WO2015114496A1

WO2015114496A1 - Gas burner arrangement, cooktop and cooker

Info

Publication number: WO2015114496A1
Application number: PCT/IB2015/050492
Authority: WO
Inventors: Melca Gutierrez Humara; Luis Antonio Palacios Valdueza; Oscar Peña Martín; 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: ES2542254A1; EP3102880B1; EP3102880A1; ES2542254B1

Abstract

The invention relates to a gas burner arrangement (3) for a cooktop (2), comprising at least two gas burners (4-8), a gas valve (9-13) for controlling a combustion gas stream to the gas burner (4-8) and a thermal element (20-24) for monitoring a flame (25) of the gas burner (4-8) being associated with each of said gas burners, wherein each thermal element (20-24) is coupled to the gas valve (9-13) which is associated with it with the aid of an electrical circuit (26-30) in such a way that, when the flame (25) of the gas burner (4-8) is extinguished, the combustion gas stream 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), and wherein the electrically operable switch (31-35) can be driven with the aid of a common control device (36) in order to interrupt the electrical circuits (26-30) between the thermal elements (20-24) and the gas valves (9-13).

Description

Gas burner arrangement, hob and stove

The present invention relates to a gas burner assembly, a cooking station and a stove. A hotplate may include a gas burner assembly having a gas valve, a gas burner, and a supply line connecting the gas valve to the gas burner. Further, the gas burner assembly may include 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, it supplies a solenoid valve of the gas valve with electrical voltage. When the flame goes out, the thermocouple cools down and stops energizing the solenoid valve. The

Solenoid valve closes the gas valve to shut off the fuel gas flow from the gas valve to the gas burner. As a result, an undesirable escape of unburned fuel gas is prevented.

EP 1 251 316 B1 describes a gas burner arrangement with a plurality of gas burners and a plurality of gas valves, wherein a mechanically actuated switch is 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 each other by means of a connector. Actuating the connector opens all switches simultaneously.

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

To provide improved gas burner assembly.

Accordingly, a gas burner assembly for a cooking station with at least two gas burners, each associated with a gas valve for controlling a fuel gas flow to the gas burner and a thermocouple for flame monitoring a flame of the gas burner is proposed. Each thermocouple is coupled to its associated gas valve by means of an electrical circuit such that when extinguishing the flame of the gas burner, the fuel gas flow is interrupted to the gas burner by means of the gas valve, each electrical circuit a having electrically operable switch and wherein the electrically actuated switch for interrupting the electrical circuits between the thermocouples and the gas valves by means of a common control device can be controlled.

The common control device is in particular configured to interrupt the electrical circuits at the same time. The fact that the switches are electrically actuated and can be driven together by means of the common control device, can be dispensed with a mechanical connection of the switch. As a result, a lower wear of the switch is achieved compared to known arrangements. Furthermore, the electrically operated switches are well encapsulated, so that they are not polluted or damaged. In addition, by eliminating a mechanical coupling of the switches with each other, these can be arbitrarily spatially positioned. This increases the degrees of freedom in the design of the

Gas burner assembly. According to one embodiment, the thermocouple is configured to transmit a continuous signal to the gas valve associated therewith upon detection of the flame of the gas burner, wherein the thermocouple is arranged to interrupt the continuous signal when the flame of the gas burner extinguishes, so that the gas valve Fuel gas flow to the gas burner interrupts.

In particular, the thermocouple generates an electrical voltage when exposed to heat. With the electric voltage is a solenoid valve of the

Gas valve controlled. The solenoid valve is usually, that is, when no voltage is applied to this, closed. As soon as the thermocouple generates a voltage, the solenoid valve is opened and the fuel gas stream is released from the gas valve to the gas burner. When the burner flame goes out, the thermocouple no longer generates electrical power and the solenoid valve of the gas valve is closed to shut off the fuel gas flow to the gas burner. According to a further embodiment, the electrically operable switch is arranged to interrupt the continuous signal of the thermocouple, so that the gas valve interrupts the fuel gas flow to the gas burner. The electrically actuated switch is in particular configured to interrupt the electrical circuit even if 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 actuated switches are arranged.

The electrically actuated switches are clipped, for example, in the circuit board. The circuit board may be connected to valve housings of the gas valves. In particular, the circuit board may be clamped or screwed to the valve housing.

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

This results in a particularly cost-effective and simple construction of the

Gas burner assembly. The electrically actuated switches are fastened in particular to the valve housings of the gas valves. For example, the electrically actuated switch, in particular housing of the electrically actuated switch, to the

Valve body clamped.

According to another embodiment, the electrically actuated switches are electronically actuated switches.

An electronically actuated switch is an electronic component that realizes the function of a switch in the form of a semiconductor device. The electronically actuated 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 service life of the gas burner arrangement. According to a further embodiment, each electrically operable switch is attached to a valve housing of a respective gas valve.

In particular, each electrically actuable switch is clamped to the valve housing. According to a further embodiment, the common control device on a button for switching the electrically actuated switch.

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

According to a further embodiment, the electrically actuatable switches are closed in an initial state. The initial state can also be called a default state. As a result, the functionality of a stove with such a gas burner arrangement is further ensured even with a malfunction of one of the electrically actuated switch.

Furthermore, a cooking point is proposed with such a gas burner arrangement. The cooking area can be part of a household appliance.

Furthermore, a stove is proposed with such a gas burner arrangement and / or such a cooking place. The stove is in particular a household appliance. 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 described below Invention. 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 plan view of an embodiment of a cooking area; Fig. 2 shows a schematic side view of an embodiment of a

Gas burner arrangement of the hotplate according to FIG. 1;

Fig. 3 shows a schematic perspective view of the cooking position according to the Fig. 1; and

FIG. 4 shows a further schematic perspective view of the hotplate according to FIG. 1.

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

Fig. 1 shows a schematic plan view of a stove 1. The stove 1 is

in particular a gas stove. The stove 1 is a household appliance. The stove 1 has a cooking station 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 arbitrary. As shown in FIG. 1, the gas burner assembly 3 may have five gas burners 4-8.

Each gas burner 4 - 8 is associated with a gas valve 9 - 13. The gas valves 9-13 are preferably gas control valves. The gas valves 9-13 are adapted to regulate or selectively 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. Preferably, the gas valves 9 - 13 on the main gas line 14th

clamped.

Each gas burner 4 - 8 is connected by means of a supply line 15 - 19 with its associated gas valve 9 - 13 fluidly connected. Each gas burner 4 - 8 is still on

Thermocouple 20 - 24 assigned (Fig. 4). Each thermocouple 20-24 is located adjacent to its associated gas burner 4-8. In Fig. 4 are the

Thermocouples 20 - 24 shown in an unmounted state, that is, the Thermocouples 20-24 are not yet adjacent to the one in FIG

associated gas burner 4 - 8 arranged. For example, the thermocouples 20 - 24 may each be clamped to a burner housing of the corresponding gas burner 4 - 8 or otherwise firmly connected thereto. Each thermocouple 20 - 24 is configured to monitor a flame 25 (FIG. 2) of the gas burner 4 - 8 associated with the respective thermocouple 20 - 24.

As shown in FIGS. 2 and 4, each thermocouple 20-24 is coupled to its associated gas valve 9-13 by means of an electrical circuit 26-30 so that when the flame of the gas burner 4 - 8 extinguishes, the fuel gas flow to the exhaust gas

Gas burner 4 - 8 is interrupted by means of the gas valve 9 - 13. In particular, in the presence of the flame 25 on the gas burner 4 - 8, the thermocouple 20 - 24 generates an electrical voltage by means of which the gas valve 9 - 13 is kept in an open state. For this purpose, the gas valve 9 - 13 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 supplied with voltage and the gas valve 9 - 13 interrupts the fuel gas flow to the gas burner 4 - 8. Each electrical circuit 26 - 30 has an electrically actuated switch 31 - 35 (Figures 2, 3 and 4). The electrically actuated switches 31-35 may be relays, for example. Alternatively, the electrically operable switches 31-35 may be electronically actuatable switches.

In an initial state or default state, the electrically actuated switches 31-35 are closed. As shown in FIGS. 1 and 3, the gas burner arrangement 3 has a common control device 36 for common and in particular simultaneous activation of the electrically actuatable switches 31-35. The electrically actuated switches 31 - 35 are thus controllable to interrupt the electrical circuits 26 - 30 by means of the common control device 36.

The thermocouple 20-24 is adapted to transmit a continuous signal to the associated gas valve 9-13 upon detection of the flame 25 of the gas burner 4-8. The thermocouple 20-24 is further adapted to interrupt the continuous signal upon extinction of the flame 25 of the gas burner 4-8, 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 thereto arranged 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 shown in FIGS. 1 and 3, the common control device 36 is directly to the

Gas valves 9 - 13 arranged. As shown in FIG. 3, the common control device 36 has a printed circuit board 37 on which the electrically actuated switches 31-35 can be arranged.

In particular, the printed 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 operable switch 31-35 is attached to a valve housing 38-42 (FIG. 4) of a respective gas valve 9-13. For example, the electrically actuated switches 31-35 may be clamped to the respective valve housing 38-42.

As shown in FIGS. 1, 3 and 4, the common control device 36 has a common push-button 43 for switching the electrically actuatable switches 31-35. The button 43 is in particular a manual switch. With the help of the button 43, all switches 31 - 35 are simultaneously switchable.

The operation of the gas burner assembly 3 will be explained below. During operation of the gas burners 4-8, the respective thermocouple 20-24 detects the flame 25 at the gas burners 4-8. With the aid of the thermocouple 20-24, the respective one of the two

Solenoid valve of the gas valves 9 - 13 controlled such that fuel gas from the

Main gas line 14 to the respective gas burner 4 - 8 flows. By pressing the button 43, all normally closed electrically actuated

Switch 31-35 open, 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 passage 14 to the respective one

Gas burner 4 - 8. The flames 25 of the gas burners 4 - 8 extinguish. The pushbutton 43 is thus an emergency off switch of the hotplate 2. Although the present invention has been described with reference to exemplary embodiments, it can be varied in many ways. Used reference signs:

1 stove

2 hob

3 gas burner arrangement

4 gas burners

5 gas burners

6 gas burners

7 gas burners

8 gas burners

9 gas valve

10 gas valve

11 gas valve

12 gas valve

13 gas valve

14 main gas line

15 supply line

16 supply line

17 supply line

18 supply line

19 supply line

20 thermocouple

21 thermocouple

22 thermocouple

23 thermocouple

24 thermocouple

25 flame

26 circuit

27 circuit

28 circuit

29 circuit

30 circuit

31 switches

32 switches switch

switch

control device

circuit board

valve housing

button

Claims

1. Gas burner arrangement (3) for a cooking station (2), with at least two gas burners (4-8), each having a gas valve (9-13) for regulating a fuel gas flow to the gas burner (4-8) and a thermocouple (20-18). 24) for flame monitoring of a flame (25) of the gas burner (4 - 8) is associated, each thermocouple (20 - 24) with its associated gas valve (9 - 13) by means of an electrical circuit (26 - 30) is coupled in such a way in that when extinguishing the flame (25) of the

Gas burner (4 - 8) of the fuel gas flow to the gas burner (4 - 8) with the help of

Gas valve (9-13) is interrupted, wherein each electrical circuit (26-30) has an electrically actuated switch (31-35) and wherein the electrically actuated switches (31-35) for interrupting the electrical circuits (26-30) between the thermocouples (20 - 24) and the gas valves (9 - 13) by means of a common control device (36) are controllable.

2. Gas burner assembly according to claim 1, characterized in that the

Thermocouple (20-24) is adapted to transmit a continuous signal to the associated gas valve (9-13) upon detection of the flame (25) of the gas burner (4-8) and that the thermocouple (20-24) is adapted thereto to interrupt the continuous signal upon extinguishment of the flame (25) of the gas burner (4-8), so that the gas valve (9-13) interrupts the fuel gas flow to the gas burner (4-8).

3. Gas burner assembly according to claim 2, characterized in that the electrically actuable switch (31-35) is adapted to interrupt the continuous signal of the thermocouple (20-24), so that the gas valve (9-13) the fuel gas flow to the Gas burner (4 - 8) interrupts.

4. Gas burner arrangement according to one of claims 1 - 3, characterized in that the common control device (36) directly to the gas valves (9 - 13) is arranged.

5. Gas burner arrangement according to one of claims 1 - 4, characterized in that the common control device (36) has a printed circuit board (37) on which the electrically actuated switches (31 - 35) are arranged.

6. Gas burner arrangement according to one of claims 1-5, characterized in that the electrically actuated switches (31 - 35) are relays.

7. Gas burner arrangement according to one of claims 1-5, characterized in that the electrically actuated switches (31 - 35) are electronically actuated switches.

8. Gas burner arrangement according to one of claims 1-7, characterized in that each electrically actuated switch (31 - 35) to a valve housing (38 - 42) of a respective gas valve (9 - 13) is attached.

9. Gas burner arrangement according to one of claims 1-8, characterized in that the common control device (36) has a button (43) for switching the electrically actuated switch (31 - 35).

10. Gas burner arrangement according to one of claims 1-9, characterized in that the electrically actuated switches (31 - 35) are closed in an initial state.

11. cooking station (2) with a gas burner arrangement (3) according to any one of claims 1-10.

12. hearth (1) with a gas burner assembly (3) according to any one of claims 1-10 and / or a cooking point (2) according to claim 1 1.