EP2592352B1 - Gas hob - Google Patents

Description

The present invention relates to a gas hob.

The DE 100 64 450 describes a kitchen furniture with a worktop and a built-in gas hob. The gas hob has a plurality of burners, which are supplied by means of a arranged above the worktop opening with primary air. However, this opening is of aesthetic disadvantage.

The US 2006/0051718 A1 describes a gas hob with a gas burner. The gas burner is supplied with primary air by means of an opening arranged above a worktop.

The JP 2003 083516 A also describes a gas hob with a gas burner. The gas burner is supplied with primary air by means of an opening arranged above a worktop.

The FR 2 650 369 also describes a gas hob with a gas burner. The gas burner is supplied with primary air by means of an opening arranged above a worktop.

The DE 102 37 288 A1 describes a gas hob with a gas burner, wherein in the gas hob a pressure equalization connection is provided, which connects a space below the gas hob with a space above a trough plate.

The WO 0/0444428 A1 describes a gas hob with a gas burner. On the gas cooktop an air guide plate is provided, which is arranged on a well plate, wherein between the air guide plate and the well plate, a gap is formed, which is in communication with the air opening.

The JP 2009 186153 A describes a gas burner with a device for preheating a fuel gas / primary air mixture with the aid of exhaust gas of the gas burner.

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

Accordingly, a gas hob is proposed for a kitchen furniture with a burner and a device for reducing pressure fluctuations in a burner supplied to the primary air flow. The primary air flow can be supplied from below a worktop of the kitchen cabinet. The device reverses a movement component of a flow direction of the primary air flow by means of a labyrinth at least once, wherein the device has an element arranged at least partially in the primary air flow, which is designed to be frictionally movable, and a corresponding coefficient of friction is suitably provided for reducing the pressure fluctuations.

Furthermore, a kitchen furniture with the above gas hob and an interior is proposed. The means for reducing pressure fluctuations is air-conductively connected to the interior to supply the burner with the primary air flow.

Due to the device for reducing pressure fluctuations, a supply of the primary air can be carried out from below the worktop mentioned above. For pressure fluctuations, resulting for example from an opening or closing a drawer or a door below the worktop are buffered by the device and thus remain without significant influence on the burner.

The fact that the supply of primary air can be done from below the worktop, can be aesthetically pleasing solutions.

The device has a labyrinth for reversing a movement component of the flow direction of the primary air flow. In particular, this results in a meanderfömiger gear through which the primary air flow is forced.

In a further embodiment, the device has two comb-like sections which define the labyrinth between them and for this purpose comprise a plurality of teeth which mesh with one another. Thus, the labyrinth can be easily produced. For example, the comb-like portion may have a plurality of teeth, each in a between each two teeth of the other comb-like portion formed gap. In principle, however, it is also possible for the one comb-like section to have only one tooth.

The device has an at least partially disposed in the primary air flow element, which is formed frictionally movable. A corresponding coefficient of friction is provided for reducing the pressure fluctuations suitable. As the element moves under the influence of pressure fluctuations, it reduces pressure fluctuations in a direction toward the burner.

In a further embodiment, the element is designed as a flap, hinged hinged with friction. Such a flap is easy to produce.

In a further embodiment, a porous material is arranged in the primary air flow. The porous element may be formed as a porous ceramic or as a porous plastic. The porous material is also suitable for reducing pressure fluctuations in the primary air flow.

In a further embodiment, the device has an outlet opening towards the burner. Preferably, the outlet opening in this case in a space formed between a cooking plate and a trough of the gas hob, with which the burner is connected in air conduction.

In a further embodiment, the flap is arranged in the region of the outlet opening and / or closes the outlet opening at least in sections. Such a flap can be easily mounted.

In a further embodiment, the porous material closes the outlet opening. This arrangement of the porous material is easy to manufacture.

In a further embodiment, the gas hob has a hob plate on which a tray is arranged on the underside. The pan preferably seals airtight against the cooking plate and has only one opening through which the primary air passes through the means for reducing pressure fluctuations to the burner. In a further embodiment, the device is arranged at least in sections in a space enclosed by the hob plate and the tub. As a result, the device can be accommodated easily and protected in the gas hob.

In a further embodiment, the device has an inlet opening, which is connected to the ambient air through an opening in the trough. The "opening in the tub" preferably also includes the case that the opening is limited only by the tub and is not completely formed in this.

In a further embodiment, the interior is connected in an air-conducting manner with the opening in the trough. Air outside the interior thus does not get to the opening in the tub.

In a further embodiment, the gas hob is integrated in a worktop, below which the interior is formed. The interior may have drawers or be accessible by doors from the outside.

Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments of the gas hob or of the kitchen appliance described above or below with regard to the exemplary embodiments. The skilled person will also add or modify 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 invention described below. Furthermore, the invention will be explained in more detail by means of preferred embodiments with reference to the attached figures.

• Fig. 1: zeigt in einer perspektivischen Ansicht ausschnittsweise ein Küchenmöbel;
• Fig. 2: perspektivisch ein ausgebrochen dargestelltes Detail aus Fig. 1;
• Fig. 3: in schematischer Schnittansicht eine Einrichtung zum Reduzieren von Druckschwankungen gemäß einem Ausführungsbeispiel;
• Fig. 4: in schematischer Schnittansicht die Einrichtung aus Fig. 3 gemäß einer Variante; und
• Fig. 5: in schematischer Schnittansicht die Einrichtung aus Fig. 3 gemäß einer weiteren Variante.

It shows:

• Fig. 1 : shows a perspective view of a detail of a kitchen furniture;
• Fig. 2 : Perspective view of an erupted detail Fig. 1 ;
• Fig. 3 in a schematic sectional view of a device for reducing pressure fluctuations according to an embodiment;
• Fig. 4 in a schematic sectional view of the device Fig. 3 according to a variant; and
• Fig. 5 in a schematic sectional view of the device Fig. 3 according to another variant.

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

Fig. 1 shows in a perspective view fragmentary a kitchen furniture. 1 Fig. 2 shows in perspective a broken-out detail shown Fig. 1 ,

The kitchen furniture 1 has a worktop 2, in which a gas hob 3 is integrated. Below the worktop 2, an interior 4 is formed, which may have drawers or doors, not shown.

The gas hob 3 comprises a burner 5 for heating a cooking utensil (not shown) or the like over an open flame. Of course, the gas hob 3 may also have a plurality of burners 5. The gas hob 3 also has a hob plate 6, from which the burner 5 protrudes from the top. The hob plate 6 is in Fig. 1 broken out to reveal the underlying details. On the underside, the gas hob 3 is formed with a trough 7, which defines a space 11 together with the hob plate 6 and seals against these by means of a peripheral flange 12 airtight. The burner 5 is supplied from the interior 4 for the combustion process with primary air (a corresponding primary air flow is denoted by 13).

The gas hob 3 also has a device 14 for reducing pressure fluctuations in the primary air flow 13. Pressure fluctuations in the interior 4, which result, for example, by opening or closing the drawers or doors, can thus no longer propagate as far as the burner 5 or can no longer impair the function of the burner 5.

The device 14 comprises two comb-like sections 15, 16, in particular of sheet metal or plastic. The sections 15, 16 each comprise a plurality of teeth 17, 18. For example, one section 15 may have three teeth 17 and the other section 16 may have four teeth 18. The teeth 17, 18 may, for example, extend vertically (ie in the direction of gravity). A respective tooth 17 of the one section 15 engages in a gap 21 formed between two respective teeth 18 of the other section 16. This results in a labyrinth in the form of a meandering passage 20 with an inlet opening 22 and an outlet opening 23, through which the primary air flow 13 of the Entrance to the outlet opening 22, 23 must flow in order to get from the interior 4 to the burner 5. In the meandering passage 20, the flow direction 24, 24 'of the primary air flow 13 is reversed several times, for example six times. By "flow reversal" is meant that a second flow direction 24 'as a whole or at least a component of movement thereof is opposite to a first flow direction 24. Due to the resulting multiple flow reversal, pressure fluctuations in the interior 4 are only greatly buffered passed to the burner 5. The meandering passage 20 is optimally adapted to the desired reduction in pressure fluctuations in terms of its shape, for example in terms of its cross-section.

The sections 15, 16 are part of a hermetically sealed housing, which on its one side only to the interior 4, the inlet opening 22 and on its other side towards the burner 5 or towards the between the cooking plate 6 and the trough 7 formed Interspace 11, the outlet opening 23 has. The inlet opening 22 is by means of an opening 25 in the trough 7 with the interior 4 in air-conducting connection. A the inlet opening 22 exhibiting portion 26 of the housing can bear directly against a vertical wall 27 of the trough 7. The wall 27 connects a bottom 31 of the tub 7 with the flange 12 thereof.

Fig. 3 shows a schematic sectional view of a device 14 for reducing pressure fluctuations according to another embodiment.

The device 14 according to Fig. 3 is different from that according to the Fig. 2 and 3 in that the teeth 17, 18 extend horizontally or slightly deviating from the horizontal. For example, the teeth 17, 18 may extend at an angle 32 of, for example, between 1 and 10 degrees other than the horizontal.

Further shows Fig. 3 in that the teeth 17, 18 may have a bend 30, as exemplified by a tooth 18.

Fig. 4 shows a schematic sectional view of a device 14 for reducing pressure fluctuations according to yet another embodiment.

The device 14 according to Fig. 4 points towards the device 14 according to Fig. 3 in addition, a flap 33. The flap 33 is hinged by means of a frictional hinge 34 pivotally. The flap 33 closes in the illustrated, normal operating state, the outlet opening 23 only partially. "Normal" here means that a defined primary air flow through the device 14 to the burner 5 is to provide for a desired combustion. If there is now a pressure fluctuation in the interior 4, then the flap 33 pivots by means of the hinge 34. The coefficient of friction of the hinge 34 is provided such that the pressure fluctuation is suitably reduced.

Fig. 5 shows a schematic sectional view of a device 14 for reducing pressure fluctuations according to yet another embodiment.

In the device 14 according to Fig. 5 is unlike the device 14 according to Fig. 3 the outlet opening 23 is closed by a porous material 35. The porous material 35 may be, for example, a porous ceramic or a porous plastic. The material 35 accordingly has a plurality of pores, not shown, which penetrate the primary air stream 13 on its way to the burner 5 got to. The pores are dimensioned such that pressure fluctuations in the interior 4 are only greatly buffered passed to the burner 5.

Used reference signs:

1

kitchen furniture

2

countertop

3

Gas cooktop

4

inner space

5

burner

6

Hotplate

7

tub

11

room

12

flange

13

Primary air flow

14

Device for reducing pressure fluctuations

15

section

16

section

17

tooth

18

tooth

20

corridor

21

gap

22

inlet opening

23

outlet opening

24

flow direction

24 '

flow direction

25

opening

26

section

27

wall

30

kink

31

ground

32

angle

33

flap

34

hinge

35

porous material

Claims (13)

1. Gas hob (3) for kitchen furniture (1), having a burner (5) and a device (14) for reducing pressure fluctuations in a primary air flow (13) supplied to the burner (5), wherein the primary air flow (13) can be supplied from below a worktop (2) of the kitchen furniture (1), wherein the device (14) reverses a movement component of a direction of flow (24, 24') of the primary air flow (13) at least once using a labyrinth (20), characterised in that the device (14) has an element (33) which is arranged at least partially in the primary air flow (13), which is embodied to be moveable in a frictional manner, and wherein a corresponding friction value is appropriately provided to reduce the pressure fluctuations.
2. Gas hob according to claim 1, characterised in that the device (14) has two comb-type sections (15, 16), which between themselves define the labyrinth (20) and to this end comprise a number of teeth (17, 18) which mesh with one another.
3. Gas hob according to claim 1, characterised in that the element (33) is embodied as a flap, which is hinged frictionally in a pivotable manner.
4. Gas hob according to one of claims 1 - 3, characterised in that a porous material (35) is arranged in the primary air flow (13).
5. Gas hob according to one of claims 1 - 4, characterised in that the device (14) has an outlet opening (23) for the primary air flow (13) toward the burner (5).
6. Gas hob according to claim 5, characterised in that the element (33) is arranged in the region of the outlet opening (23) and/or the outlet opening (23) closes at least in sections.
7. Gas hob according to claim 4 and one of claims 5 or 6, characterised in that the porous material (35) closes the outlet opening (23).
8. Gas hob according to one of claims 1 - 7, characterised in that the gas hob (3) has a hotplate (6), on the underside of which a trough (7) is arranged.
9. Gas hob according to claim 8, characterised in that the device (14) is arranged at least in sections in a space (11) enclosed by the hotplate (6) and the trough (7).
10. Gas hob according to claim 8 or 9, characterised in that the device (14) has an inlet opening (22) for the primary air flow (13), which is connected to the ambient air through an opening (25) in the trough (7).
11. Kitchen furniture (1) with a gas hob (3) according to one of claims 1 - 10 and an interior (4), with which the device (14) is connected in a air-conducting manner in order to supply the primary air flow (13) to the burner (5).
12. Kitchen furniture according to claim 11, characterised in that the interior (4) is connected to the opening (25) in the trough (7) in an air-conducting manner.
13. Kitchen furniture according to claim 11 or 12, characterised in that the gas hob (3) is integrated into a worktop (2), below which the interior (4) is formed.

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