• Fig. 3 shows a schematic perspective view of the hotplate according to the Fig. 1 ; and
• Fig. 4 shows a further schematic perspective view of the hotplate according to the Fig. 1 .

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 view of a stove 1. The stove 1 is in particular a gas stove. The cooker 1 is a household appliance. The cooker 1 has a hotplate 2 with a gas burner arrangement 3. The gas burner arrangement 3 has at least two gas burners 4-8. The number of gas burners 4 - 8 is unlimited. As the Fig. 1 shows, the gas burner arrangement 3 can have five gas burners 4-8. A gas valve 9-13 is assigned to each gas burner 4-8. The gas valves 9-13 are preferably gas control valves. The gas valves 9-13 are set up to regulate or optionally interrupt a fuel gas flow or gas volume flow to the respective gas burner 4-8. Each gas valve 9-13 is attached to a main gas line 14. The gas valves 9-13 are preferably connected to the main gas line 14.

Each gas burner 4-8 is fluidly connected by means of a feed line 15-19 to the gas valve 9-13 assigned to it. A thermocouple 20 - 24 is also assigned to each gas burner 4 - 8 ( Fig. 4 ). Each thermocouple 20-24 is arranged adjacent to the gas burner 4-8 assigned to it. In the Fig. 4 the thermocouples 20-24 are shown in an unmounted state, that is, the Thermocouples 20 - 24 are in the Fig. 4 not yet arranged adjacent to the gas burner 4 - 8 assigned to it. For example, the thermocouples 20-24 can each be clamped to a burner housing of the corresponding gas burner 4-8 or otherwise firmly connected to it. Each thermocouple 20 - 24 is set up to a flame 25 ( Fig. 2 ) of the gas burner 4 - 8 assigned to the respective thermocouple 20 - 24.

As the Fig. 2 and 4th show, each thermocouple 20-24 is coupled to its associated gas valve 9-13 by means of an electrical circuit 26-30 such that when the flame of the gas burner 4-8 is extinguished, the fuel gas flow to the gas burner 4-8 is by means of the gas valve 9-13 is interrupted. In particular, the thermocouple 20-24 generates an electrical voltage when the flame 25 is present on the gas burner 4-8, with the aid of which the gas valve 9-13 is kept in an open state. For this purpose, the gas valve 9-13 can comprise a solenoid valve. As soon as the flame 25 of the gas burner 4-8 extinguishes, an electromagnet of the solenoid valve is no longer energized and the gas valve 9-13 interrupts the flow of fuel gas to the gas burner 4-8. Each electrical circuit 26-30 has an electrically actuable switch 31- 35 ( Fig. 2 , 3rd and 4th ) on. The electrically actuable switches 31-35 can be relays, for example. Alternatively, the electrically actuated switches 31-35 can be electronically actuated switches.

In an initial state or default state, the electrically operable switches 31-35 are closed. As the Fig. 1 and 3rd show, the gas burner arrangement 3 has a common control device 36 for the common and in particular simultaneous actuation of the electrically actuable switches 31-35. The electrically actuable switches 31-35 can thus be controlled to interrupt the electrical circuits 26-30 using the common control device 36.

The thermocouple 20-24 is set up to transmit a continuous signal to the gas valve 9-13 assigned to it when the flame 25 of the gas burner 4-8 is detected. The thermocouple 20-24 is further configured to interrupt the continuous signal when the flame 25 of the gas burner 4-8 goes out, so that the gas valve 9-13 interrupts the fuel gas flow to the gas burner 4-8. The electrically actuable switch 31-35 of each electrical circuit 26-30 is for this purpose set up to interrupt the continuous signal of the thermocouple 20-24 so that the gas valve 9-13 interrupts the fuel gas flow to the gas burner 4-8. As the Fig. 1 and 3rd show, the common control device 36 is arranged directly on the gas valves 9-13.

As the Fig. 3 shows, the common control device 36 has a circuit board 37 on which the electrically actuable switches 31-35 can be arranged. In particular, the circuit board 37 is attached to the gas valves 9-13. For example, the circuit board 37 is clamped or screwed to the gas valves 9-13. Each electrically actuable switch 31-35 is connected to a valve housing 38-42 ( Fig. 4 ) of a respective gas valve 9-13 attached. For example, the electrically actuable switches 31-35 can be clamped to the respective valve housings 38-42.

As the Fig. 1 , 3rd and 4th show, the common control device 36 for switching the electrically actuable switches 31-35 has a common button 43. The button 43 is in particular a hand switch. With the help of the button 43, all the switches 31-35 can be switched simultaneously.

The mode of operation of the gas burner arrangement 3 is explained below. When the gas burners 4-8 are in operation, the respective thermocouple 20-24 detects the flame 25 on the gas burners 4-8 flows to the respective gas burner 4 - 8. By actuating the button 43, all normally closed electrically actuable switches 31-35 are opened, so that the signal from the thermocouple 20-24 is no longer transmitted to the respective solenoid valve of the gas valves 9-13. The gas valves 9-13 interrupt the fuel gas flow from the main gas line 14 to the respective gas burner 4-8. The flames 25 of the gas burners 4-8 extinguish. The button 43 is thus an emergency stop switch for the hotplate 2.

Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

Reference symbols used:

1

stove

2nd

Hotplate

3rd

Gas burner arrangement

4th

Gas burner

5

Gas burner

6

Gas burner

7

Gas burner

8th

Gas burner

9

Gas valve

10th

Gas valve

11

Gas valve

12th

Gas valve

13

Gas valve

14

Main gas line

15

Supply

16

Supply

17th

Supply

18th

Supply

19th

Supply

20

Thermocouple

21

Thermocouple

22

Thermocouple

23

Thermocouple

24th

Thermocouple

25th

flame

26

circuit

27

circuit

28

circuit

29

circuit

30th

circuit

31

switch

32

switch

33

switch

34

switch

35

switch

36

Control device

37

Circuit board

38

Valve body

39

Valve body

40

Valve body

41

Valve body

42

Valve body

43

Button

Claims (9)

1. Gas burner arrangement (3) for a cooking zone (2), with at least two gas burners (4 - 8), which are each assigned a gas valve (9 - 13) for regulating a flow of combustion gas to the gas burner (4 - 8) and a thermocouple (20 - 24) for flame monitoring of a flame (25) of the gas burner (4 - 8), wherein each thermocouple (20 - 24) is coupled to the gas valve (9 - 13) assigned to it with the aid of an electrical circuit (26 - 30) in such that way that when the flame (25) of the gas burner (4 - 8) is extinguished, the flow of combustion gas to the gas burner (4 - 8) is interrupted with the aid of the gas valve (9 - 13), wherein each electrical circuit (26 - 30) has an electrically operable switch (31 - 35), wherein the electrically operable switches (31 - 35) can be actuated to interrupt the electrical circuits (26 - 30) between the thermocouples (20 - 24) and the gas valves (9 - 13) with the aid of a common control facility (36), wherein the electrically operable switches (31 - 35) are closed in an initial state, wherein the thermocouple (20 - 24) is configured, when the flame (25) of the gas burner (4 - 8) is detected, to transfer a continuous signal to the gas valve (9 - 13) assigned to it, wherein the thermocouple (20 - 24) is configured to interrupt the continuous signal when the flame (25) of the gas burner (4 - 8) is extinguished, so that the gas valve (9 - 13) interrupts the flow of combustion gas to the gas burner (4 - 8), and wherein the electrically operable switch (31 - 35) is configured to interrupt the continuous signal of the thermocouple (20 - 24), so that the gas valve (9 - 13) interrupts the flow of combustion gas to the gas burner (4 - 8).
2. Gas burner arrangement according to claim 1, characterised in that the common control facility (36) is arranged directly at the gas valves (9 - 13).
3. Gas burner arrangement according to claim 1 or 2, characterised in that the common control facility (36) has a circuit board (37), on which the electrically operable switches (31 - 35) are arranged.
4. Gas burner arrangement according to one of claims 1 - 3, characterised in that the electrically operable switches (31 - 35) are relays.
5. Gas burner arrangement according to one of claims 1 - 4, characterised in that the electrically operable switches (31 - 35) are electronically operable switches.
6. Gas burner arrangement according to one of claims 1 - 5, characterised in that each electrically operable switch (31 - 35) is fastened to a valve housing (38 - 42) of a respective gas valve (9 - 13).
7. Gas burner arrangement according to one of claims 1 - 6, characterised in that the common control facility (36) has a button (43) for switching the electrically operable switches (31 - 35).
8. Cooking zone (2) with a gas burner arrangement (3) according to one of claims 1 - 7.
9. Cooker (1) with a gas burner arrangement (3) according to one of claims 1 - 7 and/or a cooking zone (2) according to claim 8.

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