WO2012011032A1 - Gas hob - Google Patents

Abstract

The invention relates to a gas hob (1) comprising multiple gas burners (4, 5, 6, 7), a mechanical main valve (3) for blocking or passing a gas flow to the gas burners (4, 5, 6, 7), said main valve being coupled to a gas connecting line (2), and an electromagnet arrangement (9) for actuating the main valve (3). The electromagnet arrangement (9) is mechanically coupled to the main valve (3) in a removable manner.

Description

 Gas cooktop

The present invention relates to a gas hob with a plurality of gas burners.

Gas stoves or built-in kitchens with countertops often include gas hobs that are either inserted into a gas stove or embedded in a worktop. Usually, a metal tray is used, in which the gas burners are used. Below the gas burners and the cooking surface then run the valves for controlling the gas supply to the individual burners. The available space is usually very limited. This is especially true if a gas hob is to be installed in built-in kitchens and cabinets.

From WO2009 / 037132, for example, a gas cooking apparatus arrangement is known in which a main valve unit is provided as an interface to a gas supply line of the gas range. A corresponding main valve unit controls the supply of gas to individual burner valve units and provides an additional safety device for the automatic blocking of a gas supply in case of malfunction of one or more burners. Another main valve is described in WO 2009/146730, which is designed with an electrically operated valve member and wherein the inlet and outlet ports are either coaxially offset or perpendicular to each other. Most solenoid valves are used as main valves, which are operated either with DC or AC voltage. Corresponding known solenoid valves are not flexible and usually do not meet the requirements of the given in hobs cramped space specifications. It is therefore an object of the present invention to provide an improved gas hob.

This object is achieved by a gas hob with the features of claim 1.

Accordingly, a gas hob is proposed which a plurality of gas burners, a coupled to a gas supply line main mechanical valve for blocking or Passing a gas flow to the gas burners and a solenoid assembly for actuating the main valve comprises. Preferably, the solenoid assembly is mechanically releasably coupled to the main valve.

In the gas hob, it is advantageous that the mechanical main valve and the solenoid assembly are designed to operate it separately and individually. It is thereby possible to couple different solenoid assemblies, for example either DC or AC, to the main mechanical valve. The coupling is preferably carried out mechanically, for example by means of a lever mechanism, a transmission or the like.

For example, the solenoid assembly and the main valve are coupled together by means of a linkage or a pin.

In one embodiment, the solenoid assembly includes a housing separate from the main valve for a solenoid. In particular, a valve body may be embodied in a different material from the housing of the electromagnet.

In one embodiment, the main valve is arranged in the manner of an angle valve in the region of a corner of the gas hob. Here are an inflow, an outflow and a valve plunger of the main valve perpendicular to each other. The valve stem opens or closes depending on its position a flow cross-section of the main valve. The central axes of the inflow and outflow are then offset from one another.

In this embodiment results in a favorable geometry and compact design of the main valve, whereby the gas hob can be made flat and space-saving. Preferably, the valve stem is guided in a valve chamber, which connects the inflow and outflow together. The valve chamber is designed, for example, cylindrical and can with a valve stem, according to the Geometry of the valve chamber is adapted to open or release a cross section of the chamber and thus determine a gas flow.

Preferably, the inflow is directed at the intended installation of the gas hob down. For example, the gas hob may be provided with a formed on its underside in the region of a corner valve. Then, preferably, an inflow port is directed downwardly, and a valve stem axis and a center axis of the outflow port are perpendicular to each other and form a corner which is parallel to the corner of the outer contours of the gas hob. In an alternative embodiment of the gas hob, the main valve is equipped with an inflow and an outflow, which are arranged coaxially with each other. This means, for example, that a central axis of the Einströmstutzens, which may be tubular, and a central axis of the Ausströmstutzens, which may also be tubular, coincide and form a coaxial axis. Between the inflow and the outflow, a valve portion may be provided which forms a valve chamber.

In the case of the coaxial design of inflow and outflow nozzles, a valve stamper is preferably provided for changing a flow cross-section of the main valve, the valve stamper intersecting the coaxial axis of the inflow stub and the outflow stub at an angle which is smaller than 90 °. This makes it possible to achieve a particularly compact and space-saving design of the main valve and thus an improved hob. In one embodiment, the inflow or the outflow is equipped with a threaded connection, for example, for connection to a gas connection line or to a gas cooktop internal gas line to the gas burners.

The inflow or outflow can also have a connector, a quick-connection connection or a bayonet connection. The threaded connection, the connector, the quick-connection connection or the bayonet connection are gas-tight. There are a number of so-called Quick Connection connections, so quick connector, known, which are used in gas fittings. Preferably, the connector, the quick connection connection or the bayonet connection is designed such that a rotation of the main valve about a common coaxial axis of the inflow and the outflow is gas-tight. This makes it easier to install the main valve in a prefabricated gas hob with supply and discharge for gas. It is in fact possible, on the one hand, to carry out the main valve on a first connecting piece with a thread which is easy to produce, and on the other hand to equip the second, other connecting piece with a connection enabling rotation about the longitudinal axis of the main valve. Then the main valve can be easily installed adapted to the installation conditions with regard to its orientation about the longitudinal axis.

For example, in a gas hob, a coaxial axis of the inflow and outflow stubs and the valve stems extend in a plane. This level is preferably below and parallel to a cooking surface of the gas hob. The cooking surface is understood to be the plane on which the cookware is placed on the gas burners, for example with the aid of pan supports.

In yet another embodiment, depending on a position of the valve stem, a flow cross-section of a valve section, which connects the inflow pipe and the outlet pipe, can be changed. In this case, the valve stem is guided in a direction to a coaxial axis of the inflow and the Ausströmstutzens, and the direction includes with the coaxial axis at an angle between 45 ° and 90 °. In the gas hob, the valve stem is preferably mechanically coupled to the solenoid assembly. In this case, preferably a releasable connection between, for example, a shaft of the valve stem and a connecting piece of the electromagnet assembly is installed. Further possible implementations of the invention also include not explicitly mentioned combinations of features described above or below with regard to the exemplary embodiments. The expert will also consider individual aspects as an gene or supplements to the respective basic shape of the pot carrier or the cooking area.

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.

1 shows a schematic representation of a first embodiment of a gas hob in plan view;

Figure 2 is a perspective view of the first embodiment of the gas hob;

Figure 3 is a perspective view of a section of the first embodiment of the gas hob with a main valve;

Figure 4 cross-sectional views of a first embodiment of a main valve for a gas hob;

Figure 5 is a schematic representation of a second embodiment of a gas hob in plan view; Figure 6 is a perspective view of a section of the second embodiment of the gas hob with a main valve; and

Figure 7 cross-sectional views of a second embodiment of a main valve for a gas hob.

In the figures, identical or functionally identical elements are provided with the same reference numerals, unless stated otherwise. 1 shows a schematic representation of a first embodiment of a gas hob in plan view. Most gas hobs are rectangular and are used in a built-in closet. The gas hob 1 in this case comprises a plurality of burner devices 4, 5, 6, 7, which are indicated by dashed lines in the figure 1 only schematically. Internally, a gas supply line 25 is provided, run from the distribution lines 8 to the gas burners 4, 5, 6, 7, to supply them with combustion gas. Other control valves, for example, to adjust the performance of the individual burners during the cooking process, are not explicitly shown here.

The interface between an external gas connection 2 and the internal gas supply line 25 is provided by a main valve 3. The main valve 3 is used for safe operation of the gas hob or the gas hob. In case of a malfunction interrupts, for example triggered by a suitable control, the main valve 3 a gas flow to the gas burners 4, 5, 6, 7. The actuation of the main valve 3, which is carried out completely mechanically, via an electromagnet assembly 9, which mechanically to the mechanical main valve 3 is coupled. The solenoid assembly 9 and the main valve 3 are separate components.

FIG. 2 shows a perspective view of the gas hob from its underside. The gas hob 1 essentially comprises a sheet metal trough 1 1, in which the gas burners are mounted from above O. On the bottom, which is visible in perspective in Figure 2, supply lines, fittings such as control valves and the main valve are provided. The embodiment of a gas hob 1 in Figure 2 has a corner valve 12 as the main valve. It recognizes a downwardly directed U inflow 10, which is coupled, for example, to an external gas supply line. At right angles to the inflow neck 10, a discharge nozzle 13 extends. It can be seen in Figure 2 also the valve body 18 connecting these two nozzles.

FIG. 3 shows an enlarged detail of the cooktop from below. In this case, one recognizes the mechanical main valve 12 with its valve body 18, which comprises a valve chamber, as described below, which connects the inflow pipe 10 and the exhaust pipe 13 with one another, so that a gas flow is possible in the opened state of the valve. It can also be seen a shaft 17 which coincides with a in the 3 unrecognizable valve stamper is connected, and its position determines a flow area within the valve body 18.

Furthermore, an electromagnet arrangement 9 is provided, which is mechanically connected to the shaft 17 via an arm 19 as a coupling means. By operating or activating the electromagnet 9, the shaft 17 is inserted or withdrawn into the valve 12. That is, the valve 12 releases a flow or blocks a gas flow. It can be seen that the electromagnet arrangement 9 comprises a housing 30 which is separated from the main valve body 3. In the housing 30, the actual electromagnet, which is not visible here, installed.

FIG. 4 shows cross-sectional views in detail of a main valve designed as an angle valve. FIG. 4A shows a side view of the main valve 12 in blocking operation, that is to say in the closed state. FIG. 4B shows the same sectional view in the opened state. It can be seen a valve body 18 which forms a valve chamber 24 in the interior. To the valve chamber 24 performs a Einströmstutzen 10, which is rohrformig and a discharge nozzle 13, which is also rohrformig.

There is a Einströmstutzenachse 14 and a Ausströmstutzenachse 15 indicated. These axes 14, 15 are perpendicular to each other. Into the valve chamber 24, a valve temple 16 is inserted, which is guided along its valve stem axis 21 in the valve chamber 24. The valve stem 16 is provided with a valve stem 17, which is mechanically coupled via a coupling means, such as a clamp or a lever 19 to a connector 20 of an electromagnet assembly, not shown here.

The valve chamber 24 is closed by a plug 23 having an opening for guiding the valve body shaft 17. In the orientation of Figures 4A and 4B and a proper installation orientation of the valve 12, the Einströmstutzen 10 down U. It can be seen that in the blocking operation, as shown in Figure 4A, the gas G of the valve stem 16, the one Closing opening of the valve chamber 24 to the inflow, is blocked. Thus, no gas G passes through the valve chamber 24 to the outflow 13th In FIG. 4B, the valve stem 16 is partially withdrawn from the valve chamber 24 and releases an opening from the inflow pipe 10 into the valve chamber 24, so that the gas G can flow through the valve chamber 24 and reaches the outlet pipe 13. The removal or the mechanical movement of the valve stem 16 via its shaft 17 is effected by a mechanical coupling of the movement of an electromagnet, not shown here. The connection to the electromagnet is designed releasably, so that various available electromagnet arrangements can be used. Further, the valve stem 16 is provided with a sealing ring 22 which presses on a bearing surface 29 of the valve chamber 24 in the closed state and sealingly closes.

FIGS. 4C and 4D show the main valve 12 in the form of an angle valve in plan view. That is, it is from the top (practically through the metal sheet of the trough 1 shown in Figure 3 1) looked at the main valve 12. 4C again shows the blocking state of the main valve 12 shown in FIG. 4A. FIG. 4D corresponds to the position of the valve stem, as shown in FIG. 4B. It can be seen, with reference to FIGS. 4A-4D, that on the one hand the central axis 15 of the outflow nozzle 13 and the central axis 14 of the inflow nozzle 10 are perpendicular to one another and, on the other hand, that the central axis 21 of the valve stem 16 and of the valve stem 17 are vertical. The respective center axes of the inflow neck 10, the outflow neck 13 and the valve stem, ie the valve movement, form a right-angled tripod.

FIG. 5 schematically shows a second embodiment of a gas cooktop in plan view. In this case, a main gas line 2, 25 runs parallel to one side of the cooktop 1. The main gas line 2, 25 is interrupted by the main valve 3, which is actuated by means of an electromagnet arrangement 9. Furthermore, again four gas burners 4, 5, 6, 7 are schematically indicated, which are connected via supply lines 8 with the gas supply line 25 present downstream of the main valve 3. FIG. 6 shows a perspective cutaway view of the underside of the cooktop with a second embodiment of a main valve. 6 shows the main gas line sections 2, 25 and the main valve 26. The outlet connection is coupled to the gas supply line 25, which supplies the gas burners provided with gas. provides. It also recognizes one of the main gas line 2, 25 arranged angled valve stem 17 which is mechanically connected via a linkage to an axis or a fitting of the provided in a separate housing 30 electromagnet 9. By actuating the electromagnet 9, the shaft 17 is pressed or pulled out into the valve body 18. Depending on its position results in an open or closed valve state for the gas flow.

FIG. 7 shows the second embodiment of the main valve in cross section. In the orientation of Figures 5 and 6 can be seen from below on the main valve. The main valve comprises a valve body 18, which forms a valve chamber 24A, 24B, which can be closed by a valve stem 16. The valve body 18 is adjoined by an inlet connection piece 10 equipped with a connection thread and a discharge connection piece 13 equipped with a quick connector 27.

The central axis 14 of the Einströmstutzens 10 and the central axis 15 of the Ausströmstutzens 13 extend coaxially, so falling on each other. The direction of movement of the valve stem 16 and its shaft 17 and the central axis 21 of the valve stem cuts this coaxial axis, ie the common axis 14, 15 of inflow and outflow at an angle which is smaller than 90 °. By adjusting the angle, for example, at a particularly acute angle, the main valve 26 can be designed to save space.

It can be seen in Figure 7A, the closed state of the main valve, that is, the valve stem lies on a support surface 29 in the cross section of the valve body 18 and sealingly closes, for example, provided with a ring seal 22 from. That is, the inflow port 10 is separated gas-tight from the discharge port 13.

FIG. 7B shows the main valve 26 in the opened state. The valve stem 16 is pulled out of its closed position along the shaft axis 21 and thus releases an opening between a left portion 24A of the valve chamber and a right portion 24B of the valve chamber. One recognizes a gas flow along the arrows in FIG. 7B. The coaxial design of a main valve allows easy use in a straight, for example, parallel to one side of the hob, extending main gas line. In addition, the installation of a corresponding main valve 26 is facilitated by the configuration of the connecting means to the connecting piece. For example, in the embodiment of FIG. 7, the inflow pipe 10 is provided with a thread 28, so that a gas-tight connection to the inlet pipe 2 can be made easily via a suitably configured sleeve. Threads are particularly cheap and easy to manufacture. The outlet 13 is equipped with a quick connector, for example with a snap or clamping mechanism 27. This allows a quick connection of the internal gas distribution pipe 25, which is equipped with a correspondingly compatible connection piece. In particular, the combination of a thread 28 on the one hand and a quick connector 27 on the other hand allows even in the installation situation, a rotation of the main valve to the coaxial axis 14, 15. It is thus particularly easy to use the main valve 26 in an existing or prefabricated cooktop and the spatial Adapt conditions.

The proposed gas hobs with main valves, the mechanics of which is made separately from an electromagnet assembly and used, is particularly cost effective and inexpensive to produce. Furthermore, the non-integrated design of the main valve, ie without integrated electromagnet, allows flexible use. In particular, it is possible to use known electromagnetic actuators which are operated either with direct current or with alternating current. The proposed valve designs are particularly space-saving, inexpensive and easy to use in cramped conditions of gas hob arrangements. Used reference signs:

1 gas hob

2 gas connection line

3 main valve

4, 5, 6, 7 gas burners

8 gas supply

9 electromagnet arrangement

10 inflow nozzles 1 1 sheet metal tray

 12 main valve

 13 outlet nozzles

14 inlet nozzle axis

15 outflow nozzle axis

16 valve stamp

17 valve stem

 18 valve body

 19 coupling agent

20 electromagnetic pin

21 shaft axis

 22 sealing ring

 23 valve plugs

 24 valve chamber

25 gas supply

 26 main valve

 27 Quick Connector

28 threads

 29 valve area

 30 housing

 G gas

 U bottom

 0 top

Claims

1. Gas hob (1) with a plurality of gas burners (4, 5, 6, 7), a to a gas supply line (2) coupled mechanical main valve (3) for blocking or passing a gas flow to the gas burners (4, 53, 6, 7) , and with a solenoid assembly (9) for actuating the main valve (3), wherein the solenoid assembly (9) is releasably mechanically coupled to the main valve (3). 2. Gas hob (1) according to claim 1, characterized in that the solenoid assembly (9) and the main valve (3) by means of a linkage or a pin (20) are coupled together. 3. Gas hob (1) according to claim 1 or 2, characterized in that the electromagnet arrangement (9) comprises a separate from the main valve (3) housing (30) for an electromagnet. 4. Gas hob (1) according to any one of claims 1-3, characterized in that the main valve (3) in the manner of an angle valve (12) in the region of a corner of the gas hob (19 is arranged, wherein an inflow (10), a Outlet (13) and a valve stem (16), which opens a flow cross-section of the main valve (3) depending on its position or closes, perpendicular to each other, wherein the central axes (14, 15) of the Einströmstutzens (10) and the Ausströmstutzens (13) are arranged offset from one another. 5. Gas hob (1) according to claim 4, characterized in that the Einströmstut- zen (10) at the intended installation of the gas hob (1) facing down. 6. Gas hob (1) according to claim 4 or 5, characterized in that the main valve (26) comprises an inflow (10) and an outflow (13), which are arranged coaxially with each other. 7. Gas hob (1) according to any one of claims 4-6, characterized in that the main valve (26) has a valve stem (16) for changing a Durchströmungsquer- Section, wherein the valve stem (16) at an angle less than 90 degrees a coaxial axis of the inflow (10) and the Ausströmstutzens (15) intersects. 8. Gas hob (1) according to any one of claims 4-7, characterized in that the inflow (10) or the outflow (13) has a threaded connection (28) (for connection to the gas connection line (2) or to a gas cooktop internal gas line (8 ) to the gas burners). 9. Gas hob (1) according to any one of claims 4-8, characterized in that the inflow (10) or the outflow (13) has a connector, a quick connection connection (27) or a bayonet connection. 10. gas hob (1) according to claim 9, characterized in that the connector, quick connection connection (27) or the bayonet connection, a rotation of the main valve (26) about a common coaxial axis of the Einströmstutzens (10) and the Ausströmstutzens (15) allows. 1 1. Gas hob (1) according to any one of claims 4 - 10, characterized in that a coaxial axis of the Einströmstutzens (10) and the Ausströmstutzens (15) and the valve stem (16) lie in a plane which below and parallel to a Kochflä - the gas hob (1) runs. 12. Gas hob (1) according to any one of claims 7 - 1 1, characterized in that in dependence on a position of the valve stem (16) has a flow cross-section of a valve portion (24) which the inflow (10) and the outflow (13 ), and wherein the valve stem (16) is guided in a direction to a coaxial axis of the inflow neck (10) and the Ausströmstutzens (13), which forms an angle between 90 degrees and 45 degrees with the coaxial axis. 13. Gas hob (1) according to any one of claims 4 - 1 1, characterized in that the valve stem (16) is mechanically coupled to the solenoid assembly (9). 14. Gas hob (1) according to any one of claims 1-13, characterized in that the electromagnet arrangement (9) comprises an AC magnet. 15. Gas hob (1) according to any one of claims 1-13, characterized in that the electromagnet arrangement (9) comprises a DC magnet.